53 lines
2.5 KiB
TypeScript
53 lines
2.5 KiB
TypeScript
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/**
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* Drift trap for the compaction-checkpoint recognition rule.
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*
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* `TranscriptAdapter` restates the compaction seam's checkpoint source as a
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* local literal because it cannot import `dsh-compact` in any form: a VALUE
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* import fails the client purity gate, and a TYPE-ONLY import fails typecheck —
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* `dsh-compact`'s root reaches `dsh-session`'s root, whose cordis `Context`
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* merge declares the HOST `sessions: SessionStore` against the client program's
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* `sessions: ISessions` (`TS2717`). This spec runs in the client TEST program,
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* which does not carry that collision, and it is the only thing keeping the two
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* implementations from drifting: it drives the adapter with a checkpoint built
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* from the canonical `COMPACT_CHECKPOINT_SOURCE` itself, so renaming the seam's
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* plugin fails HERE instead of silently deleting every compaction marker from
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* the web transcript.
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*/
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import { COMPACT_CHECKPOINT_SOURCE, isCompactCheckpointSource } from '@deepseek-ai/dsh-compact'
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import { createUserMessage } from '@deepseek-ai/dsh-llm'
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import { describe, expect, it } from 'vitest'
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import type { SessionEvent } from '@deepseek-ai/dsh-session/types'
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import { TranscriptAdapter } from '../src/client/sessions/transcript-adapter.ts'
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/** A replacement user message stamped with the seam's own canonical source. */
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function canonicalCheckpoint(seq: number): SessionEvent {
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return {
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type: 'user/message',
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seq,
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time: 1_700_000_000_000 + seq,
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surfaceOp: { op: 'replace', start: 0, end: 0 },
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sourceEventSeqs: [0],
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data: createUserMessage({
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content: [{ type: 'text', text: '<context_checkpoint>model only</context_checkpoint>' }],
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source: COMPACT_CHECKPOINT_SOURCE,
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}),
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} as unknown as SessionEvent
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}
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describe('compaction checkpoint recognition', () => {
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it('recognizes a checkpoint carrying the seam-canonical source', () => {
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const adapter = new TranscriptAdapter()
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adapter.reset([canonicalCheckpoint(1)])
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expect(adapter.nodes()).toEqual([{ kind: 'compaction', seq: 1, time: 1_700_000_000_001, summary: null }])
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})
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it('agrees with the seam s own predicate on the source it recognizes', () => {
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// Both sides answer the same question about the same value: if the seam
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// renames its plugin, this equality is what breaks.
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const checkpoint = canonicalCheckpoint(1)
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expect(checkpoint.type === 'user/message' && isCompactCheckpointSource(checkpoint.data.source)).toBe(true)
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expect(COMPACT_CHECKPOINT_SOURCE).toEqual({ kind: 'plugin', plugin: 'compact' })
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})
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})
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