# NousResearch/hermes-agent · Overlapping compression commit-fence ordering bug and fix

## Open now

- Nothing open on GitHub.

These items address a race or ordering problem where overlapping \`_compress_context\` calls could corrupt or prematurely discard commit-fence slots. The fix tracks commit fences as a registration stack to keep the correct fence live when compression attempts overlap.

## 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 #117558. Verify it addresses your case.
- **Recommended:** read PR #117558 (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-117558`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #116635: Out-of-order completion of overlapping _compress_context calls corrupts the commit-fence slot

## Prior & competing PRs

- **#117558: fix(compression): overlapping compression attempts keep the newer attempt's commit fence live (#116635, salvage #116640)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/compression_facade.py`, `tests/agent/test_compression_commit_fence_race.py`
- **#116640: fix(compression): track commit fences as a registration stack**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `09b72bc6d2`, `#117558`

## Fix status

- Merged to main in PR #117558 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-20`.