When a new session starts in the gateway (via /new, /reset, or
auto-reset), send the user a summary of the detected configuration:
✨ Session reset! Starting fresh.
◆ Model: qwen3.5:27b-q4_K_M
◆ Provider: custom
◆ Context: 8K tokens (config)
◆ Endpoint: http://localhost:11434/v1
This makes misconfigured context length immediately visible — a user
running a local 8K model that falls to the 128K default will see:
◆ Context: 128K tokens (default — set model.context_length in config to override)
Instead of silently getting no compression and degrading responses.
- _format_session_info() resolves model, provider, context length,
and endpoint from config + runtime, matching the hygiene code's
resolution chain
- Local/custom endpoints shown; cloud endpoints hidden (not useful)
- Context source annotated: config, detected, or default with hint
- Appended to /new and /reset responses, and auto-reset notifications
- 9 tests covering all formatting paths and failure resilience
Addresses the user-facing side of #2708 — instead of trying to fix
every edge case in context detection, surface the values so users
can immediately see when something is wrong.
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