earendil-works/pi · error · Error

Failed to create forked session

Error message

Failed to create forked session

What it means

Error "Failed to create forked session" thrown in earendil-works/pi.

Source

Thrown at packages/coding-agent/src/core/agent-session-runtime.ts:320

						cwd: this.cwd,
						agentDir: this.services.agentDir,
						sessionManager,
						sessionStartEvent: { type: "session_start", reason: "fork", previousSessionFile },
					}),
				);
				await this.finishSessionReplacement(options?.withSession);
				return { cancelled: false, selectedText };
			}

			if (!existsSync(currentSessionFile)) {
				throw new Error(
					"This session has not been saved yet. Wait for the first assistant response before cloning or forking it.",
				);
			}
			const sessionManager = SessionManager.open(currentSessionFile, sessionDir);
			const forkedSessionPath = sessionManager.createBranchedSession(targetLeafId);
			if (!forkedSessionPath) {
				throw new Error("Failed to create forked session");
			}
			await this.teardownCurrent("fork", sessionManager.getSessionFile());
			this.apply(
				await this.createRuntime({
					cwd: sessionManager.getCwd(),
					agentDir: this.services.agentDir,
					sessionManager,
					sessionStartEvent: { type: "session_start", reason: "fork", previousSessionFile },
				}),
			);
			await this.finishSessionReplacement(options?.withSession);
			return { cancelled: false, selectedText };
		}

		const sessionManager = this.session.sessionManager;
		if (!targetLeafId) {
			sessionManager.newSession({ parentSession: this.session.sessionFile });
		} else {

View on GitHub (pinned to 4af9d21d3b)

When it happens

Trigger: Thrown at packages/coding-agent/src/core/agent-session-runtime.ts:320 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/965c9e7b101f5d05. Report an issue: GitHub.