# NousResearch/hermes-agent · Fix live dict mutation during plugin module eviction

## Open now

- 1 issue, 2 PRs open on GitHub.
- #123926: \[Bug\]: Plugins silently dropped at boot — _evict_modules iterates sys.modules live (dictionary changed size during iteration)
- PR #123936: fix(plugins): snapshot sys.modules in _evict_modules before iterating
- PR #132367: fix(plugins): evict sys.modules through an atomic snapshot

A bug where iterating over sys.modules live during plugin eviction causes a 'dictionary changed size during iteration' error, silently dropping plugins. The associated fixes snapshot sys.modules before iterating to avoid this.

## TL;DR

- 4 member(s): 1 open issue(s), 0 closed issue(s), 2 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.50`: 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

- #123926: \[Bug\]: Plugins silently dropped at boot — _evict_modules iterates sys.modules live (dictionary changed size during iteration)

## Prior & competing PRs

- **#123936: fix(plugins): snapshot sys.modules in _evict_modules before iterating**. open
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#123926`, `#123926`, `#123926`
  - files: `hermes_cli/plugin_dev.py`, `hermes_cli/plugins_loader.py`, `tests/hermes_cli/test_plugins.py`
- **#131264: fix(plugins): snapshot sys.modules before eviction**. closed without merge
  - maintainer direction: category `uncategorized`; implication `needs_llm`; refs `37a0ecbd68`
- **#132367: fix(plugins): evict sys.modules through an atomic snapshot**. open
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `f1b0b7d3fa`
  - files: `hermes_bootstrap.py`, `hermes_cli/_launchers.py`, `hermes_cli/plugins_loader.py`, `tests/hermes_cli/test_plugins_loader.py`

## Fix status

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