# NousResearch/hermes-agent · Bedrock reasoning-only assistant turn validation fix

## Open now

- 1 issue, 1 PR open on GitHub.
- #105780: \[Bug\]: Bedrock Converse API rejects assistant turns containing only reasoningContent — ValidationException on Sonnet 5 / Fable 5.1 with extended thinking
- PR #105798: fix(bedrock): drop reasoning-only assistant turns from Converse messages

A bug was reported where Bedrock's Converse API rejects assistant turns containing only reasoning content, causing a ValidationException. Multiple fix attempts address this by dropping such turns from the message list.

## TL;DR

- 3 member(s): 1 open issue(s), 0 closed issue(s), 1 open PR(s), 0 merged PR(s), 1 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.67`: 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.

## Open related issues

- #105780: \[Bug\]: Bedrock Converse API rejects assistant turns containing only reasoningContent — ValidationException on Sonnet 5 / Fable 5.1 with extended thinking

## Prior & competing PRs

- **#105798: fix(bedrock): drop reasoning-only assistant turns from Converse messages**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `#105780`, `#105799`, `#105119`, `#101401`
  - files: `agent/bedrock_adapter.py`, `tests/agent/test_bedrock_adapter.py`
- **#105799: fix(bedrock): drop reasoning-only assistant turns Bedrock rejects as prefill (#105780)**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#105798`, `#105668`, `#105772`

## Fix status

- No merged fix on record.
- Subsystem: `agent`