npm install -g gsd-pi

Milestone  →  a shippable version (4–10 slices)
  Slice    →  one demoable vertical capability (1–7 tasks)
    Task   →  one context-window-sized unit of work

project/
├── .gsd/
│   ├── STATE.md          # current auto-mode position
│   ├── DECISIONS.md      # architecture decisions register
│   ├── LOCK              # crash recovery lock file
│   ├── milestones/
│   │   └── M1/
│   │       ├── slices/
│   │       │   └── S1/
│   │       │       ├── PLAN.md        # task breakdown with must-haves
│   │       │       ├── RESEARCH.md    # codebase/doc scouting output
│   │       │       ├── SUMMARY.md     # completion summary
│   │       │       └── tasks/
│   │       │           └── T1/
│   │       │               ├── PLAN.md
│   │       │               └── SUMMARY.md
│   └── costs/
│       └── ledger.json   # per-unit token/cost tracking
├── ROADMAP.md            # milestone/slice structure
└── PROJECT.md            # project description and goals

/gsd auto
# or with options:
/gsd auto --budget 5.00        # pause if cost exceeds $5
/gsd auto --milestone M1       # run only milestone 1
/gsd auto --dry-run            # show dispatch plan without executing

/gsd init

/gsd status

Milestone 1: Auth System  [3/5 slices complete]
  ✓ S1: User model + migrations
  ✓ S2: Password auth endpoints
  ✓ S3: JWT session management
  → S4: OAuth integration  [PLANNING]
    S5: Role-based access control

Cost: $1.84 / $5.00 budget
Tokens: 142k input, 38k output

/gsd run --slice M1/S4            # run research + plan + execute for a slice
/gsd run --task M1/S4/T2          # run a single task
/gsd run --phase research M1/S4   # run just the research phase
/gsd run --phase plan M1/S4       # run just the planning phase

/gsd migrate                        # migrate current directory
/gsd migrate ~/projects/old-project # migrate specific path

/gsd costs
/gsd costs --by-phase
/gsd costs --by-slice
/gsd costs --export costs.csv

# My Project Roadmap

## Milestone 1: Core API

### S1: Database schema and migrations
Set up Postgres schema for users, posts, and comments.

### S2: REST endpoints
CRUD endpoints for all resources with validation.

### S3: Authentication
JWT-based auth with refresh tokens.

## Milestone 2: Frontend

### S1: React app scaffold
...

# My Project

A REST API for a blogging platform built with Express + TypeScript + Postgres.

## Tech Stack
- Node.js 20, TypeScript 5
- Express 4
- PostgreSQL 15 via pg + kysely
- Jest for tests

## Conventions
- All endpoints return `{ data, error }` envelope
- Database migrations in `db/migrations/`
- Feature modules in `src/features/<name>/`

/gsd init

/gsd auto

Research → Plan → Execute (per task) → Complete → Reassess → Next Slice

## Must-Haves

- [ ] `npm test -- --testPathPattern=auth` passes with 0 failures
- [ ] File `src/features/auth/jwt.ts` exists and exports `signToken`, `verifyToken`
- [ ] `curl -X POST http://localhost:3000/auth/login` returns 200 with `{ data: { token } }`
- [ ] No TypeScript errors: `npx tsc --noEmit` exits 0

main
 └── milestone/M1          ← worktree branch created at start
      ├── commit: [M1/S1/T1] implement user model
      ├── commit: [M1/S1/T2] add migrations
      ├── commit: [M1/S1] slice complete
      ├── commit: [M1/S2/T1] POST /users endpoint
      └── ...
 
 After milestone complete:
main ← squash merge of milestone/M1 as "[M1] Auth system"

# Next run detects the lock and auto-recovers:
/gsd auto

# Output:
# ⚠ Lock file found: M1/S3/T2 was interrupted
# Synthesizing recovery briefing from session artifacts...
# Resuming with full context

/gsd auto --budget 10.00

{
  "units": [
    {
      "id": "M1/S1/research",
      "model": "claude-opus-4",
      "inputTokens": 12400,
      "outputTokens": 3200,
      "costUsd": 0.21,
      "completedAt": "2025-01-15T10:23:44Z"
    }
  ],
  "totalCostUsd": 1.84,
  "budgetUsd": 10.00
}

# Decisions Register

## D1: Use kysely not prisma
**Date:** 2025-01-14
**Reason:** Better TypeScript inference, no code generation step needed.
**Impact:** All DB queries use kysely QueryBuilder syntax.

## D2: JWT in httpOnly cookie, not Authorization header
**Date:** 2025-01-14  
**Reason:** Better XSS protection for the web client.
**Impact:** Auth middleware reads `req.cookies.token`.

✗ Stuck on M1/S3/T1 after 2 attempts
Expected: src/features/auth/jwt.ts (not found)
Last session: .gsd/sessions/M1-S3-T1-attempt2.log
Run `/gsd run --task M1/S3/T1` to retry manually

# Project Skills

- name: postgres-kysely
- name: express-typescript  
- name: jest-testing

{
  "timeouts": {
    "softMinutes": 8,
    "idleMinutes": 3,
    "hardMinutes": 15
  },
  "defaultModel": "claude-opus-4",
  "researchModel": "claude-sonnet-4"
}

import { GSDProject, AutoRunner } from 'gsd-pi';

const project = await GSDProject.load('/path/to/project');

// Check current state
const state = await project.getState();
console.log(state.currentMilestone, state.currentSlice);

// Run a single slice programmatically
const runner = new AutoRunner(project, {
  budget: 5.00,
  onUnitComplete: (unit, cost) => {
    console.log(`Completed ${unit.id}, cost: $${cost.toFixed(3)}`);
  },
  onStuck: (unit, attempts) => {
    console.error(`Stuck on ${unit.id} after ${attempts} attempts`);
    process.exit(1);
  }
});

await runner.runSlice('M1/S4');

// .gsd/hooks.ts
import type { DispatchHook } from 'gsd-pi';

export const beforeTaskDispatch: DispatchHook = async (ctx) => {
  // Append custom context to every task dispatch
  return {
    ...ctx,
    extraContext: `
## Live API Docs
${await fetchInternalAPIDocs()}
    `
  };
};

{
  "hooks": "./hooks.ts"
}

git diff ROADMAP.md

{
  "reassessment": false
}

rm .gsd/LOCK
/gsd auto

git worktree list          # see active worktrees
git worktree remove .gsd/worktrees/M1 --force
/gsd auto                  # recreates cleanly

/gsd cleanup --sessions --older-than 7d