Phase 5.1 of the CJS↔SDK hard-seam migration (parent #3524). Migrates
the bin/lib/state-command-router.cjs handlers map to delegate every
canonical state subcommand through the executeForCjs synchronous
primitive (shipped in Phase 5.0, PR #3558).
## Bundled fix for Phase 5.0 worker defect
Discovered during Phase 5.1 implementation that the Phase 5.0
worker drops projectDir and workstream from
RuntimeBridgeExecuteInput. The dispatch closure at
sdk/src/runtime-bridge-sync/worker.ts:41-42 hardcoded projectDir
to '', so registry handlers that read .planning/ from projectDir
(every state.* handler) saw an empty path and failed. Phase 5.0's
pinning tests passed because they exercised commands that don't
depend on projectDir (generate-slug takes its arg directly;
unknown_command doesn't dispatch). Maintainer authorized bundling
the fix into this PR.
Fix: moved QueryNativeDirectAdapter construction inside the
dispatchNative lambda so request.projectDir and request.workstream
close over the per-request values. Per-request adapter construction
adds <1ms overhead; correctness wins. Regression test at
sdk/src/runtime-bridge-sync/projectdir-regression.test.ts demonstrates
RED before fix → GREEN after.
Phase 5.0's index.test.ts native_failure fixture was passing
because of the bug — it relied on projectDir = '' producing a
specific error path. Updated to use a /nonexistent-... path that
triggers ENOENT under realpath, producing native_failure as intended.
## What landed for Phase 5.1
- bin/lib/state-command-router.cjs migrated. Every subcommand
entry in the handlers map dispatches via executeForCjs when SDK
is available, with transparent fallback to the existing CJS
handlers in state.cjs if (a) SDK is not built / not present, or
(b) GSD_WORKSTREAM is set (the sync-bridge worker cannot serve
workstream-scoped commands per the SDK transport architecture).
- Special cases preserved:
- load --raw: SDK data formatted into key=value lines matching
cmdStateLoad's exact format.
- complete-phase: CJS-only (no SDK counterpart yet).
- add-roadmap-evolution: stays on the unsupported list (SDK-only).
- Golden parity tests added for 12 previously-uncovered state
subcommands: advance-plan, record-metric, update-progress,
add-decision, add-blocker, resolve-blocker, record-session,
signal-waiting, signal-resume, planned-phase, milestone-switch,
prune.
## Design decisions worth reviewer visibility
1. Lazy SDK loading with CJS fallback. The migration routes via
executeForCjs only when the SDK is loadable; otherwise falls
back to the existing CJS handlers. Conservative for rollback —
if the SDK build is broken on a deploy, state commands keep
working via the CJS path. Trade-off: drift surface is not
structurally eliminated yet — the CJS handlers remain reachable.
2. Workstream → CJS fallback. The SDK transport forces subprocess
for workstream commands, but subprocess is disabled in the sync
bridge. When GSD_WORKSTREAM is set, the entire state command
falls back to CJS rather than failing. Workstream users continue
running the CJS handlers; the SDK path is exercised only in the
default (no workstream) case.
3. Two documented parity divergences. state.record-metric: CJS
auto-creates ## Performance Metrics section when absent; SDK
returns {recorded: false, reason}. Test requires fixture with
the section present. state.prune: CJS counts phases from disk;
SDK reads from frontmatter fields. Test asserts structural shape
rather than exact equality.
## Numbers
- Full CJS suite: 9323/9323 pass (baseline 9323; +0 net because
the 12 new parity tests are SDK-side vitest, not CJS-side).
- SDK vitest sync-bridge: 10/10 pass.
- Regression test: 3/3 pass (proved RED before fix, GREEN after).
- tests/state.test.cjs (the safety net): 104/104 pass unchanged.
## Performance
gsd-tools state load via the SDK path: 49ms first call (Worker
startup), 43-44ms steady-state median. Slower than the
Phase 5.0-measured 0.1ms because state.load does fs reads on top
of the bridge overhead. Still well within the budget for CJS
dispatcher overhead.
Closes#3567.
Phase 5.0 of the CJS↔SDK hard-seam migration (parent #3524).
Foundational PR. Ships ONLY the synchronous primitive on the SDK
runtime bridge plus pinning tests. Per-family CJS router migrations
(state.*, verify.*, init.*, phase.*, phases.*, validate.*,
roadmap.*, frontmatter.*, config.*) become follow-up enhancements
that each reuse this primitive.
## What landed
- sdk/src/runtime-bridge-sync/index.ts (155 lines) — public API.
Exports executeForCjs(input: RuntimeBridgeExecuteInput):
RuntimeBridgeSyncResult. Synchronous; lazily creates the
synckit sync function on first call.
- sdk/src/runtime-bridge-sync/worker.ts (167 lines) — synckit
worker. Constructs a native-only QueryRuntimeBridge (with
allowFallbackToSubprocess: false), awaits its async execute,
catches GSDToolsError / GSDError, maps classification to the
six ADR-0001 canonical error kinds plus exit code.
- sdk/src/runtime-bridge-sync/index.test.ts (197 lines, 8 vitest
pinning fixtures) — success path; unknown_command;
native_failure (shape); validation_error (shape); shape
invariants; idempotency.
- tests/runtime-bridge-sync-smoke.test.cjs (99 lines, 4
node:test cases) — proves the primitive works from CJS
callers via require().
## Decisions
1. Synchronous-bridging mechanism: synckit. Disqualified:
- deasync: stagnant (68 open issues, single maintainer,
last release Nov 2025), private Node API (process.binding('uv')),
untested on Node 22, documented deadlocks with modern
Promise chains.
- Sync-native SDK refactor: technically infeasible —
acquireStateLock in state-mutation.ts uses await setTimeout
for retry backoff; making that fully sync requires either
Atomics.wait (which IS synckit), busy-loop (degrades
responsiveness), or breaking 100+ SDK consumers.
Synckit (v0.11.12) is pure JS, actively maintained (last
push today), stable public APIs (Atomics.wait +
SharedArrayBuffer), Node 22 compatible, no native compile.
2. Native-only transport inside the worker. The sync bridge
uses allowFallbackToSubprocess: false. Unknown commands
surface as unknown_command instead of spawning gsd-sdk.
Keeps the worker self-contained and predictable.
3. Worker path resolution. resolveWorkerPath() navigates ../..
from the loaded module URL to land at
dist/runtime-bridge-sync/worker.js — works under both
vitest (loads src) and CJS consumers (load dist).
4. GSDError.Blocked → validation_error. ADR-0001's 6-kind
taxonomy has no `blocked` kind; Blocked classification is
mapped onto validation_error since the operational shape
matches (prerequisite missing).
## Numbers
- 8 SDK vitest pinning tests pass.
- 4 CJS smoke tests pass.
- Full suite: 9286/9286 pass (baseline 9282; +4 from the
new smoke test cases).
- SDK vitest unit: 1860/1860 pass.
- Performance: 80ms first-call cold latency (Worker startup +
bridge construction); 0.1ms steady-state per-call latency
(10-call average after warmup). Well within budget for CJS
dispatcher overhead.
## Canonical error kind coverage
- unknown_command: covered with pinning fixture
- native_failure: shape coverage (handler that throws)
- validation_error: shape coverage (GSDError.Validation +
GSDError.Blocked)
- internal_error: shape coverage only (eliciting TypeError
reliably from a registered handler requires elaborate fixture)
- native_timeout: NOT pinned (no registered handler genuinely
times out; classification logic present in worker)
- fallback_failure: NOT pinned (subprocess fallback disabled
by design in sync bridge)
The classification logic is in the worker regardless; per-family
migration PRs will exercise the unpinned kinds incidentally.
## Wiring
- sdk/package.json: synckit ^0.11.12 added as runtime
dependency (not devDependency — it's required at runtime
whenever a CJS caller invokes executeForCjs).
- sdk/package-lock.json: regenerated.
- CONTEXT.md: new "Sync Runtime Bridge Module" entry added
after Dispatch Policy Module. Existing "CJS Command Router
Adapter Module" entry amended with one sentence pointing at
the primitive and the per-family migration roadmap.
No generator/freshness check needed for this phase — the
primitive IS the SDK (not a generated CJS mirror).
Closes#3555.
