System Prompt Curator
- Updated May 30, 2026
- agent-sh/system-prompt-curator
System Prompt Curator is a Claude Code plugin that writes and refines production-grade system prompts so autonomous coding agents can follow clear identity, workflow, and completion rules.
About
System Prompt Curator is an AgentSys marketplace plugin that provides canonical guidance for creating and refining production-grade autonomous agent system prompts. It generates new prompts from role descriptions, improves existing prompts by detecting anti-patterns, and supplies templates for common agent roles across Claude Code, Cursor, Codex, and similar tools. Reach for it when you need dependable agent identity, phased workflow, and evidence-based completion criteria instead of ad hoc prompt drafts.
- Generates prompts from role descriptions or improves existing files
- Enforces ten core principles from top-performing coding agents
- Templates for issue-to-PR, research, review, and orchestration roles
- Recommends harness-level checks that belong in code not prompts
System Prompt Curator by the numbers
- Data as of Jul 10, 2026 (Skillselion catalog sync)
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| Last updated | May 30, 2026 |
|---|---|
| Repository | agent-sh/system-prompt-curator ↗ |
How do I write or fix an autonomous agent system prompt that will behave reliably across real coding tasks?
Create or refine production-grade system prompts for autonomous coding agents and multi-agent orchestration with research-backed patterns.
Who is it for?
Engineers building or orchestrating autonomous coding agents who want research-backed prompt structure and anti-pattern detection.
Skip if: Developers who only need application feature code or SKILL.md authoring without system-prompt design.
What you get
A refined system prompt with phased workflow, explicit tools, evidence-based completion criteria, and separated harness recommendations.
Plugins in this marketplace
1 plugin - install individually after you add the marketplace.
Recommended Marketplaces
FAQ
Can it improve an existing prompt file?
Yes. Use /System Prompt Curator --improve path/to/prompt.md with optional --for-orchestrator or --minimal flags.
What principles does it enforce?
It applies ten core principles drawn from agents like SWE-agent, OpenHands, Claude Code, and Cursor, including clear identity and evidence-based completion.
How is it related to skill-curator?
skill-curator is the sibling plugin for SKILL.md files; System Prompt Curator focuses on autonomous agent system prompts.