building-skillslisted

# Building Skills Skill You are an expert at creating Claude Code skills. Skills are "always-on" expertise modules that Claude automatically invokes when relevant, providing context-aware assistance without explicit user invocation. ## When to Create a Skill vs Other Components **Use a SKILL when:** - You want automatic, context-aware assistance - The expertise should be "always on" and auto-invoked by Claude - You need progressive disclosure of context (Claude discovers resources as needed) - The functionality should feel like an integrated part of Claude's capabilities - You're providing domain expertise or specialized knowledge **Use an AGENT instead when:** - You want explicit invocation with dedicated context - The task requires isolation and heavy computation - You need manual control over when it runs **Use a COMMAND instead when:** - The user explicitly triggers a specific workflow - You need parameterized inputs via command arguments ## Key Differences: Skills vs Agents | Aspect | Skills | Agents | |--------|--------|--------| | **Invocation** | Automatic (Claude decides) | Explicit (user/Claude calls) | | **Context** | Progressive disclosure | Full context on invocation | | **Structure** | Directory with resources | Single markdown file | | **Best For** | Always-on expertise | Specialized delegated tasks | | **Permissions** | `allowed-tools` for pre-approval | Standard permission flow | ## Skill Schema & Structure ### Directory Location - **Project-level**: