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* feat(llm): add OpenAI Codex backend config and OAuth session manager Add OpenAiCodex as a new LLM backend variant with config for auth endpoint, API base URL, client ID, and session persistence path. The session manager implements OpenAI's device code auth flow (headless-friendly, no browser required on the server) with automatic token refresh, following the same persistence pattern as the existing NEAR AI session manager. Closes #742 Co-Authored-By: Claude Opus 4.6 <[email protected]> * feat(llm): add Responses API client and token-refreshing decorator Native Responses API client for chatgpt.com/backend-api/codex/responses, the endpoint that works with ChatGPT subscription tokens. Handles SSE streaming, text completions, and tool call round-trips. Token-refreshing decorator wraps the provider to pre-emptively refresh OAuth tokens before API calls and retry once on auth failures. Reports zero cost since billing is through subscription. Co-Authored-By: Claude Opus 4.6 <[email protected]> * feat(llm): wire OpenAI Codex into provider factory, CLI, and setup wizard Connect the new provider to the LLM factory, add openai_codex to the CLI --backend flag, and add it as an option in the onboarding wizard. Co-Authored-By: Claude Opus 4.6 <[email protected]> * fix(llm): address PR #744 review feedback (20 items) Review fixes for the OpenAI Codex provider PR: - Remove dead `generate_pkce()` code (device flow gets PKCE from server) - Fix `refresh_tokens()` to use `.form()` instead of `.json()` per OAuth spec - Inline codex dispatch into `build_provider_chain()` (single async function, no separate `assemble_provider_chain()` helper — matches main's pattern) - Remove Clone from `OpenAiCodexSession`, restrict fields to `pub(crate)` - Propagate HTTP client builder error instead of silent fallback - Redact device code response body from debug log - Change `set_model()` in TokenRefreshingProvider to delegate to inner - Replace hardcoded `/tmp/` test path with `tempfile::tempdir()` - Accept `request_timeout_secs` from config instead of hardcoded 300s - Parse `Retry-After` header on 429 responses (matches nearai_chat.rs pattern) - Reuse `normalize_schema_strict()` for Codex tool definitions - Add warning log for dropped image attachments - Add doc comments on `list_models()` and `include` field - Add `OPENAI_CODEX_API_URL` to `.env.example` - Fix codex error message in `create_llm_provider()` for clarity - Revert unrelated `.worktrees` addition to `.gitignore` - Update `src/llm/CLAUDE.md` with Codex provider docs [skip-regression-check] Co-Authored-By: Claude Opus 4.6 <[email protected]> * fix: address review feedback and harden OpenAI Codex provider (takeover #744) Security: - Add SSRF validation (validate_base_url) on OPENAI_CODEX_AUTH_URL and OPENAI_CODEX_API_URL, matching the pattern used by all other base URL configs (regression test for #1103 included) Correctness: - Add missing cache_write_multiplier() and cache_read_discount() trait delegation in TokenRefreshingProvider - Cap device-code polling backoff at 60s to prevent unbounded interval growth on repeated 429 responses - Default expires_in to 3600s when server returns 0, preventing immediately-expired sessions - Fix pre-existing SseEvent::JobResult missing fallback_deliverable field in job_monitor.rs tests Cleanup: - Extract duplicated make_test_jwt() and test_codex_config() into shared codex_test_helpers module Co-Authored-By: Sanjeev-S <[email protected]> Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> * fix: address PR review feedback on OpenAI Codex provider (#1461) - Login command now resolves OPENAI_CODEX_* env overrides even when LLM_BACKEND isn't set to openai_codex (Copilot review) - Setup wizard "Keep current provider?" for codex no longer re-triggers device code login — mirrors Bedrock's keep-and-return pattern (Copilot) - Revert provider init log from info back to debug (Copilot) - Add warning log when token expires_in=0, before defaulting to 3600s (Gemini review) Co-Authored-By: Sanjeev-S <[email protected]> Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]> --------- Co-authored-by: Sanjeev Suresh <[email protected]> Co-authored-by: Claude Opus 4.6 <[email protected]>