L/def gateway

[lorenss-m]

Note

Agents (Claude/Gemini/OpenAI)

• Default to HUD gateway (HUD_API_KEY) via build_gateway_client, fallback to provider keys; clearer "No API key found" errors
• Tests updated to reflect new error message

Environment

• Add _routing_built flag; build routing in _build_routing() and on-demand in _env_list_tools(); reset flag on exit

Scenarios

• Clearer errors: distinguish missing scenarios vs existing scenarios that failed during setup
• More robust prompt arg deserialization using TypeAdapter.validate_json with JSON fallbacks; keeps strings when appropriate

Versioning/Docs

• Bump version to 0.5.4 in hud/version.py, pyproject.toml, tests, and docs/docs.json

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[cursor]

Uninitialized variable accessed after failed prompts lookup

High Severity

The variable scenario_prompts is only defined inside the inner try block (line 195), but the code at line 204 accesses it unconditionally. If list_prompts() raises an exception, the inner except block only assigns available but not scenario_prompts. This causes a NameError when checking if prompt_id in scenario_prompts, crashing the error handling path with a confusing exception instead of the intended helpful error message.

Additional Locations (1)

• hud/environment/scenarios.py#L198-L200