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refactor: narrow compaction surface

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This commit is contained in:
Tianyi Cui
2026-07-14 01:24:20 +08:00
parent f95a411b0a
commit d7de8a8d13
11 changed files with 95 additions and 148 deletions
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23
packages/compact/compact/tests/compact.spec.ts
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@@ -27,28 +27,24 @@ class StubCompactService extends CompactService {
}
override async compactRegion(
session: Session,
start: number,
end: number,
_agent: CompactAgentContext,
agent: CompactAgentContext,
signal?: AbortSignal,
): Promise<CompactionResult> {
this.lastSignal = signal
const session = agent.session
// Minimal stub honoring the lock + log-only event contract.
const startEvent = session.append('compact/start', { turn: 0 })
const summaryEvent = session.append('compact/summary', {
session.append('compact/start', { turn: 0 })
session.append('compact/summary', {
summary: [{ type: 'text', text: 'stub' }],
shadowedRange: { start, end },
shadowedSeqs: [],
shadowedTokenCount: 0,
model: 'stub',
})
const endEvent = session.append('compact/end', { turn: 0 })
session.append('compact/end', { turn: 0 })
return {
startSeq: startEvent.seq,
summarySeq: summaryEvent.seq,
endSeq: endEvent.seq,
summary: [{ type: 'text', text: 'stub' }],
shadowedRange: { start, end },
shadowedSeqs: [],
shadowedTokenCount: 0,
@@ -88,7 +84,7 @@ describe('CompactService seam', () => {
const svc = new StubCompactService(ctx)
const session = new Session(SessionId('s'))
const result = await svc.compactRegion(session, 0, 0, stubAgent(session, 'm'))
const result = await svc.compactRegion(0, 0, stubAgent(session, 'm'))
const startEvent = session.events.find(e => e.type === 'compact/start')
expect(startEvent).toBeDefined()
@@ -96,8 +92,9 @@ describe('CompactService seam', () => {
// verify the runtime value is absent.
const raw = startEvent as unknown as { surfaceOp?: unknown }
expect(raw.surfaceOp).toBeUndefined()
expect(result.summarySeq).toBeGreaterThan(result.startSeq)
expect(result.endSeq).toBeGreaterThan(result.summarySeq)
expect(result.shadowedRange).toEqual({ start: 0, end: 0 })
expect(session.events.filter(e => e.type.startsWith('compact/')).map(e => e.type))
.toEqual(['compact/start', 'compact/summary', 'compact/end'])
})
it('threads the cancellation signal through to the backend', async () => {
@@ -106,7 +103,7 @@ describe('CompactService seam', () => {
const session = new Session(SessionId('s'))
const controller = new AbortController()
await svc.compactRegion(session, 0, 0, stubAgent(session, 'm'), controller.signal)
await svc.compactRegion(0, 0, stubAgent(session, 'm'), controller.signal)
expect(svc.lastSignal).toBe(controller.signal)
await svc.compactIfNeeded(stubAgent(session), '', [], controller.signal)