# NousResearch/hermes-agent · Strip unsupported kwargs before Anthropic Messages calls

## Open now

- Nothing open on GitHub.

These items address a bug where Responses-API-only keyword arguments (such as 'instructions') were incorrectly passed through to the Anthropic Messages SDK, causing unexpected keyword argument errors. Fixes target the call sites to strip those kwargs before invoking Messages or stream().

## 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 #42155. Verify it addresses your case.
- **Recommended:** read PR #42155 (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-42155`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #31673: Messages.stream() got an unexpected keyword argument 'instructions'\` when continuing from a successful \`vision_analyze\` aux call

## Prior & competing PRs

- **#42155: fix(anthropic): strip Responses-only kwargs before Messages SDK call (#31673)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/anthropic_adapter.py`, `agent/chat_completion_helpers.py`, `run_agent.py`, `tests/agent/test_anthropic_kwargs_sanitize.py`
- **#31746: fix(anthropic): strip Codex/Responses-only kwargs at Anthropic call sites (#31673)**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `399b8ee5f0136e4b4c3cc4affdbf3bbf90b461c1`, `#42155`, `#31673`

## Fix status

- Merged to main in PR #42155 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-06-08`.
- Subsystem: `agent`