Mintplex-Labs/anything-llm · error

Title must be lowercase with underscores only.

Error message

Title must be lowercase with underscores only.

What it means

Format validation error from ModelRouterRule.update relayed by PUT rules/:ruleId: the submitted title contains characters other than lowercase letters and underscores (the enforced slug-like convention for rule titles).

Source

Thrown at server/endpoints/modelRouter.js:173

      } catch (e) {
        console.error(e);
        response.sendStatus(500);
      }
    }
  );

  app.put(
    "/model-routers/:id/rules/:ruleId",
    [validatedRequest, flexUserRoleValid([ROLES.admin])],
    async (request, response) => {
      try {
        const { id, ruleId } = request.params;
        const data = reqBody(request);
        const { rule, error } = await ModelRouterRule.update(
          Number(ruleId),
          data
        );
        if (error) return response.status(400).json({ rule, error });
        ModelRouterService.invalidateRouter(Number(id));
        return response.status(200).json({ rule });
      } catch (e) {
        console.error(e);
        response.sendStatus(500);
      }
    }
  );

  app.delete(
    "/model-routers/:id/rules/:ruleId",
    [validatedRequest, flexUserRoleValid([ROLES.admin])],
    async (request, response) => {
      try {
        const { id, ruleId } = request.params;
        const success = await ModelRouterRule.delete(Number(ruleId));
        if (!success)
          return response

View on GitHub (pinned to 3aec848f28)

Solutions

1. Use lowercase letters and underscores only in the rule title.
2. Rename the rule, e.g. 'long_documents'.

When it happens

Trigger: Thrown at server/endpoints/modelRouter.js:173 when the library encounters an invalid state.

Common situations: Updating a rule with a title containing uppercase or special characters.

AI-assisted analysis of Mintplex-Labs/anything-llm@3aec848f28 (2026-08-18). Data as JSON: /api/errors/29e5bee58251e62f. Report an issue: GitHub.