v0.2.0: contextual memory client

Atom Memory v0.2.0 separates contextual read, content search, observed-version inspect, automatic-ID write, and private transactional edit. The harness automatically replaces its memory region; arbitrary roleful relationships, provenance, CAS edits, retained historical arrangements and authorized succession use the same store and retrieval path.

Upgrading from v0.1 requires the included migration guide. AtomKernel remains available, and the old harness is exported as LegacyAgentHarness.

Validation: 82 tests pass on Node 22/24/26; GitHub CI passes on Node 22/24. Documentation examples are extracted, typechecked and executed. The registry tarball was installed in a fresh consumer and verified for all five APIs, SQLite, automatic recall and public types. A real local Qwen2.5-7B model completed the explicit host Writer workflow and the three-condition synthetic comparison; failures and limits are recorded. This does not establish general model quality, ANN quality or distributed storage guarantees.

• npm: https://www.npmjs.com/package/atom-memory/v/0.2.0
• Documentation: https://atom-memory.takos.jp
• Migration: https://atom-memory.takos.jp/migration
• Verification: https://github.com/tako0614/atom-memory/blob/main/validation/README.md
• Publication readback: https://github.com/tako0614/atom-memory/blob/main/validation/release.json

Baseline: 0c5a5aeb29b1a11195cb74d562f00c5dd6edec15
Implementation: 7702e1812af2d4cb094e7e042abf3fde4f4fc37b
Tarball SHA-256: e16f257e6989bb51665de44cfcf94540780069aeaae0987558a0579384eebeca