Implementor Guidelines (Stub)

Use with sprint task 18 (IMPLEMENTOR-GAPS-300-018).

Determinism/offline: pin toolchains, seeds, inputs.lock; no live network in examples.
Provenance: DSSE-sign schema and results; keep tenant scoping explicit.
Docs touch rule: enforce docs: tag (value or docs: n/a) in commits/PRs.
Boundary rules: respect module working directories and shared-lib allowlist.
Perf/quota: capture perf budgets and quota impacts when changing hot paths.
Versioning: schema changes require version bump and changelog note.
CI lint: tools/lint/implementor-guidelines.sh (stub) to be wired into CI; add to pre-commit or CI pipeline when wiring determinism checks.
Determinism checks: prefer UTC, sorted outputs, pinned seeds; add inputs.lock when adding new fixtures or packs.