# NousResearch/hermes-agent · Preserve empty required arrays in tool schemas

## Open now

- Nothing open on GitHub.

These items address a bug where schema sanitization incorrectly removes empty \`required\` arrays from tool schemas, causing failures with strict OpenAI-compatible proxies. The fix ensures empty \`required: \[\]\` fields are retained rather than deleted.

## 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 #112169. Verify it addresses your case.
- **Recommended:** read PR #112169 (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-112169`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #111684: \[Bug\]: tools/\[schema_sanitizer.py\](http://schema_sanitizer.py/) deletes empty required arrays, contradicting its own conservative contract

## Prior & competing PRs

- **#112169: fix(tools): zero-argument tool schemas keep \`required: \[\]\` so strict OpenAI-compatible proxies stop 400ing (#111684, #59386, salvage #20151)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `contributors/emails/[redacted:email]`, `tests/tools/test_schema_sanitizer.py`, `tools/schema_sanitizer.py`
- **#111691: fix(schema): preserve empty required arrays**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `40b47b84e7`, `#112169`

## Fix status

- Merged to main in PR #112169 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-16`.