5039d49924
The scoped Windows lane reached exactly 15m05s and was cancelled on four consecutive shas of PR #3094. A job that exceeds timeout-minutes reports as CANCELLED rather than FAILURE, which is why it first read as infrastructure noise; the giveaway is that the duration equals the cap. The Required tests rollup fans that job in, so it red-blocked merge while every other lane — including all three sharded full-Windows shards — was green. The trigger was a change to the shared test helper, which scopes the install-heavy suites into the selected list. The lane normally runs about eight minutes; with that list it does not fit. It was the only unsharded lane left in this job, so it was the only one without headroom to absorb a large scoped list. Issue #869 hit this exact cliff on the sibling lane and named the durable answer in its own follow-up: a timeout bump moves the cliff, sharding removes it. #2952 then sharded the full lane. This finishes that work. The runner already supports it — the shard partition is applied after scope selection, so it composes with a selected file list rather than only with a suite, and the partition is cost-weighted from the measured timings table. The job name template already renders a shard suffix when one is present, so the three entries name themselves. No individual matrix job is a required status check; the rollup is, and it is name-independent, so renaming these jobs does not touch branch protection. timeout-minutes stays at 15. Each shard now does roughly a third of the work, so the cap goes from binding to backstop without being raised. The lane-shape tests were generalized rather than relaxed: the complete-shard-set invariant now runs per sharded scope instead of only over the full lane, and "only the full lane is sharded" became "targeted is the only unsharded lane". A new assertion pins the shard through to the runner — without it the three shards would each run the entire selected list, triple the cost and no speedup, and every check would stay green. No LANE_COSTS entry is added for the new shards. The only recorded cost for that lane is the pre-sharding run that hit the cap, and inventing a post-sharding number would be exactly the kind of unmeasured claim the rest of that table avoids. The estimate and the reason are written down instead, to be replaced by a real measurement. Refs #3057 Co-Authored-By: Claude Opus 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.