Agents propose. Nothing happens until you approve.

Why, according to the agent: Apply the existing login-specific fixed-window limiter to CSRF-valid login requests before parsing credentials or performing authentication, and verify that the endpoint rejects requests beyond the configured per-IP limit.

Each edit_file replaces one exact piece of text, which must match the file exactly once. Shown here as a diff.

1. edit_file app/api/login/route.ts +4 −0

     import { isCsrfRequestValid } from "../../../../lib/csrf";+ import {+   getClientIp,+   loginRateLimiter+ } from "../../../../lib/rate-limit";  import { logFailedLogin } from "../../../../lib/logger";

2. edit_file app/api/login/route.ts +14 −0

       if (!isCsrfRequestValid(request)) {      return Response.json(        { error: "Invalid CSRF origin" },        { status: 403 }      );    }  +   const rateLimit = loginRateLimiter.consume(getClientIp(request));+ +   if (!rateLimit.allowed) {+     return Response.json(+       { error: "Too many login attempts" },+       {+         status: 429,+         headers: {+           "Retry-After": String(rateLimit.retryAfterSeconds)+         }+       }+     );+   }+     const { username, password } = await request.json();

3. edit_file tests/rate-limit.test.ts +6 −1

   - import { RateLimiter, getClientIp } from "../lib/rate-limit";+ import {+   LOGIN_RATE_LIMIT,+   LOGIN_RATE_LIMIT_WINDOW_MS,+   RateLimiter,+   getClientIp+ } from "../lib/rate-limit";

4. edit_file tests/rate-limit.test.ts +5 −0

     describe("RateLimiter", () => {+   it("configures login attempts for a ten-attempt, fifteen-minute window", () => {+     expect(LOGIN_RATE_LIMIT).toBe(10);+     expect(LOGIN_RATE_LIMIT_WINDOW_MS).toBe(15 * 60 * 1000);+   });+     it("allows requests up to the limit and blocks the next one", () => {

5. report No effect

   “The login route will consume one rate-limit token per CSRF-valid request using the best-effort client IP. Requests after 10 attempts in 15 minutes will receive HTTP 429 with a Retry-After header before request-body parsing or authentication. Existing limiter tests will also pin the login-specific policy.”