feat: add GitHub Action for issue comment commands

Implements a GitHub Action that responds to /mycoder pr and /mycoder plan commands in issue comments. This allows users to trigger MyCoder directly from GitHub issues. Closes #162.

Author: bhouston

.github/workflows/issue-comment.yml

@@ -0,0 +1,59 @@
+name: MyCoder Issue Comment Action
+
+on:
+  issue_comment:
+    types: [created]
+
+permissions:
+  contents: write
+  issues: write
+  pull-requests: write
+
+env:
+  PNPM_VERSION: 10.2.1
+
+jobs:
+  process-comment:
+    runs-on: ubuntu-latest
+    if: contains(github.event.comment.body, '/mycoder pr') || contains(github.event.comment.body, '/mycoder plan')
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: ${{ env.PNPM_VERSION }}
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: 'pnpm'
+
+      - name: Install MyCoder
+        run: pnpm install -g mycoder
+
+      - name: Run MyCoder PR command
+        if: contains(github.event.comment.body, '/mycoder pr')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          XAI_API_KEY: ${{ secrets.XAI_API_KEY }}
+          MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
+        run: |
+          echo "Running MyCoder to implement PR for issue #${{ github.event.issue.number }}"
+          mycoder --githubMode true "Implement a PR for GitHub issue #${{ github.event.issue.number }}. The issue can be found at ${{ github.event.issue.html_url }}. Please review the issue details and implement a solution according to the requirements. After implementation, create a pull request that addresses this issue."
+
+      - name: Run MyCoder Plan command
+        if: contains(github.event.comment.body, '/mycoder plan')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          XAI_API_KEY: ${{ secrets.XAI_API_KEY }}
+          MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
+        run: |
+          echo "Running MyCoder to create implementation plan for issue #${{ github.event.issue.number }}"
+          mycoder --githubMode true "Review GitHub issue #${{ github.event.issue.number }} at ${{ github.event.issue.html_url }} and create an implementation plan. Post your plan as a comment on the issue. Be thorough and consider all requirements mentioned in the issue description."

README.md

@@ -38,6 +38,15 @@ mycoder -f prompt.txt
 mycoder config set githubMode true
 ```
 
+### GitHub Comment Commands
+
+MyCoder can be triggered directly from GitHub issue comments using special commands:
+
+- `/mycoder pr` - Implements a PR for the given issue
+- `/mycoder plan` - Generates an implementation plan as a comment
+
+[Learn more about GitHub comment commands](docs/github-comment-commands.md)
+
 ## Packages
 
 - [mycoder](packages/cli) - Command-line interface for MyCoder

docs/github-comment-commands.md

@@ -0,0 +1,55 @@
+# GitHub Comment Commands
+
+MyCoder provides automated actions in response to specific commands in GitHub issue comments. This feature allows you to trigger MyCoder directly from GitHub issues.
+
+## Available Commands
+
+### `/mycoder pr`
+
+When you add a comment with `/mycoder pr` to any issue, MyCoder will:
+
+1. Check out the repository
+2. Review the issue details
+3. Implement a solution according to the requirements
+4. Create a pull request that addresses the issue
+
+Example:
+```
+This looks like a great feature to add!
+
+/mycoder pr
+```
+
+### `/mycoder plan`
+
+When you add a comment with `/mycoder plan` to any issue, MyCoder will:
+
+1. Review the issue details
+2. Create a comprehensive implementation plan
+3. Post the plan as a comment on the issue
+
+Example:
+```
+I'm not sure about the best approach for this.
+
+/mycoder plan
+```
+
+## How It Works
+
+This functionality is implemented as a GitHub Action that runs whenever a new comment is added to an issue. The action checks for these specific command patterns and triggers MyCoder with the appropriate instructions.
+
+## Requirements
+
+For this feature to work in your repository:
+
+1. The GitHub Action workflow must be present in your repository
+2. You need to configure the necessary API keys as GitHub secrets:
+   - `GITHUB_TOKEN` (automatically provided)
+   - `ANTHROPIC_API_KEY`, `OPENAI_API_KEY`, `XAI_API_KEY`, or `MISTRAL_API_KEY` (depending on your preferred model)
+
+## Limitations
+
+- The action runs with GitHub's default timeout limits
+- Complex implementations may require multiple iterations
+- The AI model's capabilities determine the quality of the implementation or plan