[rbehal]

Summary

In Gumloop sandboxes the SDK will reach the stream host through the orchestrator's credential proxy, at GUMLOOP_STREAM_BASE_URL=http://192.0.2.1/bound/gumloop-ws/api/v1. Voice session start and end use post_to_stream_host(origin=True), which replaced the whole base path with /gummies/.... That dropped /bound/gumloop-ws, so those calls would land on the proxy's API and get a 404.

origin=True now strips only a trailing /api/v1 and keeps any prefix mounted above it. Otherwise nothing changes: https://ws.gumloop.com/api/v1 still resolves to the host root, and a custom base like /custom/v2 still resolves to the root, as the existing test expects.

The sandbox template pins gumloop==0.5.6; it needs a release with this fix and a template bump before the backend turns on the proxy for SDK calls.

Part of INFRA-19

Test plan

• New test_voice_keeps_a_path_prefix_mounted_above_api_v1 (sync and async).
• scripts/check: ruff format, ruff, pyright, uv lock check, and pytest (872 passed; the 19 errors are tests/integration/test_live.py, which needs live credentials).

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Raised from ws-rbehal

Made with Cursor

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.