feat(integrations): add omp support (#3107)

* feat(integrations): add omp support

* Update updated_at timestamp

* refactor(integrations): delegate omp build_exec_args to base, register in issue templates

Inherit MarkdownIntegration.build_exec_args so omp picks up shared CLI
contract changes (requires_cli gating, extra-args ordering, --model
handling) automatically; only specialize the --mode json flag.

Also add Oh My Pi / omp to the issue-template agent lists so
test_issue_template_agent_lists_match_runtime_integrations passes.

* fix(integrations): use --print + positional prompt for omp argv

OMP's CLI parser treats `-p`/`--print` as a boolean (one-shot mode)
and consumes the prompt as a positional message; the previous
inherited `-p <prompt>` shape worked by accident only because `-p`
ignores its next token. Build the argv explicitly with flags first
and the prompt as a trailing positional, matching upstream args.ts.

docs/installation.md

@@ -3,7 +3,7 @@
 ## Prerequisites
 
 - **Linux/macOS** (or Windows; PowerShell scripts now supported without WSL)
-- AI coding agent: [Claude Code](https://www.anthropic.com/claude-code), [GitHub Copilot](https://code.visualstudio.com/), [Codebuddy CLI](https://www.codebuddy.ai/cli), [Gemini CLI](https://github.com/google-gemini/gemini-cli), or [Pi Coding Agent](https://pi.dev)
+- AI coding agent: [Claude Code](https://www.anthropic.com/claude-code), [GitHub Copilot](https://code.visualstudio.com/), [Codebuddy CLI](https://www.codebuddy.ai/cli), [Gemini CLI](https://github.com/google-gemini/gemini-cli), [Pi Coding Agent](https://pi.dev), or [Oh My Pi](https://www.npmjs.com/package/@oh-my-pi/pi-coding-agent)
 - [uv](https://docs.astral.sh/uv/) for package management (recommended) or [pipx](https://pipx.pypa.io/) for persistent installation
 - [Python 3.11+](https://www.python.org/downloads/)
 - [Git](https://git-scm.com/downloads) _(optional — required only when the git extension is enabled)_
@@ -51,6 +51,7 @@ specify init <project_name> --integration gemini
 specify init <project_name> --integration copilot
 specify init <project_name> --integration codebuddy
 specify init <project_name> --integration pi
+specify init <project_name> --integration omp
 ```
 
 ### Specify Script Type (Shell vs PowerShell)

docs/reference/integrations.md

@@ -29,6 +29,7 @@ The Specify CLI supports a wide range of AI coding agents. When you run `specify
 | [Kiro CLI](https://kiro.dev/docs/cli/)                                               | `kiro-cli`       | Kiro CLI does not substitute `$ARGUMENTS` in file-based prompts, so Spec Kit ships a prose fallback at render time (see [Manage prompts](https://kiro.dev/docs/cli/chat/manage-prompts/) and issue [#1926](https://github.com/github/spec-kit/issues/1926)). Alias: `--integration kiro` |
 | [Lingma](https://lingma.aliyun.com/)                                                 | `lingma`         | Skills-based integration; skills are installed automatically                                                                               |
 | [Mistral Vibe](https://github.com/mistralai/mistral-vibe)                            | `vibe`           |                                                                                                                                           |
+| [Oh My Pi](https://www.npmjs.com/package/@oh-my-pi/pi-coding-agent)                  | `omp`            | Installs slash commands into `.omp/commands`                                                                                               |
 | [opencode](https://opencode.ai/)                                                     | `opencode`       |                                                                                                                                           |
 | [Pi Coding Agent](https://pi.dev)                                                    | `pi`             | Pi doesn't have MCP support out of the box, so `taskstoissues` won't work as intended. MCP support can be added via [extensions](https://github.com/badlogic/pi-mono/tree/main/packages/coding-agent#extensions) |
 | [Qoder CLI](https://qoder.com/cli)                                                   | `qodercli`       |                                                                                                                                           |

docs/upgrade.md

@@ -308,6 +308,7 @@ Alternatively, run the `/speckit.specify` command which creates `.specify/featur
    ls -la .gemini/commands/      # Gemini
    ls -la .cursor/skills/      # Cursor
    ls -la .pi/prompts/           # Pi Coding Agent
+   ls -la .omp/commands/         # Oh My Pi
    ```
 
 3. **Check agent-specific setup:**
@@ -427,7 +428,7 @@ The `specify` CLI tool is used for:
 - **Upgrades:** `specify init --here --force` to update templates and commands
 - **Diagnostics:** `specify check` to verify tool installation
 
-Once you've run `specify init`, the slash commands (like `/speckit.specify`, `/speckit.plan`, etc.) are **permanently installed** in your project's agent folder (`.claude/`, `.github/prompts/`, `.pi/prompts/`, etc.). Your AI coding agent reads these command files directly—no need to run `specify` again.
+Once you've run `specify init`, the slash commands (like `/speckit.specify`, `/speckit.plan`, etc.) are **permanently installed** in your project's agent folder (`.claude/`, `.github/prompts/`, `.pi/prompts/`, `.omp/commands/`, etc.). Your AI coding agent reads these command files directly—no need to run `specify` again.
 
 **If your agent isn't recognizing slash commands:**
 
@@ -442,6 +443,9 @@ Once you've run `specify init`, the slash commands (like `/speckit.specify`, `/s
 
    # For Pi
    ls -la .pi/prompts/
+
+   # For Oh My Pi
+   ls -la .omp/commands/
    ```
 
 2. **Restart your IDE/editor completely** (not just reload window)