system-prompt-engineer
Author and review system prompts for agent behavior control, instruction precedence, safety constraints, and output contracts.
Skill by lvcoi
Chalk Labs
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Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/lvcoi-system-prompt-engineer
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: agent-building
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/system-prompt-engineer
What's inside
- Skill name
system-prompt-engineer- Description
- Author and review system prompts for agent behavior control, instruction precedence, safety constraints, and output contracts. Use when defining or auditing operational prompts for reliability.
- License
- MIT
- Instructions
- 23 lines in SKILL.md · view on GitHub
Files (2)
- SKILL.md
- prompt-audit.md · references/
SKILL.md (first lines)
# System Prompt Engineer Build high-clarity prompts that reduce ambiguity and enforce policy. ## Authoring Flow 1. Declare role and domain context. 2. List non-negotiable constraints and precedence. 3. Specify tool usage and prohibited actions. 4. Define required output format and evidence rules. 5. Add fallback behavior for unknowns and blocked operations. ## Validation - Test prompt against at least three realistic scenarios. - Verify precedence handling under conflicting instructions. - Confirm output is structurally consistent. ## References Load `references/prompt-audit.md` to perform prompt quality review.
From lvcoi/solidJSkills, MIT.
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Signals
- Stars
- 9
- Forks
- 4
- Open issues
- 0
- Last commit (this folder)
- Feb 13, 2026 (8 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- Repository
- github.com/lvcoi/solidJSkills
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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Cite this page
system-prompt-engineer skill. Agent Mart. https://agentmart.dev/skills/lvcoi-system-prompt-engineer (last updated 2026-10-24)