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docs(skill): claude-code v2.2 — add cheat sheet commands, env vars, rules, advanced features (#5158)

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Expands the claude-code skill with content from official docs and community
cheat sheets that was missing from v2.0:

Slash commands: /cost, /btw, /plan, /loop, /batch, /security-review,
  /resume, /effort (with auto level), /mcp, /release-notes, /voice details
Keyboard shortcuts: Alt+P (model), Alt+T (thinking), Alt+O (fast mode),
  Ctrl+V (paste image), Ctrl+O (transcript), Ctrl+G (external editor)
Ultrathink keyword for max reasoning on a specific turn
Rules directory: .claude/rules/*.md and ~/.claude/rules/*.md
Auto-memory: ~/.claude/projects/<proj>/memory/ (25KB/200 lines limit)
Environment variables: CLAUDE_CODE_EFFORT_LEVEL, MAX_THINKING_TOKENS,
  CLAUDE_CODE_NO_FLICKER, CLAUDE_CODE_SUBPROCESS_ENV_SCRUB
MCP limits: 2KB tool desc cap, maxResultSizeChars 500K, transport types
Reorganized slash commands into Session/Development/Configuration groups
Reorganized keyboard shortcuts into Controls/Toggles/Multiline groups
This commit is contained in:
Teknium
2026-04-04 19:15:57 -07:00
committed by GitHub
parent 85cefc7a5a
commit 0fd3de2674
1 changed files with 414 additions and 130 deletions
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544
skills/autonomous-ai-agents/claude-code/SKILL.md
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@@ -1,7 +1,7 @@
---
name: claude-code
description: Delegate coding tasks to Claude Code (Anthropic's CLI agent). Use for building features, refactoring, PR reviews, and iterative coding. Requires the claude CLI installed.
version: 2.0.0
version: 2.2.0
author: Hermes Agent + Teknium
license: MIT
metadata:
@@ -18,7 +18,12 @@ Delegate coding tasks to [Claude Code](https://code.claude.com/docs/en/cli-refer
- **Install:** `npm install -g @anthropic-ai/claude-code`
- **Auth:** run `claude` once to log in (browser OAuth for Pro/Max, or set `ANTHROPIC_API_KEY`)
- **Console auth:** `claude auth login --console` for API key billing
- **SSO auth:** `claude auth login --sso` for Enterprise
- **Check status:** `claude auth status` (JSON) or `claude auth status --text` (human-readable)
- **Health check:** `claude doctor` — checks auto-updater and installation health
- **Version check:** `claude --version` (requires v2.x+)
- **Update:** `claude update` or `claude upgrade`
## Two Orchestration Modes
@@ -110,6 +115,30 @@ terminal(command="sleep 15 && tmux capture-pane -t claude-work -p -S -60")
**Note:** After the first trust acceptance for a directory, the trust dialog won't appear again. Only the permissions dialog recurs each time you use `--dangerously-skip-permissions`.
## CLI Subcommands
| Subcommand | Purpose |
|------------|---------|
| `claude` | Start interactive REPL |
| `claude "query"` | Start REPL with initial prompt |
| `claude -p "query"` | Print mode (non-interactive, exits when done) |
| `cat file \| claude -p "query"` | Pipe content as stdin context |
| `claude -c` | Continue the most recent conversation in this directory |
| `claude -r "id"` | Resume a specific session by ID or name |
| `claude auth login` | Sign in (add `--console` for API billing, `--sso` for Enterprise) |
| `claude auth status` | Check login status (returns JSON; `--text` for human-readable) |
| `claude mcp add <name> -- <cmd>` | Add an MCP server |
| `claude mcp list` | List configured MCP servers |
| `claude mcp remove <name>` | Remove an MCP server |
| `claude agents` | List configured agents |
| `claude doctor` | Run health checks on installation and auto-updater |
| `claude update` / `claude upgrade` | Update Claude Code to latest version |
| `claude remote-control` | Start server to control Claude from claude.ai or mobile app |
| `claude install [target]` | Install native build (stable, latest, or specific version) |
| `claude setup-token` | Set up long-lived auth token (requires subscription) |
| `claude plugin` / `claude plugins` | Manage Claude Code plugins |
| `claude auto-mode` | Inspect auto mode classifier configuration |
## Print Mode Deep Dive
### Structured JSON Output
@@ -129,11 +158,33 @@ Returns a JSON object with:
"duration_ms": 10276,
"stop_reason": "end_turn",
"terminal_reason": "completed",
"usage": { "input_tokens": 5, "output_tokens": 603, ... }
"usage": { "input_tokens": 5, "output_tokens": 603, ... },
"modelUsage": { "claude-sonnet-4-6": { "costUSD": 0.078, "contextWindow": 200000 } }
}
```
Use `session_id` to resume later. `num_turns` shows how many agentic loops it took. `total_cost_usd` tracks spend.
**Key fields:** `session_id` for resumption, `num_turns` for agentic loop count, `total_cost_usd` for spend tracking, `subtype` for success/error detection (`success`, `error_max_turns`, `error_budget`).
### Streaming JSON Output
For real-time token streaming, use `stream-json` with `--verbose`:
```
terminal(command="claude -p 'Write a summary' --output-format stream-json --verbose --include-partial-messages", timeout=60)
```
Returns newline-delimited JSON events. Filter with jq for live text:
```
claude -p "Explain X" --output-format stream-json --verbose --include-partial-messages | \
jq -rj 'select(.type == "stream_event" and .event.delta.type? == "text_delta") | .event.delta.text'
```
Stream events include `system/api_retry` with `attempt`, `max_retries`, and `error` fields (e.g., `rate_limit`, `billing_error`).
### Bidirectional Streaming
For real-time input AND output streaming:
```
claude -p "task" --input-format stream-json --output-format stream-json --replay-user-messages
```
`--replay-user-messages` re-emits user messages on stdout for acknowledgment.
### Piped Input
```
@@ -152,7 +203,7 @@ terminal(command="git diff HEAD~3 | claude -p 'Summarize these changes' --max-tu
terminal(command="claude -p 'List all functions in src/' --output-format json --json-schema '{\"type\":\"object\",\"properties\":{\"functions\":{\"type\":\"array\",\"items\":{\"type\":\"string\"}}},\"required\":[\"functions\"]}' --max-turns 5", workdir="/project", timeout=90)
```
Parse `structured_output` from the JSON result.
Parse `structured_output` from the JSON result. Claude validates output against the schema before returning.
### Session Continuation
```
@@ -164,6 +215,9 @@ terminal(command="claude -p 'Continue and add connection pooling' --resume $(cat
# Or resume the most recent session in the same directory
terminal(command="claude -p 'What did you do last time?' --continue --max-turns 1", workdir="/project", timeout=30)
# Fork a session (new ID, keeps history)
terminal(command="claude -p 'Try a different approach' --resume <id> --fork-session --max-turns 10", workdir="/project", timeout=120)
```
### Bare Mode for CI/Scripting
@@ -173,115 +227,243 @@ terminal(command="claude --bare -p 'Run all tests and report failures' --allowed
`--bare` skips hooks, plugins, MCP discovery, and CLAUDE.md loading. Fastest startup. Requires `ANTHROPIC_API_KEY` (skips OAuth).
## Key Flags Reference
To selectively load context in bare mode:
| To load | Flag |
|---------|------|
| System prompt additions | `--append-system-prompt "text"` or `--append-system-prompt-file path` |
| Settings | `--settings <file-or-json>` |
| MCP servers | `--mcp-config <file-or-json>` |
| Custom agents | `--agents '<json>'` |
### Essential Flags
| Flag | Effect | Mode |
|------|--------|------|
| `-p, --print` | Non-interactive one-shot mode | Both |
| `-c, --continue` | Resume most recent conversation | Both |
| `-r, --resume <id>` | Resume specific session by ID | Both |
| `--model <alias>` | Model selection: `sonnet`, `opus`, `haiku`, or full name | Both |
| `--effort <level>` | Reasoning depth: `low`, `medium`, `high`, `max` | Both |
| `--max-turns <n>` | Limit agentic loops (prevents runaway) | Print only |
| `--max-budget-usd <n>` | Cap API spend in dollars | Print only |
### Fallback Model for Overload
```
terminal(command="claude -p 'task' --fallback-model haiku --max-turns 5", timeout=90)
```
Automatically falls back to the specified model when the default is overloaded (print mode only).
### Permission & Safety Flags
## Complete CLI Flags Reference
### Session & Environment
| Flag | Effect |
|------|--------|
| `--dangerously-skip-permissions` | Auto-approve ALL tool use (file writes, bash, etc.) |
| `-p, --print` | Non-interactive one-shot mode (exits when done) |
| `-c, --continue` | Resume most recent conversation in current directory |
| `-r, --resume <id>` | Resume specific session by ID or name (interactive picker if no ID) |
| `--fork-session` | When resuming, create new session ID instead of reusing original |
| `--session-id <uuid>` | Use a specific UUID for the conversation |
| `--no-session-persistence` | Don't save session to disk (print mode only) |
| `--add-dir <paths...>` | Grant Claude access to additional working directories |
| `-w, --worktree [name]` | Run in an isolated git worktree at `.claude/worktrees/<name>` |
| `--tmux` | Create a tmux session for the worktree (requires `--worktree`) |
| `--ide` | Auto-connect to a valid IDE on startup |
| `--chrome` / `--no-chrome` | Enable/disable Chrome browser integration for web testing |
| `--from-pr [number]` | Resume session linked to a specific GitHub PR |
| `--file <specs...>` | File resources to download at startup (format: `file_id:relative_path`) |
### Model & Performance
| Flag | Effect |
|------|--------|
| `--model <alias>` | Model selection: `sonnet`, `opus`, `haiku`, or full name like `claude-sonnet-4-6` |
| `--effort <level>` | Reasoning depth: `low`, `medium`, `high`, `max`, `auto` | Both |
| `--max-turns <n>` | Limit agentic loops (print mode only; prevents runaway) |
| `--max-budget-usd <n>` | Cap API spend in dollars (print mode only) |
| `--fallback-model <model>` | Auto-fallback when default model is overloaded (print mode only) |
| `--betas <betas...>` | Beta headers to include in API requests (API key users only) |
### Permission & Safety
| Flag | Effect |
|------|--------|
| `--dangerously-skip-permissions` | Auto-approve ALL tool use (file writes, bash, network, etc.) |
| `--allow-dangerously-skip-permissions` | Enable bypass as an *option* without enabling it by default |
| `--permission-mode <mode>` | `default`, `acceptEdits`, `plan`, `auto`, `dontAsk`, `bypassPermissions` |
| `--allowedTools <tools>` | Whitelist specific tools: `"Read,Edit,Bash"` |
| `--disallowedTools <tools>` | Blacklist specific tools |
| `--allowedTools <tools...>` | Whitelist specific tools (comma or space-separated) |
| `--disallowedTools <tools...>` | Blacklist specific tools |
| `--tools <tools...>` | Override built-in tool set (`""` = none, `"default"` = all, or tool names) |
### Output & Integration Flags
### Output & Input Format
| Flag | Effect |
|------|--------|
| `--output-format <fmt>` | `text` (default), `json` (structured), `stream-json` (streaming) |
| `--output-format <fmt>` | `text` (default), `json` (single result object), `stream-json` (newline-delimited) |
| `--input-format <fmt>` | `text` (default) or `stream-json` (real-time streaming input) |
| `--json-schema <schema>` | Force structured JSON output matching a schema |
| `--verbose` | Full turn-by-turn output |
| `--bare` | Skip hooks/plugins/MCP/CLAUDE.md for fast scripting |
| `--append-system-prompt <text>` | Add instructions to the system prompt (preserves built-ins) |
| `--system-prompt <text>` | REPLACE the entire system prompt (use --append instead usually) |
| `--add-dir <path>` | Grant access to additional directories |
| `-w, --worktree <name>` | Run in an isolated git worktree |
| `--include-partial-messages` | Include partial message chunks as they arrive (stream-json + print) |
| `--replay-user-messages` | Re-emit user messages on stdout (stream-json bidirectional) |
### Tool Name Syntax for --allowedTools
- `Read` — file reading
- `Edit` — file editing
- `Write` — file creation
- `Bash` — shell commands
- `Bash(git *)` — only git commands
- `Bash(npm run lint:*)` — pattern matching
- `WebSearch` — web search capability
### System Prompt & Context
| Flag | Effect |
|------|--------|
| `--append-system-prompt <text>` | **Add** to the default system prompt (preserves built-in capabilities) |
| `--append-system-prompt-file <path>` | **Add** file contents to the default system prompt |
| `--system-prompt <text>` | **Replace** the entire system prompt (use --append instead usually) |
| `--system-prompt-file <path>` | **Replace** the system prompt with file contents |
| `--bare` | Skip hooks, plugins, MCP discovery, CLAUDE.md, OAuth (fastest startup) |
| `--agents '<json>'` | Define custom subagents dynamically as JSON |
| `--mcp-config <path>` | Load MCP servers from JSON file (repeatable) |
| `--strict-mcp-config` | Only use MCP servers from `--mcp-config`, ignoring all other MCP configs |
| `--settings <file-or-json>` | Load additional settings from a JSON file or inline JSON |
| `--setting-sources <sources>` | Comma-separated sources to load: `user`, `project`, `local` |
| `--plugin-dir <paths...>` | Load plugins from directories for this session only |
| `--disable-slash-commands` | Disable all skills/slash commands |
## Interactive Session Patterns
### Debugging
| Flag | Effect |
|------|--------|
| `-d, --debug [filter]` | Enable debug logging with optional category filter (e.g., `"api,hooks"`, `"!1p,!file"`) |
| `--debug-file <path>` | Write debug logs to file (implicitly enables debug mode) |
### Multi-Turn Development Cycle
### Agent Teams
| Flag | Effect |
|------|--------|
| `--teammate-mode <mode>` | How agent teams display: `auto`, `in-process`, or `tmux` |
| `--brief` | Enable `SendUserMessage` tool for agent-to-user communication |
### Tool Name Syntax for --allowedTools / --disallowedTools
```
# 1. Create tmux session
terminal(command="tmux new-session -d -s dev -x 140 -y 40")
# 2. Launch Claude in project
terminal(command="tmux send-keys -t dev 'cd ~/myproject && claude' Enter")
terminal(command="sleep 5") # Wait for welcome screen
# 3. First task: implement feature
terminal(command="tmux send-keys -t dev 'Implement a caching layer for the API client in src/client.py' Enter")
terminal(command="sleep 30 && tmux capture-pane -t dev -p -S -60") # Check progress
# 4. Follow-up: add tests
terminal(command="tmux send-keys -t dev 'Now write comprehensive tests for the cache' Enter")
terminal(command="sleep 20 && tmux capture-pane -t dev -p -S -40")
# 5. Follow-up: run tests
terminal(command="tmux send-keys -t dev 'Run the tests and fix any failures' Enter")
terminal(command="sleep 20 && tmux capture-pane -t dev -p -S -40")
# 6. Compact context if running long
terminal(command="tmux send-keys -t dev '/compact focus on the caching implementation' Enter")
# 7. Exit
terminal(command="tmux send-keys -t dev '/exit' Enter")
terminal(command="sleep 2 && tmux kill-session -t dev")
Read # All file reading
Edit # File editing (existing files)
Write # File creation (new files)
Bash # All shell commands
Bash(git *) # Only git commands
Bash(git commit *) # Only git commit commands
Bash(npm run lint:*) # Pattern matching with wildcards
WebSearch # Web search capability
WebFetch # Web page fetching
mcp__<server>__<tool> # Specific MCP tool
```
### Monitoring Long Operations
```
# Periodic capture to check if Claude is still working or waiting for input
terminal(command="tmux capture-pane -t dev -p -S -10")
## Settings & Configuration
### Settings Hierarchy (highest to lowest priority)
1. **CLI flags** — override everything
2. **Local project:** `.claude/settings.local.json` (personal, gitignored)
3. **Project:** `.claude/settings.json` (shared, git-tracked)
4. **User:** `~/.claude/settings.json` (global)
### Permissions in Settings
```json
{
"permissions": {
"allow": ["Bash(npm run lint:*)", "WebSearch", "Read"],
"ask": ["Write(*.ts)", "Bash(git push*)"],
"deny": ["Read(.env)", "Bash(rm -rf *)"]
}
}
```
Look for these indicators:
- `❯` at bottom = waiting for your input (Claude is done or asking a question)
- `●` lines = Claude is actively using tools (reading, writing, running commands)
- `⏵⏵ bypass permissions on` = status bar indicator
- `◐ medium · /effort` = current effort level
### Memory Files (CLAUDE.md) Hierarchy
1. **Global:** `~/.claude/CLAUDE.md` — applies to all projects
2. **Project:** `./CLAUDE.md` — project-specific context (git-tracked)
3. **Local:** `.claude/CLAUDE.local.md` — personal project overrides (gitignored)
### Using Claude's Built-In Slash Commands (Interactive Only)
Use the `#` prefix in interactive mode to quickly add to memory: `# Always use 2-space indentation`.
## Interactive Session: Slash Commands
### Session & Context
| Command | Purpose |
|---------|---------|
| `/compact [focus]` | Summarize context to save tokens (add focus topic) |
| `/clear` | Wipe conversation history |
| `/model` | Switch models mid-session |
| `/review` | Request code review of current changes |
| `/init` | Create CLAUDE.md for the project |
| `/memory` | Edit CLAUDE.md directly |
| `/context` | Visualize context window usage |
| `/vim` | Enable vim-style editing |
| `/exit` or Ctrl+D | End session |
| `/help` | Show all commands (including custom and MCP commands) |
| `/compact [focus]` | Compress context to save tokens; CLAUDE.md survives compaction. E.g., `/compact focus on auth logic` |
| `/clear` | Wipe conversation history for a fresh start |
| `/context` | Visualize context usage as a colored grid with optimization tips |
| `/cost` | View token usage with per-model and cache-hit breakdowns |
| `/resume` | Switch to or resume a different session |
| `/rewind` | Revert to a previous checkpoint in conversation or code |
| `/btw <question>` | Ask a side question without adding to context cost |
| `/status` | Show version, connectivity, and session info |
| `/todos` | List tracked action items from the conversation |
| `/exit` or `Ctrl+D` | End session |
### Keyboard Shortcuts (Interactive Only)
### Development & Review
| Command | Purpose |
|---------|---------|
| `/review` | Request code review of current changes |
| `/security-review` | Perform security analysis of current changes |
| `/plan [description]` | Enter Plan mode with auto-start for task planning |
| `/loop [interval]` | Schedule recurring tasks within the session |
| `/batch` | Auto-create worktrees for large parallel changes (5-30 worktrees) |
### Configuration & Tools
| Command | Purpose |
|---------|---------|
| `/model [model]` | Switch models mid-session (use arrow keys to adjust effort) |
| `/effort [level]` | Set reasoning effort: `low`, `medium`, `high`, `max`, or `auto` |
| `/init` | Create a CLAUDE.md file for project memory |
| `/memory` | Open CLAUDE.md for editing |
| `/config` | Open interactive settings configuration |
| `/permissions` | View/update tool permissions |
| `/agents` | Manage specialized subagents |
| `/mcp` | Interactive UI to manage MCP servers |
| `/add-dir` | Add additional working directories (useful for monorepos) |
| `/usage` | Show plan limits and rate limit status |
| `/voice` | Enable push-to-talk voice mode (20 languages; hold Space to record, release to send) |
| `/release-notes` | Interactive picker for version release notes |
### Custom Slash Commands
Create `.claude/commands/<name>.md` (project-shared) or `~/.claude/commands/<name>.md` (personal):
```markdown
# .claude/commands/deploy.md
Run the deploy pipeline:
1. Run all tests
2. Build the Docker image
3. Push to registry
4. Update the $ARGUMENTS environment (default: staging)
```
Usage: `/deploy production` — `$ARGUMENTS` is replaced with the user's input.
### Skills (Natural Language Invocation)
Unlike slash commands (manually invoked), skills in `.claude/skills/` are markdown guides that Claude invokes automatically via natural language when the task matches:
```markdown
# .claude/skills/database-migration.md
When asked to create or modify database migrations:
1. Use Alembic for migration generation
2. Always create a rollback function
3. Test migrations against a local database copy
```
## Interactive Session: Keyboard Shortcuts
### General Controls
| Key | Action |
|-----|--------|
| `Tab` | Toggle Extended Thinking mode |
| `Shift+Tab` | Cycle permission modes |
| `Ctrl+C` | Cancel current generation |
| `Ctrl+R` | Search command history |
| `Esc Esc` | Rewind conversation or code |
| `!` prefix | Execute bash directly (e.g., `!npm test`) |
| `@` prefix | Reference files (e.g., `@./src/api/`) |
| `#` prefix | Quick add to CLAUDE.md memory |
| `Ctrl+C` | Cancel current input or generation |
| `Ctrl+D` | Exit session |
| `Ctrl+R` | Reverse search command history |
| `Ctrl+B` | Background a running task |
| `Ctrl+V` | Paste image into conversation |
| `Ctrl+O` | Transcript mode — see Claude's thinking process |
| `Ctrl+G` or `Ctrl+X Ctrl+E` | Open prompt in external editor |
| `Esc Esc` | Rewind conversation or code state / summarize |
### Mode Toggles
| Key | Action |
|-----|--------|
| `Shift+Tab` | Cycle permission modes (Normal → Auto-Accept → Plan) |
| `Alt+P` | Switch model |
| `Alt+T` | Toggle thinking mode |
| `Alt+O` | Toggle Fast Mode |
### Multiline Input
| Key | Action |
|-----|--------|
| `\` + `Enter` | Quick newline |
| `Shift+Enter` | Newline (alternative) |
| `Ctrl+J` | Newline (alternative) |
### Input Prefixes
| Prefix | Action |
|--------|--------|
| `!` | Execute bash directly, bypassing AI (e.g., `!npm test`). Use `!` alone to toggle shell mode. |
| `@` | Reference files/directories with autocomplete (e.g., `@./src/api/`) |
| `#` | Quick add to CLAUDE.md memory (e.g., `# Use 2-space indentation`) |
| `/` | Slash commands |
### Pro Tip: "ultrathink"
Use the keyword "ultrathink" in your prompt for maximum reasoning effort on a specific turn. This triggers the deepest thinking mode regardless of the current `/effort` setting.
## PR Review Pattern
@@ -304,6 +486,12 @@ terminal(command="sleep 30 && tmux capture-pane -t review -p -S -60")
terminal(command="claude -p 'Review this PR thoroughly' --from-pr 42 --max-turns 10", workdir="/path/to/repo", timeout=120)
```
### Claude Worktree with tmux
```
terminal(command="claude -w feature-x --tmux", workdir="/path/to/repo")
```
Creates an isolated git worktree at `.claude/worktrees/feature-x` AND a tmux session for it. Uses iTerm2 native panes when available; add `--tmux=classic` for traditional tmux.
## Parallel Claude Instances
Run multiple independent Claude tasks simultaneously:
@@ -312,7 +500,7 @@ Run multiple independent Claude tasks simultaneously:
# Task 1: Fix backend
terminal(command="tmux new-session -d -s task1 -x 140 -y 40 && tmux send-keys -t task1 'cd ~/project && claude -p \"Fix the auth bug in src/auth.py\" --allowedTools \"Read,Edit\" --max-turns 10' Enter")
# Task 2: Write tests
# Task 2: Write tests
terminal(command="tmux new-session -d -s task2 -x 140 -y 40 && tmux send-keys -t task2 'cd ~/project && claude -p \"Write integration tests for the API endpoints\" --allowedTools \"Read,Write,Bash\" --max-turns 15' Enter")
# Task 3: Update docs
@@ -346,11 +534,57 @@ Claude Code auto-loads `CLAUDE.md` from the project root. Use it to persist proj
- No wildcard imports
```
Global context: `~/.claude/CLAUDE.md` (applies to all projects).
**Be specific.** Instead of "Write good code", use "Use 2-space indentation for JS" or "Name test files with `.test.ts` suffix." Specific instructions save correction cycles.
### Rules Directory (Modular CLAUDE.md)
For projects with many rules, use the rules directory instead of one massive CLAUDE.md:
- **Project rules:** `.claude/rules/*.md` — team-shared, git-tracked
- **User rules:** `~/.claude/rules/*.md` — personal, global
Each `.md` file in the rules directory is loaded as additional context. This is cleaner than cramming everything into a single CLAUDE.md.
### Auto-Memory
Claude automatically stores learned project context in `~/.claude/projects/<project>/memory/`.
- **Limit:** 25KB or 200 lines per project
- This is separate from CLAUDE.md — it's Claude's own notes about the project, accumulated across sessions
## Custom Subagents
Define specialized agents in `.claude/agents/` (project), `~/.claude/agents/` (personal), or via `--agents` CLI flag (session):
### Agent Location Priority
1. `.claude/agents/` — project-level, team-shared
2. `--agents` CLI flag — session-specific, dynamic
3. `~/.claude/agents/` — user-level, personal
### Creating an Agent
```markdown
# .claude/agents/security-reviewer.md
---
name: security-reviewer
description: Security-focused code review
model: opus
tools: [Read, Bash]
---
You are a senior security engineer. Review code for:
- Injection vulnerabilities (SQL, XSS, command injection)
- Authentication/authorization flaws
- Secrets in code
- Unsafe deserialization
```
Invoke via: `@security-reviewer review the auth module`
### Dynamic Agents via CLI
```
terminal(command="claude --agents '{\"reviewer\": {\"description\": \"Reviews code\", \"prompt\": \"You are a code reviewer focused on performance\"}}' -p 'Use @reviewer to check auth.py'", timeout=120)
```
Claude can orchestrate multiple agents: "Use @db-expert to optimize queries, then @security to audit the changes."
## Hooks — Automation on Events
Configure in `.claude/settings.json` or `~/.claude/settings.json`:
Configure in `.claude/settings.json` (project) or `~/.claude/settings.json` (global):
```json
{
@@ -370,58 +604,102 @@ Configure in `.claude/settings.json` or `~/.claude/settings.json`:
}
```
**Hook types:** UserPromptSubmit, PreToolUse, PostToolUse, Notification, Stop, SubagentStop, PreCompact, SessionStart.
### All 8 Hook Types
| Hook | When it fires | Common use |
|------|--------------|------------|
| `UserPromptSubmit` | Before Claude processes a user prompt | Input validation, logging |
| `PreToolUse` | Before tool execution | Security gates, block dangerous commands (exit 2 = block) |
| `PostToolUse` | After a tool finishes | Auto-format code, run linters |
| `Notification` | On permission requests or input waits | Desktop notifications, alerts |
| `Stop` | When Claude finishes a response | Completion logging, status updates |
| `SubagentStop` | When a subagent completes | Agent orchestration |
| `PreCompact` | Before context memory is cleared | Backup session transcripts |
| `SessionStart` | When a session begins | Load dev context (e.g., `git status`) |
**Environment variables in hooks:** `CLAUDE_PROJECT_DIR`, `CLAUDE_FILE_PATHS`, `CLAUDE_TOOL_INPUT`.
### Hook Environment Variables
| Variable | Content |
|----------|---------|
| `CLAUDE_PROJECT_DIR` | Current project path |
| `CLAUDE_FILE_PATHS` | Files being modified |
| `CLAUDE_TOOL_INPUT` | Tool parameters as JSON |
## Custom Subagents
Define specialized agents in `.claude/agents/`:
```markdown
# .claude/agents/security-reviewer.md
---
name: security-reviewer
description: Security-focused code review
model: opus
tools: [Read, Bash]
---
You are a senior security engineer. Review code for:
- Injection vulnerabilities (SQL, XSS, command injection)
- Authentication/authorization flaws
- Secrets in code
- Unsafe deserialization
### Security Hook Examples
```json
{
"PreToolUse": [{
"matcher": "Bash",
"hooks": [{"type": "command", "command": "if echo \"$CLAUDE_TOOL_INPUT\" | grep -qE 'rm -rf|git push.*--force|:(){ :|:& };:'; then echo 'Dangerous command blocked!' && exit 2; fi"}]
}]
}
```
Invoke via: `@security-reviewer review the auth module`
## MCP Integration
Add external tool servers:
Add external tool servers for databases, APIs, and services:
```
terminal(command="claude mcp add github -- npx @modelcontextprotocol/server-github", timeout=30)
terminal(command="claude mcp add postgres -- npx @anthropic-ai/server-postgres --connection-string postgresql://localhost/mydb", timeout=30)
# GitHub integration
terminal(command="claude mcp add -s user github -- npx @modelcontextprotocol/server-github", timeout=30)
# PostgreSQL queries
terminal(command="claude mcp add -s local postgres -- npx @anthropic-ai/server-postgres --connection-string postgresql://localhost/mydb", timeout=30)
# Puppeteer for web testing
terminal(command="claude mcp add puppeteer -- npx @anthropic-ai/server-puppeteer", timeout=30)
```
Scopes: `-s user` (global), `-s local` (project, gitignored), `-s project` (team-shared).
### MCP Scopes
| Flag | Scope | Storage |
|------|-------|---------|
| `-s user` | Global (all projects) | `~/.claude.json` |
| `-s local` | This project (personal) | `.claude/settings.local.json` (gitignored) |
| `-s project` | This project (team-shared) | `.claude/settings.json` (git-tracked) |
## Custom Slash Commands
### MCP in Print/CI Mode
```
terminal(command="claude --bare -p 'Query database' --mcp-config mcp-servers.json --strict-mcp-config", timeout=60)
```
`--strict-mcp-config` ignores all MCP servers except those from `--mcp-config`.
Create `.claude/commands/<name>.md` for project shortcuts:
Reference MCP resources in chat: `@github:issue://123`
```markdown
# .claude/commands/deploy.md
Run the deploy pipeline:
1. Run all tests
2. Build the Docker image
3. Push to registry
4. Update the staging deployment
Environment: $ARGUMENTS (default: staging)
### MCP Limits & Tuning
- **Tool descriptions:** 2KB cap per server for tool descriptions and server instructions
- **Result size:** Default capped; use `maxResultSizeChars` annotation to allow up to **500K** characters for large outputs
- **Output tokens:** `export MAX_MCP_OUTPUT_TOKENS=50000` — cap output from MCP servers to prevent context flooding
- **Transports:** `stdio` (local process), `http` (remote), `sse` (server-sent events)
## Monitoring Interactive Sessions
### Reading the TUI Status
```
# Periodic capture to check if Claude is still working or waiting for input
terminal(command="tmux capture-pane -t dev -p -S -10")
```
Usage in interactive session: `/deploy production`
Look for these indicators:
- `❯` at bottom = waiting for your input (Claude is done or asking a question)
- `●` lines = Claude is actively using tools (reading, writing, running commands)
- `⏵⏵ bypass permissions on` = status bar showing permissions mode
- `◐ medium · /effort` = current effort level in status bar
- `ctrl+o to expand` = tool output was truncated (can be expanded interactively)
Parameterized with `$ARGUMENTS` for dynamic input.
### Context Window Health
Use `/context` in interactive mode to see a colored grid of context usage. Key thresholds:
- **< 70%** — Normal operation, full precision
- **70-85%** — Precision starts dropping, consider `/compact`
- **> 85%** — Hallucination risk spikes significantly, use `/compact` or `/clear`
## Environment Variables
| Variable | Effect |
|----------|--------|
| `ANTHROPIC_API_KEY` | API key for authentication (alternative to OAuth) |
| `CLAUDE_CODE_EFFORT_LEVEL` | Default effort: `low`, `medium`, `high`, `max`, or `auto` |
| `MAX_THINKING_TOKENS` | Cap thinking tokens (set to `0` to disable thinking entirely) |
| `MAX_MCP_OUTPUT_TOKENS` | Cap output from MCP servers (default varies; set e.g., `50000`) |
| `CLAUDE_CODE_NO_FLICKER=1` | Enable alt-screen rendering to eliminate terminal flicker |
| `CLAUDE_CODE_SUBPROCESS_ENV_SCRUB` | Strip credentials from sub-processes for security |
## Cost & Performance Tips
@@ -430,9 +708,12 @@ Parameterized with `$ARGUMENTS` for dynamic input.
3. **Use `--effort low`** for simple tasks (faster, cheaper). `high` or `max` for complex reasoning.
4. **Use `--bare`** for CI/scripting to skip plugin/hook discovery overhead.
5. **Use `--allowedTools`** to restrict to only what's needed (e.g., `Read` only for reviews).
6. **Use `/compact`** in interactive sessions when context gets large (precision drops at 70% context usage, hallucinations spike at 85%).
6. **Use `/compact`** in interactive sessions when context gets large.
7. **Pipe input** instead of having Claude read files when you just need analysis of known content.
8. **Use `--model haiku`** for simple tasks (cheaper) and `--model opus` for complex multi-step work.
9. **Use `--fallback-model haiku`** in print mode to gracefully handle model overload.
10. **Start new sessions for distinct tasks** — sessions last 5 hours; fresh context is more efficient.
11. **Use `--no-session-persistence`** in CI to avoid accumulating saved sessions on disk.
## Pitfalls & Gotchas
@@ -445,6 +726,9 @@ Parameterized with `$ARGUMENTS` for dynamic input.
7. **`--json-schema` needs enough `--max-turns`** — Claude must read files before producing structured output, which takes multiple turns.
8. **Trust dialog only appears once per directory** — first-time only, then cached.
9. **Background tmux sessions persist** — always clean up with `tmux kill-session -t <name>` when done.
10. **Slash commands (like `/commit`) only work in interactive mode** — in `-p` mode, describe the task in natural language instead.
11. **`--bare` skips OAuth** — requires `ANTHROPIC_API_KEY` env var or an `apiKeyHelper` in settings.
12. **Context degradation is real** — AI output quality measurably degrades above 70% context window usage. Monitor with `/context` and proactively `/compact`.
## Rules for Hermes Agents