# NousResearch/hermes-agent · Plugin manifest_version mismatch between installer and loader

## Open now

- Nothing open on GitHub.

The plugin installer enforces a lower manifest_version cap than the runtime loader actually supports, causing valid plugins to be rejected at install time. These items address aligning the installer's accepted manifest_version with what the loader handles.

## TL;DR

- 4 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 2 PR(s) closed without merging.
- A fix was merged to main in PR #117451. Verify it addresses your case.
- **Recommended:** read PR #117451 (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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.50`: 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.

## Closed / duplicate issues

- #85879: hermes plugins install refuses manifest_version 2 plugins the runtime loader happily loads

## Prior & competing PRs

- **#117451: feat(providers): external-process providers as standalone model-provider plugins (core half of #105863)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/chat_completion_helpers_relay.py`, `agent/client_lifecycle.py`, `agent/model_metadata.py`, `agent/transports/chat_completions.py`, `agent/usage_pricing.py`, `apps/desktop/src/app/shell/model-catalog-menu.tsx`, `apps/desktop/src/lib/model-status-label.test.ts`, `apps/desktop/src/lib/model-status-label.ts`, `hermes_cli/auth_model_picker.py`, `hermes_cli/model_setup_flows.py`, `hermes_cli/model_switch.py`, `hermes_cli/model_switch_providers.py`, `hermes_cli/models.py`, `hermes_cli/models_validate.py`, `hermes_cli/plugin_dev.py`, `hermes_cli/plugins_cmd.py`, `providers/base.py`, `tests/agent/test_provider_client_cancel.py`, `tests/agent/test_provider_history_parity.py`, `tests/agent/test_stream_reasoning_details.py` (+9 more)
- **#85893: plugins install caps manifest_version at 1 while the runtime loader supports 2**. closed without merge
  - maintainer direction: category `implemented_elsewhere`; implication `superseded`; refs `118984d7a02f8a8baec11255002cbbab7c202e06`, `#117451`, `#85879`
- **#85934: fix(plugins): align installer manifest_version with loader**. closed without merge
  - maintainer direction: category `duplicate_of`; implication `duplicate`; refs `#85893`, `#85934`

## Fix status

- Merged to main in PR #117451 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-20`.
- Subsystem: `hermes_cli`