Extension API Skill

Unified API for domain bundle extensions providing module discovery, build system detection, and command generation. Provides the ExtensionBase abstract base class that all domain extensions must inherit from.

Enforcement

Execution mode: Reference library; load on-demand when creating or modifying extensions.

Prohibited actions:

• Do not modify extension_base.py without updating the contract documentation
• Do not create extensions that bypass ExtensionBase inheritance
• Do not call extension scripts directly; use the executor notation

Constraints:

• All extensions must inherit from ExtensionBase
• Canonical command constants must be used instead of string literals
• CLI commands use python3 .plan/execute-script.py plan-marshall:extension-api:extension_discovery {command} {args}

Purpose