107 lines
4.9 KiB
TypeScript
107 lines
4.9 KiB
TypeScript
import { mkdtemp, rm, writeFile } from 'node:fs/promises'
|
|
import { tmpdir } from 'node:os'
|
|
import { join } from 'node:path'
|
|
import { afterEach, describe, expect, it } from 'vitest'
|
|
import type { Context } from 'cordis'
|
|
import { AgentId } from '@deepseek-ai/dsh-agent'
|
|
import { codingHarness, finalText, SYSTEM_PROMPT, waitForIdle } from './harness.ts'
|
|
|
|
/**
|
|
* The compaction smoke test: a real model runs a multi-step bash task with a
|
|
* deliberately tiny context window, so the auto-compaction listener fires
|
|
* MID-SESSION and summarizes the older history into a checkpoint. This is the
|
|
* first end-to-end exercise of the compaction seam (it is wired nowhere else),
|
|
* and the runaway-survival regression net — it proves a session that grows past
|
|
* the window keeps running rather than overflowing. Key-gated.
|
|
*
|
|
* Verifies the WORLD, not the agent's self-report: a compact/start…end pair
|
|
* landed in the real session log, the surface actually shrank (a replace node
|
|
* exists and shadowed older nodes), and the agent still produced a final answer
|
|
* after compaction (so the summarized history did not break the conversation).
|
|
*
|
|
* FIXME(compaction-snapshot): this key-gated e2e is the ONLY coverage of runaway
|
|
* compaction — there is no keyless full-transcript snapshot of it. dsh-llm-replay
|
|
* reconstructs one model call per (turn, step) from `assistant/chunk` events, but
|
|
* `summarize()` assembles its stream into a local BlockAssembler and appends no
|
|
* `assistant/chunk`, so the interleaved summarization call is unreplayable. A
|
|
* snapshot needs replay-harness work to serve that call; deferred as a follow-up.
|
|
*/
|
|
|
|
let workdir: string | undefined
|
|
let ctx: Context | undefined
|
|
|
|
afterEach(async () => {
|
|
await ctx?.fiber.dispose()
|
|
ctx = undefined
|
|
if (workdir !== undefined) await rm(workdir, { recursive: true, force: true })
|
|
workdir = undefined
|
|
})
|
|
|
|
describe.skipIf(!process.env.DEEPSEEK_API_KEY)('compaction: a long session compacts mid-flight and keeps running', () => {
|
|
it('summarizes older history into a checkpoint without breaking the task', async () => {
|
|
workdir = await mkdtemp(join(tmpdir(), 'dsh-compaction-'))
|
|
// A handful of files for the model to read, so multiple bash steps
|
|
// accumulate surface nodes (tool calls + results) and grow the history past
|
|
// the (deliberately tiny) window.
|
|
for (let i = 1; i <= 4; i++) {
|
|
await writeFile(join(workdir, `file${i}.txt`), `This is file number ${i}. `.repeat(50))
|
|
}
|
|
|
|
// Tiny window so a couple of steps crosses the threshold. The generation
|
|
// cap is deliberately larger than the final checkpoint because
|
|
// reasoning-capable APIs count reasoning tokens against the provider output
|
|
// budget even though those blocks are stripped before the checkpoint is
|
|
// stored.
|
|
ctx = await codingHarness(workdir, {
|
|
persona: SYSTEM_PROMPT,
|
|
compact: {
|
|
contextWindow: 2000,
|
|
thresholdRatio: 0.5,
|
|
retainTokens: 400,
|
|
summarizationModel: '',
|
|
maxTokens: 1024,
|
|
compactionRetries: 1,
|
|
},
|
|
persistenceRoot: join(workdir, '.sessions'),
|
|
})
|
|
const agent = ctx.agentLoop.create(AgentId('e2e-compaction'), { model: 'deepseek-v4-flash' })
|
|
|
|
agent.send([{
|
|
type: 'text',
|
|
text: 'Read file1.txt, file2.txt, file3.txt, and file4.txt one at a '
|
|
+ 'time using cat (a separate bash command for each). After reading all four, tell me how '
|
|
+ 'many files you read and the number mentioned in file1.txt.',
|
|
}])
|
|
await waitForIdle(ctx, agent)
|
|
|
|
const events = [...agent.session.events]
|
|
|
|
// A compaction ran: the start…end bracket landed in the real log.
|
|
const starts = events.filter(e => e.type === 'compact/start')
|
|
const ends = events.filter(e => e.type === 'compact/end')
|
|
expect(starts.length).toBeGreaterThan(0)
|
|
expect(ends.length).toBe(starts.length) // every start was released
|
|
|
|
// It succeeded at least once: a compact/summary provenance event and a
|
|
// replace-op user/message (the surface mutation) both landed.
|
|
const summaries = events.filter(e => e.type === 'compact/summary')
|
|
expect(summaries.length).toBeGreaterThan(0)
|
|
const replaceNode = events.find((e) => {
|
|
const se = e as unknown as { type: string; surfaceOp?: unknown }
|
|
return se.type === 'user/message' && typeof se.surfaceOp === 'object' && se.surfaceOp !== null
|
|
})
|
|
expect(replaceNode).toBeDefined()
|
|
|
|
// The summary shadowed real older nodes (the surface shrank vs. the raw
|
|
// message-producing event count).
|
|
const summaryData = summaries[0]!.data as { shadowedSeqs: number[] }
|
|
expect(summaryData.shadowedSeqs.length).toBeGreaterThan(0)
|
|
|
|
// The conversation survived compaction: the agent produced a final answer
|
|
// that reflects the work (it read four files).
|
|
const answer = finalText(events).toLowerCase()
|
|
expect(answer.length).toBeGreaterThan(0)
|
|
expect(answer).toMatch(/\b(4|four)\b/)
|
|
}, 240_000)
|
|
})
|