[Eduardo Villalpando Mello (edvilme)]

Summary

Follow-up to #1941 that extracts venv and uv environment operations into peer backend managers composed under BuiltInEnvironmentManager, while preserving ms-python.python:venv compatibility.

Changes

• VenvEnvironmentManager (src/managers/builtin/venvEnvironmentManager.ts):
  • Owns venv environment features: python -m venv creation, venv / virtualEnv / virtualEnvWrapper classification, and VENV_WORKSPACE_KEY / VENV_GLOBAL_KEY workspace/global selection cache keys.
• UvEnvironmentManager (src/managers/builtin/uvEnvironmentManager.ts):
  • Owns uv environment features: uv venv --verbose --seed --python creation (with scoped getUvExecutable(projectDir)), venvUv / uvWorkspace classification, isUvManagedPythonInstall filtering so standalone uv-managed base Pythons remain in SysPythonManager, 'uv' / 'uv workspace' descriptions, and UV_ENVS_KEY persistence tracking/untracking/cache clearing.
• BuiltInEnvironmentManager (src/managers/builtin/builtInEnvironmentManager.ts, renamed from venvManager.ts):
  • Composes VenvEnvironmentManager and UvEnvironmentManager as peers under the ms-python.python:venv EnvironmentManager registration so nativeFinder.refresh() runs once per refresh and existing settings/identities remain non-breaking.
  • Routes creation via selectBackend(venvRoot, venv, uv) (await shouldUseUv(log, venvRoot.fsPath) ? uv : venv) and delegates discovery classification, descriptions, persistence tracking, removal cleanup, and cache clearing to the peer backends (venvUtils.ts, venvStepBasedFlow.ts).
• SysPythonManager.create quickCreate guard (src/managers/builtin/sysPythonManager.ts):
  • Returns undefined when options?.quickCreate is true so non-interactive quick creation requests against ms-python.python:system do not open an interactive version QuickPick in headless environments when uv is installed.

[Heejae Chang (heejaechang)]

🔒 Automated review in progress — Heejae Chang (@heejaechang) is auto-reviewing this PR.

[Heejae Chang (heejaechang)]

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[Rich Chiodo (rchiodo)]

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[Bill Schnurr (bschnurr)]

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