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* test(#3072): add failing-first coverage for the mcp served catalog 55 input-class rows from the phase test matrix, across four suites: the catalog module over injected readFile/readDir seams, the protocol surface through handleMessage, the install-vs-catalog parity gate, and fast-check properties for uri round-trip, traversal refusal, and pagination partition. src/mcp-catalog.cts lands as a skeleton whose functions throw, so the suites fail on BEHAVIOR rather than on a missing module. The REASON enum is real so tests assert typed codes instead of message prose. Hostile coverage for the one client-controlled path surface (resources/read): dot-dot and backslash traversal, percent- and double-encoded traversal, absolute posix and windows paths, file:// scheme, null byte, symlink escape, unindexed sibling, non-string and empty uri, wrong root segment. IO faults are injected by monkeypatching the seam, never chmod 0o000 - root bypasses mode bits, so a permission-based test silently passes with zero coverage in root CI. Refs #3072 * feat(#3072): serve the mcp catalog as resources and prompts gsd-mcp-server now serves GSD's own content alongside its three tools: the workflow, reference and command tree as MCP resources (resources/list, cursor paginated, and resources/read over gsd://<segment>/<relpath> uris) and the 71 commands/gsd/*.md as MCP prompts keyed by bare command name. initialize advertises resources and prompts, and deliberately does not advertise subscribe or listChanged - the catalog is fixed for a server process lifetime, so declaring a notification we never send would be a lie a host acts on. Composition scope is SHARED, not re-declared. shouldCompose lives in src/mcp-catalog.cts and bin/install.js now imports it instead of carrying its own regex, so the served catalog and the installed file floor cannot drift on what gets composed. Proven behavior-preserving across all 2871 tracked paths plus windows-backslash, absolute and near-miss-prefix cases: zero mismatches. tests/mcp-catalog-parity.test.cjs asserts served text equals the installer composition-stage text over the real tree, with anti-vacuity guards requiring both a marker-bearing workflow and a non-composed file in the comparison set. Two measurements corrected the literal issue text. Composition is scoped to gsd-core/workflows/ only, because a reference or command that documents marker syntax with an unfenced example would otherwise be parsed as carrying a real marker and have that line lossily dropped. And parity is asserted at the composition stage rather than against an emitted runtime tree, since install applies per-runtime path rewrites afterwards and the catalog is host-agnostic, so byte equality with any one runtime would be false by construction. resources/read is the one client-controlled path surface and is guarded in two independent layers: the uri must be an exact key in the prebuilt index, which defeats every traversal string by construction, and the mapped path is then re-checked with validatePath so a symlink planted inside a root after indexing is still refused. Also fixes a real drift defect found while here: SERVER_VERSION was hardcoded 1.7.0 while the package is at 1.9.1. It now resolves lazily from VERSION or package.json, reusing the precedent in runtime-artifact-conversion. Closes #3072 * test(#3072): make the catalog parity gate drive the real installer Review found the parity gate vacuous: it never imported or spawned bin/install.js, and recomputed the installer side with the SAME shouldCompose and composeWorkflow the catalog calls internally. It therefore proved only that src/mcp-catalog.cts is self-consistent. The old row 52 compared shouldCompose against a regex literal frozen in the test file rather than against the installer at all. An inline divergent regex re-added to bin/install.js - the exact regression ADR-1671 asks this gate to catch - would have left the suite green. The gate now spawns a real bin/install.js and compares the composition DECISION, observed as gsd:section marker survival, against what the catalog serves for the same files. Marker presence is the right observable because the installer applies per-runtime path rewrites after composing while the catalog applies none, so raw byte equality between the two surfaces is false by construction and must not be asserted. Sensitivity was proven, not assumed: overlaying the shouldCompose export that bin/install.js imports so it always returns false makes a real spawned install leave autonomous.md's markers in place while the catalog still strips them, and the row 48 assertion diverges. Anti-vacuity guards are kept and extended - the comparison set must be non-empty, must contain a workflow that actually carries markers, must contain a file the predicate declines to compose, and the install must have emitted a non-zero file count. The marker-documenting reference case has no instance in the real tree, so it uses an overlay fixture built with the same technique workflow-fragments-emission.install.test.cjs already uses. Renamed to .install.test.cjs so it lands in the install suite it now belongs to. Refs #3072 * test(#3072): retarget the unknown-method assertion off a now-implemented method tests/gsd-mcp-server.test.cjs used 'resources/read' as its example of an UNKNOWN JSON-RPC method. The served catalog implements that method, so it now returns -32602 (no uri supplied) rather than -32601. The remote runner caught it deterministically on both linux lanes: -32602 !== -32601. The test's intent is still correct and worth keeping, so it is corrected rather than deleted or weakened. It now uses 'resources/subscribe', which the server deliberately does not implement and deliberately does not advertise in initialize's capabilities, because it never sends the corresponding notification. That turns the assertion into a real contract - the advertised capability surface and the implemented method surface agree - instead of an arbitrary method name a future feature could invalidate the same way. Swept the rest of the suite for other assertions pinning the newly implemented methods; this was the only one. Refs #3072 * chore(#3072): backfill changeset PR number 3083 * test(#3072): make the catalog fake fs separator-agnostic for windows CI caught this on windows-latest (22 and 24): every catalog fixture indexed ZERO entries, surfaced by the anti-vacuity guards as 'fixture catalog must actually index resources for this property to mean anything'. Mechanism: makeFakeFs keyed its dirMap/fileMap on POSIX-joined paths (${root}/${rel}), while production buildCatalog looks paths up with path.join, which is backslash-separated on Windows. Every lookup missed, tryReadDir returned null, and the catalog came back empty. Production is NOT at fault and is unchanged. The same CI run proves it: on windows-latest the real-filesystem tests all passed, including 'installer composition decision matches the served catalog for every file in the real installed tree' and the row-51 non-vacuity proof against a real spawned installer. A real Windows fs accepts both separators; the FAKE did not, so the fake was the unfaithful one and is what changed. Lookup keys are now normalized unconditionally with .replace(/\\/g,'/') in readDir and readFile - never path.sep-conditional, never platform-gated. The row-42/43 injected-fault wrappers got the same treatment, since they compared raw production paths against POSIX-literal fixtures. No assertion was weakened, and the anti-vacuity guards that caught this are untouched - they are the reason this surfaced as a loud failure instead of a suite that silently asserted nothing on Windows. Refs #3072 --------- Co-authored-by: sim <sim@local>
GSD Core documentation
Documentation is organised into four quadrants: tutorials help you learn by doing, how-to guides solve specific tasks, reference states authoritative facts, and explanation explores concepts and design decisions.
Language versions: English · Português (pt-BR) · 日本語 · 简体中文
Tutorials
- Your first project — install to first shipped phase, one guaranteed path
- Onboarding an existing codebase — bring GSD Core to a brownfield repo
- Build your first capability — author a tiny declarative capability and watch it act in the loop
- Install your first capability — install a third-party capability end-to-end: consent, verify, check for updates, remove
How-to guides
- Install on your runtime — runtime-specific install steps for all 16 supported runtimes
- Install a minimal GSD and add skills later — install only the core skills, then grow the surface with profiles and
/gsd-surface - Attach a plugin-provided skill to a GSD agent — use the
global:plugin:skillentry form to load Claude Code plugin skills into agent prompts - Discuss a phase — capture implementation decisions before planning begins
- Resolve edge-coverage findings — turn the spec phase's surfaced domain-boundary edges into covered, dismissed, or backstopped spec decisions
- Resolve prohibition findings — turn the spec phase's surfaced must-NOT constraints into resolved, dismissed, or deferred spec decisions
- Plan a phase — run research, decompose work, and verify plan quality
- Execute a phase — run plans in parallel waves with fresh-context subagents
- Verify and ship — walk through completed work, diagnose failures, and create the PR
- Run phases autonomously — use autonomous mode for unattended phase execution
- Handle quick and fast tasks — use
/gsd-quickand/gsd-fastfor ad-hoc work outside the phase loop - Configure model profiles — switch between quality, balanced, and budget model tiers
- Set up cross-AI review — configure a second AI to review code produced by the primary agent
- Work in parallel with workstreams — run independent lines of work simultaneously using workstreams
- Isolate work with workspaces — use workspaces to sandbox experimental or risky changes
- Debug a failed execution — diagnose and recover from broken or incomplete phase execution
- Spike and sketch — use
/gsd-spikeand/gsd-sketchfor exploratory work before committing to a plan - Design a UI phase — use the UI phase loop for frontend and visual work
- Develop a Capability for GSD 1.5+ — add feature Capabilities, hook fragments, and registry entries
- Ship a reviewer lane in your capability — declare a
reviewerbody so/gsd-reviewdiscovers, invokes, and renders your external review CLI or model endpoint - List your reviewer lane in the registry — publish a lane you have built to the Reviewer Lane Registry so other people can find and install it
- Take over a capability or EoS integration — assume maintainership of an existing third-party capability, reviewer lane, or EoS host integration through a handoff, an adoption fork, first-party absorption, or a de-listing
- Add or update a host's integration — set a host's documentation-sourced
runtime.hostIntegrationaxes (ADR-1239 Phase A), with theundocumentedsentinel rule - Turn a capability off (and keep it off) — disable a capability via the surface, or gate individual hooks off without removing the capability
- Drive GSD from a tracker issue — start a phase from a GitHub, Linear, or Jira issue
- Migrate from GSD 2 — upgrade an existing GSD 2 project to GSD Core
- Update GSD — re-run the installer to pick up the latest release
- Clean up get-shit-done-cc — remove leftover old-package artifacts that cause a spurious
⬆ /gsd-updateindicator after migrating to@opengsd/gsd-core - Fix the worktree base-mismatch (exit 42) error — resolve the branch-divergence condition that halts parallel phase execution
- Recover and troubleshoot — fix common problems, rebuild context, and uninstall
Reference
- Commands — every command with flags and examples
- Configuration — full config schema, model profiles, git branching strategies
- CLI tools —
gsd-tools.cjsprogrammatic API for workflows and agents - Features — complete feature index
- Inventory — installed skills and surface map
- STATE.md schema — field-by-field reference for
.planning/STATE.md - CONTEXT.md schema — field-by-field reference for
.planning/phases/<N>/CONTEXT.md - PLAN.md schema — field-by-field reference for
.planning/phases/<N>/PLAN.md - Planning artifacts — all
.planning/files and their roles - Review and verification capabilities — code review, security, and Nyquist capability ownership and hook contracts
- Gate predicates — canonical specification of the phase-gate predicate vocabulary
- Capability matrix — generated catalogue of every capability's role, tier, extension points, hook kinds, and
engines.gsd - Capability manifest — the full
capability.jsonschema and validation rules gsd capabilitycommand — install / update / remove / list reference for third-party capabilities- Workflow fragments — in-file
<!-- gsd:section -->marker grammar for fragmentizing workflow markdown at emission time - Reviewer Lane Registry — generated catalogue of third-party reviewer lanes, with their flags, transport, and install commands
Explanation
- Context engineering — how context rot forms and how GSD Core prevents it
- The phase loop — design rationale for the Discuss → Plan → Execute → Verify → Ship cycle
- Multi-agent orchestration — how subagents are spawned, scoped, and coordinated
- Security model — trust boundaries, permissions, and safe automation
- The capability trust model — why third-party capabilities are gated by consent + integrity + reversibility, not a sandbox
- How overlay capabilities compose — why first-party always wins and how the loader resolves precedence, conflicts, and fail-open load-failure warnings
- Architecture — system architecture, agent model, and data flow
- The Embeddable Orchestration System — one public, versioned contract for embedding GSD across many hosts
- Discuss modes — assumptions mode vs interview mode for
/gsd-discuss-phase - Context monitoring — context window monitoring hook architecture
- Issue-driven orchestration — recipe for driving GSD from a tracker issue using existing primitives
Related
- What's new in 1.7.0 — curated highlights of the 1.7.0 release
- Root README — landing page, quickstart, and documentation overview
- Changelog — release history