# NousResearch/hermes-agent · Tool call/result pairing and sanitization fixes

## Open now

- Nothing open on GitHub.

Multiple fixes addressing how tool_call and tool_result pairs are validated, sanitized, and enforced before API submission. Work covers orphaned or mismatched pairs, positional adjacency requirements, and handling of replayed or historical tool results.

## TL;DR

- 6 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 2 merged PR(s), 3 PR(s) closed without merging.
- A fix was merged to main in PR #97167. Verify it addresses your case.
- **Recommended:** read PR #97167 (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-97203`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.33`: 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

- #94704: Pre-call sanitizer accepts historical tool results for replayed calls

## Prior & competing PRs

- **#97167: fix(agent): tool-pair sanitizers — whitespace ids pair, stale empty tool_calls drop, orphan logic unified (salvage #55845 + #78063 + #59434)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `agent/agent_runtime_helpers.py`, `agent/context_compressor.py`, `tests/agent/test_context_compressor.py`, `tests/run_agent/test_message_sequence_repair.py`
- **#97203: fix: strict positional providers no longer 400 on histories with displaced or replayed tool results — enforce tool_call/tool_result adjacency at both repair layers**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `agent/agent_runtime_helpers.py`, `contributors/emails/[redacted:email]`, `contributors/emails/[redacted:email]`, `tests/run_agent/test_message_sequence_repair.py`
- **#84481: fix: prune positionally unanswered tool_calls before API send**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `#97203`, `#94704`
- **#94731: fix(agent): enforce positional tool-result pairing**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`
- **#95751: fix: enforce positional tool_call/tool_result pairing before API send (#94704)**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `#97203`, `#97167`, `#94704`

## Fix status

- Merged to main in PR #97167 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-08-28`.
- Subsystem: `agent`