Version Packages (#141)

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

.changeset/config.json

@@ -7,5 +7,5 @@
 	"access": "public",
 	"baseBranch": "main",
 	"updateInternalDependencies": "patch",
-	"ignore": ["!@sveltejs/mcp"]
+	"ignore": ["!@sveltejs/mcp", "!@sveltejs/opencode"]
 }

.claude-plugin/marketplace.json

@@ -7,7 +7,16 @@
 		{
 			"name": "svelte",
 			"source": "./plugins/svelte",
-			"description": "A plugin for all things Svelte development, MCP, skills, and more."
+			"description": "A plugin for all things Svelte development, MCP, skills, and more.",
+			"lspServers": {
+				"svelte": {
+					"command": "svelte-language-server",
+					"args": ["--stdio"],
+					"extensionToLanguage": {
+						".svelte": "svelte"
+					}
+				}
+			}
 		}
 	]
 }

.github/workflows/check.yml

@@ -18,10 +18,10 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10.26.2
+          version: 10.27.0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
           node-version: '24'
           cache: 'pnpm'

.github/workflows/lint.yml

@@ -18,10 +18,10 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10.26.2
+          version: 10.27.0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
           node-version: '24'
           cache: 'pnpm'

.github/workflows/publish-any-commit.yml

@@ -12,7 +12,7 @@ jobs:
         uses: actions/checkout@v6
 
       - run: corepack enable
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
           node-version: 24
           cache: 'pnpm'
@@ -20,4 +20,4 @@ jobs:
       - name: Install dependencies
         run: pnpm install
 
-      - run: pnpm dlx pkg-pr-new publish --compact './packages/mcp-stdio' --pnpm
+      - run: pnpm dlx pkg-pr-new publish --compact './packages/mcp-stdio' './packages/opencode' --pnpm

.github/workflows/release.yml

@@ -29,7 +29,7 @@ jobs:
         with:
           # This makes Actions fetch all Git history so that Changesets can generate changelogs with the correct commits
           fetch-depth: 0
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
           node-version: ${{ matrix.node }}
           package-manager-cache: false # pnpm is not installed yet
@@ -39,10 +39,11 @@ jobs:
           PNPM_VER=$(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
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
           node-version: ${{ matrix.node }}
           package-manager-cache: true # caches pnpm via packageManager field in package.json
+          cache: 'pnpm'
       - name: install
         run: pnpm install --frozen-lockfile --prefer-offline --ignore-scripts
       - name: build

.github/workflows/test.yml

@@ -18,10 +18,10 @@ jobs:
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10.26.2
+          version: 10.27.0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
           node-version: '24'
           cache: 'pnpm'

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

@@ -0,0 +1,78 @@
+name: Update OpenCode JSON Schema
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'packages/opencode/config.ts'
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  update-docs:
+    # prevents this action from running on forks
+    if: github.repository == 'sveltejs/mcp'
+    name: Update OpenCode JSON Schema
+    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: Generate opencode JSON schema
+        run: pnpm generate-opencode-jsonschema
+
+      - name: Check for changes
+        id: git-check
+        run: |
+          git diff --exit-code packages/opencode/schema.json || echo "changed=true" >> $GITHUB_OUTPUT
+
+      - name: Create Pull Request
+        if: steps.git-check.outputs.changed == 'true'
+        uses: peter-evans/create-pull-request@98357b18bf14b5342f975ff684046ec3b2a07725 # v8.0.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: 'docs: update opencode JSON schema'
+          branch: docs/update-opencode-jsonschema
+          delete-branch: true
+          title: 'docs: update opencode JSON schema'
+          body: |
+            ## Summary
+            Automatically generated update for OpenCode JSON schema.
+
+            This PR was triggered by changes to the OpenCode configuration file `packages/opencode/config.ts`.
+
+            ## Changes
+            - Updated `packages/opencode/schema.json` with latest JSON schema
+
+            ## Generated by
+            GitHub Action: Update OpenCode JSON Schema
+          labels: |
+            automated

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

@@ -24,7 +24,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
         with:
           node-version: 24
           package-manager-cache: false # pnpm is not installed yet
@@ -37,10 +37,11 @@ jobs:
           npm i -g pnpm@$PNPM_VER
 
       - name: Setup Node.js with pnpm cache
-        uses: actions/setup-node@v6
+        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
@@ -55,7 +56,7 @@ jobs:
 
       - name: Create Pull Request
         if: steps.git-check.outputs.changed == 'true'
-        uses: peter-evans/create-pull-request@v8
+        uses: peter-evans/create-pull-request@98357b18bf14b5342f975ff684046ec3b2a07725 # v8.0.0
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           commit-message: 'docs: update prompts documentation'

.prettierignore

@@ -12,4 +12,6 @@ bun.lockb
 
 # Claude Code
 .claude/
-.changeset/
+.changeset/
+
+/packages/opencode/schema.json

documentation/docs/20-setup/20-local-setup.md

@@ -57,7 +57,7 @@ The `[scope]` must be `user`, `project` or `local`.
 
 ## OpenCode
 
-Run the command:
+You can automatically configure the MCP server using the [OpenCode plugin](opencode-plugin) (recommended). If you prefer to configure the MCP server manually, run:
 
 ```bash
 opencode mcp add

documentation/docs/20-setup/30-remote-setup.md

@@ -48,7 +48,7 @@ The `[scope]` must be `user` or `project`.
 
 ## OpenCode
 
-Run the command:
+You can automatically configure the MCP server using the [OpenCode plugin](opencode-plugin) (recommended). If you prefer to configure the MCP server manually, run:
 
 ```bash
 opencode mcp add

documentation/docs/40-opencode-plugin/index.md

@@ -0,0 +1,3 @@
+---
+title: OpenCode Plugin
+---

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

@@ -0,0 +1,39 @@
+---
+title: Overview
+---
+
+OpenCode has a [plugin system](https://opencode.ai/docs/plugins/) that allows developers to add MCP servers, agents and commands programmatically. Svelte has an OpenCode plugin published under `@sveltejs/opencode`.
+
+## 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.
+
+```json
+{
+	"$schema": "https://opencode.ai/config.json",
+	"plugin": ["@sveltejs/opencode"]
+}
+```
+
+That's it! You now have the Svelte MCP server and the [file editor subagent](opencode-subagent) configured for you.
+
+## Configuration
+
+The default configuration for the Svelte OpenCode plugin looks like this...
+
+```json
+{
+	"$schema": "https://raw.githubusercontent.com/sveltejs/mcp/refs/heads/main/packages/opencode/schema.json",
+	"mcp": {
+		"type": "remote",
+		"enabled": true
+	},
+	"subagent": {
+		"enabled": true
+	}
+}
+```
+
+...but if you prefer, you can enable only the subagent, only the MCP, or configure the kind of MCP server you want to use (`local` or `remote`).
+
+You can place this file in `~/.config/opencode/svelte.json` or, if you have an `OPENCODE_CONFIG_DIR` environment variable specified, at `$OPENCODE_CONFIG_DIR/svelte.json`.

documentation/docs/40-opencode-plugin/opencode-subagent.md

@@ -0,0 +1,11 @@
+---
+title: Subagent
+---
+
+The Svelte plugin includes a specialized subagent called `svelte-file-editor` designed for creating, editing, and reviewing Svelte files.
+
+## Benefits
+
+The subagent has access to its own context window, allowing it to fetch the documentation, iterate with the `svelte-autofixer` tool and write to the file system without wasting context in the main agent.
+
+The delegation should happen automatically when appropriate, but you can also explicitly request the subagent be used for Svelte-related tasks.

package.json

@@ -3,7 +3,7 @@
 	"version": "0.0.1",
 	"description": "The official Svelte MCP server implementation",
 	"type": "module",
-	"packageManager": "pnpm@10.26.2",
+	"packageManager": "pnpm@10.27.0",
 	"scripts": {
 		"build": "pnpm -r run build",
 		"dev": "pnpm --filter @sveltejs/mcp-remote run dev",
@@ -18,6 +18,7 @@
 		"test": "npm run test:unit -- --run",
 		"test:watch": "npm run test:unit -- --watch",
 		"inspect": "pnpm mcp-inspector",
+		"generate-opencode-jsonschema": "pnpm --filter @sveltejs/opencode run generate-schema",
 		"generate-summaries": "pnpm --filter @sveltejs/mcp-server run generate-summaries",
 		"generate-prompt-docs": "node --import node-resolve-ts/register scripts/update-docs-prompts.ts",
 		"debug:generate-summaries": "pnpm --filter @sveltejs/mcp-server run debug:generate-summaries",

packages/mcp-server/src/mcp/handlers/tools/playground-link.test.ts

@@ -67,6 +67,24 @@ describe('playground-link tool', () => {
 		);
 	});
 
+	it('should have tool _meta with resource URI for MCP Apps hosts', async () => {
+		const tools = await session.listTools();
+		const playground_tool = tools.tools.find((t) => t.name === 'playground-link');
+		expect(playground_tool).toBeDefined();
+		expect(playground_tool?._meta).toStrictEqual({
+			ui: { resourceUri: 'ui://svelte/playground-link' },
+		});
+	});
+
+	it('should expose a resource for MCP Apps hosts', async () => {
+		const resources = await session.listResources();
+		const playground_resource = resources.resources.find(
+			(r) => r.uri === 'ui://svelte/playground-link',
+		);
+		expect(playground_resource).toBeDefined();
+		expect(playground_resource?.name).toBe('playground-link-ui');
+	});
+
 	it('should not create a playground link if App.svelte is missing', async () => {
 		const result = await session.callTool<{ url: string }>('playground-link', {
 			name: 'My Playground',

packages/mcp-server/src/mcp/handlers/tools/playground-link.ts

@@ -1,8 +1,8 @@
-import type { SvelteMcp } from '../../index.js';
-import * as v from 'valibot';
-import { icons } from '../../icons/index.js';
 import { createUIResource } from '@mcp-ui/server';
 import { tool } from 'tmcp/utils';
+import * as v from 'valibot';
+import { icons } from '../../icons/index.js';
+import type { SvelteMcp } from '../../index.js';
 
 async function compress_and_encode_text(input: string) {
 	const reader = new Blob([input]).stream().pipeThrough(new CompressionStream('gzip')).getReader();
@@ -97,7 +97,106 @@ export async function playground_link_handler({
 	};
 }
 
+// Create the UI resource for MCP Apps hosts (with adapter)
+// This will be registered as a resource that MCP Apps hosts can fetch
+const playground_ui_resource = createUIResource({
+	uri: 'ui://svelte/playground-link',
+	encoding: 'text',
+	resourceProps: {
+		_meta: {
+			ui: {
+				csp: {
+					connectDomains: ['https://svelte.dev'],
+					resourceDomains: ['https://svelte.dev'],
+					frameDomains: ['https://svelte.dev'],
+					baseUriDomains: ['https://svelte.dev'],
+				},
+			},
+		},
+	},
+	content: {
+		type: 'rawHtml',
+		// This is a placeholder HTML - the actual iframe URL will be set per-request
+		// MCP Apps hosts receive the tool input/output via postMessage
+		htmlString: `<!DOCTYPE html>
+<html>
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1">
+	<style>
+		* { margin: 0; padding: 0; box-sizing: border-box; }
+		html, body { width: 100%; height: 100%; }
+		iframe { width: 100%; height: 100%; border: none; display: none; }
+		.loading { display: flex; align-items: center; justify-content: center; height: 100%; font-family: system-ui, sans-serif; color: #666; }
+	</style>
+</head>
+<body>
+	<div class="loading" id="loading">Loading playground...</div>
+	<iframe id="playground" allow="clipboard-write"></iframe>
+	<script>
+		function size_changed() {
+			const width = document.body.scrollWidth;
+			window.parent.postMessage({
+				jsonrpc: '2.0',
+				method: 'ui/notifications/size-changed',
+				params: {
+					width,
+					height: 800
+					}
+				}, '*');
+		}
+		// Signal that the widget is ready
+		window.parent.postMessage({ type: 'ui-lifecycle-iframe-ready' }, '*');
+		
+		// Listen for render data from the adapter (for MCP Apps hosts)
+		window.addEventListener('message', (event) => {
+			if (event.data.type === 'ui-lifecycle-iframe-render-data') {
+				const renderData = event.data.payload.renderData || {};
+				const toolOutput = renderData.toolOutput;
+				
+				// The tool output contains the iframe URL
+				if (toolOutput && toolOutput.structuredContent && toolOutput.structuredContent.url) {
+					const iframe = document.getElementById('playground');
+					const loading = document.getElementById('loading');
+					// Convert the URL to embed URL
+					const embedUrl = toolOutput.structuredContent.url.replace('/playground#', '/playground/embed#');
+					iframe.src = embedUrl;
+					iframe.style.display = 'block';
+					iframe.addEventListener("load", () => {
+						size_changed();
+					});
+					loading.style.display = 'none';
+				}
+			}
+		});
+	</script>
+</body>
+</html>`,
+	},
+	uiMetadata: {
+		'preferred-frame-size': ['100%', '1200px'],
+	},
+	adapters: {
+		mcpApps: { enabled: true },
+	},
+});
+
 export function playground_link(server: SvelteMcp) {
+	// Register the UI resource so MCP Apps hosts can fetch it
+	server.resource(
+		{
+			name: 'playground-link-ui',
+			description: 'UI resource for the Svelte Playground widget',
+			uri: playground_ui_resource.resource.uri,
+			icons,
+		},
+		() => {
+			return {
+				contents: [playground_ui_resource.resource],
+			};
+		},
+	);
+
 	server.tool(
 		{
 			name: 'playground-link',
@@ -112,6 +211,12 @@ export function playground_link(server: SvelteMcp) {
 				openWorldHint: false,
 			},
 			icons,
+			// For MCP Apps hosts - points to the registered resource
+			_meta: {
+				ui: {
+					resourceUri: playground_ui_resource.resource.uri,
+				},
+			},
 		},
 		async ({ files, name, tailwind }) => {
 			if (server.ctx.sessionId && server.ctx.custom?.track) {
@@ -125,6 +230,7 @@ export function playground_link(server: SvelteMcp) {
 							type: 'text',
 							text: JSON.stringify({ url: result.url }),
 						},
+						// Embedded resource for MCP-UI hosts (no adapter, uses externalUrl)
 						createUIResource({
 							uri: 'ui://svelte/playground-link',
 							content: {

packages/mcp-server/src/mcp/handlers/tools/svelte-autofixer.test.ts

@@ -53,6 +53,18 @@ describe('svelte-autofixer tool', () => {
 		);
 	});
 
+	it('should add suggestions for snippets declared in script tag', async () => {
+		const content = await autofixer_tool_call(`<script>
+			{#snippet my_snippet()}
+				some content
+			{/snippet}
+		</script>`);
+		expect(content.issues.length).toBeGreaterThan(0);
+		expect(content.suggestions).toContain(
+			"The code can't be compiled because a Javascript parse error. The error suggests you have a `{#snippet ...}` block inside the `<script>` tag. Snippets are template syntax and should be declared in the markup section of the component, not in the script. Move the snippet outside of the `<script>` tag. Snippets declared in the markup can also be accessed in the script tag in case you need them.",
+		);
+	});
+
 	it('should error out if async is true with a version less than 5', async () => {
 		const content = await autofixer_tool_call(
 			`<script>

packages/mcp-server/src/mcp/handlers/tools/svelte-autofixer.ts

@@ -75,14 +75,21 @@ export async function svelte_autofixer_handler({
 
 		await add_eslint_issues(content, code, +desired_svelte_version, filename, async);
 	} catch (e: unknown) {
-		const error = e as Error & { start?: { line: number; column: number } };
+		const error = e as Error & { start?: { line: number; column: number }; frame?: string };
 		content.issues.push(
 			`${error.message} at line ${error.start?.line}, column ${error.start?.column}`,
 		);
 		if (error.message.includes('js_parse_error')) {
-			content.suggestions.push(
-				"The code can't be compiled because a Javascript parse error. In case you are using runes like this `$state variable_name = 3;` or `$derived variable_name = 3 * count` that's not how runes are used. You need to use them as function calls without importing them: `const variable_name = $state(3)` and `const variable_name = $derived(3 * count)`.",
-			);
+			// Check if the error frame contains template syntax that was incorrectly placed in the script tag
+			if (error.frame?.includes('{#snippet')) {
+				content.suggestions.push(
+					"The code can't be compiled because a Javascript parse error. The error suggests you have a `{#snippet ...}` block inside the `<script>` tag. Snippets are template syntax and should be declared in the markup section of the component, not in the script. Move the snippet outside of the `<script>` tag. Snippets declared in the markup can also be accessed in the script tag in case you need them.",
+				);
+			} else {
+				content.suggestions.push(
+					"The code can't be compiled because a Javascript parse error. In case you are using runes like this `$state variable_name = 3;` or `$derived variable_name = 3 * count` that's not how runes are used. You need to use them as function calls without importing them: `const variable_name = $state(3)` and `const variable_name = $derived(3 * count)`.",
+				);
+			}
 		} else if (error.message.includes('css_expected_identifier')) {
 			content.suggestions.push(
 				"The code can't be compiled because a valid CSS identifier is expected. This sometimes means you are trying to use a variable in CSS like this: `color: {my_color}` but Svelte doesn't support that. You can use inline CSS variables for that `<div style:--color={my_color}></div>` and then use the variable as usual in CSS with `color: var(--color)`.",

packages/mcp-stdio/CHANGELOG.md

@@ -1,5 +1,17 @@
 # @sveltejs/mcp
 
+## 0.1.18
+
+### Patch Changes
+
+- feat: expose playground link as MCP App ([#138](https://github.com/sveltejs/mcp/pull/138))
+
+## 0.1.17
+
+### Patch Changes
+
+- fix: add suggestion for snippets declared in script tag ([#132](https://github.com/sveltejs/mcp/pull/132))
+
 ## 0.1.16
 
 ### Patch Changes

packages/mcp-stdio/package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@sveltejs/mcp",
-	"version": "0.1.16",
+	"version": "0.1.18",
 	"type": "module",
 	"license": "MIT",
 	"mcpName": "dev.svelte/mcp",

packages/mcp-stdio/server.json

@@ -9,7 +9,7 @@
 		"subfolder": "packages/mcp-stdio",
 		"source": "github"
 	},
-	"version": "0.1.16",
+	"version": "0.1.18",
 	"websiteUrl": "https://svelte.dev/docs/mcp/overview",
 	"icons": [
 		{
@@ -25,7 +25,7 @@
 		{
 			"registryType": "npm",
 			"identifier": "@sveltejs/mcp",
-			"version": "0.1.16",
+			"version": "0.1.18",
 			"runtimeHint": "npx",
 			"transport": {
 				"type": "stdio"

packages/opencode/CHANGELOG.md

@@ -0,0 +1,7 @@
+# @sveltejs/opencode
+
+## 0.0.2
+
+### Patch Changes
+
+- fix: show toast after a few seconds to avoid race condition ([`57e2d1d`](https://github.com/sveltejs/mcp/commit/57e2d1def1f5590d0a3dd6d269ac39f6397ffecf))

packages/opencode/config.ts

@@ -0,0 +1,147 @@
+import type { PluginInput } from '@opencode-ai/plugin';
+import { existsSync, readFileSync } from 'fs';
+import { homedir } from 'os';
+import { join } from 'path';
+import * as v from 'valibot';
+
+const default_config = {
+	mcp: {
+		type: 'remote' as 'remote' | 'local',
+		enabled: true,
+	},
+	subagent: {
+		enabled: true,
+	},
+	instructions: {
+		enabled: true,
+	},
+};
+
+export const config_schema = v.object({
+	mcp: v.optional(
+		v.object({
+			type: v.optional(v.picklist(['remote', 'local'])),
+			enabled: v.optional(v.boolean()),
+		}),
+	),
+	subagent: v.optional(
+		v.object({
+			enabled: v.optional(v.boolean()),
+		}),
+	),
+	instructions: v.optional(
+		v.object({
+			enabled: v.optional(v.boolean()),
+		}),
+	),
+});
+
+export type McpConfig = v.InferInput<typeof config_schema>;
+
+const GLOBAL_CONFIG_DIR = join(homedir(), '.config', 'opencode');
+const GLOBAL_CONFIG_PATH = join(GLOBAL_CONFIG_DIR, 'svelte.json');
+
+interface ConfigLoadResult {
+	data: Record<string, unknown> | null;
+	parse_error?: string;
+}
+
+function get_config_paths() {
+	// Global: ~/.config/opencode/svelte.json
+	let global_path: string | null = null;
+	if (existsSync(GLOBAL_CONFIG_PATH)) {
+		global_path = GLOBAL_CONFIG_PATH;
+	}
+
+	// Custom config directory: $OPENCODE_CONFIG_DIR/svelte.json
+	let config_dir_path: string | null = null;
+	const opencode_config_dir = process.env.OPENCODE_CONFIG_DIR;
+	if (opencode_config_dir) {
+		const config_json = join(opencode_config_dir, 'svelte.json');
+		if (existsSync(config_json)) {
+			config_dir_path = config_json;
+		}
+	}
+
+	// returning config_dir first so it has higher priority
+	return [config_dir_path, global_path];
+}
+
+function load_config_file(config_path: string): ConfigLoadResult {
+	let file_content: string;
+	try {
+		file_content = readFileSync(config_path, 'utf-8');
+	} catch {
+		// File doesn't exist or can't be read
+		return { data: null };
+	}
+
+	try {
+		const parsed = JSON.parse(file_content);
+		if (parsed === undefined || parsed === null) {
+			return { data: null, parse_error: 'Config file is empty or invalid' };
+		}
+		return { data: parsed };
+	} catch (error: unknown) {
+		return {
+			data: null,
+			parse_error: error instanceof Error ? error.message : 'Failed to parse config',
+		};
+	}
+}
+
+function merge_with_defaults(user_config: Partial<McpConfig>): McpConfig {
+	return {
+		mcp: {
+			...default_config.mcp,
+			...user_config.mcp,
+		},
+		subagent: {
+			...default_config.subagent,
+			...user_config.subagent,
+		},
+		instructions: {
+			...default_config.instructions,
+			...user_config.instructions,
+		},
+	};
+}
+
+export function get_mcp_config(ctx: PluginInput) {
+	const config_paths = get_config_paths();
+	for (const path of config_paths) {
+		if (path && existsSync(path)) {
+			const result = load_config_file(path);
+			if (result.parse_error) {
+				setTimeout(() => {
+					ctx.client.tui.showToast({
+						body: {
+							title: 'Svelte: Invalid opencode plugin config',
+							message: `${result.parse_error}\nUsing default values`,
+							variant: 'warning',
+							duration: 7000,
+						},
+					});
+				}, 7000);
+				return default_config;
+			}
+			const parsed = v.safeParse(config_schema, result.data);
+			if (parsed.success) {
+				return merge_with_defaults(parsed.output);
+			} else {
+				setTimeout(() => {
+					ctx.client.tui.showToast({
+						body: {
+							title: 'Svelte: Invalid opencode plugin config',
+							message: `${result.parse_error}\nUsing default values`,
+							variant: 'warning',
+							duration: 7000,
+						},
+					});
+				}, 7000);
+			}
+		}
+	}
+
+	return default_config;
+}

packages/opencode/index.ts

@@ -0,0 +1,72 @@
+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';
+
+const current_dir = dirname(fileURLToPath(import.meta.url));
+
+export const svelte_plugin: Plugin = async (ctx) => {
+	return {
+		async config(input) {
+			input.agent ??= {};
+			input.mcp ??= {};
+			input.instructions ??= [];
+			// by default we use svelte as the name for the svelte MCP server
+			let svelte_mcp_name = 'svelte';
+			// we loop over every mcp server to see if any of them is already the svelte MCP server
+			for (const name in input.mcp) {
+				const mcp = input.mcp[name];
+				if (
+					(mcp?.type === 'remote' && mcp.url.includes('https://mcp.svelte.dev/mcp')) ||
+					(mcp?.type === 'local' &&
+						mcp.command.some((cmd: string) => cmd.includes('@sveltejs/mcp')))
+				) {
+					// if we found the svelte MCP server, we store its name and break
+					svelte_mcp_name = name;
+					break;
+				}
+			}
+			const mcp_config = get_mcp_config(ctx);
+
+			if (mcp_config.instructions?.enabled !== false) {
+				const instructions_dir = join(current_dir, 'instructions');
+				const instructions_paths = await readdir(instructions_dir);
+				input.instructions.push(...instructions_paths.map((file) => join(instructions_dir, file)));
+			}
+
+			// 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 (mcp_config.mcp?.type === 'remote') {
+					input.mcp[svelte_mcp_name] = {
+						type: 'remote',
+						url: 'https://mcp.svelte.dev/mcp',
+					};
+				} else {
+					input.mcp[svelte_mcp_name] = {
+						type: 'local',
+						command: ['npx', '-y', '@sveltejs/mcp'],
+					};
+				}
+			}
+			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,
+					},
+				};
+			}
+		},
+	};
+};

packages/opencode/instructions/opencode-agents.md

@@ -0,0 +1,23 @@
+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 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.

packages/opencode/package.json

@@ -0,0 +1,35 @@
+{
+	"name": "@sveltejs/opencode",
+	"version": "0.0.2",
+	"type": "module",
+	"license": "MIT",
+	"homepage": "https://github.com/sveltejs/mcp#readme",
+	"bugs": {
+		"url": "https://github.com/sveltejs/mcp/issues"
+	},
+	"scripts": {
+		"check": "tsc --noEmit",
+		"generate-schema": "node --import node-resolve-ts/register scripts/generate-schema.ts"
+	},
+	"files": [
+		"index.ts",
+		"config.ts",
+		"instructions"
+	],
+	"repository": {
+		"type": "git",
+		"url": "git+https://github.com/sveltejs/mcp.git",
+		"path": "packages/opencode"
+	},
+	"publishConfig": {
+		"access": "public"
+	},
+	"dependencies": {
+		"valibot": "catalog:tooling"
+	},
+	"devDependencies": {
+		"@opencode-ai/plugin": "catalog:ai",
+		"@valibot/to-json-schema": "catalog:tooling",
+		"@types/node": "catalog:tooling"
+	}
+}

packages/opencode/schema.json

@@ -0,0 +1,40 @@
+{
+	"type": "object",
+	"properties": {
+		"mcp": {
+			"type": "object",
+			"properties": {
+				"type": {
+					"enum": [
+						"remote",
+						"local"
+					]
+				},
+				"enabled": {
+					"type": "boolean"
+				}
+			},
+			"required": []
+		},
+		"subagent": {
+			"type": "object",
+			"properties": {
+				"enabled": {
+					"type": "boolean"
+				}
+			},
+			"required": []
+		},
+		"instructions": {
+			"type": "object",
+			"properties": {
+				"enabled": {
+					"type": "boolean"
+				}
+			},
+			"required": []
+		}
+	},
+	"required": [],
+	"$schema": "http://json-schema.org/draft-07/schema#"
+}

packages/opencode/scripts/generate-schema.ts

@@ -0,0 +1,8 @@
+import { toJsonSchema } from '@valibot/to-json-schema';
+import { config_schema } from '../config.js';
+import fs from 'node:fs';
+import path from 'node:path';
+
+const json_schema = toJsonSchema(config_schema);
+
+fs.writeFileSync(path.resolve('./schema.json'), JSON.stringify(json_schema, null, '\t'));

packages/opencode/tsconfig.json

@@ -0,0 +1,5 @@
+{
+	"extends": "../../tsconfig.json",
+	"include": ["index.ts", "config.ts", "scripts/*"],
+	"exclude": ["node_modules"]
+}

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

@@ -4,5 +4,14 @@
 	"version": "1.0.0",
 	"author": {
 		"name": "Svelte"
+	},
+	"lspServers": {
+		"svelte": {
+			"command": "svelte-language-server",
+			"args": ["--stdio"],
+			"extensionToLanguage": {
+				".svelte": "svelte"
+			}
+		}
 	}
 }

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

@@ -1,6 +1,7 @@
 ---
 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.
+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.

pnpm-lock.yaml

@@ -10,11 +10,14 @@ catalogs:
       specifier: ^0.71.0
       version: 0.71.0
     '@mcp-ui/server':
-      specifier: ^5.12.0
-      version: 5.12.0
+      specifier: ^5.16.3
+      version: 5.16.3
     '@modelcontextprotocol/inspector':
       specifier: ^0.18.0
       version: 0.18.0
+    '@opencode-ai/plugin':
+      specifier: ^1.1.21
+      version: 1.1.21
   lint:
     '@eslint/compat':
       specifier: ^2.0.0
@@ -47,8 +50,8 @@ catalogs:
       specifier: ^3.12.5
       version: 3.12.5
     globals:
-      specifier: ^16.0.0
-      version: 16.4.0
+      specifier: ^17.0.0
+      version: 17.0.0
     prettier:
       specifier: ^3.4.2
       version: 3.6.2
@@ -116,6 +119,9 @@ catalogs:
     '@types/node':
       specifier: ^24.3.1
       version: 24.5.2
+    '@valibot/to-json-schema':
+      specifier: ^1.5.0
+      version: 1.5.0
     '@vercel/analytics':
       specifier: ^1.5.0
       version: 1.5.0
@@ -141,8 +147,8 @@ catalogs:
       specifier: ^5.0.0
       version: 5.9.2
     valibot:
-      specifier: ^1.1.0
-      version: 1.1.0
+      specifier: ^1.2.0
+      version: 1.2.0
     vite:
       specifier: ^7.0.4
       version: 7.1.7
@@ -195,7 +201,7 @@ importers:
         version: 3.12.5(eslint@9.36.0(jiti@2.6.0))(svelte@5.39.6)(ts-node@10.9.2(@types/node@24.5.2)(typescript@5.9.2))
       globals:
         specifier: catalog:lint
-        version: 16.4.0
+        version: 17.0.0
       node-resolve-ts:
         specifier: catalog:tooling
         version: 1.0.2
@@ -277,7 +283,7 @@ importers:
         version: 3.12.5(eslint@9.36.0(jiti@2.6.0))(svelte@5.39.6)(ts-node@10.9.2(@types/node@24.5.2)(typescript@5.9.2))
       globals:
         specifier: catalog:lint
-        version: 16.4.0
+        version: 17.0.0
       prettier:
         specifier: catalog:lint
         version: 3.6.2
@@ -316,7 +322,7 @@ importers:
     dependencies:
       '@mcp-ui/server':
         specifier: catalog:ai
-        version: 5.12.0
+        version: 5.16.3(hono@4.11.1)(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(zod@4.1.8)
       '@sveltejs/mcp-schema':
         specifier: workspace:^
         version: link:../mcp-schema
@@ -365,7 +371,7 @@ importers:
     devDependencies:
       '@anthropic-ai/sdk':
         specifier: catalog:ai
-        version: 0.71.0(zod@3.25.76)
+        version: 0.71.0(zod@4.1.8)
       '@sveltejs/kit':
         specifier: catalog:svelte
         version: 2.43.5(@sveltejs/vite-plugin-svelte@6.2.1(svelte@5.39.6)(vite@7.1.7(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1)))(svelte@5.39.6)(vite@7.1.7(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1))
@@ -416,6 +422,22 @@ importers:
         specifier: catalog:tooling
         version: 4.0.1(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1)
 
+  packages/opencode:
+    dependencies:
+      valibot:
+        specifier: catalog:tooling
+        version: 1.2.0(typescript@5.9.2)
+    devDependencies:
+      '@opencode-ai/plugin':
+        specifier: catalog:ai
+        version: 1.1.21
+      '@types/node':
+        specifier: catalog:tooling
+        version: 24.5.2
+      '@valibot/to-json-schema':
+        specifier: catalog:tooling
+        version: 1.5.0(valibot@1.2.0(typescript@5.9.2))
+
 packages:
 
   '@anthropic-ai/sdk@0.71.0':
@@ -1018,8 +1040,21 @@ packages:
     engines: {node: '>=18'}
     hasBin: true
 
-  '@mcp-ui/server@5.12.0':
-    resolution: {integrity: sha512-ZAAHsvzfrBgA0gkyIOjoKNTBTsD0VSJT4KXKHe+Fx/kBASctG6mrzK5gvxD/LLLliantN2UWLTKtEeI4DH4FRQ==}
+  '@mcp-ui/server@5.16.3':
+    resolution: {integrity: sha512-MZttML9tQC1B8f4SPgoT1BORfCDXqs4Ywb/mQ0wSwIYS9AuIWFLj1KXmvqC/zrG0SlNMlyvMSxEX/eVYsIoZaA==}
+
+  '@modelcontextprotocol/ext-apps@0.2.2':
+    resolution: {integrity: sha512-h8sN3QIBLqMsRXjKL76M5VmBQf3N0I1G1DiDiSYAgtdynYQctHqCs79WEo1d5wClyZVYBWXdRcxgiR/WBfSOqw==}
+    peerDependencies:
+      '@modelcontextprotocol/sdk': ^1.24.0
+      react: ^17.0.0 || ^18.0.0 || ^19.0.0
+      react-dom: ^17.0.0 || ^18.0.0 || ^19.0.0
+      zod: ^3.25.0 || ^4.0.0
+    peerDependenciesMeta:
+      react:
+        optional: true
+      react-dom:
+        optional: true
 
   '@modelcontextprotocol/inspector-cli@0.18.0':
     resolution: {integrity: sha512-QMPjKx8zKmX17S1LF2gWuwbYglKexkdgB0HhKZFXzGrQ0MYoKUsIgokMyV48xr4LipaLS3b2v3ut3nV/jhWeSg==}
@@ -1038,10 +1073,6 @@ packages:
     engines: {node: '>=22.7.5'}
     hasBin: true
 
-  '@modelcontextprotocol/sdk@1.18.2':
-    resolution: {integrity: sha512-beedclIvFcCnPrYgHsylqiYJVJ/CI47Vyc4tY8no1/Li/O8U4BTlJfy6ZwxkYwx+Mx10nrgwSVrA7VBbhh4slg==}
-    engines: {node: '>=18'}
-
   '@modelcontextprotocol/sdk@1.25.1':
     resolution: {integrity: sha512-yO28oVFFC7EBoiKdAn+VqRm+plcfv4v0xp6osG/VsCB0NlPZWi87ajbCZZ8f/RvOFLEu7//rSRmuZZ7lMoe3gQ==}
     engines: {node: '>=18'}
@@ -1070,6 +1101,67 @@ packages:
     resolution: {integrity: sha512-oGB+UxlgWcgQkgwo8GcEGwemoTFt3FIO9ababBmaGwXIoBKZ+GTy0pP185beGg7Llih/NSHSV2XAs1lnznocSg==}
     engines: {node: '>= 8'}
 
+  '@opencode-ai/plugin@1.1.21':
+    resolution: {integrity: sha512-oAWVlKG7LACGFYawfdHGMN6e+6lyN6F+zPVncFUB99BrTl/TjELE5gTZwU7MalGpjwfU77yslBOZm4BXVAYGvw==}
+
+  '@opencode-ai/sdk@1.1.21':
+    resolution: {integrity: sha512-4M6lBjRPlPz99Rb5rS5ZqKrb0UDDxOT9VTG06JpNxvA7ynTd8C50ckc2NGzWtvjarmxfaAk1VeuBYN/cq2pIKQ==}
+
+  '@oven/bun-darwin-aarch64@1.3.5':
+    resolution: {integrity: sha512-8GvNtMo0NINM7Emk9cNAviCG3teEgr3BUX9be0+GD029zIagx2Sf54jMui1Eu1IpFm7nWHODuLEefGOQNaJ0gQ==}
+    cpu: [arm64]
+    os: [darwin]
+
+  '@oven/bun-darwin-x64-baseline@1.3.5':
+    resolution: {integrity: sha512-p5q3rJk48qhLuLBOFehVc+kqCE03YrswTc6NCxbwsxiwfySXwcAvpF2KWKF/ZZObvvR8hCCvqe1F81b2p5r2dg==}
+    cpu: [x64]
+    os: [darwin]
+
+  '@oven/bun-darwin-x64@1.3.5':
+    resolution: {integrity: sha512-r33eHQOHAwkuiBJIwmkXIyqONQOQMnd1GMTpDzaxx9vf9+svby80LZO9Hcm1ns6KT/TBRFyODC/0loA7FAaffg==}
+    cpu: [x64]
+    os: [darwin]
+
+  '@oven/bun-linux-aarch64-musl@1.3.5':
+    resolution: {integrity: sha512-HKBeUlJdNduRkzJKZ5DXM+pPqntfC50/Hu2X65jVX0Y7hu/6IC8RaUTqpr8FtCZqqmc9wDK0OTL+Mbi9UQIKYQ==}
+    cpu: [arm64]
+    os: [linux]
+
+  '@oven/bun-linux-aarch64@1.3.5':
+    resolution: {integrity: sha512-zkcHPI23QxJ1TdqafhgkXt1NOEN8o5C460sVeNnrhfJ43LwZgtfcvcQE39x/pBedu67fatY8CU0iY00nOh46ZQ==}
+    cpu: [arm64]
+    os: [linux]
+
+  '@oven/bun-linux-x64-baseline@1.3.5':
+    resolution: {integrity: sha512-FeCQyBU62DMuB0nn01vPnf3McXrKOsrK9p7sHaBFYycw0mmoU8kCq/WkBkGMnLuvQljJSyen8QBTx+fXdNupWg==}
+    cpu: [x64]
+    os: [linux]
+
+  '@oven/bun-linux-x64-musl-baseline@1.3.5':
+    resolution: {integrity: sha512-TJiYC7KCr0XxFTsxgwQOeE7dncrEL/RSyL0EzSL3xRkrxJMWBCvCSjQn7LV1i6T7hFst0+3KoN3VWvD5BinqHA==}
+    cpu: [x64]
+    os: [linux]
+
+  '@oven/bun-linux-x64-musl@1.3.5':
+    resolution: {integrity: sha512-XkCCHkByYn8BIDvoxnny898znju4xnW2kvFE8FT5+0Y62cWdcBGMZ9RdsEUTeRz16k8hHtJpaSfLcEmNTFIwRQ==}
+    cpu: [x64]
+    os: [linux]
+
+  '@oven/bun-linux-x64@1.3.5':
+    resolution: {integrity: sha512-n7zhKTSDZS0yOYg5Rq8easZu5Y/o47sv0c7yGr2ciFdcie9uYV55fZ7QMqhWMGK33ezCSikh5EDkUMCIvfWpjA==}
+    cpu: [x64]
+    os: [linux]
+
+  '@oven/bun-windows-x64-baseline@1.3.5':
+    resolution: {integrity: sha512-rtVQB9/1XK8FWJgFtsOthbPifRMYypgJwxu+pK3NHx8WvFKmq7HcPDqNr8xLzGULjQEO7eAo2aOZfONOwYz+5g==}
+    cpu: [x64]
+    os: [win32]
+
+  '@oven/bun-windows-x64@1.3.5':
+    resolution: {integrity: sha512-T3xkODItb/0ftQPFsZDc7EAX2D6A4TEazQ2YZyofZToO8Q7y8YT8ooWdhd0BQiTCd66uEvgE1DCZetynwg2IoA==}
+    cpu: [x64]
+    os: [win32]
+
   '@oxc-project/types@0.101.0':
     resolution: {integrity: sha512-nuFhqlUzJX+gVIPPfuE6xurd4lST3mdcWOhyK/rZO0B9XWMKm79SuszIQEnSMmmDhq1DC8WWVYGVd+6F93o1gQ==}
 
@@ -1581,11 +1673,21 @@ packages:
     cpu: [arm64]
     os: [darwin]
 
+  '@rollup/rollup-darwin-arm64@4.55.1':
+    resolution: {integrity: sha512-p3grE2PHcQm2e8PSGZdzIhCKbMCw/xi9XvMPErPhwO17vxtvCN5FEA2mSLgmKlCjHGMQTP6phuQTYWUnKewwGg==}
+    cpu: [arm64]
+    os: [darwin]
+
   '@rollup/rollup-darwin-x64@4.52.2':
     resolution: {integrity: sha512-h11KikYrUCYTrDj6h939hhMNlqU2fo/X4NB0OZcys3fya49o1hmFaczAiJWVAFgrM1NCP6RrO7lQKeVYSKBPSQ==}
     cpu: [x64]
     os: [darwin]
 
+  '@rollup/rollup-darwin-x64@4.55.1':
+    resolution: {integrity: sha512-rDUjG25C9qoTm+e02Esi+aqTKSBYwVTaoS1wxcN47/Luqef57Vgp96xNANwt5npq9GDxsH7kXxNkJVEsWEOEaQ==}
+    cpu: [x64]
+    os: [darwin]
+
   '@rollup/rollup-freebsd-arm64@4.52.2':
     resolution: {integrity: sha512-/eg4CI61ZUkLXxMHyVlmlGrSQZ34xqWlZNW43IAU4RmdzWEx0mQJ2mN/Cx4IHLVZFL6UBGAh+/GXhgvGb+nVxw==}
     cpu: [arm64]
@@ -1611,6 +1713,11 @@ packages:
     cpu: [arm64]
     os: [linux]
 
+  '@rollup/rollup-linux-arm64-gnu@4.55.1':
+    resolution: {integrity: sha512-a59mwd1k6x8tXKcUxSyISiquLwB5pX+fJW9TkWU46lCqD/GRDe9uDN31jrMmVP3feI3mhAdvcCClhV8V5MhJFQ==}
+    cpu: [arm64]
+    os: [linux]
+
   '@rollup/rollup-linux-arm64-musl@4.52.2':
     resolution: {integrity: sha512-s+OPucLNdJHvuZHuIz2WwncJ+SfWHFEmlC5nKMUgAelUeBUnlB4wt7rXWiyG4Zn07uY2Dd+SGyVa9oyLkVGOjA==}
     cpu: [arm64]
@@ -1646,6 +1753,11 @@ packages:
     cpu: [x64]
     os: [linux]
 
+  '@rollup/rollup-linux-x64-gnu@4.55.1':
+    resolution: {integrity: sha512-a8G4wiQxQG2BAvo+gU6XrReRRqj+pLS2NGXKm8io19goR+K8lw269eTrPkSdDTALwMmJp4th2Uh0D8J9bEV1vg==}
+    cpu: [x64]
+    os: [linux]
+
   '@rollup/rollup-linux-x64-musl@4.52.2':
     resolution: {integrity: sha512-LSeBHnGli1pPKVJ79ZVJgeZWWZXkEe/5o8kcn23M8eMKCUANejchJbF/JqzM4RRjOJfNRhKJk8FuqL1GKjF5oQ==}
     cpu: [x64]
@@ -1676,6 +1788,11 @@ packages:
     cpu: [x64]
     os: [win32]
 
+  '@rollup/rollup-win32-x64-msvc@4.55.1':
+    resolution: {integrity: sha512-SPEpaL6DX4rmcXtnhdrQYgzQ5W2uW3SCJch88lB2zImhJRhIIK44fkUrgIV/Q8yUNfw5oyZ5vkeQsZLhCb06lw==}
+    cpu: [x64]
+    os: [win32]
+
   '@rtsao/scc@1.1.0':
     resolution: {integrity: sha512-zt6OdqaDoOnJ1ZYsCYGt9YmWzDXl4vQdKTyJev62gFhRGKdx7mcT54V9KIjg+d2wi9EXsPvAPKe7i7WjfVWB8g==}
 
@@ -1870,6 +1987,11 @@ packages:
     peerDependencies:
       valibot: ^1.1.0
 
+  '@valibot/to-json-schema@1.5.0':
+    resolution: {integrity: sha512-GE7DmSr1C2UCWPiV0upRH6mv0cCPsqYGs819fb6srCS1tWhyXrkGGe+zxUiwzn/L1BOfADH4sNjY/YHCuP8phQ==}
+    peerDependencies:
+      valibot: ^1.2.0
+
   '@vercel/analytics@1.5.0':
     resolution: {integrity: sha512-MYsBzfPki4gthY5HnYN7jgInhAZ7Ac1cYDoRWFomwGHWEX7odTEzbtg9kf/QSo7XEsEAqlQugA6gJ2WS2DEa3g==}
     peerDependencies:
@@ -2833,6 +2955,10 @@ packages:
     resolution: {integrity: sha512-ob/2LcVVaVGCYN+r14cnwnoDPUufjiYgSqRhiFD0Q1iI4Odora5RE8Iv1D24hAz5oMophRGkGz+yuvQmmUMnMw==}
     engines: {node: '>=18'}
 
+  globals@17.0.0:
+    resolution: {integrity: sha512-gv5BeD2EssA793rlFWVPMMCqefTlpusw6/2TbAVMy0FzcG8wKJn4O+NqJ4+XWmmwrayJgw5TzrmWjFgmz1XPqw==}
+    engines: {node: '>=18'}
+
   globalthis@1.0.4:
     resolution: {integrity: sha512-DpLKbNU4WylpxJykQujfCcwYWiV/Jhm50Goo0wrVILAv5jOr9d+H+UR3PhSCD2rCCEIg0uc+G+muBTwD54JhDQ==}
     engines: {node: '>= 0.4'}
@@ -4139,6 +4265,14 @@ packages:
       typescript:
         optional: true
 
+  valibot@1.2.0:
+    resolution: {integrity: sha512-mm1rxUsmOxzrwnX5arGS+U4T25RdvpPjPN4yR0u9pUBov9+zGVtO84tif1eY4r6zWxVxu3KzIyknJy3rxfRZZg==}
+    peerDependencies:
+      typescript: '>=5'
+    peerDependenciesMeta:
+      typescript:
+        optional: true
+
   vary@1.1.2:
     resolution: {integrity: sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==}
     engines: {node: '>= 0.8'}
@@ -4342,11 +4476,6 @@ packages:
   zimmerframe@1.1.4:
     resolution: {integrity: sha512-B58NGBEoc8Y9MWWCQGl/gq9xBCe4IiKM0a2x7GZdQKOW5Exr8S1W24J6OgM1njK8xCRGvAJIL/MxXHf6SkmQKQ==}
 
-  zod-to-json-schema@3.24.6:
-    resolution: {integrity: sha512-h/z3PKvcTcTetyjl1fkj79MHNEjm+HpD6NXheWjzOekY7kV+lwDYnHw+ivHkijnCSMz1yJaWBD9vu/Fcmk+vEg==}
-    peerDependencies:
-      zod: ^3.24.1
-
   zod-to-json-schema@3.25.0:
     resolution: {integrity: sha512-HvWtU2UG41LALjajJrML6uQejQhNJx+JBO9IflpSja4R03iNWfKXrj6W2h7ljuLyc1nKS+9yDyL/9tD1U/yBnQ==}
     peerDependencies:
@@ -4355,13 +4484,16 @@ packages:
   zod@3.25.76:
     resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
 
+  zod@4.1.8:
+    resolution: {integrity: sha512-5R1P+WwQqmmMIEACyzSvo4JXHY5WiAFHRMg+zBZKgKS+Q1viRa0C1hmUKtHltoIFKtIdki3pRxkmpP74jnNYHQ==}
+
 snapshots:
 
-  '@anthropic-ai/sdk@0.71.0(zod@3.25.76)':
+  '@anthropic-ai/sdk@0.71.0(zod@4.1.8)':
     dependencies:
       json-schema-to-ts: 3.1.1
     optionalDependencies:
-      zod: 3.25.76
+      zod: 4.1.8
 
   '@babel/generator@7.28.5':
     dependencies:
@@ -4934,11 +5066,42 @@ snapshots:
       - encoding
       - supports-color
 
-  '@mcp-ui/server@5.12.0':
+  '@mcp-ui/server@5.16.3(hono@4.11.1)(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(zod@4.1.8)':
     dependencies:
-      '@modelcontextprotocol/sdk': 1.18.2
+      '@modelcontextprotocol/ext-apps': 0.2.2(@modelcontextprotocol/sdk@1.25.1(hono@4.11.1)(zod@4.1.8))(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(zod@4.1.8)
+      '@modelcontextprotocol/sdk': 1.25.1(hono@4.11.1)(zod@4.1.8)
     transitivePeerDependencies:
+      - '@cfworker/json-schema'
+      - hono
+      - react
+      - react-dom
       - supports-color
+      - zod
+
+  '@modelcontextprotocol/ext-apps@0.2.2(@modelcontextprotocol/sdk@1.25.1(hono@4.11.1)(zod@4.1.8))(react-dom@18.3.1(react@18.3.1))(react@18.3.1)(zod@4.1.8)':
+    dependencies:
+      '@modelcontextprotocol/sdk': 1.25.1(hono@4.11.1)(zod@4.1.8)
+      prettier: 3.6.2
+      zod: 4.1.8
+    optionalDependencies:
+      '@oven/bun-darwin-aarch64': 1.3.5
+      '@oven/bun-darwin-x64': 1.3.5
+      '@oven/bun-darwin-x64-baseline': 1.3.5
+      '@oven/bun-linux-aarch64': 1.3.5
+      '@oven/bun-linux-aarch64-musl': 1.3.5
+      '@oven/bun-linux-x64': 1.3.5
+      '@oven/bun-linux-x64-baseline': 1.3.5
+      '@oven/bun-linux-x64-musl': 1.3.5
+      '@oven/bun-linux-x64-musl-baseline': 1.3.5
+      '@oven/bun-windows-x64': 1.3.5
+      '@oven/bun-windows-x64-baseline': 1.3.5
+      '@rollup/rollup-darwin-arm64': 4.55.1
+      '@rollup/rollup-darwin-x64': 4.55.1
+      '@rollup/rollup-linux-arm64-gnu': 4.55.1
+      '@rollup/rollup-linux-x64-gnu': 4.55.1
+      '@rollup/rollup-win32-x64-msvc': 4.55.1
+      react: 18.3.1
+      react-dom: 18.3.1(react@18.3.1)
 
   '@modelcontextprotocol/inspector-cli@0.18.0(hono@4.11.1)(zod@3.25.76)':
     dependencies:
@@ -5027,23 +5190,6 @@ snapshots:
       - typescript
       - utf-8-validate
 
-  '@modelcontextprotocol/sdk@1.18.2':
-    dependencies:
-      ajv: 6.12.6
-      content-type: 1.0.5
-      cors: 2.8.5
-      cross-spawn: 7.0.6
-      eventsource: 3.0.7
-      eventsource-parser: 3.0.6
-      express: 5.1.0
-      express-rate-limit: 7.5.1(express@5.1.0)
-      pkce-challenge: 5.0.0
-      raw-body: 3.0.1
-      zod: 3.25.76
-      zod-to-json-schema: 3.24.6(zod@3.25.76)
-    transitivePeerDependencies:
-      - supports-color
-
   '@modelcontextprotocol/sdk@1.25.1(hono@4.11.1)(zod@3.25.76)':
     dependencies:
       '@hono/node-server': 1.19.7(hono@4.11.1)
@@ -5066,6 +5212,28 @@ snapshots:
       - hono
       - supports-color
 
+  '@modelcontextprotocol/sdk@1.25.1(hono@4.11.1)(zod@4.1.8)':
+    dependencies:
+      '@hono/node-server': 1.19.7(hono@4.11.1)
+      ajv: 8.17.1
+      ajv-formats: 3.0.1(ajv@8.17.1)
+      content-type: 1.0.5
+      cors: 2.8.5
+      cross-spawn: 7.0.6
+      eventsource: 3.0.7
+      eventsource-parser: 3.0.6
+      express: 5.1.0
+      express-rate-limit: 7.5.1(express@5.1.0)
+      jose: 6.1.3
+      json-schema-typed: 8.0.2
+      pkce-challenge: 5.0.0
+      raw-body: 3.0.1
+      zod: 4.1.8
+      zod-to-json-schema: 3.25.0(zod@4.1.8)
+    transitivePeerDependencies:
+      - hono
+      - supports-color
+
   '@napi-rs/wasm-runtime@1.1.0':
     dependencies:
       '@emnapi/core': 1.7.1
@@ -5087,6 +5255,46 @@ snapshots:
       '@nodelib/fs.scandir': 2.1.5
       fastq: 1.19.1
 
+  '@opencode-ai/plugin@1.1.21':
+    dependencies:
+      '@opencode-ai/sdk': 1.1.21
+      zod: 4.1.8
+
+  '@opencode-ai/sdk@1.1.21': {}
+
+  '@oven/bun-darwin-aarch64@1.3.5':
+    optional: true
+
+  '@oven/bun-darwin-x64-baseline@1.3.5':
+    optional: true
+
+  '@oven/bun-darwin-x64@1.3.5':
+    optional: true
+
+  '@oven/bun-linux-aarch64-musl@1.3.5':
+    optional: true
+
+  '@oven/bun-linux-aarch64@1.3.5':
+    optional: true
+
+  '@oven/bun-linux-x64-baseline@1.3.5':
+    optional: true
+
+  '@oven/bun-linux-x64-musl-baseline@1.3.5':
+    optional: true
+
+  '@oven/bun-linux-x64-musl@1.3.5':
+    optional: true
+
+  '@oven/bun-linux-x64@1.3.5':
+    optional: true
+
+  '@oven/bun-windows-x64-baseline@1.3.5':
+    optional: true
+
+  '@oven/bun-windows-x64@1.3.5':
+    optional: true
+
   '@oxc-project/types@0.101.0': {}
 
   '@petamoriken/float16@3.9.2':
@@ -5468,9 +5676,15 @@ snapshots:
   '@rollup/rollup-darwin-arm64@4.52.2':
     optional: true
 
+  '@rollup/rollup-darwin-arm64@4.55.1':
+    optional: true
+
   '@rollup/rollup-darwin-x64@4.52.2':
     optional: true
 
+  '@rollup/rollup-darwin-x64@4.55.1':
+    optional: true
+
   '@rollup/rollup-freebsd-arm64@4.52.2':
     optional: true
 
@@ -5486,6 +5700,9 @@ snapshots:
   '@rollup/rollup-linux-arm64-gnu@4.52.2':
     optional: true
 
+  '@rollup/rollup-linux-arm64-gnu@4.55.1':
+    optional: true
+
   '@rollup/rollup-linux-arm64-musl@4.52.2':
     optional: true
 
@@ -5507,6 +5724,9 @@ snapshots:
   '@rollup/rollup-linux-x64-gnu@4.52.2':
     optional: true
 
+  '@rollup/rollup-linux-x64-gnu@4.55.1':
+    optional: true
+
   '@rollup/rollup-linux-x64-musl@4.52.2':
     optional: true
 
@@ -5525,6 +5745,9 @@ snapshots:
   '@rollup/rollup-win32-x64-msvc@4.52.2':
     optional: true
 
+  '@rollup/rollup-win32-x64-msvc@4.55.1':
+    optional: true
+
   '@rtsao/scc@1.1.0': {}
 
   '@standard-schema/spec@1.0.0': {}
@@ -5764,6 +5987,10 @@ snapshots:
     dependencies:
       valibot: 1.1.0(typescript@5.9.2)
 
+  '@valibot/to-json-schema@1.5.0(valibot@1.2.0(typescript@5.9.2))':
+    dependencies:
+      valibot: 1.2.0(typescript@5.9.2)
+
   '@vercel/analytics@1.5.0(@sveltejs/kit@2.43.5(@sveltejs/vite-plugin-svelte@6.2.1(svelte@5.39.6)(vite@7.1.7(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1)))(svelte@5.39.6)(vite@7.1.7(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1)))(react@18.3.1)(svelte@5.39.6)':
     optionalDependencies:
       '@sveltejs/kit': 2.43.5(@sveltejs/vite-plugin-svelte@6.2.1(svelte@5.39.6)(vite@7.1.7(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1)))(svelte@5.39.6)(vite@7.1.7(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1))
@@ -6795,6 +7022,8 @@ snapshots:
 
   globals@16.4.0: {}
 
+  globals@17.0.0: {}
+
   globalthis@1.0.4:
     dependencies:
       define-properties: 1.2.1
@@ -8117,6 +8346,10 @@ snapshots:
     optionalDependencies:
       typescript: 5.9.2
 
+  valibot@1.2.0(typescript@5.9.2):
+    optionalDependencies:
+      typescript: 5.9.2
+
   vary@1.1.2: {}
 
   vite-plugin-devtools-json@1.0.0(vite@7.1.7(@types/node@24.5.2)(jiti@2.6.0)(tsx@4.20.6)(yaml@2.8.1)):
@@ -8298,12 +8531,14 @@ snapshots:
 
   zimmerframe@1.1.4: {}
 
-  zod-to-json-schema@3.24.6(zod@3.25.76):
-    dependencies:
-      zod: 3.25.76
-
   zod-to-json-schema@3.25.0(zod@3.25.76):
     dependencies:
       zod: 3.25.76
 
+  zod-to-json-schema@3.25.0(zod@4.1.8):
+    dependencies:
+      zod: 4.1.8
+
   zod@3.25.76: {}
+
+  zod@4.1.8: {}

pnpm-workspace.yaml

@@ -5,8 +5,9 @@ packages:
 catalogs:
   ai:
     '@anthropic-ai/sdk': ^0.71.0
-    '@mcp-ui/server': ^5.12.0
+    '@mcp-ui/server': ^5.16.3
     '@modelcontextprotocol/inspector': ^0.18.0
+    '@opencode-ai/plugin': ^1.1.21
   lint:
     '@eslint/compat': ^2.0.0
     '@eslint/js': ^9.36.0
@@ -18,7 +19,7 @@ catalogs:
     eslint-plugin-import: ^2.32.0
     eslint-plugin-pnpm: ^1.3.0
     eslint-plugin-svelte: ^3.12.5
-    globals: ^16.0.0
+    globals: ^17.0.0
     prettier: ^3.4.2
     prettier-plugin-svelte: ^3.3.3
     svelte-eslint-parser: ^1.4.0
@@ -44,6 +45,7 @@ catalogs:
     '@svitejs/changesets-changelog-github-compact': ^1.2.0
     '@types/estree': ^1.0.8
     '@types/node': ^24.3.1
+    '@valibot/to-json-schema': ^1.5.0
     '@vercel/analytics': ^1.5.0
     dotenv: ^17.2.3
     node-resolve-ts: ^1.0.2
@@ -52,7 +54,7 @@ catalogs:
     ts-blank-space: ^0.6.2
     tsdown: ^0.18.0
     typescript: ^5.0.0
-    valibot: ^1.1.0
+    valibot: ^1.2.0
     vite: ^7.0.4
     vite-plugin-devtools-json: ^1.0.0
     vitest: ^4.0.0