# NousResearch/hermes-agent · Compression cooldown rollback crashes on missing session row

## Open now

- Nothing open on GitHub.

These issues and PRs address a bug where the compression failure-cooldown rollback raises an error instead of gracefully tolerating a missing or deleted session row, which can crash the turn dispatcher. The fixes make the rollback logic handle the absent row without raising.

## TL;DR

- 5 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 3 PR(s) closed without merging.
- A fix was merged to main in PR #106522. Verify it addresses your case.
- **Recommended:** read PR #106522 (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-106522`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.40`: 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

- #106271: Compression failure-cooldown rollback raises instead of tolerating a missing session row (turn-dispatcher crash)

## Prior & competing PRs

- **#106522: fix(state): compression cooldown rollback no longer crashes the turn when the session row vanished (#106271, salvage #106276)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `hermes_state_compression.py`, `tests/agent/test_compression_concurrent_fork.py`
- **#106276: fix(state): tolerate a vanished session row in compression cooldown rollback**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `8a50413ba2329e5182a97b68c69c9a703ad29ecb`, `#106522`, `#106271`
- **#106277: fix(compression): tolerate deleted cooldown sessions**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `8a50413ba2329e5182a97b68c69c9a703ad29ecb`, `17fe7bc75f7`, `#106522`, `#106271`
- **#106278: fix(state): tolerate missing session row in compression cooldown rollback (#106271)**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#106276`

## Fix status

- Merged to main in PR #106522 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-09`.