[xandreeddev]

What

• Add MediaStore, its memory adapter and shipped conformance kit, plus MediaStoreDirectoryLive in the files plugin. Immutable SHA-256 blobs are durably published before journal references.
• Add withMediaStore with entry/byte-bounded LRU hydration. Exact manifests preserve attachments, queued input, command JSON, nested encoded results, provider results and request-part identities, including occurrence labels and opaque JSON fields.
• Apply inclusive read ceilings before fork hydration. Retain native file-operation slots until settlement, bound queued admission, and release only a cancelled call's own health probe while preserving commit nonce and ACK behavior.
• Register physical references as stored format 11. Logical readers/replay still receive inline values, and old inline records remain readable. Physical backups retain the media directory; older unwrapped typed readers need hydrated exports or an updated reader. Session deletion does not collect shared blobs.

Checks

• Full key-free suite: 3,295 pass, four expected environment skips, zero failures.
• Frozen install, zero-baseline typecheck, foundry self-check/demo, package build and strict packed verification: pass. The declaration-only follow-up preserves the emitted runtime file byte for byte.
• Memory/directory media kits and decorated SessionLog kit pass. Focused regressions cover whole-input snapshots, mutable ACK expectations, typed-array bounds/copies, exact JSON literals/metadata, missing/corrupt blobs, LRU budgets and physical IO lifetime/admission.
• Packed Node/Bun real Agent/files journeys verify each promised media path, logical request replay, legacy inline history, cold restart, fork cutoffs with missing future blobs, shared-blob retention, two SIGKILL publication checkpoints and takeover after a held committed journal ACK. Earlier resolver, retry, failure, cache, overflow, queue and restart fixtures pass.
• All 34 prior stored-shape hashes and formats 1–10 remain unchanged. Only two physical shapes are added; the development journal changes its format metadata only. Both released fixtures and all three model goldens remain byte-identical.
• Generated docs stay clean; website/internal links and the required Bun 1.3.6 proxy repeat pass.
• No live provider calls or credentials are required or used.