M0.1 - Cargo workspace + crate skeletons (4 tests) ✅ 6-crate workspace with enforced dependency direction ✅ GitHub Actions CI pipeline M0.2 - Domain types and sha256 identity (6 tests) ✅ Level, Role, Record, Chunk, MemoryNode types ✅ Content-hash identity (sha256) ensuring rebuild idempotence ✅ Newtypes (ProjectId, QueryId, RunId) without Default M0.3 - RecordSource trait + ChunkPolicy (6 tests) ✅ RecordSource streaming trait ✅ Chunk policy with token budgets and record boundaries ✅ Chunking stream that respects budgets without splitting records M0.4 - Tokenizer-backed chunk sizing (3 tests + 1 ignored) ✅ Vendored Qwen2 tokenizer with hash verification ✅ QwenTokenCounter for accurate token counting ✅ mem tokens CLI subcommand M0.5 - pi session adapter (5 tests) ✅ PiSessionSource implementing RecordSource ✅ Project key extraction from cwd field ✅ Content flattening for various shapes ✅ Shared flatten_content helper module M0.6 - Claude transcript adapter (4 tests) ✅ ClaudeTranscriptSource implementing RecordSource ✅ Identical content flattening as pi source ✅ Cross-source project key agreement M0.7 - ingest --dry-run (2 tests) ✅ mem ingest --project --dry-run command ✅ Zero network calls guarantee M0.8 - M0 composition gate (5 tests) ✅ Both sources compose through chunker identically ✅ Sources are swappable via RecordSource trait ✅ All role types properly emitted ✅ Chunk boundaries respected, t values contiguous Summary: - 35 integration tests (34 passing, 1 ignored) - Zero clippy warnings with -D warnings - All phases compose and verify correctly - Read-only spine foundation proves extensibility