db4d8a9bae
* fix(#4619): execute-phase computes decimal/N-segment phase numbers without breaking shell arithmetic $((10#${PHASE_NUMBER})) is a hard bash/zsh syntax error when PHASE_NUMBER is decimal (01.1, from an inserted phase) or N-segment (23.1.2) — neither is valid shell-arithmetic syntax at all, and the failed expansion aborts the rest of the snippet in a non-interactive shell. safe_resume_gate runs unconditionally before trusting STATE.md or dispatching any executor, so execute-phase failed at its own gate before the first executor on any decimal phase, regardless of workflow.tdd_mode. Regression from #4194. Fixes all 4 sites: safe_resume_gate and the TDD gate in workflows/execute-phase.md, the completion-signal spot-check fallback in workflows/execute-phase/steps/completion-reconciliation.md, and the executor gate validation example in references/tdd.md. Each now zero-strips only the leading integer segment into a *_INT variable (via %%.* / # parameter expansion — always valid shell syntax regardless of what follows) and keeps the remainder as an escaped-dot string for the anchored commit- scope regex, exactly as issue #4619 verified in both bash and zsh. A plain integer phase (12, 01) computes byte-identically to before. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * test(#4619): pin the decimal/N-segment fix and characterize the pre-fix bug Behavioral coverage via real bash execution: the old $((10#01.1)) form throws (characterizes the bug, matching the issue's own reproduction); the new form resolves 01.1 -> 1\.1 and 23.1.2 -> 23\.1\.2, unchanged for plain integers (12 -> 12, 01 -> 1); the resulting anchored ERE matches feat(01.1-03):/test(1.1-3): and correctly rejects feat(01-03):, feat(01.2-03):, feat(011-03):, feat(12-03): for a decimal phase — mirroring issue #4619's own verified table exactly. Updates safe-resume-gate-anchoring.test.cjs's 4 existing source-text assertions (one per site) to the new fixed text. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * chore(#4634): refine the shell-arith drift detector to distinguish safe from unsafe arithmetic With #4619's fix in place, the guard's original "ban $((10#... outright, match any occurrence" was too blunt: it flagged a comment merely mentioning the pattern in prose, the now-safe $((10#$PHASE_INT)) arithmetic on an already-%%.*-stripped integer, and the always-safe plan-id arithmetic (plan ids are plain integers, never decimal). Refines the detector to skip full-line comments and to only flag a captured variable/placeholder name that contains "phase" and does NOT end in _INT/_int — the naming convention the #4619 fix establishes at all four sites for "already reduced to a safe integer." A plan-id variable was never phase-number arithmetic in the first place and is excluded on the same basis. This closes epic #4634's D6 ("lint-phase-id-drift... passes with no new exemptions") and D7 ("a decimal and N-segment phase id survive an end-to-end execute-phase selection without error") for real — the guard now reports zero violations across all five .cts/.md rules. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * chore: regenerate conformance-tier manifests for the new test file Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * test(#4619): cover the plain-padded-integer near-miss matrix too Review found the anchored-ERE near-miss coverage only exercised the decimal case (PHASE_NUMBER=01.1); issue #4619's own worked table also verifies the plain padded-integer case (01 -> PHASE_N=1) against its own near-miss set (matches 01-03, rejects 01.1-03/011-03/12-03). Adds the missing assertion. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#4619): add Fixed changeset Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#4619): correct JS backslash-escaping in safe-resume-gate anchoring test The test's string-literal assertions for the PHASE_FRAC//./\\.} pattern wrote only 2 backslash characters in JS source, which single-quoted-string parsing collapses to 1 real backslash at runtime -- but the workflow/reference files actually contain 2 raw backslash bytes at that position (needed so bash's ${var//pattern/replacement} produces the correct single-backslash output). Write 4 backslash characters in the JS source at all 4 occurrences so the runtime string matches the files' real bytes. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * chore(#4619): refresh the committed compact-content benchmark baseline The new PHASE_INT/PHASE_FRAC arithmetic lines added to gsd-core/workflows/execute-phase.md shifted its committed compaction-ratio baseline. Regenerate via `node scripts/benchmark-compact-content.cjs --write`. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#4619): note the safe_resume_gate arithmetic growth in the test header The emitted-attribution gate flags execute-phase.md growing 91253 -> 91846 bytes (593 bytes). The growth is the fix: the safe_resume_gate and TDD RED block now derive PHASE_INT/PHASE_FRAC before computing PHASE_N, so a decimal/N-segment phase number (e.g. 01.1, 2.3.1) zero-strips its leading integer segment via base-10 arithmetic instead of forcing the whole value through $((10#...)) and hitting a hard shell syntax error on the first dot. A blank line previously separated the Emitted-Drift-Ack-Growth trailer from the Co-Authored-By trailer below it, which splits git's trailer-block detection: only the last contiguous non-blank run of Key: Value lines at the end of a commit message is recognized as trailers, so the growth ack was silently read as ordinary body text and the differential-attribution gate failed with the growth unacknowledged. Joining the two trailers into one contiguous block fixes it. Emitted-Drift-Ack-Growth: execute-phase.md — adds PHASE_INT/PHASE_FRAC derivation to the safe_resume_gate and TDD RED commit-scope grep so a decimal/N-segment phase number zero-strips its leading integer segment via base-10 arithmetic instead of failing on a non-numeric value (#4619) Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * test(#4208): replace chmod-based restore-failure injection with a root-proof git shim `tests/commit-files-deletion.test.cjs`'s two restore-failure tests simulated an unwritable index via a `post-index-change` hook running `chmod a-w` on the git dir. That relies on the OS enforcing the *owner's own* permission bits against itself, which uid 0 (a routine identity inside this repo's Docker-based gsd-test benches) does not: every DAC check short-circuits true for root, so the write the chmod meant to block silently succeeds, the restore comes back clean, and the disclosure/rollback behavior under test never actually gets exercised. This is CLAUDE.md's own named anti-pattern for I/O-failure injection ("Cross-platform test IO-failure injection" — chmod tricks fail under root Docker/CI). It is confirmed as the actual root cause here, not a production defect: `src/commands.cts`'s `restoreRemovedEntries`/rollback-disclosure logic (added by #4253, merged just before this run) was hand-traced and manually reproduced end to end on an unprivileged workstation against a freshly built `gsd-core/bin/lib/commands.cjs`, and it already produces exactly the `staging_failed` + "could not be restored" / "could NOT be restored during rollback" results both tests assert. The other `post-index-change`-based tests in this file (a `sleep` to force a timeout; a real `update-index` to flip a restored entry's mode) are unaffected because neither depends on a permission check — consistent with only the two chmod-based tests failing on the real remote run. Replaces the chmod fixture with a fake `git` placed ahead of the real one on PATH that fails only `update-index --add --cacheinfo` — the one call the restore makes — unconditionally, regardless of privilege level. Every other git invocation execs straight through to the real binary, so the rest of each scenario (`rm --cached`, the restore's own `ls-files` verification, etc.) is exercised exactly as before. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * chore(#4619): backfill changeset pr number to 4644 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#4619): feed the bash fixture script via stdin, not argv, to fix Windows CI Passing the script as a `-c "<script>"` argv element made it subject to Windows' CreateProcess command-line argument encoding, which silently dropped the escaped-dot backslashes before bash ever saw them (observed on PR #4644's windows-latest CI shard: `1\.1` came back as `1.1`). Feeding the same script via stdin instead removes argv entirely from the transport, so there is nothing for Windows to re-encode. POSIX behavior is unchanged. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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.