earendil-works/pi · error · Error

Persisted session is missing a session file

Error message

Persisted session is missing a session file

What it means

Error "Persisted session is missing a session file" thrown in earendil-works/pi.

Source

Thrown at packages/coding-agent/src/core/agent-session-runtime.ts:293

		if (!selectedEntry) {
			throw new Error("Invalid entry ID for forking");
		}

		if (position === "at") {
			targetLeafId = selectedEntry.id;
		} else {
			if (selectedEntry.type !== "message" || selectedEntry.message.role !== "user") {
				throw new Error("Invalid entry ID for forking");
			}
			targetLeafId = selectedEntry.parentId;
			selectedText = extractUserMessageText(selectedEntry.message.content);
		}

		const previousSessionFile = this.session.sessionFile;
		if (this.session.sessionManager.isPersisted()) {
			const currentSessionFile = this.session.sessionFile;
			if (!currentSessionFile) {
				throw new Error("Persisted session is missing a session file");
			}
			const sessionDir = this.session.sessionManager.getSessionDir();
			if (!targetLeafId) {
				const sessionManager = SessionManager.create(this.cwd, sessionDir);
				sessionManager.newSession({ parentSession: currentSessionFile });
				await this.teardownCurrent("fork", sessionManager.getSessionFile());
				this.apply(
					await this.createRuntime({
						cwd: this.cwd,
						agentDir: this.services.agentDir,
						sessionManager,
						sessionStartEvent: { type: "session_start", reason: "fork", previousSessionFile },
					}),
				);
				await this.finishSessionReplacement(options?.withSession);
				return { cancelled: false, selectedText };
			}

View on GitHub (pinned to 4af9d21d3b)

When it happens

Trigger: Thrown at packages/coding-agent/src/core/agent-session-runtime.ts:293 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of earendil-works/pi@4af9d21d3b (2026-08-24). Data as JSON: /api/errors/e05c7be0811c2fc1. Report an issue: GitHub.