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* test(#1880): prove corrupt config is indistinguishable from absent Failing-first. Encodes the issue's runtime repro: a trailing comma in .planning/config.json currently yields source:builtin-defaults with degraded:false - byte-identical to the file not existing - and the user's entire configuration is silently discarded. Asserts on the typed surface (CONFIG_REASON, _warnedUnusableConfig) rather than diagnostic prose, per the ADR-1411 amendment's test-methodology clause and CONTRIBUTING.md's raw-text-matching rule. IO failure is injected by monkeypatching fs.readFileSync and restoring in t.after(), never chmod 0o000 (root bypasses mode bits). Refs #1879 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(#1880): distinguish a corrupt config from an absent one loadConfigResolved wrapped the read, the JSON.parse and the entire config build in one try with one catch, so ENOENT, EACCES and SyntaxError all fell through to the same defaults and the branches returned degraded:false - actively asserting health over discarded configuration. A single trailing comma in .planning/config.json silently replaced the user's whole config, reporting source:builtin-defaults degraded:false, byte-identical to having no config file at all. ConfigResolution now carries a machine-readable reason. Genuine absence keeps degraded:false / not_configured; a file that exists but cannot be used sets degraded:true with config_unparseable or config_unreadable. The same split applies to the root config and to ~/.gsd/defaults.json. Control flow is deliberately unchanged. preflight_check reports cyclomatic 141 / cognitive 196 and 93 dependents on this function, with the guidance that small edits beat one big one, so faults are CAPTURED at the existing read sites and stamped onto the returns rather than the try/catch being restructured. Also carries the ADR-1411 amendment's wiring clause: loadConfig returns .config alone to ~51 call sites and would never see the new field, so an unusable file emits a deduplicated stderr diagnostic keyed on resolved path plus errno. Without it the reason would be an unreachable field and the user whose config was discarded would still get no signal - the actual defect. Registers the config-loader seam in lint-resolution-provenance, which until now guarded only agent-skills. Caller audit: ConfigResolution.degraded has exactly one consumer outside this module, cmdAgentSkills (src/init.cts:2259), which destructures {config, source, degraded} - adding a field does not break it. Its --json IR now reports degraded:true for a corrupt config, which is the intended fix and the one observable behavior change. Closes #1880 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(#1880): degrade when any config on the path is unusable, not just the last Two defects found by isolated adversarial review of the first cut. BLOCKER: the success-path return did not consult configFault. A corrupt ROOT config whose workstream override happened to parse returned degraded:false / reason:resolved - the root's settings silently dropped, which is the exact failure this issue closes, reappearing for any project using workstreams. The stderr diagnostic fired, so the out-of-band half worked while the in-band half reported a clean resolve; a --json consumer saw health. MAJOR: reason was derived from Object.keys(parsed) - the root+workstream MERGE - so an empty workstream file inheriting a non-empty root reported resolved despite carrying no settings. Emptiness is now judged on the file actually read, snapshotted before normalizeLegacyKeys mutates it. Also: corrects the ConfigResolution JSDoc, which still described the pre-#1880 degraded contract; adds a fast-check property asserting a PRESENT file is never reported not_configured whatever its bytes (CONTRIBUTING.md parser rule); and asserts the literal enum values so the provenance lint's configured_empty/not_configured markers check real assertions rather than incidental prose in test titles. Refs #1879 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * fix(#1880): reject valid JSON that is not a config object at the read seam The fast-check property added in the previous commit failed on both node lanes: a config.json containing 0, "str", [], null or true is valid JSON, so it parsed "ok", then threw downstream in normalizeLegacyKeys, and the outer catch reported not_configured - a PRESENT file reported as absent, which is precisely the collapse this issue exists to close. The property asserts a present file is never not_configured, and it caught it. _readConfigFile now validates shape, not just parseability (ADR-227: check the semantic shape at a trust boundary, not merely the type). A non-object JSON document is an unusable config, reported config_unparseable. Adds named regression cases for each non-object form alongside the property, so the class is documented and not only randomly sampled. Refs #1879 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * chore(#1880): backfill changeset pr number (pr:0 -> 2688) Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> * test(#2452): record a fetch-time shallow failure instead of crashing This guard failed CI on ubuntu-24 while passing on ubuntu-22 and windows-24 for the same commit, and passed on other PRs. Not a flake and not caused by the change under test - a real fragility in the test. runnerDiff ran the base fetch OUTSIDE its try and only guarded the diff, so it assumed the failure mode is always 'fetch succeeds, diff reports no merge base'. At a shallow boundary that lands short of the merge base, git can instead fail during the FETCH ('unable to parse commit' - the boundary commit's parent is not available). Which stage git fails at is version and transport dependent, so on some runners the error escaped runnerDiff and crashed the test rather than being recorded as the ok:false the assertions expect. Both stages mean the same thing for what this guard protects: a shallow base ref cannot resolve the three-dot diff. Also drops two assert.match calls against git's stderr prose. 'no merge base' and 'unable to parse commit' are the same condition reported at different stages, and CONTRIBUTING prohibits raw text matching on subprocess output. The typed outcome (ok === false) is the contract; the tests now assert that plus the presence of a cause. Found while investigating the red lane on #2688; fixed here per the no-defer rule rather than filed. Refs #1879 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
GSD Core
Git. Ship. Done.
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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.