Files
msd-core/docs/adr
Tom Boucher e437ded6fc docs(3524): CJS↔SDK hard-seam ADR + phased PRD (#3529)
* docs(3524): propose CJS↔SDK hard-seam ADR + phased PRD

Adds docs/adr/3524-cjs-sdk-hard-seam.md (Proposed) and
docs/prd/3524-cjs-sdk-hard-seam.md (Reference) tracking #3524.
Updates the ADR and PRD index READMEs.

The ADR defines one canonical owner per responsibility across the
CJS (bin/lib/*.cjs) and SDK (sdk/src/**/*.ts) sides, eliminating the
recurring drift bug class (#1535, #1542, #2047, #2638, #2653, #2687,
#2798, #3055, #3523). Three layers: shared data (sdk/shared/*.json),
shared core logic (sdk/src/core/ → dual CJS+ESM build), thin adapters.
Enforcement is layered: build-time grep, type-level contract test,
mutation parity test, CODEOWNERS gate, in-file banner.

The PRD phases the migration in five independently shippable steps —
shared data first (closes constant drift), then config consolidation
(closes #3523 class), then project-root + path projection, then state
and verify handlers, then enforcement hardening + retrospective.

* docs(3524): revise seam ADR + PRD after architecture review

Architecture-review pass (via /improve-codebase-architecture) found
seven deepening opportunities; this commit applies all of them.

1. Re-anchor on the existing generator precedent. The repo already
   has sdk/scripts/gen-command-aliases.ts emitting both
   .generated.ts and .generated.cjs from one TS source, with
   sdk/scripts/check-command-aliases-fresh.mjs as the CI freshness
   gate. The ADR's invented dual CJS+ESM bundler pipeline is
   dropped. Each Shared Module gets one generator script and one
   freshness check, modeled on that precedent.

2. Drop the generic sdk/src/core/ container. The canonical-owner
   table is now indexed by Module, using the CONTEXT.md domain
   vocabulary (STATE.md Document Module, Configuration Module,
   etc.) rather than file-path-based pseudo-modules.

3. Split the coarse "State management" row into three: the pure
   STATE.md Document Module (already a character-identical
   hand-synced pair — perfect Phase 1 target), the Planning
   Workspace Module (defer to ADR-0004), and per-side state I/O
   Adapters (legitimately differ sync vs async).

4. Defer to existing ADRs. Planning Path Projection (ADR-0006),
   Model Catalog (ADR-0003), Planning Workspace (ADR-0004),
   Dispatch Policy (ADR-0001), Shell Command Projection (ADR-0009
   post-Phase 3-4 expansion which absorbed superseded ADR-0010).
   The stale ADR-0010 reference is fixed.

5. Define a Configuration Module entry in CONTEXT.md as a Phase 2
   deliverable, with explicit Interface contract for loadConfig,
   normalizeLegacyKeys, mergeDefaults, migrateOnDisk.

6. Split the Workstream Inventory Module into a pure Builder
   (generated, shared) and per-side Reader Adapters (hand-authored,
   sync vs async). Same pattern generalizes to other paired Modules.

7. Match enforcement to existing scripts. Per-Module freshness
   checks (precedent: check-command-aliases-fresh.mjs), per-Module
   drift lints (precedent: lint-shell-command-projection-drift.cjs),
   and one hand-sync pair lint that blocks the #3523 anti-pattern
   at PR time.

PRD phases reordered: STATE.md Document Module ships first as a
proof of pattern (two identical files become one source plus one
generated artifact). Configuration Module ships second, closing
the #3523 class. Workstream Inventory Builder split third.
Project-Root Resolution fourth. Enforcement and retrospective
fifth.

* docs(3524): expand scope — CJS router delegates to SDK runtime bridge

User flagged that the original "Out of scope" list was my unilateral
scoping call, not theirs. After review, the CJS router consolidation
(formerly out-of-scope item #1) is brought into scope.

ADR additions:
- CJS Command Router Adapter Module row added to canonical-owner
  table. Existing Module (per CONTEXT.md) is amended so the
  per-family `handlers` map delegates to `QueryRuntimeBridge.execute()`
  in-process. Per-side CJS handler files for canonical families
  (state.cjs, verify.cjs, init.cjs, phase.cjs, etc.) shrink to
  delegates or are deleted.
- Per-side I/O Adapter consequence updated to clarify the bridge
  preserves the in-process model. No subprocess hop is added.
- "Out of scope" stripped of router item; CJS-only seam migration
  and verify-Module-first work remain out of scope.

PRD additions:
- New Phase 5: CJS Command Router Adapter delegates to SDK runtime
  bridge, family-by-family, with golden parity matrix per family
  gating each PR.
- Old Phase 5 (enforcement) renumbered to Phase 6, expanded to cover
  Phase 5's parity matrix and runtime-bridge CODEOWNERS.
- Open question #4 added for the synchronous-bridging mechanism
  (`deasync` vs `Atomics.wait` vs sync-handler refactor) — resolved
  in the Phase 5 spike before any family migration begins.
- Open question #5 added for family migration order (recommended:
  smallest read-only family first).
- Risks table expanded with three Phase 5 rows: bridging-mechanism
  uncertainty, observable-output regression, startup-time impact.
- Done-when updated for six phases and five enforcement layers.

Non-goals updated: CJS-only Module migration and verify-Module
deepening remain out of scope. CJS CLI removal explicitly stays
off the table — the external `gsd-tools` contract is preserved.

* docs(3524): address CodeRabbit review

* docs(3524): fix PRD issue reference markdown
2026-05-14 22:08:33 -04:00
..

Architecture Decision Records

This directory contains Architecture Decision Records (ADRs) for GSD.

Each ADR documents one architectural decision: what was decided, why, and what consequences follow. ADRs are append-only. Amendments extend existing ADRs with a dated section rather than replacing them.

Naming Convention

New ADRs use issue#-prefix slug naming:

docs/adr/<issue#>-<kebab-slug>.md

Examples: 3485-adr-prd-naming-convention.md, 3464-review-default-reviewers.md.

Why

Two developers computing "next ADR number" locally against main will independently pick the same integer and both ship. The collision is already on disk — 0010-* exists twice and 0011-* exists three times. GitHub issue numbers are server-assigned and atomic: the moment you open an issue, that number is reserved globally. Two PRs that both edit the ### Fixed block of CHANGELOG.md always conflict on merge — two PRs that each use a distinct issue# as their ADR prefix never collide. Same shape, same solution.

Legacy ADRs

Files 0001-* through 0011-* are preserved as immutable historical record. The duplicate 0010-* and the three-way 0011-* are documented residue of the old local-compute convention — not patterns to imitate. Do not renumber them.

Full process

See CONTRIBUTING.md — "Proposing an ADR or PRD" for the end-to-end workflow: opening the issue, waiting for approval, naming the file, and submitting the PR.

Index

ADR Title Status
0001-dispatch-policy-module.md Dispatch policy module as single seam for query execution outcomes Accepted
0002-command-contract-validation-module.md Command Contract Validation Module Accepted
0003-model-catalog-module.md Model Catalog Module as single source of truth for agent profiles and runtime tier defaults Accepted
0004-worktree-workstream-seam-module.md Planning Workspace Module as single seam for worktree and workstream state Accepted
0005-sdk-architecture-seam-map.md SDK Architecture seam map for query/runtime surfaces Accepted
0006-planning-path-projection-module.md Planning Path Projection Module for SDK query handlers Accepted
0007-sdk-package-seam-module.md SDK Package Seam Module owns SDK-to-get-shit-done-cc compatibility Accepted
0008-installer-migration-module.md Installer Migration Module owns install-time upgrade safety Accepted
0009-shell-command-projection-module.md Shell Command Projection Module owns runtime-aware OS command rendering Accepted
0010-file-operation-engine-module.md File Operation Engine Module owns safe runtime/config file mutations Proposed
0010-skill-surface-budget-module.md Skill Surface Budget Module — earlier draft superseded by ADR-0011 Superseded by 0011
0011-skill-surface-budget-module.md Skill Surface Budget Module owns install-time profile staging and runtime surface control Accepted
0011-review-default-reviewers.md Review default-reviewers selection policy for /gsd:review Accepted
0011-review-default-reviewers-prd.md PRD for review.default_reviewers feature (#3464) Reference
3524-cjs-sdk-hard-seam.md CJS↔SDK hard seam — single canonical owner per responsibility (#3524) Proposed

Seam map

ADR 0005 is the top-level SDK seam index. It references per-seam ADRs and states the narrow-waist principle each seam follows. Use it as the entry point for understanding SDK module ownership.

ADR 0006 documents how SDK query handlers project planning paths (cwd → effectiveRoot → .planning/<project>/...). Cross-reference with the Planning Workspace Module (ADR 0004) for workstream pointer policy.

ADR 0008 documents the Installer Migration Module for safe install-time moves, removals, config rewrites, and user-data preservation.

ADR 0009 documents the Shell Command Projection Module seam for runtime-aware projection of installer-owned command text and projection IR.

ADR 0010 documents the File Operation Engine Module seam for converging installer/migration/planning file mutation safety policy, and its relationship to ADR 0009 hook-command ownership policy.

ADR 0011 documents the Skill Surface Budget Module for install-time skill/agent profile staging (--profile=<name>, .gsd-profile marker, requires: closure) and the Phase 2 runtime /gsd:surface command for cluster-level enable/disable without reinstall.