proof

proof is a skill for Claude Code from fredrikaverpil/dotfiles. It costs 9 tokens per session (48 once invoked), scanned A, original, MIT.

A proof-related skill, but the available information only identifies its instruction file.

In plain words
What is it for?
There is not enough information to identify its concrete jobs.
Why use it?
There is not enough information to say what problem it removes.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Good fit There is not enough information to identify its concrete jobs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fredrikaverpil/dotfiles/proof
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 fredrikaverpil/dotfiles --skill proof
Clone the repo
git clone --depth 1 https://github.com/fredrikaverpil/dotfiles

Made for: Claude Code.

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 proof

README.md
[![agentmods](https://agentmods.dev/badge/skills/fredrikaverpil/dotfiles/proof/github.svg)](https://agentmods.dev/skills/fredrikaverpil/dotfiles/proof)
Your own site
<a href="https://agentmods.dev/skills/fredrikaverpil/dotfiles/proof"><img src="https://agentmods.dev/badge/skills/fredrikaverpil/dotfiles/proof/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 proof

Your own site · 80×15
<a href="https://agentmods.dev/skills/fredrikaverpil/dotfiles/proof"><img src="https://agentmods.dev/badge/skills/fredrikaverpil/dotfiles/proof.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 48 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 1
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
Origin original 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 $0.00009 $0.00048
Opus 5.5 $0.00004 $0.00019
Sonnet 5.5 $0.00002 $0.00010
Haiku 4.5 $0.00001 $0.00005

Measured 20d ago against content hash e5d966a564b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

proof 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 20d 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.

stow/shared/.claude/skills/proof/SKILL.md · 11 lines

What it actually says

Proof

Seek out proof or some reference to your claim(s). Provide link(s).

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. 20d ago Changed · +10 lines · +9 tokens per session e5d966a564b4
  2. 2mo ago First seen · 1 lines · 0 tokens per session scan A f03148375fd6

Subscribe to this mod's changes

proof is a skill published in the GitHub repository fredrikaverpil/dotfiles (259 stars, last pushed yesterday), licensed MIT. It adds 9 tokens to every session and 48 once invoked, about $0.0000 per session on Opus 5.5. 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.

Related

proof compared with skills from other repositories

proof next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
prooffredrikaverpil/dotfilesSkill259yesterdayMITA9Claude Code
writing-skillsdenolfe/dotfilesSkill884d agononeA20Claude Code, Codex
brainstormingdenolfe/dotfilesSkill884d agononeA37Claude Code, Codex
executing-plansdenolfe/dotfilesSkill884d agononeA35Claude Code, Codex
userscriptsdenolfe/dotfilesSkill884d agononeA36Claude Code, Codex
writing-plansdenolfe/dotfilesSkill884d agononeA21Claude Code, Codex
finishing-a-development-branchdenolfe/dotfilesSkill884d agononeA27Claude Code, Codex