v0.2.0

Experiment-ops now exposes Pi's native SDK through pi-experiment-ops/sdk, with unchanged exports and types. Frontends can depend on experiment-ops for both the SDK and CLI instead of maintaining a separate Pi dependency.

The new workspacePaths(workspace) helper resolves the existing native workspace directories without creating files or changing environment variables. Existing CLI commands, extension replacement keys, configuration formats, and session formats are preserved.

Validation: standalone SDK identity and workspace tests, native TUI/provider integration, real graph execution, and installation from the release tarball.