ARC Labs
Free tool
Prompt Reviewer
A second set of eyes on your system prompts.
Paste a prompt and get structured feedback on clarity, injection surface, ambiguity, and failure modes. The review a senior engineer would give, minus the wait. Static, reproducible, no model call.
Prompt review · system prompt
- Clarity78 / 100
- Ambiguity4 phrases
- Injection surfaceElevated
- Failure modes named9
- Rewrite readyYes
What it does
- Clarity, structure, and ambiguity scoring
- Prompt-injection surface analysis (OWASP LLM01-aligned)
- Failure-mode enumeration with covered / gap status
- Concrete rewrite suggestions + Markdown / JSON export
How it works
- 1Paste the system prompt (and optional tool list).
- 2We score clarity, structure, ambiguity, and injection surface against a fixed rubric.
- 3You get concrete rewrites and a failure-mode list to put in the PR.
- 4Gate in CI with the CLI --min-grade flag when you’re ready.
Who it’s for
Builders writing system prompts for agents and copilots who want failure modes named before users find them.
What’s next
- Static review engine + UI + CLI — shipped
- Rewrite suggestions + Markdown export — shipped
- Shareable report links
- Live attack-battery mode
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