Claude Code Conventions — Reference
Model & Reasoning Selection
Caching & Context Discipline
2. CACHE BREAKPOINTS
- Up to 4
cache_controlbreakpoints are supported. - The final breakpoint belongs on the last block that remains identical across requests.
- Agentic loops use 1-hour TTL to prevent cache expiration between turns.
Artifact Schemas
Skill Frontmatter
name: {lowercase-hyphens}
description: {triggering-only, third person}
effort: {low | medium | high | xhigh | max}
disable-model-invocation: {boolean}
user-invocable: {boolean}
Agent Frontmatter
name: {identifier}
description: {action-oriented trigger}
effort: {high for architects, medium for workers}
isolation: worktree
skills: [sk-4d-method, sk-spec-driven-development]
Progressive Disclosure Checklist
Reference Files
sk-pipeline-state/SKILL.md— State management rules.sk-pipeline-paths/SKILL.md— Scope-aware path resolution.sk-4d-method/SKILL.md— Per-invocation wrapper.sk-spec-driven-development/SKILL.md— SDD protocol.