slhx agent
a28eb78ded
Keep local/offline and host capability recipes on app-owned command/event/projection flow without teaching raw EffectBatch as the authoring boundary. req: local/001 req: local/002 req: host/002
56 lines
2.3 KiB
Markdown
56 lines
2.3 KiB
Markdown
# Recipe: local command log
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A hemx app may feel local-first without making hemx core a client database or
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sync framework. The local artifact is an app-owned command/event log plus a
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projection; hemx effects are rendered output, not stored truth. req: local/001
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req: local/002
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## Decision: no `hemx-local` crate yet
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`hemx local` remains an app/recipe pattern for now, not a reusable hemx layer.
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The host capability path proves that thin typed contracts work when the shared
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semantics are obvious: manifest, call, event, and host-check failure. The local
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exemplar proves a safer boundary for offline work: command, domain event,
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projection, then generated UI effects. It does not yet prove common storage,
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reconciliation, export, deletion, or conflict semantics across apps, so a crate
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would freeze product policy too early. req: local/002 req: local/003 req:
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local/004
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A future reusable layer must first prove at least two independent apps share the
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same command-log contract without sharing domain policy, storage provider, sync
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provider, or conflict rules. Until then, recipes and app-owned integrations are
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more honest and easier to delete. req: local/002 req: local/003
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## Shape
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```text
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user intent
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→ LocalCommand
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→ domain validation
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→ LocalEvent
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→ Projection
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→ generated UI effects
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```
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The log may live in memory, IndexedDB, SQLite, a native host store, or another
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app-chosen persistence layer. That storage choice is not hemx core. req: local/002
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## Replay and sync
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Replaying local work to a server, remote AI/STT gateway, backup target, or peer
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sync engine is explicit product policy. The app decides what can be queued,
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exported, deleted, reconciled, retried, rejected, or redacted. A local projection
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can render immediate feedback while those decisions remain pending. req: local/003
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## Boundary
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Do not persist DOM patches as truth. Do not persist generated UI effect payloads
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as the local application log. Those are render instructions produced after
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app/domain code accepts commands and projects events. req: local/001 req:
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local/004
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Use `hemx-host` only when the local log needs device or shell capabilities such
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as secure storage, files, haptics, microphone, or notifications. The host still
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returns facts; app code still owns the command/event/projection policy. req:
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host/002 req: local/003
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