## What changed
Set `deferred_environment` to `true` in cloud thread prewarm requests when a project is selected. Omit the field for default thread prewarming.
## Testing
Update the prewarm request encoding test to verify that only requests with a selected project include the deferred readiness flag.
GitOrigin-RevId: e10a646ebde9cc3acbdb01b304af0f73ecc1dbeb
## What changed
Pass the local project's GitHub origin to cloud prewarming so new cloud threads can provision a repository checkout. Preserve the attached local project when switching backends and resolve its origin for each thread start.
Normalize supported GitHub origins to credential-free HTTPS URLs and select a repository-specific cloud working directory. Unsupported origins retain the blank environment behavior. Keep project metadata outside the app-server wire protocol, and fix HTTP Git URL parsing so query strings and fragments cannot be mistaken for authority text.
## Testing
Add coverage for project routing, origin normalization and rejection, managed environment encoding, local project retention, and Git URL credential stripping.
GitOrigin-RevId: 5859769965faf060461ccc1cbb3fd48f8e2f2155
## What changed
Add `Client::prewarm_default_thread` to prepare an ordinary coding thread in the default managed cloud environment, with optional model and provider selection. Return the thread identity and resolved settings as `ThreadActivation` without a separate activation RPC, preserving unknown thread protobuf fields.
Send prewarm requests once without automatic retries or cleanup, and document that a failed response can leave a prepared thread whose identity the caller did not receive.
## Testing
Add coverage for default and explicit model/provider requests, resolved settings and native thread metadata preservation, and rejection of responses missing sandbox policy.
GitOrigin-RevId: 425ee5ee6bb30ec77ebdd0079955701a7f9704e4
Benjamin Carlsson