# NousResearch/hermes-agent · Fix reaction failures on resumed/rotated desktop sessions

## Open now

- Nothing open on GitHub.

These items address errors (including 4040 failures) that occur when reacting to messages in rehydrated, rotated, or pre-compaction desktop sessions, focusing on correct session-key and row-id resolution.

## 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 #115321. Verify it addresses your case.
- **Recommended:** read PR #115321 (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-115321`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #80670: fix(desktop): "Could not react" / 4040 on resumed conversations (message.react session-key & row-id resolution)

## Prior & competing PRs

- **#115321: Desktop: reacting to a pre-compaction message no longer fails with 4040 (#80670, salvage #95833 + #108542)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `apps/desktop/src/store/reactions.ts`, `contributors/emails/[redacted:email]`, `hermes_state_messages.py`, `tests/agent/test_message_reactions.py`, `tests/hermes_state/test_compacted_message_reactions.py`
- **#80675: fix(desktop): resolve reaction write key for rehydrated/rotated sessions**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#95833`, `#80670`

## Fix status

- Merged to main in PR #115321 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-18`.
- Subsystem: `apps/desktop`