Add a persisted, backend-confirmed provider/model lock for Hermes
Browser and other session API clients. A confirmed lock is an
execution contract rather than response metadata:
- POST /api/sessions/{session_id}/model validates and persists a
confirmed browser_model_lock (advertised in /v1/capabilities)
- session chat + chat/stream consume the persisted lock on body-only
follow-up turns; a confirmed lock wins over an older gateway session
/model override and the session-persisted model
- a later successful session /model switch explicitly clears and
replaces the lock while preserving lineage markers (_branched_from)
and invalidating cached system-prompt model/provider metadata
- ordinary one-off request overrides never replace a confirmed lock
- provider-resolution failure fails closed as a typed provider-auth
error (controlled response, never global-credential reuse)
- confirmed locks disable the global fallback model chain
- the completed agent's actual provider/model must match the locked
route or the turn fails with a runtime-mismatch error
- responses carry sanitized runtime metadata reporting actual vs
requested provider/model and lock state
Rebased onto the provider-aware request routing (#70853) and
session-model parity (#70931) that landed since the original branch;
the lock now slots into that precedence chain as the top rung.
Salvaged from PR #61236 by @abundantbeing.
Add authenticated GET /api/model/options to the gateway API server,
sharing the dashboard/TUI picker payload builder so external clients
can sync to the user's configured Hermes provider catalog instead of
scraping the single OpenAI-compatible /v1/models alias.
- new shared hermes_cli.inventory.build_model_options_payload() wraps
build_models_payload with the stable picker shape and safe
custom-provider probe policy (probe current only on normal open,
probe all + cache bust on explicit refresh)
- dashboard web_server and TUI gateway model.options refactored onto
the shared builder; dashboard build moved off the event loop via
run_in_threadpool
- capabilities endpoint advertises model_options
- docs for both API server and programmatic integration
Salvaged from PR #54689 by @abundantbeing.
abundantbeing
HexLab98