Version Packages (#191)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.changeset/config.json

@@ -1,6 +1,6 @@
 {
 	"$schema": "https://unpkg.com/@changesets/config@3.1.1/schema.json",
-	"changelog": ["@svitejs/changesets-changelog-github-compact", { "repo": "sveltejs/mcp" }],
+	"changelog": ["@svitejs/changesets-changelog-github-compact", { "repo": "sveltejs/ai-tools" }],
 	"commit": false,
 	"fixed": [],
 	"linked": [],

.claude-plugin/marketplace.json

@@ -6,7 +6,7 @@
 	"plugins": [
 		{
 			"name": "svelte",
-			"source": "./plugins/svelte",
+			"source": "./plugins/claude/svelte",
 			"description": "A plugin for all things Svelte development, MCP, skills, and more.",
 			"lspServers": {
 				"svelte": {

.cursor-plugin/marketplace.json

@@ -0,0 +1,13 @@
+{
+	"name": "svelte",
+	"owner": {
+		"name": "Svelte"
+	},
+	"plugins": [
+		{
+			"name": "svelte",
+			"source": "./plugins/cursor/svelte",
+			"description": "A plugin for all things Svelte development, MCP, skills, and more."
+		}
+	]
+}

.github/workflows/check.yml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@v5
         with:
           version: 10.28.2
 

.github/workflows/lint.yml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@v5
         with:
           version: 10.28.2
 

.github/workflows/release-svelte-skill.yml

@@ -1,23 +1,44 @@
-name: Release Svelte Code Writer Skill
+name: Release Svelte Skills
 
 on:
   push:
     branches:
       - main
     paths:
-      - 'plugins/svelte/skills/svelte-code-writer/**'
+      - 'tools/skills/**'
   workflow_dispatch:
 
 permissions: {}
 
 jobs:
+  detect-skills:
+    permissions:
+      contents: read
+    if: github.repository == 'sveltejs/ai-tools'
+    name: Detect changed skills
+    runs-on: ubuntu-latest
+    outputs:
+      skills: ${{ steps.find-skills.outputs.skills }}
+    steps:
+      - name: checkout
+        uses: actions/checkout@v6
+
+      - name: Find all skills
+        id: find-skills
+        run: |
+          skills=$(ls -d tools/skills/*/ | xargs -I {} basename {} | jq -R -s -c 'split("\n") | map(select(length > 0))')
+          echo "skills=$skills" >> $GITHUB_OUTPUT
+
   release:
+    needs: detect-skills
+    if: needs.detect-skills.outputs.skills != '[]'
     permissions:
       contents: write
-    # prevents this action from running on forks
-    if: github.repository == 'sveltejs/mcp'
-    name: Release Svelte Code Writer Skill
+    name: Release ${{ matrix.skill }}
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        skill: ${{ fromJson(needs.detect-skills.outputs.skills) }}
     steps:
       - name: checkout
         uses: actions/checkout@v6
@@ -28,18 +49,18 @@ jobs:
 
       - name: Create zip
         run: |
-          cd plugins/svelte/skills
-          zip -r svelte-code-writer.zip svelte-code-writer/
+          cd tools/skills
+          zip -r ${{ matrix.skill }}.zip ${{ matrix.skill }}/
 
       - name: Create Release
         uses: softprops/action-gh-release@v2
         with:
-          tag_name: svelte-code-writer-v${{ steps.version.outputs.version }}
-          name: Svelte Code Writer Skill v${{ steps.version.outputs.version }}
+          tag_name: ${{ matrix.skill }}-v${{ steps.version.outputs.version }}
+          name: ${{ matrix.skill }} v${{ steps.version.outputs.version }}
           body: |
-            Automated release of the Svelte Code Writer skill.
+            Automated release of the ${{ matrix.skill }} skill.
 
-            This release was triggered by changes to the `plugins/svelte/skills/svelte-code-writer/` directory.
-          files: plugins/svelte/skills/svelte-code-writer.zip
+            This release was triggered by changes to the `tools/skills/${{ matrix.skill }}/` directory.
+          files: tools/skills/${{ matrix.skill }}.zip
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
       id-token: write # OpenID Connect token needed for provenance
       pull-requests: write # to create pull request (changesets/action)
     # prevents this action from running on forks
-    if: github.repository == 'sveltejs/mcp'
+    if: github.repository == 'sveltejs/ai-tools'
     name: Release
     runs-on: ${{ matrix.os }}
     outputs:

.github/workflows/sync-agents-md.yml

@@ -1,71 +0,0 @@
-name: Sync Agents Documentation
-
-on:
-  push:
-    branches:
-      - main
-    paths:
-      - 'instructions/AGENTS.md'
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  sync-agents:
-    # prevents this action from running on forks
-    if: github.repository == 'sveltejs/mcp'
-    name: Sync AGENTS.md to OpenCode Package and Docs
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-        with:
-          fetch-depth: 0
-
-      - name: Setup Node.js
-        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
-        with:
-          node-version: 24
-          package-manager-cache: false # pnpm is not installed yet
-
-      - name: Install pnpm
-        shell: bash
-        run: |
-          PNPM_VER=$(jq -r '.packageManager | if .[0:5] == "pnpm@" then .[5:] else "packageManager in package.json does not start with pnpm@\n" | halt_error(1)  end' package.json)
-          echo installing pnpm version $PNPM_VER
-          npm i -g pnpm@$PNPM_VER
-
-      - name: Sync AGENTS.md
-        run: pnpm sync-agents-md
-
-      - name: Check for changes
-        id: git-check
-        run: |
-          git diff --exit-code packages/opencode/instructions/opencode-agents.md documentation/docs/10-introduction/.generated/agents.md || echo "changed=true" >> $GITHUB_OUTPUT
-
-      - name: Create Pull Request
-        if: steps.git-check.outputs.changed == 'true'
-        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          commit-message: 'chore: sync AGENTS.md to opencode package and documentation'
-          branch: chore/sync-agents-md
-          delete-branch: true
-          title: 'chore: sync AGENTS.md to opencode package and documentation'
-          body: |
-            ## Summary
-            Automatically synced AGENTS.md to the opencode package and documentation.
-
-            This PR was triggered by changes to `instructions/AGENTS.md`.
-
-            ## Changes
-            - Synced `packages/opencode/instructions/opencode-agents.md` with latest AGENTS.md
-            - Updated `documentation/docs/10-introduction/.generated/agents.md` with latest content
-
-            ## Generated by
-            GitHub Action: Sync Agents Documentation
-          labels: |
-            chore
-            documentation
-            automated

.github/workflows/sync-docs-skills.yml

@@ -0,0 +1,116 @@
+name: Sync Skills
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+  actions: write
+
+jobs:
+  sync-skills:
+    if: github.repository == 'sveltejs/ai-tools'
+    name: Sync skills from svelte.dev
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+        with:
+          node-version: 24
+          package-manager-cache: false # pnpm is not installed yet
+
+      - name: Install pnpm
+        shell: bash
+        run: |
+          PNPM_VER=$(jq -r '.packageManager | if .[0:5] == "pnpm@" then .[5:] else "packageManager in package.json does not start with pnpm@\n" | halt_error(1) end' package.json)
+          echo installing pnpm version "$PNPM_VER"
+          npm i -g "pnpm@$PNPM_VER"
+
+      - name: Setup Node.js with pnpm cache
+        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+        with:
+          node-version: 24
+          package-manager-cache: true # caches pnpm via packageManager field in package.json
+          cache: 'pnpm'
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile --prefer-offline --ignore-scripts
+
+      - name: Clone svelte.dev
+        run: git clone --depth 2 https://github.com/sveltejs/svelte.dev.git "${{ runner.temp }}/svelte.dev"
+
+      - name: Discover changed skill files
+        id: discover
+        env:
+          SVELTE_DEV_ROOT: ${{ runner.temp }}/svelte.dev
+        run: |
+          skill_files=$(git -C "$SVELTE_DEV_ROOT" diff --name-only --diff-filter=ACMR HEAD~1 HEAD | grep '^apps/svelte.dev/content/docs/.*\.md$' | xargs -I{} grep -l '^skill: *true' "$SVELTE_DEV_ROOT/{}" || true)
+          echo "skill_files=$skill_files" >> "$GITHUB_OUTPUT"
+
+      - name: Sync skills
+        if: steps.discover.outputs.skill_files != ''
+        env:
+          SVELTE_DEV_ROOT: ${{ runner.temp }}/svelte.dev
+          DOCS_PREFIX: apps/svelte.dev/content/docs/
+        run: |
+          for full_path in ${{ steps.discover.outputs.skill_files }}; do
+            file="${full_path#$SVELTE_DEV_ROOT/}"
+            name=$(grep '^name: ' "$full_path" | head -1 | sed 's/^name: *//')
+            repo="${file#$DOCS_PREFIX}"
+            repo="${repo#/}"
+            repo="${repo%%/*}"
+
+            output_dir="tools/skills/$name"
+            rm -rf "$output_dir"
+            mkdir -p "$output_dir"
+
+            pnpm resolve-references --file "$full_path" --repo "$repo" --output "$output_dir"
+          done
+
+      - name: Sync plugins
+        if: steps.discover.outputs.skill_files != ''
+        run: |
+          pnpm sync-claude-plugin
+          pnpm sync-cursor-plugin
+          pnpm sync-opencode-plugin
+          pnpm generate-skill-docs
+          pnpm bump-plugin-versions
+
+      - name: Check for changes
+        id: git-check
+        run: |
+          git diff --exit-code -- tools/skills/ plugins/ packages/opencode/ documentation/docs/ || echo "changed=true" >> "$GITHUB_OUTPUT"
+
+      - name: Create Pull Request
+        if: steps.git-check.outputs.changed == 'true'
+        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: 'chore: sync skills from svelte.dev'
+          branch: chore/sync-skills
+          delete-branch: true
+          title: 'chore: sync skills from svelte.dev'
+          body: |
+            ## Summary
+            Automatically synced skill markdown from `sveltejs/svelte.dev` into `tools/skills/`.
+
+            ## Changes
+            - Cloned `sveltejs/svelte.dev`
+            - Filtered markdown files with `skill: true` frontmatter
+            - Rebuilt synced skill folders with `scripts/resolve-references.ts`
+            - Synced `plugins/claude/svelte/` (skills, agents)
+            - Synced `plugins/cursor/svelte/` (skills, agents, rules)
+            - Synced `packages/opencode/` (skills, instructions)
+            - Updated documentation
+
+            ## Generated by
+            GitHub Action: Sync Skills
+          labels: |
+            chore
+            automated

.github/workflows/sync-plugins.yml

@@ -1,21 +1,21 @@
-name: Sync OpenCode Skills
+name: Sync Plugins
 
 on:
   push:
     branches:
       - main
     paths:
-      - 'plugins/svelte/skills/**'
+      - 'tools/**'
 
 permissions:
   contents: write
   pull-requests: write
 
 jobs:
-  sync-skills:
+  sync-plugins:
     # prevents this action from running on forks
-    if: github.repository == 'sveltejs/mcp'
-    name: Sync Skills to OpenCode Package and Update Docs
+    if: github.repository == 'sveltejs/ai-tools'
+    name: Sync Plugins from tools/
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -46,8 +46,8 @@ jobs:
       - name: Install dependencies
         run: pnpm install --frozen-lockfile --prefer-offline --ignore-scripts
 
-      - name: Sync skills folder
-        run: pnpm sync-opencode-skills
+      - name: Sync plugins
+        run: pnpm sync-plugins
 
       - name: Generate skills documentation
         run: pnpm generate-skill-docs
@@ -55,30 +55,38 @@ jobs:
       - name: Check for changes
         id: git-check
         run: |
-          git diff --exit-code packages/opencode/skills documentation/docs/60-skills/10-skills.md || echo "changed=true" >> $GITHUB_OUTPUT
+          git diff --exit-code \
+            plugins/claude/svelte/ \
+            plugins/cursor/svelte/ \
+            packages/opencode/skills/ \
+            packages/opencode/instructions/ \
+            packages/opencode/schema.json \
+            documentation/docs/ \
+            || echo "changed=true" >> $GITHUB_OUTPUT
 
       - name: Create Pull Request
         if: steps.git-check.outputs.changed == 'true'
         uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          commit-message: 'chore: sync skills and update documentation'
-          branch: chore/sync-opencode-skills
+          commit-message: 'chore: sync plugins from tools/'
+          branch: chore/sync-plugins
           delete-branch: true
-          title: 'chore: sync skills and update documentation'
+          title: 'chore: sync plugins from tools/'
           body: |
             ## Summary
-            Automatically synced skills and updated documentation.
+            Automatically synced all plugins from the `tools/` source of truth.
 
-            This PR was triggered by changes to the skills folder in `plugins/svelte/skills/`.
+            This PR was triggered by changes to `tools/**`.
 
             ## Changes
-            - Synced `packages/opencode/skills/` with latest skill definitions
-            - Updated `documentation/docs/60-skills/10-skills.md` with latest skill documentation
+            - Synced `plugins/claude/svelte/` (skills, agents with `permissionMode`)
+            - Synced `plugins/cursor/svelte/` (skills, agents, rules)
+            - Synced `packages/opencode/` (skills, instructions, schema)
+            - Updated documentation
 
             ## Generated by
-            GitHub Action: Sync OpenCode Skills
+            GitHub Action: Sync Plugins
           labels: |
             chore
-            documentation
             automated

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@v5
         with:
           version: 10.28.2
 

.github/workflows/update-opencode-jsonschema.yml

@@ -14,7 +14,7 @@ permissions:
 jobs:
   update-docs:
     # prevents this action from running on forks
-    if: github.repository == 'sveltejs/mcp'
+    if: github.repository == 'sveltejs/ai-tools'
     name: Update OpenCode JSON Schema
     runs-on: ubuntu-latest
     steps:

.github/workflows/update-prompt-docs.yml

@@ -14,7 +14,7 @@ permissions:
 jobs:
   update-docs:
     # prevents this action from running on forks
-    if: github.repository == 'sveltejs/mcp'
+    if: github.repository == 'sveltejs/ai-tools'
     name: Update Prompt Documentation
     runs-on: ubuntu-latest
     steps:

.prettierrc

@@ -10,6 +10,12 @@
 			"options": {
 				"parser": "svelte"
 			}
+		},
+		{
+			"files": "**/references/*.md",
+			"options": {
+				"embeddedLanguageFormatting": "off"
+			}
 		}
 	]
 }

documentation/docs/10-introduction/10-overview.md

@@ -17,6 +17,10 @@ To get the most out of the MCP server we recommend including the following promp
 
 > [!NOTE] This is already setup for you when using `npx sv add mcp`
 
+<!-- prettier-ignore-start -->
+````markdown
 @include .generated/agents.md
+````
+<!-- prettier-ignore-end -->
 
 If your MCP client supports it, we also recommend using the [svelte-task](prompts#svelte-task) prompt to instruct the LLM on the best way to use the MCP server.

documentation/docs/30-capabilities/.generated/prompts.md

@@ -5,10 +5,22 @@ This prompt should be used whenever you are asking the model to work on a Svelte
 <details>
 	<summary>Copy the prompt</summary>
 
-```md
+<!-- prettier-ignore-start -->
+````markdown
 You are a Svelte expert tasked to build components and utilities for Svelte developers. If you need documentation for anything related to Svelte you can invoke the tool `get-documentation` with one of the following paths. However: before invoking the `get-documentation` tool, try to answer the users query using your own knowledge and the `svelte-autofixer` tool. Be mindful of how many section you request, since it is token-intensive!
 <available-docs>
 
+- title: Overview, use_cases: use title and path to estimate use case, path: ai/overview
+- title: Local setup, use_cases: use title and path to estimate use case, path: ai/local-setup
+- title: Remote setup, use_cases: use title and path to estimate use case, path: ai/remote-setup
+- title: Tools, use_cases: use title and path to estimate use case, path: ai/tools
+- title: Resources, use_cases: use title and path to estimate use case, path: ai/resources
+- title: Prompts, use_cases: use title and path to estimate use case, path: ai/prompts
+- title: Overview, use_cases: use title and path to estimate use case, path: ai/plugin
+- title: Subagent, use_cases: use title and path to estimate use case, path: ai/subagent
+- title: Overview, use_cases: use title and path to estimate use case, path: ai/opencode-plugin
+- title: Subagent, use_cases: use title and path to estimate use case, path: ai/opencode-subagent
+- title: Overview, use_cases: use title and path to estimate use case, path: ai/skills
 - title: Overview, use_cases: project setup, creating new svelte apps, scaffolding, cli tools, initializing projects, path: cli/overview
 - title: Frequently asked questions, use_cases: project setup, initializing new svelte projects, troubleshooting cli installation, package manager configuration, path: cli/faq
 - title: sv create, use_cases: project setup, starting new sveltekit app, initializing project, creating from playground, choosing project template, path: cli/sv-create
@@ -18,7 +30,7 @@ You are a Svelte expert tasked to build components and utilities for Svelte deve
 - title: devtools-json, use_cases: development setup, chrome devtools integration, browser-based editing, local development workflow, debugging setup, path: cli/devtools-json
 - title: drizzle, use_cases: database setup, sql queries, orm integration, data modeling, postgresql, mysql, sqlite, server-side data access, database migrations, type-safe queries, path: cli/drizzle
 - title: eslint, use_cases: code quality, linting, error detection, project setup, code standards, team collaboration, typescript projects, path: cli/eslint
-- title: lucia, use_cases: authentication, login systems, user management, registration pages, session handling, auth setup, path: cli/lucia
+- title: better-auth, use_cases: use title and path to estimate use case, path: cli/better-auth
 - title: mcp, use_cases: use title and path to estimate use case, path: cli/mcp
 - title: mdsvex, use_cases: blog, content sites, markdown rendering, documentation sites, technical writing, cms integration, article pages, path: cli/mdsvex
 - title: paraglide, use_cases: internationalization, multi-language sites, i18n, translation, localization, language switching, global apps, multilingual content, path: cli/paraglide
@@ -29,6 +41,7 @@ You are a Svelte expert tasked to build components and utilities for Svelte deve
 - title: tailwindcss, use_cases: project setup, styling, css framework, rapid prototyping, utility-first css, design systems, responsive design, adding tailwind to svelte, path: cli/tailwind
 - title: vitest, use_cases: testing, unit tests, component testing, test setup, quality assurance, ci/cd pipelines, test-driven development, path: cli/vitest
 - title: add-on, use_cases: use title and path to estimate use case, path: cli/add-on
+- title: sv-utils, use_cases: use title and path to estimate use case, path: cli/sv-utils
 - title: Introduction, use_cases: learning sveltekit, project setup, understanding framework basics, choosing between svelte and sveltekit, getting started with full-stack apps, path: kit/introduction
 - title: Creating a project, use_cases: project setup, starting new sveltekit app, initial development environment, first-time sveltekit users, scaffolding projects, path: kit/creating-a-project
 - title: Project types, use_cases: deployment, project setup, choosing adapters, ssg, spa, ssr, serverless, mobile apps, desktop apps, pwa, offline apps, browser extensions, separate backend, docker containers, path: kit/project-types
@@ -96,17 +109,6 @@ You are a Svelte expert tasked to build components and utilities for Svelte deve
 - title: Configuration, use_cases: project setup, configuration, adapters, deployment, build settings, environment variables, routing customization, prerendering, csp security, csrf protection, path configuration, typescript setup, path: kit/configuration
 - title: Command Line Interface, use_cases: project setup, typescript configuration, generated types, ./$types imports, initial project configuration, path: kit/cli
 - title: Types, use_cases: typescript, type safety, route parameters, api endpoints, load functions, form actions, generated types, jsconfig setup, path: kit/types
-- title: Overview, use_cases: use title and path to estimate use case, path: mcp/overview
-- title: Local setup, use_cases: use title and path to estimate use case, path: mcp/local-setup
-- title: Remote setup, use_cases: use title and path to estimate use case, path: mcp/remote-setup
-- title: Tools, use_cases: use title and path to estimate use case, path: mcp/tools
-- title: Resources, use_cases: use title and path to estimate use case, path: mcp/resources
-- title: Prompts, use_cases: use title and path to estimate use case, path: mcp/prompts
-- title: Overview, use_cases: use title and path to estimate use case, path: mcp/plugin
-- title: Skill, use_cases: use title and path to estimate use case, path: mcp/skill
-- title: Subagent, use_cases: use title and path to estimate use case, path: mcp/subagent
-- title: Overview, use_cases: use title and path to estimate use case, path: mcp/opencode-plugin
-- title: Subagent, use_cases: use title and path to estimate use case, path: mcp/opencode-subagent
 - title: Overview, use_cases: always, any svelte project, getting started, learning svelte, introduction, project setup, understanding framework basics, path: svelte/overview
 - title: Getting started, use_cases: project setup, starting new svelte project, initial installation, choosing between sveltekit and vite, editor configuration, path: svelte/getting-started
 - title: .svelte files, use_cases: always, any svelte project, component creation, project setup, learning svelte basics, path: svelte/svelte-files
@@ -154,6 +156,7 @@ You are a Svelte expert tasked to build components and utilities for Svelte deve
 - title: Lifecycle hooks, use_cases: component initialization, cleanup tasks, timers, subscriptions, dom measurements, chat windows, autoscroll features, migration from svelte 4, path: svelte/lifecycle-hooks
 - title: Imperative component API, use_cases: project setup, client-side rendering, server-side rendering, ssr, hydration, testing, programmatic component creation, tooltips, dynamic mounting, path: svelte/imperative-component-api
 - title: Hydratable data, use_cases: use title and path to estimate use case, path: svelte/hydratable
+- title: Best practices, use_cases: use title and path to estimate use case, path: svelte/best-practices
 - title: Testing, use_cases: testing, quality assurance, unit tests, integration tests, component tests, e2e tests, vitest setup, playwright setup, test automation, path: svelte/testing
 - title: TypeScript, use_cases: typescript setup, type safety, component props typing, generic components, wrapper components, dom type augmentation, project configuration, path: svelte/typescript
 - title: Custom elements, use_cases: web components, custom elements, component library, design system, framework-agnostic components, embedding svelte in non-svelte apps, shadow dom, path: svelte/custom-elements
@@ -204,6 +207,7 @@ This is the task you will work on:
 </task>
 
 If you are not writing the code into a file, once you have the final version of the code ask the user if it wants to generate a playground link to quickly check the code in it and if it answer yes call the `playground-link` tool and return the url to the user nicely formatted. The playground link MUST be generated only once you have the final version of the code and you are ready to share it, it MUST include an entry point file called `App.svelte` where the main component should live. If you have multiple files to include in the playground link you can include them all at the root.
-```
+````
+<!-- prettier-ignore-end -->
 
 </details>

documentation/docs/40-claude-plugin/plugin.md

@@ -2,7 +2,7 @@
 title: Overview
 ---
 
-The open source [repository](https://github.com/sveltejs/mcp) containing the code for the MCP server is also a Claude Code Marketplace plugin.
+The open source [repository](https://github.com/sveltejs/ai-tools) containing the code for the MCP server is also a Claude Code Marketplace plugin.
 
 The marketplace allows you to install the `svelte` plugin which will give you the remote MCP server, [skills](skills) to instruct the LLM on how to properly write Svelte 5 code, and a specialized agent for editing Svelte files.
 
@@ -13,7 +13,7 @@ If possible, we recommend that you instruct the LLM to execute MCP calls with th
 To add the repository as a marketplace, launch Claude Code and type the following:
 
 ```bash
-/plugin marketplace add sveltejs/mcp
+/plugin marketplace add sveltejs/ai-tools
 ```
 
 Then, install the Svelte plugin:

documentation/docs/50-opencode-plugin/opencode-plugin.md

@@ -6,7 +6,7 @@ OpenCode has a [plugin system](https://opencode.ai/docs/plugins/) that allows de
 
 ## Installation
 
-To install the plugin in OpenCode you can edit your [OpenCode config]() (either the global or the local one), adding `@sveltejs/opencode` to the list of plugins.
+To install the plugin in OpenCode you can edit your [OpenCode config](https://opencode.ai/docs/config/) (either the global or the local one), adding `@sveltejs/opencode` to the list of plugins.
 
 ```json
 {
@@ -23,16 +23,24 @@ The default configuration for the Svelte OpenCode plugin looks like this...
 
 ```json
 {
-	"$schema": "https://raw.githubusercontent.com/sveltejs/mcp/refs/heads/main/packages/opencode/schema.json",
+	"$schema": "https://svelte.dev/opencode/schema.json",
 	"mcp": {
 		"type": "remote",
 		"enabled": true
 	},
 	"subagent": {
-		"enabled": true
+		"enabled": true,
+		"agents": {
+			"svelte-file-editor": {
+				"model": "other-model", // defaults to the same as main agent,
+				"temperature": 1, // default to unset
+				"top_p": 0.7, // default to unset,
+				"maxSteps": 20 // default to unlimited
+			}
+		}
 	},
 	"skills": {
-		"enabled": true
+		"enabled": true // it can also be an array of all the skills to enable like ['svelte-core-bestpractices']
 	},
 	"instructions": {
 		"enabled": true
@@ -40,6 +48,6 @@ The default configuration for the Svelte OpenCode plugin looks like this...
 }
 ```
 
-...but if you prefer, you can enable only the subagent, only the MCP, only the skills, or configure the kind of MCP server you want to use (`local` or `remote`).
+...but if you prefer, you can enable only the subagent, only the MCP, only the skills (`enabled` supports both a boolean or an array containing the name of all the skills to enable), or configure the kind of MCP server you want to use (`local` or `remote`).
 
 You can place this file in `./.opencode/svelte.json` (in your project), in `~/.config/opencode/svelte.json` or, if you have an `OPENCODE_CONFIG_DIR` environment variable specified, at `$OPENCODE_CONFIG_DIR/svelte.json`.

documentation/docs/60-skills/.generated/skills.md

@@ -2,7 +2,7 @@
 
 CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
 
-<a href="https://github.com/sveltejs/mcp/releases?q=svelte-code-writer" target="_blank" rel="noopener noreferrer">Open Releases page</a>
+<a href="https://github.com/sveltejs/ai-tools/releases?q=svelte-code-writer" target="_blank" rel="noopener noreferrer">Open Releases page</a>
 
 <details>
 	<summary>View skill content</summary>
@@ -74,3 +74,190 @@ npx @sveltejs/mcp svelte-autofixer ./Component.svelte --svelte-version 4
 <!-- prettier-ignore-end -->
 
 </details>
+
+## `svelte-core-bestpractices`
+
+Guidance on writing fast, robust, modern Svelte code. Load this skill whenever in a Svelte project and asked to write/edit or analyze a Svelte component or module. Covers reactivity, event handling, styling, integration with libraries and more.
+
+<a href="https://github.com/sveltejs/ai-tools/releases?q=svelte-core-bestpractices" target="_blank" rel="noopener noreferrer">Open Releases page</a>
+
+<details>
+	<summary>View skill content</summary>
+
+<!-- prettier-ignore-start -->
+````markdown
+## `$state`
+
+Only use the `$state` rune for variables that should be _reactive_ — in other words, variables that cause an `$effect`, `$derived` or template expression to update. Everything else can be a normal variable.
+
+Objects and arrays (`$state({...})` or `$state([...])`) are made deeply reactive, meaning mutation will trigger updates. This has a trade-off: in exchange for fine-grained reactivity, the objects must be proxied, which has performance overhead. In cases where you're dealing with large objects that are only ever reassigned (rather than mutated), use `$state.raw` instead. This is often the case with API responses, for example.
+
+## `$derived`
+
+To compute something from state, use `$derived` rather than `$effect`:
+
+```js
+// do this
+let square = $derived(num * num);
+
+// don't do this
+let square;
+
+$effect(() => {
+	square = num * num;
+});
+```
+
+> [!NOTE] `$derived` is given an expression, _not_ a function. If you need to use a function (because the expression is complex, for example) use `$derived.by`.
+
+Deriveds are writable — you can assign to them, just like `$state`, except that they will re-evaluate when their expression changes.
+
+If the derived expression is an object or array, it will be returned as-is — it is _not_ made deeply reactive. You can, however, use `$state` inside `$derived.by` in the rare cases that you need this.
+
+## `$effect`
+
+Effects are an escape hatch and should mostly be avoided. In particular, avoid updating state inside effects.
+
+- If you need to sync state to an external library such as D3, it is often neater to use [`{@attach ...}`](references/@attach.md)
+- If you need to run some code in response to user interaction, put the code directly in an event handler or use a [function binding](references/bind.md) as appropriate
+- If you need to log values for debugging purposes, use [`$inspect`](references/$inspect.md)
+- If you need to observe something external to Svelte, use [`createSubscriber`](references/svelte-reactivity.md)
+
+Never wrap the contents of an effect in `if (browser) {...}` or similar — effects do not run on the server.
+
+## `$props`
+
+Treat props as though they will change. For example, values that depend on props should usually use `$derived`:
+
+```js
+// @errors: 2451
+let { type } = $props();
+
+// do this
+let color = $derived(type === 'danger' ? 'red' : 'green');
+
+// don't do this — `color` will not update if `type` changes
+let color = type === 'danger' ? 'red' : 'green';
+```
+
+## `$inspect.trace`
+
+`$inspect.trace` is a debugging tool for reactivity. If something is not updating properly or running more than it should you can add `$inspect.trace(label)` as the first line of an `$effect` or `$derived.by` (or any function they call) to trace their dependencies and discover which one triggered an update.
+
+## Events
+
+Any element attribute starting with `on` is treated as an event listener:
+
+```svelte
+<button onclick={() => {...}}>click me</button>
+
+<!-- attribute shorthand also works -->
+<button {onclick}>...</button>
+
+<!-- so do spread attributes -->
+<button {...props}>...</button>
+```
+
+If you need to attach listeners to `window` or `document` you can use `<svelte:window>` and `<svelte:document>`:
+
+```svelte
+<svelte:window onkeydown={...} />
+<svelte:document onvisibilitychange={...} />
+```
+
+Avoid using `onMount` or `$effect` for this.
+
+## Snippets
+
+[Snippets](references/snippet.md) are a way to define reusable chunks of markup that can be instantiated with the [`{@render ...}`](references/@render.md) tag, or passed to components as props. They must be declared within the template.
+
+```svelte
+{#snippet greeting(name)}
+	<p>hello {name}!</p>
+{/snippet}
+
+{@render greeting('world')}
+```
+
+> [!NOTE] Snippets declared at the top level of a component (i.e. not inside elements or blocks) can be referenced inside `<script>`. A snippet that doesn't reference component state is also available in a `<script module>`, in which case it can be exported for use by other components.
+
+## Each blocks
+
+Prefer to use [keyed each blocks](references/each.md) — this improves performance by allowing Svelte to surgically insert or remove items rather than updating the DOM belonging to existing items.
+
+> [!NOTE] The key _must_ uniquely identify the object. Do not use the index as a key.
+
+Avoid destructuring if you need to mutate the item (with something like `bind:value={item.count}`, for example).
+
+## Using JavaScript variables in CSS
+
+If you have a JS variable that you want to use inside CSS you can set a CSS custom property with the `style:` directive.
+
+```svelte
+<div style:--columns={columns}>...</div>
+```
+
+You can then reference `var(--columns)` inside the component's `<style>`.
+
+## Styling child components
+
+The CSS in a component's `<style>` is scoped to that component. If a parent component needs to control the child's styles, the preferred way is to use CSS custom properties:
+
+```svelte
+<!-- Parent.svelte -->
+<Child --color="red" />
+
+<!-- Child.svelte -->
+<h1>Hello</h1>
+
+<style>
+	h1 {
+		color: var(--color);
+	}
+</style>
+```
+
+If this is impossible (for example, the child component comes from a library) you can use `:global` to override styles:
+
+```svelte
+<div>
+	<Child />
+</div>
+
+<style>
+	div :global {
+		h1 {
+			color: red;
+		}
+	}
+</style>
+```
+
+## Context
+
+Consider using context instead of declaring state in a shared module. This will scope the state to the part of the app that needs it, and eliminate the possibility of it leaking between users when server-side rendering.
+
+Use `createContext` rather than `setContext` and `getContext`, as it provides type safety.
+
+## Async Svelte
+
+If using version 5.36 or higher, you can use [await expressions](references/await-expressions.md) and [hydratable](references/hydratable.md) to use promises directly inside components. Note that these require the `experimental.async` option to be enabled in `svelte.config.js` as they are not yet considered fully stable.
+
+## Avoid legacy features
+
+Always use runes mode for new code, and avoid features that have more modern replacements:
+
+- use `$state` instead of implicit reactivity (e.g. `let count = 0; count += 1`)
+- use `$derived` and `$effect` instead of `$:` assignments and statements (but only use effects when there is no better solution)
+- use `$props` instead of `export let`, `$$props` and `$$restProps`
+- use `onclick={...}` instead of `on:click={...}`
+- use `{#snippet ...}` and `{@render ...}` instead of `<slot>` and `$$slots` and `<svelte:fragment>`
+- use `<DynamicComponent>` instead of `<svelte:component this={DynamicComponent}>`
+- use `import Self from './ThisComponent.svelte'` and `<Self>` instead of `<svelte:self>`
+- use classes with `$state` fields to share reactivity between components, instead of using stores
+- use `{@attach ...}` instead of `use:action`
+- use clsx-style arrays and objects in `class` attributes, instead of the `class:` directive
+````
+<!-- prettier-ignore-end -->
+
+</details>

documentation/docs/60-skills/10-skills.md

@@ -6,6 +6,6 @@ This is the list of available skills provided by the Svelte MCP package. Skills
 
 Skills are available in both the Claude Code plugin (installed via the marketplace) and the OpenCode plugin (`@sveltejs/opencode`). They can also be manually installed in your `.claude/skills/` or `.opencode/skills/` folder.
 
-You can download the latest skills from the [releases page](https://github.com/sveltejs/mcp/releases) or find them in the [`plugins/svelte/skills`](https://github.com/sveltejs/mcp/tree/main/plugins/svelte/skills) folder.
+You can download the latest skills from the [releases page](https://github.com/sveltejs/ai-tools/releases) or find them in the [`plugins/svelte/skills`](https://github.com/sveltejs/ai-tools/tree/main/plugins/svelte/skills) folder.
 
 @include .generated/skills.md

documentation/docs/index.md

@@ -1,3 +1,3 @@
 ---
-title: MCP
+title: AI
 ---

package.json

@@ -25,8 +25,14 @@
 		"debug:generate-summaries": "pnpm --filter @sveltejs/mcp-server run debug:generate-summaries",
 		"release": "pnpm --filter @sveltejs/mcp run build && changeset publish",
 		"changeset:version": "changeset version && pnpm --filter @sveltejs/mcp run update:version && git add --all",
-		"sync-opencode-skills": "rm -rf packages/opencode/skills && cp -r plugins/svelte/skills packages/opencode/skills",
-		"sync-agents-md": "rm -f packages/opencode/instructions/opencode-agents.md && rm -f documentation/docs/10-introduction/.generated/agents.md && mkdir -p packages/opencode/instructions && mkdir -p documentation/docs/10-introduction/.generated && cp instructions/AGENTS.md packages/opencode/instructions/opencode-agents.md && cp instructions/AGENTS.md documentation/docs/10-introduction/.generated/agents.md"
+		"sync-plugins": "pnpm sync-claude-plugin && pnpm sync-cursor-plugin && pnpm sync-opencode-plugin && pnpm bump-plugin-versions",
+		"sync-claude-plugin": "node scripts/sync-claude-plugin.ts",
+		"sync-cursor-plugin": "node scripts/sync-cursor-plugin.ts",
+		"sync-opencode-plugin": "node scripts/sync-opencode-plugin.ts && pnpm generate-opencode-jsonschema",
+		"bump-plugin-versions": "node scripts/bump-plugin-versions.ts",
+		"postbump-plugin-versions": "pnpm format",
+		"resolve-references": "node scripts/resolve-references.ts",
+		"postresolve-references": "pnpm format"
 	},
 	"keywords": [
 		"svelte",

packages/mcp-server/src/mcp/autofixers/add-autofixers-issues.test.ts

@@ -344,87 +344,111 @@ describe('add_autofixers_issues', () => {
 	});
 
 	describe('imported_runes', () => {
-		describe.each([{ source: 'svelte' }, { source: 'svelte/runes' }])(
-			'from "$source"',
-			({ source }) => {
-				describe.each(dollarless_runes)('single import ($rune)', ({ rune }) => {
-					it(`should add suggestions when importing '${rune}' from '${source}'`, () => {
-						const content = run_autofixers_on_code(`
+		describe.each([
+			{ source: 'svelte' },
+			{ source: 'svelte/runes' },
+			{ source: '@sveltejs/runes' },
+			{ source: '@sveltejs/vite-plugin-svelte' },
+		])('from "$source"', ({ source }) => {
+			describe.each(dollarless_runes)('single import ($rune)', ({ rune }) => {
+				it(`should add suggestions when importing '${rune}' from '${source}'`, () => {
+					const content = run_autofixers_on_code(`
 					<script>
 						import { ${rune} } from '${source}';
 					</script>`);
 
-						expect(content.suggestions.length).toBeGreaterThanOrEqual(1);
-						expect(content.suggestions).toContain(
-							`You are importing "${rune}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
-						);
-					});
+					expect(content.suggestions.length).toBeGreaterThanOrEqual(1);
+					expect(content.suggestions).toContain(
+						`You are importing "${rune}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
+					);
+				});
 
-					it(`should add suggestions when importing "${rune}" as the default export from '${source}'`, () => {
-						const content = run_autofixers_on_code(`
+				it(`should add suggestions when importing "${rune}" as the default export from '${source}'`, () => {
+					const content = run_autofixers_on_code(`
 					<script>
 						import ${rune} from '${source}';
 					</script>`);
 
-						expect(content.suggestions.length).toBeGreaterThanOrEqual(1);
-						expect(content.suggestions).toContain(
-							`You are importing "${rune}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
-						);
-					});
+					expect(content.suggestions.length).toBeGreaterThanOrEqual(1);
+					expect(content.suggestions).toContain(
+						`You are importing "${rune}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
+					);
+				});
 
-					it(`should add suggestions when importing '${rune}' as the namespace export from '${source}'`, () => {
-						const content = run_autofixers_on_code(`
+				it(`should add suggestions when importing '${rune}' as the namespace export from '${source}'`, () => {
+					const content = run_autofixers_on_code(`
 					<script>
 						import * as ${rune} from '${source}';
 					</script>`);
 
-						expect(content.suggestions.length).toBeGreaterThanOrEqual(1);
-						expect(content.suggestions).toContain(
-							`You are importing "${rune}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
-						);
-					});
+					expect(content.suggestions.length).toBeGreaterThanOrEqual(1);
+					expect(content.suggestions).toContain(
+						`You are importing "${rune}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
+					);
 				});
+			});
 
-				it(`should add suggestions when importing multiple runes from '${source}'`, () => {
-					const content = run_autofixers_on_code(`
+			it(`should add suggestions when importing multiple runes from '${source}'`, () => {
+				const content = run_autofixers_on_code(`
 					<script>
 						import { onMount, state, effect } from '${source}';
 					</script>`);
 
-					expect(content.suggestions.length).toBeGreaterThanOrEqual(2);
-					expect(content.suggestions).toContain(
-						`You are importing "state" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$state" directly.`,
-					);
-					expect(content.suggestions).toContain(
-						`You are importing "effect" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$effect" directly.`,
-					);
-				});
+				expect(content.suggestions.length).toBeGreaterThanOrEqual(2);
+				expect(content.suggestions).toContain(
+					`You are importing "state" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$state" directly.`,
+				);
+				expect(content.suggestions).toContain(
+					`You are importing "effect" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$effect" directly.`,
+				);
+			});
 
-				it(`should not add suggestions when importing other identifiers from '${source}'`, () => {
-					const content = run_autofixers_on_code(`
+			it(`should not add suggestions when importing other identifiers from '${source}'`, () => {
+				const content = run_autofixers_on_code(`
 					<script>
 						import { onMount } from '${source}';
 					</script>`);
 
-					expect(content.suggestions).not.toContain(
-						`You are importing "onMount" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$onMount" directly.`,
-					);
-				});
-			},
-		);
+				expect(content.suggestions).not.toContain(
+					`You are importing "onMount" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$onMount" directly.`,
+				);
+			});
+		});
 
 		describe.each(dollarless_runes)('importing $rune from external lib', ({ rune }) => {
-			it(`should not add suggestions when importing from packages that are not svelte`, () => {
+			it(`should not add suggestions when importing from packages whose name doesn't contain svelte`, () => {
+				const content = run_autofixers_on_code(`
+				<script>
+					import { ${rune} } from 'something-something';
+				</script>`);
+
+				expect(content.suggestions).not.toContain(
+					`You are importing "${rune}" from "something-something". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
+				);
+			});
+
+			it(`should add suggestions with a different hint when importing from packages whose name contains svelte but it's not official`, () => {
 				const content = run_autofixers_on_code(`
 				<script>
 					import { ${rune} } from 'svelte-something-something';
 				</script>`);
 
-				expect(content.suggestions).not.toContain(
-					`You are importing "${rune}" from "svelte-something-something". This is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly.`,
+				expect(content.suggestions).toContain(
+					`You are importing "${rune}" from "svelte-something-something". If you are trying to import runes to use them this is not necessary, all runes are globally available. Please remove this import and use "$${rune}" directly. If you are importing the function from a separate library ignore this suggestion.`,
 				);
 			});
 		});
+
+		it('should not add the imported_runes suggestion when importing derived from svelte/store', () => {
+			const content = run_autofixers_on_code(`
+			<script>
+				import { derived } from 'svelte/store';
+			</script>`);
+
+			expect(content.suggestions).not.toContain(
+				'You are importing "derived" from "svelte/store". This is not necessary, all runes are globally available. Please remove this import and use "$derived" directly.',
+			);
+		});
 	});
 
 	describe('derived_with_function', () => {

packages/mcp-server/src/mcp/autofixers/visitors/imported-runes.ts

@@ -3,10 +3,20 @@ import type { Autofixer } from './index.js';
 
 const dollarless_runes = base_runes.map((r) => r.replace('$', ''));
 
+function should_suggest_for_source(source: string, rune: string) {
+	if (!source.includes('svelte')) {
+		return false;
+	}
+	if (source === 'svelte/store' && rune === 'derived') {
+		return false;
+	}
+	return true;
+}
+
 export const imported_runes: Autofixer = {
 	ImportDeclaration(node, { state, next }) {
 		const source = (node.source.value || node.source.raw?.slice(1, -1))?.toString();
-		if (source && (source === 'svelte' || source.startsWith('svelte/'))) {
+		if (source) {
 			for (const specifier of node.specifiers) {
 				const id =
 					specifier.type === 'ImportDefaultSpecifier'
@@ -16,10 +26,25 @@ export const imported_runes: Autofixer = {
 							: specifier.type === 'ImportSpecifier'
 								? specifier.imported
 								: null;
-				if (id && id.type === 'Identifier' && dollarless_runes.includes(id.name)) {
-					state.output.suggestions.push(
-						`You are importing "${id.name}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${id.name}" directly.`,
-					);
+				if (
+					id &&
+					id.type === 'Identifier' &&
+					dollarless_runes.includes(id.name) &&
+					should_suggest_for_source(source, id.name)
+				) {
+					if (
+						source === 'svelte' ||
+						source.startsWith('svelte/') ||
+						source.startsWith('@sveltejs')
+					) {
+						state.output.suggestions.push(
+							`You are importing "${id.name}" from "${source}". This is not necessary, all runes are globally available. Please remove this import and use "$${id.name}" directly.`,
+						);
+					} else {
+						state.output.suggestions.push(
+							`You are importing "${id.name}" from "${source}". If you are trying to import runes to use them this is not necessary, all runes are globally available. Please remove this import and use "$${id.name}" directly. If you are importing the function from a separate library ignore this suggestion.`,
+						);
+					}
 				}
 			}
 		}

packages/mcp-server/src/mcp/handlers/tools/get-documentation.ts

@@ -91,16 +91,56 @@ export async function get_documentation_handler({
 		}
 	});
 
-	const has_any_success = results.some((result) => result.success);
-	let final_text = results.map((r) => r.content).join('\n\n---\n\n');
+	const successes = results.filter((r) => r.success);
+	const failed_sections = sections.filter(
+		(s) =>
+			!available_sections.some(
+				(a) => a.title.toLowerCase() === s.toLowerCase() || a.slug === s || a.url === s,
+			),
+	);
 
-	if (!has_any_success) {
-		const formatted_sections = await format_sections_list();
-
-		final_text += `\n\n---\n\n${SECTIONS_LIST_INTRO}\n\n${formatted_sections}\n\n${SECTIONS_LIST_OUTRO}`;
+	if (successes.length > 0 && failed_sections.length === 0) {
+		return successes.map((r) => r.content).join('\n\n---\n\n');
 	}
 
-	return final_text;
+	const parts: string[] = [];
+
+	if (successes.length > 0) {
+		parts.push(successes.map((r) => r.content).join('\n\n---\n\n'));
+	}
+
+	const fuzzy_results = failed_sections.map((requested) => {
+		const lower = requested.toLowerCase();
+		const matches = available_sections.filter(
+			(a) =>
+				a.title.toLowerCase().includes(lower) ||
+				a.slug.includes(lower) ||
+				lower.includes(a.slug.split('/').pop() ?? '') ||
+				a.use_cases.toLowerCase().includes(lower),
+		);
+		return { requested, matches };
+	});
+
+	const has_fuzzy = fuzzy_results.some((r) => r.matches.length > 0);
+
+	// Full list only when no successes and no fuzzy matches
+	if (successes.length === 0 && !has_fuzzy) {
+		const formatted_sections = await format_sections_list();
+		parts.push(`${SECTIONS_LIST_INTRO}\n\n${formatted_sections}\n\n${SECTIONS_LIST_OUTRO}`);
+	}
+
+	// Similar results then errors
+	for (const { requested, matches } of fuzzy_results) {
+		if (matches.length > 0) {
+			const match_list = matches.map((m) => `- title: ${m.title}, section: ${m.slug}`).join('\n');
+			parts.push(
+				`${matches.length} similar result${matches.length > 1 ? 's' : ''} for "${requested}":\n${match_list}`,
+			);
+		}
+		parts.push(`Section not found: "${requested}".`);
+	}
+
+	return parts.join('\n\n---\n\n');
 }
 
 export function get_documentation(server: SvelteMcp) {

packages/mcp-stdio/CHANGELOG.md

@@ -1,175 +1,187 @@
 # @sveltejs/mcp
 
+## 0.1.22
+
+### Patch Changes
+
+- fix: broaden checks for imported runes because LLMs are unhinged ([#185](https://github.com/sveltejs/ai-tools/pull/185))
+
+## 0.1.21
+
+### Patch Changes
+
+- feat: display similar result & error at the end ([#161](https://github.com/sveltejs/ai-tools/pull/161))
+
 ## 0.1.20
 
 ### Patch Changes
 
-- fix: turn off no-inspect in eslint for mcp ([`2245cb2`](https://github.com/sveltejs/mcp/commit/2245cb2dc9e2d217869b6a800795ce59ffb40c51))
+- fix: turn off no-inspect in eslint for mcp ([`2245cb2`](https://github.com/sveltejs/ai-tools/commit/2245cb2dc9e2d217869b6a800795ce59ffb40c51))
 
 ## 0.1.19
 
 ### Patch Changes
 
-- chore: update svelte ([`7447744`](https://github.com/sveltejs/mcp/commit/74477448cea44ec21684ea4d39f2c5c7133b5150))
+- chore: update svelte ([`7447744`](https://github.com/sveltejs/ai-tools/commit/74477448cea44ec21684ea4d39f2c5c7133b5150))
 
 ## 0.1.18
 
 ### Patch Changes
 
-- feat: expose playground link as MCP App ([#138](https://github.com/sveltejs/mcp/pull/138))
+- feat: expose playground link as MCP App ([#138](https://github.com/sveltejs/ai-tools/pull/138))
 
 ## 0.1.17
 
 ### Patch Changes
 
-- fix: add suggestion for snippets declared in script tag ([#132](https://github.com/sveltejs/mcp/pull/132))
+- fix: add suggestion for snippets declared in script tag ([#132](https://github.com/sveltejs/ai-tools/pull/132))
 
 ## 0.1.16
 
 ### Patch Changes
 
-- feat: expose tools as JS api + cli ([#128](https://github.com/sveltejs/mcp/pull/128))
+- feat: expose tools as JS api + cli ([#128](https://github.com/sveltejs/ai-tools/pull/128))
 
 ## 0.1.15
 
 ### Patch Changes
 
-- fix: server.json version + update publisher ([`9dfb4de`](https://github.com/sveltejs/mcp/commit/9dfb4dedb42837c40c4e660f0f816d7cf9081fc4))
+- fix: server.json version + update publisher ([`9dfb4de`](https://github.com/sveltejs/ai-tools/commit/9dfb4dedb42837c40c4e660f0f816d7cf9081fc4))
 
 ## 0.1.14
 
 ### Patch Changes
 
-- fix: improve prompt to reduce token usage ([#124](https://github.com/sveltejs/mcp/pull/124))
+- fix: improve prompt to reduce token usage ([#124](https://github.com/sveltejs/ai-tools/pull/124))
 
 ## 0.1.13
 
 ### Patch Changes
 
-- fix: revert name change and add title ([`98efa1e`](https://github.com/sveltejs/mcp/commit/98efa1e09ebcca7827b10dc6bc8e1699fc1e5171))
+- fix: revert name change and add title ([`98efa1e`](https://github.com/sveltejs/ai-tools/commit/98efa1e09ebcca7827b10dc6bc8e1699fc1e5171))
 
 ## 0.1.12
 
 ### Patch Changes
 
-- fix: update server name on mcp registry ([`60297b3`](https://github.com/sveltejs/mcp/commit/60297b3c49bf110b48908e61b5d5d902ea1bdf39))
+- fix: update server name on mcp registry ([`60297b3`](https://github.com/sveltejs/ai-tools/commit/60297b3c49bf110b48908e61b5d5d902ea1bdf39))
 
-- chore: update tmcp ([#99](https://github.com/sveltejs/mcp/pull/99))
+- chore: update tmcp ([#99](https://github.com/sveltejs/ai-tools/pull/99))
 
 ## 0.1.11
 
 ### Patch Changes
 
-- fix: add `async` parameter to `svelte-autofixer` ([#94](https://github.com/sveltejs/mcp/pull/94))
+- fix: add `async` parameter to `svelte-autofixer` ([#94](https://github.com/sveltejs/ai-tools/pull/94))
 
-- fix: install latest eslint svelte packages to support `$state.eager` ([`f6ce89f`](https://github.com/sveltejs/mcp/commit/f6ce89ff34faabc3d746a350ea347298ecfed2ec))
+- fix: install latest eslint svelte packages to support `$state.eager` ([`f6ce89f`](https://github.com/sveltejs/ai-tools/commit/f6ce89ff34faabc3d746a350ea347298ecfed2ec))
 
 ## 0.1.10
 
 ### Patch Changes
 
-- fix: add icons to `server.json` ([`02c951b`](https://github.com/sveltejs/mcp/commit/02c951baa86ac8103ffc158a202c06cfe6b15c01))
+- fix: add icons to `server.json` ([`02c951b`](https://github.com/sveltejs/ai-tools/commit/02c951baa86ac8103ffc158a202c06cfe6b15c01))
 
-- fix: add `preferred-frame-size` to UI resource ([`3fabcc0`](https://github.com/sveltejs/mcp/commit/3fabcc0f9bfee916c0deb9c2ffa931ed2168af2d))
+- fix: add `preferred-frame-size` to UI resource ([`3fabcc0`](https://github.com/sveltejs/ai-tools/commit/3fabcc0f9bfee916c0deb9c2ffa931ed2168af2d))
 
-- feat: support: `$state.eager` ([#90](https://github.com/sveltejs/mcp/pull/90))
+- feat: support: `$state.eager` ([#90](https://github.com/sveltejs/ai-tools/pull/90))
 
 ## 0.1.9
 
 ### Patch Changes
 
-- feat: return `mcp-ui` resource from `playground-link` ([#84](https://github.com/sveltejs/mcp/pull/84))
+- feat: return `mcp-ui` resource from `playground-link` ([#84](https://github.com/sveltejs/ai-tools/pull/84))
 
-- feat: suggest against js variables in css ([#78](https://github.com/sveltejs/mcp/pull/78))
+- feat: suggest against js variables in css ([#78](https://github.com/sveltejs/ai-tools/pull/78))
 
 ## 0.1.8
 
 ### Patch Changes
 
-- fix: upgrade registry publisher cli ([`5fa2baa`](https://github.com/sveltejs/mcp/commit/5fa2baa27009f01e0e4e91cee7984b81a81c1c29))
+- fix: upgrade registry publisher cli ([`5fa2baa`](https://github.com/sveltejs/ai-tools/commit/5fa2baa27009f01e0e4e91cee7984b81a81c1c29))
 
 ## 0.1.7
 
 ### Patch Changes
 
-- fix: use correct server schema version ([`579be87`](https://github.com/sveltejs/mcp/commit/579be877fa9f87f7f173450ca5bc918824d68282))
+- fix: use correct server schema version ([`579be87`](https://github.com/sveltejs/ai-tools/commit/579be877fa9f87f7f173450ca5bc918824d68282))
 
 ## 0.1.6
 
 ### Patch Changes
 
-- fix: prevent `imported_runes` suggestion from being added for libs that are not svelte ([`87af64f`](https://github.com/sveltejs/mcp/commit/87af64f4bc6d07b75640eb987a33655654363997))
+- fix: prevent `imported_runes` suggestion from being added for libs that are not svelte ([`87af64f`](https://github.com/sveltejs/ai-tools/commit/87af64f4bc6d07b75640eb987a33655654363997))
 
-- feat: add svelte icon and website url for mcp server ([#75](https://github.com/sveltejs/mcp/pull/75))
+- feat: add svelte icon and website url for mcp server ([#75](https://github.com/sveltejs/ai-tools/pull/75))
 
-- fix: use `data:` uri for local icon & add icons to tools + resources + prompts ([`cf62286`](https://github.com/sveltejs/mcp/commit/cf622869129382a97ad059bb1389f115907adc8e))
+- fix: use `data:` uri for local icon & add icons to tools + resources + prompts ([`cf62286`](https://github.com/sveltejs/ai-tools/commit/cf622869129382a97ad059bb1389f115907adc8e))
 
 ## 0.1.5
 
 ### Patch Changes
 
-- fix: widen `desired_svelte_version` validation to accommodate some clients ([`3b301d7`](https://github.com/sveltejs/mcp/commit/3b301d7d9c2f49758023408f505bc4ca79caaff4))
+- fix: widen `desired_svelte_version` validation to accommodate some clients ([`3b301d7`](https://github.com/sveltejs/ai-tools/commit/3b301d7d9c2f49758023408f505bc4ca79caaff4))
 
-- fix: minor tweaks to the prompt to allow for automatic sync ([#63](https://github.com/sveltejs/mcp/pull/63))
+- fix: minor tweaks to the prompt to allow for automatic sync ([#63](https://github.com/sveltejs/ai-tools/pull/63))
 
-- feat: `read_state_with_dollar` autofixer ([#66](https://github.com/sveltejs/mcp/pull/66))
+- feat: `read_state_with_dollar` autofixer ([#66](https://github.com/sveltejs/ai-tools/pull/66))
 
 ## 0.1.4
 
 ### Patch Changes
 
-- fix: pass secrets in action and update `mcpName` ([`044f098`](https://github.com/sveltejs/mcp/commit/044f0988b935fff39911a861a648dfb276f5831a))
+- fix: pass secrets in action and update `mcpName` ([`044f098`](https://github.com/sveltejs/ai-tools/commit/044f0988b935fff39911a861a648dfb276f5831a))
 
 ## 0.1.3
 
 ### Patch Changes
 
-- fix: use DNS to publish MCP ([#59](https://github.com/sveltejs/mcp/pull/59))
+- fix: use DNS to publish MCP ([#59](https://github.com/sveltejs/ai-tools/pull/59))
 
 ## 0.1.2
 
 ### Patch Changes
 
-- fix: publish to MCP registry (I really hope this time for real) ([`ef5241c`](https://github.com/sveltejs/mcp/commit/ef5241cbc204ad8bb84bde27db7c9d0a08280245))
+- fix: publish to MCP registry (I really hope this time for real) ([`ef5241c`](https://github.com/sveltejs/ai-tools/commit/ef5241cbc204ad8bb84bde27db7c9d0a08280245))
 
 ## 0.1.1
 
 ### Patch Changes
 
-- feat: publish mcp to registry (maybe for real this time) ([`132943d`](https://github.com/sveltejs/mcp/commit/132943db3b04dbbd322d08926c0880c990a61f5f))
+- feat: publish mcp to registry (maybe for real this time) ([`132943d`](https://github.com/sveltejs/ai-tools/commit/132943db3b04dbbd322d08926c0880c990a61f5f))
 
 ## 0.1.0
 
 ### Minor Changes
 
-- feat: publish to registry ([#45](https://github.com/sveltejs/mcp/pull/45))
+- feat: publish to registry ([#45](https://github.com/sveltejs/ai-tools/pull/45))
 
 ### Patch Changes
 
-- feat: add autofixer to tell the LLM to check if some function called in effect is assigning state #26 ([`73d7625`](https://github.com/sveltejs/mcp/commit/73d7625b3ca6a812ba91883ea668d80ff1e7c703))
+- feat: add autofixer to tell the LLM to check if some function called in effect is assigning state #26 ([`73d7625`](https://github.com/sveltejs/ai-tools/commit/73d7625b3ca6a812ba91883ea668d80ff1e7c703))
 
-- feat: add bind:this -> attachment and action -> attachment autofixer #20 ([`73d7625`](https://github.com/sveltejs/mcp/commit/73d7625b3ca6a812ba91883ea668d80ff1e7c703))
+- feat: add bind:this -> attachment and action -> attachment autofixer #20 ([`73d7625`](https://github.com/sveltejs/ai-tools/commit/73d7625b3ca6a812ba91883ea668d80ff1e7c703))
 
 ## 0.0.4
 
 ### Patch Changes
 
-- fix: allow TS `.svelte.ts` modules ([#49](https://github.com/sveltejs/mcp/pull/49))
+- fix: allow TS `.svelte.ts` modules ([#49](https://github.com/sveltejs/ai-tools/pull/49))
 
 ## 0.0.3
 
 ### Patch Changes
 
-- fix: check effect.pre in assign-in-effect ([#41](https://github.com/sveltejs/mcp/pull/41))
+- fix: check effect.pre in assign-in-effect ([#41](https://github.com/sveltejs/ai-tools/pull/41))
 
-- feat: `use_cases` documentation metadata ([#29](https://github.com/sveltejs/mcp/pull/29))
+- feat: `use_cases` documentation metadata ([#29](https://github.com/sveltejs/ai-tools/pull/29))
 
-- fix: change title names to allow for claude code to use the prompt ([`725f785`](https://github.com/sveltejs/mcp/commit/725f785766d04e9ed810a7c3f6bcfdb2e2b8234c))
+- fix: change title names to allow for claude code to use the prompt ([`725f785`](https://github.com/sveltejs/ai-tools/commit/725f785766d04e9ed810a7c3f6bcfdb2e2b8234c))
 
-- fix: enable doc tools ([`cb316c5`](https://github.com/sveltejs/mcp/commit/cb316c5b3ebc712946969d2d57236d159e796d58))
+- fix: enable doc tools ([`cb316c5`](https://github.com/sveltejs/ai-tools/commit/cb316c5b3ebc712946969d2d57236d159e796d58))
 
 ## 0.0.2
 
 ### Patch Changes
 
-- feat: latest version ([#25](https://github.com/sveltejs/mcp/pull/25))
+- feat: latest version ([#25](https://github.com/sveltejs/ai-tools/pull/25))

packages/mcp-stdio/package.json

@@ -1,19 +1,19 @@
 {
 	"name": "@sveltejs/mcp",
-	"version": "0.1.20",
+	"version": "0.1.22",
 	"type": "module",
 	"license": "MIT",
 	"mcpName": "dev.svelte/mcp",
-	"homepage": "https://github.com/sveltejs/mcp#readme",
+	"homepage": "https://github.com/sveltejs/ai-tools#readme",
 	"bugs": {
-		"url": "https://github.com/sveltejs/mcp/issues"
+		"url": "https://github.com/sveltejs/ai-tools/issues"
 	},
 	"bin": {
 		"svelte-mcp": "./dist/index.mjs"
 	},
 	"repository": {
 		"type": "git",
-		"url": "git+https://github.com/sveltejs/mcp.git",
+		"url": "git+https://github.com/sveltejs/ai-tools.git",
 		"path": "packages/mcp-stdio"
 	},
 	"files": [

packages/mcp-stdio/server.json

@@ -5,11 +5,11 @@
 	"description": "The official Svelte MCP server providing docs and autofixing tools for Svelte development",
 	"repository": {
 		"id": "1054419133",
-		"url": "https://github.com/sveltejs/mcp",
+		"url": "https://github.com/sveltejs/ai-tools",
 		"subfolder": "packages/mcp-stdio",
 		"source": "github"
 	},
-	"version": "0.1.20",
+	"version": "0.1.22",
 	"websiteUrl": "https://svelte.dev/docs/mcp/overview",
 	"icons": [
 		{
@@ -25,7 +25,7 @@
 		{
 			"registryType": "npm",
 			"identifier": "@sveltejs/mcp",
-			"version": "0.1.20",
+			"version": "0.1.22",
 			"runtimeHint": "npx",
 			"transport": {
 				"type": "stdio"

packages/opencode/CHANGELOG.md

@@ -1,31 +1,67 @@
 # @sveltejs/opencode
 
+## 0.1.7
+
+### Patch Changes
+
+- fix: import `ts` files directly ([#190](https://github.com/sveltejs/ai-tools/pull/190))
+
+## 0.1.6
+
+### Patch Changes
+
+- chore: sync skills from svelte.dev ([#178](https://github.com/sveltejs/ai-tools/pull/178))
+
+- fix: update svelte-file-editor agent to use proper name ([#183](https://github.com/sveltejs/ai-tools/pull/183))
+
+## 0.1.5
+
+### Patch Changes
+
+- fix: merge user-configured svelte-file-editor agent settings ([#176](https://github.com/sveltejs/ai-tools/pull/176))
+
+- feat(opencode): mcp enabled option is passed to opencode ([#171](https://github.com/sveltejs/ai-tools/pull/171))
+
+- feat: allow enabling a specific skill in opencode plugin ([#174](https://github.com/sveltejs/ai-tools/pull/174))
+
+## 0.1.4
+
+### Patch Changes
+
+- feat: `svelte-core-bestpractices` skill ([#162](https://github.com/sveltejs/ai-tools/pull/162))
+
+## 0.1.3
+
+### Patch Changes
+
+- fix: better subagent instructions to use MCP or skill ([#163](https://github.com/sveltejs/ai-tools/pull/163))
+
 ## 0.1.2
 
 ### Patch Changes
 
-- feat: allow for local opencode config ([#156](https://github.com/sveltejs/mcp/pull/156))
+- feat: allow for local opencode config ([#156](https://github.com/sveltejs/ai-tools/pull/156))
 
 ## 0.1.1
 
 ### Patch Changes
 
-- fix: actually push skills to right config path ([`c2c1b3e`](https://github.com/sveltejs/mcp/commit/c2c1b3e5e788b14eea17cd37a83ca55433cc4072))
+- fix: actually push skills to right config path ([`c2c1b3e`](https://github.com/sveltejs/ai-tools/commit/c2c1b3e5e788b14eea17cd37a83ca55433cc4072))
 
 ## 0.1.0
 
 ### Minor Changes
 
-- feat: distribute skills through opencode plugin ([#151](https://github.com/sveltejs/mcp/pull/151))
+- feat: distribute skills through opencode plugin ([#151](https://github.com/sveltejs/ai-tools/pull/151))
 
 ## 0.0.3
 
 ### Patch Changes
 
-- chore: add README to opencode plugin ([`71295bc`](https://github.com/sveltejs/mcp/commit/71295bc11fb7bac6703e655f5fddead29967353c))
+- chore: add README to opencode plugin ([`71295bc`](https://github.com/sveltejs/ai-tools/commit/71295bc11fb7bac6703e655f5fddead29967353c))
 
 ## 0.0.2
 
 ### Patch Changes
 
-- fix: show toast after a few seconds to avoid race condition ([`57e2d1d`](https://github.com/sveltejs/mcp/commit/57e2d1def1f5590d0a3dd6d269ac39f6397ffecf))
+- fix: show toast after a few seconds to avoid race condition ([`57e2d1d`](https://github.com/sveltejs/ai-tools/commit/57e2d1def1f5590d0a3dd6d269ac39f6397ffecf))

packages/opencode/README.md

@@ -36,39 +36,76 @@ The plugin injects instructions that teach the agent how to effectively use the
 
 ## Configuration
 
-The default configuration:
+Create `svelte.json` to customize how the plugin configures MCP, the Svelte subagent, instructions, and skills.
 
 ```json
 {
-	"$schema": "https://raw.githubusercontent.com/sveltejs/mcp/refs/heads/main/packages/opencode/schema.json",
+	"$schema": "https://svelte.dev/opencode/schema.json",
 	"mcp": {
 		"type": "remote",
 		"enabled": true
 	},
 	"subagent": {
-		"enabled": true
+		"enabled": true,
+		"agents": {
+			"svelte-file-editor": {
+				"model": "anthropic/claude-sonnet-4-20250514",
+				"temperature": 0.7,
+				"top_p": 0.9,
+				"maxSteps": 20
+			}
+		}
 	},
 	"instructions": {
 		"enabled": true
+	},
+	"skills": {
+		"enabled": ["svelte-code-writer", "svelte-core-bestpractices"]
 	}
 }
 ```
 
+### Defaults
+
+If omitted, the plugin uses these defaults:
+
+- `mcp.type`: `"remote"`
+- `mcp.enabled`: `true`
+- `subagent.enabled`: `true`
+- `subagent.agents`: `{}`
+- `instructions.enabled`: `true`
+- `skills.enabled`: `true`
+
 ### Configuration Options
 
-| Option                 | Type                    | Default    | Description                                                                      |
-| ---------------------- | ----------------------- | ---------- | -------------------------------------------------------------------------------- |
-| `mcp.type`             | `"remote"` \| `"local"` | `"remote"` | Use the remote server at `mcp.svelte.dev` or run locally via `npx @sveltejs/mcp` |
-| `mcp.enabled`          | `boolean`               | `true`     | Enable/disable the MCP server                                                    |
-| `subagent.enabled`     | `boolean`               | `true`     | Enable/disable the Svelte file editor subagent                                   |
-| `instructions.enabled` | `boolean`               | `true`     | Enable/disable agent instructions injection                                      |
+| Option                                           | Type                  | Default    | Description                                                                                    |
+| ------------------------------------------------ | --------------------- | ---------- | ---------------------------------------------------------------------------------------------- |
+| `mcp.type`                                       | `"remote" \| "local"` | `"remote"` | Use `https://mcp.svelte.dev/mcp` (`remote`) or run `@sveltejs/mcp` via `npx` (`local`).        |
+| `mcp.enabled`                                    | `boolean`             | `true`     | Enable or disable the Svelte MCP server entry.                                                 |
+| `subagent.enabled`                               | `boolean`             | `true`     | Enable or disable registration of the `svelte-file-editor` subagent.                           |
+| `subagent.agents.svelte-file-editor.model`       | `string`              | main agent | Override the model used by the Svelte file editor subagent.                                    |
+| `subagent.agents.svelte-file-editor.temperature` | `number`              | unset      | Set temperature for the subagent.                                                              |
+| `subagent.agents.svelte-file-editor.top_p`       | `number`              | unset      | Set top-p sampling for the subagent.                                                           |
+| `subagent.agents.svelte-file-editor.maxSteps`    | `number`              | unlimited  | Limit the number of steps the subagent can execute.                                            |
+| `instructions.enabled`                           | `boolean`             | `true`     | Enable or disable automatic instruction-file injection.                                        |
+| `skills.enabled`                                 | `boolean \| string[]` | `true`     | Enable all skills (`true`), disable all skills (`false`), or enable only specific skill names. |
 
-### Config File Location
+### Supported Skill Names
 
-Place your configuration at one of these locations:
+When using `skills.enabled` as an array, these built-in names are currently available:
 
-- `~/.config/opencode/svelte.json` (global)
-- `$OPENCODE_CONFIG_DIR/svelte.json` (if `OPENCODE_CONFIG_DIR` is set, takes priority)
+- `svelte-code-writer`
+- `svelte-core-bestpractices`
+
+### Config File Locations and Precedence
+
+The plugin reads from these files (lowest priority first, highest priority last):
+
+- `~/.config/opencode/svelte.json`
+- `$OPENCODE_CONFIG_DIR/svelte.json` (when `OPENCODE_CONFIG_DIR` is set)
+- `.opencode/svelte.json` in the current project
+
+If the same key is defined in multiple files, the later location overrides earlier ones.
 
 ## License
 

packages/opencode/agents.ts

@@ -0,0 +1,11 @@
+// This file is auto-generated by scripts/sync-opencode-plugin.ts
+// Do not edit manually — edit the markdown files in tools/agents/ instead.
+
+export const agents = {
+	'svelte-file-editor': {
+		description:
+			'Specialized Svelte 5 code editor. MUST BE USED PROACTIVELY when creating, editing, or reviewing any .svelte file or .svelte.ts/.svelte.js module and MUST use the tools from the MCP server or the `svelte-file-editor` skill if they are available. Fetches relevant documentation and validates code using the Svelte MCP server tools.',
+		prompt:
+			"You are a Svelte 5 expert responsible for writing, editing, and validating Svelte components and modules. You have access to the Svelte MCP server which provides documentation and code analysis tools. Always use the tools from the svelte MCP server to fetch documentation with `get_documentation` and validating the code with `svelte_autofixer`. If the autofixer returns any issue or suggestions try to solve them.\n\nIf the MCP tools are not available you can use the `svelte-code-writer` skill to learn how to use the `@sveltejs/mcp` cli to access the same tools.\n\nIf the skill is not available you can run `npx @sveltejs/mcp@latest -y --help` to learn how to use it.\n\n## Available MCP Tools\n\n### 1. list-sections\n\nLists all available Svelte 5 and SvelteKit documentation sections with titles and paths. Use this first to discover what documentation is available.\n\n### 2. get-documentation\n\nRetrieves full documentation for specified sections. Accepts a single section name or an array of section names. Use after `list-sections` to fetch relevant docs for the task at hand.\n\n**Example sections:** `$state`, `$derived`, `$effect`, `$props`, `$bindable`, `snippets`, `routing`, `load functions`\n\n### 3. svelte-autofixer\n\nAnalyzes Svelte code and returns suggestions to fix issues. Pass the component code directly to this tool. It will detect common mistakes like:\n\n- Using `$effect` instead of `$derived` for computations\n- Missing cleanup in effects\n- Svelte 4 syntax (`on:click`, `export let`, `<slot>`)\n- Missing keys in `{#each}` blocks\n- And more\n\n## Workflow\n\nWhen invoked to work on a Svelte file:\n\n### 1. Gather Context (if needed)\n\nIf you're uncertain about Svelte 5 syntax or patterns, use the MCP tools:\n\n1. Call `list-sections` to see available documentation\n2. Call `get-documentation` with relevant section names\n\n### 2. Read the Target File\n\nRead the file to understand the current implementation.\n\n### 3. Make Changes\n\nApply edits following Svelte 5 best practices:\n\n### 4. Validate Changes\n\nAfter editing, ALWAYS call `svelte-autofixer` with the updated code to check for issues.\n\n### 5. Fix Any Issues\n\nIf the autofixer reports problems, fix them and re-validate until no issues remain.\n\n## Output Format\n\nAfter completing your work, provide:\n\n1. Summary of changes made\n2. Any issues found and fixed by the autofixer\n3. Recommendations for further improvements (if any)",
+	},
+} as const;

packages/opencode/config.ts

@@ -4,6 +4,28 @@ import { homedir } from 'os';
 import { join } from 'path';
 import * as v from 'valibot';
 
+// Schema for individual agent configuration
+const agent_config_schema = v.object({
+	model: v.pipe(
+		v.optional(v.string()),
+		v.description('Model identifier for the agent (e.g., "anthropic/claude-sonnet-4-20250514")'),
+	),
+	temperature: v.pipe(
+		v.optional(v.number()),
+		v.description('Temperature setting for the agent (e.g., 0.7)'),
+	),
+	top_p: v.pipe(
+		v.optional(v.number()),
+		v.description(
+			'Control response diversity with the top_p option. Alternative to temperature for controlling randomness.',
+		),
+	),
+	maxSteps: v.pipe(
+		v.optional(v.number()),
+		v.description('Maximum number of steps the agent can take (e.g., 10)'),
+	),
+});
+
 const default_config = {
 	mcp: {
 		type: 'remote' as 'remote' | 'local',
@@ -11,36 +33,61 @@ const default_config = {
 	},
 	subagent: {
 		enabled: true,
+		agents: {} as Record<string, v.InferInput<typeof agent_config_schema>>,
 	},
 	instructions: {
 		enabled: true,
 	},
 	skills: {
-		enabled: true,
+		enabled: true as boolean | string[],
 	},
 };
 
 export const config_schema = v.object({
-	mcp: v.optional(
-		v.object({
-			type: v.optional(v.picklist(['remote', 'local'])),
-			enabled: v.optional(v.boolean()),
-		}),
+	mcp: v.pipe(
+		v.optional(
+			v.object({
+				type: v.optional(v.picklist(['remote', 'local'])),
+				enabled: v.optional(v.boolean()),
+			}),
+		),
+		v.description(
+			"Configuration for the MCP. You can chose if it should be enabled or not and the transport to use 'remote' (default) and 'local'.",
+		),
 	),
-	subagent: v.optional(
-		v.object({
-			enabled: v.optional(v.boolean()),
-		}),
+	subagent: v.pipe(
+		v.optional(
+			v.object({
+				enabled: v.optional(v.boolean()),
+				agents: v.optional(v.record(v.string(), agent_config_schema)),
+			}),
+		),
+		v.description('Configuration for the subagent. You can choose if it should be enabled or not.'),
 	),
-	instructions: v.optional(
-		v.object({
-			enabled: v.optional(v.boolean()),
-		}),
+	instructions: v.pipe(
+		v.optional(
+			v.object({
+				enabled: v.optional(v.boolean()),
+			}),
+		),
+		v.description(
+			'Configuration for the automatic AGENTS.md injection. You can choose if it should be enabled or not.',
+		),
 	),
-	skills: v.optional(
-		v.object({
-			enabled: v.optional(v.boolean()),
-		}),
+	skills: v.pipe(
+		v.optional(
+			v.object({
+				enabled: v.pipe(
+					v.optional(v.union([v.boolean(), v.array(v.string())])),
+					v.description(
+						'It can be either a boolean or an array containing the skills that you want to enable',
+					),
+				),
+			}),
+		),
+		v.description(
+			'Configuration for the skills. You can choose if it they should be enabled or not, or specify an array of skill names to enable only specific skills.',
+		),
 	),
 });
 
@@ -112,8 +159,12 @@ function merge_with_defaults(user_config: Partial<McpConfig>): McpConfig {
 			...user_config.mcp,
 		},
 		subagent: {
-			...default_config.subagent,
+			enabled: default_config.subagent.enabled,
 			...user_config.subagent,
+			agents: {
+				...default_config.subagent.agents,
+				...user_config.subagent?.agents,
+			},
 		},
 		instructions: {
 			...default_config.instructions,
@@ -151,7 +202,11 @@ export function get_mcp_config(ctx: PluginInput) {
 			if (parsed.success) {
 				merged = {
 					mcp: { ...merged.mcp, ...parsed.output.mcp },
-					subagent: { ...merged.subagent, ...parsed.output.subagent },
+					subagent: {
+						...merged.subagent,
+						...parsed.output.subagent,
+						agents: { ...merged.subagent?.agents, ...parsed.output.subagent?.agents },
+					},
 					instructions: { ...merged.instructions, ...parsed.output.instructions },
 					skills: { ...merged.skills, ...parsed.output.skills },
 				};

packages/opencode/index.ts

@@ -2,7 +2,8 @@ import type { Plugin } from '@opencode-ai/plugin';
 import { readdir } from 'node:fs/promises';
 import { dirname, join } from 'node:path';
 import { fileURLToPath } from 'node:url';
-import { get_mcp_config } from './config.js';
+import { agents } from './agents.ts';
+import { get_mcp_config } from './config.ts';
 
 const current_dir = dirname(fileURLToPath(import.meta.url));
 
@@ -39,43 +40,77 @@ export const svelte_plugin: Plugin = async (ctx) => {
 				input.instructions.push(...instructions_paths.map((file) => join(instructions_dir, file)));
 			}
 
-			if (mcp_config.skills?.enabled !== false) {
+			const skills_enabled = mcp_config.skills?.enabled;
+			if (skills_enabled !== false) {
 				const skills_dir = join(current_dir, 'skills');
-				// @ts-expect-error -- skills is a new opencode feature
-				input.skills.paths.push(skills_dir);
+				if (Array.isArray(skills_enabled)) {
+					// only add specific skill directories by name
+					for (const skill_name of skills_enabled) {
+						const skill_path = join(skills_dir, skill_name);
+						// @ts-expect-error -- skills is a new opencode feature
+						input.skills.paths.push(skill_path);
+					}
+				} else {
+					// @ts-expect-error -- skills is a new opencode feature
+					input.skills.paths.push(skills_dir);
+				}
 			}
 
 			// if the user doesn't have the MCP server already we add one based on config
-			if (!input.mcp[svelte_mcp_name] && mcp_config.mcp?.enabled !== false) {
+			if (!input.mcp[svelte_mcp_name]) {
 				if (mcp_config.mcp?.type === 'remote') {
 					input.mcp[svelte_mcp_name] = {
 						type: 'remote',
 						url: 'https://mcp.svelte.dev/mcp',
+						enabled: mcp_config.mcp?.enabled ?? true,
 					};
 				} else {
 					input.mcp[svelte_mcp_name] = {
 						type: 'local',
 						command: ['npx', '-y', '@sveltejs/mcp'],
+						enabled: mcp_config.mcp?.enabled ?? true,
 					};
 				}
 			}
 			if (mcp_config.subagent?.enabled !== false) {
-				// we add the editor subagent that will be used when editing Svelte files to prevent wasting context on the main agent
-				input.agent['svelte-file-editor'] = {
-					color: '#ff3e00',
-					mode: 'subagent',
-					prompt: `You are a specialized Svelte coder. Always use the tools from the svelte MCP server to fetch documentation with \`get_documentation\` and validating the code with \`svelte_autofixer\`. If the autofixer returns any issue or suggestions solve them before summarizing the changes for the main agent.`,
-					description:
-						'Specialized Svelte 5 code editor. MUST BE USED PROACTIVELY when creating, editing, or reviewing any .svelte file or .svelte.ts/.svelte.js module and MUST use the tools from the MCP server. Fetches relevant documentation and validates code using the Svelte MCP server tools.',
-					permission: {
-						bash: 'ask',
-						edit: 'allow',
-						webfetch: 'ask',
-					},
-					tools: {
-						[`${svelte_mcp_name}_*`]: true,
-					},
-				};
+				for (const [agent_name, agent_data] of Object.entries(agents)) {
+					// we add the editor subagent that will be used when editing Svelte files to prevent wasting context on the main agent
+					const default_config: (typeof input.agent)[string] = {
+						color: '#ff3e00',
+						mode: 'subagent',
+						prompt: agent_data.prompt,
+						description: agent_data.description,
+						permission: {
+							bash: 'ask',
+							edit: 'allow',
+							webfetch: 'ask',
+						},
+						tools: {
+							[`${svelte_mcp_name}_*`]: true,
+						},
+					};
+
+					// Get per-agent config from svelte.json (if any)
+					const agent_config = mcp_config.subagent?.agents?.[agent_name];
+
+					// Configure agent from svelte.json only
+					// Priority: svelte.json agent config > defaults
+					input.agent[agent_name] = {
+						...default_config,
+						...(agent_config?.model !== undefined && {
+							model: agent_config.model,
+						}),
+						...(agent_config?.temperature !== undefined && {
+							temperature: agent_config.temperature,
+						}),
+						...(agent_config?.maxSteps !== undefined && {
+							maxSteps: agent_config.maxSteps,
+						}),
+						...(agent_config?.top_p !== undefined && {
+							top_p: agent_config.top_p,
+						}),
+					};
+				}
 			}
 		},
 	};

packages/opencode/package.json

@@ -1,11 +1,11 @@
 {
 	"name": "@sveltejs/opencode",
-	"version": "0.1.2",
+	"version": "0.1.7",
 	"type": "module",
 	"license": "MIT",
-	"homepage": "https://github.com/sveltejs/mcp#readme",
+	"homepage": "https://github.com/sveltejs/ai-tools#readme",
 	"bugs": {
-		"url": "https://github.com/sveltejs/mcp/issues"
+		"url": "https://github.com/sveltejs/ai-tools/issues"
 	},
 	"scripts": {
 		"check": "tsc --noEmit",
@@ -14,12 +14,13 @@
 	"files": [
 		"index.ts",
 		"config.ts",
+		"agents.ts",
 		"instructions",
 		"skills"
 	],
 	"repository": {
 		"type": "git",
-		"url": "git+https://github.com/sveltejs/mcp.git",
+		"url": "git+https://github.com/sveltejs/ai-tools.git",
 		"path": "packages/opencode"
 	},
 	"publishConfig": {

packages/opencode/schema.json

@@ -14,16 +14,55 @@
 					"type": "boolean"
 				}
 			},
-			"required": []
+			"required": [],
+			"description": "Configuration for the MCP. You can chose if it should be enabled or not and the transport to use 'remote' (default) and 'local'."
 		},
 		"subagent": {
 			"type": "object",
 			"properties": {
 				"enabled": {
 					"type": "boolean"
+				},
+				"agents": {
+					"type": "object",
+					"propertyNames": {
+						"anyOf": [
+							{
+								"enum": [
+									"svelte-file-editor"
+								]
+							},
+							{
+								"type": "string"
+							}
+						]
+					},
+					"additionalProperties": {
+						"type": "object",
+						"properties": {
+							"model": {
+								"type": "string",
+								"description": "Model identifier for the agent (e.g., \"anthropic/claude-sonnet-4-20250514\")"
+							},
+							"temperature": {
+								"type": "number",
+								"description": "Temperature setting for the agent (e.g., 0.7)"
+							},
+							"top_p": {
+								"type": "number",
+								"description": "Control response diversity with the top_p option. Alternative to temperature for controlling randomness."
+							},
+							"maxSteps": {
+								"type": "number",
+								"description": "Maximum number of steps the agent can take (e.g., 10)"
+							}
+						},
+						"required": []
+					}
 				}
 			},
-			"required": []
+			"required": [],
+			"description": "Configuration for the subagent. You can choose if it should be enabled or not."
 		},
 		"instructions": {
 			"type": "object",
@@ -32,16 +71,39 @@
 					"type": "boolean"
 				}
 			},
-			"required": []
+			"required": [],
+			"description": "Configuration for the automatic AGENTS.md injection. You can choose if it should be enabled or not."
 		},
 		"skills": {
 			"type": "object",
 			"properties": {
 				"enabled": {
-					"type": "boolean"
+					"anyOf": [
+						{
+							"type": "boolean"
+						},
+						{
+							"type": "array",
+							"items": {
+								"anyOf": [
+									{
+										"enum": [
+											"svelte-code-writer",
+											"svelte-core-bestpractices"
+										]
+									},
+									{
+										"type": "string"
+									}
+								]
+							}
+						}
+					],
+					"description": "It can be either a boolean or an array containing the skills that you want to enable"
 				}
 			},
-			"required": []
+			"required": [],
+			"description": "Configuration for the skills. You can choose if it they should be enabled or not, or specify an array of skill names to enable only specific skills."
 		}
 	},
 	"required": [],

packages/opencode/scripts/generate-schema.ts

@@ -3,6 +3,58 @@ import { config_schema } from '../config.js';
 import fs from 'node:fs';
 import path from 'node:path';
 
-const json_schema = toJsonSchema(config_schema);
+// Read agent names from tools/agents/*.md files
+function get_agent_names(agents_dir: string) {
+	if (!fs.existsSync(agents_dir)) return [];
+	return fs
+		.readdirSync(agents_dir, { withFileTypes: true })
+		.filter((entry) => entry.isFile() && entry.name.endsWith('.md'))
+		.map((entry) => entry.name.replace(/\.md$/, ''));
+}
+
+function get_skill_names(skills_dir: string) {
+	if (!fs.existsSync(skills_dir)) return [];
+	return fs
+		.readdirSync(skills_dir, { withFileTypes: true })
+		.filter((entry) => entry.isDirectory())
+		.map((entry) => entry.name);
+}
+
+const skills_dir = path.resolve('./skills');
+const skill_names = get_skill_names(skills_dir);
+const schema = config_schema;
+const json_schema = toJsonSchema(schema);
+
+// Post-process: inject skill name suggestions into the items schema.
+// This is the JSON Schema equivalent of `"a" | "b" | (string & {})` —
+// editors will autocomplete the known names but any string is still valid.
+if (skill_names.length > 0) {
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	const enabled = (json_schema as any).properties?.skills?.properties?.enabled;
+	if (enabled?.anyOf) {
+		const array_branch = enabled.anyOf.find((s: Record<string, unknown>) => s.type === 'array');
+		if (array_branch) {
+			array_branch.items = {
+				anyOf: [{ enum: skill_names }, { type: 'string' }],
+			};
+		}
+	}
+}
+
+// Post-process: inject known agent names for intellisense
+// This is the JSON Schema equivalent of `"a" | "b" | (string & {})` —
+// editors will autocomplete the known names but any string is still valid.
+const agents_dir = path.resolve('../../tools/agents');
+const agent_names = get_agent_names(agents_dir);
+
+if (agent_names.length > 0) {
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	const agents = (json_schema as any).properties?.subagent?.properties?.agents;
+	if (agents) {
+		agents.propertyNames = {
+			anyOf: [{ enum: agent_names }, { type: 'string' }],
+		};
+	}
+}
 
 fs.writeFileSync(path.resolve('./schema.json'), JSON.stringify(json_schema, null, '\t'));

packages/opencode/skills/svelte-core-bestpractices/SKILL.md

@@ -0,0 +1,176 @@
+---
+name: svelte-core-bestpractices
+description: Guidance on writing fast, robust, modern Svelte code. Load this skill whenever in a Svelte project and asked to write/edit or analyze a Svelte component or module. Covers reactivity, event handling, styling, integration with libraries and more.
+---
+
+## `$state`
+
+Only use the `$state` rune for variables that should be _reactive_ — in other words, variables that cause an `$effect`, `$derived` or template expression to update. Everything else can be a normal variable.
+
+Objects and arrays (`$state({...})` or `$state([...])`) are made deeply reactive, meaning mutation will trigger updates. This has a trade-off: in exchange for fine-grained reactivity, the objects must be proxied, which has performance overhead. In cases where you're dealing with large objects that are only ever reassigned (rather than mutated), use `$state.raw` instead. This is often the case with API responses, for example.
+
+## `$derived`
+
+To compute something from state, use `$derived` rather than `$effect`:
+
+```js
+// do this
+let square = $derived(num * num);
+
+// don't do this
+let square;
+
+$effect(() => {
+	square = num * num;
+});
+```
+
+> [!NOTE] `$derived` is given an expression, _not_ a function. If you need to use a function (because the expression is complex, for example) use `$derived.by`.
+
+Deriveds are writable — you can assign to them, just like `$state`, except that they will re-evaluate when their expression changes.
+
+If the derived expression is an object or array, it will be returned as-is — it is _not_ made deeply reactive. You can, however, use `$state` inside `$derived.by` in the rare cases that you need this.
+
+## `$effect`
+
+Effects are an escape hatch and should mostly be avoided. In particular, avoid updating state inside effects.
+
+- If you need to sync state to an external library such as D3, it is often neater to use [`{@attach ...}`](references/@attach.md)
+- If you need to run some code in response to user interaction, put the code directly in an event handler or use a [function binding](references/bind.md) as appropriate
+- If you need to log values for debugging purposes, use [`$inspect`](references/$inspect.md)
+- If you need to observe something external to Svelte, use [`createSubscriber`](references/svelte-reactivity.md)
+
+Never wrap the contents of an effect in `if (browser) {...}` or similar — effects do not run on the server.
+
+## `$props`
+
+Treat props as though they will change. For example, values that depend on props should usually use `$derived`:
+
+```js
+// @errors: 2451
+let { type } = $props();
+
+// do this
+let color = $derived(type === 'danger' ? 'red' : 'green');
+
+// don't do this — `color` will not update if `type` changes
+let color = type === 'danger' ? 'red' : 'green';
+```
+
+## `$inspect.trace`
+
+`$inspect.trace` is a debugging tool for reactivity. If something is not updating properly or running more than it should you can add `$inspect.trace(label)` as the first line of an `$effect` or `$derived.by` (or any function they call) to trace their dependencies and discover which one triggered an update.
+
+## Events
+
+Any element attribute starting with `on` is treated as an event listener:
+
+```svelte
+<button onclick={() => {...}}>click me</button>
+
+<!-- attribute shorthand also works -->
+<button {onclick}>...</button>
+
+<!-- so do spread attributes -->
+<button {...props}>...</button>
+```
+
+If you need to attach listeners to `window` or `document` you can use `<svelte:window>` and `<svelte:document>`:
+
+```svelte
+<svelte:window onkeydown={...} />
+<svelte:document onvisibilitychange={...} />
+```
+
+Avoid using `onMount` or `$effect` for this.
+
+## Snippets
+
+[Snippets](references/snippet.md) are a way to define reusable chunks of markup that can be instantiated with the [`{@render ...}`](references/@render.md) tag, or passed to components as props. They must be declared within the template.
+
+```svelte
+{#snippet greeting(name)}
+	<p>hello {name}!</p>
+{/snippet}
+
+{@render greeting('world')}
+```
+
+> [!NOTE] Snippets declared at the top level of a component (i.e. not inside elements or blocks) can be referenced inside `<script>`. A snippet that doesn't reference component state is also available in a `<script module>`, in which case it can be exported for use by other components.
+
+## Each blocks
+
+Prefer to use [keyed each blocks](references/each.md) — this improves performance by allowing Svelte to surgically insert or remove items rather than updating the DOM belonging to existing items.
+
+> [!NOTE] The key _must_ uniquely identify the object. Do not use the index as a key.
+
+Avoid destructuring if you need to mutate the item (with something like `bind:value={item.count}`, for example).
+
+## Using JavaScript variables in CSS
+
+If you have a JS variable that you want to use inside CSS you can set a CSS custom property with the `style:` directive.
+
+```svelte
+<div style:--columns={columns}>...</div>
+```
+
+You can then reference `var(--columns)` inside the component's `<style>`.
+
+## Styling child components
+
+The CSS in a component's `<style>` is scoped to that component. If a parent component needs to control the child's styles, the preferred way is to use CSS custom properties:
+
+```svelte
+<!-- Parent.svelte -->
+<Child --color="red" />
+
+<!-- Child.svelte -->
+<h1>Hello</h1>
+
+<style>
+	h1 {
+		color: var(--color);
+	}
+</style>
+```
+
+If this is impossible (for example, the child component comes from a library) you can use `:global` to override styles:
+
+```svelte
+<div>
+	<Child />
+</div>
+
+<style>
+	div :global {
+		h1 {
+			color: red;
+		}
+	}
+</style>
+```
+
+## Context
+
+Consider using context instead of declaring state in a shared module. This will scope the state to the part of the app that needs it, and eliminate the possibility of it leaking between users when server-side rendering.
+
+Use `createContext` rather than `setContext` and `getContext`, as it provides type safety.
+
+## Async Svelte
+
+If using version 5.36 or higher, you can use [await expressions](references/await-expressions.md) and [hydratable](references/hydratable.md) to use promises directly inside components. Note that these require the `experimental.async` option to be enabled in `svelte.config.js` as they are not yet considered fully stable.
+
+## Avoid legacy features
+
+Always use runes mode for new code, and avoid features that have more modern replacements:
+
+- use `$state` instead of implicit reactivity (e.g. `let count = 0; count += 1`)
+- use `$derived` and `$effect` instead of `$:` assignments and statements (but only use effects when there is no better solution)
+- use `$props` instead of `export let`, `$$props` and `$$restProps`
+- use `onclick={...}` instead of `on:click={...}`
+- use `{#snippet ...}` and `{@render ...}` instead of `<slot>` and `$$slots` and `<svelte:fragment>`
+- use `<DynamicComponent>` instead of `<svelte:component this={DynamicComponent}>`
+- use `import Self from './ThisComponent.svelte'` and `<Self>` instead of `<svelte:self>`
+- use classes with `$state` fields to share reactivity between components, instead of using stores
+- use `{@attach ...}` instead of `use:action`
+- use clsx-style arrays and objects in `class` attributes, instead of the `class:` directive

packages/opencode/skills/svelte-core-bestpractices/references/$inspect.md

@@ -0,0 +1,53 @@
+> [!NOTE] `$inspect` only works during development. In a production build it becomes a noop.
+
+The `$inspect` rune is roughly equivalent to `console.log`, with the exception that it will re-run whenever its argument changes. `$inspect` tracks reactive state deeply, meaning that updating something inside an object or array using fine-grained reactivity will cause it to re-fire (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+	let message = $state('hello');
+
+	$inspect(count, message); // will console.log when `count` or `message` change
+</script>
+
+<button onclick={() => count++}>Increment</button>
+<input bind:value={message} />
+```
+
+On updates, a stack trace will be printed, making it easy to find the origin of a state change (unless you're in the playground, due to technical limitations).
+
+## $inspect(...).with
+
+`$inspect` returns a property `with`, which you can invoke with a callback, which will then be invoked instead of `console.log`. The first argument to the callback is either `"init"` or `"update"`; subsequent arguments are the values passed to `$inspect` (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+
+	$inspect(count).with((type, count) => {
+		if (type === 'update') {
+			debugger; // or `console.trace`, or whatever you want
+		}
+	});
+</script>
+
+<button onclick={() => count++}>Increment</button>
+```
+
+## $inspect.trace(...)
+
+This rune, added in 5.14, causes the surrounding function to be _traced_ in development. Any time the function re-runs as part of an [effect]($effect) or a [derived]($derived), information will be printed to the console about which pieces of reactive state caused the effect to fire.
+
+```svelte
+<script>
+	import { doSomeWork } from './elsewhere';
+
+	$effect(() => {
+		+++// $inspect.trace must be the first statement of a function body+++
+		+++$inspect.trace();+++
+		doSomeWork();
+	});
+</script>
+```
+
+`$inspect.trace` takes an optional first argument which will be used as the label.

packages/opencode/skills/svelte-core-bestpractices/references/@attach.md

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+Attachments are functions that run in an [effect]($effect) when an element is mounted to the DOM or when [state]($state) read inside the function updates.
+
+Optionally, they can return a function that is called before the attachment re-runs, or after the element is later removed from the DOM.
+
+> [!NOTE]
+> Attachments are available in Svelte 5.29 and newer.
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	/** @type {import('svelte/attachments').Attachment} */
+	function myAttachment(element) {
+		console.log(element.nodeName); // 'DIV'
+
+		return () => {
+			console.log('cleaning up');
+		};
+	}
+</script>
+
+<div {@attach myAttachment}>...</div>
+```
+
+An element can have any number of attachments.
+
+## Attachment factories
+
+A useful pattern is for a function, such as `tooltip` in this example, to _return_ an attachment (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<button {@attach tooltip(content)}> Hover me </button>
+```
+
+Since the `tooltip(content)` expression runs inside an [effect]($effect), the attachment will be destroyed and recreated whenever `content` changes. The same thing would happen for any state read _inside_ the attachment function when it first runs. (If this isn't what you want, see [Controlling when attachments re-run](#Controlling-when-attachments-re-run).)
+
+## Inline attachments
+
+Attachments can also be created inline (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<canvas
+	width={32}
+	height={32}
+	{@attach (canvas) => {
+		const context = canvas.getContext('2d');
+
+		$effect(() => {
+			context.fillStyle = color;
+			context.fillRect(0, 0, canvas.width, canvas.height);
+		});
+	}}
+></canvas>
+```
+
+> [!NOTE]
+> The nested effect runs whenever `color` changes, while the outer effect (where `canvas.getContext(...)` is called) only runs once, since it doesn't read any reactive state.
+
+## Conditional attachments
+
+Falsy values like `false` or `undefined` are treated as no attachment, enabling conditional usage:
+
+```svelte
+<div {@attach enabled && myAttachment}>...</div>
+```
+
+## Passing attachments to components
+
+When used on a component, `{@attach ...}` will create a prop whose key is a [`Symbol`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol). If the component then [spreads](/tutorial/svelte/spread-props) props onto an element, the element will receive those attachments.
+
+This allows you to create _wrapper components_ that augment elements (demo:
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	/** @type {import('svelte/elements').HTMLButtonAttributes} */
+	let { children, ...props } = $props();
+</script>
+
+<!-- `props` includes attachments -->
+<button {...props}>
+	{@render children?.()}
+</button>
+```
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+	import Button from './Button.svelte';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<Button {@attach tooltip(content)}>Hover me</Button>
+```
+
+## Controlling when attachments re-run
+
+Attachments, unlike [actions](use), are fully reactive: `{@attach foo(bar)}` will re-run on changes to `foo` _or_ `bar` (or any state read inside `foo`):
+
+```js
+// @errors: 7006 2304 2552
+function foo(bar) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+		update(node, bar);
+	};
+}
+```
+
+In the rare case that this is a problem (for example, if `foo` does expensive and unavoidable setup work) consider passing the data inside a function and reading it in a child effect:
+
+```js
+// @errors: 7006 2304 2552
+function foo(+++getBar+++) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+
++++		$effect(() => {
+			update(node, getBar());
+		});+++
+	}
+}
+```
+
+## Creating attachments programmatically
+
+To add attachments to an object that will be spread onto a component or element, use [`createAttachmentKey`](svelte-attachments#createAttachmentKey).
+
+## Converting actions to attachments
+
+If you're using a library that only provides actions, you can convert them to attachments with [`fromAction`](svelte-attachments#fromAction), allowing you to (for example) use them with components.

packages/opencode/skills/svelte-core-bestpractices/references/@render.md

@@ -0,0 +1,35 @@
+To render a [snippet](snippet), use a `{@render ...}` tag.
+
+```svelte
+{#snippet sum(a, b)}
+	<p>{a} + {b} = {a + b}</p>
+{/snippet}
+
+{@render sum(1, 2)}
+{@render sum(3, 4)}
+{@render sum(5, 6)}
+```
+
+The expression can be an identifier like `sum`, or an arbitrary JavaScript expression:
+
+```svelte
+{@render (cool ? coolSnippet : lameSnippet)()}
+```
+
+## Optional snippets
+
+If the snippet is potentially undefined — for example, because it's an incoming prop — then you can use optional chaining to only render it when it _is_ defined:
+
+```svelte
+{@render children?.()}
+```
+
+Alternatively, use an [`{#if ...}`](if) block with an `:else` clause to render fallback content:
+
+```svelte
+{#if children}
+	{@render children()}
+{:else}
+	<p>fallback content</p>
+{/if}
+```

packages/opencode/skills/svelte-core-bestpractices/references/await-expressions.md

@@ -0,0 +1,180 @@
+As of Svelte 5.36, you can use the `await` keyword inside your components in three places where it was previously unavailable:
+
+- at the top level of your component's `<script>`
+- inside `$derived(...)` declarations
+- inside your markup
+
+This feature is currently experimental, and you must opt in by adding the `experimental.async` option wherever you [configure](/docs/kit/configuration) Svelte, usually `svelte.config.js`:
+
+```js
+/// file: svelte.config.js
+export default {
+	compilerOptions: {
+		experimental: {
+			async: true,
+		},
+	},
+};
+```
+
+The experimental flag will be removed in Svelte 6.
+
+## Synchronized updates
+
+When an `await` expression depends on a particular piece of state, changes to that state will not be reflected in the UI until the asynchronous work has completed, so that the UI is not left in an inconsistent state. In other words, in an example like this...
+
+```svelte
+<script>
+	let a = $state(1);
+	let b = $state(2);
+
+	async function add(a, b) {
+		await new Promise((f) => setTimeout(f, 500)); // artificial delay
+		return a + b;
+	}
+</script>
+
+<input type="number" bind:value={a} />
+<input type="number" bind:value={b} />
+
+<p>{a} + {b} = {await add(a, b)}</p>
+```
+
+...if you increment `a`, the contents of the `<p>` will _not_ immediately update to read this —
+
+```html
+<p>2 + 2 = 3</p>
+```
+
+— instead, the text will update to `2 + 2 = 4` when `add(a, b)` resolves.
+
+Updates can overlap — a fast update will be reflected in the UI while an earlier slow update is still ongoing.
+
+## Concurrency
+
+Svelte will do as much asynchronous work as it can in parallel. For example if you have two `await` expressions in your markup...
+
+```svelte
+<p>{await one()}</p><p>{await two()}</p>
+```
+
+...both functions will run at the same time, as they are independent expressions, even though they are _visually_ sequential.
+
+This does not apply to sequential `await` expressions inside your `<script>` or inside async functions — these run like any other asynchronous JavaScript. An exception is that independent `$derived` expressions will update independently, even though they will run sequentially when they are first created:
+
+```js
+// these will run sequentially the first time,
+// but will update independently
+let a = $derived(await one());
+let b = $derived(await two());
+```
+
+> [!NOTE] If you write code like this, expect Svelte to give you an [`await_waterfall`](runtime-warnings#Client-warnings-await_waterfall) warning
+
+## Indicating loading states
+
+To render placeholder UI, you can wrap content in a `<svelte:boundary>` with a [`pending`](svelte-boundary#Properties-pending) snippet. This will be shown when the boundary is first created, but not for subsequent updates, which are globally coordinated.
+
+After the contents of a boundary have resolved for the first time and have replaced the `pending` snippet, you can detect subsequent async work with [`$effect.pending()`]($effect#$effect.pending). This is what you would use to display a "we're asynchronously validating your input" spinner next to a form field, for example.
+
+You can also use [`settled()`](svelte#settled) to get a promise that resolves when the current update is complete:
+
+```js
+import { tick, settled } from 'svelte';
+
+async function onclick() {
+	updating = true;
+
+	// without this, the change to `updating` will be
+	// grouped with the other changes, meaning it
+	// won't be reflected in the UI
+	await tick();
+
+	color = 'octarine';
+	answer = 42;
+
+	await settled();
+
+	// any updates affected by `color` or `answer`
+	// have now been applied
+	updating = false;
+}
+```
+
+## Error handling
+
+Errors in `await` expressions will bubble to the nearest [error boundary](svelte-boundary).
+
+## Server-side rendering
+
+Svelte supports asynchronous server-side rendering (SSR) with the `render(...)` API. To use it, simply await the return value:
+
+```js
+/// file: server.js
+import { render } from 'svelte/server';
+import App from './App.svelte';
+
+const { head, body } = +++await+++ render(App);
+```
+
+> [!NOTE] If you're using a framework like SvelteKit, this is done on your behalf.
+
+If a `<svelte:boundary>` with a `pending` snippet is encountered during SSR, that snippet will be rendered while the rest of the content is ignored. All `await` expressions encountered outside boundaries with `pending` snippets will resolve and render their contents prior to `await render(...)` returning.
+
+> [!NOTE] In the future, we plan to add a streaming implementation that renders the content in the background.
+
+## Forking
+
+The [`fork(...)`](svelte#fork) API, added in 5.42, makes it possible to run `await` expressions that you _expect_ to happen in the near future. This is mainly intended for frameworks like SvelteKit to implement preloading when (for example) users signal an intent to navigate.
+
+```svelte
+<script>
+	import { fork } from 'svelte';
+	import Menu from './Menu.svelte';
+
+	let open = $state(false);
+
+	/** @type {import('svelte').Fork | null} */
+	let pending = null;
+
+	function preload() {
+		pending ??= fork(() => {
+			open = true;
+		});
+	}
+
+	function discard() {
+		pending?.discard();
+		pending = null;
+	}
+</script>
+
+<button
+	onfocusin={preload}
+	onfocusout={discard}
+	onpointerenter={preload}
+	onpointerleave={discard}
+	onclick={() => {
+		pending?.commit();
+		pending = null;
+
+		// in case `pending` didn't exist
+		// (if it did, this is a no-op)
+		open = true;
+	}}>open menu</button
+>
+
+{#if open}
+	<!-- any async work inside this component will start
+	     as soon as the fork is created -->
+	<Menu onclose={() => (open = false)} />
+{/if}
+```
+
+## Caveats
+
+As an experimental feature, the details of how `await` is handled (and related APIs like `$effect.pending()`) are subject to breaking changes outside of a semver major release, though we intend to keep such changes to a bare minimum.
+
+## Breaking changes
+
+Effects run in a slightly different order when the `experimental.async` option is `true`. Specifically, _block_ effects like `{#if ...}` and `{#each ...}` now run before an `$effect.pre` or `beforeUpdate` in the same component, which means that in very rare situations.

packages/opencode/skills/svelte-core-bestpractices/references/bind.md

@@ -0,0 +1,16 @@
+## Function bindings
+
+You can also use `bind:property={get, set}`, where `get` and `set` are functions, allowing you to perform validation and transformation:
+
+```svelte
+<input bind:value={() => value, (v) => (value = v.toLowerCase())} />
+```
+
+In the case of readonly bindings like [dimension bindings](#Dimensions), the `get` value should be `null`:
+
+```svelte
+<div bind:clientWidth={null, redraw} bind:clientHeight={null, redraw}>...</div>
+```
+
+> [!NOTE]
+> Function bindings are available in Svelte 5.9.0 and newer.

packages/opencode/skills/svelte-core-bestpractices/references/each.md

@@ -0,0 +1,42 @@
+## Keyed each blocks
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name (key)}...{/each}
+```
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name, index (key)}...{/each}
+```
+
+If a _key_ expression is provided — which must uniquely identify each list item — Svelte will use it to intelligently update the list when data changes by inserting, moving and deleting items, rather than adding or removing items at the end and updating the state in the middle.
+
+The key can be any object, but strings and numbers are recommended since they allow identity to persist when the objects themselves change.
+
+```svelte
+{#each items as item (item.id)}
+	<li>{item.name} x {item.qty}</li>
+{/each}
+
+<!-- or with additional index value -->
+{#each items as item, i (item.id)}
+	<li>{i + 1}: {item.name} x {item.qty}</li>
+{/each}
+```
+
+You can freely use destructuring and rest patterns in each blocks.
+
+```svelte
+{#each items as { id, name, qty }, i (id)}
+	<li>{i + 1}: {name} x {qty}</li>
+{/each}
+
+{#each objects as { id, ...rest }}
+	<li><span>{id}</span><MyComponent {...rest} /></li>
+{/each}
+
+{#each items as [id, ...rest]}
+	<li><span>{id}</span><MyComponent values={rest} /></li>
+{/each}
+```

packages/opencode/skills/svelte-core-bestpractices/references/hydratable.md

@@ -0,0 +1,100 @@
+In Svelte, when you want to render asynchronous content data on the server, you can simply `await` it. This is great! However, it comes with a pitfall: when hydrating that content on the client, Svelte has to redo the asynchronous work, which blocks hydration for however long it takes:
+
+```svelte
+<script>
+	import { getUser } from 'my-database-library';
+
+	// This will get the user on the server, render the user's name into the h1,
+	// and then, during hydration on the client, it will get the user _again_,
+	// blocking hydration until it's done.
+	const user = await getUser();
+</script>
+
+<h1>{user.name}</h1>
+```
+
+That's silly, though. If we've already done the hard work of getting the data on the server, we don't want to get it again during hydration on the client. `hydratable` is a low-level API built to solve this problem. You probably won't need this very often — it will be used behind the scenes by whatever datafetching library you use. For example, it powers [remote functions in SvelteKit](/docs/kit/remote-functions).
+
+To fix the example above:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	import { getUser } from 'my-database-library';
+
+	// During server rendering, this will serialize and stash the result of `getUser`, associating
+	// it with the provided key and baking it into the `head` content. During hydration, it will
+	// look for the serialized version, returning it instead of running `getUser`. After hydration
+	// is done, if it's called again, it'll simply invoke `getUser`.
+	const user = await hydratable('user', () => getUser());
+</script>
+
+<h1>{user.name}</h1>
+```
+
+This API can also be used to provide access to random or time-based values that are stable between server rendering and hydration. For example, to get a random number that doesn't update on hydration:
+
+```ts
+import { hydratable } from 'svelte';
+const rand = hydratable('random', () => Math.random());
+```
+
+If you're a library author, be sure to prefix the keys of your `hydratable` values with the name of your library so that your keys don't conflict with other libraries.
+
+## Serialization
+
+All data returned from a `hydratable` function must be serializable. But this doesn't mean you're limited to JSON — Svelte uses [`devalue`](https://npmjs.com/package/devalue), which can serialize all sorts of things including `Map`, `Set`, `URL`, and `BigInt`. Check the documentation page for a full list. In addition to these, thanks to some Svelte magic, you can also fearlessly use promises:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	const promises = hydratable('random', () => {
+		return {
+			one: Promise.resolve(1),
+			two: Promise.resolve(2),
+		};
+	});
+</script>
+
+{await promises.one}
+{await promises.two}
+```
+
+## CSP
+
+`hydratable` adds an inline `<script>` block to the `head` returned from `render`. If you're using [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CSP) (CSP), this script will likely fail to run. You can provide a `nonce` to `render`:
+
+```js
+const nonce = crypto.randomUUID();
+
+const { head, body } = await render(App, {
+	csp: { nonce },
+});
+```
+
+This will add the `nonce` to the script block, on the assumption that you will later add the same nonce to the CSP header of the document that contains it:
+
+```js
+response.headers.set('Content-Security-Policy', `script-src 'nonce-${nonce}'`);
+```
+
+It's essential that a `nonce` — which, British slang definition aside, means 'number used once' — is only used when dynamically server rendering an individual response.
+
+If instead you are generating static HTML ahead of time, you must use hashes instead:
+
+```js
+const { head, body, hashes } = await render(App, {
+	csp: { hash: true },
+});
+```
+
+`hashes.script` will be an array of strings like `["sha256-abcd123"]`. As with `nonce`, the hashes should be used in your CSP header:
+
+```js
+response.headers.set(
+	'Content-Security-Policy',
+	`script-src ${hashes.script.map((hash) => `'${hash}'`).join(' ')}`,
+);
+```
+
+We recommend using `nonce` over hash if you can, as `hash` will interfere with streaming SSR in the future.

packages/opencode/skills/svelte-core-bestpractices/references/snippet.md

@@ -0,0 +1,276 @@
+```svelte
+<!--- copy: false  --->
+{#snippet name()}...{/snippet}
+```
+
+```svelte
+<!--- copy: false  --->
+{#snippet name(param1, param2, paramN)}...{/snippet}
+```
+
+Snippets, and [render tags](@render), are a way to create reusable chunks of markup inside your components. Instead of writing duplicative code like this...
+
+```svelte
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			<figure>
+				<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+				<figcaption>{image.caption}</figcaption>
+			</figure>
+		</a>
+	{:else}
+		<figure>
+			<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+			<figcaption>{image.caption}</figcaption>
+		</figure>
+	{/if}
+{/each}
+```
+
+...you can write this:
+
+```svelte
+{#snippet figure(image)}
+	<figure>
+		<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+		<figcaption>{image.caption}</figcaption>
+	</figure>
+{/snippet}
+
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			{@render figure(image)}
+		</a>
+	{:else}
+		{@render figure(image)}
+	{/if}
+{/each}
+```
+
+Like function declarations, snippets can have an arbitrary number of parameters, which can have default values, and you can destructure each parameter. You cannot use rest parameters, however.
+
+## Snippet scope
+
+Snippets can be declared anywhere inside your component. They can reference values declared outside themselves, for example in the `<script>` tag or in `{#each ...}` blocks (demo...
+
+```svelte
+<script>
+	let { message = `it's great to see you!` } = $props();
+</script>
+
+{#snippet hello(name)}
+	<p>hello {name}! {message}!</p>
+{/snippet}
+
+{@render hello('alice')}
+{@render hello('bob')}
+```
+
+...and they are 'visible' to everything in the same lexical scope (i.e. siblings, and children of those siblings):
+
+```svelte
+<div>
+	{#snippet x()}
+		{#snippet y()}...{/snippet}
+
+		<!-- this is fine -->
+		{@render y()}
+	{/snippet}
+
+	<!-- this will error, as `y` is not in scope -->
+	{@render y()}
+</div>
+
+<!-- this will also error, as `x` is not in scope -->
+{@render x()}
+```
+
+Snippets can reference themselves and each other (demo:
+
+```svelte
+{#snippet blastoff()}
+	<span>🚀</span>
+{/snippet}
+
+{#snippet countdown(n)}
+	{#if n > 0}
+		<span>{n}...</span>
+		{@render countdown(n - 1)}
+	{:else}
+		{@render blastoff()}
+	{/if}
+{/snippet}
+
+{@render countdown(10)}
+```
+
+## Passing snippets to components
+
+### Explicit props
+
+Within the template, snippets are values just like any other. As such, they can be passed to components as props (demo:
+
+```svelte
+<script>
+	import Table from './Table.svelte';
+
+	const fruits = [
+		{ name: 'apples', qty: 5, price: 2 },
+		{ name: 'bananas', qty: 10, price: 1 },
+		{ name: 'cherries', qty: 20, price: 0.5 },
+	];
+</script>
+
+{#snippet header()}
+	<th>fruit</th>
+	<th>qty</th>
+	<th>price</th>
+	<th>total</th>
+{/snippet}
+
+{#snippet row(d)}
+	<td>{d.name}</td>
+	<td>{d.qty}</td>
+	<td>{d.price}</td>
+	<td>{d.qty * d.price}</td>
+{/snippet}
+
+<Table data={fruits} {header} {row} />
+```
+
+Think about it like passing content instead of data to a component. The concept is similar to slots in web components.
+
+### Implicit props
+
+As an authoring convenience, snippets declared directly _inside_ a component implicitly become props _on_ the component (demo:
+
+```svelte
+<!-- this is semantically the same as the above -->
+<Table data={fruits}>
+	{#snippet header()}
+		<th>fruit</th>
+		<th>qty</th>
+		<th>price</th>
+		<th>total</th>
+	{/snippet}
+
+	{#snippet row(d)}
+		<td>{d.name}</td>
+		<td>{d.qty}</td>
+		<td>{d.price}</td>
+		<td>{d.qty * d.price}</td>
+	{/snippet}
+</Table>
+```
+
+### Implicit `children` snippet
+
+Any content inside the component tags that is _not_ a snippet declaration implicitly becomes part of the `children` snippet (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<Button>click me</Button>
+```
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	let { children } = $props();
+</script>
+
+<!-- result will be <button>click me</button> -->
+<button>{@render children()}</button>
+```
+
+> [!NOTE] Note that you cannot have a prop called `children` if you also have content inside the component — for this reason, you should avoid having props with that name
+
+### Optional snippet props
+
+You can declare snippet props as being optional. You can either use optional chaining to not render anything if the snippet isn't set...
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{@render children?.()}
+```
+
+...or use an `#if` block to render fallback content:
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{#if children}
+	{@render children()}
+{:else}
+	fallback content
+{/if}
+```
+
+## Typing snippets
+
+Snippets implement the `Snippet` interface imported from `'svelte'`:
+
+```svelte
+<script lang="ts">
+	import type { Snippet } from 'svelte';
+
+	interface Props {
+		data: any[];
+		children: Snippet;
+		row: Snippet<[any]>;
+	}
+
+	let { data, children, row }: Props = $props();
+</script>
+```
+
+With this change, red squigglies will appear if you try and use the component without providing a `data` prop and a `row` snippet. Notice that the type argument provided to `Snippet` is a tuple, since snippets can have multiple parameters.
+
+We can tighten things up further by declaring a generic, so that `data` and `row` refer to the same type:
+
+```svelte
+<script lang="ts" generics="T">
+	import type { Snippet } from 'svelte';
+
+	let {
+		data,
+		children,
+		row,
+	}: {
+		data: T[];
+		children: Snippet;
+		row: Snippet<[T]>;
+	} = $props();
+</script>
+```
+
+## Exporting snippets
+
+Snippets declared at the top level of a `.svelte` file can be exported from a `<script module>` for use in other components, provided they don't reference any declarations in a non-module `<script>` (whether directly or indirectly, via other snippets) (demo:
+
+```svelte
+<script module>
+	export { add };
+</script>
+
+{#snippet add(a, b)}
+	{a} + {b} = {a + b}
+{/snippet}
+```
+
+> [!NOTE]
+> This requires Svelte 5.5.0 or newer
+
+## Programmatic snippets
+
+Snippets can be created programmatically with the [`createRawSnippet`](svelte#createRawSnippet) API. This is intended for advanced use cases.
+
+## Snippets and slots
+
+In Svelte 4, content can be passed to components using [slots](legacy-slots). Snippets are more powerful and flexible, and so slots have been deprecated in Svelte 5.

packages/opencode/skills/svelte-core-bestpractices/references/svelte-reactivity.md

@@ -0,0 +1,61 @@
+## createSubscriber
+
+<blockquote class="since note">
+
+Available since 5.7.0
+
+</blockquote>
+
+Returns a `subscribe` function that integrates external event-based systems with Svelte's reactivity.
+It's particularly useful for integrating with web APIs like `MediaQuery`, `IntersectionObserver`, or `WebSocket`.
+
+If `subscribe` is called inside an effect (including indirectly, for example inside a getter),
+the `start` callback will be called with an `update` function. Whenever `update` is called, the effect re-runs.
+
+If `start` returns a cleanup function, it will be called when the effect is destroyed.
+
+If `subscribe` is called in multiple effects, `start` will only be called once as long as the effects
+are active, and the returned teardown function will only be called when all effects are destroyed.
+
+It's best understood with an example. Here's an implementation of [`MediaQuery`](/docs/svelte/svelte-reactivity#MediaQuery):
+
+```js
+// @errors: 7031
+import { createSubscriber } from 'svelte/reactivity';
+import { on } from 'svelte/events';
+
+export class MediaQuery {
+	#query;
+	#subscribe;
+
+	constructor(query) {
+		this.#query = window.matchMedia(`(${query})`);
+
+		this.#subscribe = createSubscriber((update) => {
+			// when the `change` event occurs, re-run any effects that read `this.current`
+			const off = on(this.#query, 'change', update);
+
+			// stop listening when all the effects are destroyed
+			return () => off();
+		});
+	}
+
+	get current() {
+		// This makes the getter reactive, if read in an effect
+		this.#subscribe();
+
+		// Return the current state of the query, whether or not we're in an effect
+		return this.#query.matches;
+	}
+}
+```
+
+<div class="ts-block">
+
+```dts
+function createSubscriber(
+	start: (update: () => void) => (() => void) | void
+): () => void;
+```
+
+</div>

packages/opencode/tsconfig.json

@@ -1,5 +1,9 @@
 {
 	"extends": "../../tsconfig.json",
-	"include": ["index.ts", "config.ts", "scripts/*"],
+	"compilerOptions": {
+		"allowImportingTsExtensions": true,
+		"types": ["@types/node"]
+	},
+	"include": ["index.ts", "config.ts", "agents.ts", "scripts/*"],
 	"exclude": ["node_modules"]
 }

plugins/claude/svelte/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
 	"name": "svelte",
 	"description": "A plugin for all things related to Svelte development, MCP, skills, and more.",
-	"version": "1.0.1",
+	"version": "1.0.4",
 	"author": {
 		"name": "Svelte"
 	},

plugins/claude/svelte/agents/svelte-file-editor.md

@@ -1,11 +1,15 @@
 ---
 name: svelte-file-editor
-description: Specialized Svelte 5 code editor. MUST BE USED PROACTIVELY when creating, editing, or reviewing any .svelte file or .svelte.ts/.svelte.js module and MUST use the tools from the MCP server. Fetches relevant documentation and validates code using the Svelte MCP server tools.
+description: Specialized Svelte 5 code editor. MUST BE USED PROACTIVELY when creating, editing, or reviewing any .svelte file or .svelte.ts/.svelte.js module and MUST use the tools from the MCP server or the `svelte-file-editor` skill if they are available. Fetches relevant documentation and validates code using the Svelte MCP server tools.
 permissionMode: acceptEdits
 ---
 
 You are a Svelte 5 expert responsible for writing, editing, and validating Svelte components and modules. You have access to the Svelte MCP server which provides documentation and code analysis tools. Always use the tools from the svelte MCP server to fetch documentation with `get_documentation` and validating the code with `svelte_autofixer`. If the autofixer returns any issue or suggestions try to solve them.
 
+If the MCP tools are not available you can use the `svelte-code-writer` skill to learn how to use the `@sveltejs/mcp` cli to access the same tools.
+
+If the skill is not available you can run `npx @sveltejs/mcp@latest -y --help` to learn how to use it.
+
 ## Available MCP Tools
 
 ### 1. list-sections

plugins/claude/svelte/skills/svelte-core-bestpractices/SKILL.md

@@ -0,0 +1,176 @@
+---
+name: svelte-core-bestpractices
+description: Guidance on writing fast, robust, modern Svelte code. Load this skill whenever in a Svelte project and asked to write/edit or analyze a Svelte component or module. Covers reactivity, event handling, styling, integration with libraries and more.
+---
+
+## `$state`
+
+Only use the `$state` rune for variables that should be _reactive_ — in other words, variables that cause an `$effect`, `$derived` or template expression to update. Everything else can be a normal variable.
+
+Objects and arrays (`$state({...})` or `$state([...])`) are made deeply reactive, meaning mutation will trigger updates. This has a trade-off: in exchange for fine-grained reactivity, the objects must be proxied, which has performance overhead. In cases where you're dealing with large objects that are only ever reassigned (rather than mutated), use `$state.raw` instead. This is often the case with API responses, for example.
+
+## `$derived`
+
+To compute something from state, use `$derived` rather than `$effect`:
+
+```js
+// do this
+let square = $derived(num * num);
+
+// don't do this
+let square;
+
+$effect(() => {
+	square = num * num;
+});
+```
+
+> [!NOTE] `$derived` is given an expression, _not_ a function. If you need to use a function (because the expression is complex, for example) use `$derived.by`.
+
+Deriveds are writable — you can assign to them, just like `$state`, except that they will re-evaluate when their expression changes.
+
+If the derived expression is an object or array, it will be returned as-is — it is _not_ made deeply reactive. You can, however, use `$state` inside `$derived.by` in the rare cases that you need this.
+
+## `$effect`
+
+Effects are an escape hatch and should mostly be avoided. In particular, avoid updating state inside effects.
+
+- If you need to sync state to an external library such as D3, it is often neater to use [`{@attach ...}`](references/@attach.md)
+- If you need to run some code in response to user interaction, put the code directly in an event handler or use a [function binding](references/bind.md) as appropriate
+- If you need to log values for debugging purposes, use [`$inspect`](references/$inspect.md)
+- If you need to observe something external to Svelte, use [`createSubscriber`](references/svelte-reactivity.md)
+
+Never wrap the contents of an effect in `if (browser) {...}` or similar — effects do not run on the server.
+
+## `$props`
+
+Treat props as though they will change. For example, values that depend on props should usually use `$derived`:
+
+```js
+// @errors: 2451
+let { type } = $props();
+
+// do this
+let color = $derived(type === 'danger' ? 'red' : 'green');
+
+// don't do this — `color` will not update if `type` changes
+let color = type === 'danger' ? 'red' : 'green';
+```
+
+## `$inspect.trace`
+
+`$inspect.trace` is a debugging tool for reactivity. If something is not updating properly or running more than it should you can add `$inspect.trace(label)` as the first line of an `$effect` or `$derived.by` (or any function they call) to trace their dependencies and discover which one triggered an update.
+
+## Events
+
+Any element attribute starting with `on` is treated as an event listener:
+
+```svelte
+<button onclick={() => {...}}>click me</button>
+
+<!-- attribute shorthand also works -->
+<button {onclick}>...</button>
+
+<!-- so do spread attributes -->
+<button {...props}>...</button>
+```
+
+If you need to attach listeners to `window` or `document` you can use `<svelte:window>` and `<svelte:document>`:
+
+```svelte
+<svelte:window onkeydown={...} />
+<svelte:document onvisibilitychange={...} />
+```
+
+Avoid using `onMount` or `$effect` for this.
+
+## Snippets
+
+[Snippets](references/snippet.md) are a way to define reusable chunks of markup that can be instantiated with the [`{@render ...}`](references/@render.md) tag, or passed to components as props. They must be declared within the template.
+
+```svelte
+{#snippet greeting(name)}
+	<p>hello {name}!</p>
+{/snippet}
+
+{@render greeting('world')}
+```
+
+> [!NOTE] Snippets declared at the top level of a component (i.e. not inside elements or blocks) can be referenced inside `<script>`. A snippet that doesn't reference component state is also available in a `<script module>`, in which case it can be exported for use by other components.
+
+## Each blocks
+
+Prefer to use [keyed each blocks](references/each.md) — this improves performance by allowing Svelte to surgically insert or remove items rather than updating the DOM belonging to existing items.
+
+> [!NOTE] The key _must_ uniquely identify the object. Do not use the index as a key.
+
+Avoid destructuring if you need to mutate the item (with something like `bind:value={item.count}`, for example).
+
+## Using JavaScript variables in CSS
+
+If you have a JS variable that you want to use inside CSS you can set a CSS custom property with the `style:` directive.
+
+```svelte
+<div style:--columns={columns}>...</div>
+```
+
+You can then reference `var(--columns)` inside the component's `<style>`.
+
+## Styling child components
+
+The CSS in a component's `<style>` is scoped to that component. If a parent component needs to control the child's styles, the preferred way is to use CSS custom properties:
+
+```svelte
+<!-- Parent.svelte -->
+<Child --color="red" />
+
+<!-- Child.svelte -->
+<h1>Hello</h1>
+
+<style>
+	h1 {
+		color: var(--color);
+	}
+</style>
+```
+
+If this is impossible (for example, the child component comes from a library) you can use `:global` to override styles:
+
+```svelte
+<div>
+	<Child />
+</div>
+
+<style>
+	div :global {
+		h1 {
+			color: red;
+		}
+	}
+</style>
+```
+
+## Context
+
+Consider using context instead of declaring state in a shared module. This will scope the state to the part of the app that needs it, and eliminate the possibility of it leaking between users when server-side rendering.
+
+Use `createContext` rather than `setContext` and `getContext`, as it provides type safety.
+
+## Async Svelte
+
+If using version 5.36 or higher, you can use [await expressions](references/await-expressions.md) and [hydratable](references/hydratable.md) to use promises directly inside components. Note that these require the `experimental.async` option to be enabled in `svelte.config.js` as they are not yet considered fully stable.
+
+## Avoid legacy features
+
+Always use runes mode for new code, and avoid features that have more modern replacements:
+
+- use `$state` instead of implicit reactivity (e.g. `let count = 0; count += 1`)
+- use `$derived` and `$effect` instead of `$:` assignments and statements (but only use effects when there is no better solution)
+- use `$props` instead of `export let`, `$$props` and `$$restProps`
+- use `onclick={...}` instead of `on:click={...}`
+- use `{#snippet ...}` and `{@render ...}` instead of `<slot>` and `$$slots` and `<svelte:fragment>`
+- use `<DynamicComponent>` instead of `<svelte:component this={DynamicComponent}>`
+- use `import Self from './ThisComponent.svelte'` and `<Self>` instead of `<svelte:self>`
+- use classes with `$state` fields to share reactivity between components, instead of using stores
+- use `{@attach ...}` instead of `use:action`
+- use clsx-style arrays and objects in `class` attributes, instead of the `class:` directive

plugins/claude/svelte/skills/svelte-core-bestpractices/references/$inspect.md

@@ -0,0 +1,53 @@
+> [!NOTE] `$inspect` only works during development. In a production build it becomes a noop.
+
+The `$inspect` rune is roughly equivalent to `console.log`, with the exception that it will re-run whenever its argument changes. `$inspect` tracks reactive state deeply, meaning that updating something inside an object or array using fine-grained reactivity will cause it to re-fire (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+	let message = $state('hello');
+
+	$inspect(count, message); // will console.log when `count` or `message` change
+</script>
+
+<button onclick={() => count++}>Increment</button>
+<input bind:value={message} />
+```
+
+On updates, a stack trace will be printed, making it easy to find the origin of a state change (unless you're in the playground, due to technical limitations).
+
+## $inspect(...).with
+
+`$inspect` returns a property `with`, which you can invoke with a callback, which will then be invoked instead of `console.log`. The first argument to the callback is either `"init"` or `"update"`; subsequent arguments are the values passed to `$inspect` (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+
+	$inspect(count).with((type, count) => {
+		if (type === 'update') {
+			debugger; // or `console.trace`, or whatever you want
+		}
+	});
+</script>
+
+<button onclick={() => count++}>Increment</button>
+```
+
+## $inspect.trace(...)
+
+This rune, added in 5.14, causes the surrounding function to be _traced_ in development. Any time the function re-runs as part of an [effect]($effect) or a [derived]($derived), information will be printed to the console about which pieces of reactive state caused the effect to fire.
+
+```svelte
+<script>
+	import { doSomeWork } from './elsewhere';
+
+	$effect(() => {
+		+++// $inspect.trace must be the first statement of a function body+++
+		+++$inspect.trace();+++
+		doSomeWork();
+	});
+</script>
+```
+
+`$inspect.trace` takes an optional first argument which will be used as the label.

plugins/claude/svelte/skills/svelte-core-bestpractices/references/@attach.md

@@ -0,0 +1,166 @@
+Attachments are functions that run in an [effect]($effect) when an element is mounted to the DOM or when [state]($state) read inside the function updates.
+
+Optionally, they can return a function that is called before the attachment re-runs, or after the element is later removed from the DOM.
+
+> [!NOTE]
+> Attachments are available in Svelte 5.29 and newer.
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	/** @type {import('svelte/attachments').Attachment} */
+	function myAttachment(element) {
+		console.log(element.nodeName); // 'DIV'
+
+		return () => {
+			console.log('cleaning up');
+		};
+	}
+</script>
+
+<div {@attach myAttachment}>...</div>
+```
+
+An element can have any number of attachments.
+
+## Attachment factories
+
+A useful pattern is for a function, such as `tooltip` in this example, to _return_ an attachment (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<button {@attach tooltip(content)}> Hover me </button>
+```
+
+Since the `tooltip(content)` expression runs inside an [effect]($effect), the attachment will be destroyed and recreated whenever `content` changes. The same thing would happen for any state read _inside_ the attachment function when it first runs. (If this isn't what you want, see [Controlling when attachments re-run](#Controlling-when-attachments-re-run).)
+
+## Inline attachments
+
+Attachments can also be created inline (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<canvas
+	width={32}
+	height={32}
+	{@attach (canvas) => {
+		const context = canvas.getContext('2d');
+
+		$effect(() => {
+			context.fillStyle = color;
+			context.fillRect(0, 0, canvas.width, canvas.height);
+		});
+	}}
+></canvas>
+```
+
+> [!NOTE]
+> The nested effect runs whenever `color` changes, while the outer effect (where `canvas.getContext(...)` is called) only runs once, since it doesn't read any reactive state.
+
+## Conditional attachments
+
+Falsy values like `false` or `undefined` are treated as no attachment, enabling conditional usage:
+
+```svelte
+<div {@attach enabled && myAttachment}>...</div>
+```
+
+## Passing attachments to components
+
+When used on a component, `{@attach ...}` will create a prop whose key is a [`Symbol`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol). If the component then [spreads](/tutorial/svelte/spread-props) props onto an element, the element will receive those attachments.
+
+This allows you to create _wrapper components_ that augment elements (demo:
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	/** @type {import('svelte/elements').HTMLButtonAttributes} */
+	let { children, ...props } = $props();
+</script>
+
+<!-- `props` includes attachments -->
+<button {...props}>
+	{@render children?.()}
+</button>
+```
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+	import Button from './Button.svelte';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<Button {@attach tooltip(content)}>Hover me</Button>
+```
+
+## Controlling when attachments re-run
+
+Attachments, unlike [actions](use), are fully reactive: `{@attach foo(bar)}` will re-run on changes to `foo` _or_ `bar` (or any state read inside `foo`):
+
+```js
+// @errors: 7006 2304 2552
+function foo(bar) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+		update(node, bar);
+	};
+}
+```
+
+In the rare case that this is a problem (for example, if `foo` does expensive and unavoidable setup work) consider passing the data inside a function and reading it in a child effect:
+
+```js
+// @errors: 7006 2304 2552
+function foo(+++getBar+++) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+
++++		$effect(() => {
+			update(node, getBar());
+		});+++
+	}
+}
+```
+
+## Creating attachments programmatically
+
+To add attachments to an object that will be spread onto a component or element, use [`createAttachmentKey`](svelte-attachments#createAttachmentKey).
+
+## Converting actions to attachments
+
+If you're using a library that only provides actions, you can convert them to attachments with [`fromAction`](svelte-attachments#fromAction), allowing you to (for example) use them with components.

plugins/claude/svelte/skills/svelte-core-bestpractices/references/@render.md

@@ -0,0 +1,35 @@
+To render a [snippet](snippet), use a `{@render ...}` tag.
+
+```svelte
+{#snippet sum(a, b)}
+	<p>{a} + {b} = {a + b}</p>
+{/snippet}
+
+{@render sum(1, 2)}
+{@render sum(3, 4)}
+{@render sum(5, 6)}
+```
+
+The expression can be an identifier like `sum`, or an arbitrary JavaScript expression:
+
+```svelte
+{@render (cool ? coolSnippet : lameSnippet)()}
+```
+
+## Optional snippets
+
+If the snippet is potentially undefined — for example, because it's an incoming prop — then you can use optional chaining to only render it when it _is_ defined:
+
+```svelte
+{@render children?.()}
+```
+
+Alternatively, use an [`{#if ...}`](if) block with an `:else` clause to render fallback content:
+
+```svelte
+{#if children}
+	{@render children()}
+{:else}
+	<p>fallback content</p>
+{/if}
+```

plugins/claude/svelte/skills/svelte-core-bestpractices/references/await-expressions.md

@@ -0,0 +1,180 @@
+As of Svelte 5.36, you can use the `await` keyword inside your components in three places where it was previously unavailable:
+
+- at the top level of your component's `<script>`
+- inside `$derived(...)` declarations
+- inside your markup
+
+This feature is currently experimental, and you must opt in by adding the `experimental.async` option wherever you [configure](/docs/kit/configuration) Svelte, usually `svelte.config.js`:
+
+```js
+/// file: svelte.config.js
+export default {
+	compilerOptions: {
+		experimental: {
+			async: true,
+		},
+	},
+};
+```
+
+The experimental flag will be removed in Svelte 6.
+
+## Synchronized updates
+
+When an `await` expression depends on a particular piece of state, changes to that state will not be reflected in the UI until the asynchronous work has completed, so that the UI is not left in an inconsistent state. In other words, in an example like this...
+
+```svelte
+<script>
+	let a = $state(1);
+	let b = $state(2);
+
+	async function add(a, b) {
+		await new Promise((f) => setTimeout(f, 500)); // artificial delay
+		return a + b;
+	}
+</script>
+
+<input type="number" bind:value={a} />
+<input type="number" bind:value={b} />
+
+<p>{a} + {b} = {await add(a, b)}</p>
+```
+
+...if you increment `a`, the contents of the `<p>` will _not_ immediately update to read this —
+
+```html
+<p>2 + 2 = 3</p>
+```
+
+— instead, the text will update to `2 + 2 = 4` when `add(a, b)` resolves.
+
+Updates can overlap — a fast update will be reflected in the UI while an earlier slow update is still ongoing.
+
+## Concurrency
+
+Svelte will do as much asynchronous work as it can in parallel. For example if you have two `await` expressions in your markup...
+
+```svelte
+<p>{await one()}</p><p>{await two()}</p>
+```
+
+...both functions will run at the same time, as they are independent expressions, even though they are _visually_ sequential.
+
+This does not apply to sequential `await` expressions inside your `<script>` or inside async functions — these run like any other asynchronous JavaScript. An exception is that independent `$derived` expressions will update independently, even though they will run sequentially when they are first created:
+
+```js
+// these will run sequentially the first time,
+// but will update independently
+let a = $derived(await one());
+let b = $derived(await two());
+```
+
+> [!NOTE] If you write code like this, expect Svelte to give you an [`await_waterfall`](runtime-warnings#Client-warnings-await_waterfall) warning
+
+## Indicating loading states
+
+To render placeholder UI, you can wrap content in a `<svelte:boundary>` with a [`pending`](svelte-boundary#Properties-pending) snippet. This will be shown when the boundary is first created, but not for subsequent updates, which are globally coordinated.
+
+After the contents of a boundary have resolved for the first time and have replaced the `pending` snippet, you can detect subsequent async work with [`$effect.pending()`]($effect#$effect.pending). This is what you would use to display a "we're asynchronously validating your input" spinner next to a form field, for example.
+
+You can also use [`settled()`](svelte#settled) to get a promise that resolves when the current update is complete:
+
+```js
+import { tick, settled } from 'svelte';
+
+async function onclick() {
+	updating = true;
+
+	// without this, the change to `updating` will be
+	// grouped with the other changes, meaning it
+	// won't be reflected in the UI
+	await tick();
+
+	color = 'octarine';
+	answer = 42;
+
+	await settled();
+
+	// any updates affected by `color` or `answer`
+	// have now been applied
+	updating = false;
+}
+```
+
+## Error handling
+
+Errors in `await` expressions will bubble to the nearest [error boundary](svelte-boundary).
+
+## Server-side rendering
+
+Svelte supports asynchronous server-side rendering (SSR) with the `render(...)` API. To use it, simply await the return value:
+
+```js
+/// file: server.js
+import { render } from 'svelte/server';
+import App from './App.svelte';
+
+const { head, body } = +++await+++ render(App);
+```
+
+> [!NOTE] If you're using a framework like SvelteKit, this is done on your behalf.
+
+If a `<svelte:boundary>` with a `pending` snippet is encountered during SSR, that snippet will be rendered while the rest of the content is ignored. All `await` expressions encountered outside boundaries with `pending` snippets will resolve and render their contents prior to `await render(...)` returning.
+
+> [!NOTE] In the future, we plan to add a streaming implementation that renders the content in the background.
+
+## Forking
+
+The [`fork(...)`](svelte#fork) API, added in 5.42, makes it possible to run `await` expressions that you _expect_ to happen in the near future. This is mainly intended for frameworks like SvelteKit to implement preloading when (for example) users signal an intent to navigate.
+
+```svelte
+<script>
+	import { fork } from 'svelte';
+	import Menu from './Menu.svelte';
+
+	let open = $state(false);
+
+	/** @type {import('svelte').Fork | null} */
+	let pending = null;
+
+	function preload() {
+		pending ??= fork(() => {
+			open = true;
+		});
+	}
+
+	function discard() {
+		pending?.discard();
+		pending = null;
+	}
+</script>
+
+<button
+	onfocusin={preload}
+	onfocusout={discard}
+	onpointerenter={preload}
+	onpointerleave={discard}
+	onclick={() => {
+		pending?.commit();
+		pending = null;
+
+		// in case `pending` didn't exist
+		// (if it did, this is a no-op)
+		open = true;
+	}}>open menu</button
+>
+
+{#if open}
+	<!-- any async work inside this component will start
+	     as soon as the fork is created -->
+	<Menu onclose={() => (open = false)} />
+{/if}
+```
+
+## Caveats
+
+As an experimental feature, the details of how `await` is handled (and related APIs like `$effect.pending()`) are subject to breaking changes outside of a semver major release, though we intend to keep such changes to a bare minimum.
+
+## Breaking changes
+
+Effects run in a slightly different order when the `experimental.async` option is `true`. Specifically, _block_ effects like `{#if ...}` and `{#each ...}` now run before an `$effect.pre` or `beforeUpdate` in the same component, which means that in very rare situations.

plugins/claude/svelte/skills/svelte-core-bestpractices/references/bind.md

@@ -0,0 +1,16 @@
+## Function bindings
+
+You can also use `bind:property={get, set}`, where `get` and `set` are functions, allowing you to perform validation and transformation:
+
+```svelte
+<input bind:value={() => value, (v) => (value = v.toLowerCase())} />
+```
+
+In the case of readonly bindings like [dimension bindings](#Dimensions), the `get` value should be `null`:
+
+```svelte
+<div bind:clientWidth={null, redraw} bind:clientHeight={null, redraw}>...</div>
+```
+
+> [!NOTE]
+> Function bindings are available in Svelte 5.9.0 and newer.

plugins/claude/svelte/skills/svelte-core-bestpractices/references/each.md

@@ -0,0 +1,42 @@
+## Keyed each blocks
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name (key)}...{/each}
+```
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name, index (key)}...{/each}
+```
+
+If a _key_ expression is provided — which must uniquely identify each list item — Svelte will use it to intelligently update the list when data changes by inserting, moving and deleting items, rather than adding or removing items at the end and updating the state in the middle.
+
+The key can be any object, but strings and numbers are recommended since they allow identity to persist when the objects themselves change.
+
+```svelte
+{#each items as item (item.id)}
+	<li>{item.name} x {item.qty}</li>
+{/each}
+
+<!-- or with additional index value -->
+{#each items as item, i (item.id)}
+	<li>{i + 1}: {item.name} x {item.qty}</li>
+{/each}
+```
+
+You can freely use destructuring and rest patterns in each blocks.
+
+```svelte
+{#each items as { id, name, qty }, i (id)}
+	<li>{i + 1}: {name} x {qty}</li>
+{/each}
+
+{#each objects as { id, ...rest }}
+	<li><span>{id}</span><MyComponent {...rest} /></li>
+{/each}
+
+{#each items as [id, ...rest]}
+	<li><span>{id}</span><MyComponent values={rest} /></li>
+{/each}
+```

plugins/claude/svelte/skills/svelte-core-bestpractices/references/hydratable.md

@@ -0,0 +1,100 @@
+In Svelte, when you want to render asynchronous content data on the server, you can simply `await` it. This is great! However, it comes with a pitfall: when hydrating that content on the client, Svelte has to redo the asynchronous work, which blocks hydration for however long it takes:
+
+```svelte
+<script>
+	import { getUser } from 'my-database-library';
+
+	// This will get the user on the server, render the user's name into the h1,
+	// and then, during hydration on the client, it will get the user _again_,
+	// blocking hydration until it's done.
+	const user = await getUser();
+</script>
+
+<h1>{user.name}</h1>
+```
+
+That's silly, though. If we've already done the hard work of getting the data on the server, we don't want to get it again during hydration on the client. `hydratable` is a low-level API built to solve this problem. You probably won't need this very often — it will be used behind the scenes by whatever datafetching library you use. For example, it powers [remote functions in SvelteKit](/docs/kit/remote-functions).
+
+To fix the example above:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	import { getUser } from 'my-database-library';
+
+	// During server rendering, this will serialize and stash the result of `getUser`, associating
+	// it with the provided key and baking it into the `head` content. During hydration, it will
+	// look for the serialized version, returning it instead of running `getUser`. After hydration
+	// is done, if it's called again, it'll simply invoke `getUser`.
+	const user = await hydratable('user', () => getUser());
+</script>
+
+<h1>{user.name}</h1>
+```
+
+This API can also be used to provide access to random or time-based values that are stable between server rendering and hydration. For example, to get a random number that doesn't update on hydration:
+
+```ts
+import { hydratable } from 'svelte';
+const rand = hydratable('random', () => Math.random());
+```
+
+If you're a library author, be sure to prefix the keys of your `hydratable` values with the name of your library so that your keys don't conflict with other libraries.
+
+## Serialization
+
+All data returned from a `hydratable` function must be serializable. But this doesn't mean you're limited to JSON — Svelte uses [`devalue`](https://npmjs.com/package/devalue), which can serialize all sorts of things including `Map`, `Set`, `URL`, and `BigInt`. Check the documentation page for a full list. In addition to these, thanks to some Svelte magic, you can also fearlessly use promises:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	const promises = hydratable('random', () => {
+		return {
+			one: Promise.resolve(1),
+			two: Promise.resolve(2),
+		};
+	});
+</script>
+
+{await promises.one}
+{await promises.two}
+```
+
+## CSP
+
+`hydratable` adds an inline `<script>` block to the `head` returned from `render`. If you're using [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CSP) (CSP), this script will likely fail to run. You can provide a `nonce` to `render`:
+
+```js
+const nonce = crypto.randomUUID();
+
+const { head, body } = await render(App, {
+	csp: { nonce },
+});
+```
+
+This will add the `nonce` to the script block, on the assumption that you will later add the same nonce to the CSP header of the document that contains it:
+
+```js
+response.headers.set('Content-Security-Policy', `script-src 'nonce-${nonce}'`);
+```
+
+It's essential that a `nonce` — which, British slang definition aside, means 'number used once' — is only used when dynamically server rendering an individual response.
+
+If instead you are generating static HTML ahead of time, you must use hashes instead:
+
+```js
+const { head, body, hashes } = await render(App, {
+	csp: { hash: true },
+});
+```
+
+`hashes.script` will be an array of strings like `["sha256-abcd123"]`. As with `nonce`, the hashes should be used in your CSP header:
+
+```js
+response.headers.set(
+	'Content-Security-Policy',
+	`script-src ${hashes.script.map((hash) => `'${hash}'`).join(' ')}`,
+);
+```
+
+We recommend using `nonce` over hash if you can, as `hash` will interfere with streaming SSR in the future.

plugins/claude/svelte/skills/svelte-core-bestpractices/references/snippet.md

@@ -0,0 +1,276 @@
+```svelte
+<!--- copy: false  --->
+{#snippet name()}...{/snippet}
+```
+
+```svelte
+<!--- copy: false  --->
+{#snippet name(param1, param2, paramN)}...{/snippet}
+```
+
+Snippets, and [render tags](@render), are a way to create reusable chunks of markup inside your components. Instead of writing duplicative code like this...
+
+```svelte
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			<figure>
+				<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+				<figcaption>{image.caption}</figcaption>
+			</figure>
+		</a>
+	{:else}
+		<figure>
+			<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+			<figcaption>{image.caption}</figcaption>
+		</figure>
+	{/if}
+{/each}
+```
+
+...you can write this:
+
+```svelte
+{#snippet figure(image)}
+	<figure>
+		<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+		<figcaption>{image.caption}</figcaption>
+	</figure>
+{/snippet}
+
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			{@render figure(image)}
+		</a>
+	{:else}
+		{@render figure(image)}
+	{/if}
+{/each}
+```
+
+Like function declarations, snippets can have an arbitrary number of parameters, which can have default values, and you can destructure each parameter. You cannot use rest parameters, however.
+
+## Snippet scope
+
+Snippets can be declared anywhere inside your component. They can reference values declared outside themselves, for example in the `<script>` tag or in `{#each ...}` blocks (demo...
+
+```svelte
+<script>
+	let { message = `it's great to see you!` } = $props();
+</script>
+
+{#snippet hello(name)}
+	<p>hello {name}! {message}!</p>
+{/snippet}
+
+{@render hello('alice')}
+{@render hello('bob')}
+```
+
+...and they are 'visible' to everything in the same lexical scope (i.e. siblings, and children of those siblings):
+
+```svelte
+<div>
+	{#snippet x()}
+		{#snippet y()}...{/snippet}
+
+		<!-- this is fine -->
+		{@render y()}
+	{/snippet}
+
+	<!-- this will error, as `y` is not in scope -->
+	{@render y()}
+</div>
+
+<!-- this will also error, as `x` is not in scope -->
+{@render x()}
+```
+
+Snippets can reference themselves and each other (demo:
+
+```svelte
+{#snippet blastoff()}
+	<span>🚀</span>
+{/snippet}
+
+{#snippet countdown(n)}
+	{#if n > 0}
+		<span>{n}...</span>
+		{@render countdown(n - 1)}
+	{:else}
+		{@render blastoff()}
+	{/if}
+{/snippet}
+
+{@render countdown(10)}
+```
+
+## Passing snippets to components
+
+### Explicit props
+
+Within the template, snippets are values just like any other. As such, they can be passed to components as props (demo:
+
+```svelte
+<script>
+	import Table from './Table.svelte';
+
+	const fruits = [
+		{ name: 'apples', qty: 5, price: 2 },
+		{ name: 'bananas', qty: 10, price: 1 },
+		{ name: 'cherries', qty: 20, price: 0.5 },
+	];
+</script>
+
+{#snippet header()}
+	<th>fruit</th>
+	<th>qty</th>
+	<th>price</th>
+	<th>total</th>
+{/snippet}
+
+{#snippet row(d)}
+	<td>{d.name}</td>
+	<td>{d.qty}</td>
+	<td>{d.price}</td>
+	<td>{d.qty * d.price}</td>
+{/snippet}
+
+<Table data={fruits} {header} {row} />
+```
+
+Think about it like passing content instead of data to a component. The concept is similar to slots in web components.
+
+### Implicit props
+
+As an authoring convenience, snippets declared directly _inside_ a component implicitly become props _on_ the component (demo:
+
+```svelte
+<!-- this is semantically the same as the above -->
+<Table data={fruits}>
+	{#snippet header()}
+		<th>fruit</th>
+		<th>qty</th>
+		<th>price</th>
+		<th>total</th>
+	{/snippet}
+
+	{#snippet row(d)}
+		<td>{d.name}</td>
+		<td>{d.qty}</td>
+		<td>{d.price}</td>
+		<td>{d.qty * d.price}</td>
+	{/snippet}
+</Table>
+```
+
+### Implicit `children` snippet
+
+Any content inside the component tags that is _not_ a snippet declaration implicitly becomes part of the `children` snippet (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<Button>click me</Button>
+```
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	let { children } = $props();
+</script>
+
+<!-- result will be <button>click me</button> -->
+<button>{@render children()}</button>
+```
+
+> [!NOTE] Note that you cannot have a prop called `children` if you also have content inside the component — for this reason, you should avoid having props with that name
+
+### Optional snippet props
+
+You can declare snippet props as being optional. You can either use optional chaining to not render anything if the snippet isn't set...
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{@render children?.()}
+```
+
+...or use an `#if` block to render fallback content:
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{#if children}
+	{@render children()}
+{:else}
+	fallback content
+{/if}
+```
+
+## Typing snippets
+
+Snippets implement the `Snippet` interface imported from `'svelte'`:
+
+```svelte
+<script lang="ts">
+	import type { Snippet } from 'svelte';
+
+	interface Props {
+		data: any[];
+		children: Snippet;
+		row: Snippet<[any]>;
+	}
+
+	let { data, children, row }: Props = $props();
+</script>
+```
+
+With this change, red squigglies will appear if you try and use the component without providing a `data` prop and a `row` snippet. Notice that the type argument provided to `Snippet` is a tuple, since snippets can have multiple parameters.
+
+We can tighten things up further by declaring a generic, so that `data` and `row` refer to the same type:
+
+```svelte
+<script lang="ts" generics="T">
+	import type { Snippet } from 'svelte';
+
+	let {
+		data,
+		children,
+		row,
+	}: {
+		data: T[];
+		children: Snippet;
+		row: Snippet<[T]>;
+	} = $props();
+</script>
+```
+
+## Exporting snippets
+
+Snippets declared at the top level of a `.svelte` file can be exported from a `<script module>` for use in other components, provided they don't reference any declarations in a non-module `<script>` (whether directly or indirectly, via other snippets) (demo:
+
+```svelte
+<script module>
+	export { add };
+</script>
+
+{#snippet add(a, b)}
+	{a} + {b} = {a + b}
+{/snippet}
+```
+
+> [!NOTE]
+> This requires Svelte 5.5.0 or newer
+
+## Programmatic snippets
+
+Snippets can be created programmatically with the [`createRawSnippet`](svelte#createRawSnippet) API. This is intended for advanced use cases.
+
+## Snippets and slots
+
+In Svelte 4, content can be passed to components using [slots](legacy-slots). Snippets are more powerful and flexible, and so slots have been deprecated in Svelte 5.

plugins/claude/svelte/skills/svelte-core-bestpractices/references/svelte-reactivity.md

@@ -0,0 +1,61 @@
+## createSubscriber
+
+<blockquote class="since note">
+
+Available since 5.7.0
+
+</blockquote>
+
+Returns a `subscribe` function that integrates external event-based systems with Svelte's reactivity.
+It's particularly useful for integrating with web APIs like `MediaQuery`, `IntersectionObserver`, or `WebSocket`.
+
+If `subscribe` is called inside an effect (including indirectly, for example inside a getter),
+the `start` callback will be called with an `update` function. Whenever `update` is called, the effect re-runs.
+
+If `start` returns a cleanup function, it will be called when the effect is destroyed.
+
+If `subscribe` is called in multiple effects, `start` will only be called once as long as the effects
+are active, and the returned teardown function will only be called when all effects are destroyed.
+
+It's best understood with an example. Here's an implementation of [`MediaQuery`](/docs/svelte/svelte-reactivity#MediaQuery):
+
+```js
+// @errors: 7031
+import { createSubscriber } from 'svelte/reactivity';
+import { on } from 'svelte/events';
+
+export class MediaQuery {
+	#query;
+	#subscribe;
+
+	constructor(query) {
+		this.#query = window.matchMedia(`(${query})`);
+
+		this.#subscribe = createSubscriber((update) => {
+			// when the `change` event occurs, re-run any effects that read `this.current`
+			const off = on(this.#query, 'change', update);
+
+			// stop listening when all the effects are destroyed
+			return () => off();
+		});
+	}
+
+	get current() {
+		// This makes the getter reactive, if read in an effect
+		this.#subscribe();
+
+		// Return the current state of the query, whether or not we're in an effect
+		return this.#query.matches;
+	}
+}
+```
+
+<div class="ts-block">
+
+```dts
+function createSubscriber(
+	start: (update: () => void) => (() => void) | void
+): () => void;
+```
+
+</div>

plugins/cursor/svelte/.cursor-plugin/plugin.json

@@ -0,0 +1,9 @@
+{
+	"name": "svelte",
+	"description": "A plugin for all things related to Svelte development, MCP, skills, and more.",
+	"version": "1.0.4",
+	"author": {
+		"name": "Svelte"
+	},
+	"keywords": ["svelte", "sveltekit", "mcp", "autofixer"]
+}

plugins/cursor/svelte/.mcp.json

@@ -0,0 +1,8 @@
+{
+	"mcpServers": {
+		"svelte": {
+			"type": "http",
+			"url": "https://mcp.svelte.dev/mcp"
+		}
+	}
+}

plugins/cursor/svelte/agents/svelte-file-editor.md

@@ -0,0 +1,67 @@
+---
+name: svelte-file-editor
+description: Specialized Svelte 5 code editor. MUST BE USED PROACTIVELY when creating, editing, or reviewing any .svelte file or .svelte.ts/.svelte.js module and MUST use the tools from the MCP server or the `svelte-file-editor` skill if they are available. Fetches relevant documentation and validates code using the Svelte MCP server tools.
+---
+
+You are a Svelte 5 expert responsible for writing, editing, and validating Svelte components and modules. You have access to the Svelte MCP server which provides documentation and code analysis tools. Always use the tools from the svelte MCP server to fetch documentation with `get_documentation` and validating the code with `svelte_autofixer`. If the autofixer returns any issue or suggestions try to solve them.
+
+If the MCP tools are not available you can use the `svelte-code-writer` skill to learn how to use the `@sveltejs/mcp` cli to access the same tools.
+
+If the skill is not available you can run `npx @sveltejs/mcp@latest -y --help` to learn how to use it.
+
+## Available MCP Tools
+
+### 1. list-sections
+
+Lists all available Svelte 5 and SvelteKit documentation sections with titles and paths. Use this first to discover what documentation is available.
+
+### 2. get-documentation
+
+Retrieves full documentation for specified sections. Accepts a single section name or an array of section names. Use after `list-sections` to fetch relevant docs for the task at hand.
+
+**Example sections:** `$state`, `$derived`, `$effect`, `$props`, `$bindable`, `snippets`, `routing`, `load functions`
+
+### 3. svelte-autofixer
+
+Analyzes Svelte code and returns suggestions to fix issues. Pass the component code directly to this tool. It will detect common mistakes like:
+
+- Using `$effect` instead of `$derived` for computations
+- Missing cleanup in effects
+- Svelte 4 syntax (`on:click`, `export let`, `<slot>`)
+- Missing keys in `{#each}` blocks
+- And more
+
+## Workflow
+
+When invoked to work on a Svelte file:
+
+### 1. Gather Context (if needed)
+
+If you're uncertain about Svelte 5 syntax or patterns, use the MCP tools:
+
+1. Call `list-sections` to see available documentation
+2. Call `get-documentation` with relevant section names
+
+### 2. Read the Target File
+
+Read the file to understand the current implementation.
+
+### 3. Make Changes
+
+Apply edits following Svelte 5 best practices:
+
+### 4. Validate Changes
+
+After editing, ALWAYS call `svelte-autofixer` with the updated code to check for issues.
+
+### 5. Fix Any Issues
+
+If the autofixer reports problems, fix them and re-validate until no issues remain.
+
+## Output Format
+
+After completing your work, provide:
+
+1. Summary of changes made
+2. Any issues found and fixed by the autofixer
+3. Recommendations for further improvements (if any)

plugins/cursor/svelte/rules/svelte-mcp-tools.mdc

@@ -0,0 +1,28 @@
+---
+description: Instructions for using the Svelte MCP server tools for documentation lookup, code analysis, and validation
+alwaysApply: true
+---
+
+You are able to use the Svelte MCP server, where you have access to comprehensive Svelte 5 and SvelteKit documentation. Here's how to use the available tools effectively:
+
+## Available Svelte MCP Tools:
+
+### 1. list-sections
+
+Use this FIRST to discover all available documentation sections. Returns a structured list with titles, use_cases, and paths.
+When asked about Svelte or SvelteKit topics, ALWAYS use this tool at the start of the chat to find relevant sections.
+
+### 2. get-documentation
+
+Retrieves full documentation content for specific sections. Accepts single or multiple sections.
+After calling the list-sections tool, you MUST analyze the returned documentation sections (especially the use_cases field) and then use the get-documentation tool to fetch ALL documentation sections that are relevant for the user's task.
+
+### 3. svelte-autofixer
+
+Analyzes Svelte code and returns issues and suggestions.
+You MUST use this tool whenever writing Svelte code before sending it to the user. Keep calling it until no issues or suggestions are returned.
+
+### 4. playground-link
+
+Generates a Svelte Playground link with the provided code.
+After completing the code, ask the user if they want a playground link. Only call this tool after user confirmation and NEVER if code was written to files in their project.

plugins/cursor/svelte/skills/svelte-code-writer/SKILL.md

@@ -0,0 +1,66 @@
+---
+name: svelte-code-writer
+description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
+---
+
+# Svelte 5 Code Writer
+
+## CLI Tools
+
+You have access to `@sveltejs/mcp` CLI for Svelte-specific assistance. Use these commands via `npx`:
+
+### List Documentation Sections
+
+```bash
+npx @sveltejs/mcp list-sections
+```
+
+Lists all available Svelte 5 and SvelteKit documentation sections with titles and paths.
+
+### Get Documentation
+
+```bash
+npx @sveltejs/mcp get-documentation "<section1>,<section2>,..."
+```
+
+Retrieves full documentation for specified sections. Use after `list-sections` to fetch relevant docs.
+
+**Example:**
+
+```bash
+npx @sveltejs/mcp get-documentation "$state,$derived,$effect"
+```
+
+### Svelte Autofixer
+
+```bash
+npx @sveltejs/mcp svelte-autofixer "<code_or_path>" [options]
+```
+
+Analyzes Svelte code and suggests fixes for common issues.
+
+**Options:**
+
+- `--async` - Enable async Svelte mode (default: false)
+- `--svelte-version` - Target version: 4 or 5 (default: 5)
+
+**Examples:**
+
+```bash
+# Analyze inline code (escape $ as \$)
+npx @sveltejs/mcp svelte-autofixer '<script>let count = \$state(0);</script>'
+
+# Analyze a file
+npx @sveltejs/mcp svelte-autofixer ./src/lib/Component.svelte
+
+# Target Svelte 4
+npx @sveltejs/mcp svelte-autofixer ./Component.svelte --svelte-version 4
+```
+
+**Important:** When passing code with runes (`$state`, `$derived`, etc.) via the terminal, escape the `$` character as `\$` to prevent shell variable substitution.
+
+## Workflow
+
+1. **Uncertain about syntax?** Run `list-sections` then `get-documentation` for relevant topics
+2. **Reviewing/debugging?** Run `svelte-autofixer` on the code to detect issues
+3. **Always validate** - Run `svelte-autofixer` before finalizing any Svelte component

plugins/cursor/svelte/skills/svelte-core-bestpractices/SKILL.md

@@ -0,0 +1,176 @@
+---
+name: svelte-core-bestpractices
+description: Guidance on writing fast, robust, modern Svelte code. Load this skill whenever in a Svelte project and asked to write/edit or analyze a Svelte component or module. Covers reactivity, event handling, styling, integration with libraries and more.
+---
+
+## `$state`
+
+Only use the `$state` rune for variables that should be _reactive_ — in other words, variables that cause an `$effect`, `$derived` or template expression to update. Everything else can be a normal variable.
+
+Objects and arrays (`$state({...})` or `$state([...])`) are made deeply reactive, meaning mutation will trigger updates. This has a trade-off: in exchange for fine-grained reactivity, the objects must be proxied, which has performance overhead. In cases where you're dealing with large objects that are only ever reassigned (rather than mutated), use `$state.raw` instead. This is often the case with API responses, for example.
+
+## `$derived`
+
+To compute something from state, use `$derived` rather than `$effect`:
+
+```js
+// do this
+let square = $derived(num * num);
+
+// don't do this
+let square;
+
+$effect(() => {
+	square = num * num;
+});
+```
+
+> [!NOTE] `$derived` is given an expression, _not_ a function. If you need to use a function (because the expression is complex, for example) use `$derived.by`.
+
+Deriveds are writable — you can assign to them, just like `$state`, except that they will re-evaluate when their expression changes.
+
+If the derived expression is an object or array, it will be returned as-is — it is _not_ made deeply reactive. You can, however, use `$state` inside `$derived.by` in the rare cases that you need this.
+
+## `$effect`
+
+Effects are an escape hatch and should mostly be avoided. In particular, avoid updating state inside effects.
+
+- If you need to sync state to an external library such as D3, it is often neater to use [`{@attach ...}`](references/@attach.md)
+- If you need to run some code in response to user interaction, put the code directly in an event handler or use a [function binding](references/bind.md) as appropriate
+- If you need to log values for debugging purposes, use [`$inspect`](references/$inspect.md)
+- If you need to observe something external to Svelte, use [`createSubscriber`](references/svelte-reactivity.md)
+
+Never wrap the contents of an effect in `if (browser) {...}` or similar — effects do not run on the server.
+
+## `$props`
+
+Treat props as though they will change. For example, values that depend on props should usually use `$derived`:
+
+```js
+// @errors: 2451
+let { type } = $props();
+
+// do this
+let color = $derived(type === 'danger' ? 'red' : 'green');
+
+// don't do this — `color` will not update if `type` changes
+let color = type === 'danger' ? 'red' : 'green';
+```
+
+## `$inspect.trace`
+
+`$inspect.trace` is a debugging tool for reactivity. If something is not updating properly or running more than it should you can add `$inspect.trace(label)` as the first line of an `$effect` or `$derived.by` (or any function they call) to trace their dependencies and discover which one triggered an update.
+
+## Events
+
+Any element attribute starting with `on` is treated as an event listener:
+
+```svelte
+<button onclick={() => {...}}>click me</button>
+
+<!-- attribute shorthand also works -->
+<button {onclick}>...</button>
+
+<!-- so do spread attributes -->
+<button {...props}>...</button>
+```
+
+If you need to attach listeners to `window` or `document` you can use `<svelte:window>` and `<svelte:document>`:
+
+```svelte
+<svelte:window onkeydown={...} />
+<svelte:document onvisibilitychange={...} />
+```
+
+Avoid using `onMount` or `$effect` for this.
+
+## Snippets
+
+[Snippets](references/snippet.md) are a way to define reusable chunks of markup that can be instantiated with the [`{@render ...}`](references/@render.md) tag, or passed to components as props. They must be declared within the template.
+
+```svelte
+{#snippet greeting(name)}
+	<p>hello {name}!</p>
+{/snippet}
+
+{@render greeting('world')}
+```
+
+> [!NOTE] Snippets declared at the top level of a component (i.e. not inside elements or blocks) can be referenced inside `<script>`. A snippet that doesn't reference component state is also available in a `<script module>`, in which case it can be exported for use by other components.
+
+## Each blocks
+
+Prefer to use [keyed each blocks](references/each.md) — this improves performance by allowing Svelte to surgically insert or remove items rather than updating the DOM belonging to existing items.
+
+> [!NOTE] The key _must_ uniquely identify the object. Do not use the index as a key.
+
+Avoid destructuring if you need to mutate the item (with something like `bind:value={item.count}`, for example).
+
+## Using JavaScript variables in CSS
+
+If you have a JS variable that you want to use inside CSS you can set a CSS custom property with the `style:` directive.
+
+```svelte
+<div style:--columns={columns}>...</div>
+```
+
+You can then reference `var(--columns)` inside the component's `<style>`.
+
+## Styling child components
+
+The CSS in a component's `<style>` is scoped to that component. If a parent component needs to control the child's styles, the preferred way is to use CSS custom properties:
+
+```svelte
+<!-- Parent.svelte -->
+<Child --color="red" />
+
+<!-- Child.svelte -->
+<h1>Hello</h1>
+
+<style>
+	h1 {
+		color: var(--color);
+	}
+</style>
+```
+
+If this is impossible (for example, the child component comes from a library) you can use `:global` to override styles:
+
+```svelte
+<div>
+	<Child />
+</div>
+
+<style>
+	div :global {
+		h1 {
+			color: red;
+		}
+	}
+</style>
+```
+
+## Context
+
+Consider using context instead of declaring state in a shared module. This will scope the state to the part of the app that needs it, and eliminate the possibility of it leaking between users when server-side rendering.
+
+Use `createContext` rather than `setContext` and `getContext`, as it provides type safety.
+
+## Async Svelte
+
+If using version 5.36 or higher, you can use [await expressions](references/await-expressions.md) and [hydratable](references/hydratable.md) to use promises directly inside components. Note that these require the `experimental.async` option to be enabled in `svelte.config.js` as they are not yet considered fully stable.
+
+## Avoid legacy features
+
+Always use runes mode for new code, and avoid features that have more modern replacements:
+
+- use `$state` instead of implicit reactivity (e.g. `let count = 0; count += 1`)
+- use `$derived` and `$effect` instead of `$:` assignments and statements (but only use effects when there is no better solution)
+- use `$props` instead of `export let`, `$$props` and `$$restProps`
+- use `onclick={...}` instead of `on:click={...}`
+- use `{#snippet ...}` and `{@render ...}` instead of `<slot>` and `$$slots` and `<svelte:fragment>`
+- use `<DynamicComponent>` instead of `<svelte:component this={DynamicComponent}>`
+- use `import Self from './ThisComponent.svelte'` and `<Self>` instead of `<svelte:self>`
+- use classes with `$state` fields to share reactivity between components, instead of using stores
+- use `{@attach ...}` instead of `use:action`
+- use clsx-style arrays and objects in `class` attributes, instead of the `class:` directive

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/$inspect.md

@@ -0,0 +1,53 @@
+> [!NOTE] `$inspect` only works during development. In a production build it becomes a noop.
+
+The `$inspect` rune is roughly equivalent to `console.log`, with the exception that it will re-run whenever its argument changes. `$inspect` tracks reactive state deeply, meaning that updating something inside an object or array using fine-grained reactivity will cause it to re-fire (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+	let message = $state('hello');
+
+	$inspect(count, message); // will console.log when `count` or `message` change
+</script>
+
+<button onclick={() => count++}>Increment</button>
+<input bind:value={message} />
+```
+
+On updates, a stack trace will be printed, making it easy to find the origin of a state change (unless you're in the playground, due to technical limitations).
+
+## $inspect(...).with
+
+`$inspect` returns a property `with`, which you can invoke with a callback, which will then be invoked instead of `console.log`. The first argument to the callback is either `"init"` or `"update"`; subsequent arguments are the values passed to `$inspect` (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+
+	$inspect(count).with((type, count) => {
+		if (type === 'update') {
+			debugger; // or `console.trace`, or whatever you want
+		}
+	});
+</script>
+
+<button onclick={() => count++}>Increment</button>
+```
+
+## $inspect.trace(...)
+
+This rune, added in 5.14, causes the surrounding function to be _traced_ in development. Any time the function re-runs as part of an [effect]($effect) or a [derived]($derived), information will be printed to the console about which pieces of reactive state caused the effect to fire.
+
+```svelte
+<script>
+	import { doSomeWork } from './elsewhere';
+
+	$effect(() => {
+		+++// $inspect.trace must be the first statement of a function body+++
+		+++$inspect.trace();+++
+		doSomeWork();
+	});
+</script>
+```
+
+`$inspect.trace` takes an optional first argument which will be used as the label.

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/@attach.md

@@ -0,0 +1,166 @@
+Attachments are functions that run in an [effect]($effect) when an element is mounted to the DOM or when [state]($state) read inside the function updates.
+
+Optionally, they can return a function that is called before the attachment re-runs, or after the element is later removed from the DOM.
+
+> [!NOTE]
+> Attachments are available in Svelte 5.29 and newer.
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	/** @type {import('svelte/attachments').Attachment} */
+	function myAttachment(element) {
+		console.log(element.nodeName); // 'DIV'
+
+		return () => {
+			console.log('cleaning up');
+		};
+	}
+</script>
+
+<div {@attach myAttachment}>...</div>
+```
+
+An element can have any number of attachments.
+
+## Attachment factories
+
+A useful pattern is for a function, such as `tooltip` in this example, to _return_ an attachment (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<button {@attach tooltip(content)}> Hover me </button>
+```
+
+Since the `tooltip(content)` expression runs inside an [effect]($effect), the attachment will be destroyed and recreated whenever `content` changes. The same thing would happen for any state read _inside_ the attachment function when it first runs. (If this isn't what you want, see [Controlling when attachments re-run](#Controlling-when-attachments-re-run).)
+
+## Inline attachments
+
+Attachments can also be created inline (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<canvas
+	width={32}
+	height={32}
+	{@attach (canvas) => {
+		const context = canvas.getContext('2d');
+
+		$effect(() => {
+			context.fillStyle = color;
+			context.fillRect(0, 0, canvas.width, canvas.height);
+		});
+	}}
+></canvas>
+```
+
+> [!NOTE]
+> The nested effect runs whenever `color` changes, while the outer effect (where `canvas.getContext(...)` is called) only runs once, since it doesn't read any reactive state.
+
+## Conditional attachments
+
+Falsy values like `false` or `undefined` are treated as no attachment, enabling conditional usage:
+
+```svelte
+<div {@attach enabled && myAttachment}>...</div>
+```
+
+## Passing attachments to components
+
+When used on a component, `{@attach ...}` will create a prop whose key is a [`Symbol`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol). If the component then [spreads](/tutorial/svelte/spread-props) props onto an element, the element will receive those attachments.
+
+This allows you to create _wrapper components_ that augment elements (demo:
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	/** @type {import('svelte/elements').HTMLButtonAttributes} */
+	let { children, ...props } = $props();
+</script>
+
+<!-- `props` includes attachments -->
+<button {...props}>
+	{@render children?.()}
+</button>
+```
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+	import Button from './Button.svelte';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<Button {@attach tooltip(content)}>Hover me</Button>
+```
+
+## Controlling when attachments re-run
+
+Attachments, unlike [actions](use), are fully reactive: `{@attach foo(bar)}` will re-run on changes to `foo` _or_ `bar` (or any state read inside `foo`):
+
+```js
+// @errors: 7006 2304 2552
+function foo(bar) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+		update(node, bar);
+	};
+}
+```
+
+In the rare case that this is a problem (for example, if `foo` does expensive and unavoidable setup work) consider passing the data inside a function and reading it in a child effect:
+
+```js
+// @errors: 7006 2304 2552
+function foo(+++getBar+++) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+
++++		$effect(() => {
+			update(node, getBar());
+		});+++
+	}
+}
+```
+
+## Creating attachments programmatically
+
+To add attachments to an object that will be spread onto a component or element, use [`createAttachmentKey`](svelte-attachments#createAttachmentKey).
+
+## Converting actions to attachments
+
+If you're using a library that only provides actions, you can convert them to attachments with [`fromAction`](svelte-attachments#fromAction), allowing you to (for example) use them with components.

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/@render.md

@@ -0,0 +1,35 @@
+To render a [snippet](snippet), use a `{@render ...}` tag.
+
+```svelte
+{#snippet sum(a, b)}
+	<p>{a} + {b} = {a + b}</p>
+{/snippet}
+
+{@render sum(1, 2)}
+{@render sum(3, 4)}
+{@render sum(5, 6)}
+```
+
+The expression can be an identifier like `sum`, or an arbitrary JavaScript expression:
+
+```svelte
+{@render (cool ? coolSnippet : lameSnippet)()}
+```
+
+## Optional snippets
+
+If the snippet is potentially undefined — for example, because it's an incoming prop — then you can use optional chaining to only render it when it _is_ defined:
+
+```svelte
+{@render children?.()}
+```
+
+Alternatively, use an [`{#if ...}`](if) block with an `:else` clause to render fallback content:
+
+```svelte
+{#if children}
+	{@render children()}
+{:else}
+	<p>fallback content</p>
+{/if}
+```

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/await-expressions.md

@@ -0,0 +1,180 @@
+As of Svelte 5.36, you can use the `await` keyword inside your components in three places where it was previously unavailable:
+
+- at the top level of your component's `<script>`
+- inside `$derived(...)` declarations
+- inside your markup
+
+This feature is currently experimental, and you must opt in by adding the `experimental.async` option wherever you [configure](/docs/kit/configuration) Svelte, usually `svelte.config.js`:
+
+```js
+/// file: svelte.config.js
+export default {
+	compilerOptions: {
+		experimental: {
+			async: true,
+		},
+	},
+};
+```
+
+The experimental flag will be removed in Svelte 6.
+
+## Synchronized updates
+
+When an `await` expression depends on a particular piece of state, changes to that state will not be reflected in the UI until the asynchronous work has completed, so that the UI is not left in an inconsistent state. In other words, in an example like this...
+
+```svelte
+<script>
+	let a = $state(1);
+	let b = $state(2);
+
+	async function add(a, b) {
+		await new Promise((f) => setTimeout(f, 500)); // artificial delay
+		return a + b;
+	}
+</script>
+
+<input type="number" bind:value={a} />
+<input type="number" bind:value={b} />
+
+<p>{a} + {b} = {await add(a, b)}</p>
+```
+
+...if you increment `a`, the contents of the `<p>` will _not_ immediately update to read this —
+
+```html
+<p>2 + 2 = 3</p>
+```
+
+— instead, the text will update to `2 + 2 = 4` when `add(a, b)` resolves.
+
+Updates can overlap — a fast update will be reflected in the UI while an earlier slow update is still ongoing.
+
+## Concurrency
+
+Svelte will do as much asynchronous work as it can in parallel. For example if you have two `await` expressions in your markup...
+
+```svelte
+<p>{await one()}</p><p>{await two()}</p>
+```
+
+...both functions will run at the same time, as they are independent expressions, even though they are _visually_ sequential.
+
+This does not apply to sequential `await` expressions inside your `<script>` or inside async functions — these run like any other asynchronous JavaScript. An exception is that independent `$derived` expressions will update independently, even though they will run sequentially when they are first created:
+
+```js
+// these will run sequentially the first time,
+// but will update independently
+let a = $derived(await one());
+let b = $derived(await two());
+```
+
+> [!NOTE] If you write code like this, expect Svelte to give you an [`await_waterfall`](runtime-warnings#Client-warnings-await_waterfall) warning
+
+## Indicating loading states
+
+To render placeholder UI, you can wrap content in a `<svelte:boundary>` with a [`pending`](svelte-boundary#Properties-pending) snippet. This will be shown when the boundary is first created, but not for subsequent updates, which are globally coordinated.
+
+After the contents of a boundary have resolved for the first time and have replaced the `pending` snippet, you can detect subsequent async work with [`$effect.pending()`]($effect#$effect.pending). This is what you would use to display a "we're asynchronously validating your input" spinner next to a form field, for example.
+
+You can also use [`settled()`](svelte#settled) to get a promise that resolves when the current update is complete:
+
+```js
+import { tick, settled } from 'svelte';
+
+async function onclick() {
+	updating = true;
+
+	// without this, the change to `updating` will be
+	// grouped with the other changes, meaning it
+	// won't be reflected in the UI
+	await tick();
+
+	color = 'octarine';
+	answer = 42;
+
+	await settled();
+
+	// any updates affected by `color` or `answer`
+	// have now been applied
+	updating = false;
+}
+```
+
+## Error handling
+
+Errors in `await` expressions will bubble to the nearest [error boundary](svelte-boundary).
+
+## Server-side rendering
+
+Svelte supports asynchronous server-side rendering (SSR) with the `render(...)` API. To use it, simply await the return value:
+
+```js
+/// file: server.js
+import { render } from 'svelte/server';
+import App from './App.svelte';
+
+const { head, body } = +++await+++ render(App);
+```
+
+> [!NOTE] If you're using a framework like SvelteKit, this is done on your behalf.
+
+If a `<svelte:boundary>` with a `pending` snippet is encountered during SSR, that snippet will be rendered while the rest of the content is ignored. All `await` expressions encountered outside boundaries with `pending` snippets will resolve and render their contents prior to `await render(...)` returning.
+
+> [!NOTE] In the future, we plan to add a streaming implementation that renders the content in the background.
+
+## Forking
+
+The [`fork(...)`](svelte#fork) API, added in 5.42, makes it possible to run `await` expressions that you _expect_ to happen in the near future. This is mainly intended for frameworks like SvelteKit to implement preloading when (for example) users signal an intent to navigate.
+
+```svelte
+<script>
+	import { fork } from 'svelte';
+	import Menu from './Menu.svelte';
+
+	let open = $state(false);
+
+	/** @type {import('svelte').Fork | null} */
+	let pending = null;
+
+	function preload() {
+		pending ??= fork(() => {
+			open = true;
+		});
+	}
+
+	function discard() {
+		pending?.discard();
+		pending = null;
+	}
+</script>
+
+<button
+	onfocusin={preload}
+	onfocusout={discard}
+	onpointerenter={preload}
+	onpointerleave={discard}
+	onclick={() => {
+		pending?.commit();
+		pending = null;
+
+		// in case `pending` didn't exist
+		// (if it did, this is a no-op)
+		open = true;
+	}}>open menu</button
+>
+
+{#if open}
+	<!-- any async work inside this component will start
+	     as soon as the fork is created -->
+	<Menu onclose={() => (open = false)} />
+{/if}
+```
+
+## Caveats
+
+As an experimental feature, the details of how `await` is handled (and related APIs like `$effect.pending()`) are subject to breaking changes outside of a semver major release, though we intend to keep such changes to a bare minimum.
+
+## Breaking changes
+
+Effects run in a slightly different order when the `experimental.async` option is `true`. Specifically, _block_ effects like `{#if ...}` and `{#each ...}` now run before an `$effect.pre` or `beforeUpdate` in the same component, which means that in very rare situations.

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/bind.md

@@ -0,0 +1,16 @@
+## Function bindings
+
+You can also use `bind:property={get, set}`, where `get` and `set` are functions, allowing you to perform validation and transformation:
+
+```svelte
+<input bind:value={() => value, (v) => (value = v.toLowerCase())} />
+```
+
+In the case of readonly bindings like [dimension bindings](#Dimensions), the `get` value should be `null`:
+
+```svelte
+<div bind:clientWidth={null, redraw} bind:clientHeight={null, redraw}>...</div>
+```
+
+> [!NOTE]
+> Function bindings are available in Svelte 5.9.0 and newer.

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/each.md

@@ -0,0 +1,42 @@
+## Keyed each blocks
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name (key)}...{/each}
+```
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name, index (key)}...{/each}
+```
+
+If a _key_ expression is provided — which must uniquely identify each list item — Svelte will use it to intelligently update the list when data changes by inserting, moving and deleting items, rather than adding or removing items at the end and updating the state in the middle.
+
+The key can be any object, but strings and numbers are recommended since they allow identity to persist when the objects themselves change.
+
+```svelte
+{#each items as item (item.id)}
+	<li>{item.name} x {item.qty}</li>
+{/each}
+
+<!-- or with additional index value -->
+{#each items as item, i (item.id)}
+	<li>{i + 1}: {item.name} x {item.qty}</li>
+{/each}
+```
+
+You can freely use destructuring and rest patterns in each blocks.
+
+```svelte
+{#each items as { id, name, qty }, i (id)}
+	<li>{i + 1}: {name} x {qty}</li>
+{/each}
+
+{#each objects as { id, ...rest }}
+	<li><span>{id}</span><MyComponent {...rest} /></li>
+{/each}
+
+{#each items as [id, ...rest]}
+	<li><span>{id}</span><MyComponent values={rest} /></li>
+{/each}
+```

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/hydratable.md

@@ -0,0 +1,100 @@
+In Svelte, when you want to render asynchronous content data on the server, you can simply `await` it. This is great! However, it comes with a pitfall: when hydrating that content on the client, Svelte has to redo the asynchronous work, which blocks hydration for however long it takes:
+
+```svelte
+<script>
+	import { getUser } from 'my-database-library';
+
+	// This will get the user on the server, render the user's name into the h1,
+	// and then, during hydration on the client, it will get the user _again_,
+	// blocking hydration until it's done.
+	const user = await getUser();
+</script>
+
+<h1>{user.name}</h1>
+```
+
+That's silly, though. If we've already done the hard work of getting the data on the server, we don't want to get it again during hydration on the client. `hydratable` is a low-level API built to solve this problem. You probably won't need this very often — it will be used behind the scenes by whatever datafetching library you use. For example, it powers [remote functions in SvelteKit](/docs/kit/remote-functions).
+
+To fix the example above:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	import { getUser } from 'my-database-library';
+
+	// During server rendering, this will serialize and stash the result of `getUser`, associating
+	// it with the provided key and baking it into the `head` content. During hydration, it will
+	// look for the serialized version, returning it instead of running `getUser`. After hydration
+	// is done, if it's called again, it'll simply invoke `getUser`.
+	const user = await hydratable('user', () => getUser());
+</script>
+
+<h1>{user.name}</h1>
+```
+
+This API can also be used to provide access to random or time-based values that are stable between server rendering and hydration. For example, to get a random number that doesn't update on hydration:
+
+```ts
+import { hydratable } from 'svelte';
+const rand = hydratable('random', () => Math.random());
+```
+
+If you're a library author, be sure to prefix the keys of your `hydratable` values with the name of your library so that your keys don't conflict with other libraries.
+
+## Serialization
+
+All data returned from a `hydratable` function must be serializable. But this doesn't mean you're limited to JSON — Svelte uses [`devalue`](https://npmjs.com/package/devalue), which can serialize all sorts of things including `Map`, `Set`, `URL`, and `BigInt`. Check the documentation page for a full list. In addition to these, thanks to some Svelte magic, you can also fearlessly use promises:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	const promises = hydratable('random', () => {
+		return {
+			one: Promise.resolve(1),
+			two: Promise.resolve(2),
+		};
+	});
+</script>
+
+{await promises.one}
+{await promises.two}
+```
+
+## CSP
+
+`hydratable` adds an inline `<script>` block to the `head` returned from `render`. If you're using [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CSP) (CSP), this script will likely fail to run. You can provide a `nonce` to `render`:
+
+```js
+const nonce = crypto.randomUUID();
+
+const { head, body } = await render(App, {
+	csp: { nonce },
+});
+```
+
+This will add the `nonce` to the script block, on the assumption that you will later add the same nonce to the CSP header of the document that contains it:
+
+```js
+response.headers.set('Content-Security-Policy', `script-src 'nonce-${nonce}'`);
+```
+
+It's essential that a `nonce` — which, British slang definition aside, means 'number used once' — is only used when dynamically server rendering an individual response.
+
+If instead you are generating static HTML ahead of time, you must use hashes instead:
+
+```js
+const { head, body, hashes } = await render(App, {
+	csp: { hash: true },
+});
+```
+
+`hashes.script` will be an array of strings like `["sha256-abcd123"]`. As with `nonce`, the hashes should be used in your CSP header:
+
+```js
+response.headers.set(
+	'Content-Security-Policy',
+	`script-src ${hashes.script.map((hash) => `'${hash}'`).join(' ')}`,
+);
+```
+
+We recommend using `nonce` over hash if you can, as `hash` will interfere with streaming SSR in the future.

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/snippet.md

@@ -0,0 +1,276 @@
+```svelte
+<!--- copy: false  --->
+{#snippet name()}...{/snippet}
+```
+
+```svelte
+<!--- copy: false  --->
+{#snippet name(param1, param2, paramN)}...{/snippet}
+```
+
+Snippets, and [render tags](@render), are a way to create reusable chunks of markup inside your components. Instead of writing duplicative code like this...
+
+```svelte
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			<figure>
+				<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+				<figcaption>{image.caption}</figcaption>
+			</figure>
+		</a>
+	{:else}
+		<figure>
+			<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+			<figcaption>{image.caption}</figcaption>
+		</figure>
+	{/if}
+{/each}
+```
+
+...you can write this:
+
+```svelte
+{#snippet figure(image)}
+	<figure>
+		<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+		<figcaption>{image.caption}</figcaption>
+	</figure>
+{/snippet}
+
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			{@render figure(image)}
+		</a>
+	{:else}
+		{@render figure(image)}
+	{/if}
+{/each}
+```
+
+Like function declarations, snippets can have an arbitrary number of parameters, which can have default values, and you can destructure each parameter. You cannot use rest parameters, however.
+
+## Snippet scope
+
+Snippets can be declared anywhere inside your component. They can reference values declared outside themselves, for example in the `<script>` tag or in `{#each ...}` blocks (demo...
+
+```svelte
+<script>
+	let { message = `it's great to see you!` } = $props();
+</script>
+
+{#snippet hello(name)}
+	<p>hello {name}! {message}!</p>
+{/snippet}
+
+{@render hello('alice')}
+{@render hello('bob')}
+```
+
+...and they are 'visible' to everything in the same lexical scope (i.e. siblings, and children of those siblings):
+
+```svelte
+<div>
+	{#snippet x()}
+		{#snippet y()}...{/snippet}
+
+		<!-- this is fine -->
+		{@render y()}
+	{/snippet}
+
+	<!-- this will error, as `y` is not in scope -->
+	{@render y()}
+</div>
+
+<!-- this will also error, as `x` is not in scope -->
+{@render x()}
+```
+
+Snippets can reference themselves and each other (demo:
+
+```svelte
+{#snippet blastoff()}
+	<span>🚀</span>
+{/snippet}
+
+{#snippet countdown(n)}
+	{#if n > 0}
+		<span>{n}...</span>
+		{@render countdown(n - 1)}
+	{:else}
+		{@render blastoff()}
+	{/if}
+{/snippet}
+
+{@render countdown(10)}
+```
+
+## Passing snippets to components
+
+### Explicit props
+
+Within the template, snippets are values just like any other. As such, they can be passed to components as props (demo:
+
+```svelte
+<script>
+	import Table from './Table.svelte';
+
+	const fruits = [
+		{ name: 'apples', qty: 5, price: 2 },
+		{ name: 'bananas', qty: 10, price: 1 },
+		{ name: 'cherries', qty: 20, price: 0.5 },
+	];
+</script>
+
+{#snippet header()}
+	<th>fruit</th>
+	<th>qty</th>
+	<th>price</th>
+	<th>total</th>
+{/snippet}
+
+{#snippet row(d)}
+	<td>{d.name}</td>
+	<td>{d.qty}</td>
+	<td>{d.price}</td>
+	<td>{d.qty * d.price}</td>
+{/snippet}
+
+<Table data={fruits} {header} {row} />
+```
+
+Think about it like passing content instead of data to a component. The concept is similar to slots in web components.
+
+### Implicit props
+
+As an authoring convenience, snippets declared directly _inside_ a component implicitly become props _on_ the component (demo:
+
+```svelte
+<!-- this is semantically the same as the above -->
+<Table data={fruits}>
+	{#snippet header()}
+		<th>fruit</th>
+		<th>qty</th>
+		<th>price</th>
+		<th>total</th>
+	{/snippet}
+
+	{#snippet row(d)}
+		<td>{d.name}</td>
+		<td>{d.qty}</td>
+		<td>{d.price}</td>
+		<td>{d.qty * d.price}</td>
+	{/snippet}
+</Table>
+```
+
+### Implicit `children` snippet
+
+Any content inside the component tags that is _not_ a snippet declaration implicitly becomes part of the `children` snippet (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<Button>click me</Button>
+```
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	let { children } = $props();
+</script>
+
+<!-- result will be <button>click me</button> -->
+<button>{@render children()}</button>
+```
+
+> [!NOTE] Note that you cannot have a prop called `children` if you also have content inside the component — for this reason, you should avoid having props with that name
+
+### Optional snippet props
+
+You can declare snippet props as being optional. You can either use optional chaining to not render anything if the snippet isn't set...
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{@render children?.()}
+```
+
+...or use an `#if` block to render fallback content:
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{#if children}
+	{@render children()}
+{:else}
+	fallback content
+{/if}
+```
+
+## Typing snippets
+
+Snippets implement the `Snippet` interface imported from `'svelte'`:
+
+```svelte
+<script lang="ts">
+	import type { Snippet } from 'svelte';
+
+	interface Props {
+		data: any[];
+		children: Snippet;
+		row: Snippet<[any]>;
+	}
+
+	let { data, children, row }: Props = $props();
+</script>
+```
+
+With this change, red squigglies will appear if you try and use the component without providing a `data` prop and a `row` snippet. Notice that the type argument provided to `Snippet` is a tuple, since snippets can have multiple parameters.
+
+We can tighten things up further by declaring a generic, so that `data` and `row` refer to the same type:
+
+```svelte
+<script lang="ts" generics="T">
+	import type { Snippet } from 'svelte';
+
+	let {
+		data,
+		children,
+		row,
+	}: {
+		data: T[];
+		children: Snippet;
+		row: Snippet<[T]>;
+	} = $props();
+</script>
+```
+
+## Exporting snippets
+
+Snippets declared at the top level of a `.svelte` file can be exported from a `<script module>` for use in other components, provided they don't reference any declarations in a non-module `<script>` (whether directly or indirectly, via other snippets) (demo:
+
+```svelte
+<script module>
+	export { add };
+</script>
+
+{#snippet add(a, b)}
+	{a} + {b} = {a + b}
+{/snippet}
+```
+
+> [!NOTE]
+> This requires Svelte 5.5.0 or newer
+
+## Programmatic snippets
+
+Snippets can be created programmatically with the [`createRawSnippet`](svelte#createRawSnippet) API. This is intended for advanced use cases.
+
+## Snippets and slots
+
+In Svelte 4, content can be passed to components using [slots](legacy-slots). Snippets are more powerful and flexible, and so slots have been deprecated in Svelte 5.

plugins/cursor/svelte/skills/svelte-core-bestpractices/references/svelte-reactivity.md

@@ -0,0 +1,61 @@
+## createSubscriber
+
+<blockquote class="since note">
+
+Available since 5.7.0
+
+</blockquote>
+
+Returns a `subscribe` function that integrates external event-based systems with Svelte's reactivity.
+It's particularly useful for integrating with web APIs like `MediaQuery`, `IntersectionObserver`, or `WebSocket`.
+
+If `subscribe` is called inside an effect (including indirectly, for example inside a getter),
+the `start` callback will be called with an `update` function. Whenever `update` is called, the effect re-runs.
+
+If `start` returns a cleanup function, it will be called when the effect is destroyed.
+
+If `subscribe` is called in multiple effects, `start` will only be called once as long as the effects
+are active, and the returned teardown function will only be called when all effects are destroyed.
+
+It's best understood with an example. Here's an implementation of [`MediaQuery`](/docs/svelte/svelte-reactivity#MediaQuery):
+
+```js
+// @errors: 7031
+import { createSubscriber } from 'svelte/reactivity';
+import { on } from 'svelte/events';
+
+export class MediaQuery {
+	#query;
+	#subscribe;
+
+	constructor(query) {
+		this.#query = window.matchMedia(`(${query})`);
+
+		this.#subscribe = createSubscriber((update) => {
+			// when the `change` event occurs, re-run any effects that read `this.current`
+			const off = on(this.#query, 'change', update);
+
+			// stop listening when all the effects are destroyed
+			return () => off();
+		});
+	}
+
+	get current() {
+		// This makes the getter reactive, if read in an effect
+		this.#subscribe();
+
+		// Return the current state of the query, whether or not we're in an effect
+		return this.#query.matches;
+	}
+}
+```
+
+<div class="ts-block">
+
+```dts
+function createSubscriber(
+	start: (update: () => void) => (() => void) | void
+): () => void;
+```
+
+</div>

pnpm-lock.yaml

@@ -123,8 +123,8 @@ catalogs:
       specifier: ^1.5.0
       version: 1.5.0
     '@vercel/analytics':
-      specifier: ^1.5.0
-      version: 1.6.1
+      specifier: ^2.0.0
+      version: 2.0.1
     dotenv:
       specifier: ^17.2.3
       version: 17.2.3
@@ -192,7 +192,7 @@ importers:
         version: 10.1.8(eslint@9.39.2)
       eslint-plugin-import:
         specifier: catalog:lint
-        version: 2.32.0(@typescript-eslint/parser@8.54.0(eslint@9.39.2)(typescript@5.9.3))(eslint@9.39.2)
+        version: 2.32.0(eslint@9.39.2)
       eslint-plugin-pnpm:
         specifier: catalog:lint
         version: 1.5.0(eslint@9.39.2)
@@ -237,7 +237,7 @@ importers:
         version: 0.8.4(tmcp@1.19.2(typescript@5.9.3))
       '@vercel/analytics':
         specifier: catalog:tooling
-        version: 1.6.1(@sveltejs/kit@2.50.1(@sveltejs/vite-plugin-svelte@6.2.4(svelte@5.48.4)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(svelte@5.48.4)(typescript@5.9.3)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(react@18.3.1)(svelte@5.48.4)
+        version: 2.0.1(@sveltejs/kit@2.50.1(@sveltejs/vite-plugin-svelte@6.2.4(svelte@5.48.4)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(svelte@5.48.4)(typescript@5.9.3)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(react@18.3.1)(svelte@5.48.4)
       tmcp:
         specifier: catalog:tmcp
         version: 1.19.2(typescript@5.9.3)
@@ -2171,12 +2171,13 @@ packages:
     peerDependencies:
       valibot: ^1.2.0
 
-  '@vercel/analytics@1.6.1':
-    resolution: {integrity: sha512-oH9He/bEM+6oKlv3chWuOOcp8Y6fo6/PSro8hEkgCW3pu9/OiCXiUpRUogDh3Fs3LH2sosDrx8CxeOLBEE+afg==}
+  '@vercel/analytics@2.0.1':
+    resolution: {integrity: sha512-MTQG6V9qQrt1tsDeF+2Uoo5aPjqbVPys1xvnIftXSJYG2SrwXRHnqEvVoYID7BTruDz4lCd2Z7rM1BdkUehk2g==}
     peerDependencies:
       '@remix-run/react': ^2
       '@sveltejs/kit': ^1 || ^2
       next: '>= 13'
+      nuxt: '>= 3'
       react: ^18 || ^19 || ^19.0.0-rc
       svelte: '>= 4'
       vue: ^3
@@ -2188,6 +2189,8 @@ packages:
         optional: true
       next:
         optional: true
+      nuxt:
+        optional: true
       react:
         optional: true
       svelte:
@@ -4179,6 +4182,7 @@ packages:
   tar@7.5.7:
     resolution: {integrity: sha512-fov56fJiRuThVFXD6o6/Q354S7pnWMJIVlDBYijsTNx6jKSE4pvrDTs6lUnmGvNyfJwFQQwWy3owKz1ucIhveQ==}
     engines: {node: '>=18'}
+    deprecated: Old versions of tar are not supported, and contain widely publicized security vulnerabilities, which have been fixed in the current version. Please update. Support for old versions may be purchased (at exorbitant rates) by contacting i@izs.me
 
   term-size@2.2.1:
     resolution: {integrity: sha512-wK0Ri4fOGjv/XPy8SBHZChl8CM7uMc5VML7SqiQ0zG7+J5Vr+RMQDoHa2CNT6KHUnTGIXH34UDMkPzAUyapBZg==}
@@ -6169,7 +6173,7 @@ snapshots:
     dependencies:
       valibot: 1.2.0(typescript@5.9.3)
 
-  '@vercel/analytics@1.6.1(@sveltejs/kit@2.50.1(@sveltejs/vite-plugin-svelte@6.2.4(svelte@5.48.4)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(svelte@5.48.4)(typescript@5.9.3)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(react@18.3.1)(svelte@5.48.4)':
+  '@vercel/analytics@2.0.1(@sveltejs/kit@2.50.1(@sveltejs/vite-plugin-svelte@6.2.4(svelte@5.48.4)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(svelte@5.48.4)(typescript@5.9.3)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(react@18.3.1)(svelte@5.48.4)':
     optionalDependencies:
       '@sveltejs/kit': 2.50.1(@sveltejs/vite-plugin-svelte@6.2.4(svelte@5.48.4)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2)))(svelte@5.48.4)(typescript@5.9.3)(vite@7.3.1(@types/node@24.10.9)(yaml@2.8.2))
       react: 18.3.1
@@ -6842,17 +6846,16 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  eslint-module-utils@2.12.1(@typescript-eslint/parser@8.54.0(eslint@9.39.2)(typescript@5.9.3))(eslint-import-resolver-node@0.3.9)(eslint@9.39.2):
+  eslint-module-utils@2.12.1(eslint-import-resolver-node@0.3.9)(eslint@9.39.2):
     dependencies:
       debug: 3.2.7
     optionalDependencies:
-      '@typescript-eslint/parser': 8.54.0(eslint@9.39.2)(typescript@5.9.3)
       eslint: 9.39.2
       eslint-import-resolver-node: 0.3.9
     transitivePeerDependencies:
       - supports-color
 
-  eslint-plugin-import@2.32.0(@typescript-eslint/parser@8.54.0(eslint@9.39.2)(typescript@5.9.3))(eslint@9.39.2):
+  eslint-plugin-import@2.32.0(eslint@9.39.2):
     dependencies:
       '@rtsao/scc': 1.1.0
       array-includes: 3.1.9
@@ -6863,7 +6866,7 @@ snapshots:
       doctrine: 2.1.0
       eslint: 9.39.2
       eslint-import-resolver-node: 0.3.9
-      eslint-module-utils: 2.12.1(@typescript-eslint/parser@8.54.0(eslint@9.39.2)(typescript@5.9.3))(eslint-import-resolver-node@0.3.9)(eslint@9.39.2)
+      eslint-module-utils: 2.12.1(eslint-import-resolver-node@0.3.9)(eslint@9.39.2)
       hasown: 2.0.2
       is-core-module: 2.16.1
       is-glob: 4.0.3
@@ -6874,8 +6877,6 @@ snapshots:
       semver: 6.3.1
       string.prototype.trimend: 1.0.9
       tsconfig-paths: 3.15.0
-    optionalDependencies:
-      '@typescript-eslint/parser': 8.54.0(eslint@9.39.2)(typescript@5.9.3)
     transitivePeerDependencies:
       - eslint-import-resolver-typescript
       - eslint-import-resolver-webpack

pnpm-workspace.yaml

@@ -46,7 +46,7 @@ catalogs:
     '@types/estree': ^1.0.8
     '@types/node': ^24.3.1
     '@valibot/to-json-schema': ^1.5.0
-    '@vercel/analytics': ^1.5.0
+    '@vercel/analytics': ^2.0.0
     dotenv: ^17.2.3
     node-resolve-ts: ^1.0.2
     publint: ^0.3.13

scripts/bump-plugin-versions.ts

@@ -0,0 +1,54 @@
+import fs from 'node:fs/promises';
+import { execSync } from 'node:child_process';
+
+interface PluginJson {
+	name: string;
+	version: string;
+	[key: string]: unknown;
+}
+
+const PLUGINS = [
+	{
+		name: 'Claude',
+		diff_path: 'plugins/claude/svelte/',
+		json_path: './plugins/claude/svelte/.claude-plugin/plugin.json',
+	},
+	{
+		name: 'Cursor',
+		diff_path: 'plugins/cursor/svelte/',
+		json_path: './plugins/cursor/svelte/.cursor-plugin/plugin.json',
+	},
+];
+
+function has_changes(diff_path: string): boolean {
+	try {
+		execSync(`git diff --exit-code ${diff_path}`, { stdio: 'pipe' });
+		return false;
+	} catch {
+		return true;
+	}
+}
+
+function bump_patch(version: string): string {
+	const parts = version.split('.');
+	if (parts.length !== 3) {
+		throw new Error(`Invalid semver: ${version}`);
+	}
+	const [major, minor, patch] = parts;
+	return `${major}.${minor}.${Number(patch) + 1}`;
+}
+
+for (const plugin of PLUGINS) {
+	if (!has_changes(plugin.diff_path)) {
+		console.log(`No changes in ${plugin.name} plugin, skipping version bump`);
+		continue;
+	}
+
+	const raw = await fs.readFile(plugin.json_path, 'utf-8');
+	const json: PluginJson = JSON.parse(raw);
+	const old_version = json.version;
+	json.version = bump_patch(old_version);
+
+	await fs.writeFile(plugin.json_path, JSON.stringify(json, null, '\t') + '\n');
+	console.log(`Bumped ${plugin.name} plugin: ${old_version} -> ${json.version}`);
+}

scripts/resolve-references.ts

@@ -0,0 +1,276 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { parseArgs } from 'node:util';
+
+const { values } = parseArgs({
+	options: {
+		file: { type: 'string', short: 'f' },
+		repo: { type: 'string', short: 'r' },
+		output: { type: 'string', short: 'o' },
+	},
+});
+
+const { file, repo, output } = values;
+
+if (!file || !repo || !output) {
+	console.error(
+		'Usage: resolve-references --file <path-or-content> --repo <repo> --output <folder>',
+	);
+	process.exit(1);
+}
+
+export function remove_llm_ignore_blocks(content: string): string {
+	return content.replace(/<!--\s*llm-ignore-start\s*-->[\s\S]*?<!--\s*llm-ignore-end\s*-->/g, '');
+}
+
+/**
+ * Determines whether the input string is a file path or raw markdown content.
+ * If it's a file, reads and returns its content. Otherwise returns the string as-is.
+ */
+async function get_content(input: string) {
+	try {
+		const stat = await fs.stat(input);
+		if (stat.isFile()) {
+			return await fs.readFile(input, 'utf-8');
+		}
+	} catch {
+		// not a file path — treat as raw content
+	}
+	return input;
+}
+
+/**
+ * Extracts a section from markdown content based on a heading id (hash).
+ * Finds the heading whose text (lowercased, spaces replaced with `-`) matches
+ * the hash and returns everything from that heading up to the next heading of
+ * the same or higher level.
+ */
+function extract_section(content: string, hash: string) {
+	const lines = content.split('\n');
+	let start_index = -1;
+	let heading_level = 0;
+
+	for (let i = 0; i < lines.length; i++) {
+		const line = lines[i]!;
+		const heading_match = line.match(/^(#{1,6})\s+(.+)/);
+		if (!heading_match) continue;
+
+		const level = heading_match[1]!.length;
+		const text = heading_match[2]!;
+		const slug = text.toLowerCase().replace(/\s+/g, '-');
+
+		if (slug === hash.toLowerCase()) {
+			start_index = i;
+			heading_level = level;
+			continue;
+		}
+
+		if (start_index !== -1 && level <= heading_level) {
+			return lines.slice(start_index, i).join('\n').trim();
+		}
+	}
+
+	if (start_index !== -1) {
+		return lines.slice(start_index).join('\n').trim();
+	}
+
+	return content;
+}
+
+/**
+ * Removes the `title`, `skill`, and `NOTE` fields from markdown frontmatter, if present.
+ * Removes the entire frontmatter block if they were the only fields.
+ */
+function remove_frontmatter_unneeded_fields(content: string) {
+	const frontmatter_match = content.match(/^---\n([\s\S]*?)\n---\n?/);
+	if (!frontmatter_match) return content;
+
+	const frontmatter = frontmatter_match[1]!;
+	const lines = frontmatter.split('\n').filter((line) => !line.match(/^(title|skill|NOTE)\s*:/));
+
+	if (lines.length === 0) {
+		// frontmatter is now empty — remove the whole block
+		return content.slice(frontmatter_match[0].length);
+	}
+
+	return `---\n${lines.join('\n')}\n---\n` + content.slice(frontmatter_match[0].length);
+}
+
+/**
+ * Derives a file-safe name from a URL path segment.
+ * e.g. "some/deep/path" -> "path"
+ */
+function derive_name(link: string) {
+	const without_hash = link.split('#')[0]!;
+	const segments = without_hash.split('/').filter(Boolean);
+	return segments[segments.length - 1] ?? 'reference';
+}
+
+const content = remove_llm_ignore_blocks(
+	remove_frontmatter_unneeded_fields(await get_content(file)),
+);
+
+// Match markdown links that are either:
+// 1. Relative paths (not starting with http://, https://, mailto:, #, or /)
+// 2. Absolute /docs/ paths (e.g. /docs/svelte/each)
+const relative_link_regex = /\[([^\]]*)\]\((?!https?:\/\/|mailto:|#|\/)([^)]+)\)/g;
+const docs_link_regex = /\[([^\]]*)\]\((\/docs\/[^)]+)\)/g;
+
+interface Link_Info {
+	full_match: string;
+	text: string;
+	href: string;
+	hash: string | undefined;
+	clean_path: string;
+	is_absolute_docs: boolean;
+}
+
+const links: Link_Info[] = [];
+
+let match;
+while ((match = relative_link_regex.exec(content)) !== null) {
+	const href = match[2]!;
+	const hash_index = href.indexOf('#');
+	const has_hash = hash_index !== -1;
+
+	links.push({
+		full_match: match[0],
+		text: match[1]!,
+		href,
+		hash: has_hash ? href.slice(hash_index + 1) : undefined,
+		clean_path: has_hash ? href.slice(0, hash_index) : href,
+		is_absolute_docs: false,
+	});
+}
+
+while ((match = docs_link_regex.exec(content)) !== null) {
+	const href = match[2]!;
+	const hash_index = href.indexOf('#');
+	const has_hash = hash_index !== -1;
+
+	links.push({
+		full_match: match[0],
+		text: match[1]!,
+		href,
+		hash: has_hash ? href.slice(hash_index + 1) : undefined,
+		clean_path: has_hash ? href.slice(0, hash_index) : href,
+		is_absolute_docs: true,
+	});
+}
+
+if (links.length === 0) {
+	console.log('No relative links found in the markdown.');
+	process.exit(0);
+}
+
+console.log(`Found ${links.length} relative link(s) to resolve.`);
+
+const references_dir = path.join(output, 'references');
+await fs.mkdir(references_dir, { recursive: true });
+
+let updated_content = content;
+
+// Track names we've already used to avoid collisions
+const used_names = new Map<string, number>();
+
+for (const link of links) {
+	const base_name = derive_name(link.clean_path);
+	const count = used_names.get(base_name) ?? 0;
+	used_names.set(base_name, count + 1);
+	const name = count > 0 ? `${base_name}-${count}` : base_name;
+
+	// For absolute /docs/ links, fetch directly from svelte.dev (supports cross-repo links).
+	// For relative links, prepend /docs/{repo}/.
+	const url = link.is_absolute_docs
+		? `https://svelte.dev${link.clean_path}/llms.txt`
+		: `https://svelte.dev/docs/${repo}/${link.clean_path}/llms.txt`;
+
+	console.log(`Fetching: ${url}${link.hash ? ` (section: #${link.hash})` : ''}`);
+
+	try {
+		const response = await fetch(url);
+
+		if (!response.ok) {
+			console.warn(`  Warning: ${response.status} ${response.statusText} for ${url}`);
+			continue;
+		}
+
+		let fetched_content = await response.text();
+
+		if (link.hash) {
+			fetched_content = extract_section(fetched_content, link.hash);
+		}
+
+		const ref_filename = `${name}.md`;
+		const ref_path = path.join(references_dir, ref_filename);
+
+		await fs.writeFile(ref_path, remove_llm_ignore_blocks(remove_cut_preambles(fetched_content)));
+		console.log(`  Saved: references/${ref_filename}`);
+
+		// Replace the link in the markdown
+		const new_link = `[${link.text}](references/${ref_filename})`;
+		updated_content = updated_content.replace(link.full_match, new_link);
+	} catch (error) {
+		console.warn(`  Error fetching ${url}:`, error);
+	}
+}
+
+/**
+ * In fenced code blocks, removes everything from the start of the block
+ * up to and including a `// ---cut---` comment. If no such comment exists
+ * the code block is left unchanged.
+ */
+function remove_cut_preambles(content: string) {
+	const lines = content.split('\n');
+	const result: string[] = [];
+	let in_code_block = false;
+	let code_block_buffer: string[] = [];
+	let fence_line = '';
+
+	for (const line of lines) {
+		if (!in_code_block && line.match(/^```\w*$/)) {
+			in_code_block = true;
+			fence_line = line;
+			code_block_buffer = [];
+			continue;
+		}
+
+		if (in_code_block && line.match(/^```$/)) {
+			// End of code block — check if there was a cut comment
+			const cut_index = code_block_buffer.findIndex((l) => l.match(/^\s*\/\/\s*---cut---\s*$/));
+
+			result.push(fence_line);
+			if (cut_index !== -1) {
+				result.push(...code_block_buffer.slice(cut_index + 1));
+			} else {
+				result.push(...code_block_buffer);
+			}
+			result.push(line);
+
+			in_code_block = false;
+			code_block_buffer = [];
+			continue;
+		}
+
+		if (in_code_block) {
+			code_block_buffer.push(line);
+		} else {
+			result.push(line);
+		}
+	}
+
+	// If file ends mid-code-block, flush as-is
+	if (in_code_block) {
+		result.push(fence_line);
+		result.push(...code_block_buffer);
+	}
+
+	return result.join('\n');
+}
+
+// Write the updated markdown content to the output folder
+updated_content = remove_cut_preambles(updated_content);
+
+const output_filename = path.join(output, 'SKILL.md');
+await fs.writeFile(output_filename, updated_content);
+console.log(`\nUpdated markdown written to: ${output_filename}`);

scripts/sync-claude-plugin.ts

@@ -0,0 +1,55 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+const CLAUDE_PLUGIN_DIR = './plugins/claude/svelte';
+const TOOLS_DIR = './tools';
+
+/**
+ * Sync skills from tools/ to Claude plugin (direct copy)
+ */
+async function sync_skills() {
+	const source = path.join(TOOLS_DIR, 'skills');
+	const dest = path.join(CLAUDE_PLUGIN_DIR, 'skills');
+
+	await fs.rm(dest, { recursive: true, force: true });
+	await fs.cp(source, dest, { recursive: true });
+
+	console.log('Synced skills to Claude plugin');
+}
+
+/**
+ * Sync agent definitions from tools/ to Claude plugin,
+ * adding Claude-specific frontmatter fields (permissionMode: acceptEdits)
+ */
+async function sync_agents() {
+	const source = path.join(TOOLS_DIR, 'agents');
+	const dest = path.join(CLAUDE_PLUGIN_DIR, 'agents');
+
+	await fs.rm(dest, { recursive: true, force: true });
+	await fs.mkdir(dest, { recursive: true });
+
+	const files = await fs.readdir(source);
+
+	for (const file of files) {
+		if (!file.endsWith('.md')) continue;
+
+		const content = await fs.readFile(path.join(source, file), 'utf-8');
+
+		// Add Claude-specific frontmatter fields
+		const transformed = content.replace(
+			/^(---\n)([\s\S]*?)(---\n)/m,
+			(_match, open, frontmatter, close) => {
+				return `${open}${(frontmatter as string).trimEnd()}\npermissionMode: acceptEdits\n${close}`;
+			},
+		);
+
+		await fs.writeFile(path.join(dest, file), transformed);
+	}
+
+	console.log('Synced agents to Claude plugin');
+}
+
+await sync_skills();
+await sync_agents();
+
+console.log('Claude plugin sync complete');

scripts/sync-cursor-plugin.ts

@@ -0,0 +1,85 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+const CURSOR_PLUGIN_DIR = './plugins/cursor/svelte';
+const TOOLS_PLUGIN_DIR = './tools';
+const AGENTS_MD_PATH = './tools/instructions/AGENTS.md';
+
+/**
+ * Sync skills from Claude plugin to Cursor plugin (direct copy)
+ */
+async function sync_skills() {
+	const source = path.join(TOOLS_PLUGIN_DIR, 'skills');
+	const dest = path.join(CURSOR_PLUGIN_DIR, 'skills');
+
+	await fs.rm(dest, { recursive: true, force: true });
+	await fs.cp(source, dest, { recursive: true });
+
+	console.log('Synced skills to Cursor plugin');
+}
+
+/**
+ * Sync agent definition from Claude plugin to Cursor plugin,
+ * stripping Claude-specific frontmatter fields (permissionMode)
+ */
+async function sync_agents() {
+	const source = path.join(TOOLS_PLUGIN_DIR, 'agents');
+	const dest = path.join(CURSOR_PLUGIN_DIR, 'agents');
+
+	await fs.rm(dest, { recursive: true, force: true });
+	await fs.mkdir(dest, { recursive: true });
+
+	const files = await fs.readdir(source);
+
+	for (const file of files) {
+		if (!file.endsWith('.md')) continue;
+
+		const content = await fs.readFile(path.join(source, file), 'utf-8');
+
+		// Strip Claude-specific frontmatter fields
+		const transformed = content.replace(
+			/^(---\n)([\s\S]*?)(---\n)/m,
+			(_match, open, frontmatter, close) => {
+				const filtered_lines = (frontmatter as string)
+					.split('\n')
+					.filter((line: string) => !line.startsWith('permissionMode:'))
+					.join('\n');
+				return `${open}${filtered_lines}${close}`;
+			},
+		);
+
+		await fs.writeFile(path.join(dest, file), transformed);
+	}
+
+	console.log('Synced agents to Cursor plugin');
+}
+
+/**
+ * Sync AGENTS.md instructions as a Cursor rule (.mdc file with frontmatter)
+ */
+async function sync_rules() {
+	const dest = path.join(CURSOR_PLUGIN_DIR, 'rules');
+
+	await fs.rm(dest, { recursive: true, force: true });
+	await fs.mkdir(dest, { recursive: true });
+
+	const agents_content = await fs.readFile(AGENTS_MD_PATH, 'utf-8');
+
+	const rule_content = `---
+description: Instructions for using the Svelte MCP server tools for documentation lookup, code analysis, and validation
+alwaysApply: true
+---
+
+${agents_content.trim()}
+`;
+
+	await fs.writeFile(path.join(dest, 'svelte-mcp-tools.mdc'), rule_content);
+
+	console.log('Synced rules to Cursor plugin');
+}
+
+await sync_skills();
+await sync_agents();
+await sync_rules();
+
+console.log('Cursor plugin sync complete');

scripts/sync-opencode-plugin.ts

@@ -0,0 +1,113 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+const OPENCODE_PKG_DIR = './packages/opencode';
+const TOOLS_DIR = './tools';
+const DOCS_AGENTS_DIR = './documentation/docs/10-introduction/.generated';
+
+/**
+ * Sync skills from tools/ to opencode package (direct copy)
+ */
+async function sync_skills() {
+	const source = path.join(TOOLS_DIR, 'skills');
+	const dest = path.join(OPENCODE_PKG_DIR, 'skills');
+
+	await fs.rm(dest, { recursive: true, force: true });
+	await fs.cp(source, dest, { recursive: true });
+
+	console.log('Synced skills to opencode package');
+}
+
+/**
+ * Sync AGENTS.md from tools/ to opencode package and documentation site
+ */
+async function sync_agents_md() {
+	const source = path.join(TOOLS_DIR, 'instructions', 'AGENTS.md');
+	const opencode_dest = path.join(OPENCODE_PKG_DIR, 'instructions', 'opencode-agents.md');
+	const docs_dest = path.join(DOCS_AGENTS_DIR, 'agents.md');
+
+	await fs.mkdir(path.dirname(opencode_dest), { recursive: true });
+	await fs.mkdir(DOCS_AGENTS_DIR, { recursive: true });
+
+	const content = await fs.readFile(source, 'utf-8');
+
+	await fs.writeFile(opencode_dest, content);
+	await fs.writeFile(docs_dest, content);
+
+	console.log('Synced AGENTS.md to opencode package and documentation');
+}
+
+interface AgentData {
+	name: string;
+	description: string;
+	prompt: string;
+}
+
+/**
+ * Parse a markdown agent file with frontmatter (name, description) and body (prompt)
+ */
+function parse_agent_md(content: string, file_path: string): AgentData | null {
+	const frontmatter_match = content.match(/^---\n([\s\S]*?)\n---\n([\s\S]*)$/);
+	if (!frontmatter_match) {
+		console.warn(`Skipping ${file_path}: no frontmatter found`);
+		return null;
+	}
+
+	const frontmatter = frontmatter_match[1] ?? '';
+	const body = (frontmatter_match[2] ?? '').trim();
+
+	const name = frontmatter.match(/^name:\s*(.+)$/m)?.[1]?.trim();
+	const description = frontmatter.match(/^description:\s*(.+)$/m)?.[1]?.trim();
+
+	if (!name || !description) {
+		console.warn(`Skipping ${file_path}: missing name or description in frontmatter`);
+		return null;
+	}
+
+	return { name, description, prompt: body };
+}
+
+/**
+ * Generate agents.ts module from tools/agents/*.md files
+ */
+async function sync_agents() {
+	const agents_dir = path.join(TOOLS_DIR, 'agents');
+	const entries = await fs.readdir(agents_dir, { withFileTypes: true });
+	const md_files = entries.filter((e) => e.isFile() && e.name.endsWith('.md'));
+
+	const agents: AgentData[] = [];
+
+	for (const file of md_files) {
+		const file_path = path.join(agents_dir, file.name);
+		const content = await fs.readFile(file_path, 'utf-8');
+		const agent = parse_agent_md(content, file_path);
+		if (agent) {
+			agents.push(agent);
+		}
+	}
+
+	const output = [
+		'// This file is auto-generated by scripts/sync-opencode-plugin.ts',
+		'// Do not edit manually — edit the markdown files in tools/agents/ instead.',
+		'',
+		`export const agents = ${JSON.stringify(
+			Object.fromEntries(
+				agents.map((a) => [a.name, { description: a.description, prompt: a.prompt }]),
+			),
+			null,
+			'\t',
+		)} as const;`,
+		'',
+	].join('\n');
+
+	const dest = path.join(OPENCODE_PKG_DIR, 'agents.ts');
+	await fs.writeFile(dest, output);
+
+	console.log(`Generated agents.ts with ${agents.length} agent(s)`);
+}
+
+await sync_skills();
+await sync_agents_md();
+await sync_agents();
+
+console.log('OpenCode plugin sync complete');

scripts/update-docs-prompts.ts

@@ -18,9 +18,11 @@ ${module.docs_description}
 <details>
 	<summary>Copy the prompt</summary>
 
-\`\`\`md
+<!-- prettier-ignore-start -->
+\`\`\`\`markdown
 ${await module.generate_for_docs()}
-\`\`\`
+\`\`\`\`
+<!-- prettier-ignore-end -->
 
 </details>
 

scripts/update-docs-skills.ts

@@ -46,7 +46,7 @@ function parse_frontmatter(
 
 let content = '';
 
-const skills_dir = './plugins/svelte/skills';
+const skills_dir = './tools/skills';
 const skill_dirs = (await fs.readdir(skills_dir)).filter((name) => !name.startsWith('.'));
 
 for (const skill_name of skill_dirs) {
@@ -68,7 +68,7 @@ for (const skill_name of skill_dirs) {
 
 ${frontmatter.description}
 
-<a href="https://github.com/sveltejs/mcp/releases?q=${frontmatter.name}" target="_blank" rel="noopener noreferrer">Open Releases page</a>
+<a href="https://github.com/sveltejs/ai-tools/releases?q=${frontmatter.name}" target="_blank" rel="noopener noreferrer">Open Releases page</a>
 
 <details>
 	<summary>View skill content</summary>

tools/agents/svelte-file-editor.md

@@ -0,0 +1,67 @@
+---
+name: svelte-file-editor
+description: Specialized Svelte 5 code editor. MUST BE USED PROACTIVELY when creating, editing, or reviewing any .svelte file or .svelte.ts/.svelte.js module and MUST use the tools from the MCP server or the `svelte-file-editor` skill if they are available. Fetches relevant documentation and validates code using the Svelte MCP server tools.
+---
+
+You are a Svelte 5 expert responsible for writing, editing, and validating Svelte components and modules. You have access to the Svelte MCP server which provides documentation and code analysis tools. Always use the tools from the svelte MCP server to fetch documentation with `get_documentation` and validating the code with `svelte_autofixer`. If the autofixer returns any issue or suggestions try to solve them.
+
+If the MCP tools are not available you can use the `svelte-code-writer` skill to learn how to use the `@sveltejs/mcp` cli to access the same tools.
+
+If the skill is not available you can run `npx @sveltejs/mcp@latest -y --help` to learn how to use it.
+
+## Available MCP Tools
+
+### 1. list-sections
+
+Lists all available Svelte 5 and SvelteKit documentation sections with titles and paths. Use this first to discover what documentation is available.
+
+### 2. get-documentation
+
+Retrieves full documentation for specified sections. Accepts a single section name or an array of section names. Use after `list-sections` to fetch relevant docs for the task at hand.
+
+**Example sections:** `$state`, `$derived`, `$effect`, `$props`, `$bindable`, `snippets`, `routing`, `load functions`
+
+### 3. svelte-autofixer
+
+Analyzes Svelte code and returns suggestions to fix issues. Pass the component code directly to this tool. It will detect common mistakes like:
+
+- Using `$effect` instead of `$derived` for computations
+- Missing cleanup in effects
+- Svelte 4 syntax (`on:click`, `export let`, `<slot>`)
+- Missing keys in `{#each}` blocks
+- And more
+
+## Workflow
+
+When invoked to work on a Svelte file:
+
+### 1. Gather Context (if needed)
+
+If you're uncertain about Svelte 5 syntax or patterns, use the MCP tools:
+
+1. Call `list-sections` to see available documentation
+2. Call `get-documentation` with relevant section names
+
+### 2. Read the Target File
+
+Read the file to understand the current implementation.
+
+### 3. Make Changes
+
+Apply edits following Svelte 5 best practices:
+
+### 4. Validate Changes
+
+After editing, ALWAYS call `svelte-autofixer` with the updated code to check for issues.
+
+### 5. Fix Any Issues
+
+If the autofixer reports problems, fix them and re-validate until no issues remain.
+
+## Output Format
+
+After completing your work, provide:
+
+1. Summary of changes made
+2. Any issues found and fixed by the autofixer
+3. Recommendations for further improvements (if any)

tools/skills/svelte-code-writer/SKILL.md

@@ -0,0 +1,66 @@
+---
+name: svelte-code-writer
+description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
+---
+
+# Svelte 5 Code Writer
+
+## CLI Tools
+
+You have access to `@sveltejs/mcp` CLI for Svelte-specific assistance. Use these commands via `npx`:
+
+### List Documentation Sections
+
+```bash
+npx @sveltejs/mcp list-sections
+```
+
+Lists all available Svelte 5 and SvelteKit documentation sections with titles and paths.
+
+### Get Documentation
+
+```bash
+npx @sveltejs/mcp get-documentation "<section1>,<section2>,..."
+```
+
+Retrieves full documentation for specified sections. Use after `list-sections` to fetch relevant docs.
+
+**Example:**
+
+```bash
+npx @sveltejs/mcp get-documentation "$state,$derived,$effect"
+```
+
+### Svelte Autofixer
+
+```bash
+npx @sveltejs/mcp svelte-autofixer "<code_or_path>" [options]
+```
+
+Analyzes Svelte code and suggests fixes for common issues.
+
+**Options:**
+
+- `--async` - Enable async Svelte mode (default: false)
+- `--svelte-version` - Target version: 4 or 5 (default: 5)
+
+**Examples:**
+
+```bash
+# Analyze inline code (escape $ as \$)
+npx @sveltejs/mcp svelte-autofixer '<script>let count = \$state(0);</script>'
+
+# Analyze a file
+npx @sveltejs/mcp svelte-autofixer ./src/lib/Component.svelte
+
+# Target Svelte 4
+npx @sveltejs/mcp svelte-autofixer ./Component.svelte --svelte-version 4
+```
+
+**Important:** When passing code with runes (`$state`, `$derived`, etc.) via the terminal, escape the `$` character as `\$` to prevent shell variable substitution.
+
+## Workflow
+
+1. **Uncertain about syntax?** Run `list-sections` then `get-documentation` for relevant topics
+2. **Reviewing/debugging?** Run `svelte-autofixer` on the code to detect issues
+3. **Always validate** - Run `svelte-autofixer` before finalizing any Svelte component

tools/skills/svelte-core-bestpractices/SKILL.md

@@ -0,0 +1,176 @@
+---
+name: svelte-core-bestpractices
+description: Guidance on writing fast, robust, modern Svelte code. Load this skill whenever in a Svelte project and asked to write/edit or analyze a Svelte component or module. Covers reactivity, event handling, styling, integration with libraries and more.
+---
+
+## `$state`
+
+Only use the `$state` rune for variables that should be _reactive_ — in other words, variables that cause an `$effect`, `$derived` or template expression to update. Everything else can be a normal variable.
+
+Objects and arrays (`$state({...})` or `$state([...])`) are made deeply reactive, meaning mutation will trigger updates. This has a trade-off: in exchange for fine-grained reactivity, the objects must be proxied, which has performance overhead. In cases where you're dealing with large objects that are only ever reassigned (rather than mutated), use `$state.raw` instead. This is often the case with API responses, for example.
+
+## `$derived`
+
+To compute something from state, use `$derived` rather than `$effect`:
+
+```js
+// do this
+let square = $derived(num * num);
+
+// don't do this
+let square;
+
+$effect(() => {
+	square = num * num;
+});
+```
+
+> [!NOTE] `$derived` is given an expression, _not_ a function. If you need to use a function (because the expression is complex, for example) use `$derived.by`.
+
+Deriveds are writable — you can assign to them, just like `$state`, except that they will re-evaluate when their expression changes.
+
+If the derived expression is an object or array, it will be returned as-is — it is _not_ made deeply reactive. You can, however, use `$state` inside `$derived.by` in the rare cases that you need this.
+
+## `$effect`
+
+Effects are an escape hatch and should mostly be avoided. In particular, avoid updating state inside effects.
+
+- If you need to sync state to an external library such as D3, it is often neater to use [`{@attach ...}`](references/@attach.md)
+- If you need to run some code in response to user interaction, put the code directly in an event handler or use a [function binding](references/bind.md) as appropriate
+- If you need to log values for debugging purposes, use [`$inspect`](references/$inspect.md)
+- If you need to observe something external to Svelte, use [`createSubscriber`](references/svelte-reactivity.md)
+
+Never wrap the contents of an effect in `if (browser) {...}` or similar — effects do not run on the server.
+
+## `$props`
+
+Treat props as though they will change. For example, values that depend on props should usually use `$derived`:
+
+```js
+// @errors: 2451
+let { type } = $props();
+
+// do this
+let color = $derived(type === 'danger' ? 'red' : 'green');
+
+// don't do this — `color` will not update if `type` changes
+let color = type === 'danger' ? 'red' : 'green';
+```
+
+## `$inspect.trace`
+
+`$inspect.trace` is a debugging tool for reactivity. If something is not updating properly or running more than it should you can add `$inspect.trace(label)` as the first line of an `$effect` or `$derived.by` (or any function they call) to trace their dependencies and discover which one triggered an update.
+
+## Events
+
+Any element attribute starting with `on` is treated as an event listener:
+
+```svelte
+<button onclick={() => {...}}>click me</button>
+
+<!-- attribute shorthand also works -->
+<button {onclick}>...</button>
+
+<!-- so do spread attributes -->
+<button {...props}>...</button>
+```
+
+If you need to attach listeners to `window` or `document` you can use `<svelte:window>` and `<svelte:document>`:
+
+```svelte
+<svelte:window onkeydown={...} />
+<svelte:document onvisibilitychange={...} />
+```
+
+Avoid using `onMount` or `$effect` for this.
+
+## Snippets
+
+[Snippets](references/snippet.md) are a way to define reusable chunks of markup that can be instantiated with the [`{@render ...}`](references/@render.md) tag, or passed to components as props. They must be declared within the template.
+
+```svelte
+{#snippet greeting(name)}
+	<p>hello {name}!</p>
+{/snippet}
+
+{@render greeting('world')}
+```
+
+> [!NOTE] Snippets declared at the top level of a component (i.e. not inside elements or blocks) can be referenced inside `<script>`. A snippet that doesn't reference component state is also available in a `<script module>`, in which case it can be exported for use by other components.
+
+## Each blocks
+
+Prefer to use [keyed each blocks](references/each.md) — this improves performance by allowing Svelte to surgically insert or remove items rather than updating the DOM belonging to existing items.
+
+> [!NOTE] The key _must_ uniquely identify the object. Do not use the index as a key.
+
+Avoid destructuring if you need to mutate the item (with something like `bind:value={item.count}`, for example).
+
+## Using JavaScript variables in CSS
+
+If you have a JS variable that you want to use inside CSS you can set a CSS custom property with the `style:` directive.
+
+```svelte
+<div style:--columns={columns}>...</div>
+```
+
+You can then reference `var(--columns)` inside the component's `<style>`.
+
+## Styling child components
+
+The CSS in a component's `<style>` is scoped to that component. If a parent component needs to control the child's styles, the preferred way is to use CSS custom properties:
+
+```svelte
+<!-- Parent.svelte -->
+<Child --color="red" />
+
+<!-- Child.svelte -->
+<h1>Hello</h1>
+
+<style>
+	h1 {
+		color: var(--color);
+	}
+</style>
+```
+
+If this is impossible (for example, the child component comes from a library) you can use `:global` to override styles:
+
+```svelte
+<div>
+	<Child />
+</div>
+
+<style>
+	div :global {
+		h1 {
+			color: red;
+		}
+	}
+</style>
+```
+
+## Context
+
+Consider using context instead of declaring state in a shared module. This will scope the state to the part of the app that needs it, and eliminate the possibility of it leaking between users when server-side rendering.
+
+Use `createContext` rather than `setContext` and `getContext`, as it provides type safety.
+
+## Async Svelte
+
+If using version 5.36 or higher, you can use [await expressions](references/await-expressions.md) and [hydratable](references/hydratable.md) to use promises directly inside components. Note that these require the `experimental.async` option to be enabled in `svelte.config.js` as they are not yet considered fully stable.
+
+## Avoid legacy features
+
+Always use runes mode for new code, and avoid features that have more modern replacements:
+
+- use `$state` instead of implicit reactivity (e.g. `let count = 0; count += 1`)
+- use `$derived` and `$effect` instead of `$:` assignments and statements (but only use effects when there is no better solution)
+- use `$props` instead of `export let`, `$$props` and `$$restProps`
+- use `onclick={...}` instead of `on:click={...}`
+- use `{#snippet ...}` and `{@render ...}` instead of `<slot>` and `$$slots` and `<svelte:fragment>`
+- use `<DynamicComponent>` instead of `<svelte:component this={DynamicComponent}>`
+- use `import Self from './ThisComponent.svelte'` and `<Self>` instead of `<svelte:self>`
+- use classes with `$state` fields to share reactivity between components, instead of using stores
+- use `{@attach ...}` instead of `use:action`
+- use clsx-style arrays and objects in `class` attributes, instead of the `class:` directive

tools/skills/svelte-core-bestpractices/references/$inspect.md

@@ -0,0 +1,53 @@
+> [!NOTE] `$inspect` only works during development. In a production build it becomes a noop.
+
+The `$inspect` rune is roughly equivalent to `console.log`, with the exception that it will re-run whenever its argument changes. `$inspect` tracks reactive state deeply, meaning that updating something inside an object or array using fine-grained reactivity will cause it to re-fire (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+	let message = $state('hello');
+
+	$inspect(count, message); // will console.log when `count` or `message` change
+</script>
+
+<button onclick={() => count++}>Increment</button>
+<input bind:value={message} />
+```
+
+On updates, a stack trace will be printed, making it easy to find the origin of a state change (unless you're in the playground, due to technical limitations).
+
+## $inspect(...).with
+
+`$inspect` returns a property `with`, which you can invoke with a callback, which will then be invoked instead of `console.log`. The first argument to the callback is either `"init"` or `"update"`; subsequent arguments are the values passed to `$inspect` (demo:
+
+```svelte
+<script>
+	let count = $state(0);
+
+	$inspect(count).with((type, count) => {
+		if (type === 'update') {
+			debugger; // or `console.trace`, or whatever you want
+		}
+	});
+</script>
+
+<button onclick={() => count++}>Increment</button>
+```
+
+## $inspect.trace(...)
+
+This rune, added in 5.14, causes the surrounding function to be _traced_ in development. Any time the function re-runs as part of an [effect]($effect) or a [derived]($derived), information will be printed to the console about which pieces of reactive state caused the effect to fire.
+
+```svelte
+<script>
+	import { doSomeWork } from './elsewhere';
+
+	$effect(() => {
+		+++// $inspect.trace must be the first statement of a function body+++
+		+++$inspect.trace();+++
+		doSomeWork();
+	});
+</script>
+```
+
+`$inspect.trace` takes an optional first argument which will be used as the label.

tools/skills/svelte-core-bestpractices/references/@attach.md

@@ -0,0 +1,166 @@
+Attachments are functions that run in an [effect]($effect) when an element is mounted to the DOM or when [state]($state) read inside the function updates.
+
+Optionally, they can return a function that is called before the attachment re-runs, or after the element is later removed from the DOM.
+
+> [!NOTE]
+> Attachments are available in Svelte 5.29 and newer.
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	/** @type {import('svelte/attachments').Attachment} */
+	function myAttachment(element) {
+		console.log(element.nodeName); // 'DIV'
+
+		return () => {
+			console.log('cleaning up');
+		};
+	}
+</script>
+
+<div {@attach myAttachment}>...</div>
+```
+
+An element can have any number of attachments.
+
+## Attachment factories
+
+A useful pattern is for a function, such as `tooltip` in this example, to _return_ an attachment (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<button {@attach tooltip(content)}> Hover me </button>
+```
+
+Since the `tooltip(content)` expression runs inside an [effect]($effect), the attachment will be destroyed and recreated whenever `content` changes. The same thing would happen for any state read _inside_ the attachment function when it first runs. (If this isn't what you want, see [Controlling when attachments re-run](#Controlling-when-attachments-re-run).)
+
+## Inline attachments
+
+Attachments can also be created inline (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<canvas
+	width={32}
+	height={32}
+	{@attach (canvas) => {
+		const context = canvas.getContext('2d');
+
+		$effect(() => {
+			context.fillStyle = color;
+			context.fillRect(0, 0, canvas.width, canvas.height);
+		});
+	}}
+></canvas>
+```
+
+> [!NOTE]
+> The nested effect runs whenever `color` changes, while the outer effect (where `canvas.getContext(...)` is called) only runs once, since it doesn't read any reactive state.
+
+## Conditional attachments
+
+Falsy values like `false` or `undefined` are treated as no attachment, enabling conditional usage:
+
+```svelte
+<div {@attach enabled && myAttachment}>...</div>
+```
+
+## Passing attachments to components
+
+When used on a component, `{@attach ...}` will create a prop whose key is a [`Symbol`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol). If the component then [spreads](/tutorial/svelte/spread-props) props onto an element, the element will receive those attachments.
+
+This allows you to create _wrapper components_ that augment elements (demo:
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	/** @type {import('svelte/elements').HTMLButtonAttributes} */
+	let { children, ...props } = $props();
+</script>
+
+<!-- `props` includes attachments -->
+<button {...props}>
+	{@render children?.()}
+</button>
+```
+
+```svelte
+<!--- file: App.svelte --->
+<script>
+	import tippy from 'tippy.js';
+	import Button from './Button.svelte';
+
+	let content = $state('Hello!');
+
+	/**
+	 * @param {string} content
+	 * @returns {import('svelte/attachments').Attachment}
+	 */
+	function tooltip(content) {
+		return (element) => {
+			const tooltip = tippy(element, { content });
+			return tooltip.destroy;
+		};
+	}
+</script>
+
+<input bind:value={content} />
+
+<Button {@attach tooltip(content)}>Hover me</Button>
+```
+
+## Controlling when attachments re-run
+
+Attachments, unlike [actions](use), are fully reactive: `{@attach foo(bar)}` will re-run on changes to `foo` _or_ `bar` (or any state read inside `foo`):
+
+```js
+// @errors: 7006 2304 2552
+function foo(bar) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+		update(node, bar);
+	};
+}
+```
+
+In the rare case that this is a problem (for example, if `foo` does expensive and unavoidable setup work) consider passing the data inside a function and reading it in a child effect:
+
+```js
+// @errors: 7006 2304 2552
+function foo(+++getBar+++) {
+	return (node) => {
+		veryExpensiveSetupWork(node);
+
++++		$effect(() => {
+			update(node, getBar());
+		});+++
+	}
+}
+```
+
+## Creating attachments programmatically
+
+To add attachments to an object that will be spread onto a component or element, use [`createAttachmentKey`](svelte-attachments#createAttachmentKey).
+
+## Converting actions to attachments
+
+If you're using a library that only provides actions, you can convert them to attachments with [`fromAction`](svelte-attachments#fromAction), allowing you to (for example) use them with components.

tools/skills/svelte-core-bestpractices/references/@render.md

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+To render a [snippet](snippet), use a `{@render ...}` tag.
+
+```svelte
+{#snippet sum(a, b)}
+	<p>{a} + {b} = {a + b}</p>
+{/snippet}
+
+{@render sum(1, 2)}
+{@render sum(3, 4)}
+{@render sum(5, 6)}
+```
+
+The expression can be an identifier like `sum`, or an arbitrary JavaScript expression:
+
+```svelte
+{@render (cool ? coolSnippet : lameSnippet)()}
+```
+
+## Optional snippets
+
+If the snippet is potentially undefined — for example, because it's an incoming prop — then you can use optional chaining to only render it when it _is_ defined:
+
+```svelte
+{@render children?.()}
+```
+
+Alternatively, use an [`{#if ...}`](if) block with an `:else` clause to render fallback content:
+
+```svelte
+{#if children}
+	{@render children()}
+{:else}
+	<p>fallback content</p>
+{/if}
+```

tools/skills/svelte-core-bestpractices/references/await-expressions.md

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+As of Svelte 5.36, you can use the `await` keyword inside your components in three places where it was previously unavailable:
+
+- at the top level of your component's `<script>`
+- inside `$derived(...)` declarations
+- inside your markup
+
+This feature is currently experimental, and you must opt in by adding the `experimental.async` option wherever you [configure](/docs/kit/configuration) Svelte, usually `svelte.config.js`:
+
+```js
+/// file: svelte.config.js
+export default {
+	compilerOptions: {
+		experimental: {
+			async: true,
+		},
+	},
+};
+```
+
+The experimental flag will be removed in Svelte 6.
+
+## Synchronized updates
+
+When an `await` expression depends on a particular piece of state, changes to that state will not be reflected in the UI until the asynchronous work has completed, so that the UI is not left in an inconsistent state. In other words, in an example like this...
+
+```svelte
+<script>
+	let a = $state(1);
+	let b = $state(2);
+
+	async function add(a, b) {
+		await new Promise((f) => setTimeout(f, 500)); // artificial delay
+		return a + b;
+	}
+</script>
+
+<input type="number" bind:value={a} />
+<input type="number" bind:value={b} />
+
+<p>{a} + {b} = {await add(a, b)}</p>
+```
+
+...if you increment `a`, the contents of the `<p>` will _not_ immediately update to read this —
+
+```html
+<p>2 + 2 = 3</p>
+```
+
+— instead, the text will update to `2 + 2 = 4` when `add(a, b)` resolves.
+
+Updates can overlap — a fast update will be reflected in the UI while an earlier slow update is still ongoing.
+
+## Concurrency
+
+Svelte will do as much asynchronous work as it can in parallel. For example if you have two `await` expressions in your markup...
+
+```svelte
+<p>{await one()}</p><p>{await two()}</p>
+```
+
+...both functions will run at the same time, as they are independent expressions, even though they are _visually_ sequential.
+
+This does not apply to sequential `await` expressions inside your `<script>` or inside async functions — these run like any other asynchronous JavaScript. An exception is that independent `$derived` expressions will update independently, even though they will run sequentially when they are first created:
+
+```js
+// these will run sequentially the first time,
+// but will update independently
+let a = $derived(await one());
+let b = $derived(await two());
+```
+
+> [!NOTE] If you write code like this, expect Svelte to give you an [`await_waterfall`](runtime-warnings#Client-warnings-await_waterfall) warning
+
+## Indicating loading states
+
+To render placeholder UI, you can wrap content in a `<svelte:boundary>` with a [`pending`](svelte-boundary#Properties-pending) snippet. This will be shown when the boundary is first created, but not for subsequent updates, which are globally coordinated.
+
+After the contents of a boundary have resolved for the first time and have replaced the `pending` snippet, you can detect subsequent async work with [`$effect.pending()`]($effect#$effect.pending). This is what you would use to display a "we're asynchronously validating your input" spinner next to a form field, for example.
+
+You can also use [`settled()`](svelte#settled) to get a promise that resolves when the current update is complete:
+
+```js
+import { tick, settled } from 'svelte';
+
+async function onclick() {
+	updating = true;
+
+	// without this, the change to `updating` will be
+	// grouped with the other changes, meaning it
+	// won't be reflected in the UI
+	await tick();
+
+	color = 'octarine';
+	answer = 42;
+
+	await settled();
+
+	// any updates affected by `color` or `answer`
+	// have now been applied
+	updating = false;
+}
+```
+
+## Error handling
+
+Errors in `await` expressions will bubble to the nearest [error boundary](svelte-boundary).
+
+## Server-side rendering
+
+Svelte supports asynchronous server-side rendering (SSR) with the `render(...)` API. To use it, simply await the return value:
+
+```js
+/// file: server.js
+import { render } from 'svelte/server';
+import App from './App.svelte';
+
+const { head, body } = +++await+++ render(App);
+```
+
+> [!NOTE] If you're using a framework like SvelteKit, this is done on your behalf.
+
+If a `<svelte:boundary>` with a `pending` snippet is encountered during SSR, that snippet will be rendered while the rest of the content is ignored. All `await` expressions encountered outside boundaries with `pending` snippets will resolve and render their contents prior to `await render(...)` returning.
+
+> [!NOTE] In the future, we plan to add a streaming implementation that renders the content in the background.
+
+## Forking
+
+The [`fork(...)`](svelte#fork) API, added in 5.42, makes it possible to run `await` expressions that you _expect_ to happen in the near future. This is mainly intended for frameworks like SvelteKit to implement preloading when (for example) users signal an intent to navigate.
+
+```svelte
+<script>
+	import { fork } from 'svelte';
+	import Menu from './Menu.svelte';
+
+	let open = $state(false);
+
+	/** @type {import('svelte').Fork | null} */
+	let pending = null;
+
+	function preload() {
+		pending ??= fork(() => {
+			open = true;
+		});
+	}
+
+	function discard() {
+		pending?.discard();
+		pending = null;
+	}
+</script>
+
+<button
+	onfocusin={preload}
+	onfocusout={discard}
+	onpointerenter={preload}
+	onpointerleave={discard}
+	onclick={() => {
+		pending?.commit();
+		pending = null;
+
+		// in case `pending` didn't exist
+		// (if it did, this is a no-op)
+		open = true;
+	}}>open menu</button
+>
+
+{#if open}
+	<!-- any async work inside this component will start
+	     as soon as the fork is created -->
+	<Menu onclose={() => (open = false)} />
+{/if}
+```
+
+## Caveats
+
+As an experimental feature, the details of how `await` is handled (and related APIs like `$effect.pending()`) are subject to breaking changes outside of a semver major release, though we intend to keep such changes to a bare minimum.
+
+## Breaking changes
+
+Effects run in a slightly different order when the `experimental.async` option is `true`. Specifically, _block_ effects like `{#if ...}` and `{#each ...}` now run before an `$effect.pre` or `beforeUpdate` in the same component, which means that in very rare situations.

tools/skills/svelte-core-bestpractices/references/bind.md

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+## Function bindings
+
+You can also use `bind:property={get, set}`, where `get` and `set` are functions, allowing you to perform validation and transformation:
+
+```svelte
+<input bind:value={() => value, (v) => (value = v.toLowerCase())} />
+```
+
+In the case of readonly bindings like [dimension bindings](#Dimensions), the `get` value should be `null`:
+
+```svelte
+<div bind:clientWidth={null, redraw} bind:clientHeight={null, redraw}>...</div>
+```
+
+> [!NOTE]
+> Function bindings are available in Svelte 5.9.0 and newer.

tools/skills/svelte-core-bestpractices/references/each.md

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+## Keyed each blocks
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name (key)}...{/each}
+```
+
+```svelte
+<!--- copy: false  --->
+{#each expression as name, index (key)}...{/each}
+```
+
+If a _key_ expression is provided — which must uniquely identify each list item — Svelte will use it to intelligently update the list when data changes by inserting, moving and deleting items, rather than adding or removing items at the end and updating the state in the middle.
+
+The key can be any object, but strings and numbers are recommended since they allow identity to persist when the objects themselves change.
+
+```svelte
+{#each items as item (item.id)}
+	<li>{item.name} x {item.qty}</li>
+{/each}
+
+<!-- or with additional index value -->
+{#each items as item, i (item.id)}
+	<li>{i + 1}: {item.name} x {item.qty}</li>
+{/each}
+```
+
+You can freely use destructuring and rest patterns in each blocks.
+
+```svelte
+{#each items as { id, name, qty }, i (id)}
+	<li>{i + 1}: {name} x {qty}</li>
+{/each}
+
+{#each objects as { id, ...rest }}
+	<li><span>{id}</span><MyComponent {...rest} /></li>
+{/each}
+
+{#each items as [id, ...rest]}
+	<li><span>{id}</span><MyComponent values={rest} /></li>
+{/each}
+```

tools/skills/svelte-core-bestpractices/references/hydratable.md

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+In Svelte, when you want to render asynchronous content data on the server, you can simply `await` it. This is great! However, it comes with a pitfall: when hydrating that content on the client, Svelte has to redo the asynchronous work, which blocks hydration for however long it takes:
+
+```svelte
+<script>
+	import { getUser } from 'my-database-library';
+
+	// This will get the user on the server, render the user's name into the h1,
+	// and then, during hydration on the client, it will get the user _again_,
+	// blocking hydration until it's done.
+	const user = await getUser();
+</script>
+
+<h1>{user.name}</h1>
+```
+
+That's silly, though. If we've already done the hard work of getting the data on the server, we don't want to get it again during hydration on the client. `hydratable` is a low-level API built to solve this problem. You probably won't need this very often — it will be used behind the scenes by whatever datafetching library you use. For example, it powers [remote functions in SvelteKit](/docs/kit/remote-functions).
+
+To fix the example above:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	import { getUser } from 'my-database-library';
+
+	// During server rendering, this will serialize and stash the result of `getUser`, associating
+	// it with the provided key and baking it into the `head` content. During hydration, it will
+	// look for the serialized version, returning it instead of running `getUser`. After hydration
+	// is done, if it's called again, it'll simply invoke `getUser`.
+	const user = await hydratable('user', () => getUser());
+</script>
+
+<h1>{user.name}</h1>
+```
+
+This API can also be used to provide access to random or time-based values that are stable between server rendering and hydration. For example, to get a random number that doesn't update on hydration:
+
+```ts
+import { hydratable } from 'svelte';
+const rand = hydratable('random', () => Math.random());
+```
+
+If you're a library author, be sure to prefix the keys of your `hydratable` values with the name of your library so that your keys don't conflict with other libraries.
+
+## Serialization
+
+All data returned from a `hydratable` function must be serializable. But this doesn't mean you're limited to JSON — Svelte uses [`devalue`](https://npmjs.com/package/devalue), which can serialize all sorts of things including `Map`, `Set`, `URL`, and `BigInt`. Check the documentation page for a full list. In addition to these, thanks to some Svelte magic, you can also fearlessly use promises:
+
+```svelte
+<script>
+	import { hydratable } from 'svelte';
+	const promises = hydratable('random', () => {
+		return {
+			one: Promise.resolve(1),
+			two: Promise.resolve(2),
+		};
+	});
+</script>
+
+{await promises.one}
+{await promises.two}
+```
+
+## CSP
+
+`hydratable` adds an inline `<script>` block to the `head` returned from `render`. If you're using [Content Security Policy](https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CSP) (CSP), this script will likely fail to run. You can provide a `nonce` to `render`:
+
+```js
+const nonce = crypto.randomUUID();
+
+const { head, body } = await render(App, {
+	csp: { nonce },
+});
+```
+
+This will add the `nonce` to the script block, on the assumption that you will later add the same nonce to the CSP header of the document that contains it:
+
+```js
+response.headers.set('Content-Security-Policy', `script-src 'nonce-${nonce}'`);
+```
+
+It's essential that a `nonce` — which, British slang definition aside, means 'number used once' — is only used when dynamically server rendering an individual response.
+
+If instead you are generating static HTML ahead of time, you must use hashes instead:
+
+```js
+const { head, body, hashes } = await render(App, {
+	csp: { hash: true },
+});
+```
+
+`hashes.script` will be an array of strings like `["sha256-abcd123"]`. As with `nonce`, the hashes should be used in your CSP header:
+
+```js
+response.headers.set(
+	'Content-Security-Policy',
+	`script-src ${hashes.script.map((hash) => `'${hash}'`).join(' ')}`,
+);
+```
+
+We recommend using `nonce` over hash if you can, as `hash` will interfere with streaming SSR in the future.

tools/skills/svelte-core-bestpractices/references/snippet.md

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+```svelte
+<!--- copy: false  --->
+{#snippet name()}...{/snippet}
+```
+
+```svelte
+<!--- copy: false  --->
+{#snippet name(param1, param2, paramN)}...{/snippet}
+```
+
+Snippets, and [render tags](@render), are a way to create reusable chunks of markup inside your components. Instead of writing duplicative code like this...
+
+```svelte
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			<figure>
+				<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+				<figcaption>{image.caption}</figcaption>
+			</figure>
+		</a>
+	{:else}
+		<figure>
+			<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+			<figcaption>{image.caption}</figcaption>
+		</figure>
+	{/if}
+{/each}
+```
+
+...you can write this:
+
+```svelte
+{#snippet figure(image)}
+	<figure>
+		<img src={image.src} alt={image.caption} width={image.width} height={image.height} />
+		<figcaption>{image.caption}</figcaption>
+	</figure>
+{/snippet}
+
+{#each images as image}
+	{#if image.href}
+		<a href={image.href}>
+			{@render figure(image)}
+		</a>
+	{:else}
+		{@render figure(image)}
+	{/if}
+{/each}
+```
+
+Like function declarations, snippets can have an arbitrary number of parameters, which can have default values, and you can destructure each parameter. You cannot use rest parameters, however.
+
+## Snippet scope
+
+Snippets can be declared anywhere inside your component. They can reference values declared outside themselves, for example in the `<script>` tag or in `{#each ...}` blocks (demo...
+
+```svelte
+<script>
+	let { message = `it's great to see you!` } = $props();
+</script>
+
+{#snippet hello(name)}
+	<p>hello {name}! {message}!</p>
+{/snippet}
+
+{@render hello('alice')}
+{@render hello('bob')}
+```
+
+...and they are 'visible' to everything in the same lexical scope (i.e. siblings, and children of those siblings):
+
+```svelte
+<div>
+	{#snippet x()}
+		{#snippet y()}...{/snippet}
+
+		<!-- this is fine -->
+		{@render y()}
+	{/snippet}
+
+	<!-- this will error, as `y` is not in scope -->
+	{@render y()}
+</div>
+
+<!-- this will also error, as `x` is not in scope -->
+{@render x()}
+```
+
+Snippets can reference themselves and each other (demo:
+
+```svelte
+{#snippet blastoff()}
+	<span>🚀</span>
+{/snippet}
+
+{#snippet countdown(n)}
+	{#if n > 0}
+		<span>{n}...</span>
+		{@render countdown(n - 1)}
+	{:else}
+		{@render blastoff()}
+	{/if}
+{/snippet}
+
+{@render countdown(10)}
+```
+
+## Passing snippets to components
+
+### Explicit props
+
+Within the template, snippets are values just like any other. As such, they can be passed to components as props (demo:
+
+```svelte
+<script>
+	import Table from './Table.svelte';
+
+	const fruits = [
+		{ name: 'apples', qty: 5, price: 2 },
+		{ name: 'bananas', qty: 10, price: 1 },
+		{ name: 'cherries', qty: 20, price: 0.5 },
+	];
+</script>
+
+{#snippet header()}
+	<th>fruit</th>
+	<th>qty</th>
+	<th>price</th>
+	<th>total</th>
+{/snippet}
+
+{#snippet row(d)}
+	<td>{d.name}</td>
+	<td>{d.qty}</td>
+	<td>{d.price}</td>
+	<td>{d.qty * d.price}</td>
+{/snippet}
+
+<Table data={fruits} {header} {row} />
+```
+
+Think about it like passing content instead of data to a component. The concept is similar to slots in web components.
+
+### Implicit props
+
+As an authoring convenience, snippets declared directly _inside_ a component implicitly become props _on_ the component (demo:
+
+```svelte
+<!-- this is semantically the same as the above -->
+<Table data={fruits}>
+	{#snippet header()}
+		<th>fruit</th>
+		<th>qty</th>
+		<th>price</th>
+		<th>total</th>
+	{/snippet}
+
+	{#snippet row(d)}
+		<td>{d.name}</td>
+		<td>{d.qty}</td>
+		<td>{d.price}</td>
+		<td>{d.qty * d.price}</td>
+	{/snippet}
+</Table>
+```
+
+### Implicit `children` snippet
+
+Any content inside the component tags that is _not_ a snippet declaration implicitly becomes part of the `children` snippet (demo:
+
+```svelte
+<!--- file: App.svelte --->
+<Button>click me</Button>
+```
+
+```svelte
+<!--- file: Button.svelte --->
+<script>
+	let { children } = $props();
+</script>
+
+<!-- result will be <button>click me</button> -->
+<button>{@render children()}</button>
+```
+
+> [!NOTE] Note that you cannot have a prop called `children` if you also have content inside the component — for this reason, you should avoid having props with that name
+
+### Optional snippet props
+
+You can declare snippet props as being optional. You can either use optional chaining to not render anything if the snippet isn't set...
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{@render children?.()}
+```
+
+...or use an `#if` block to render fallback content:
+
+```svelte
+<script>
+	let { children } = $props();
+</script>
+
+{#if children}
+	{@render children()}
+{:else}
+	fallback content
+{/if}
+```
+
+## Typing snippets
+
+Snippets implement the `Snippet` interface imported from `'svelte'`:
+
+```svelte
+<script lang="ts">
+	import type { Snippet } from 'svelte';
+
+	interface Props {
+		data: any[];
+		children: Snippet;
+		row: Snippet<[any]>;
+	}
+
+	let { data, children, row }: Props = $props();
+</script>
+```
+
+With this change, red squigglies will appear if you try and use the component without providing a `data` prop and a `row` snippet. Notice that the type argument provided to `Snippet` is a tuple, since snippets can have multiple parameters.
+
+We can tighten things up further by declaring a generic, so that `data` and `row` refer to the same type:
+
+```svelte
+<script lang="ts" generics="T">
+	import type { Snippet } from 'svelte';
+
+	let {
+		data,
+		children,
+		row,
+	}: {
+		data: T[];
+		children: Snippet;
+		row: Snippet<[T]>;
+	} = $props();
+</script>
+```
+
+## Exporting snippets
+
+Snippets declared at the top level of a `.svelte` file can be exported from a `<script module>` for use in other components, provided they don't reference any declarations in a non-module `<script>` (whether directly or indirectly, via other snippets) (demo:
+
+```svelte
+<script module>
+	export { add };
+</script>
+
+{#snippet add(a, b)}
+	{a} + {b} = {a + b}
+{/snippet}
+```
+
+> [!NOTE]
+> This requires Svelte 5.5.0 or newer
+
+## Programmatic snippets
+
+Snippets can be created programmatically with the [`createRawSnippet`](svelte#createRawSnippet) API. This is intended for advanced use cases.
+
+## Snippets and slots
+
+In Svelte 4, content can be passed to components using [slots](legacy-slots). Snippets are more powerful and flexible, and so slots have been deprecated in Svelte 5.

tools/skills/svelte-core-bestpractices/references/svelte-reactivity.md

@@ -0,0 +1,61 @@
+## createSubscriber
+
+<blockquote class="since note">
+
+Available since 5.7.0
+
+</blockquote>
+
+Returns a `subscribe` function that integrates external event-based systems with Svelte's reactivity.
+It's particularly useful for integrating with web APIs like `MediaQuery`, `IntersectionObserver`, or `WebSocket`.
+
+If `subscribe` is called inside an effect (including indirectly, for example inside a getter),
+the `start` callback will be called with an `update` function. Whenever `update` is called, the effect re-runs.
+
+If `start` returns a cleanup function, it will be called when the effect is destroyed.
+
+If `subscribe` is called in multiple effects, `start` will only be called once as long as the effects
+are active, and the returned teardown function will only be called when all effects are destroyed.
+
+It's best understood with an example. Here's an implementation of [`MediaQuery`](/docs/svelte/svelte-reactivity#MediaQuery):
+
+```js
+// @errors: 7031
+import { createSubscriber } from 'svelte/reactivity';
+import { on } from 'svelte/events';
+
+export class MediaQuery {
+	#query;
+	#subscribe;
+
+	constructor(query) {
+		this.#query = window.matchMedia(`(${query})`);
+
+		this.#subscribe = createSubscriber((update) => {
+			// when the `change` event occurs, re-run any effects that read `this.current`
+			const off = on(this.#query, 'change', update);
+
+			// stop listening when all the effects are destroyed
+			return () => off();
+		});
+	}
+
+	get current() {
+		// This makes the getter reactive, if read in an effect
+		this.#subscribe();
+
+		// Return the current state of the query, whether or not we're in an effect
+		return this.#query.matches;
+	}
+}
+```
+
+<div class="ts-block">
+
+```dts
+function createSubscriber(
+	start: (update: () => void) => (() => void) | void
+): () => void;
+```
+
+</div>