gsd-pi

Orchestrate GSD (Git Ship Done) projects programmatically via headless CLI. Use when an agent needs to create milestones from specs, execute dev workflows, monitor progress, check status, or control execution (pause/stop/skip/steer). Triggers on "run gsd", "create milestone", "execute project", "check gsd status", "orchestrate development", "run headless workflow", or building orchestrators that coordinate multiple GSD workers.

Build software products autonomously via GSD headless mode. Handles the full lifecycle: write a spec, launch a build, poll for completion, handle blockers, track costs, and verify the result. Use when asked to "build something", "create a project", "run gsd", "check build status", or any task that requires autonomous software development via subprocess.

Expert guidance for creating, writing, building, and refining GSD skills. Use when working with SKILL.md files, authoring new skills, improving existing skills, or understanding skill structure and best practices.

Package findings from a completed spike into a durable project-local skill that auto-loads on future similar work. Reads the latest `.gsd/workflows/spikes/` dir, interviews the user on what's reusable, then writes `.agents/skills/<name>/SKILL.md`. Use when asked to "wrap up the spike", "package this as a skill", "make this reusable", "turn findings into a skill", or at the synthesize phase of `/gsd start spike`.

Deep analysis debugging mode for complex issues. Activates methodical investigation protocol with evidence gathering, hypothesis testing, and rigorous verification. Use when standard troubleshooting fails or when issues require systematic root cause analysis.

Break a plan or milestone brief into independently-grabbable vertical slices (tracer bullets), written to `M###-ROADMAP.md` by default (GitHub issues only on explicit confirmation). Prefers many thin slices over few thick ones and marks dependency order. Use when asked to "break this into slices", "decompose the plan", "vertical slices", "break into issues", or when a plan needs task-level decomposition.

Post-mortem a failed GSD auto-mode run. Traces symptom to root cause via `.gsd/` activity, journal, metrics, and lock artifacts, producing a filing-ready bug report with file:line refs and a fix suggestion. Use when asked to "forensics", "post-mortem", "why did auto-mode fail", "trace the stuck loop", "debug the crash", after `/gsd forensics`, or when a session ended in an unexpected terminal state. Reads artifacts only — re-runs nothing.

Relentless sequential interview that stress-tests a plan or design until every decision branch is resolved. Use when the user wants to "grill me", "stress-test the plan", "interrogate my design", "resolve the decision tree", or whenever a plan feels hand-wavy, under-specified, or carries hidden coupling that planning phases must surface before execution. Pairs with the discuss phase and blocks execution until alignment is reached.

Synthesize the current conversation into a milestone brief (PRD). Writes to `M###-CONTEXT.md` by default, or files a GitHub issue only with explicit user confirmation. Use when asked to "turn this into a PRD", "draft a milestone brief", "capture this context", "write it up", or when enough has been discussed to commit the plan to paper. Does not interview — it synthesizes what is already known.

Browser automation CLI for AI agents. Use when interacting with websites — navigating pages, filling forms, clicking buttons, taking screenshots, scraping/extracting data, logging in, or testing web apps. Triggers on "open a website", "fill out a form", "take a screenshot", "scrape data from a page", "test this web app", "automate browser actions", or any programmatic web interaction.

Design or review an HTTP/REST/GraphQL API for versioning, pagination, error shapes, idempotency, auth, status codes, cache headers, and breaking-change management. Use when asked to "design an API", "shape the endpoints", "design the schema", "add a new endpoint", "review this API", or when building/modifying a public or internal HTTP surface. HTTP-specific complement to `design-an-interface`.

Deep code optimization audit using parallel specialist agents that hunt performance anti-patterns via pattern-based detection, avoiding anchoring bias. Covers DB queries, memory leaks, algorithmic complexity, concurrency, bundle size, dead code, I/O/network, rendering, caching, and build config. Use when asked to optimize code, find performance issues or bottlenecks, speed up an app, reduce latency, detect code smells, or run a performance/quality audit.

Create, debug, and iterate on GSD extensions (TypeScript modules adding tools, commands, event hooks, custom UI, and providers). Use when asked to build an extension, add a tool the LLM can call, register a slash command, hook into GSD events, create custom TUI components, or modify GSD behavior. Triggers on "create/build extension", "add a tool", "register command", "hook into gsd", "gsd plugin".

Build, iterate, and evaluate Model Context Protocol (MCP) servers that expose external services as tools an LLM can call. Covers schema/tool design, error handling, pagination, MCP Inspector testing, and an eval set. Use when asked to "build an MCP server", "create an MCP tool", "wrap this API as MCP", "expose X to Claude", or when extending GSD with custom tool integrations.

Plan, batch, and verify dependency upgrades safely. Triages outdated packages into risk tiers, upgrades in order (dev/minor/patch first, runtime majors last), verifies each batch, and produces an auditable commit sequence. Use when asked to "upgrade deps", "bump packages", "update node_modules", "fix vulnerabilities", "upgrade React/Node/TypeScript", or after `/gsd start dep-upgrade`.

Prepare a clean cross-session handoff so the next agent can pick up where you left off. Writes a focused `continue.md` in the active slice dir and ensures `STATE.md` + summary artifacts are current. Use when asked to "hand off", "prepare handoff", "pause work", "bookmark this", "I'll come back to this later", before running out of context budget, or ending a long session with unfinished work.

Design-engineering principles for making interfaces feel polished. Use when building UI components or doing visual detail work — animations, hover states, shadows, borders, typography, micro-interactions. Triggers on "make it feel better", "feels off", stagger animations, border radius, optical alignment, font smoothing, tabular numbers, box shadows.

Add agent-first observability — structured logs, health endpoints, failure-state persistence, explicit failure modes — so the next agent can diagnose problems unattended. Use when asked to "add logging", "add observability", "add metrics", "make this observable", or when building/refactoring a subsystem that runs unattended (auto-mode engine, background jobs, servers, watchers).

Threat-model-driven security review of a change, feature, or subsystem. Runs a STRIDE-style pass over the actual code and produces a filing-ready report with severity, exploit scenario, and remediation. Use when asked to "security review", "threat model", "check for vulnerabilities", "audit for security", "secure this", or before shipping changes touching auth, input handling, data access, or external surfaces.

Test-driven development with red-green-refactor loops around vertical slices (tracer bullets), not horizontal layers. Use when asked to "use TDD", "write test-first", "red-green-refactor", "build this with tests", or when a feature has a clear observable contract. The discipline complement to the test/add-tests skills (the mechanics).

Collaborative authoring workflow for proposals, technical specs, decision docs, READMEs, ADRs, and long-form prose that must work for fresh readers. Three stages: gather context, iterate on structure, reader-test for a stranger. Use when asked to "write the docs", "draft a proposal", "write a spec", "write an RFC", "write the README", or when a doc must be understandable without this session's context.

Install and configure the GitHub CLI (gh) for AI agent environments where gh may not be pre-installed and git remotes use local proxies instead of github.com. Provides auto-install script with SHA256 verification and GITHUB_TOKEN auth with anonymous fallback. Use when gh command not found, shutil.which("gh") returns None, need GitHub API access (issues, PRs, releases, workflow runs), or repository operations fail with "failed to determine base repo" error. Documents required -R flag for all gh commands in proxy environments. Includes project management: GitHub Projects V2 (gh project), milestones (REST API), issue stories (lifecycle and templates), and label taxonomy management.

Work with GitHub Actions CI/CD workflows - read live syntax, monitor runs, and debug failures. Use when writing, running, or debugging GitHub Actions workflows.

React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.