Prompt Library VS Code Extension

A minimal VS Code extension that provides a generic prompt library for GitHub Copilot Chat. The extension reads prompt/agent markdown files under .github/ and makes them available as chat commands.

Features

Generic prompt library system that reads from markdown files
Easy to extend with new prompts
Integration with GitHub Copilot Chat

Available Commands

`/code-review`

Runs the code review prompt.

`/Test`

Generates test cases.

`/ultimate-secure-fix`

Scans the current file for security vulnerabilities.

`/update-impl`

Implements an explicit Jira/iTrack ticket in the current workspace using MCP work-item retrieval.

Reuses prior assigned-work-items results from chat context when available.
Resolves the exact ticket key/id provided by the user.
Fetches full ticket details before proposing/performing implementation.

Command Tool Access

The extension now uses per-command tool whitelists instead of sending the full VS Code tool registry for tool-enabled agents.

Command	Tool mode	Allowed tools
`/code-review`	Enabled	Read/search workspace, inspect usages, check problems/changed files/test failures, fetch docs/web references, browse extensions/API docs, manage todos, run subagent
`/ultimate-secure-fix`	Enabled	Read/search workspace, inspect usages, edit/create files, check errors, manage todos
`/Test`	Enabled	Read/search workspace, inspect usages, edit/create files, check errors, manage todos
`/update-impl`	Enabled	Work-item retrieval, read/search workspace, inspect usages, edit/create files, check errors/changes, run terminal, manage todos, run subagent

This keeps code-review, ultimate-secure-fix, Test, and update-impl below the model tool-count limit while preserving the tools each agent is meant to use.

Project Structure

.
├── .github/
│   ├── agents/               # Agent instructions (YAML frontmatter)
│   └── prompts/              # Prompt templates
├── src/
│   └── extension.ts          # Main extension code
├── package.json              # Extension manifest
├── tsconfig.json            # TypeScript configuration
└── README.md

How to Use

Install dependencies:
```
npm install
```
Compile the extension:
```
npm run compile
```
Press F5 in VS Code to launch the extension in a new Extension Development Host window
Open GitHub Copilot Chat and use one of:
- @prompt-library /code-review
- @prompt-library /Test
- @prompt-library /ultimate-secure-fix
- @prompt-library /update-impl

Adding New Prompts

To add a new prompt:

Create a new markdown file in the prompts/ folder (e.g., prompts/my-prompt.md)
Write your prompt content in the markdown file
Add a new command in package.json under contributes.chatParticipants[0].commands
Add an entry to the COMMAND_PROMPT_MAP in src/extension.ts mapping the command name to the prompt file

Development

Compile: npm run compile
Watch mode: npm run watch

Requirements

VS Code 1.106.0 or higher
GitHub Copilot extension

Prompt Library Mcp Plugin