# NousResearch/hermes-agent · Runtime overrides via pre_llm_call plugin hooks

## Open now

- 1 issue, 1 PR open on GitHub.
- #23739: feat(agent): allow pre_llm_call plugins to override model/provider/system_prompt at runtime
- PR #99053: feat(agent): allow pre_llm_call plugins to override the model at runtime

These issues and PRs add support for plugins to override model, provider, and system prompt settings at runtime during the pre_llm_call stage. Coverage extends to the Hermes ARC runtime and general plugin override mechanisms.

## TL;DR

- 5 member(s): 1 open issue(s), 0 closed issue(s), 1 open PR(s), 0 merged PR(s), 3 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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 `0.40`: 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

- #23739: feat(agent): allow pre_llm_call plugins to override model/provider/system_prompt at runtime

## Prior & competing PRs

- **#23898: feat: support plugin runtime overrides**. closed without merge · fix tier `suggested`
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - _suggested-tier fix detail withheld; re-request with `?tier=all` to include it._
- **#23744: feat(agent): allow pre_llm_call runtime overrides**. closed without merge
  - maintainer direction: category `silent_close`; implication `active`
- **#92893: feat(agent): pre_llm_call runtime_override (#23739)**. closed without merge
  - maintainer direction: category `superseded_by_pr`; implication `superseded`; refs `#99053`
- **#99053: feat(agent): allow pre_llm_call plugins to override the model at runtime**. open
  - maintainer direction: category `merged_via`; implication `superseded`; refs `8a7d4b60c24b3f1129843ecd8998ab9993f97f75`, `1744a19e0df568c647e4f3ff9c37f2a284a282fb`, `71704ffb498f6c19efcd5aa671d7c15e26aa53fa`, `11b57f34b8c1ce9885ae89db3d726105cd1c3fed`, `#23739`, `#98703`, `#90432`, `#57664`
  - files: `agent/agent_runtime_helpers.py`, `agent/chat_completion_helpers.py`, `agent/client_lifecycle.py`, `agent/context_compressor.py`, `agent/conversation_compression.py`, `agent/conversation_loop.py`, `agent/ephemeral_model_projection.py`, `agent/runtime_override.py`, `agent/turn_api_call.py`, `agent/turn_context.py`, `hermes_state_usage.py`, `tests/agent/test_runtime_override.py`, `tests/agent/test_runtime_override_boundary_handoffs.py`, `tests/agent/test_runtime_override_compaction_commit.py`, `tests/agent/test_runtime_override_compressor_usage.py`, `tests/agent/test_runtime_override_credential_restore.py`, `tests/agent/test_runtime_override_model_validation.py`, `tests/agent/test_runtime_override_redteam_sqlite.py`, `tests/agent/test_runtime_override_session_identity.py`, `tests/e2e/test_runtime_override_e2e.py` (+3 more)

## Fix status

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