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The docs site (Vercel) serves /docs/api/model-catalog.json behind a bot mitigation rule that returns HTTP 403 + x-vercel-mitigated: challenge for non-browser User-Agents — including urllib (what the CLI uses) and curl. When that happens, get_catalog() falls back to the stale disk cache and new model releases (Opus 4.8, etc.) never reach the /model picker even though they're already in OPENROUTER_MODELS and the live OpenRouter API. Adds a fallback URL chain: when the primary catalog URL fails, walk DEFAULT_CATALOG_FALLBACK_URLS — currently the raw.githubusercontent.com copy of the same file. GitHub raw doesn't bot-gate, so the manifest stays reachable through Vercel firewall hiccups. Per-provider override URLs keep their direct-fetch semantics (operators configure those specifically, no implicit fallback). Also swaps stepfun/step-3.5-flash for stepfun/step-3.7-flash in the OpenRouter + Nous Portal curated picker lists. Native stepfun provider configuration (api.stepfun.ai) is left alone — that depends on what stepfun.ai itself serves, not what OpenRouter routes. Test plan: 5 new TestFallbackChain tests cover primary-success, primary-failure-fallback-success, all-fail, primary==fallback-dedup, and end-to-end get_catalog routing through the new helper. Existing 23 tests in test_model_catalog.py still pass (28 total). Wider tests/hermes_cli/ sweep: 5701/5701 pass. |
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