# NousResearch/hermes-agent · macOS memory trimming and session memory release in hermes serve

## Open now

- 1 issue, 0 PRs open on GitHub.
- #131766: mem_trim: trim_memory() is a no-op on macOS - serve/gateway heap grows unbounded (no gc.collect / no page release)

The three members all concern memory growth in hermes serve/gateway, centered on mem_trim's trim_memory() reportedly doing nothing on macOS and on releasing memory from closed sessions (token memo, replay ring, gc). They appear to include an issue report, a perf change, and a fix proposal; their status and outcomes are not stated in the titles.

## TL;DR

- 3 member(s): 1 open issue(s), 0 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 #137087. Verify it addresses your case.
- **Recommended:** read PR #137087 (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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Open related issues

- #131766: mem_trim: trim_memory() is a no-op on macOS - serve/gateway heap grows unbounded (no gc.collect / no page release)

## Prior & competing PRs

- **#137087: perf: hermes serve releases a closed session's memory (token memo, replay ring, gc on macOS)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/compression_facade.py`, `agent/context_compressor_telemetry.py`, `agent/model_metadata_token_memo.py`, `hermes_cli/mem_trim.py`, `run_agent.py`, `tests/agent/test_token_memo_release_on_close.py`, `tests/hermes_cli/test_mem_trim.py`, `tests/tui_gateway/test_tui_gateway_event_replay.py`, `tui_gateway/event_replay.py`, `tui_gateway/session_lifecycle.py`
- **#131826: fix(mem_trim): collect on every platform and add darwin pressure relief**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `#131766`, `#137087`

## Fix status

- Merged to main in PR #137087 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-10-20`.
- Subsystem: `gateway`