* perf(ci): cut hosted CI critical path toward five-minute walls
Stripe the serial core test-type graphs across two hosted jobs and drop the
duplicated tsgo:test:root pass; gate the six-part QA Smoke matrix off pull
requests unless a QA-owned surface changed; split the fat multi-config Node
shards (cli/cli-process, unit-fast isolated/fake-timers, infra
logging-process/runtime-config) and lower the hosted split ceiling to 150
predicted seconds so no compact lane owns a ~280s wall; expand tooling to
seven stripes.
* perf(ci): widen hosted test-type striping to three jobs
Run 31825922122 measured ~40s per core test-type graph on loaded hosted
runners (282s worst stripe body of the two-way split); three stripes keep
each lane near 150s body under load.
Five-file Telegram jobs finished the first file, then isolate re-imported the next graph in silence until the 300s watchdog killed the worker. Recycle the Vitest process after each file and keep five files per CI job.
The PR-changed test planner fails safe to the compact full-suite plan for any diff touching packages/**, but that compact plan excludes all extension test configs, so mixed package+extension PRs landed with zero extension test execution (escapes: PR #120534 breaking extensions/codex run-attempt.native-hook-relay.test.ts, PRs #122163/#121522 and cd7b7f639d breaking media-understanding-provider.test.ts and thread-lifecycle.test.ts on main full runs). The preflight now appends whole-config shards for the diff's touched extensions whenever the precise plan fails safe; whole configs (not precise targets) because the fail-safe cause leaves the non-extension diff's extension impact unbounded.
* refactor: use canonical re-export names
* fix(test): classify suite support as test source
* fix(agents): retarget gateway stub session-entry import
* test(gateway): retarget session-utils mock keys after alias removal
Peter Steinberger