CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Repository Overview

This is a best practices repository for Claude Code configuration, demonstrating patterns for skills, subagents, hooks, and commands. It serves as a reference implementation rather than an application codebase.

Key Components

Weather System (Example Workflow)

A demonstration of two distinct skill patterns via the Command → Agent → Skill architecture:

• /weather-orchestrator command (.claude/commands/weather-orchestrator.md): Entry point — asks user for C/F, invokes agent, then invokes SVG skill
• weather-agent agent (.claude/agents/weather-agent.md): Fetches temperature using its preloaded weather-fetcher skill (agent skill pattern)
• weather-fetcher skill (.claude/skills/weather-fetcher/SKILL.md): Preloaded into agent — instructions for fetching temperature from Open-Meteo
• weather-svg-creator skill (.claude/skills/weather-svg-creator/SKILL.md): Skill — creates SVG weather card, writes orchestration-workflow/weather.svg and orchestration-workflow/output.md

Two skill patterns: agent skills (preloaded via skills: field) vs skills (invoked via Skill tool). See orchestration-workflow/orchestration-workflow.md for the complete flow diagram.

Skill Definition Structure

Skills in .claude/skills/<name>/SKILL.md use YAML frontmatter:

• name: Display name and /slash-command (defaults to directory name)
• description: When to invoke (recommended for auto-discovery)
• argument-hint: Autocomplete hint (e.g., [issue-number])
• disable-model-invocation: Set true to prevent automatic invocation
• user-invocable: Set false to hide from / menu (background knowledge only)
• allowed-tools: Tools allowed without permission prompts when skill is active
• model: Model to use when skill is active
• context: Set to fork to run in isolated subagent context
• agent: Subagent type for context: fork (default: general-purpose)
• hooks: Lifecycle hooks scoped to this skill

Presentation System

See .claude/rules/presentation.md — all presentation work is delegated to the presentation-curator agent.

Hooks System

Cross-platform sound notification system in .claude/hooks/:

• scripts/hooks.py: Main handler for Claude Code hook events
• config/hooks-config.json: Shared team configuration
• config/hooks-config.local.json: Personal overrides (git-ignored)
• sounds/: Audio files organized by hook event (generated via ElevenLabs TTS)

Hook events configured in .claude/settings.json: PreToolUse, PostToolUse, UserPromptSubmit, Notification, Stop, SubagentStart, SubagentStop, PreCompact, SessionStart, SessionEnd, Setup, PermissionRequest, TeammateIdle, TaskCompleted, ConfigChange.

Special handling: git commits trigger pretooluse-git-committing sound.

Critical Patterns

Subagent Orchestration

Subagents cannot invoke other subagents via bash commands. Use the Agent tool (renamed from Task in v2.1.63; Task(...) still works as an alias):

Agent(subagent_type="agent-name", description="...", prompt="...", model="haiku")

Be explicit about tool usage in subagent definitions. Avoid vague terms like "launch" that could be misinterpreted as bash commands.

Subagent Definition Structure

Subagents in .claude/agents/*.md use YAML frontmatter:

• name: Subagent identifier
• description: When to invoke (use "PROACTIVELY" for auto-invocation)
• tools: Comma-separated allowlist of tools (inherits all if omitted). Supports Agent(agent_type) syntax
• disallowedTools: Tools to deny, removed from inherited or specified list
• model: Model alias: haiku, sonnet, opus, or inherit (default: inherit)
• permissionMode: Permission mode (e.g., "acceptEdits", "plan", "bypassPermissions")
• maxTurns: Maximum agentic turns before the subagent stops
• skills: List of skill names to preload into agent context
• mcpServers: MCP servers for this subagent (server names or inline configs)
• hooks: Lifecycle hooks scoped to this subagent (all hook events are supported; PreToolUse, PostToolUse, and Stop are the most common)
• memory: Persistent memory scope — user, project, or local (see reports/claude-agent-memory.md)
• background: Set to true to always run as a background task
• effort: Effort level override: low, medium, high, max (default: inherits from session)
• isolation: Set to "worktree" to run in a temporary git worktree
• color: CLI output color for visual distinction

Configuration Hierarchy

1. Managed (managed-settings.json / MDM plist / Registry): Organization-enforced, cannot be overridden
2. Command line arguments: Single-session overrides
3. .claude/settings.local.json: Personal project settings (git-ignored)
4. .claude/settings.json: Team-shared settings
5. ~/.claude/settings.json: Global personal defaults
6. hooks-config.local.json overrides hooks-config.json

Disable Hooks

Set "disableAllHooks": true in .claude/settings.local.json, or disable individual hooks in hooks-config.json.

Answering Best Practice Questions

When the user asks a Claude Code best practice question, always search this repo first (best-practice/, reports/, tips/, implementation/, and README.md) before relying on training knowledge or external sources. This repo is the authoritative source — only fall back to external docs or web search if the answer is not found here.

Workflow Best Practices

From experience with this repository:

• Keep CLAUDE.md under 200 lines per file for reliable adherence
• Use commands for workflows instead of standalone agents
• Create feature-specific subagents with skills (progressive disclosure) rather than general-purpose agents
• Perform manual /compact at ~50% context usage
• Start with plan mode for complex tasks
• Use human-gated task list workflow for multi-step tasks
• Break subtasks small enough to complete in under 50% context

Debugging Tips

• Use /doctor for diagnostics
• Run long-running terminal commands as background tasks for better log visibility
• Use browser automation MCPs (Claude in Chrome, Playwright, Chrome DevTools) for Claude to inspect console logs
• Provide screenshots when reporting visual issues

Documentation

See .claude/rules/markdown-docs.md for documentation standards. Key docs:

• best-practice/claude-subagents.md: Subagent frontmatter, hooks, and repository agents
• best-practice/claude-commands.md: Slash command patterns and built-in command reference
• orchestration-workflow/orchestration-workflow.md: Weather system flow diagram