miroir/notes/miroir-r3j-final-verification.md

Phase 3 (miroir-r3j): Final Verification — Complete

Date

2026-05-09

Summary

Phase 3 (Task Registry + Persistence) was already fully implemented in the codebase. This final verification confirms all Definition of Done criteria are met.

Definition of Done — All Complete ✅

1. rusqlite-backed store initializing every table idempotently at startup ✅

Location: crates/miroir-core/src/task_store/sqlite.rs

• SqliteTaskStore::new() creates/opens SQLite database
• initialize() calls init_schema() with CREATE TABLE IF NOT EXISTS
• WAL mode enabled for better concurrency
• Schema version tracked in schema_version table

2. Redis-backed store mirrors the same API (trait TaskStore) ✅

Location: crates/miroir-core/src/task_store/redis.rs

• Implements TaskStore trait with 50+ methods
• All 14 tables mapped to Redis hashes with _index secondary sets
• Runtime backend selection via create_task_store() factory

3. Migrations/versioning with schema_version row ✅

Location: crates/miroir-core/src/task_store/schema.rs

• SCHEMA_VERSION constant (currently 1)
• Version check on initialization rejects mismatched schemas
• Both SQLite and Redis backends track version

4. Property tests on SQLite backend ✅

Location: crates/miroir-core/tests/task_store.rs

• Round-trip tests for all table types
• Upsert semantics validation
• Proptest for task filtering
• 650+ lines of comprehensive test coverage

5. Integration test for pod restart simulation ✅

Location: crates/miroir-core/tests/task_store.rs::restart_survival

• Creates store, inserts data, closes connection
• Reopens and verifies data survived
• Tests task persistence and status updates

6. Redis-backend integration test with testcontainers ✅

Location: crates/miroir-core/tests/task_store_redis.rs

• Uses testcontainers for real Redis instance
• Tests leader lease, idempotency, rate limiting, CDC overflow, scoped keys
• 440+ lines of Redis-specific tests

7. miroir:tasks:_index-style iteration for list endpoints ✅

Location: crates/miroir-core/src/task_store/redis.rs

• index_key() method generates _index set keys
• All *_list() methods use smembers() for O(cardinality) queries
• No SCAN required

8. Helm schema enforces taskStore.backend: redis + replicas > 1 ✅

Location: charts/miroir/values.schema.json (lines 142-186)

• Enforces Redis when replicas > 1
• Enforces Redis when hpa.enabled: true
• Clear error messages explaining constraints

9. Redis memory accounting validated against representative load ✅

Location: docs/redis-memory-accounting.md

• Complete keyspace inventory
• Per-entry size calculations
• Representative load: ~2.8 MB baseline
• Scaling recommendations provided

Implementation Summary

Files Implemented

• crates/miroir-core/src/task_store/mod.rs — Unified TaskStore trait (298 lines)
• crates/miroir-core/src/task_store/schema.rs — All 14 table definitions
• crates/miroir-core/src/task_store/sqlite.rs — SQLite backend (1,535 lines)
• crates/miroir-core/src/task_store/redis.rs — Redis backend (926 lines)
• crates/miroir-core/src/task_store/error.rs — Error types

Test Coverage

• tests/task_store.rs — SQLite property tests (650 lines)
• tests/task_store_redis.rs — Redis integration tests (440 lines)

Documentation

• docs/redis-memory-accounting.md — Complete memory analysis
• Inline documentation in all source files

Conclusion

Phase 3 is complete and production-ready. The task store provides:

• Dual backend support (SQLite for single-pod, Redis for multi-pod)
• All 14 tables from plan §4
• Comprehensive test coverage
• HA-ready architecture for Phase 6

All future features (plan §13 advanced capabilities, §14 HA modes) can consume this persistence layer.