Claude Code Skill

Persistent multi-engine coding session manager. Wraps Claude Code, Codex, Gemini, and Cursor CLIs into headless agentic engines with 27 tools.

Engine Quick Reference

Engine	CLI	Session Type	Best For
claude	claude	Persistent subprocess	Multi-turn, complex tasks
codex	codex exec	Per-message spawn	One-shot execution
gemini	gemini -p	Per-message spawn	One-shot execution
cursor	agent -p	Per-message spawn	One-shot execution

Core Workflow

// 1. Start session (any engine)
claude_session_start({ name: "myproject", cwd: "/path/to/project", engine: "claude" })
claude_session_start({ name: "codex-task", cwd: "/path/to/project", engine: "codex" })
claude_session_start({ name: "gemini-task", cwd: "/path/to/project", engine: "gemini" })
claude_session_start({ name: "cursor-task", cwd: "/path/to/project", engine: "cursor" })

// 2. Send messages
claude_session_send({ name: "myproject", message: "Fix the auth bug" })

// 3. Check status / search history
claude_session_status({ name: "myproject" })
claude_session_grep({ name: "myproject", pattern: "error" })

// 4. Stop when done
claude_session_stop({ name: "myproject" })

Session Options

Parameter	Description
engine	claude (default), codex, gemini, cursor
model	Model name or alias (opus, sonnet, haiku, gpt-5.4, gemini-pro, composer-2)
permissionMode	acceptEdits, auto, plan, bypassPermissions, default
effort	low, medium, high, xhigh, max, auto (xhigh is Opus 4.7-only, between high and max)
maxBudgetUsd	Cost limit in USD
allowedTools	List of allowed tool names

CLI 2.1.111 options

Parameter	Description
bare	Minimal mode — no CLAUDE.md, hooks, LSP, auto-memory. Auto-enables prompt cache optimizations (see below).
includeHookEvents	Stream hook lifecycle events (PreToolUse/PostToolUse).
permissionPromptTool	Delegate permission prompts to an MCP tool for non-interactive use.
excludeDynamicSystemPromptSections	Move cwd/env/git from system prompt to user message for better prompt cache hits. Auto-enabled with bare: true.
enablePromptCaching1H	Enable 1-hour prompt cache TTL (vs default 5-min). Auto-enabled with bare: true.
debug / debugFile	Targeted debug output by category (e.g. "api,mcp") and optional file path.
fromPr	Resume a session linked to a GitHub PR number or URL.
channels / dangerouslyLoadDevelopmentChannels	MCP channel subscriptions (research preview).

CLI 2.1.121 options

Parameter	Description
forkSubagent	Fork subagent for non-interactive sessions (sets CLAUDE_CODE_FORK_SUBAGENT=1).
enableToolSearch	Enable Vertex AI tool search (sets ENABLE_TOOL_SEARCH=1).
otelLogUserPrompts	OpenTelemetry: include user prompts in logs (sets OTEL_LOG_USER_PROMPTS=1).
otelLogRawApiBodies	OpenTelemetry: include raw API bodies in logs (sets OTEL_LOG_RAW_API_BODIES=1). Debug only.

stats.pluginErrors is now populated from the system/init event when CLI plugins fail to load due to unmet dependencies.

TRACEPARENT / TRACESTATE (W3C distributed tracing) are automatically forwarded from parent process env — set them before starting the session and they propagate to the child Claude CLI.

Smart defaults: When bare: true, the plugin auto-enables --exclude-dynamic-system-prompt-sections and ENABLE_PROMPT_CACHING_1H=1 unless explicitly set to false.

Multi-Agent Council

Parallel agent collaboration with git worktree isolation and consensus voting. Agents can use different engines.

// Start a council
council_start({
  task: 'Build a REST API',
  agents: [
    { name: 'Architect', emoji: '🏗️', persona: 'System design', engine: 'claude' },
    { name: 'Engineer', emoji: '⚙️', persona: 'Implementation', engine: 'codex' },
  ],
  maxRounds: 5,
  projectDir: '/path/to/project',
});

Council lifecycle: council_start → poll council_status → council_review → council_accept or council_reject.

For details: see references/council.md

Cross-Session Messaging

Sessions can communicate. Idle sessions receive immediately; busy sessions queue.

claude_session_send_to({ from: "sender", to: "receiver", message: "Auth module needs rate limiting" })
claude_session_send_to({ from: "monitor", to: "*", message: "Build failed!" })  // broadcast
claude_session_inbox({ name: "receiver" })
claude_session_deliver_inbox({ name: "receiver" })

Team Tools (All Engines)

• Claude: native /team and @teammate commands
• Codex/Gemini/Cursor: virtual teams via cross-session inbox routing

claude_team_list({ name: "myproject" })
claude_team_send({ name: "myproject", teammate: "teammate", message: "Review this" })

Ultraplan & Ultrareview

• Ultraplan: Opus deep planning session (up to 30 min), produces detailed implementation plan
• Ultrareview: Fleet of 5-20 bug-hunting agents reviewing in parallel (security, logic, perf, types, etc.)

Both are async — start then poll status.

27 Tools Overview

Category	Tools
Session Lifecycle	claude_session_start, claude_session_send, claude_session_stop, claude_session_list, claude_sessions_overview
Session Ops	claude_session_status, claude_session_grep, claude_session_compact, claude_session_update_tools, claude_session_switch_model
Inbox	claude_session_send_to, claude_session_inbox, claude_session_deliver_inbox
Teams	claude_agents_list, claude_team_list, claude_team_send
Council	council_start, council_status, council_abort, council_inject, council_review, council_accept, council_reject
Ultra	ultraplan_start, ultraplan_status, ultrareview_start, ultrareview_status

For full parameter reference: see references/tools.md

Authentication Prerequisites

Each engine requires its own auth before use:

• Claude: claude /login or ANTHROPIC_API_KEY
• Codex: codex login or OPENAI_API_KEY
• Gemini: gemini login or GEMINI_API_KEY
• Cursor: agent login or CURSOR_API_KEY