Disambiguate AI Gateway probe failures by status code#87
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Auth-shaped failures (400 Invalid Token / 401 / 403) now point users at re-login instead of the misleading "AI Gateway V2 not available" message; 404 keeps the docs-link guidance for genuinely-unprovisioned workspaces. The HTTP body is also surfaced in the bubbled reason so callers (and the user) see "Invalid Token" without UCODE_DEBUG=1. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
AarushiShah-db
approved these changes
May 26, 2026
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Summary
Diagnostic-only improvement for #84.
ensure_ai_gateway_v2previously collapsed every non-200 response into a single misleading error:"Databricks AI Gateway V2 is required but not available on this workspace (HTTP 400 Bad Request). See <docs>". The actual cause (oftenInvalid Tokenfrom a staleDATABRICKS_CONFIG_PROFILEshadowing--host) was only visible withUCODE_DEBUG=1._http_get_json(databricks.py:194): append a 200-char body excerpt to thereasonit returns, so callers and the user-visible error seeInvalid Tokenwithout UCODE_DEBUG.ensure_ai_gateway_v2(databricks.py:826): branch on the reason —400+ body containingInvalid Token, or401/403→"Databricks rejected the access token for <ws> ... Try: databricks auth logout / login --host <ws>"404→"Databricks Unity AI Gateway is not enabled on this workspace ... See <docs>"Does not fix the underlying
DATABRICKS_CONFIG_PROFILE-shadowing---hostbug —ucode configurestill fails in Dhruv's repro, just with an accurate, actionable error pointing at re-login. The env-var pop fix is deferred (since it overlaps with the profile-threading work in #86).Test plan
uv run pytest— 539 pass / 25 skipuv run ruff check .cleantests/test_databricks.pycovering: 400 +Invalid Token, 401, 404, 400 withoutInvalid Token, and_http_get_jsonbody surfacing in the reason