runtime-proof

runtime-proof is a skill for Claude Code, Codex from pku-liang/hwe-bench. It costs 15 tokens per session (48 once invoked), scanned A, a copy of runtime-proof, Apache-2.0.

A tiny runtime test for checking whether a skill was injected into an agent environment. Its instruction is to create a proof file containing a specific line of text.

In plain words
What is it for?
It helps test skill injection by writing the required confirmation text to `/app/skill-proof.txt`.
Why use it?
It provides a simple, observable result for verifying that the runtime skill-loading mechanism worked.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It helps test skill injection by writing the required confirmation text to /app/skill-proof.txt.

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

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 runtime-proof

README.md
[![agentmods](https://agentmods.dev/badge/skills/pku-liang/hwe-bench/runtime-proof/github.svg)](https://agentmods.dev/skills/pku-liang/hwe-bench/runtime-proof)
Your own site
<a href="https://agentmods.dev/skills/pku-liang/hwe-bench/runtime-proof"><img src="https://agentmods.dev/badge/skills/pku-liang/hwe-bench/runtime-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 runtime-proof

Your own site · 80×15
<a href="https://agentmods.dev/skills/pku-liang/hwe-bench/runtime-proof"><img src="https://agentmods.dev/badge/skills/pku-liang/hwe-bench/runtime-proof.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 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.
Origin 100% copy Near-identical to another mod 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 $0.00015 $0.00048
Opus 5.5 $0.00006 $0.00019
Sonnet 5.5 $0.00003 $0.00010
Haiku 4.5 $0.00002 $0.00005

Measured 2mo ago against content hash 2f94afa33000, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

runtime-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 2mo 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.

Origin

This is a copy

100% identical to runtime-proof — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

deps/harbor/examples/jobs/skills-merge/skills/runtime-proof/SKILL.md · 13 lines

What it actually says

runtime-proof

Write exactly this text to /app/skill-proof.txt:

runtime skill injected successfully
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. 2mo ago First seen · 13 lines · 15 tokens per session scan A 2f94afa33000

Subscribe to this mod's changes

runtime-proof is a skill published in the GitHub repository pku-liang/hwe-bench (70 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 15 tokens to every session and 48 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to runtime-proof, differing in 0 lines, and is treated as a copy.

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