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* test(#4590): add no-rendered-text-length-assert ESLint rule Enforces ADR-456's typed-surface mandate for one specific bug shape: a test assertion whose pass/fail depends on the length/substring content of a template literal that interpolates an OS-derived path (os.tmpdir(), os.homedir(), path.join/resolve/..., or a PATH_RETURNING_FNS resolver). Because macOS's default tmpdir prefix is longer than Linux's, such an assertion can pass on one runner and fail on another -- the defect class behind #4421's incident (git show 4e75b836e9), already fixed there by pinning to a typed field per ADR-456 Sec(c) before this rule existed to catch a recurrence. Two repo-wide sweeps against the real tests/ tree narrowed the rule to a sound scope: an initial design that traced call arguments (to approximate the historical incident's cross-file render-function shape) produced false positives on ordinary fs.readFileSync(path.join(...)) + assert.match patterns; a second design that matched any bare direct path-returning call produced 45 false positives on path suffix/prefix/non-emptiness checks. The shipped rule matches only a path-returning expression interpolated into a template literal, directly or via one identifier hop -- disclosed in the rule's own "Known boundaries" as not covering the literal cross-file incident shape, which would require tracing into a callee's body. Phase 1 of epic #4589 (CI test-matrix Linux-primary migration) -- Phase 2's safety argument depends on this class of OS-dependent test assertion being enforced going forward, not merely fixed once. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#4590): address code-review findings on no-rendered-text-length-assert Reletter the "Known boundaries" doc-comment list (a)-(e), fixing a gap left by an earlier edit pass and every stale cross-reference to it. Collapse isDirectPathTaint/isTaintedInterpolation's duplicated TemplateLiteral-walk into one recursive relationship (isTaintedInterpolation now delegates a nested-template-literal case back to isDirectPathTaint instead of re-implementing the .some() traversal) -- behavior unchanged, confirmed by re-running the repo-wide sweep (still zero false positives). Found by the Standards-axis /code-review pass on this PR. 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.