a613caaeef
* test(#2721): failing-first suite for the gsd-regen driver and CONTEXT.md parity Tests precede the implementation per the TDD gate. The driver module does not exist yet, so tests/git-merge-regen-driver.test.cjs fails at require time; the contributor-standards parity assertions fail against next as it stands today, where the standards doc names two CONTEXT.md headings that have never existed. Refs #2721 * feat(#2721): add the gsd-regen merge driver and regen:derived The golden parity manifests and the two size baselines are pure functions of the source tree, so their only correct merge is "recompute" -- something git's ours/theirs interface cannot express. 140 of 143 conflicted-file instances across the open PR queue are these files. The driver deliberately does NOT regenerate. Four probes established that at merge-driver time neither the working tree nor the index reflects the merge: both hold the ours side, a file added by theirs does not exist yet, and MERGE_HEAD is unwritten. Git also invokes the driver once per conflicted path (20 here). A regenerating driver would therefore read the ours-side tree and emit a plausible-but-wrong hash manifest -- worse than a conflict, because a conflict is visible. So it accepts %A, runs zero subprocesses, records the resolved paths, and prints one notice pointing at npm run regen:derived. Staleness stays caught where it already was, by golden-install-parity in CI. Every failure path degrades toward today's behaviour (a normal conflict). install-tree is deliberately excluded per ADR-2719 section 7. Also folded in, per the no-defer rule: workflow-size.cjs claimed .md files have no eol=lf in .gitattributes; git check-attr shows eol: lf, set by .gitattributes line 2 since #1088. Refs #2721 * docs(#2721): document regen:derived and the gsd-regen merge driver Adds the how-to a contributor actually reaches for when the generated parity manifests or size baselines conflict, in both places they would look: the merge-conflict path in CONTRIBUTING.md and the full guide in TESTING-SUITES.md, including what the driver deliberately does not do (it does not clear GitHub's CONFLICTING label, and it does not regenerate mid-merge). Also scopes the new contributor-standards parity assertion to the doc's own CONTEXT.md section. Its first run flagged `## Decision`, `## Consequences` and `## Standards followed`, which the doc attributes to an ADR body and a PR body rather than to CONTEXT.md -- a doc-wide extractor would have demanded CONTEXT.md grow headings that do not belong to it. Refs #2721 * fix(#2721): stop passing %P to the merge driver — shell injection The isolated adversarial review found, and I independently reproduced, local arbitrary command execution. Git does not invoke a merge driver with an argv array. It substitutes %O %A %B %L %P textually into the configured string and runs the whole thing through a shell, and $(...) executes inside POSIX double quotes -- so quoting the placeholder does not neutralise it. %O/%A/%B are git-generated temp names and %L is an integer, but %P is the file's own path, chosen freely by any contributor. A branch renaming a covered fixture to evil$(touch PWNED_SENTINEL).json executed that command on the machine of every maintainer who merged it, and the merge still reported success. Fix removes the input rather than filtering it: %P is no longer registered, so the driver receives no attacker-controlled argument at all. The marker records a count instead of path names. A metacharacter filter would have been a guess about shell grammar; passing nothing is a property. Re-ran the identical exploit against the fixed command: nothing executed, conflict still resolved. Two regressions guard it -- a platform-independent assertion that the registered command carries no %P, and a real merge driven by the actual planInstall output with a $(...) filename. Also from review: CLI dispatch had no coverage at all (CONTRIBUTING's "CLI and command routing" matrix), which is why runInstall/runStatus now take {repoRoot} -- hardcoding REPO_ROOT was what made them untestable. Renamed planResolution to resolveAndRecord since the plan* prefix promised purity it did not have. Reconciled the eleven-vs-twelve generator count across CONTEXT.md, CONTRIBUTING.md and the changeset. Refs #2721 * test(#2721): scope safe.directory for the check-attr helper The 66f4d85a run failed 11 assertions, all in the .gitattributes scoping block, with "fatal: detected dubious ownership in repository at '/work'". The test container checks the repo out at a path its user does not own, so git refuses check-attr outright. Everything else passed (27,185). `check-attr` is a pure read of .gitattributes -- no hooks, no filters -- so the exemption is scoped to that one invocation. It is deliberately NOT applied to the driver's own production `git config` calls, which run in the user's own clone and should keep the protection. Refs #2721 * test(#2721): delete the stale assertion that the driver command carries %P The plex2 run on bdfd0856 left exactly two failures, both this test: it still asserted the pre-fix command string, i.e. the vulnerable behaviour. Deleted rather than relaxed, per RULESET.TESTS.delete-bad-tests -- its useful half is already covered, in both directions, by registeredDriverCommandNeverPassesThePlaceholderForTheFilePath. Refs #2721 * test(#2721): drive the end-to-end merges from the real planInstall output The e2e helper hand-rolled its own driver registration, and still carried %P. That meant the five real-git tests were not exercising the production command string at all -- planInstall could drift and they would keep passing. They now register exactly what a contributor gets from npm run setup:merge-driver. Refs #2721 * chore(#2721): backfill changeset pr number to 2730
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
- 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
- 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
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