# NousResearch/hermes-agent · OpenAI regex lookaround schema rejection and retry handling

## Open now

- Nothing open on GitHub.

These items concern OpenAI-compatible endpoints rejecting tool schemas that contain regex lookaround patterns. They explore classifying this rejection as recoverable and retrying requests with sanitized schemas.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #115853. Verify it addresses your case.
- **Recommended:** read PR #115853 (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: `resolved` · deciding PR(s): `pr-115853`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.67`: 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.

## Closed / duplicate issues

- #42631: GPT/OpenAI-compatible endpoints reject tool schemas with regex lookaround pattern

## Prior & competing PRs

- **#115853: fix(agent): strict OpenAI-compatible endpoints rejecting regex lookaround in tool schemas now retry with sanitized schemas (#42631, salvage #42635)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/error_classifier.py`, `tests/agent/test_error_classifier.py`
- **#42635: fix(agent): classify OpenAI regex lookaround schema rejection as recoverable**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `1d6b56c6e063`, `#115853`, `#42631`, `#42635`

## Fix status

- Merged to main in PR #115853 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-19`.
- Subsystem: `agent`