harden

harden is a skill for Claude Code, Codex from poseljacob/hq. It costs 32 tokens per session (2,178 once invoked), scanned A, original, no licence file.

A user-interface improvement workflow focused on errors, language support, text that does not fit, and unusual cases.

In plain words
What is it for?
Improving error handling, translation support, text overflow behavior, and edge cases in interfaces.
Why use it?
It helps prevent interfaces from breaking or becoming confusing when real-world inputs and conditions differ from the usual path.

Skill for Claude CodeCodex

Written for Claude Code and Codex: installed under .claude/, but also agents/openai.yaml present.

Good fit Improving error handling, translation support, text overflow behavior, and edge cases in…

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

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 harden

README.md
[![agentmods](https://agentmods.dev/badge/skills/poseljacob/hq/harden.svg)](https://agentmods.dev/skills/poseljacob/hq/harden)
Your own site
<a href="https://agentmods.dev/skills/poseljacob/hq/harden"><img src="https://agentmods.dev/badge/skills/poseljacob/hq/harden.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,178 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 $0.00032 $0.02178
Opus 5 $0.00016 $0.01089
Sonnet 5 $0.00006 $0.00436
Haiku 4.5 $0.00003 $0.00218

Measured 6d ago against content hash 6114cdc92bd9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

harden 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 6d 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.

template/.claude/skills/harden/SKILL.md · 357 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 357 lines · 32 tokens per session scan A 6114cdc92bd9

Subscribe to this mod's changes

harden is a skill published in the GitHub repository poseljacob/hq (2 stars, last pushed 5mo ago), with no licence file. It adds 32 tokens to every session and 2,178 once invoked, about $0.0002 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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