* feat(#3970): per-task external-tracker content-resolution seam Implements ADR-3646 (Phase 1, #3970): a `<task tracker-id="...">` attribute plus a new optional `taskContentResolver` capability-manifest field let a capability resolve a task's action/verify/acceptance-criteria/read_first/done content from an external issue tracker instead of PLAN.md's inline body. - src/plan-document.cts: parses the `tracker-id` attribute into `PlanTask.trackerId` - src/task-content-resolution.cts: new leaf module — split/find/build/resolve, with a hard-halt (throw) contract on ambiguous/failed/timeout/malformed resolution, never a silent fallback to possibly-stale inline text - src/task-command-router.cts: new `task resolve-content --plan --task-id --raw` CLI verb wiring the module into a real process exit code - gsd-core/bin/lib/capability-validator.cjs: validates the new `taskContentResolver` manifest field (feature-role only, cross-capability trackerPrefix uniqueness) - gsd-core/workflows/execute-plan.md, gsd-core/references/loop-hook-dispatch.md, docs/reference/capability-manifest.md: wire the seam into the per-task loop and document it as a new `execute:task` point outside the existing contribution/step/gate vocabulary (unconditional in autonomous mode) Closes #3970 * fix(#3970): gate checkpoint tasks out of content resolution, close trackerPrefix grammar parity gap, cover path-traversal guard Standards/Spec code-review pass on the task-content-resolution seam (ADR-3646 Phase 1) found three defects: 1. execute-plan.md's task-content-resolution bullet fired on any tracker-id-bearing task with no check that it wasn't type="checkpoint:*", contradicting ADR-3646 Decision 1 (a checkpoint task must never enter resolve-content). plan-document.cts already parses trackerId: null unconditionally for checkpoint tasks; only the workflow prose needed the fix, so the bullet now explicitly excludes checkpoint tasks. 2. task-content-resolution.cts's parseResolverDeclaration accepted any non-empty trackerPrefix with no grammar check, while capability- validator.cjs's KEBAB_RE enforces kebab-case at install time — a Generative Fix Divergence gap. Added the same grammar (as a literal regex, documented as intentionally not shared across the .cts/.cjs build boundary) plus a parity test asserting the two surfaces agree across a valid/invalid trackerPrefix table. 3. task-command-router.cts's routeResolveContent path-traversal guard on --plan had zero test coverage. Added a test exercising a ../../../etc/passwit-shaped path and asserting the USAGE rejection names the offending path. * fix(#3970): sanitize resolver diagnostics and cap resolver timeoutMs Two findings caught by an isolated security-review pass on the task content resolution seam: - ResolverFailedError/ResolverMalformedOutputError embedded raw, unsanitized subprocess stderr/stdout (attacker/model-influenced via the tracker-id argv token) into .message. A hostile or buggy resolver could smuggle a newline plus a forged "Error: " line, or terminal escape sequences, into a diagnostic io.cjs's error() writes verbatim to stderr. Fixed at the constructor (task-content-resolution.cts) via io.cjs's existing formatDiagnosticToken(), so every caller of resolveTaskContent gets a safe .message by construction. - capability-validator.cjs's validateTaskContentResolverFields had no upper bound on taskContentResolver.invoke.timeoutMs, letting a manifest declare an effectively unbounded value and defeat the "bounded subprocess" design intent. Added a 120000ms ceiling specific to this field, without touching the shared isPositiveIntegerMs() helper (still used unbounded by the reviewer lane's timeoutFloorMs and probe timeoutMs). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * fix(#3970): fix gsd-test failures — stale prose allowlist line and stderr-vs-message assertion gsd-test (remote dockerized matrix) came back red with 5 failures on this PR; all five are real defects, fixed here. - tests/no-bare-gsd-tools-command-position.test.cjs: PROSE_ALLOWLIST's execute-plan.md entry pointed at line 415, which ffc190df4's checkpoint-exclusion caveat (added near line 221) shifted down by one line. The actual "validated downstream by gsd-tools uat classify-coverage" descriptive mention now sits at line 416. Updated the allowlist entry's line number to match. - tests/task-command-router-resolve-content.test.cjs: the path-traversal test asserted the outside-project-scope diagnostic against the thrown ExitError's own .message. io.cts's error() (ADR-3889) writes its human-readable message to fd 2 via writeAllSync and then throws a bare `new ExitError(1)` with no message argument — by design, so the exception carries no duplicate text and the thrown ExitError's message defaults to "process exit 1" (cli-exit.cts's ExitError constructor). Root cause was the test, not the source: task-command-router.cjs's outside-project-scope rejection already calls error() correctly and the diagnostic text is genuinely emitted, just on fd 2, not on the exception. Fixed the test to capture fd-2 writes (mirroring tests/estimate-calibrate.test.cjs's runCalibrateExpectError and this same file's own captureStdout for fd 1) and assert against the captured stderr text instead of err.message. This was masked locally because a manual `node -e` sanity check that only inspects the caught exception's .message cannot see what the real node:test run actually failed on. Emitted-Drift-Ack-Growth: execute-plan.md — adds the ADR-3646 task-content-resolution bullet and checkpoint-exclusion caveat to the per-task execute loop; a real behavioral prose addition, not incidental bloat. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * docs(#3970): backfill changeset PR number (pr:0 -> pr:4000) --------- Co-authored-by: sim <sim@local> Co-authored-by: Claude Sonnet 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.