# NousResearch/hermes-agent · Per-provider session affinity header opt-in feature

## Open now

- Nothing open on GitHub.

These items cover adding an opt-in per-provider configuration to forward a session affinity header (e.g. a session ID) to custom gateway endpoints. The feature allows providers like LiteLLM to receive conversation scope via a configurable header name.

## TL;DR

- 3 member(s): 0 open issue(s), 1 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 #115904. Verify it addresses your case.
- **Recommended:** read PR #115904 (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: `resolved` · deciding PR(s): `pr-115904`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Closed / duplicate issues

- #104449: \[Feature\]: Per-provider \`session_affinity_header\` — send the conversation affinity scope to custom gateway endpoints (e.g. LiteLLM \`x-litellm-session-id\`)

## Prior & competing PRs

- **#115904: feat(providers): custom providers can carry the Hermes session id as an opt-in header (#86241, salvage #104566, supersedes #114496)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `agent/auxiliary_client.py`, `agent/chat_completion_helpers.py`, `agent/opencode_affinity.py`, `cli-config.yaml.example`, `hermes_cli/config.py`, `hermes_cli/config_providers.py`, `tests/agent/test_session_affinity_header.py`, `tests/hermes_cli/test_gateway_migrate_multiplex.py`, `tests/hermes_cli/test_web_server_idle_proof.py`, `website/docs/integrations/providers.md`, `website/docs/user-guide/configuring-models.md`
- **#104566: feat(agent): per-provider session_affinity_header (#104449)**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `d6d9fac694db`, `#115904`, `#86241`, `#104566`, `#114496`

## Fix status

- Merged to main in PR #115904 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-19`.