root-cause-first

root-cause-first is a skill for Claude Code, Codex from Hawkynt/ClaudeCodePortable. It costs 79 tokens per session (752 once invoked), scanned A, original, LGPL-3.0.

A debugging procedure that starts with a reproducible failure, isolates its cause, fixes that cause, and checks the original failure again.

In plain words
What is it for?
Use it for failing tests, bugs, crashes, incorrect output, and unreliable behavior.
Why use it?
It prevents changes based only on guesses and helps distinguish a real fix from a workaround that leaves the underlying problem.

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 for failing tests, bugs, crashes, incorrect output, and unreliable behavior.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hawkynt/claudecodeportable/root-cause-first
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 Hawkynt/ClaudeCodePortable --skill root-cause-first
Clone the repo
git clone --depth 1 https://github.com/Hawkynt/ClaudeCodePortable

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 root-cause-first

README.md
[![agentmods](https://agentmods.dev/badge/skills/hawkynt/claudecodeportable/root-cause-first.svg)](https://agentmods.dev/skills/hawkynt/claudecodeportable/root-cause-first)
Your own site
<a href="https://agentmods.dev/skills/hawkynt/claudecodeportable/root-cause-first"><img src="https://agentmods.dev/badge/skills/hawkynt/claudecodeportable/root-cause-first.svg" alt="Measured on agentmods" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 752 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 $0.00079 $0.00752
Opus 5 $0.00039 $0.00376
Sonnet 5 $0.00016 $0.00150
Haiku 4.5 $0.00008 $0.00075

Measured 7d ago against content hash fd707b139abd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

root-cause-first 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.

templates/skills/root-cause-first/SKILL.md · 35 lines

The source is not reproduced here

Licensed LGPL-3.0

The repository is licensed LGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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 · 35 lines · 79 tokens per session scan A fd707b139abd

Subscribe to this mod's changes

root-cause-first is a skill published in the GitHub repository Hawkynt/ClaudeCodePortable (2 stars, last pushed 28d ago), licensed LGPL-3.0. It adds 79 tokens to every session and 752 once invoked, about $0.0004 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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