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
Git. Ship. Done.
English · Português · 简体中文 · 日本語 · 한국어
A light-weight meta-prompting, context engineering, and spec-driven development system for Claude Code, OpenCode, Antigravity CLI, Kimi CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more.
What is GSD Core
GSD Core is a context-engineering and spec-driven development framework that drives AI coding agents (Claude Code, Codex, Antigravity CLI, Kimi CLI, Copilot, Cursor, and more) through a disciplined phase loop. It solves context rot — the quality degradation that accumulates as an AI fills its context window — by running all heavy research, planning, and execution work in fresh-context subagents while keeping your main session lean.
How it works
Each milestone repeats the same five-step loop, one phase at a time:
- Discuss — capture implementation decisions before anything is planned
- Plan — research, decompose, and verify the plan fits a fresh context window
- Execute — run plans in parallel waves; each executor starts with a clean 200k-token context
- Verify — walk through what was built; diagnose and fix before declaring done
- Ship — create the PR, archive the phase, repeat for the next one
Quickstart
npx @opengsd/gsd-core@latest
The installer prompts for your runtime (Claude Code, OpenCode, Antigravity CLI, Kimi CLI, Kilo, Codex, Copilot, Cursor, Windsurf, and more) and whether to install globally or locally. The installer is required for cross-runtime compatibility — do not copy files from agents/ or commands/ directly.
On another runtime or without Node.js? See Install on your runtime.
Once installed, start a new project or onboard an existing repo:
/gsd-new-project # greenfield project
/gsd-onboard # existing codebase
New here? Follow Your first project for a guided walkthrough from install to first shipped phase, or Onboarding an existing codebase for brownfield setup.
Documentation
What's new in 1.7.0 → docs/whats-new-1.7.0.md
Tutorials — learning by doing:
How-to guides — task-focused recipes:
Reference — authoritative facts:
Explanation — concepts and design decisions:
Full index: docs/README.md. Other languages: 日本語 · 한국어 · Português · 简体中文.
Why it works
Most AI-coding setups fail at scale because context bloat silently degrades output quality, there is no shared memory between sessions, and nothing verifies that code actually works. GSD Core solves all three: heavy work runs in fresh subagents, structured artifacts like STATE.md and CONTEXT.md survive session boundaries, and the verify step walks through what was built and generates fix plans before a phase is declared done. See docs/explanation/context-engineering.md for the full reasoning.
Troubleshooting? See docs/how-to/recover-and-troubleshoot.md.
Community
| Project | Platform |
|---|---|
| gsd-opencode | Original OpenCode port |
| Discord | Community support |
Star History
License
MIT License. See LICENSE for details.
Claude Code is powerful. GSD Core makes it reliable.