feat(config): Add support for config subsection injection in skills

[edenreich]

Summary

• Add support for injecting specific configuration subsections into skills using dotted notation (e.g., config.email, config.database)
• Enable type-safe, scoped access to configuration following principle of least privilege
• Add schema validation to ensure injected config sections are defined in spec.config
• Update Go templates to generate correct constructor parameters and imports for config subsections
• Add comprehensive documentation with examples and benefits

Changes

Schema & Validation (internal/schema/validator.go)

• Add config as a built-in injectable service alongside logger
• Validate that config subsections (e.g., config.email) reference existing sections in spec.config
• Update JSON schema pattern to allow dotted notation in inject arrays

Template Updates

• skill.go.tmpl: Generate struct fields and constructor parameters for config subsections with proper types (e.g., *config.EmailConfig)
• main.go.tmpl: Pass config subsections to skill constructors (e.g., &cfg.Email)

Documentation (README.md)

• Add new "Config Subsection Injection" section with complete examples
• Document injection patterns for logger, config, config.subsection, and services
• List benefits: scoped access, type safety, clear dependencies, easier testing, better separation

Example Usage

spec:
  config:
    email:
      apiKey: ""
      fromAddress: "[email protected]"
  skills:
    - name: send_notification
      inject:
        - logger
        - config.email  # Inject only email config subsection

Test plan

• Validate ADL files with config subsection injection
• Generate projects and verify correct code generation
• Test that skills receive proper config subsection types
• Verify validation catches invalid config section references
• Build generated projects successfully

🤖 Generated with Claude Code

[ig-semantic-release-bot]

🎉 This PR is included in version 0.25.0 🎉

The release is available on:

• v0.25.0
• GitHub release

Your semantic-release bot 📦🚀