Shared Patterns

Overview

Reusable patterns and templates for skill and hook development.

When NOT To Use

• Authoring a skill end to end (use abstract:skill-authoring)
• Cross-plugin contracts, which belong in leyline rather than here

Purpose

This skill provides shared patterns that are referenced by other skills in the abstract plugin. It follows DRY principles by centralizing common patterns.

Pattern Categories

Validation Patterns

See modules/validation-patterns.md for:

• Input validation templates
• Schema validation patterns
• Error reporting formats

Error Handling

See modules/error-handling.md for:

• Exception hierarchies
• Error message formatting
• Recovery strategies

Testing Templates

See modules/testing-templates.md for:

• Unit test scaffolding
• Integration test patterns
• Mock fixtures

Workflow Patterns

See modules/workflow-patterns.md for:

• Checklist templates
• Feedback loop patterns
• Progressive disclosure structures

Usage

Reference these patterns from other skills:

For validation patterns, see the `shared-patterns` skill's
[validation-patterns](../shared-patterns/modules/validation-patterns.md) module.

Verification: Run the command with --help flag to verify availability.

Exit Criteria

• Each of the four module files (validation-patterns.md, error-handling.md, testing-templates.md, workflow-patterns.md) exists under plugins/abstract/skills/shared-patterns/modules/.
• Any cross-skill reference to these modules uses a relative path beginning with ../shared-patterns/modules/ and resolves to an existing file on disk.
• No consuming skill references a path under the deprecated skills/shared/modules/ directory pattern; such references are surfaced as broken links.
• The hub SKILL.md itself stays under 150 lines with no substantive pattern content duplicated from the modules it links.