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Inline session fork parameters

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Hypatia May
2026-07-07 09:04:49 +08:00
parent 9c5da8d81f
commit c7fba41ba9
8 changed files with 38 additions and 60 deletions
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36
packages/core/session/src/index.ts
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@@ -365,19 +365,6 @@ export class Session {
/** A fork source: either the live session object or its live store id. */
export type SessionForkSource = Session | SessionId
/** Inputs for live session forking. */
export interface ForkSessionOptions {
/** Live source session object or id. */
source: SessionForkSource
/**
* Inclusive source event seq to fork through. Omitted means the source's
* current last event; omitted on an empty source forks an empty child.
*/
boundary?: number
/** Optional child session id; omitted delegates to SessionStore's id policy. */
childSessionId?: SessionId
}
export type SessionForkErrorCode =
| 'SESSION_NOT_FOUND'
| 'SESSION_NOT_LIVE'
@@ -533,20 +520,25 @@ export class SessionStore extends Service {
* `boundary` is an inclusive source event seq; omitted means the source's
* current last event. A non-empty selected slice must end at `turn/end`.
*
* @param options Source, optional boundary, and optional child id for the fork.
* @param source - Live source session object or id.
* @param boundary - Inclusive source event seq to fork through; omitted means
* the source's current last event, and omitted on an empty source forks an
* empty child.
* @param childSessionId - Optional child session id; omitted delegates to
* `SessionStore`'s id policy.
* @returns The created live child session.
*/
fork(options: ForkSessionOptions): Session {
if (options.childSessionId !== undefined && this.get(options.childSessionId) !== undefined) {
throw new SessionForkError(`session "${options.childSessionId}" already exists`, 'SESSION_ALREADY_EXISTS')
fork(source: SessionForkSource, boundary?: number, childSessionId?: SessionId): Session {
if (childSessionId !== undefined && this.get(childSessionId) !== undefined) {
throw new SessionForkError(`session "${childSessionId}" already exists`, 'SESSION_ALREADY_EXISTS')
}
const source = this._resolveForkSource(options.source)
const seed = this._forkSeed(source, options.boundary)
return this.create(options.childSessionId, {
const liveSource = this._resolveForkSource(source)
const seed = this._forkSeed(liveSource, boundary)
return this.create(childSessionId, {
seed,
meta: {
...source.header.cwd !== undefined ? { cwd: source.header.cwd } : {},
parentSession: source.id,
...liveSource.header.cwd !== undefined ? { cwd: liveSource.header.cwd } : {},
parentSession: liveSource.id,
seedLength: seed.length,
},
})