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semgrep-rule-creator
Creates custom Semgrep rules for detecting security vulnerabilities, bug patterns, and code patterns. Use when writing Semgrep rules or building custom static analysis detections.
- License
- CC-BY-SA-4.0
- SKILL.md tokens
- 1,823
- Bundled files
- 4
- Bundled tokens (estimated)
- 4,176
Cost per 1,000 loads
Estimated input cost per 1,000 loads of SKILL.md only (characters ÷ 4). Bundled files, output tokens and execution are excluded.
| Model | Input / 1M tokens | 1,000 loads |
|---|---|---|
| Claude Opus 5 | $5.00 | $9.12 |
| Claude Sonnet 5 | $2.00 | $3.65 |
| Claude Haiku 4.5 | $1.00 | $1.82 |
Safety flags
Detected automatically from files; not a security audit.
- Runs scripts
- No
- Network access
- Yes
- Shell commands
- No
Works with
Open SKILL.md format
- Claude Code
- Codex
- Cursor
- GitHub Copilot
- Gemini CLI
- OpenCode
- Goose
Install
npx skills add trailofbits/skills --skill semgrep-rule-creatorLast verified:
semgrep-rule-creator FAQ
What does the semgrep-rule-creator skill do?
Creates custom Semgrep rules for detecting security vulnerabilities, bug patterns, and code patterns. Use when writing Semgrep rules or building custom static analysis detections. Source: https://github.com/trailofbits/skills/blob/main/plugins/semgrep-rule-creator/skills/semgrep-rule-creator/SKILL.md
What does the semgrep-rule-creator skill cost to load?
SKILL.md is about 1,823 tokens. Estimated input cost per 1,000 loads: Claude Opus 5 $9.12; Claude Sonnet 5 $3.65; Claude Haiku 4.5 $1.82. Estimated input cost per 1,000 loads of SKILL.md only (characters ÷ 4). Bundled files, output tokens and execution are excluded. Prices: https://docs.anthropic.com/en/docs/about-claude/pricing
How do I install the semgrep-rule-creator skill?
Skills CLI: npx skills add trailofbits/skills --skill semgrep-rule-creator. Claude Code: /plugin marketplace add trailofbits/skills, then install the plugin from that marketplace. Download the semgrep-rule-creator skill folder as a ZIP and upload it in Claude.ai skills settings.
Is the semgrep-rule-creator skill safe?
Automatically detected flags: network access. Flags are detected automatically from the skill's files and are not a security audit; review the SKILL.md before installing.