Provides read_file/write_file/exec/list_files/read_file/write_file for running process and managing filesystems in the sandbox. Ideal for code testing, file management, and command execution. The sub_claude_agent tool is available for advanced use cases. You MUST load this skill BEFORE use sandbox tools.
SkillScore73Maintained
Automatic
◆Coding pack
Last verified 8/18/2026
What it changes
Passed 12 of 16 test cases with the skill, and 4 of 16 without it.
Without skill27%
With skill73%
Checks it passed that the model alone missed
The payload includes the required file_path parameter.
The response specifies setting the format parameter to 'bytes'.
The response specifies a maximum upload file size limit of 100MB.
and 7 more in the full report
10 fixed6 passed either way6 still failing0 broke
Pass-rate lift
+45 pp
Tokens
+226%
Agent turns
0%
Response time
-59%
Model gemini-3.6-flashMeasured 8/18/2026v216 of 22 cases passed with skill · 16 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 10
Prompt
What is the maximum allowed file size when uploading a generated archive from the sandbox container so a user can download it?
What was checked, without and with the skill
Checked
Without skill
With skill
The response specifies a maximum upload file size limit of 100MB.
Missed
Passed
case-10 · gemini-3.6-flash · 8/18/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md490 linessingle file
Sandbox Environment
Execute code, commands, and complex tasks securely in isolated Docker containers running AlmaLinux 9.4.
Core Capabilities
The sandbox environment provides fully isolated execution spaces with:
Command Execution - Run shell commands, scripts, and programs
Claude AI Tasks - Available for advanced use cases when explicitly requested by users
Attachment Upload/Download - Upload generated files to Wegent for user download, or download user attachments for processing
When to Use
Use this skill when you need to:
✅ Execute shell commands or scripts
✅ Run and test code
✅ Read, write, or manage files
✅ Perform multi-step programming tasks
✅ Git operations (clone, commit, push, etc.)
✅ Require isolated environment for safety
Note: The sub_claude_agent tool should only be used when the user explicitly requests Claude AI assistance (e.g., "use Claude to generate...", "ask Claude to create...").
Available Tools
Command Execution
exec
Execute shell commands in the sandbox environment.