# NousResearch/hermes-agent · ACP session process slot isolation bug and fix

## Open now

- Nothing open on GitHub.

A bug where concurrent ACP sessions shared a single process slot caused one session's close to kill a sibling request and leak its own process. The members cover the problem report and associated fixes to give each session its own slot.

## 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 #114795. Verify it addresses your case.
- **Recommended:** read PR #114795 (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-114795`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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

- #114639: Concurrent ACP sessions share a single process slot: one session's close kills a sibling request and leaks its own process

## Prior & competing PRs

- **#114795: fix(acp): concurrent Copilot ACP sessions no longer kill a sibling's process or leak their own (#114639, salvage #114640)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/copilot_acp_client.py`, `tests/agent/test_copilot_acp_client.py`
- **#114640: fix(acp): give each CopilotACPClient session its own process slot**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `dd6ab5d8cf0e`, `#114795`, `#114639`, `#114640`

## Fix status

- Merged to main in PR #114795 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-18`.