prompt-forge

prompt-forge is a skill for Claude Code from krzemienski/proofpunk. It costs 181 tokens per session (4,132 once invoked), scanned A, original, no licence file.

A prompt-design toolkit for writing, testing, scoring, and improving instructions for AI models. It also helps organize several prompts into multi-step pipelines stored in .prompts directories.

In plain words
What is it for?
Use it to create prompts, rate their quality, test their results, fix recurring failures, and connect prompts into staged workflows.
Why use it?
It replaces guesswork with a repeatable way to find weak instructions and improve them using test cases, measurements, and real failure examples.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the proofpunk plugin — 18 skills, 12 commands, 3 agents, 7 hooks shipped together

Good fit Use it to create prompts, rate their quality, test their results, fix recurring failures, and connect prompts into staged workflows.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/krzemienski/proofpunk/prompt-forge
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add krzemienski/proofpunk --skill prompt-forge
Clone the repo
git clone --depth 1 https://github.com/krzemienski/proofpunk

Made for: Claude Code.

Or install proofpunk, the plugin that ships this one along with the rest of its 18 skills, 12 commands, 3 agents, 7 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for prompt-forge

README.md
[![agentmods](https://agentmods.dev/badge/skills/krzemienski/proofpunk/prompt-forge/github.svg)](https://agentmods.dev/skills/krzemienski/proofpunk/prompt-forge)
Your own site
<a href="https://agentmods.dev/skills/krzemienski/proofpunk/prompt-forge"><img src="https://agentmods.dev/badge/skills/krzemienski/proofpunk/prompt-forge/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for prompt-forge

Your own site · 80×15
<a href="https://agentmods.dev/skills/krzemienski/proofpunk/prompt-forge"><img src="https://agentmods.dev/badge/skills/krzemienski/proofpunk/prompt-forge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 181 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,132 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00181 $0.04132
Opus 5 $0.00090 $0.02066
Sonnet 5 $0.00036 $0.00826
Haiku 4.5 $0.00018 $0.00413

Measured 8d ago against content hash 52134b6e37a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

prompt-forge scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/proofpunk/skills/prompt-forge/SKILL.md · 362 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 362 lines · 181 tokens per session scan A 52134b6e37a6

Subscribe to this mod's changes

prompt-forge is a skill published in the GitHub repository krzemienski/proofpunk (4 stars, last pushed 4d ago), with no licence file. It adds 181 tokens to every session and 4,132 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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