earendil-works/pi · error

Callback route not found.

Error message

Callback route not found.

What it means

Error "Callback route not found." thrown in earendil-works/pi.

Source

Thrown at packages/ai/src/auth/oauth/anthropic.ts:117

async function startCallbackServer(expectedState: string): Promise<CallbackServerInfo> {
	const { createServer } = await getNodeApis();

	return new Promise((resolve, reject) => {
		let settleWait: ((value: { code: string; state: string } | null) => void) | undefined;
		const waitForCodePromise = new Promise<{ code: string; state: string } | null>((resolveWait) => {
			let settled = false;
			settleWait = (value) => {
				if (settled) return;
				settled = true;
				resolveWait(value);
			};
		});

		const server = createServer((req, res) => {
			try {
				const url = new URL(req.url || "", "http://localhost");
				if (url.pathname !== CALLBACK_PATH) {
					res.writeHead(404, { "Content-Type": "text/html; charset=utf-8" });
					res.end(oauthErrorHtml("Callback route not found."));
					return;
				}

				const code = url.searchParams.get("code");
				const state = url.searchParams.get("state");
				const error = url.searchParams.get("error");

				if (error) {
					res.writeHead(400, { "Content-Type": "text/html; charset=utf-8" });
					res.end(oauthErrorHtml("Anthropic authentication did not complete.", `Error: ${error}`));
					return;
				}

				if (!code || !state) {
					res.writeHead(400, { "Content-Type": "text/html; charset=utf-8" });
					res.end(oauthErrorHtml("Missing code or state parameter."));
					return;

View on GitHub (pinned to 4af9d21d3b)

Solutions

1. The OAuth callback hit an unknown route; stay on the callback URL and retry the login flow.

When it happens

Trigger: Thrown at packages/ai/src/auth/oauth/anthropic.ts:117 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/0cb613c602dc1de9. Report an issue: GitHub.