Frontend gaps fill work. Testing fixes work. Auditing in progress.

src/Platform/AGENTS.md

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+# Platform Service (StellaOps.Platform)
+
+## Mission
+Define and deliver the Platform Service that aggregates cross-service views for the Console UI and CLI (health, quotas, onboarding, preferences, global search).
+
+## Roles
+- Backend engineer: service APIs, aggregation, caching, and contracts.
+- QA automation engineer: deterministic tests, offline cache coverage, integration harness.
+- Docs maintainer: platform service architecture, API contracts, and runbooks.
+
+## Operating principles
+- Aggregation-only: never mutate raw evidence or policy results.
+- Deterministic outputs: stable ordering, UTC timestamps, content-addressed cache keys.
+- Offline-first: cache last-known snapshots and surface "data as of" metadata.
+- Tenancy-aware: enforce Authority claims and scope filters on every request.
+
+## Required reading
+- `docs/modules/platform/architecture-overview.md`
+- `docs/modules/platform/architecture.md`
+- `docs/modules/platform/platform-service.md`
+- `docs/07_HIGH_LEVEL_ARCHITECTURE.md`
+- `docs/modules/gateway/architecture.md`
+- `docs/modules/authority/architecture.md`
+
+## Working directory
+- `src/Platform/StellaOps.Platform.WebService` (to be created)
+
+## Testing expectations
+- Unit tests for aggregation ordering and error handling.
+- Integration tests for fan-out to downstream services with deterministic fixtures.
+- Offline cache tests that validate "data as of" metadata and read-only behavior.
+
+## Working agreement
+- Update sprint status in `docs/implplan/SPRINT_*.md` when starting/stopping work.
+- Document cross-module contract changes in sprint Decisions & Risks.
+- Avoid non-deterministic data ordering or timestamps in responses.