* feat(#1681): ADR-1239 Phase C-2 — companion MCP server module (points 1 + 5) [slice 3a] Phase 4 slice 3a. A minimal, dependency-free stdio JSON-RPC 2.0 server exposing two of the six interface points so any MCP-consuming host (Claude/Codex/OpenCode/ VS Code/Gemini/Cursor/Cline/Hermes) can drive GSD with no bespoke plugin: - point 1 (command): tool gsd_invoke_command -> createHub/dispatch. - point 5 (state IO): tools gsd_read_state / gsd_write_state -> the Phase 3 stateIO seam (filesystem default). - src/mcp-server.cts: handleMessage(request, ctx) pure JSON-RPC handler (initialize / tools/list / tools/call) + runServer({input, output}) thin line-delimited-JSON loop over injectable streams. 3 tools wired to the existing engine surfaces. NO new dependency (hand-rolled JSON-RPC; the repo ships only claude-agent-sdk + ws — an MCP SDK is a separate packaging call). - tests/gsd-mcp-server.test.cjs: 9 tests (initialize, tools/list, state read/write round-trip, command dispatch, unknown tool / missing name / unknown method / notification / parse error, injectable-stream round-trip). Bin entry / packaging / manifest-version-sync / process-lifecycle docs -> slice 3b. This slice ships the importable, tested server surface a host (or the bin shim) drives. Proactive CI gates: ADR-457 ignores + INVENTORY-MANIFEST + injection-scan audit. All clean locally (9 tests + security 15/15 + inventory + eslint 0 problems). * chore(changeset): add Changed fragment for companion MCP server module (#1681)
Changeset Fragments
This directory holds per-PR CHANGELOG fragments. Every PR with user-facing changes drops one (or more) <random-name>.md files here describing its CHANGELOG entry. Fragments are consolidated into the top-level CHANGELOG.md at release time.
Why
Two PRs that both edit the ### Fixed block of CHANGELOG.md always conflict on merge — git can't pick a serialization order without human input. Two PRs that each add a fresh .changeset/<unique-name>.md never conflict because they don't share lines.
See #2975 for the full rationale.
Adding a fragment
node scripts/changeset/new.cjs \
--type Fixed \
--pr 1234 \
--body "fix the thing — explain the user-visible change in one sentence"
This writes .changeset/<adjective>-<noun>-<noun>.md with frontmatter and a body. Three random words → concurrent PRs don't collide.
Format
---
type: Fixed
pr: 1234
---
**`/gsd-foo` no longer drops trailing slashes** — explain the user-visible change.
Allowed type: values follow Keep a Changelog: Added, Changed, Deprecated, Removed, Fixed, Security.
Opting out
PRs that legitimately have no user-facing impact can add the no-changelog label. CI honors it. When unsure, add the fragment.
At release time
Promotion is automatic. The release workflow's finalize job runs:
node scripts/changeset/cli.cjs render --version vX.Y.Z --date YYYY-MM-DD --allow-empty
This reads every fragment, groups bullets by type:, replaces ## [Unreleased] with a new ## [vX.Y.Z] - YYYY-MM-DD block, opens a fresh ## [Unreleased] above, and deletes consumed fragments. The --allow-empty flag ensures a no-change release still gets a dated heading (with a _No notable changes._ placeholder). A subsequent verify step confirms the promotion landed correctly. Maintainers do not run this by hand.
Archived fragments
.changeset/archived/ holds fragments for already-shipped releases (≤ 1.3.1), retained for provenance. Their content was hand-curated into the dated ## [1.x.y] sections of CHANGELOG.md during the #690 backfill — they were never consumed by render. All changeset tooling enumerates .changeset/ non-recursively, so archived fragments are never picked up or rendered. Do not move them back to the top level.