skill-benchmark

skill-benchmark is a skill for Codex from HoangNguyen0403/agent-skills-standard. It costs 16 tokens per session (739 once invoked), scanned A, original, MIT.

A benchmarking workflow that measures how well an AI skill handles real implementation constraints and reports the gaps it finds.

In plain words
What is it for?
It is for comparing implementation results, checking common code problems, and producing a report on skill effectiveness.
Why use it?
It helps teams see whether a skill improves code quality and where recurring mistakes remain.

Skill for Codex

Written for Codex: installed under .codex/. Also seen: mentions AGENTS.md.

Good fit It is for comparing implementation results, checking common code problems, and producing a report on skill effectiveness.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hoangnguyen0403/agent-skills-standard/skill-benchmark
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 HoangNguyen0403/agent-skills-standard --skill skill-benchmark
Clone the repo
git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard

Made for: 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 skill-benchmark

README.md
[![agentmods](https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/skill-benchmark/github.svg)](https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/skill-benchmark)
Your own site
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/skill-benchmark"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/skill-benchmark/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 skill-benchmark

Your own site · 80×15
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/skill-benchmark"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/skill-benchmark.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 739 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 pass 7 Sept 2026
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 $0.00016 $0.00739
Opus 5.5 $0.00006 $0.00296
Sonnet 5.5 $0.00003 $0.00148
Haiku 4.5 $0.00002 $0.00074

Measured 19d ago against content hash a5f5179a9450, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skill-benchmark 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 19d 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.

.codex/skills/skill-benchmark/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Benchmark Skill

[!IMPORTANT] Benchmark AI skill effectiveness by measuring implementation quality against legacy constraints.

Optional args: slug=, ticket=<id/url>, mode=interactive|autonomous|channel, channel=, auto_continue=true|false, profile=business|hybrid|technical.

Instructions

When the user asks to perform this workflow, execute the following steps:

📊 Skill Benchmark Orchestrator

Goal: Quantify how much active skills improve implementation quality. Deliver a prioritized compliance delta and skill applicability report.


Step 1 — Project Context & Active Skills

Identify the tech stack and all active skills in AGENTS.md.

# 1. Total source files and lines changed
find src -name "*.ts" -o -name "*.tsx" | xargs wc -l 2>/dev/null | sort -rn | head -20
# 2. Check active skill registry
cat AGENTS.md | head -80

Step 2 — Auto-Select a Legacy Trap

Pick the file automatically. Rank candidates by the severity of anti-patterns:

  • 🔴 P0: Hardcoded secrets; Logic inside UI components.
  • 🟠 P1: Wrong Router pattern; Global state for local concerns; Missing design tokens.
  • 🟡 P2: Raw user-facing strings (i18n).

Step 3 — Build Eval-Driven Scorecard

Source scorecard from evals/evals.json. Distinguish structural checks, textual transcript assertions, and executable verifier outcomes. Never add canned assertion keywords to skills to artificially inflate scores (no answer-anchor padding). Follow the Scorecard Rubric in <SKILLS>/common/common-skill-creator/references/benchmark.md when synced:

  1. Read <SKILLS>/<category>/<skill>/evals/evals.json.
  2. Generate columns for Failure Pattern and Success Pattern.
  3. Refactor the file, citing the exact skill rule for each change.
  4. For guardrail skills, read pressure_scenarios, rationalizations, red_flags, and behavior_assertions.

Step 4 — Benchmark Report & Evidence Breakdown

Output scorecard and evidence breakdown using templates in <SKILLS>/common/common-skill-creator/references/benchmark.md when synced.

Read the full file on GitHub · 90 lines

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. 19d ago Changed · -4 lines a5f5179a9450
  2. 27d ago Changed · +1 lines d7d59d734a37
  3. 1mo ago First seen · 93 lines · 16 tokens per session scan A 2cc98735a90d

Subscribe to this mod's changes

skill-benchmark is a skill published in the GitHub repository HoangNguyen0403/agent-skills-standard (583 stars, last pushed today), licensed MIT. It adds 16 tokens to every session and 739 once invoked, about $0.0001 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 2026-09-03.

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