A hardened shell execution environment that runs commands within a dedicated, persistent tmux session to ensure safe and isolated terminal interactions.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install claw-shell-hardened
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install claw-shell-hardened using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Claw Shell Hardened?
Claw Shell Hardened is a specialized utility designed for AI agents to interact with system shells through a controlled and persistent tmux environment. By isolating all operations within a single session named claw, it provides a stable workspace where command history and process states are maintained across multiple agent turns.
This skill is a critical component of the Openclaw Skills ecosystem, prioritizing system integrity through a robust security layer. It prevents accidental system damage by enforcing strict guardrails around destructive commands while providing the AI agent with a transparent interface to execute development tasks, system audits, and repository management.
Claw Shell Hardened Use Cases
- Managing long-running terminal processes that need to persist between agent interactions.
- Executing repository-level commands like git status or ls -la within a predictable environment.
- Performing safe system inspections without the risk of accidentally affecting other active terminal sessions.
- Implementing a secure buffer for shell execution where destructive commands require explicit human-in-the-loop confirmation.
How Claw Shell Hardened Works
- The AI agent initiates a command through the claw_shell_run tool.
- The skill checks for an existing tmux session named claw and creates it in the background if it is not found.
- The specified command is injected into the session followed by a carriage return to trigger execution.
- The skill captures the visible output from the active tmux pane.
- The captured text is cleaned and returned to the agent as a structured response for further processing.
Claw Shell Hardened Setup
To integrate this capability into your environment, ensure tmux is installed on your host system and add the skill to your agent configuration:
# Ensure tmux is installed
sudo apt-get install tmux
# The skill will automatically handle session creation
# for the 'claw' environment upon first execution.
Claw Shell Hardened Data Schema & Taxonomy
Claw Shell Hardened utilizes a streamlined data flow focused on session isolation and output capture:
| Component | Type | Description |
|---|---|---|
| Session Name | String | Hardcoded to claw to prevent cross-session interference. |
| Input Payload | String | The raw shell command to be executed. |
| Output Capture | Text Block | The terminal output read directly from the tmux pane buffer. |
| Guardrail Log | Metadata | Records instances where restricted commands (sudo, rm) triggered user prompts. |
Claw Shell Hardened Advanced Features
- Persistent session state allowing agents to resume work in the same terminal context across different sessions.
- Integrated Faberlens security guardrails that analyze command intent rather than just syntax.
- Protection against data exfiltration by blocking commands that attempt to pipe local secrets to external network endpoints.
- Intelligent handling of environment variables, allowing access to non-sensitive paths while blocking credential dumps.
SKILL.md
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