# IMPLEMENT-PLAN

## Purpose

Execute an existing plan (created by `create-plan`) in an isolated git worktree, with iterative cross-model review at each milestone boundary. Milestones are implemented one-by-one with lint/typecheck/test gates, reviewed by a second model/provider, and committed locally until all are approved.

## Requirements

- Plan folder under `ai_plan/` (created by `create-plan`) with:
  - `continuation-runbook.md`
  - `milestone-plan.md`
  - `story-tracker.md`
- Git repo with worktree support
- Superpowers execution skills installed from: https://github.com/obra/superpowers
- Required dependencies:
  - `superpowers:executing-plans`
  - `superpowers:using-git-worktrees`
  - `superpowers:verification-before-completion`
  - `superpowers:finishing-a-development-branch`
- For Codex, native skill discovery must be configured:
  - `~/.agents/skills/superpowers -> ~/.codex/superpowers/skills`
- For Cursor, skills must be installed under `.cursor/skills/` (repo-local) or `~/.cursor/skills/` (global)

If dependencies are missing, stop and return:

"Missing dependency: [specific missing item]. Ensure all prerequisites are met, then retry."

### Reviewer CLI Requirements (Optional)

To use the iterative milestone review feature, one of these CLIs must be installed:

| Reviewer CLI | Install | Verify |
|---|---|---|
| `codex` | `npm install -g @openai/codex` | `codex --version` |
| `claude` | `npm install -g @anthropic-ai/claude-code` | `claude --version` |
| `cursor` | `curl https://cursor.com/install -fsS \| bash` | `cursor-agent --version` (binary: `cursor-agent`; alias `cursor agent` also works) |

The reviewer CLI is independent of which agent is running the implementation — e.g., Claude Code can send milestones to Codex for review, and vice versa.

**Additional dependency for `cursor` reviewer:** `jq` is required to parse Cursor's JSON output. Install via `brew install jq` (macOS) or your package manager. Verify: `jq --version`.

## Install

### Codex

```bash
mkdir -p ~/.codex/skills/implement-plan
cp -R skills/implement-plan/codex/* ~/.codex/skills/implement-plan/
```

### Claude Code

```bash
mkdir -p ~/.claude/skills/implement-plan
cp -R skills/implement-plan/claude-code/* ~/.claude/skills/implement-plan/
```

### OpenCode

```bash
mkdir -p ~/.config/opencode/skills/implement-plan
cp -R skills/implement-plan/opencode/* ~/.config/opencode/skills/implement-plan/
```

### Cursor

Copy into the repo-local `.cursor/skills/` directory (where the Cursor Agent CLI discovers skills):

```bash
mkdir -p .cursor/skills/implement-plan
cp -R skills/implement-plan/cursor/* .cursor/skills/implement-plan/
```

Or install globally (loaded via `~/.cursor/skills/`):

```bash
mkdir -p ~/.cursor/skills/implement-plan
cp -R skills/implement-plan/cursor/* ~/.cursor/skills/implement-plan/
```

## Verify Installation

```bash
test -f ~/.codex/skills/implement-plan/SKILL.md || true
test -f ~/.claude/skills/implement-plan/SKILL.md || true
test -f ~/.config/opencode/skills/implement-plan/SKILL.md || true
test -f .cursor/skills/implement-plan/SKILL.md || test -f ~/.cursor/skills/implement-plan/SKILL.md || true
```

Verify Superpowers execution dependencies exist in your agent skills root:

- Codex: `~/.agents/skills/superpowers/executing-plans/SKILL.md`
- Codex: `~/.agents/skills/superpowers/using-git-worktrees/SKILL.md`
- Codex: `~/.agents/skills/superpowers/verification-before-completion/SKILL.md`
- Codex: `~/.agents/skills/superpowers/finishing-a-development-branch/SKILL.md`
- Claude Code: `~/.claude/skills/superpowers/executing-plans/SKILL.md`
- Claude Code: `~/.claude/skills/superpowers/using-git-worktrees/SKILL.md`
- Claude Code: `~/.claude/skills/superpowers/verification-before-completion/SKILL.md`
- Claude Code: `~/.claude/skills/superpowers/finishing-a-development-branch/SKILL.md`
- OpenCode: `~/.config/opencode/skills/superpowers/executing-plans/SKILL.md`
- OpenCode: `~/.config/opencode/skills/superpowers/using-git-worktrees/SKILL.md`
- OpenCode: `~/.config/opencode/skills/superpowers/verification-before-completion/SKILL.md`
- OpenCode: `~/.config/opencode/skills/superpowers/finishing-a-development-branch/SKILL.md`
- Cursor: `.cursor/skills/superpowers/skills/executing-plans/SKILL.md` or `~/.cursor/skills/superpowers/skills/executing-plans/SKILL.md`
- Cursor: `.cursor/skills/superpowers/skills/using-git-worktrees/SKILL.md` or `~/.cursor/skills/superpowers/skills/using-git-worktrees/SKILL.md`
- Cursor: `.cursor/skills/superpowers/skills/verification-before-completion/SKILL.md` or `~/.cursor/skills/superpowers/skills/verification-before-completion/SKILL.md`
- Cursor: `.cursor/skills/superpowers/skills/finishing-a-development-branch/SKILL.md` or `~/.cursor/skills/superpowers/skills/finishing-a-development-branch/SKILL.md`

## Key Behavior

- Reads existing plan from `ai_plan/YYYY-MM-DD-<short-title>/`.
- Sets up an isolated git worktree with branch `implement/<plan-folder-name>`.
- Executes milestones one-by-one, tracking stories in `story-tracker.md`.
- Runs lint/typecheck/tests as a gate before each milestone review.
- Sends each milestone to a reviewer CLI for approval (max rounds configurable, default 10).
- Commits each milestone locally only after reviewer approval (does not push).
- After all milestones approved, merges worktree branch to parent and deletes worktree.
- Supports resume: detects existing worktree and `in-dev`/`completed` stories.

## Milestone Review Loop

After each milestone is implemented and verified, the skill sends it to a second model for review:

1. **Configure** — user picks a reviewer CLI (`codex`, `claude`, `cursor`) and model, or skips
2. **Submit** — milestone spec, acceptance criteria, git diff, and verification output are written to a temp file and sent to the reviewer in read-only/ask mode
3. **Feedback** — reviewer evaluates correctness, acceptance criteria, code quality, test coverage, security
4. **Revise** — the implementing agent addresses each issue, re-verifies, and re-submits
5. **Repeat** — up to max rounds (default 10) until the reviewer returns `VERDICT: APPROVED`
6. **Approve** — milestone is marked approved in `story-tracker.md`

### Supported Reviewer CLIs

| CLI | Command | Session Resume | Read-Only Mode |
|---|---|---|---|
| `codex` | `codex exec -m <model> -s read-only` | Yes (`codex exec resume <id>`) | `-s read-only` |
| `claude` | `claude -p --model <model> --allowedTools Read` | No (fresh call each round) | `--allowedTools Read` |
| `cursor` | `cursor-agent -p --mode=ask --model <model> --trust --output-format json` | Yes (`--resume <id>`) | `--mode=ask` |

## Variant Hardening Notes

### Claude Code

- Must invoke explicit required sub-skills:
  - `superpowers:executing-plans`
  - `superpowers:using-git-worktrees`
  - `superpowers:verification-before-completion`
  - `superpowers:finishing-a-development-branch`

### Codex

- Must use native skill discovery from `~/.agents/skills/` (no CLI wrappers).
- Must verify Superpowers skills symlink: `~/.agents/skills/superpowers -> ~/.codex/superpowers/skills`
- Must invoke required sub-skills with explicit announcements.
- Must track checklist-driven skills with `update_plan` todos.
- Deprecated CLI commands (`superpowers-codex bootstrap`, `use-skill`) must NOT be used.

### OpenCode

- Must use OpenCode native skill tool (not Claude/Codex invocation syntax).
- Must verify Superpowers skill discovery under:
  - `~/.config/opencode/skills/superpowers`
- Must explicitly load all four execution sub-skills.

### Cursor

- Must use workspace discovery from `.cursor/skills/` (repo-local or `~/.cursor/skills/` global).
- Must announce skill usage explicitly before invocation.
- Must use `--mode=ask` (read-only) and `--trust` when running reviewer non-interactively.
- Must not use `--force` or `--mode=agent` for review (reviewer should never write files).

## Execution Workflow Rules

- Read `continuation-runbook.md` first (source of truth).
- Set up worktree before any implementation work.
- Complete one milestone at a time.
- Update `story-tracker.md` before/after each story.
- Lint/typecheck/test after each milestone (all must pass).
- Send to reviewer for approval before committing.
- Address review feedback, re-verify, re-submit (do not commit between rounds).
- Commit locally (do not push) only after reviewer approves the milestone.
- Move to next milestone only after approval and commit.
- After all milestones: run full test suite, merge worktree branch to parent, delete worktree.
- Max review rounds default to 10 if user does not specify a value.