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* test(1278): RED-first descriptor parity + fail-closed guards + CHK-07 byte-stability (wave 1) - CHK-03 (RED): extend PROB-14 parity in prohibition-probe.schema.test.cjs to carry the flat check_kind/check_target/check_rule scalars through project->write->parseMustHavesBlock; the non-droppable check_kind-presence assertion is the load-bearing RED trigger (fails because projectProhibitions strips check_* on the current build). - CHK-07 (GREEN forward-guard): probe-core.test.cjs pins descriptor-less byte-stability + dispositionForProhibition fail-closed policy, with a t.todo marker forward-locking plan 01-02. - CHK-06 (RED): prohibition-enforcement.test.cjs asserts descriptorFromProjection export + fail-closed on absent/partial/unknown descriptors via the projection adapter (RED until 01-03). - No src/*.cts or .cjs edits; no new test files; lint-test-file-count clean. * feat(1278): add optional flat-scalar check descriptor fields to Prohibition interface (wave 2) - check_kind?/check_target?/check_rule? mirror CheckDescriptor.kind/target/rule (minus caller-attested failFirst, #1279) - optional so existing Prohibition consumers compile unchanged * feat(1278): project check descriptor as flat scalars in projectProhibitions (wave 2) - emit check_kind/check_target (+ check_rule only for lint-rule with a rule) when descriptor well-formed - under-specified/descriptor-less items project byte-identically (CHK-07); flat scalars ride existing parseMustHavesBlock continuation-KV path (no parser rewrite) - add CHK-02 probe-core unit cases pinning the projection - turns CHK-03 parity test GREEN; dispositionForProhibition untouched * feat(1278): descriptorFromProjection read-back adapter feeds fail-closed locate (wave 3) - Add descriptorFromProjection(projected) -> CheckDescriptor | null to src/prohibition-enforcement.cts: renames the projected flat scalars check_kind/check_target/check_rule -> {kind,target,rule?}, or null when the descriptor is absent/non-object (no check_kind key). - failFirst is NEVER sourced from the projection (stays caller-attested; #1279). - rule is set only when check_rule is a non-empty string; the adapter does NOT re-validate kind/target/rule — an under-specified descriptor reconstructs to one the EXISTING runProhibitionEnforcement LOCATE guard rejects (located:false, never green). The merged #1259 guard stays the single source of fail-closed truth. - Turns the RED CHK-06 fail-closed tests (plan 01-01) GREEN end-to-end; CHK-03 / CHK-07 stay green. CheckDescriptor type, locate guard, dispositionForProhibition, and parseMustHavesBlock are unchanged (additive +36/-0). * feat(1278): verify-phase locates prohibition check from projected descriptor (wave 3) - request.check kind/target/rule sourced from projected check_kind/check_target/check_rule via descriptorFromProjection, not verifier invention (CHK-05) - replaces the #1278 author-supplied / tracked-follow-up note with the delivered deterministic-locate behavior - preserves fail-closed routing: absent/partial descriptor -> never green, hard-gate in both modes - failFirst stays a verify-time caller attestation; #1279 bounds the remaining fail-first proof * feat(1278): spec-phase captures wired-check descriptor on test-tier resolution (wave 3) - Step 5.6 'Keep it' / verification: test path captures check_kind/check_target/check_rule, projected onto must_haves.prohibitions for verify-phase deterministic locate (CHK-04) - SOFT capture: a test-tier prohibition without a descriptor is still allowed (no hard authoring block); stays fail-closed/flagged downstream - --auto captures only an unambiguous descriptor, never fabricates a check path - failFirst NOT captured at spec-phase (verify-time attestation; #1279) - PROB-06 soft-gate + text-mode (PROB-09) behavior unchanged * chore(1278): re-baseline workflow size for grown verify-phase + spec-phase prose (wave 3) - spec-phase.md 28438 -> 30343 (+1905), verify-phase.md 35362 -> 36498 (+1136) - regenerated via npm run size:baseline (no hand-picked numbers); growth is the #1278 deterministic-locate + descriptor-capture prose - workflow-size-budget guard green (122/122) * docs(1278): ratify optional check descriptor in dated ADR-550 addendum + type:Changed changeset - Append dated 2026-06-15 ADR-550 addendum ratifying the D3 prohibition-item shape extension (optional flat-scalar check_kind/check_target/check_rule) - Document flat-scalar rationale, deterministic projection/read-back, fail-closed on partial/invalid/absent, #1279/policy out-of-scope - Add .changeset/1278-prohibition-check-descriptor.md (type: Changed) * docs(1278): document optional check descriptor in prohibition-probe reference + FEATURES - Add 'Optional wired-check descriptor (deterministic locate, #1278)' section to the prohibition-probe reference (flat-scalar keys, projection/read-back, fail-closed + backward-compat, failFirst stays attested) - Add deterministic prohibition-check descriptor source entry to FEATURES.md - No CONTEXT.md glossary change: descriptor reuses existing wired-check / verification:test vocabulary, no new glossary term introduced * fix(1278): pass packaging gates — changeset pr field + retired slash-form fix - Add required pr: 1278 to changeset (lint:changeset MISSING_PR hard requirement; plan's 'omit if unknown' was inaccurate — issue number per #1259 convention, updated to real PR number when opened) [Rule 3 - blocking] - Fix retired /gsd-spec-phase -> /gsd:spec-phase at verify-phase.md:83 (wave-3 prose; caught by slash-namespace invariant #3443/bug-2543, blocked CHK-09 full-suite-green) [Rule 1 - bug] - size:baseline + INVENTORY manifest verified in-sync post-build (no diff) * docs(1278): add check descriptor + descriptorFromProjection to CONTEXT.md prohibition glossary * fix(1278): harden descriptorFromProjection round-trip (numeric-coercion + stray-rule) per review - MD-01/LW-01: narrow projected scalars to primitives + String()-coerce, so a numeric-looking check_target (parseMustHavesBlock coerces ^\d+$ to number) reconstructs as a string and locates instead of silently un-locating; no as-string type-lie, satisfies no-base-to-string. - LW-02: attach rule only for the lint-rule kind (drop a stray node-test rule). - LW-03: document the optional check_* keys in the reference Output schema. RED->GREEN tests added in prohibition-enforcement.test.cjs. * chore(1278): set changeset pr to 1301 * test(1278): add fast-check property for the check-descriptor round-trip + fail-closed (trek-e review) RULESET.TESTS.property-based-testing: the projectProhibitions -> render -> parseMustHavesBlock -> descriptorFromProjection chain is a bijective/transformation contract. Adds 2 fc properties to tests/probe-core.property.test.cjs (no new file; ratchet stays at 2 for probe-core): - well-formed descriptors survive the round-trip across the full string domain incl. the numeric-coercion case (target/rule reconstruct as strings); - under-specified/invalid descriptors (absent / target-less / rule-less / unknown-kind) are always fail-closed (never green, flagged, unlocated). Stability is asserted at the descriptorFromProjection layer (the raw parse step is intentionally lossy for numeric scalars; the shared parser is unchanged). --------- Co-authored-by: Tom Boucher <trekkie@nomorestars.com>
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
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
- 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
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
- Architecture — system architecture, agent model, and data flow
- 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
- Root README — landing page, quickstart, and documentation overview
- Changelog — release history