feat(myah): Catalog capability passthrough + /aux-resolved endpoint

[deestax]

Two Myah-specific additions to the gateway platform adapter, both shipped as Myah marker blocks.

Changes

_build_catalog capability passthrough (1ff4124e, f74a6a2a):

_build_catalog previously emitted curated_models as a plain list[str]. Myah's settings UI needs capability metadata to filter model dropdowns (e.g. only show vision-capable models for the vision aux task). This restructures the list to list[{id, name, capabilities?}] by calling get_model_capabilities(provider, model_id) per model.

A new _build_model_entry(provider, model_id) helper wraps the lookup:

• get_model_capabilities returns None → entry has id and name only (key absent, not None)
• get_model_capabilities raises → log warning with f-string, omit capabilities, catalog still returns
• The 6 real ModelCapabilities fields only: supports_tools, supports_vision, supports_reasoning, context_window, max_output_tokens, model_family

The import of get_model_capabilities is deferred inside the helper, matching the existing deferred-import pattern in _build_catalog.

Rolling-deploy safe: the platform consumer accepts both old-string and new-dict curated_models shapes during a mixed-replica window.

/myah/api/config/aux-resolved endpoint (44abeb00):

New GET /myah/api/config/aux-resolved handler that iterates every aux task in DEFAULT_CONFIG.auxiliary and runs the same resolution chain Hermes uses at aux call time (_resolve_task_provider_model + Step 1 of _resolve_auto). Returns:

{
  "title_generation": {"provider": "openrouter", "model": "google/gemini-3-flash-preview", "source": "config"},
  "vision": {"provider": "anthropic", "model": "claude-opus-4.6", "source": "auto-main"},
  ...
}

source values: config, config-base-url, auto-main, auto-chain, unresolved.

The Myah platform proxies this at GET /api/v1/agent/config/aux-resolved and uses it to show users the exact model each background task will route to in the settings UI, replacing the ambiguous "auto" placeholder.

Tests

4 new tests in tests/gateway/test_myah_management.py covering capability passthrough: happy path, None return, exception handling, and shape assertion. 114 total tests pass.

Compatibility

No changes to any shared upstream file. Both additions are wrapped in Myah markers. The curated_models shape change is a breaking change at the API level, mitigated on the consumer side.

Refs T3-1001

[deestax]

Review: Hermes PR 7 — Catalog capability passthrough + /aux-resolved endpoint

Verdict: Approve / merge when CI clears.

What this PR does

Two additions to myah_management.py, both Myah-marker-wrapped, no changes to shared upstream files.

1. _build_catalog capability passthrough (commits 1ff4124e, f74a6a2a)

curated_models changes from list[str] to list[{id, name, capabilities?}]. The _build_model_entry helper wraps get_model_capabilities() with a deferred import (matching the existing deferred-import pattern at line :1473-1476) and three correct defensive behaviours:

• None return → entry has id + name only, capabilities key absent (not None) — avoids UI null-check ceremony
• Exception → logger.warning(f-string) + omit key — catalog never fails due to a single model lookup
• 6-field cap dict with exactly the 6 real ModelCapabilities fields

Rolling-deploy safe: platform's normalizeCuratedModels() shim in PR 47 accepts both string and dict shapes. Smoke test step 6b checks both shapes.

2. /myah/api/config/aux-resolved endpoint (commit 44abeb00)

Proxies _resolve_task_provider_model for every task in DEFAULT_CONFIG.auxiliary. The source labelling (config, config-base-url, auto-main, auto-chain, unresolved) mirrors Hermes's resolution steps faithfully — users see a debuggable hint instead of "auto".

except Exception at task-loop level correctly isolates failures per task. The outer handler-level except Exception returning 500 allows the platform to translate to {} gracefully (documented in PR 47).

4 new tests cover capability passthrough: happy path, None return, exception, shape assertion. All pass.

CI status

check-attribution: Fixed — daryllnetscher email mapping added in commit fd6a6827b, already pushed to this branch.

test timeout: Cold-runner infra issue (xdist suite hit 10-min job limit). Not a real test failure. Not a blocker.

Minor observations (not blockers)

• main_model.split('/')[0] in handle_get_aux_resolved gives empty main_provider for bare model names like claude-opus-4.6. Pre-existing limitation; PR 47 normalises to dict-form config going forward.

Ready to merge as a dependency of myah PR 47.