# NousResearch/hermes-agent · Anthropic thinking signature errors after orphan tool-call stripping

## Open now

- Nothing open on GitHub.

Members center on Anthropic extended-thinking requests where stripping orphaned tool calls from an assistant turn may leave a stale thinking signature, linked to a reported non-retryable HTTP 400 loop after an interrupted parallel tool batch. Three items are fix proposals (two share the same title, one differs in approach: dropping vs. demoting thinking blocks) and one is a bug report.

## TL;DR

- 4 member(s): 0 open issue(s), 1 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 #35859. Verify it addresses your case.
- **Recommended:** read PR #35859 (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-35859`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Closed / duplicate issues

- #35847: \[Bug\]: extended-thinking + interrupted parallel tool batch → non-retryable HTTP 400 crash-loop (stale thinking signature)

## Prior & competing PRs

- **#35859: fix(anthropic): demote dead thinking signature when orphan-strip mutates the latest turn**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/anthropic_adapter.py`, `scripts/release.py`, `tests/agent/test_anthropic_adapter.py`
- **#35846: fix(anthropic): demote dead thinking signature when orphan-strip mutates the latest turn**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `64628ea89`, `#35859`
- **#35855: fix(anthropic): drop thinking blocks when orphan-strip mutates an assistant turn**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `64628ea89b1d5624f47b402edd54b13afd335123`, `#35859`, `#35847`

## Fix status

- Merged to main in PR #35859 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-05-31`.
- Subsystem: `agent`