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https://github.com/deepseek-ai/deepseek-harness.git
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_Kerman
1201ecc828
Restore the storage-domain medium the file-root design replaced: the cache opens the session_projcache domain (per-record layout — one document per session under the json backend root) and checkpoint writes land through the domain's write chain. Reads and writes now share ONE coherent state: cachedSnapshot reads synchronously from the domain's in-memory tables, and every write is durability-first-then-memory, so a read can never go around the write chain to the medium. The hand-rolled write chains, in-flight tracking, per-session file paths, owner-only file modes, and the sqlite no-path special case are gone; Config.root is removed and the domain's version stamp makes a checkpointRecord bump discard stale sessions per record instead of rejecting the whole medium. The async ripple of the old file read is reverted: api-proxy's listing column and subagent's cold identity read go back to synchronous cachedSnapshot.
75 lines
3.2 KiB
TypeScript
75 lines
3.2 KiB
TypeScript
/**
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* The projection-cache domain declaration: one `sessions` table keyed by
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* {@link SessionId}, each record the full projection checkpoint for one
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* session (`key → {ver, seq, val}` rows). The spec object is the single
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* source of the domain's identity, version, layout, and record schema; the
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* storage-domain routing decides the medium (the shipped composition's json
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* backend stores the domain `per-record`: one document per session under
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* `<root>/session_projcache/sessions/`, so a checkpoint write rewrites one
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* session's document instead of the whole unit).
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* @module @deepseek-ai/dsh-session-projection-cache/src/spec
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*/
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import { z } from 'zod'
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import { SessionId } from '@deepseek-ai/dsh-session'
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import { defineDomain, domainTable } from '@deepseek-ai/dsh-storage-domain'
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/**
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* One persisted checkpoint row (the RFC's `(sessionId, key, ver, seq, val)`
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* minus the two record keys). `val` is the unit's internal state — plain
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* JSON by the unit contract; `z.json()` enforces that at the durable
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* boundary. A row is never wrong, only possibly stale: `seq` says exactly
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* how stale, and a `ver` mismatch against the live unit's `stateVersion`
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* discards it at read time (never a migration).
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*/
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export const checkpointRow = z.object({
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ver: z.number().int().nonnegative(),
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seq: z.number().int().gte(-1),
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val: z.json(),
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})
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/**
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* The stored-log identity a record is bound to: the immutable header fields
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* that distinguish one session lifecycle from another under the same id. A
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* session id names a slot, not a lifecycle — a deleted-then-recreated id, or
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* a persistence root swapped under a surviving cache, would otherwise let an
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* old record pass every watermark check and seed state folded from an
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* unrelated log. Reads validate this against the live header (listing) or
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* the stored header (cold read) before accepting any record.
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*/
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export const checkpointIdentity = z.object({
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createdAt: z.number().int().nonnegative(),
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cwd: z.string().optional(),
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})
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/** The identity fields a record is bound to, inferred from {@link checkpointIdentity}. */
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export type CheckpointIdentity = z.infer<typeof checkpointIdentity>
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/**
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* One session's stored record: the log identity it was folded from plus its
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* checkpoint rows keyed by projection key. The whole record is replaced on
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* every write (whole-value discipline — the registry checkpoint is always
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* the complete per-session cut).
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*/
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export const checkpointRecord = z.object({
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identity: checkpointIdentity,
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rows: z.record(z.string(), checkpointRow),
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})
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/** One stored per-session checkpoint record, inferred from {@link checkpointRecord}. */
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export type CheckpointRecord = z.infer<typeof checkpointRecord>
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/**
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* The session-projcache domain spec. The `per-record` layout scopes version
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* bumps per session: after a bump, a stale session document is discarded on
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* open (cache semantics — a stale or unreadable cache costs a longer tail
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* replay, never a wrong value) while the rest of the domain stays usable,
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* instead of rejecting the whole medium.
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*/
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export const projectionCacheDomainSpec = defineDomain({
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name: 'session_projcache',
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version: 4,
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layout: 'per-record',
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tables: { sessions: domainTable<SessionId, CheckpointRecord>(checkpointRecord) },
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})
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