hook-friction-assessment

hook-friction-assessment is a skill for Claude Code from dinglebear-ai/cortex. It costs 114 tokens per session (1,423 once invoked), scanned B, original, AGPL-3.0.

A diagnostic guide for investigating failed or unreliable agent hooks. Hooks are automated actions that run when a coding tool performs a specified event.

In plain words
What is it for?
Use it after collecting hook incident evidence to assess hook failures, timeouts, misfires, and other reliability problems.
Why use it?
It helps explain whether a hook failed, timed out, ran at the wrong time, or otherwise made an agent session less reliable.

Skill for Claude Code

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

Part of the cortex plugin — 12 skills, 1 MCP server shipped together

Good fit Use it after collecting hook incident evidence to assess hook failures, timeouts, misfires, and other reliability problems.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dinglebear-ai/cortex/hook-friction-assessment
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 dinglebear-ai/cortex --skill hook-friction-assessment
Clone the repo
git clone --depth 1 https://github.com/dinglebear-ai/cortex

Made for: Claude Code.

Or install cortex, the plugin that ships this one along with the rest of its 12 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 hook-friction-assessment

README.md
[![agentmods](https://agentmods.dev/badge/skills/dinglebear-ai/cortex/hook-friction-assessment.svg)](https://agentmods.dev/skills/dinglebear-ai/cortex/hook-friction-assessment)
Your own site
<a href="https://agentmods.dev/skills/dinglebear-ai/cortex/hook-friction-assessment"><img src="https://agentmods.dev/badge/skills/dinglebear-ai/cortex/hook-friction-assessment.svg" alt="Measured on agentmods" height="20"></a>
Per session 114 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,423 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. 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 $0.00114 $0.01423
Opus 5 $0.00057 $0.00711
Sonnet 5 $0.00023 $0.00285
Haiku 4.5 $0.00011 $0.00142

Measured 7d ago against content hash ad6706c26ff8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

hook-friction-assessment scanned grade B with 1 finding 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.

Instruction-override phrasingmediumPrompt injection

Text telling the model to disregard its earlier instructions or safety rules is the shape of a prompt injection, whoever wrote it.

at you (for example "ignore previous instructions", "you are now in

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

plugins/cortex/skills/hook-friction-assessment/SKILL.md · 126 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-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 · 126 lines · 114 tokens per session scan B ad6706c26ff8

Subscribe to this mod's changes

hook-friction-assessment is a skill published in the GitHub repository dinglebear-ai/cortex (3 stars, last pushed 2d ago), licensed AGPL-3.0. It adds 114 tokens to every session and 1,423 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it B with 1 finding (instruction-override phrasing). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.