teknium1 5ae0b731d0 fix: harden auxiliary model config — gateway bridge, vision safety, tests ...

Improvements on top of PR #606 (auxiliary model configuration):

1. Gateway bridge: Added auxiliary.* and compression.summary_provider
   config bridging to gateway/run.py so config.yaml settings work from
   messaging platforms (not just CLI). Matches the pattern in cli.py.

2. Vision auto-fallback safety: In auto mode, vision now only tries
   OpenRouter + Nous Portal (known multimodal-capable providers).
   Custom endpoints, Codex, and API-key providers are skipped to avoid
   confusing errors from providers that don't support vision input.
   Explicit provider override (AUXILIARY_VISION_PROVIDER=main) still
   allows using any provider.

3. Comprehensive tests (46 new):
   - _get_auxiliary_provider env var resolution (8 tests)
   - _resolve_forced_provider with all provider types (8 tests)
   - Per-task provider routing integration (4 tests)
   - Vision auto-fallback safety (7 tests)
   - Config bridging logic (11 tests)
   - Gateway/CLI bridge parity (2 tests)
   - Vision model override via env var (2 tests)
   - DEFAULT_CONFIG shape validation (4 tests)

4. Docs: Added auxiliary_client.py to AGENTS.md project structure.
   Updated module docstring with separate text/vision resolution chains.

Tests: 2429 passed (was 2383).

2026-03-08 18:06:47 -07:00

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