Thicken the two flagship engineering methodology skills with the artifact
set promised by issue #239: schema-v1 eval manifests (6 cases each), fillable
templates, and one small stdlib-only script per skill with tests.
backend-engineering:
- evals/evals.json: API implementation review, endpoint modeling, service
structure, error handling, N+1 detection, integration retry/idempotency
- templates/service-design-record.md, templates/error-handling-taxonomy.md
- scripts/n1-query-spotter.py (+ test_n1_query_spotter.py): flags query-like
calls inside loops with loop-variable confidence, --json output
frontend-engineering:
- evals/evals.json: component/state design, state management selection, API
integration, data-fetching states, performance review, performance budgets
- templates/component-state-design-record.md, templates/performance-budget.md
- scripts/bundle-budget-checker.py (+ test_bundle_budget_checker.py): enforces
total and per-chunk byte budgets on bundle reports, exit 1 on violation
Both SKILL.md files gain Templates and Scripts sections; both READMEs document
the scripts in Quick Start. All local validators pass (validate-skills.rb,
validate-evals.py, eval-coverage ratchet, make validate).
Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>