fragile

fragile is a skill for Claude Code from davesheffer/hunch. It costs 15 tokens per session (88 once invoked), scanned A, original, Apache-2.0.

A report that ranks the most fragile parts of a codebase using evidence from Hunch, including affected files and functions, bug history, change frequency, and usage connections.

In plain words
What is it for?
Use it to identify fragile files or functions, review their past bugs and changes, and find missing safeguards.
Why use it?
It replaces general guesses about risky code with specific evidence about where failures are more likely.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the hunch plugin — 5 skills, 1 MCP server shipped together

Good fit Use it to identify fragile files or functions, review their past bugs and changes, and find missing safeguards.

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

Made for: Claude Code.

Or install hunch, the plugin that ships this one along with the rest of its 5 skills, 1 MCP server.

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 fragile

README.md
[![agentmods](https://agentmods.dev/badge/skills/davesheffer/hunch/fragile.svg)](https://agentmods.dev/skills/davesheffer/hunch/fragile)
Your own site
<a href="https://agentmods.dev/skills/davesheffer/hunch/fragile"><img src="https://agentmods.dev/badge/skills/davesheffer/hunch/fragile.svg" alt="Measured on agentmods" 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 88 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 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 $0.00015 $0.00088
Opus 5 $0.00008 $0.00044
Sonnet 5 $0.00003 $0.00018
Haiku 4.5 $0.00002 $0.00009

Measured 7d ago against content hash 2057ad102f4c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

fragile 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.

plugin/skills/fragile/SKILL.md · 8 lines

What it actually says

Ask Hunch for the fragility ranking (run hunch fragile or query Hunch), then produce a fragility report with evidence: the specific files/functions, the bug history behind them, their churn and fan-in, and any missing guards. Avoid generic advice — every claim must cite a Hunch record or metric.

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 · 8 lines · 15 tokens per session scan A 2057ad102f4c

Subscribe to this mod's changes

fragile is a skill published in the GitHub repository davesheffer/hunch (9 stars, last pushed yesterday), licensed Apache-2.0. It adds 15 tokens to every session and 88 once invoked, about $0.0001 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.

Related

Other skills, from other repositories

changes-report

Report all repository changes that entered a target branch during one required date or period, grouped by product change and written as plain English for a broad audience. Use for daily, weekly, date-range, or relative-period change summaries rather than explaining one known diff.

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jira-issue-create

Create one or more Jira issues through acli from user-approved drafts using heading-based Context, Acceptance criteria, and Engineering notes sections. Use only when explicitly invoked to create Jira issues; use jira-issue-refine when requirements still need refinement.

yarlson/yarstack · 53 tokens

claude-review

Run an independent Claude Opus review of the complete current change against the repository's default branch, then verify its findings locally. Use after focused checks pass when you want a second model to review the change before further edits or delivery.

yarlson/yarstack · 50 tokens

test-gap-review

Review whether existing tests and verification credibly prove a scoped behavior contract. Use during validation when evidence may omit important behavior or provide false confidence.

yarlson/yarstack · 32 tokens

jira-issue-deliver

Autonomously deliver one Jira issue from intake to a ready GitHub pull request. Use only when the user authorizes implementation, commits, pushes, PR state changes, CI remediation, and resolution of requested automated review feedback.

yarlson/yarstack · 51 tokens

change-cleanup-review

Review a complete change for unwanted scope, redundant or residual artifacts, review-obscuring churn or prose, hollow verification, and work shifted to reviewers. Use before human review and after review-driven fixes, not for general implementation review or AI-authorship inference.

yarlson/yarstack · 56 tokens