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* fix(#2526): drop gsd-ui-auditor's uncallable Playwright-MCP block The agent declares `tools: Read, Write, Bash, Grep, Glob, Skill` — no `mcp__*` grant of any kind — while its body presented a `<playwright_mcp_approach>` block as the *preferred* capture path. That branch was unreachable by construction: the availability check had a fixed answer, the three `mcp__playwright__*` calls could never dispatch, and the "when Playwright-MCP is NOT available" fallback was the only branch that ever ran — 39 lines of instruction loaded on every /gsd-ui-review spawn that also invited the model to claim a capture path it could not take. Remove the dead block, leaving the CLI screenshot path as the sole documented approach. Guard the class in tests/mcp-tool-inheritance.test.cjs, which already owns agent MCP-grant parity: the new block generalizes the #1284 researcher check from two agents and one dispatch table to every agents/*.md and its whole body — no agent may document an `mcp__<server>__*` namespace absent from its own `tools:` declaration. Frontmatter is read through the canonical parser (gsd-core/bin/lib/frontmatter.cjs) rather than a hand-rolled scan, so inline CSV, block sequences, flow arrays, quoted scalars and full-line comments are handled by construction; inline comments inside a scalar survive that parser, so they are stripped explicitly. The check is server-level by design, ignores prose metavariables like `mcp__X__*`, matches hyphenated server ids, and carries a discovery guard plus negative controls for every documented boundary so it cannot decay into a vacuous pass. The session-level Playwright-MCP pass in gsd-core/workflows/ui-review.md is deliberately untouched — workflow files carry no fixed allowlist, so their availability check is genuinely runtime-detected and honest. Fixes #2526 * chore(#2526): set changeset fragment pr to 2594 The fragment shipped with the documented `pr: 0` placeholder because the PR number does not exist until the PR is opened, and scripts/changeset/parse.cjs rejects `pr <= 0`. Now that the PR is open, set the real number so changeset-lint passes. * test(#2526): cover the two-char server-id boundary of the metavariable exclusion The length-1 "prose metavariable" exclusion was tested at length=1 and at real ids (>=3 chars), but never at length=2 — the limit+1 boundary where a server id starts being recognized. Review finding on #2594: `mcp__ab__foo` in a body with no grant must flag `['ab']`. * fix(#2526): treat a bare mcp__* grant as covering every server `grantedServers()` stripped `mcp__*` to the empty string and dropped it via `if (server)`, so an allowlist that grants every MCP server read as granting none — and the guard then fired against a body the grant plainly covered. That is the one input shape that inverts the check, turning it against a correct agent rather than merely missing a bad one. A `/^mcp__\*+$/` token now sets a GRANT_ALL sentinel that short-circuits `ungrantedServers()`. The sentinel `*` is outside REFERENCE_RE's character class, so no body reference can collide with it. A bare `mcp__` with no wildcard stays a typo rather than a grant and keeps failing closed. No agent uses the `mcp__*` spelling today, so this was latent rather than live. Two negative controls pin both halves. * fix(#2526): scan the frontmatter description for MCP references too `ungrantedServers()` scanned `stripFrontmatter(content)` only, so an `mcp__foo__bar` reference in the `description` field escaped the check. That field ships with the agent and the dispatcher reads it, which makes a dead reference there exactly as dead as one in the body. Only `description` is added to the scanned surface, never the whole frontmatter: `tools:` is the grant list itself, so scanning it would let every allowlist satisfy itself and turn the guard vacuous. A negative control pins that boundary alongside the new positive case. All 34 per-agent tests still pass with the wider surface, so no live agent verdict changes — this was latent. * test(#2526): give multi-character placeholders a convention the checker knows The metavariable exclusion is `length === 1`, so the natural placeholders `mcp__SRV__*` and `mcp__SERVER__*` were flagged as real references — and the failure message then offered an author two remedies ("grant the namespace or drop the block") that both misread what they wrote. Adopts the angle-bracket half of the suggested fix: `mcp__<SERVER>__*` is the sanctioned multi-character placeholder, exempt by construction because `<` is outside the reference pattern's character class. This pins an existing property rather than adding a special case. Declines the all-caps half. An all-caps exemption would be a false NEGATIVE for any real server spelled in caps, and a guard that misses a dead reference fails in exactly the direction this check exists to prevent. The bare-caps form keeps firing; the message now names the convention as a third remedy. Also corrects "grants neither" in that message, which was wrong for any count other than two. * test(#2526): pin the zero-length server id, completing the boundary triple `mcp____foo` yields `[]`, but for a different reason than the length-1 case: it is unrepresentable by `/mcp__([A-Za-z0-9_-]+?)__/g` since `+?` requires at least one character, so the pattern skips it before the metavariable exclusion is ever consulted. Pinning limit-1 completes the 0/1/2 boundary rule on its own terms and records which mechanism owns the case. * docs(#2526): correct every drifted AGENTS.md Tools row, not just the one The review asked for the one-line `gsd-ui-auditor` correction (missing `Skill`). Sweeping the defect class first — every `**Tools**` row in docs/AGENTS.md against its agent's `tools:` frontmatter — found it was 26 of 34 rows, so the one-line framing was the reviewer's premise rather than the population. Breakdown of the 26: * 21 omitted `Skill`, 6 omitted `Edit` (overlapping) — under-promises, the same drift class as #2526 but in the harmless direction. * 8 wrote `mcp (context7)` as shorthand while frontmatter granted up to 8 servers (firecrawl, exa, tavily, ref, jina, perplexity, both context7s). * 1 was actively wrong: gsd-debug-session-manager documented `Task`, a tool name that no longer exists — the #2526 shape at the doc layer, naming a capability that cannot dispatch. Every row is now the frontmatter `tools:` value verbatim, which is also what makes the parity guard in the following commit non-brittle. The diff is 26 insertions / 26 deletions, all Tools rows. * test(#2526): guard AGENTS.md Tools rows against agent frontmatter The 26 corrected rows in the previous commit were free to drift because nothing asserted the role card and the frontmatter agreed — the same reason the #2526 block itself survived. Correcting them without an invariant just resets the clock. Lands in agent-classification-parity.test.cjs rather than a new file: that suite already owns docs/AGENTS.md as a contract surface, already carries the `allow-test-rule` exemption for treating the doc as the product, and file count is the unit of CI overhead (docs/TESTING-SUITES.md). Compares the row to the frontmatter value VERBATIM, not as a set — a set comparison would keep accepting the "mcp (context7)" shorthand that hid eight grants behind one, which is the under-documentation half of the drift. Carries the same discovery guard #2526's own check uses: a section with a granted `tools:` but no **Tools** row fails loudly, so deleting a row cannot silently retire its assertion. Both halves are negative-controlled — against the pre-fix doc it fails naming 26 rows (gsd-ui-auditor:339 among them), and with a row deleted it fails on the missing-row assertion. * chore(#2526): note the AGENTS.md drift correction in the changeset The role cards are user-visible, and 26 of them documented a tool set the agent did not have. Type, `pr: 2594`, and the trailing `(#2526)` are unchanged. * fix(#2526): use a CRLF-safe split in the AGENTS.md Tools-row guard `lint-tests` (npm run lint:ci) rejected `rawAgentsMd.split('\n')` under the repo's local/no-crlf-fragile-split rule: Windows autocrlf yields CRLF, so a trailing \r rides into the parsed line. Switched to `/\r?\n/`. Caught by CI on the round-3 push before the response comment went out. * docs(#2526): correct the drift tallies stated in c5a9607e Re-derived the census programmatically from the pre-fix doc instead of by eye. The 26-of-34 headline was right; the breakdown was not. Skill omitted 21 -> 22 Edit omitted 6 -> 7 "mcp (context7)" shorthand 8 rows -> 7 rows The 8 was conflating two things: 8 rows omitted MCP grants entirely, but only 7 of them used the "mcp (context7)" shorthand — gsd-executor listed no MCP at all. Also names the one `Agent` omission (gsd-debug-session-manager, the row that still read `Task`). c5a9607e's message keeps the wrong numbers rather than rewriting a pushed branch mid-review; the test comment and changeset are the durable statements and both are corrected here. --------- Co-authored-by: Tom Boucher <trekkie@nomorestars.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.