# NousResearch/hermes-agent · Plugin module eviction iterating live sys.modules during concurrent imports

## Open now

- 1 issue, 1 PR open on GitHub.
- #131817: Plugin loads fail in batches: "dictionary changed size during iteration" from _evict_modules() iterating the live sys.modules
- PR #132367: fix(plugins): evict sys.modules through an atomic snapshot

One issue reports plugin loads failing with a "dictionary changed size during iteration" error from _evict_modules() iterating the live sys.modules. Two pull requests propose snapshotting sys.modules before eviction; their status and effectiveness are not stated in the titles.

## TL;DR

- 3 member(s): 1 open issue(s), 0 closed issue(s), 1 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.67`: 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

- #131817: Plugin loads fail in batches: "dictionary changed size during iteration" from _evict_modules() iterating the live sys.modules

## Prior & competing PRs

- **#131840: fix(plugins): snapshot sys.modules before eviction to survive concurrent imports**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `#132367`, `#131817`, `#132259`
- **#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  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `f1b0b7d3fa`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: `hermes_cli`