# NousResearch/hermes-agent · Review fork tool inheritance and cache parity bug

## Open now

- Nothing open on GitHub.

These issues and PRs concern a bug where background review forks do not properly inherit the parent agent's full tool surface, causing tools\[\] cache parity problems. Multiple fix attempts address copying parent tools onto the review fork.

## 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 #105843. Verify it addresses your case.
- **Recommended:** read PR #105843 (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-105843`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #103579: \[Bug\]: background_review fork drops external memory-provider tools, breaking tools\[\] cache parity

## Prior & competing PRs

- **#105843: Background-review fork advertises the parent's exact tools\[\] and keeps it through compaction (#103579, salvage #103581)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`; implication `superseded`
  - files: `agent/background_review.py`, `contributors/emails/[redacted:email]`, `tests/run_agent/test_background_review_cache_parity.py`
- **#103581: fix(agent): inherit parent's full tool surface on review fork for cache parity (#103579)**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `cb4c73d394`, `fccff8a722`, `6149b1d266`, `#105843`
- **#103666: fix(agent): inherit the parent's full tool surface on the review fork (#103579)**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#103581`
- **#103937: fix(agent): copy parent tools onto same-model review fork**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#103581`, `#103579`, `#103581`, `#103581`

## Fix status

- Merged to main in PR #105843 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-09`.