Agentic Agent Prompt Builder — AI skill for Claude Code
A free, single-file builder for well-structured AI agent prompts.
How to install Agentic Agent Prompt Builder
This entry records only its repository, not the path inside it, so there is no
exact command to give. Open Mfrostbutter/Agentic-Agent-Prompt-Builder and copy the folder into
~/.claude/skills/, or the file into ~/.claude/agents/.
What Agentic Agent Prompt Builder does
A free, single-file builder for well-structured AI agent prompts. Pick a starting preset, fill in the parts you need, and copy a clean, organized prompt. Everything runs in your browser; nothing is se
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README
Agent Prompt Builder
A free, single-file builder for well-structured AI agent prompts. Pick a starting preset, fill in the parts you need, and copy a clean, organized prompt. Everything runs in your browser; nothing is sent anywhere.
It's meant for people who are new to writing agent prompts and want a solid structure to start from instead of a blank page.
Use it
Open `index.html` in any browser. That's the whole app, one file, no build step and no dependencies.
To host it for free, enable GitHub Pages on this repo (Settings → Pages → deploy from the `main` branch) and it serves at `https://.github.io/Agentic-Agent-Prompt-Builder/`.
What it does
- Two modes. Standalone agent for a normal assistant, or Tool sub-agent for an agent invoked by an orchestrator.
- Presets. Research, summarizer, social media copywriter, SEO writer, cold outreach, coding assistant, code reviewer, data extraction, SQL analyst, and customer support. Each one is a worked example of a good prompt.
- Structured sections. Identity, objective, tools, workflow, rules (always / never), output format, examples, and error handling.
- Modern output. Generates a markdown-structured prompt with clear headers and
blocks, the shape current models follow best. - Live preview, copy, and download. The prompt updates as you type. Copy to clipboard or download as
.md. - Autosave. Your work is kept in the browser's local storage between visits.
Why structure matters
A vague prompt produces an agent that wanders. A structured one, with a clear role, a defined workflow, explicit guardrails, and a precise output contract, produces an agent that does the job and stops. This tool just makes that structure easy to assemble and reuse.
License
MIT. See [LICENSE.txt](LICENSE.txt). The original single-form version is preserved at [`tools-agent-prompt-builder-v2.html`](tools-agent-prompt-builder-v2.html).
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