// 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.
[HINT] 下载包含 SKILL.md 和所有相关文件的完整技能目录
| 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 | 2.2.0 |
| author | Hermes Agent + Teknium |
| license | MIT |
| metadata | {"hermes":{"tags":["Coding-Agent","Claude","Anthropic","Code-Review","Refactoring","PTY","Automation"],"related_skills":["codex","hermes-agent","opencode"]}} |
Delegate coding tasks to Claude Code (Anthropic's autonomous coding agent CLI) via the Hermes terminal. Claude Code v2.x can read files, write code, run shell commands, spawn subagents, and manage git workflows autonomously.
npm install -g @anthropic-ai/claude-codeclaude once to log in (browser OAuth for Pro/Max, or set ANTHROPIC_API_KEY)claude auth login --console for API key billingclaude auth login --sso for Enterpriseclaude auth status (JSON) or claude auth status --text (human-readable)claude doctor — checks auto-updater and installation healthclaude --version (requires v2.x+)claude update or claude upgradeHermes interacts with Claude Code in two fundamentally different ways. Choose based on the task.
-p) — Non-Interactive (PREFERRED for most tasks)Print mode runs a one-shot task, returns the result, and exits. No PTY needed. No interactive prompts. This is the cleanest integration path.
terminal(command="claude -p 'Add error handling to all API calls in src/' --allowedTools 'Read,Edit' --max-turns 10", workdir="/path/to/project", timeout=120)
When to use print mode:
--json-schemacat file | claude -p "analyze this")Print mode skips ALL interactive dialogs — no workspace trust prompt, no permission confirmations. This makes it ideal for automation.
Interactive mode gives you a full conversational REPL where you can send follow-up prompts, use slash commands, and watch Claude work in real time. Requires tmux orchestration.
# Start a tmux session
terminal(command="tmux new-session -d -s claude-work -x 140 -y 40")
# Launch Claude Code inside it
terminal(command="tmux send-keys -t claude-work 'cd /path/to/project && claude' Enter")
# Wait for startup, then send your task
# (after ~3-5 seconds for the welcome screen)
terminal(command="sleep 5 && tmux send-keys -t claude-work 'Refactor the auth module to use JWT tokens' Enter")
# Monitor progress by capturing the pane
terminal(command="sleep 15 && tmux capture-pane -t claude-work -p -S -50")
# Send follow-up tasks
terminal(command="tmux send-keys -t claude-work 'Now add unit tests for the new JWT code' Enter")
# Exit when done
terminal(command="tmux send-keys -t claude-work '/exit' Enter")
When to use interactive mode:
/compact, /review, /model)Claude Code presents up to two confirmation dialogs on first launch. You MUST handle these via tmux send-keys:
❯ 1. Yes, I trust this folder ← DEFAULT (just press Enter)
2. No, exit
Handling: tmux send-keys -t <session> Enter — default selection is correct.
❯ 1. No, exit ← DEFAULT (WRONG choice!)
2. Yes, I accept
Handling: Must navigate DOWN first, then Enter:
tmux send-keys -t <session> Down && sleep 0.3 && tmux send-keys -t <session> Enter
# Launch with permissions bypass
terminal(command="tmux send-keys -t claude-work 'claude --dangerously-skip-permissions \"your task\"' Enter")
# Handle trust dialog (Enter for default "Yes")
terminal(command="sleep 4 && tmux send-keys -t claude-work Enter")
# Handle permissions dialog (Down then Enter for "Yes, I accept")
terminal(command="sleep 3 && tmux send-keys -t claude-work Down && sleep 0.3 && tmux send-keys -t claude-work Enter")
# Now wait for Claude to work
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.
| 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 |
terminal(command="claude -p 'Analyze auth.py for security issues' --output-format json --max-turns 5", workdir="/project", timeout=120)
Returns a JSON object with:
{
"type": "result",
"subtype": "success",
"result": "The analysis text...",
"session_id": "75e2167f-...",
"num_turns": 3,
"total_cost_usd": 0.0787,
"duration_ms": 10276,
"stop_reason": "end_turn",
"terminal_reason": "completed",
"usage": { "input_tokens": 5, "output_tokens": 603, ... },
"modelUsage": { "claude-sonnet-4-6": { "costUSD": 0.078, "contextWindow": 200000 } }
}
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).
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).
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.
# Pipe a file for analysis
terminal(command="cat src/auth.py | claude -p 'Review this code for bugs' --max-turns 1", timeout=60)
# Pipe multiple files
terminal(command="cat src/*.py | claude -p 'Find all TODO comments' --max-turns 1", timeout=60)
# Pipe command output
terminal(command="git diff HEAD~3 | claude -p 'Summarize these changes' --max-turns 1", timeout=60)
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. Claude validates output against the schema before returning.
# Start a task
terminal(command="claude -p 'Start refactoring the database layer' --output-format json --max-turns 10 > /tmp/session.json", workdir="/project", timeout=180)
# Resume with session ID
terminal(command="claude -p 'Continue and add connection pooling' --resume $(cat /tmp/session.json | python3 -c 'import json,sys; print(json.load(sys.stdin)[\"session_id\"])') --max-turns 5", workdir="/project", timeout=120)
# 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)
terminal(command="claude --bare -p 'Run all tests and report failures' --allowedTools 'Read,Bash' --max-turns 10", workdir="/project", timeout=180)
--bare skips hooks, plugins, MCP discovery, and CLAUDE.md loading. Fastest startup. Requires ANTHROPIC_API_KEY (skips OAuth).
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>' |
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).
| Flag | Effect |
|---|---|
-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) |
| 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 |
--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) |
| 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 (comma or space-separated) |
--disallowedTools <tools...> | Blacklist specific tools |
--tools <tools...> | Override built-in tool set ("" = none, "default" = all, or tool names) |
| Flag | Effect |
|---|---|
--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 |
--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) |
| 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 |
| 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) |
| Flag | Effect |
|---|---|
--teammate-mode <mode> | How agent teams display: auto, in-process, or tmux |
--brief | Enable SendUserMessage tool for agent-to-user communication |
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
.claude/settings.local.json (personal, gitignored).claude/settings.json (shared, git-tracked)~/.claude/settings.json (global){
"permissions": {
"allow": ["Bash(npm run lint:*)", "WebSearch", "Read"],
"ask": ["Write(*.ts)", "Bash(git push*)"],
"deny": ["Read(.env)", "Bash(rm -rf *)"]
}
}
~/.claude/CLAUDE.md — applies to all projects./CLAUDE.md — project-specific context (git-tracked).claude/CLAUDE.local.md — personal project overrides (gitignored)Use the # prefix in interactive mode to quickly add to memory: # Always use 2-space indentation.
| Command | Purpose |
|---|---|
/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 |
| 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) |
| 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 |
Create .claude/commands/<name>.md (project-shared) or ~/.claude/commands/<name>.md (personal):
# .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.
Unlike slash commands (manually invoked), skills in .claude/skills/ are markdown guides that Claude invokes automatically via natural language when the task matches:
# .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
| Key | Action |
|---|---|
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 |
| 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 |
| Key | Action |
|---|---|
\ + Enter | Quick newline |
Shift+Enter | Newline (alternative) |
Ctrl+J | Newline (alternative) |
| 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 |
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.
terminal(command="cd /path/to/repo && git diff main...feature-branch | claude -p 'Review this diff for bugs, security issues, and style problems. Be thorough.' --max-turns 1", timeout=60)
terminal(command="tmux new-session -d -s review -x 140 -y 40")
terminal(command="tmux send-keys -t review 'cd /path/to/repo && claude -w pr-review' Enter")
terminal(command="sleep 5 && tmux send-keys -t review Enter") # Trust dialog
terminal(command="sleep 2 && tmux send-keys -t review 'Review all changes vs main. Check for bugs, security issues, race conditions, and missing tests.' Enter")
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)
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.
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
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
terminal(command="tmux new-session -d -s task3 -x 140 -y 40 && tmux send-keys -t task3 'cd ~/project && claude -p \"Update README.md with the new API endpoints\" --allowedTools \"Read,Edit\" --max-turns 5' Enter")
# Monitor all
terminal(command="sleep 30 && for s in task1 task2 task3; do echo '=== '$s' ==='; tmux capture-pane -t $s -p -S -5 2>/dev/null; done")
Claude Code auto-loads CLAUDE.md from the project root. Use it to persist project context:
# Project: My API
## Architecture
- FastAPI backend with SQLAlchemy ORM
- PostgreSQL database, Redis cache
- pytest for testing with 90% coverage target
## Key Commands
- `make test` — run full test suite
- `make lint` — ruff + mypy
- `make dev` — start dev server on :8000
## Code Standards
- Type hints on all public functions
- Docstrings in Google style
- 2-space indentation for YAML, 4-space for Python
- No wildcard imports
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.
For projects with many rules, use the rules directory instead of one massive CLAUDE.md:
.claude/rules/*.md — team-shared, git-tracked~/.claude/rules/*.md — personal, globalEach .md file in the rules directory is loaded as additional context. This is cleaner than cramming everything into a single CLAUDE.md.
Claude automatically stores learned project context in ~/.claude/projects/<project>/memory/.
Define specialized agents in .claude/agents/ (project), ~/.claude/agents/ (personal), or via --agents CLI flag (session):
.claude/agents/ — project-level, team-shared--agents CLI flag — session-specific, dynamic~/.claude/agents/ — user-level, personal# .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
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."
Configure in .claude/settings.json (project) or ~/.claude/settings.json (global):
{
"hooks": {
"PostToolUse": [{
"matcher": "Write(*.py)",
"hooks": [{"type": "command", "command": "ruff check --fix $CLAUDE_FILE_PATHS"}]
}],
"PreToolUse": [{
"matcher": "Bash",
"hooks": [{"type": "command", "command": "if echo \"$CLAUDE_TOOL_INPUT\" | grep -q 'rm -rf'; then echo 'Blocked!' && exit 2; fi"}]
}],
"Stop": [{
"hooks": [{"type": "command", "command": "echo 'Claude finished a response' >> /tmp/claude-activity.log"}]
}]
}
}
| 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) |
| Variable | Content |
|---|---|
CLAUDE_PROJECT_DIR | Current project path |
CLAUDE_FILE_PATHS | Files being modified |
CLAUDE_TOOL_INPUT | Tool parameters as 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"}]
}]
}
Add external tool servers for databases, APIs, and services:
# 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)
| 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) |
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.
Reference MCP resources in chat: @github:issue://123
maxResultSizeChars annotation to allow up to 500K characters for large outputsexport MAX_MCP_OUTPUT_TOKENS=50000 — cap output from MCP servers to prevent context floodingstdio (local process), http (remote), sse (server-sent events)# Periodic capture to check if Claude is still working or waiting for input
terminal(command="tmux capture-pane -t dev -p -S -10")
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 barctrl+o to expand = tool output was truncated (can be expanded interactively)Use /context in interactive mode to see a colored grid of context usage. Key thresholds:
/compact/compact or /clear| 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 |
--max-turns in print mode to prevent runaway loops. Start with 5-10 for most tasks.--max-budget-usd for cost caps. Note: minimum ~$0.05 for system prompt cache creation.--effort low for simple tasks (faster, cheaper). high or max for complex reasoning.--bare for CI/scripting to skip plugin/hook discovery overhead.--allowedTools to restrict to only what's needed (e.g., Read only for reviews)./compact in interactive sessions when context gets large.--model haiku for simple tasks (cheaper) and --model opus for complex multi-step work.--fallback-model haiku in print mode to gracefully handle model overload.--no-session-persistence in CI to avoid accumulating saved sessions on disk.pty=true alone in Hermes terminal works but tmux gives you capture-pane for monitoring and send-keys for input, which is essential for orchestration.--dangerously-skip-permissions dialog defaults to "No, exit" — you must send Down then Enter to accept. Print mode (-p) skips this entirely.--max-budget-usd minimum is ~$0.05 — system prompt cache creation alone costs this much. Setting lower will error immediately.--max-turns is print-mode only — ignored in interactive sessions.python instead of python3 — on systems without a python symlink, Claude's bash commands will fail on first try but it self-corrects.--continue finds the most recent session for the current working directory.--json-schema needs enough --max-turns — Claude must read files before producing structured output, which takes multiple turns.tmux kill-session -t <name> when done./commit) only work in interactive mode — in -p mode, describe the task in natural language instead.--bare skips OAuth — requires ANTHROPIC_API_KEY env var or an apiKeyHelper in settings./context and proactively /compact.-p) for single tasks — cleaner, no dialog handling, structured outputworkdir — keep Claude focused on the right project directory--max-turns in print mode — prevents infinite loops and runaway coststmux capture-pane -t <session> -p -S -50 to check progress❯ prompt — indicates Claude is waiting for input (done or asking a question)--allowedTools — restrict capabilities to what the task actually needs