1135 lines
43 KiB
TypeScript
1135 lines
43 KiB
TypeScript
import { describe, expect, it, vi } from 'vitest'
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import { Context } from 'cordis'
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import BasicCompactService, {
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resolveConfig,
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resolveModelConfig,
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} from '@deepseek-ai/dsh-compact-basic'
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import type { BasicCompactConfig } from '@deepseek-ai/dsh-compact-basic'
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import { selectCompactableRange } from '@deepseek-ai/dsh-compact-basic/src/region.ts'
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import { toolPairingBalancedAfter, toolPairingBalancedBefore } from '@deepseek-ai/dsh-compact'
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import type { CompactionResult } from '@deepseek-ai/dsh-compact'
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import LlmService, { CallId, CONTEXT_WINDOW_EXCEEDED_CODE, LlmAdapter } from '@deepseek-ai/dsh-llm'
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import type { ContentBlock, GenerateOptions, StreamChunk } from '@deepseek-ai/dsh-llm'
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import { Session, SessionId } from '@deepseek-ai/dsh-session'
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import TokenMeterService, {
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TOKEN_METER_MODEL_UNCONFIGURED,
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TokenMeterError,
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} from '@deepseek-ai/dsh-token-meter'
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import type { Agent } from '@deepseek-ai/dsh-agent'
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const SIGNAL = new AbortController().signal
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const MODEL = 'test-model'
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function createContext(
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models: Record<string, { contextWindow?: number; charsPerToken?: number }> = {
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[MODEL]: { contextWindow: 100, charsPerToken: 1_000 },
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},
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): Context {
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const ctx = new Context()
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void new TokenMeterService(ctx, { models })
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return ctx
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}
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function agent(session: Session, model?: string): Agent {
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return { session, options: model === undefined ? {} : { model } } as Agent
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}
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/** Closed two-message turns followed by one open turn for durable compaction events. */
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function conversation(turns = 4, text = 'fixture'): Session {
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const session = new Session(SessionId(`conversation-${turns}`))
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for (let turn = 1; turn <= turns; turn += 1) {
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session.append('turn/start', { turn, trigger: { kind: 'message', source: { kind: 'user' } } })
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session.append('user/message', {
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content: [{ type: 'text', text: `${text} user ${turn}` }],
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source: { kind: 'user' },
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}, { surfaceOp: 'append' })
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session.append('step/start', { turn, step: 1 })
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if (turn === 1) {
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session.append('request/header', {
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header: { config: { model: MODEL } },
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reason: 'initial',
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})
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}
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session.append('assistant/message', {
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turn,
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step: 1,
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content: [{ type: 'text', text: `${text} assistant ${turn}` }],
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}, { surfaceOp: 'append' })
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session.append('step/end', { turn, step: 1 })
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session.append('turn/end', { turn, reason: { kind: 'completed' } })
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}
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session.append('turn/start', {
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turn: turns + 1,
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trigger: { kind: 'message', source: { kind: 'user' } },
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})
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return session
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}
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function toolConversation(): Session {
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const session = new Session(SessionId('tools'))
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for (let turn = 1; turn <= 3; turn += 1) {
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const callId = CallId(`call-${turn}`)
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session.append('turn/start', { turn, trigger: { kind: 'message', source: { kind: 'user' } } })
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session.append('user/message', {
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content: [{ type: 'text', text: `request ${turn} `.repeat(300) }],
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source: { kind: 'user' },
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}, { surfaceOp: 'append' })
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session.append('step/start', { turn, step: 1 })
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if (turn === 1) {
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session.append('request/header', {
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header: { config: { model: MODEL } },
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reason: 'initial',
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})
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}
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session.append('assistant/message', {
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turn,
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step: 1,
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content: [
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{ type: 'text', text: `calling ${turn} `.repeat(300) },
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{ type: 'tool-call', id: callId, name: 'read', arguments: '{}' },
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],
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}, { surfaceOp: 'append' })
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session.append('tool/call', { turn, step: 1, callId, name: 'read', arguments: '{}' })
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session.append('tool/result', {
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turn,
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step: 1,
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callId,
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content: [{ type: 'text', text: `result ${turn} `.repeat(300) }],
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isError: false,
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}, { surfaceOp: 'append' })
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session.append('step/end', { turn, step: 1 })
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session.append('turn/end', { turn, reason: { kind: 'completed' } })
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}
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session.append('turn/start', { turn: 4, trigger: { kind: 'message', source: { kind: 'user' } } })
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return session
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}
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class TestCompactService extends BasicCompactService {
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summary: ContentBlock[] = [{ type: 'text', text: 'small checkpoint' }]
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summaryModel = 'summary-model'
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error: unknown
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mutateDuringSummary: (() => void) | undefined
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calls: Array<{ text: string; signal: AbortSignal | undefined }> = []
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override async summarize(
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text: string,
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_agent: Agent,
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signal?: AbortSignal,
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): Promise<{ summary: ContentBlock[]; model: string; maxTokens?: number }> {
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this.calls.push({ text, signal })
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this.mutateDuringSummary?.()
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if (this.error !== undefined) throw this.error
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return { summary: this.summary, model: this.summaryModel, maxTokens: 123 }
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}
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}
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function service(
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config: BasicCompactConfig = { auto: false },
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ctx = createContext(),
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): TestCompactService {
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return new TestCompactService(ctx, config)
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}
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async function compactIfNeeded(
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compact: BasicCompactService,
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session: Session,
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trigger: 'pressure' | 'context-overflow' = 'pressure',
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model: string | undefined = MODEL,
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): Promise<CompactionResult | null> {
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return compact.compactIfNeeded(agent(session, model), trigger, SIGNAL)
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}
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describe('compact configuration and defaults', () => {
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it('uses low-friction common and per-profile defaults', () => {
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const ctx = createContext({
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[MODEL]: { contextWindow: 100, charsPerToken: 1_000 },
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large: { contextWindow: 1_000, charsPerToken: 4 },
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})
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const resolved = resolveConfig({}, ctx.tokenMeter)
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expect(resolved).toEqual({
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models: {},
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summarizationModel: '',
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maxTokens: 8192,
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compactionRetries: 1,
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maxOverflowRetries: 1,
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auto: true,
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})
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expect(resolveModelConfig(resolved, ctx.tokenMeter.resolve(MODEL))).toEqual({
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model: MODEL,
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contextWindow: 100,
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thresholdRatio: 0.8,
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retainTokens: 16,
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})
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expect(resolveModelConfig(resolved, ctx.tokenMeter.resolve('large')).retainTokens).toBe(160)
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expect(Object.isFrozen(resolved)).toBe(true)
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})
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it('merges threshold and retention overrides field-wise', () => {
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const ctx = createContext()
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const thresholdOnly = resolveConfig({
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models: { [MODEL]: { thresholdRatio: 0.5 } },
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}, ctx.tokenMeter)
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expect(resolveModelConfig(thresholdOnly, ctx.tokenMeter.resolve(MODEL))).toMatchObject({
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thresholdRatio: 0.5,
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retainTokens: 16,
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})
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const retentionOnly = resolveConfig({
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models: { [MODEL]: { retainTokens: 7 } },
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}, ctx.tokenMeter)
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expect(resolveModelConfig(retentionOnly, ctx.tokenMeter.resolve(MODEL))).toMatchObject({
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thresholdRatio: 0.8,
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retainTokens: 7,
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})
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})
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it('validates common values and model policy invariants', () => {
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const ctx = createContext()
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const bad = [
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[{ maxTokens: 0 }, /maxTokens/],
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[{ compactionRetries: -1 }, /compactionRetries/],
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[{ maxOverflowRetries: -1 }, /maxOverflowRetries/],
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[{ auto: 'yes' }, /auto must be a boolean/],
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[{ summarizationModel: 1 }, /summarizationModel must be a string/],
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[{ models: null }, /models must be an object/],
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[{ models: { [MODEL]: null } }, /must be an object/],
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[{ models: { [MODEL]: { thresholdRatio: 0 } } }, /number in \(0, 1\]/],
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[{ models: { [MODEL]: { thresholdRatio: 1.1 } } }, /number in \(0, 1\]/],
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[{ models: { [MODEL]: { retainTokens: -1 } } }, /non-negative integer/],
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[{ models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 50 } } }, /less than threshold/],
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] as Array<[unknown, RegExp]>
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for (const [config, pattern] of bad) {
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expect(() => resolveConfig(config as BasicCompactConfig, ctx.tokenMeter)).toThrow(pattern)
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}
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})
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it('rejects an override for an unknown meter profile with the exact typed error', () => {
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const ctx = createContext()
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expect(() => resolveConfig({ models: { missing: { retainTokens: 1 } } }, ctx.tokenMeter))
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.toThrow(expect.objectContaining({
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code: TOKEN_METER_MODEL_UNCONFIGURED,
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model: 'missing',
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}))
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})
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})
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describe('pressure measurement and retention', () => {
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const compactConfig: BasicCompactConfig = {
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auto: false,
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models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
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}
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it('skips when no durable routed model exists instead of using AgentOptions fallback', async () => {
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const compact = service(compactConfig)
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const session = new Session(SessionId('headerless'))
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session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
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await expect(compact.compactIfNeeded(agent(session, MODEL), 'pressure', SIGNAL))
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.resolves.toBeNull()
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expect(compact.calls).toHaveLength(0)
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})
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it('throws for a named unconfigured model instead of swallowing it', async () => {
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const compact = service(compactConfig)
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const session = conversation()
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session.append('request/header', {
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header: { config: { model: 'missing' } },
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reason: 'resume',
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})
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await expect(compactIfNeeded(compact, session))
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.rejects.toMatchObject({ code: TOKEN_METER_MODEL_UNCONFIGURED, model: 'missing' })
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})
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it('declines forced overflow when the whole surface is one indivisible tool pair', async () => {
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const compact = service(compactConfig)
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const session = new Session(SessionId('single-tool-pair'))
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const callId = CallId('single-call')
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session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
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session.append('step/start', { turn: 1, step: 1 })
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session.append('request/header', {
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header: { config: { model: MODEL } },
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reason: 'initial',
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})
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session.append('assistant/message', {
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turn: 1,
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step: 1,
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content: [{ type: 'tool-call', id: callId, name: 'read', arguments: '{}' }],
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}, { surfaceOp: 'append' })
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session.append('tool/call', { turn: 1, step: 1, callId, name: 'read', arguments: '{}' })
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session.append('tool/result', {
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turn: 1,
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step: 1,
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callId,
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content: [{ type: 'text', text: 'result' }],
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isError: false,
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}, { surfaceOp: 'append' })
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session.append('step/end', { turn: 1, step: 1 })
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const generation = session.surface.replaceGeneration
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await expect(compactIfNeeded(compact, session, 'context-overflow')).resolves.toBeNull()
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expect(session.surface.replaceGeneration).toBe(generation)
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expect(session.events.some(event => event.type === 'compact/start')).toBe(false)
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})
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it('does nothing below threshold and compacts a priced head above threshold', async () => {
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const compact = service(compactConfig)
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expect(await compactIfNeeded(compact, conversation(2))).toBeNull()
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const session = conversation(4)
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const result = await compactIfNeeded(compact, session)
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expect(result).not.toBeNull()
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expect(result?.shadowedSeqs.length).toBeGreaterThan(2)
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expect(session.surface.nodes.length).toBeLessThan(8)
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})
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it('counts the durable routed request envelope without putting its prefix on the surface', async () => {
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const compact = service({
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auto: false,
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models: { [MODEL]: { thresholdRatio: 0.7, retainTokens: 9 } },
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})
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const session = conversation(2, 'x'.repeat(2_000))
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expect(await compactIfNeeded(compact, session)).toBeNull()
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const prefix = [{ role: 'user' as const, content: [{ type: 'text' as const, text: 'p'.repeat(10_000) }] }]
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session.append('request/header', {
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header: {
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config: { model: MODEL },
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system: 's'.repeat(5_000),
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messagePrefix: prefix,
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},
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reason: 'resume',
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})
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const result = await compactIfNeeded(compact, session)
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expect(result).not.toBeNull()
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expect(prefix).toHaveLength(1)
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expect(session.events.some(event => event.type === 'context/message')).toBe(false)
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})
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it('uses the latest logged routed model instead of AgentOptions.model', async () => {
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const ctx = createContext({
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actual: { contextWindow: 100, charsPerToken: 1_000 },
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fallback: { contextWindow: 10_000, charsPerToken: 1_000 },
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})
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const compact = service({
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auto: false,
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models: { actual: { thresholdRatio: 0.5, retainTokens: 18 } },
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}, ctx)
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const session = conversation(4)
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session.append('request/header', {
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header: { config: { model: 'actual' } },
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reason: 'initial',
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})
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const result = await compactIfNeeded(compact, session, 'pressure', 'fallback')
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expect(result).not.toBeNull()
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})
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it('declines when envelope pressure is high but the surface has no compactable range', async () => {
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const compact = service(compactConfig)
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const empty = new Session(SessionId('empty'))
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empty.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
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empty.append('request/header', {
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header: { config: { model: MODEL }, system: 'x'.repeat(100_000) },
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reason: 'initial',
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})
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expect(await compactIfNeeded(compact, empty)).toBeNull()
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const retained = conversation(1)
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retained.append('request/header', {
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header: { config: { model: MODEL }, system: 'x'.repeat(100_000) },
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reason: 'resume',
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})
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expect(await compactIfNeeded(compact, retained)).toBeNull()
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})
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it('detects scalar/surface revision disagreement', async () => {
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const ctx = createContext()
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const meter = ctx.tokenMeter.resolve(MODEL)
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const original = meter.measureSurface.bind(meter)
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vi.spyOn(meter, 'measureSurface').mockImplementation((session) => {
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const measurement = original(session)
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return { ...measurement, logRevision: measurement.logRevision - 1 }
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})
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const compact = service(compactConfig, ctx)
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await expect(compactIfNeeded(compact, conversation(4))).rejects.toThrow(/revision/)
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})
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it('bounds retries when a shrinking checkpoint remains above threshold', async () => {
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const compact = service({
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auto: false,
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compactionRetries: 0,
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models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
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})
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compact.summary = Array.from({ length: 7 }, (_, index) => ({
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type: 'text',
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text: `summary ${index}`,
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}))
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await expect(compactIfNeeded(compact, conversation(4)))
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.rejects.toThrow(/still above threshold after 1 compaction attempts/)
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})
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it('rounds a retention cut head-ward to preserve tool-call/result pairing', async () => {
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const compact = service({
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auto: false,
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models: { [MODEL]: { thresholdRatio: 0.8, retainTokens: 8 } },
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})
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const session = toolConversation()
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const result = await compactIfNeeded(compact, session)
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expect(result).not.toBeNull()
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const messages = session.deriveMessages()
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const calls = new Set<string>()
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for (const message of messages) {
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for (const block of message.content) {
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if (block.type === 'tool-call') calls.add(block.id)
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if (block.type === 'tool-result') expect(calls.has(block.toolCallId)).toBe(true)
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}
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}
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})
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it('rejects a priced surface that is not the current positional surface', () => {
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const ctx = createContext()
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const session = conversation(2)
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const priced = ctx.tokenMeter.resolve(MODEL).measureSurface(session)
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expect(() => selectCompactableRange(session, {
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...priced,
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nodes: priced.nodes.slice(1),
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}, 1)).toThrow(/does not match/)
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})
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it('declines when rounding a cut would consume the only tool pair', () => {
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const ctx = createContext()
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const session = new Session(SessionId('one-tool-pair'))
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const callId = CallId('only')
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session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
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session.append('step/start', { turn: 1, step: 1 })
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session.append('assistant/message', {
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turn: 1,
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step: 1,
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content: [{ type: 'tool-call', id: callId, name: 'read', arguments: '{}' }],
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}, { surfaceOp: 'append' })
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session.append('tool/call', { turn: 1, step: 1, callId, name: 'read', arguments: '{}' })
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session.append('tool/result', {
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turn: 1,
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step: 1,
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callId,
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content: [{ type: 'text', text: 'result' }],
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isError: false,
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}, { surfaceOp: 'append' })
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session.append('step/end', { turn: 1, step: 1 })
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const priced = ctx.tokenMeter.resolve(MODEL).measureSurface(session)
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expect(selectCompactableRange(session, priced, 1)).toBeNull()
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})
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})
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describe('compaction region transaction', () => {
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it('rejects an agent that does not own the exact target session before mutation', async () => {
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const compact = service()
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const target = conversation(2)
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const owner = conversation(1)
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const targetEvents = [...target.events]
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const ownerEvents = [...owner.events]
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const nodes = target.surface.nodes
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await expect(compact.compactRegion(
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target,
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nodes[0]!.seq,
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nodes[1]!.seq,
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agent(owner),
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)).rejects.toThrow('compactRegion: agent.session must be the exact target session')
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expect(target.events).toEqual(targetEvents)
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expect(owner.events).toEqual(ownerEvents)
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expect(compact.calls).toEqual([])
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})
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it('lands a framed, replayable checkpoint with exact pricing provenance', async () => {
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const compact = service()
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const session = conversation(3)
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const before = session.surface.nodes
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const result = await compact.compactRegion(
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session,
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before[0]!.seq,
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before[3]!.seq,
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agent(session, MODEL),
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SIGNAL,
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)
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expect(result.shadowedSeqs).toEqual(before.slice(0, 4).map(node => node.seq))
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expect(result.shadowedTokenCount).toBeGreaterThan(0)
|
|
expect(compact.calls[0]).toMatchObject({ signal: SIGNAL })
|
|
expect(compact.calls[0]?.text).toContain('fixture user 1')
|
|
const summary = session.events.findLast(event => event.type === 'compact/summary')
|
|
expect(summary?.data).toMatchObject({
|
|
shadowedSeqs: result.shadowedSeqs,
|
|
shadowedTokenCount: result.shadowedTokenCount,
|
|
model: 'summary-model',
|
|
maxTokens: 123,
|
|
})
|
|
const head = session.deriveMessages()[0]!
|
|
expect(head.content[0]?.type).toBe('text')
|
|
expect(head.content[0]?.type === 'text' ? head.content[0].text : '').toContain('<compacted-summary>')
|
|
expect(head.content.at(-1)).toEqual({ type: 'text', text: '</compacted-summary>' })
|
|
|
|
const replay = new Session(SessionId('replay'), [...session.events])
|
|
expect(replay.deriveMessages()).toEqual(session.deriveMessages())
|
|
})
|
|
|
|
it.each([
|
|
['start missing', 9_001, undefined, /start seq 9001 not found/],
|
|
['end missing', undefined, 9_002, /end seq 9002 not found/],
|
|
])('rejects %s', async (_label, startOverride, endOverride, pattern) => {
|
|
const compact = service()
|
|
const session = conversation(2)
|
|
const nodes = session.surface.nodes
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
startOverride ?? nodes[0]!.seq,
|
|
endOverride ?? nodes[1]!.seq,
|
|
agent(session, MODEL),
|
|
)).rejects.toThrow(pattern)
|
|
})
|
|
|
|
it('rejects reversed and tool-unbalanced positional boundaries', async () => {
|
|
const compact = service()
|
|
const plain = conversation(2)
|
|
const nodes = plain.surface.nodes
|
|
await expect(compact.compactRegion(
|
|
plain,
|
|
nodes[2]!.seq,
|
|
nodes[1]!.seq,
|
|
agent(plain, MODEL),
|
|
)).rejects.toThrow(/is after end/)
|
|
|
|
const tools = toolConversation()
|
|
const toolNodes = tools.surface.nodes
|
|
await expect(compact.compactRegion(
|
|
tools,
|
|
toolNodes[2]!.seq,
|
|
toolNodes[4]!.seq,
|
|
agent(tools, MODEL),
|
|
)).rejects.toThrow(/start seq .* not a balanced boundary/)
|
|
await expect(compact.compactRegion(
|
|
tools,
|
|
toolNodes[0]!.seq,
|
|
toolNodes[1]!.seq,
|
|
agent(tools, MODEL),
|
|
)).rejects.toThrow(/end seq .* not a balanced boundary/)
|
|
})
|
|
|
|
it('requires an open turn and an idle compaction bracket', async () => {
|
|
const compact = service()
|
|
const closed = conversation(1)
|
|
closed.append('turn/end', { turn: 2, reason: { kind: 'completed' } })
|
|
const nodes = closed.surface.nodes
|
|
await expect(compact.compactRegion(
|
|
closed,
|
|
nodes[0]!.seq,
|
|
nodes[1]!.seq,
|
|
agent(closed, MODEL),
|
|
)).rejects.toThrow(/no open turn/)
|
|
|
|
const locked = conversation(1)
|
|
locked.append('compact/start', { turn: 2 })
|
|
const lockedNodes = locked.surface.nodes
|
|
await expect(compact.compactRegion(
|
|
locked,
|
|
lockedNodes[0]!.seq,
|
|
lockedNodes[1]!.seq,
|
|
agent(locked, MODEL),
|
|
)).rejects.toThrow(/already in progress/)
|
|
})
|
|
|
|
it('rejects a session with no turn boundary at all', async () => {
|
|
const compact = service()
|
|
const session = new Session(SessionId('turnless'))
|
|
session.append('user/message', {
|
|
content: [{ type: 'text', text: 'orphan' }],
|
|
source: { kind: 'user' },
|
|
}, { surfaceOp: 'append' })
|
|
const node = session.surface.nodes[0]!
|
|
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
node.seq,
|
|
node.seq,
|
|
agent(session, MODEL),
|
|
)).rejects.toThrow(/no open turn/)
|
|
})
|
|
|
|
it('rejects a meter snapshot that changed before summarization began', async () => {
|
|
const ctx = createContext()
|
|
const meter = ctx.tokenMeter.resolve(MODEL)
|
|
const original = meter.measureSurface.bind(meter)
|
|
vi.spyOn(meter, 'measureSurface').mockImplementationOnce((session) => {
|
|
const measurement = original(session)
|
|
return { ...measurement, nodes: measurement.nodes.slice(1) }
|
|
})
|
|
const compact = service({ auto: false }, ctx)
|
|
const session = conversation(2)
|
|
const nodes = session.surface.nodes
|
|
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
nodes[0]!.seq,
|
|
nodes[2]!.seq,
|
|
agent(session, MODEL),
|
|
)).rejects.toThrow(/selected surface changed/)
|
|
})
|
|
|
|
it('records summarizer failures without mutating the surface', async () => {
|
|
const compact = service()
|
|
compact.error = new Error('summary unavailable')
|
|
const session = conversation(2)
|
|
const before = session.surface.nodes
|
|
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
before[0]!.seq,
|
|
before[2]!.seq,
|
|
agent(session, MODEL),
|
|
)).rejects.toThrow('summary unavailable')
|
|
expect(session.surface.nodes).toEqual(before)
|
|
expect(session.events.findLast(event => event.type === 'compact/end')?.data)
|
|
.toMatchObject({ error: 'summary unavailable' })
|
|
})
|
|
|
|
it('stringifies non-Error failures in the durable end bracket', async () => {
|
|
const compact = service()
|
|
compact.error = 'plain failure'
|
|
const session = conversation(2)
|
|
const nodes = session.surface.nodes
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
nodes[0]!.seq,
|
|
nodes[2]!.seq,
|
|
agent(session, MODEL),
|
|
)).rejects.toBe('plain failure')
|
|
expect(session.events.findLast(event => event.type === 'compact/end')?.data)
|
|
.toMatchObject({ error: 'plain failure' })
|
|
})
|
|
|
|
it('rejects concurrent durable appends before committing the replacement', async () => {
|
|
const compact = service()
|
|
const session = conversation(2)
|
|
compact.mutateDuringSummary = () => {
|
|
session.append('request/header', {
|
|
header: { config: { model: MODEL } },
|
|
reason: 'initial',
|
|
})
|
|
}
|
|
const nodes = session.surface.nodes
|
|
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
nodes[0]!.seq,
|
|
nodes[2]!.seq,
|
|
agent(session, MODEL),
|
|
)).rejects.toThrow(/session log changed/)
|
|
expect(session.events.some(event => event.type === 'compact/summary')).toBe(false)
|
|
})
|
|
|
|
it('rejects a non-shrinking framed summary under the conversation meter', async () => {
|
|
const compact = service()
|
|
compact.summary = Array.from({ length: 20 }, (_, index) => ({
|
|
type: 'text',
|
|
text: `verbose ${index}`,
|
|
}))
|
|
const session = conversation(2)
|
|
const nodes = session.surface.nodes
|
|
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
nodes[0]!.seq,
|
|
nodes[2]!.seq,
|
|
agent(session, MODEL),
|
|
)).rejects.toThrow(/summary is not smaller/)
|
|
expect(session.events.some(event => event.type === 'compact/summary')).toBe(false)
|
|
})
|
|
|
|
it('requires a conversation model for pricing', async () => {
|
|
const compact = service()
|
|
const session = new Session(SessionId('model-less-region'))
|
|
session.append('turn/start', { turn: 1, trigger: { kind: 'message', source: { kind: 'user' } } })
|
|
session.append('user/message', {
|
|
content: [{ type: 'text', text: 'history' }],
|
|
source: { kind: 'user' },
|
|
}, { surfaceOp: 'append' })
|
|
session.append('step/start', { turn: 1, step: 1 })
|
|
session.append('assistant/message', {
|
|
turn: 1,
|
|
step: 1,
|
|
content: [{ type: 'text', text: 'answer' }],
|
|
}, { surfaceOp: 'append' })
|
|
session.append('step/end', { turn: 1, step: 1 })
|
|
const nodes = session.surface.nodes
|
|
await expect(compact.compactRegion(
|
|
session,
|
|
nodes[0]!.seq,
|
|
nodes[1]!.seq,
|
|
agent(session),
|
|
)).rejects.toThrow(/no routed or configured conversation model/)
|
|
})
|
|
})
|
|
|
|
class ScriptedAdapter extends LlmAdapter {
|
|
lastOptions: GenerateOptions | undefined
|
|
|
|
constructor(
|
|
private readonly blocks: readonly ContentBlock[],
|
|
private readonly finish: (StreamChunk & { type: 'finish' })['reason'] = { kind: 'stop' },
|
|
) {
|
|
super()
|
|
}
|
|
|
|
override async * stream(options: GenerateOptions): AsyncIterable<StreamChunk> {
|
|
this.lastOptions = options
|
|
for (const [index, block] of this.blocks.entries()) {
|
|
yield { type: 'block-start', index, blockType: block.type }
|
|
if (block.type === 'text') {
|
|
yield { type: 'text-delta', index, text: block.text }
|
|
} else if (block.type === 'reasoning') {
|
|
yield { type: 'reasoning-delta', index, text: block.text }
|
|
} else {
|
|
yield { type: 'block-end', index, block }
|
|
}
|
|
}
|
|
yield { type: 'finish', reason: this.finish }
|
|
}
|
|
}
|
|
|
|
async function summarizerHarness(
|
|
blocks: readonly ContentBlock[],
|
|
finish?: (StreamChunk & { type: 'finish' })['reason'],
|
|
model = MODEL,
|
|
config: BasicCompactConfig = { auto: false },
|
|
): Promise<{ ctx: Context; adapter: ScriptedAdapter; compact: BasicCompactService }> {
|
|
const ctx = new Context()
|
|
await ctx.plugin(LlmService)
|
|
void new TokenMeterService(ctx, { models: { [model]: { contextWindow: 100 } } })
|
|
const adapter = new ScriptedAdapter(blocks, finish)
|
|
ctx.llm.registerAdapter([model], adapter)
|
|
const compact = new BasicCompactService(ctx, config)
|
|
return { ctx, adapter, compact }
|
|
}
|
|
|
|
describe('default one-shot summarizer', () => {
|
|
it('uses configured model/default cap, forwards cancellation, and keeps only safe text', async () => {
|
|
const { adapter, compact } = await summarizerHarness([
|
|
{ type: 'reasoning', text: 'private' },
|
|
{ type: 'text', text: 'public summary' },
|
|
{ type: 'tool-call', id: CallId('unexpected'), name: 'x', arguments: '{}' },
|
|
], undefined, MODEL, {
|
|
auto: false,
|
|
summarizationModel: MODEL,
|
|
maxTokens: 321,
|
|
})
|
|
const session = conversation(1)
|
|
const output = await compact.summarize('transcript', agent(session, 'fallback'), SIGNAL)
|
|
|
|
expect(output).toEqual({
|
|
summary: [{ type: 'text', text: 'public summary' }],
|
|
model: MODEL,
|
|
maxTokens: 321,
|
|
})
|
|
expect(adapter.lastOptions).toMatchObject({
|
|
model: MODEL,
|
|
maxTokens: 321,
|
|
signal: SIGNAL,
|
|
sessionId: session.id,
|
|
})
|
|
expect(adapter.lastOptions?.system).toContain('## Primary Request and Intent')
|
|
})
|
|
|
|
it('resolves latest routed model before AgentOptions.model', async () => {
|
|
const { adapter, compact } = await summarizerHarness([{ type: 'text', text: 'summary' }], undefined, 'routed')
|
|
const session = conversation(1)
|
|
session.append('request/header', {
|
|
header: { config: { model: 'routed' } },
|
|
reason: 'initial',
|
|
})
|
|
const output = await compact.summarize('history', agent(session, 'fallback'))
|
|
expect(output.model).toBe('routed')
|
|
expect(adapter.lastOptions?.model).toBe('routed')
|
|
})
|
|
|
|
it('records the model actually dispatched after one-shot stream routing', async () => {
|
|
const { ctx, compact } = await summarizerHarness([{ type: 'text', text: 'unused' }])
|
|
const routedAdapter = new ScriptedAdapter([{ type: 'text', text: 'routed summary' }])
|
|
ctx.llm.registerAdapter(['routed-summary-model'], routedAdapter)
|
|
ctx.on('llm/stream', (options, next) => {
|
|
options.model = 'routed-summary-model'
|
|
return next()
|
|
})
|
|
|
|
const session = conversation(3, 'large history '.repeat(500))
|
|
const nodes = session.surface.nodes
|
|
await compact.compactRegion(session, nodes[0]!.seq, nodes[3]!.seq, agent(session, MODEL), SIGNAL)
|
|
expect(session.events.findLast(event => event.type === 'compact/summary')?.data).toMatchObject({
|
|
summary: [{ type: 'text', text: 'routed summary' }],
|
|
model: 'routed-summary-model',
|
|
})
|
|
expect(routedAdapter.lastOptions?.model).toBe('routed-summary-model')
|
|
})
|
|
|
|
it('fails clearly when no summarization model can be resolved', async () => {
|
|
const ctx = new Context()
|
|
await ctx.plugin(LlmService)
|
|
void new TokenMeterService(ctx)
|
|
const compact = new BasicCompactService(ctx, { auto: false })
|
|
await expect(compact.summarize('history', agent(new Session(SessionId('model-less')))))
|
|
.rejects.toThrow(/no model available for summarization/)
|
|
})
|
|
|
|
it.each([
|
|
[{ kind: 'error', message: 'provider failed', code: 'PROVIDER' }, 'PROVIDER', /provider failed/],
|
|
[{ kind: 'error', message: 'opaque' }, undefined, /opaque/],
|
|
[{ kind: 'aborted' }, 'ABORTED', /aborted/],
|
|
[{ kind: 'max-tokens' }, 'MAX_TOKENS', /token cap/],
|
|
] as Array<[(StreamChunk & { type: 'finish' })['reason'], string | undefined, RegExp]>) (
|
|
'rejects terminal finish %#',
|
|
async (finish, code, pattern) => {
|
|
const { compact } = await summarizerHarness([], finish)
|
|
let thrown: unknown
|
|
try {
|
|
await compact.summarize('history', agent(conversation(1), MODEL))
|
|
} catch (error: unknown) {
|
|
thrown = error
|
|
}
|
|
expect(thrown).toBeInstanceOf(Error)
|
|
expect((thrown as Error).message).toMatch(pattern)
|
|
expect((thrown as Error & { code?: string }).code).toBe(code)
|
|
},
|
|
)
|
|
|
|
it('rejects empty or reasoning-only successful output', async () => {
|
|
const { compact } = await summarizerHarness([{ type: 'reasoning', text: 'private' }])
|
|
await expect(compact.summarize('history', agent(conversation(1), MODEL)))
|
|
.rejects.toThrow(/no text summary content/)
|
|
})
|
|
})
|
|
|
|
describe('automatic listener and loader composition', () => {
|
|
function postStep(ctx: Context, owner: Agent, signal = SIGNAL): Promise<unknown> {
|
|
return ctx.serial('agent/post-step', owner, 1, 1, signal)
|
|
}
|
|
|
|
function recover(
|
|
ctx: Context,
|
|
owner: Agent,
|
|
error: Error & { code?: string },
|
|
retryAttempt = 0,
|
|
signal = SIGNAL,
|
|
next: () => Promise<{ action: 'fail' | 'retry' }> = () => Promise.resolve({ action: 'fail' }),
|
|
): Promise<{ action: 'fail' | 'retry' }> {
|
|
return ctx.waterfall('agent/request-error', owner, 1, 1, error, retryAttempt, signal, next)
|
|
}
|
|
|
|
function overflow(message = 'provider overflow'): Error & { code: string } {
|
|
return Object.assign(new Error(message), { code: CONTEXT_WINDOW_EXCEEDED_CODE })
|
|
}
|
|
|
|
it('compacts post-step above threshold using the durable routed model and remains idle below it', async () => {
|
|
const ctx = createContext()
|
|
const compact = new TestCompactService(ctx, {
|
|
models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
|
|
})
|
|
const pressured = conversation(4)
|
|
await postStep(ctx, agent(pressured, 'unconfigured-agent-fallback'))
|
|
expect(pressured.events.some(event => event.type === 'compact/summary')).toBe(true)
|
|
|
|
const small = conversation(1)
|
|
await postStep(ctx, agent(small, MODEL))
|
|
expect(small.events.some(event => event.type === 'compact/start')).toBe(false)
|
|
expect(compact.calls).toHaveLength(1)
|
|
})
|
|
|
|
it('skips post-step pressure when the step signal is already aborted', async () => {
|
|
const ctx = createContext()
|
|
const compact = new TestCompactService(ctx, {
|
|
models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
|
|
})
|
|
const pressured = conversation(4)
|
|
const compactIfNeeded = vi.spyOn(compact, 'compactIfNeeded')
|
|
|
|
await expect(postStep(ctx, agent(pressured, MODEL), AbortSignal.abort('step aborted')))
|
|
.resolves.toBeUndefined()
|
|
|
|
expect(compactIfNeeded).not.toHaveBeenCalled()
|
|
expect(pressured.events.some(event => event.type === 'compact/start')).toBe(false)
|
|
})
|
|
|
|
it('warns and continues after operational failures, including non-Errors', async () => {
|
|
const ctx = createContext()
|
|
const warnings: string[] = []
|
|
ctx.logger.warn = ((message: string) => void warnings.push(message)) as typeof ctx.logger.warn
|
|
const compact = new TestCompactService(ctx, {
|
|
models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
|
|
})
|
|
compact.error = 'temporary failure'
|
|
const session = conversation(4)
|
|
|
|
await expect(postStep(ctx, agent(session, MODEL))).resolves.toBeUndefined()
|
|
expect(warnings).toContainEqual(expect.stringContaining('temporary failure'))
|
|
expect(session.events.some(event => event.type === 'compact/summary')).toBe(false)
|
|
})
|
|
|
|
it('propagates a named unknown-model configuration failure', async () => {
|
|
const ctx = createContext()
|
|
void new TestCompactService(ctx)
|
|
const session = conversation(4)
|
|
session.append('request/header', {
|
|
header: { config: { model: 'missing' } },
|
|
reason: 'resume',
|
|
})
|
|
await expect(postStep(ctx, agent(session, MODEL))).rejects.toMatchObject({
|
|
code: TOKEN_METER_MODEL_UNCONFIGURED,
|
|
model: 'missing',
|
|
})
|
|
})
|
|
|
|
it('force-compacts below normal pressure for canonical overflow and retries only after replacement', async () => {
|
|
const ctx = createContext()
|
|
void new TestCompactService(ctx, {
|
|
models: { [MODEL]: { thresholdRatio: 1, retainTokens: 90 } },
|
|
})
|
|
const session = conversation(3)
|
|
const beforeGeneration = session.surface.replaceGeneration
|
|
const retainedSeq = session.surface.nodes.at(-1)!.seq
|
|
const threshold = 100
|
|
expect(ctx.tokenMeter.resolve(MODEL).measure(session).totalTokens).toBeLessThan(threshold)
|
|
const decision = await recover(ctx, agent(session, 'unconfigured-agent-fallback'), overflow())
|
|
|
|
expect(decision).toEqual({ action: 'retry' })
|
|
expect(session.surface.replaceGeneration).toBe(beforeGeneration + 1)
|
|
expect(session.events.some(event => event.type === 'compact/summary')).toBe(true)
|
|
expect(session.surface.nodes.some(node => node.seq === retainedSeq)).toBe(true)
|
|
})
|
|
|
|
it('preserves the newest whole tool-call/result pair during forced overflow compaction', async () => {
|
|
const ctx = createContext()
|
|
void new TestCompactService(ctx, {
|
|
models: { [MODEL]: { thresholdRatio: 1, retainTokens: 90 } },
|
|
})
|
|
const session = toolConversation()
|
|
const newestAssistant = session.surface.nodes.at(-2)!
|
|
const newestResult = session.surface.nodes.at(-1)!
|
|
|
|
expect(await recover(ctx, agent(session, MODEL), overflow())).toEqual({ action: 'retry' })
|
|
const currentAssistant = session.surface.nodes.find(node => node.seq === newestAssistant.seq)
|
|
const currentResult = session.surface.nodes.find(node => node.seq === newestResult.seq)
|
|
expect(currentAssistant).toBeDefined()
|
|
expect(currentResult).toBeDefined()
|
|
expect(toolPairingBalancedBefore(session, currentAssistant!)).toBe(true)
|
|
expect(toolPairingBalancedAfter(session, currentResult!)).toBe(true)
|
|
})
|
|
|
|
it('does not retry when a backend reports success without replacing the surface', async () => {
|
|
const ctx = createContext()
|
|
const compact = new TestCompactService(ctx)
|
|
const session = conversation(2)
|
|
const fakeResult: CompactionResult = {
|
|
startSeq: 1,
|
|
summarySeq: 2,
|
|
endSeq: 3,
|
|
summary: [{ type: 'text', text: 'fake' }],
|
|
shadowedRange: { start: 1, end: 2 },
|
|
shadowedSeqs: [1, 2],
|
|
shadowedTokenCount: 10,
|
|
}
|
|
vi.spyOn(compact, 'compactIfNeeded').mockResolvedValue(fakeResult)
|
|
|
|
expect(await recover(ctx, agent(session, MODEL), overflow())).toEqual({ action: 'fail' })
|
|
expect(session.surface.replaceGeneration).toBe(0)
|
|
})
|
|
|
|
it('delegates downstream exactly once when no replacement is available', async () => {
|
|
const ctx = createContext()
|
|
const compact = new TestCompactService(ctx)
|
|
vi.spyOn(compact, 'compactIfNeeded').mockResolvedValue(null)
|
|
const downstream = new Error('downstream recovery failed')
|
|
let calls = 0
|
|
|
|
await expect(recover(
|
|
ctx,
|
|
agent(conversation(2), MODEL),
|
|
overflow(),
|
|
0,
|
|
SIGNAL,
|
|
() => {
|
|
calls += 1
|
|
return Promise.reject(downstream)
|
|
},
|
|
)).rejects.toBe(downstream)
|
|
expect(calls).toBe(1)
|
|
})
|
|
|
|
it('preserves the original provider error when recovery throws', async () => {
|
|
const ctx = createContext()
|
|
const warnings: string[] = []
|
|
ctx.logger.warn = ((message: string) => void warnings.push(message)) as typeof ctx.logger.warn
|
|
const compact = new TestCompactService(ctx)
|
|
compact.error = new Error('summary unavailable')
|
|
const original = overflow('original provider overflow')
|
|
|
|
expect(await recover(ctx, agent(conversation(3), MODEL), original)).toEqual({ action: 'fail' })
|
|
expect(original).toMatchObject({
|
|
message: 'original provider overflow',
|
|
code: CONTEXT_WINDOW_EXCEEDED_CODE,
|
|
})
|
|
expect(warnings).toContainEqual(expect.stringContaining('preserving the original request error'))
|
|
})
|
|
|
|
it('delegates once when overflow recovery throws a non-Error value', async () => {
|
|
const ctx = createContext()
|
|
const warnings: string[] = []
|
|
ctx.logger.warn = ((message: string) => void warnings.push(message)) as typeof ctx.logger.warn
|
|
const compact = new TestCompactService(ctx)
|
|
compact.error = 'non-error recovery failure'
|
|
const session = conversation(3)
|
|
const generation = session.surface.replaceGeneration
|
|
const original = overflow('original provider failure')
|
|
let delegations = 0
|
|
|
|
const decision = await recover(ctx, agent(session, MODEL), original, 0, SIGNAL, () => {
|
|
delegations += 1
|
|
return Promise.resolve({ action: 'fail' })
|
|
})
|
|
|
|
expect(decision).toEqual({ action: 'fail' })
|
|
expect(delegations).toBe(1)
|
|
expect(session.surface.replaceGeneration).toBe(generation)
|
|
expect(original).toMatchObject({
|
|
message: 'original provider failure',
|
|
code: CONTEXT_WINDOW_EXCEEDED_CODE,
|
|
})
|
|
expect(warnings).toContainEqual(expect.stringContaining('non-error recovery failure'))
|
|
})
|
|
|
|
it('delegates once and preserves the original overflow for an unknown routed meter model', async () => {
|
|
const ctx = createContext()
|
|
void new TestCompactService(ctx)
|
|
const session = conversation(2)
|
|
session.append('request/header', {
|
|
header: { config: { model: 'unknown-routed-model' } },
|
|
reason: 'resume',
|
|
})
|
|
const original = overflow('original unknown-model overflow')
|
|
let delegations = 0
|
|
|
|
const decision = await recover(ctx, agent(session, MODEL), original, 0, SIGNAL, () => {
|
|
delegations += 1
|
|
return Promise.resolve({ action: 'fail' })
|
|
})
|
|
expect(decision).toEqual({ action: 'fail' })
|
|
expect(delegations).toBe(1)
|
|
expect(original).toMatchObject({
|
|
message: 'original unknown-model overflow',
|
|
code: CONTEXT_WINDOW_EXCEEDED_CODE,
|
|
})
|
|
})
|
|
|
|
it('honors retry caps, non-context failures, and cancellation', async () => {
|
|
const ctx = createContext()
|
|
const compact = new TestCompactService(ctx, { maxOverflowRetries: 1 })
|
|
const compactSpy = vi.spyOn(compact, 'compactIfNeeded')
|
|
const owner = agent(conversation(3), MODEL)
|
|
expect(await recover(ctx, owner, Object.assign(new Error('rate limit'), { code: 'RATE_LIMIT' })))
|
|
.toEqual({ action: 'fail' })
|
|
expect(await recover(ctx, owner, overflow(), 1)).toEqual({ action: 'fail' })
|
|
|
|
const controller = new AbortController()
|
|
controller.abort('cancelled')
|
|
expect(await recover(ctx, owner, overflow(), 0, controller.signal)).toEqual({ action: 'fail' })
|
|
expect(compactSpy).not.toHaveBeenCalled()
|
|
})
|
|
|
|
it('does not retry when cancellation lands during an awaited compaction', async () => {
|
|
const ctx = createContext()
|
|
const compact = new TestCompactService(ctx)
|
|
const controller = new AbortController()
|
|
compact.mutateDuringSummary = () => { controller.abort('cancelled during summary') }
|
|
const session = conversation(3)
|
|
const generation = session.surface.replaceGeneration
|
|
|
|
expect(await recover(ctx, agent(session, MODEL), overflow(), 0, controller.signal))
|
|
.toEqual({ action: 'fail' })
|
|
expect(session.surface.replaceGeneration).toBe(generation + 1)
|
|
})
|
|
|
|
it('maxOverflowRetries:0 disables recovery without disabling post-step pressure', async () => {
|
|
const ctx = createContext()
|
|
void new TestCompactService(ctx, {
|
|
maxOverflowRetries: 0,
|
|
models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
|
|
})
|
|
const session = conversation(4)
|
|
await postStep(ctx, agent(session, MODEL))
|
|
const summaries = session.events.filter(event => event.type === 'compact/summary').length
|
|
expect(summaries).toBe(1)
|
|
expect(await recover(ctx, agent(session, MODEL), overflow())).toEqual({ action: 'fail' })
|
|
expect(session.events.filter(event => event.type === 'compact/summary')).toHaveLength(summaries)
|
|
})
|
|
|
|
it('auto:false installs neither automatic listener', async () => {
|
|
const ctx = createContext()
|
|
void new TestCompactService(ctx, {
|
|
auto: false,
|
|
models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
|
|
})
|
|
const session = conversation(4)
|
|
await postStep(ctx, agent(session, MODEL))
|
|
expect(session.events.some(event => event.type === 'compact/start')).toBe(false)
|
|
expect(await recover(ctx, agent(session, MODEL), overflow())).toEqual({ action: 'fail' })
|
|
})
|
|
|
|
it('loads and disposes the real zero-config service stack', async () => {
|
|
const ctx = new Context()
|
|
await ctx.plugin(LlmService)
|
|
const meterFiber = await ctx.plugin(TokenMeterService)
|
|
const compactFiber = await ctx.plugin(BasicCompactService, { auto: false })
|
|
|
|
expect(ctx.tokenMeter.resolve('deepseek-v4-flash').contextWindow).toBe(128_000)
|
|
expect(ctx.get('compact')).toBeInstanceOf(BasicCompactService)
|
|
await compactFiber.dispose()
|
|
expect(ctx.get('compact')).toBeUndefined()
|
|
await meterFiber.dispose()
|
|
expect(ctx.get('tokenMeter')).toBeUndefined()
|
|
})
|
|
|
|
it('removes its automatic listener with the plugin fiber', async () => {
|
|
const ctx = new Context()
|
|
await ctx.plugin(LlmService)
|
|
await ctx.plugin(TokenMeterService, {
|
|
models: { [MODEL]: { contextWindow: 100, charsPerToken: 1_000 } },
|
|
})
|
|
const fiber = await ctx.plugin(TestCompactService, {
|
|
models: { [MODEL]: { thresholdRatio: 0.5, retainTokens: 18 } },
|
|
})
|
|
await fiber.dispose()
|
|
|
|
const session = conversation(4)
|
|
await postStep(ctx, agent(session, MODEL))
|
|
expect(session.events.some(event => event.type === 'compact/start')).toBe(false)
|
|
expect(await recover(ctx, agent(session, MODEL), overflow())).toEqual({ action: 'fail' })
|
|
})
|
|
})
|
|
|
|
describe('typed unknown-model boundary', () => {
|
|
it('uses TokenMeterError identity rather than message matching', () => {
|
|
const ctx = createContext()
|
|
let thrown: unknown
|
|
try {
|
|
ctx.tokenMeter.resolve('missing')
|
|
} catch (error: unknown) {
|
|
thrown = error
|
|
}
|
|
expect(thrown).toBeInstanceOf(TokenMeterError)
|
|
expect(thrown).toMatchObject({ code: TOKEN_METER_MODEL_UNCONFIGURED })
|
|
})
|
|
})
|