# NousResearch/hermes-agent · Compression prune and compaction turn-retention fixes

## Open now

- Nothing open on GitHub.

These items address bugs where proactive pruning and micro-compaction incorrectly dropped turns appended from another surface, and include related fixes for atomic fence snapshot rewrites. The work centers on ensuring compression operations preserve recently added turns.

## TL;DR

- 4 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 2 PR(s) closed without merging.
- A fix was merged to main in PR #121489. Verify it addresses your case.
- **Recommended:** read PR #121489 (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-121489`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #120632: \[Bug\]: proactive prune and micro-compaction drop a turn another surface added from the model's history (no archive watermark)

## Prior & competing PRs

- **#121489: fix(compression): prune and micro-compaction no longer archive turns another surface appended**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/context_compressor.py`, `agent/conversation_compression.py`, `agent/micro_compaction.py`, `tests/agent/test_micro_compaction.py`
- **#120634: fix(compression): proactive prune and micro-compaction keep turns another surface appended**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `dd5179e3c7`, `33201f2efb`, `#120156`
- **#120821: fix(compression): fence snapshot rewrites atomically**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `3f7e0fd072`, `6614d16f35`, `40051c2a13`, `c68091c043`, `2492193c44`, `1c535d9689`, `#120632`, `#120634`

## Fix status

- Merged to main in PR #121489 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-24`.