gstack/CLAUDE.md

gstack development

Commands

bun install          # install dependencies
bun test             # run free tests (browse + snapshot + skill validation)
bun run test:evals   # run paid evals: LLM judge + E2E (~$4/run)
bun run test:e2e     # run E2E tests only (~$3.85/run)
bun run dev <cmd>    # run CLI in dev mode, e.g. bun run dev goto https://example.com
bun run build        # gen docs + compile binaries
bun run gen:skill-docs  # regenerate SKILL.md files from templates
bun run skill:check  # health dashboard for all skills
bun run dev:skill    # watch mode: auto-regen + validate on change
bun run eval:list    # list all eval runs from ~/.gstack-dev/evals/
bun run eval:compare # compare two eval runs (auto-picks most recent)
bun run eval:summary # aggregate stats across all eval runs

test:evals requires ANTHROPIC_API_KEY. E2E tests stream progress in real-time (tool-by-tool via --output-format stream-json --verbose). Results are persisted to ~/.gstack-dev/evals/ with auto-comparison against the previous run.

Project structure

gstack/
├── browse/          # Headless browser CLI (Playwright)
│   ├── src/         # CLI + server + commands
│   │   ├── commands.ts  # Command registry (single source of truth)
│   │   └── snapshot.ts  # SNAPSHOT_FLAGS metadata array
│   ├── test/        # Integration tests + fixtures
│   └── dist/        # Compiled binary
├── scripts/         # Build + DX tooling
│   ├── gen-skill-docs.ts  # Template → SKILL.md generator
│   ├── skill-check.ts     # Health dashboard
│   └── dev-skill.ts       # Watch mode
├── test/            # Skill validation + eval tests
│   ├── helpers/     # skill-parser.ts, session-runner.ts, llm-judge.ts, eval-store.ts
│   ├── fixtures/    # Ground truth JSON, planted-bug fixtures, eval baselines
│   ├── skill-validation.test.ts  # Tier 1: static validation (free, <1s)
│   ├── gen-skill-docs.test.ts    # Tier 1: generator quality (free, <1s)
│   ├── skill-llm-eval.test.ts   # Tier 3: LLM-as-judge (~$0.15/run)
│   └── skill-e2e.test.ts         # Tier 2: E2E via claude -p (~$3.85/run)
├── ship/            # Ship workflow skill
├── review/          # PR review skill
├── plan-ceo-review/ # /plan-ceo-review skill
├── plan-eng-review/ # /plan-eng-review skill
├── retro/           # Retrospective skill
├── setup            # One-time setup: build binary + symlink skills
├── SKILL.md         # Generated from SKILL.md.tmpl (don't edit directly)
├── SKILL.md.tmpl    # Template: edit this, run gen:skill-docs
└── package.json     # Build scripts for browse

SKILL.md workflow

SKILL.md files are generated from .tmpl templates. To update docs:

1. Edit the .tmpl file (e.g. SKILL.md.tmpl or browse/SKILL.md.tmpl)
2. Run bun run gen:skill-docs (or bun run build which does it automatically)
3. Commit both the .tmpl and generated .md files

To add a new browse command: add it to browse/src/commands.ts and rebuild. To add a snapshot flag: add it to SNAPSHOT_FLAGS in browse/src/snapshot.ts and rebuild.

Writing SKILL templates

SKILL.md.tmpl files are prompt templates read by Claude, not bash scripts. Each bash code block runs in a separate shell — variables do not persist between blocks.

Rules:

• Use natural language for logic and state. Don't use shell variables to pass state between code blocks. Instead, tell Claude what to remember and reference it in prose (e.g., "the base branch detected in Step 0").
• Don't hardcode branch names. Detect main/master/etc dynamically via gh pr view or gh repo view. Use {{BASE_BRANCH_DETECT}} for PR-targeting skills. Use "the base branch" in prose, <base> in code block placeholders.
• Keep bash blocks self-contained. Each code block should work independently. If a block needs context from a previous step, restate it in the prose above.
• Express conditionals as English. Instead of nested if/elif/else in bash, write numbered decision steps: "1. If X, do Y. 2. Otherwise, do Z."

Browser interaction

When you need to interact with a browser (QA, dogfooding, cookie setup), use the /browse skill or run the browse binary directly via $B <command>. NEVER use mcp__claude-in-chrome__* tools — they are slow, unreliable, and not what this project uses.

Deploying to the active skill

The active skill lives at ~/.claude/skills/gstack/. After making changes:

1. Push your branch
2. Fetch and reset in the skill directory: cd ~/.claude/skills/gstack && git fetch origin && git reset --hard origin/main
3. Rebuild: cd ~/.claude/skills/gstack && bun run build

Or copy the binary directly: cp browse/dist/browse ~/.claude/skills/gstack/browse/dist/browse