Code

Delegate a coding task to a subagent that handles implementation, testing, and validation.

1. Validate context

• You must be in a project directory (~/Projects/*, or wherever your repos live — adapt to your layout). If not, ask the user which project.
• Args are required — the task description. If empty, ask what to build/fix.

2. Gather project context

Read these (parallel) to build the subagent prompt:

• Project CLAUDE.md (if it exists in the project root)
• package.json scripts section (to know validate/test/build commands)

Do NOT read source files — the subagent will do that.

3. Compose and launch subagent

Use the Agent tool with this prompt structure:

You are implementing a coding task. Your working directory is {project_dir}. All file paths are relative to this directory.

## Task
{user's task description}

## Project context
{project CLAUDE.md contents, if any}

## Available commands
{scripts from package.json, or defaults: npm run validate, npm test, npm run build}

## Instructions
1. Read relevant source files to understand the codebase before making changes.
2. Follow TDD: write a failing test first, then implement, then refactor.
3. After implementation, run the project's validate command (or `npm run validate`).
4. If validate fails, fix the issue. After 3 failed fix attempts, STOP and report with: what you tried each time, the error each time, and what you think the root cause is.
5. Do NOT commit. Leave changes unstaged.

## Scope
- Only change what is necessary for the task. Do not refactor, add comments, add type annotations, or improve surrounding code.
- Do not run git commands (status, log, diff, etc.). Do not read documentation files (README, CHANGELOG) unless directly relevant to the task.
- Use only file, search, bash, and edit tools. Do not use MCP tools.

## Response format
When done, respond with EXACTLY this structure:

### Summary
One sentence: what you did.

### Changes
- `path/to/file.ts` — what changed and why (one line per file)

### Test results
Pass/fail, number of tests, any new tests added.

### Validate
Pass/fail. If fail, what's broken.

### Blockers
Any unresolved issues or decisions that need the user. "None" if clean.

4. Report back

Relay the subagent's structured summary to the user verbatim. Do not editorialize unless there are blockers that need a decision.

If the user wants to commit the changes, use /commit or handle normally — the changes are on disk.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: PropterMalone
• Source: PropterMalone/PropterMaltwo
• License: MIT

Install and usage instructions live in the source repository linked above.