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eryao/docs/protocols/common/http-error-codes.md
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HTTP Error Codes

This document is the source of truth for backend RFC7807 code values consumed by frontend.

Auth

code status meaning frontend handling
AUTH_SERVICE_UNAVAILABLE 503 Auth upstream unavailable Show retry message and allow retry
AUTH_TOO_MANY_REQUESTS 429 OTP request throttled Show wait message
AUTH_VERIFICATION_CODE_INVALID 401 Invalid OTP code Prompt user to re-enter code
AUTH_REFRESH_TOKEN_INVALID 401 Invalid/expired refresh token Clear local session and return login
AUTH_REFRESH_TOKEN_MISSING 401 Refresh token missing on logout Treat as local logout and clear session
AUTH_USER_NOT_FOUND 404 User not found Show not-found message where applicable

Agent Points

code status meaning frontend handling
POINTS_INSUFFICIENT_BALANCE 402 Not enough points to start this run Show recharge/insufficient-points prompt

Agent Session

code status meaning frontend handling
AGENT_SESSION_RUN_LIMIT_EXCEEDED 409 Session already reached max run count (start + 3 follow-ups) Show run-limit message and require starting a new session

Compatibility strategy:

  • Additive changes only for new codes.
  • Existing codes must keep semantic meaning.
  • Frontend must map by code, not by detail text.