How do I install the Pre Execute Check skill?

Run npx skillmds@latest add concertonotes/pre-execute-check in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Pre Execute Check safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Pre Execute Check?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Pre Execute Check free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Pre Execute Check?

ConcertoNotes (@concertonotes) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Pre Execute Check by concertonotes — Agent Skill

Name: Pre Execute Check
Rating: 4.5 (4 reviews)
Author: ConcertoNotes

Pre Execute Check

Check AxonFlow governance policy before executing commands, writing files, or modifying any state. Also scan file content for PII before writing. Use before any tool call that creates, modifies, or deletes data.

ConcertoNotes Updated Sep 8, 2026 0 repo stars

File contents

Before using tools that modify state (terminal commands, file writes, file edits, MCP operations):

Step 1: Check policy

Call the check_policy MCP tool with:

connector_type: codex.Bash (for commands), codex.Write (for file writes), or the appropriate tool type
statement: the command or content to check
operation: execute

If the response shows allowed: false, do NOT proceed. Report the block reason to the user.

Step 2: For file writes — also scan content for PII

If you are writing a file and the content might contain sensitive data (names, SSNs, credit cards, emails, phone numbers, addresses, medical records, financial data), call the check_output MCP tool with:

connector_type: codex.Write
message: the content being written

If a redacted_message is returned, write the redacted version instead. If allowed: false, do not write the file.

These checks take 2-5ms and protect against dangerous commands, SQL injection, credential access, SSRF, path traversal, and PII exposure.

Frequently asked questions