91 lines
3.6 KiB
TypeScript
91 lines
3.6 KiB
TypeScript
import { mkdtemp, rm, writeFile } from 'node:fs/promises'
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import { tmpdir } from 'node:os'
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import { join } from 'node:path'
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import { afterEach, describe, expect, it } from 'vitest'
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import type { Context } from 'cordis'
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import { AgentId } from '@deepseek-ai/dsh-agent'
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import { codingHarness, finalText, SYSTEM_PROMPT, waitForIdle } from './harness.ts'
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/**
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* Key-gated smoke for mid-session compaction. It verifies the compact event
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* pair, replacement of older surface nodes, and a final answer after compaction.
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*/
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// FIXME(compaction-snapshot): this is the only full compaction coverage because
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// replay cannot serve the summarizer's unlogged model call.
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let workdir: string | undefined
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let ctx: Context | undefined
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afterEach(async () => {
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await ctx?.fiber.dispose()
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ctx = undefined
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if (workdir !== undefined) await rm(workdir, { recursive: true, force: true })
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workdir = undefined
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})
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describe.skipIf(!process.env.DEEPSEEK_API_KEY)('compaction: a long session compacts mid-flight and keeps running', () => {
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it('summarizes older history into a checkpoint without breaking the task', async () => {
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workdir = await mkdtemp(join(tmpdir(), 'dsh-compaction-'))
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for (let i = 1; i <= 4; i++) {
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await writeFile(join(workdir, `file${i}.txt`), `This is file number ${i}. `.repeat(50))
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}
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// Reasoning tokens require a larger generation cap than the retained checkpoint.
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ctx = await codingHarness(workdir, {
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persona: SYSTEM_PROMPT,
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tokenMeter: {
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models: {
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'deepseek-v4-flash': { contextWindow: 2000 },
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},
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},
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compact: {
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models: {
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'deepseek-v4-flash': { thresholdRatio: 0.5, retainTokens: 400 },
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},
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summarizationModel: '',
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maxTokens: 1024,
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compactionRetries: 1,
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},
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persistenceRoot: join(workdir, '.sessions'),
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})
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const agent = ctx.agentLoop.create(AgentId('e2e-compaction'), { model: 'deepseek-v4-flash' })
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agent.send([{
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type: 'text',
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text: 'Read file1.txt, file2.txt, file3.txt, and file4.txt one at a '
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+ 'time using cat (a separate bash command for each). After reading all four, tell me how '
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+ 'many files you read and the number mentioned in file1.txt.',
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}])
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await waitForIdle(ctx, agent)
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const events = [...agent.session.events]
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// A compaction ran: the start…end bracket landed in the real log.
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const starts = events.filter(e => e.type === 'compact/start')
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const ends = events.filter(e => e.type === 'compact/end')
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expect(starts.length).toBeGreaterThan(0)
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expect(ends.length).toBe(starts.length) // every start was released
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// It succeeded at least once: a compact/summary provenance event and a
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// replace-op user/message (the surface mutation) both landed.
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const summaries = events.filter(e => e.type === 'compact/summary')
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expect(summaries.length).toBeGreaterThan(0)
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const replaceNode = events.find((e) => {
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const se = e as unknown as { type: string; surfaceOp?: unknown }
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return se.type === 'user/message' && typeof se.surfaceOp === 'object' && se.surfaceOp !== null
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})
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expect(replaceNode).toBeDefined()
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// The summary shadowed real older nodes (the surface shrank vs. the raw
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// message-producing event count).
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const summaryData = summaries[0]!.data as { shadowedSeqs: number[] }
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expect(summaryData.shadowedSeqs.length).toBeGreaterThan(0)
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// The conversation survived compaction: the agent produced a final answer
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// that reflects the work (it read four files).
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const answer = finalText(events).toLowerCase()
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expect(answer.length).toBeGreaterThan(0)
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expect(answer).toMatch(/\b(4|four)\b/)
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}, 240_000)
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})
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