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refactor(agent-loop): simplify observable state machine

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_Kerman
2026-07-24 21:18:48 +08:00
parent fb0ef82aa6
commit b73eb7663c
131 changed files with 2011 additions and 4292 deletions
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packages/core/agent-loop/tests/request-reconstruction.spec.ts
+10 -7
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@@ -114,7 +114,7 @@ describe('request stability across the loop', () => {
// A pre-step listener compacts turn 1's history before turn 2's step —
// the sanctioned surface rewrite, landing OUTSIDE the step.
const preStep = ctx.on('agent/pre-step', () => {
const preStep = ctx.on('agent/step', () => {
preStep()
const session = agent.session
const nodes = session.surface.nodes
@@ -167,7 +167,7 @@ describe('request stability across the loop', () => {
const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
let injected = false
ctx.on('agent/request', async (_agent, _turn, _step, _config, _signal, next) => {
ctx.on('agent/request', async (_agent, _turn, _step, _signal, next) => {
if (!injected) {
injected = true
agent.inject([{ type: 'text', text: '[late context]' }], { source: { kind: 'plugin', plugin: 'test' } })
@@ -195,7 +195,9 @@ describe('request stability across the loop', () => {
const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
const errors: Error[] = []
ctx.on('agent/error', (_agent, _turn, _step, error) => void errors.push(error))
ctx.on('agent/error', (_agent, _turn, _step, error) => {
if (error instanceof Error) errors.push(error)
})
ctx.on('llm/stream', (options, next) => {
// The historical failure mode this design kills: a listener rewriting
// request content in place. The freeze turns it into a loud error.
@@ -231,8 +233,7 @@ describe('request stability across the loop', () => {
await waitForIdle(ctx2, agent2)
const snapshots = agent2.session.events.filter(e => e.type === 'request/header')
expect(snapshots).toHaveLength(2)
expect(snapshots[1]?.type === 'request/header' && snapshots[1].data.reason).toBe('resume')
expect(snapshots).toHaveLength(1)
// Identical header across the restart: byte-identical continuation.
expect(adapter2.requests[0]!.system).toEqual(adapter.requests[0]!.system)
expectPrefixExtension(adapter.requests[0]!, adapter2.requests[0]!)
@@ -243,7 +244,7 @@ describe('request stability across the loop', () => {
const ctx = await harness(adapter)
const agent = ctx.agentLoop.create(SessionId('a1'), { provider: 'mock', model: 'mock' })
ctx.on('agent/request', async (_agent, _turn, _step, _config, _signal, next) => {
ctx.on('agent/request', async (_agent, _turn, _step, _signal, next) => {
const config = await next()
// next() resolves the SAME frozen seed — in-place shaping after
// delegation is unrepresentable, so a "mutate what next() returned"
@@ -280,7 +281,9 @@ describe('request stability across the loop', () => {
send(agent, 'go')
await waitForIdle(ctx, agent)
ctx.systemPrompt.section({ name: 'extra', order: 2, text: 'now with guidance' })
ctx.on('agent/request', async (_agent, _turn, _step, config, _signal, _next) => ({ ...config, temperature: 0.5, maxTokens: 99, stop: ['<END>'] }))
ctx.on('agent/request', async (_agent, _turn, _step, _signal, next) => ({
...await next(), temperature: 0.5, maxTokens: 99, stop: ['<END>'],
}))
send(agent, 'again')
await waitForIdle(ctx, agent)