Exec-Truncate is an intelligent output management tool that compresses verbose shell command results while preserving critical context for AI agents.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install openclaw-exec-truncate
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 openclaw-exec-truncate 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 Exec-Truncate?
Exec-Truncate is a specialized utility designed to solve the common problem of context window saturation in AI agents. By providing domain-aware output truncation, it intelligently filters shell command results from tools like git, grep, and build systems. Unlike simple character-based clipping, this skill understands the structure of the data it processes, ensuring that the most relevant information remains intact while discarding noise.
As a versatile component of the Openclaw Skills ecosystem, it allows developers to wrap standard execution functions with a filtered layer. This ensures that agents receive concise, high-value data, leading to faster processing times and reduced token costs. It operates as a standalone utility, making it easy to integrate into custom workflows where managing large volumes of command-line data is a priority.
Exec-Truncate Use Cases
- Reducing token consumption when AI agents perform deep git history or diff analysis.
- Cleaning up verbose build logs to show only relevant error messages and warnings to the agent.
- Managing massive search results from grep or find commands by capping matches and stripping redundant path prefixes.
- Abbreviating directory listings (ls -la) to focus on file names and sizes without overwhelming the context window.
How Exec-Truncate Works
- The user or agent initiates a shell command through a wrapper or the filtered executor.
- The raw output is captured from the shell (stdout).
- The FilterRegistry matches the executed command against known patterns (e.g., git diff, npm run, grep).
- The corresponding domain-aware function processes the string, applying specific logic like keeping only the '+' lines in diffs or short hashes in logs.
- A fail-safe mechanism ensures that if processing fails, the original output is returned to prevent data loss.
- The compressed, context-rich result is returned to the AI agent or application.
Exec-Truncate Setup
To install the Exec-Truncate skill into your local environment, clone the repository or copy the module to your Openclaw Skills directory:
# Navigate to your skills directory
cd ~/.openclaw/workspace/skills/
# Clone the exec-truncate repository
git clone https://github.com/openclaw/exec-truncate.git
# Install dependencies (Deno environment)
deno cache mod.ts
Exec-Truncate Data Schema & Taxonomy
The skill is organized into modular TypeScript files to allow for easy extension and specific imports. Below is the primary module taxonomy:
| Module | Purpose |
|---|---|
| mod.ts | Contains core truncation functions for git, grep, ls, and build tools. |
| filter-registry.ts | Manages the mapping between shell command patterns and specific filters. |
| filtered-executor.ts | Provides the high-level wrapper to automate truncation during execution. |
| index.ts | The primary entry point for the Openclaw Skills integration. |
Exec-Truncate Advanced Features
- Custom Filter Registration: Developers can use FilterRegistry to define regex-based patterns for proprietary internal tools.
- FilteredExecutor Factory: A higher-order function that wraps any async execution function with automatic truncation logic.
- Fail-Safe Wrapper: Uses truncateWithFailSafe to ensure that regex crashes or memory limits never break the agent's execution flow.
- Multi-Language Support: Includes a Python reimplementation and a shell wrapper for environments where TypeScript is not the primary runtime.
SKILL.md
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