# NousResearch/hermes-agent · ACP reasoning effort config support and fixes

## Open now

- 1 issue, 0 PRs open on GitHub.
- #78229: \[Bug\]: ACP path cannot control model thinking (reasoning effort) — missing feature parity with TUI Gateway

These issues and pull requests address missing and broken support for controlling model reasoning effort (thinking) in ACP sessions, including resolving it from config and fixing related API errors.

## TL;DR

- 4 member(s): 1 open issue(s), 0 closed issue(s), 0 open PR(s), 1 merged PR(s), 2 PR(s) closed without merging.
- A fix was merged to main in PR #115765. Verify it addresses your case.
- **Recommended:** read PR #115765 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.50`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Open related issues

- #78229: \[Bug\]: ACP path cannot control model thinking (reasoning effort) — missing feature parity with TUI Gateway

## Prior & competing PRs

- **#115765: fix(codex): reasoning_effort none is sent on OpenAI Responses, gpt-4o/4.1 no longer 400 on openai-api, ACP honors reasoning config (#75227, #76255, #85153, salvage #85164)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `acp_adapter/session.py`, `agent/auxiliary_client.py`, `agent/curator.py`, `agent/model_metadata.py`, `agent/transports/codex.py`, `contributors/emails/[redacted:email]`, `gateway/slash_commands_session.py`, `plugins/platforms/feishu/feishu_comment.py`, `tests/acp_adapter/test_session_reasoning_config.py`, `tests/agent/test_auxiliary_client.py`, `tests/agent/test_curator.py`, `tests/agent/test_error_classifier.py`, `tests/agent/transports/test_codex_transport.py`, `tests/gateway/test_compress_command.py`, `tests/gateway/test_feishu_comment.py`, `website/docs/user-guide/configuration.md`
- **#78295: fix(acp): support per-session reasoning effort for thinking control (#78229)**. closed without merge
  - maintainer direction: category `stale_abandoned`; implication `active`
- **#100380: fix(acp): resolve reasoning_effort from config for ACP sessions**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `80009fbd6f6d`, `#115765`, `#75227`, `#76255`, `#85153`, `#85164`

## Fix status

- Merged to main in PR #115765 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-19`.
- Subsystem: `acp`