# NousResearch/hermes-agent · Fix unsafe in-place overwrite in trajectory compressor

## Open now

- 1 issue, 1 PR open on GitHub.
- #84688: \[Bug\] trajectory_compressor accepts input == output and truncates the source JSONL (non-atomic write)
- PR #84713: fix(trajectory): refuse in-place output that truncates the source JSONL

A bug where trajectory_compressor accepts identical input and output paths, causing the source JSONL to be truncated via non-atomic writes. Fixes enforce rejection of input==output and introduce atomic write behavior.

## TL;DR

- 3 member(s): 1 open issue(s), 0 closed issue(s), 1 open PR(s), 0 merged PR(s), 1 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Open related issues

- #84688: \[Bug\] trajectory_compressor accepts input == output and truncates the source JSONL (non-atomic write)

## Prior & competing PRs

- **#84713: fix(trajectory): refuse in-place output that truncates the source JSONL**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - files: `tests/test_trajectory_compressor_in_place.py`, `trajectory_compressor.py`
- **#84715: fix(compression): reject input==output and write atomically in trajectory_compressor**. closed without merge
  - maintainer direction: category `silent_close`; implication `active`

## Fix status

- No merged fix on record.
- Subsystem: `hermes_cli`