Function loadSessionFile

src/utils/sessionStorage.ts:4020–4057

* Loads all messages, summaries, file history snapshots, and attribution snapshots from a specific session file.

(sessionId: UUID)

 * Loads all messages, summaries, file history snapshots, and attribution snapshots from a specific session file.
 */
async function loadSessionFile(sessionId: UUID): Promise<{
  messages: Map<UUID, TranscriptMessage>
  summaries: Map<UUID, string>
  customTitles: Map<UUID, string>
  tags: Map<UUID, string>
  agentSettings: Map<UUID, string>
  worktreeStates: Map<UUID, PersistedWorktreeSession | null>
  fileHistorySnapshots: Map<UUID, FileHistorySnapshotMessage>
  attributionSnapshots: Map<UUID, AttributionSnapshotMessage>
  contentReplacements: Map<UUID, ContentReplacementRecord[]>
  contextCollapseCommits: ContextCollapseCommitEntry[]
  contextCollapseSnapshot: ContextCollapseSnapshotEntry | undefined
}> {
  const sessionFile = join(
    getSessionProjectDir() ?? getProjectDir(getOriginalCwd()),
    `${sessionId}.jsonl`,
  )
  try {
    return await loadTranscriptFile(sessionFile)
  } catch (e) {
    if (e instanceof TranscriptParseError && e.code === 'ENOENT') {
      return {
        messages: new Map(),
        summaries: new Map(),
        customTitles: new Map(),
        tags: new Map(),
        agentSettings: new Map(),
        worktreeStates: new Map(),
        fileHistorySnapshots: new Map(),
        attributionSnapshots: new Map(),
        contentReplacements: new Map(),
        contextCollapseCommits: [],
        contextCollapseSnapshot: undefined,
      }
    }
    throw e
  }
}

/**
 * Gets message UUIDs for a specific session without loading all sessions.