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fix(web): address session fork review findings

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This commit is contained in:
imccyu
2026-07-30 12:55:10 +08:00
parent 57fb5b488e
commit 36f1489398
31 changed files with 346 additions and 80 deletions
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21
packages/host/apiproxy/src/api-proxy.ts
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@@ -1154,15 +1154,23 @@ export function createApiProxy(ctx: Context, defaults: ApiProxyDefaults): ApiPro
if ('error' in found) return err(request, found.error)
const source = found.agent.session
const events = source.events
// Boundary: the first turn/end at or after atSeq (fork includes that
// whole turn); an overshooting atSeq or an omitted one falls back to
// the last completed turn.
const boundary = (atSeq === undefined ? undefined : events.find(e => e.type === 'turn/end' && e.seq >= atSeq))
?? events.findLast(e => e.type === 'turn/end')
// An in-log anchor belongs to the turn containing it and must never
// clip backward to an earlier completed turn. Omitted and past-end
// anchors retain the last-completed-turn shortcut.
const lastSeq = events.at(-1)?.seq ?? -1
const anchoredBoundary = atSeq === undefined
? undefined
: events.find(e => e.type === 'turn/end' && e.seq >= atSeq)
const boundary = anchoredBoundary
?? (atSeq === undefined || atSeq > lastSeq
? events.findLast(e => e.type === 'turn/end')
: undefined)
if (boundary === undefined) {
return err(request, {
code: 'fork-unavailable',
message: `session "${sessionId}" has no completed turn to fork from`,
message: atSeq !== undefined && atSeq <= lastSeq
? `session "${sessionId}" has not completed the turn containing event ${String(atSeq)}`
: `session "${sessionId}" has no completed turn to fork from`,
details: { sessionId },
})
}
@@ -1183,6 +1191,7 @@ export function createApiProxy(ctx: Context, defaults: ApiProxyDefaults): ApiPro
seedLength: cut,
},
agentOptions,
setup: installTarget,
})
} catch (error: unknown) {
return err(request, {