Lands L3 of the agent-first coverage architecture (ADR-020) — the
mutation-testing layer. Stryker on entities + use-cases (the pure
business-logic surface) catches the third dimension of test quality:
tests that exist + execute the code but assert nothing.
Deps (root devDependencies):
- @stryker-mutator/core ^8.7.0
- @stryker-mutator/vitest-runner ^8.7.0
Shared base: packages/core-testing/stryker.base.json
- testRunner: vitest (uses each feature's vitest.config.ts)
- mutate: src/entities/** + src/application/use-cases/** (excludes
tests, factories, contracts)
- thresholds: high 90 / low 80 / break 80
- reporters: progress + html + json (reports/mutation/{index.html,
mutation.json})
- incremental mode enabled, concurrency 4, timeout 10s
- exposed via @repo/core-testing/stryker.base.json subpath export
Per-feature config: packages/auth/stryker.config.json
- 4-line file that extends the shared base
- Proof-of-concept; other features get a config when L0 unification
closes their existing test gaps
Driver: scripts/coverage/mutate.mjs (zero-dep Node ESM)
- discoverStrykerConfigs: walks packages/* and apps/* for
stryker.config.json
- Supports --filter <name>, --since <ref> (incremental), --json
- Runs Stryker per-feature via node_modules/.bin/stryker run
- Surfaces per-package pass/fail summary; exits 1 on any failure
- Tests: scripts/coverage/mutate.test.mjs (3 tests, all green)
CI: .github/workflows/mutation-nightly.yml
- Cron at 02:30 UTC + workflow_dispatch with filter input
- Uploads reports/mutation/** as artifact (30-day retention)
- On failure, opens a tracking issue labelled mutation-testing
- permissions: contents: read, issues: write
- 60-min timeout (Stryker is slow by design)
Generator: turbo gen feature now scaffolds stryker.config.json from
turbo/generators/templates/feature/stryker.config.json.hbs — new
features ship mutation-ready out of the box.
Guide: docs/guides/coverage.md L3 section fleshed out with run
syntax, config shape, base config inventory, CI behavior, and a
"what you're looking for" primer on mutation scores.
Lockfile churn: pnpm regenerated the lockfile for the new deps;
~5K-line net reduction is collateral (pnpm version drift) but
mechanical.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds the setGenerator("core-ui-component") block, coreUiComponentActions
helper (2 guards + 4 add + 1 modify + 1 print = 8 actions), and
printCoreUiComponentNextSteps to config.ts; covers all three paths with
3 new unit tests in config.test.ts (registration shape, action shape per
tier, PascalCase validator). Generator test count: 17 → 20.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add EVENTS_RULE_BLOCK constant, events entry in CORE_PACKAGE_GENERATORS
dispatch table, events choice in prompts, and printEventsNextSteps helper.
Events entry emits 15 template files + transpilePackages splice + ESLint
no-restricted-syntax splice (E1 + J blocks). Add byte-identical e2e test
that strips @repo/core-events deps before pnpm install, scaffolds via
gen core-package events, and diffs against the snapshot.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Registers pnpm turbo gen core-package with an empty choices list and a
dispatch table that throws for unknown names. Adds vitest config + test
script to turbo/generators and adds it to the pnpm workspace so tests
run via pnpm --filter @repo/turbo-generators test.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Generated handler + Payload event-task via gen event consume,
threaded through symbols / both binders / cms re-export at the
configured anchors. bus.subscribe wires the in-memory delivery in
dev-seed; the __events.auth.user.signed-up.marketing-pages Payload
task closes the production-bus loop.
Also fixes two generator-level issues found during Phase 8:
- Drop publisher prompt's `when` clause so --args can supply the
4th positional argument (Plop limitation: --args cannot bypass
conditional prompts). Validate runs only in consume mode.
- Switch event-task.ts.hbs from TaskConfig<"slug-string"> to
TaskConfig<{ input: ...; output: object }> since runtime-generated
event slugs are not keys of TypedJobs['tasks'].
Adds `pnpm turbo gen job <feature> <slug> <void|typed>` which scaffolds
the factory + test + Payload TaskConfig, then modifies the feature's
job-symbol, job-bind, and cms job-task anchors to wire the wrapped
job into the per-feature container. Also registers a custom Handlebars
`eq` helper used by the void/typed branch in the job templates.
Adds consumeActions for the event generator: scaffolds the handler file
+ test, the Payload event-task that completes the production-bus loop,
modifies the consumer feature's symbols (// <gen:event-handler-symbols>),
both binders (// <gen:event-handlers>), and the cms re-export
(// <gen:job-tasks>). The bind block wraps the handler in span+capture,
binds it into the per-feature container, and subscribes it on the bus.
Wires `pnpm turbo gen event` with publish/consume mode prompt; publish
branch generates the contract file + test and threads it through the
feature's // <gen:events> anchor. Consume branch is a stub that throws
until Task 40 lands the handler-side templates and modify-blocks.
Two diagnostics from the IDE on turbo/generators/config.ts:
1. `Cannot find module '@turbo/gen'` — there was no tsconfig in
turbo/generators/, so the IDE was opening config.ts in loose mode
without proper module resolution context. Added a small
tsconfig.json that extends tsconfig.base, sets NodeNext module
resolution, and includes only ./**/*.ts (templates excluded).
2. `Parameter 'answers' implicitly has an 'any' type` — annotated
the printNextSteps custom-action function param as
`Record<string, unknown>` (Plop's runtime answers shape). The
inner cast to the typed Answers shape was already in place.
`npx tsc --noEmit -p turbo/generators/tsconfig.json` is now clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds `pnpm turbo gen feature` to scaffold a Lazar-conformant feature
package matching the navigation reference shape: entity + Zod schema,
single use case (`get<Entity>`), controller, mock + Payload-stub real
repository (with span + capture), DI module/container/symbols, and tRPC
router with full BAD_REQUEST/NOT_FOUND error mapping. The generated
`bind-production.ts` and `bind-dev-seed.ts` compose the post-R44
`withSpan(tracer, opts, withCapture(logger, tags, factory(deps)))`
sandwich at bind time.
Verified by generating a sample `packages/example/` feature and running
`pnpm --filter @repo/example lint typecheck test` — all three pass
(9 test files, 25 tests). Cleaned up after verification so no example
package is committed.
Phase-1 limitations (documented in `docs/guides/scaffolding-a-feature.md`
and printed by the generator on success): no Payload CMS templates, no
React Query helpers, faker-driven factories left as stubs, single
entity / single use case, and aggregator wiring (core-api/root,
apps/web-next bindAll) is left as a manual checklist.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
