permission-analyzer

name	permission-analyzer
description	Generate Claude Code permissions config from session history. Use when setting up autonomous mode, configuring .claude/settings.json, avoiding --dangerously-skip-permissions, or analyzing what permissions a project needs. Reads session logs to extract Bash commands and MCP tools actually used, then generates appropriate allow/deny rules.

Permission Analyzer

Generate permissions configuration based on actual tool usage from past sessions.

Workflow

1. Run the analysis script for the current project:

   ~/.claude/skills/permission-analyzer/scripts/analyze_permissions.py
   

2. Review the generated permissions output

3. Offer to merge into existing settings:

   • If .claude/settings.json exists, merge the permissions section
   • If not, create new file with generated config
   • Preserve existing settings (model, env, etc.)

Script Output

The script outputs to stderr (summary) and stdout (JSON):

Analyzing: /path/to/project
Sessions analyzed: 42

Bash commands found:
  git: 150
  make: 80
  go: 45

MCP tools found:
  mcp__devtools__think

{
  "permissions": {
    "allow": ["Bash(git:*)", "Bash(go:*)", ...],
    "deny": [...],
    "defaultMode": "acceptEdits"
  }
}

Generated Rules

Allow list includes:

• Development commands used (git, make, go, npm, cargo, etc.)
• Filesystem commands used (ls, mkdir, find, etc.)
• MCP server wildcards for servers that were used

Deny list includes:

• Dangerous gh operations (merge, delete, secrets, auth)
• Sensitive file patterns (.env, secrets/, *.pem, *.key)
• Destructive commands (rm -rf, sudo, chmod 777)

Merging Settings

When .claude/settings.json exists, merge only the permissions key while preserving other settings. If user has custom allow/deny rules, ask whether to merge or replace.