[Blueprints] Remove v2 experimental compatibility aliases

[adamziel]

What

Remove the retired Blueprint v2 opt-in aliases now that v2 declarations select the native TypeScript path automatically.

• The hidden CLI --experimental-blueprints-v2-runner flag and its v1-option translations are gone.
• WorkerBootOptions.experimentalBlueprintsV2Runner, which was already a no-op, is gone.
• Personal WP no longer gives the retired query parameter special cleanup behavior.
• Auto-mounted themes always emit the normal v1-shaped activation step; the v2 handler already owns the one required shape conversion.

Breaking change

Callers still passing --experimental-blueprints-v2-runner must remove it. Use a v2 declaration for automatic selection, or use --mode to choose create-new-site, apply-to-existing-site, or mount-only. Use --allow=follow-symlinks and --allow=read-local-fs for the capabilities the alias used to infer from old flags.

Code passing experimentalBlueprintsV2Runner in worker boot options must remove that property. It has had no effect since handler selection moved before worker boot.

Testing

• npm exec -- nx run-many -t typecheck -p playground-cli playground-personal-wp playground-remote --parallel=3
• npm exec -- nx run-many -t lint -p playground-cli playground-personal-wp playground-remote --parallel=3
• npm exec -- nx run playground-cli:test-playground-cli --testFiles=mounts.spec.ts
• npx vitest run --config packages/playground/cli/vite.config.ts packages/playground/cli/tests/run-cli.spec.ts -t "should reject the retired experimental v2 flag"
• npm exec -- nx test playground-personal-wp --testFile=landing-page.spec.ts

Stack

1. [Blueprints] Load v2 WordPress data-reference sources #4005
2. [Website] Report Blueprint v2 analytics events #4006
3. This PR

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Removes the retired Blueprint v2 experimental compatibility aliases across CLI, worker boot options, and Personal WP URL handling now that v2 declarations automatically select the native TypeScript path.

Changes:

• Drops the hidden CLI --experimental-blueprints-v2-runner flag and removes related handler-selection/translation logic.
• Removes the no-op experimentalBlueprintsV2Runner worker boot option and stops stripping the retired query param from Personal WP URLs.
• Updates/adjusts tests and auto-mount theme activation step emission to always use the v1-shaped step.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/playground/remote/src/lib/playground-worker-endpoint.ts	Removes deprecated/no-op worker boot option.
packages/playground/personal-wp/src/lib/state/url/router.ts	Stops stripping the retired v2 opt-in query parameter from URLs.
packages/playground/personal-wp/src/lib/state/url/landing-page.spec.ts	Updates landing-page behavior expectation for retired query param.
packages/playground/cli/tests/run-cli.spec.ts	Changes CLI test to assert the retired flag is rejected.
packages/playground/cli/tests/mounts.spec.ts	Removes v2-runner-specific auto-mount step-shape test.
packages/playground/cli/src/run-cli.ts	Removes CLI flag + translation logic and removes handler-selection alias branch.
packages/playground/cli/src/mounts.ts	Always emits v1-shaped activateTheme step (themeFolderName).

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