prove-plus-comm

prove-plus-comm is a skill for Claude Code, Codex from lazyFrogLOL/Harness_Engineering. It costs 59 tokens per session (1,253 once invoked), scanned A, original, no licence file.

A guide to proving arithmetic statements in Coq, a system that checks mathematical proofs written as code.

In plain words
What is it for?
Use it to prove addition properties such as commutativity in Coq proof files, including proofs that use lemmas like plusnO and plusnSm.
Why use it?
It helps structure proofs about natural numbers when simple arithmetic rules are not enough and induction is needed.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to prove addition properties such as commutativity in Coq proof…

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lazyfroglol/harness_engineering/prove-plus-comm
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 lazyFrogLOL/Harness_Engineering --skill prove-plus-comm
Clone the repo
git clone --depth 1 https://github.com/lazyFrogLOL/Harness_Engineering

Made for: Claude Code, Codex.

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 prove-plus-comm

README.md
[![agentmods](https://agentmods.dev/badge/skills/lazyfroglol/harness_engineering/prove-plus-comm.svg)](https://agentmods.dev/skills/lazyfroglol/harness_engineering/prove-plus-comm)
Your own site
<a href="https://agentmods.dev/skills/lazyfroglol/harness_engineering/prove-plus-comm"><img src="https://agentmods.dev/badge/skills/lazyfroglol/harness_engineering/prove-plus-comm.svg" alt="Measured on agentmods" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,253 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 $0.00059 $0.01253
Opus 5 $0.00030 $0.00626
Sonnet 5 $0.00012 $0.00251
Haiku 4.5 $0.00006 $0.00125

Measured 7d ago against content hash 436dc4c99b76, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

prove-plus-comm 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 7d 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.

skills/prove-plus-comm/SKILL.md · 123 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 7d ago First seen · 123 lines · 59 tokens per session scan A 436dc4c99b76

Subscribe to this mod's changes

prove-plus-comm is a skill published in the GitHub repository lazyFrogLOL/Harness_Engineering (126 stars, last pushed 3mo ago), with no licence file. It adds 59 tokens to every session and 1,253 once invoked, about $0.0003 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 2026-08-30.

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