nijaru/sg
dot_claude/skills/sg/SKILL.md
Use when searching or replacing code structures (functions, calls, blocks) across a codebase using tree-sitter patterns instead of regex.
development
Updated Apr 22, 2026
$ install --global
skillsauthnpx skillsauth add nijaru/dotfiles sgInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 22, 2026, 5:14 PM126.5s1 file scanned
SKILL.md
- name:
- sg
- description:
- Use when searching or replacing code structures (functions, calls, blocks) across a codebase using tree-sitter patterns instead of regex.
- allowed-tools:
- Bash, Read
sg (ast-grep)
Core Mandates
- Structural over Regex: Use
sgwhen you need to match code structures (functions, classes, blocks) rather than text patterns. - Syntactic Validity:
sgonly operates on syntactically valid code. Fix syntax errors before running. - Mass Edit Safety: Always use
--interactiveor verify withsg scanbefore applyingsg rewrite.
Technical Standards
1. Common Commands
| Task | Command | Purpose |
| :--- | :--- | :--- |
| Search | sg run -p 'pattern' | Search for a specific syntax pattern. |
| Scan | sg scan | Find patterns based on project-wide YAML rules. |
| Rewrite | sg run -p 'pattern' -r 'replacement' | Structural search and replace. |
| Help | sg help | View full CLI options. |
2. Pattern Matching
- Use
$$$for matching multiple nodes (like function arguments). - Use
$followed by a name (e.g.,$FUNC) to capture specific nodes. - Filter by language:
sg run -l python -p '...'.
3. Workflow
- Identify the structure you want to change.
- Draft the pattern using
sg run. - Verify matches with
sg scan. - Apply changes surgically.
Anti-Rationalization
| Excuse | Reality |
| :--- | :--- |
| "Grep is faster" | Grep is faster to type but slower and riskier for complex code changes. |
| "I'll use regex" | Regex doesn't understand syntax blocks. sg does. |
| "Pattern is simple" | Simple patterns often have hidden edge cases that sg handles natively. |
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