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refactor: simplify session log representation

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This commit is contained in:
Tianyi Cui
2026-07-13 23:56:10 +08:00
parent d060c0dd4f
commit 1123e946c0
64 changed files with 522 additions and 1032 deletions
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23
packages/core/agent-loop/tests/request-log.spec.ts
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@@ -1,9 +1,8 @@
/**
* recordRequestHeader unit tests: exactly one of four things per request —
* recordRequestHeader unit tests: exactly one of three things per request —
* an 'initial' snapshot (log has no header yet), a 'resume' snapshot (fresh
* loop instance over a log that has one), nothing (header unchanged), a
* round-tripping delta, or a 'fallback' snapshot when the delta encoding
* cannot express the change (pure tool reordering).
* loop instance over a log that has one), nothing (header unchanged), or a
* full 'change' snapshot.
*/
import { describe, expect, it } from 'vitest'
@@ -23,7 +22,7 @@ function openSession(id: string): Session {
}
function headerEvents(session: Session): SessionEvent[] {
return session.events.filter(e => e.type === 'request/header' || e.type === 'request/header-delta')
return session.events.filter(e => e.type === 'request/header')
}
describe('recordRequestHeader', () => {
@@ -53,8 +52,8 @@ describe('recordRequestHeader', () => {
expect(events[1]?.type === 'request/header' && events[1].data.reason).toBe('resume')
})
it('logs a round-tripping delta for a mid-run change, and the fold reproduces the header', () => {
const session = openSession('rl-delta')
it("logs a full 'change' snapshot for a mid-run change, and the fold reproduces the header", () => {
const session = openSession('rl-change')
const state = createTransmissionLog()
const first = canonicalHeader({ config: { model: 'm' }, system: 'a\nb', tools: [tool('t')] })
recordRequestHeader(session, state, first)
@@ -63,12 +62,12 @@ describe('recordRequestHeader', () => {
recordRequestHeader(session, state, second)
const events = headerEvents(session)
expect(events).toHaveLength(2)
expect(events[1]?.type).toBe('request/header-delta')
expect(events[1]?.type === 'request/header' && events[1].data.reason).toBe('change')
expect(session.requestHeader()).toEqual(second)
})
it("records a change the delta cannot express (pure reordering) as a 'fallback' snapshot", () => {
const session = openSession('rl-fallback')
it("records a pure tool reordering as a 'change' snapshot", () => {
const session = openSession('rl-reorder')
const state = createTransmissionLog()
const first = canonicalHeader({ config: { model: 'm' }, tools: [tool('a'), tool('b')] })
recordRequestHeader(session, state, first)
@@ -77,9 +76,7 @@ describe('recordRequestHeader', () => {
recordRequestHeader(session, state, reordered)
const events = headerEvents(session)
expect(events).toHaveLength(2)
expect(events[1]?.type === 'request/header' && events[1].data.reason).toBe('fallback')
// The fold still lands on the exact header — deltas are an encoding
// optimization, never a correctness dependency.
expect(events[1]?.type === 'request/header' && events[1].data.reason).toBe('change')
expect(session.requestHeader()).toEqual(reordered)
})
})