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https://github.com/deepseek-ai/deepseek-harness
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- domain/changed emission is isolated from the write path: an observer throwing synchronously can no longer turn a committed (durable + in-memory) write into a rejection; the failure is logged and later writes proceed. - Domain lifecycle belongs to the opening consumer: Domain gains an idempotent close() (drain, unit close, reservation release), the facility stops registering effects on its own context and instead closes any still-open domains on unmount; WorkspaceRegistry holds its domain through its own effect, so disposing and re-mounting the consumer no longer wedges on already-open. - defineDomain rejects a global schema accepting null at declaration time: JSON null is the medium's absence sentinel, so a nullable global could never round-trip; failing loud at the spec keeps set(null) unrepresentable. Regression tests cover all three (hostile listener, close/reopen and consumer re-mount, nullable-global rejection).
storage/ — non-session storage family
The storage family persists everything that is not a session event log: a hub where named backends and typed data forms meet. Design record: domain KV storage Agent Note.
| Package | Role | ctx key |
|---|---|---|
storage/ |
The hub: named backend registry + merge-extensible data-form mounts, backend facet vocabulary, shared conformance suite | ctx.storage |
storage-json/ |
JSON backend: one human-readable file per unit, atomic whole-file rewrite | registers backend json |
storage-sqlite/ |
SQLite backend: one database hosting all routed units, document-per-row | registers backend sqlite |
domain/ |
Domain data form: zod-validated records, per-domain write chain, domain/changed events, backend routing by configuration |
mounts ctx.storage.domain |
Backends own one medium each and expose data-shape facets (kv today; an append-log facet is reserved for the future session-backend migration). Consumers never touch backends directly — they open declared domains through the domain form.