# NousResearch/hermes-agent · Tool output dedup state lost after context compaction

## Open now

- Nothing open on GitHub.

These issues and fixes concern tool outputs (especially read_file) being re-sent repeatedly after context compaction, because deduplication state is not preserved across compaction boundaries. The work addresses tracking and restoring that state to avoid redundant cache reads.

## 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 #101648. Verify it addresses your case.
- **Recommended:** read PR #101648 (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: `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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Closed / duplicate issues

- #84857: Tool outputs re-sent every turn → cache_read ~16× input; read_file dedup state lost across context compaction

## Prior & competing PRs

- **#101648: fix(tools): one full read_file recovery per compaction generation, then dedup stubs (salvage #84892)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/conversation_compression.py`, `tests/tools/test_file_read_guards.py`, `tools/file_tools.py`
- **#84892: fix(agent): preserve tool-output dedup state across context compaction**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `#34`, `#101648`

## Fix status

- Merged to main in PR #101648 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-02`.
- Subsystem: `agent`