Teknium 58ca875e19 feat(gateway): surface session config on /new, /reset, and auto-reset (#3321) ...

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.

2026-03-26 19:27:58 -07:00

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