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fix(session): avoid retaining surface fold history

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Hypatia May
2026-07-11 12:29:19 +08:00
parent ad32c57e72
commit 42d85cf76f
2 changed files with 27 additions and 13 deletions
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13
packages/core/session/tests/surface.spec.ts
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@@ -33,6 +33,19 @@ describe('SurfaceManager', () => {
expect(foldSurface(s.events).replacements[0]!.shadowedSeqs).toEqual([0])
})
it('does not retain fold-only replacement history in incremental state', () => {
const s = new Session(SessionId('incremental-state'))
s.append('user/message', { content: [{ type: 'text', text: 'a' }], source: { kind: 'user' } }, { surfaceOp: 'append' })
s.append('assistant/message', { turn: 1, step: 1, content: [{ type: 'text', text: 'b' }] }, { surfaceOp: { op: 'replace', start: 0, end: 0 } })
expect(s.surface.nodes).toEqual([{ seq: 1, prev: null, next: null }])
const manager = s.surface as unknown as { _state: object }
expect(Object.hasOwn(manager._state, 'replacements')).toBe(false)
expect(foldSurface(s.events).replacements).toEqual([
{ seq: 1, start: 0, end: 0, shadowedSeqs: [0] },
])
})
it('foldSurface reports the same invalid replacement failures as the incremental manager', () => {
const s = new Session(SessionId('shared-fold-invalid'))
s.append('user/message', { content: [{ type: 'text', text: 'a' }], source: { kind: 'user' } }, { surfaceOp: 'append' })