crucible

crucible is a skill for Claude Code, Codex from JZKK720/cubecloud-skills-bundle-kit. It costs 0 tokens per session (4,395 once invoked), scanned A, original, no licence file.

A three-phase process for making project plans more robust by first examining the codebase, documentation, prior work, technical choices, and known risks.

In plain words
What is it for?
Use it to harden plans for existing codebases or new projects and to record the assumptions behind those plans.
Why use it?
It helps expose missing context, assumptions, and pitfalls before implementation begins.

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 to harden plans for existing codebases or new projects and to record the assumptions behind those plans.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jzkk720/cubecloud-skills-bundle-kit/crucible
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 JZKK720/cubecloud-skills-bundle-kit --skill crucible
Clone the repo
git clone --depth 1 https://github.com/JZKK720/cubecloud-skills-bundle-kit

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 crucible

README.md
[![agentmods](https://agentmods.dev/badge/skills/jzkk720/cubecloud-skills-bundle-kit/crucible.svg)](https://agentmods.dev/skills/jzkk720/cubecloud-skills-bundle-kit/crucible)
Your own site
<a href="https://agentmods.dev/skills/jzkk720/cubecloud-skills-bundle-kit/crucible"><img src="https://agentmods.dev/badge/skills/jzkk720/cubecloud-skills-bundle-kit/crucible.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,395 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 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 $0.00000 $0.04395
Opus 5 $0.00000 $0.02197
Sonnet 5 $0.00000 $0.00879
Haiku 4.5 $0.00000 $0.00439

Measured 8d ago against content hash 23139615bae5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

crucible scanned grade A 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 8d 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.

Reads agent configuration directorieslowAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

- **Echo the active model before Round 1** so the user can confirm: read the `model` line from `~/.codex/config.toml` (if absent, report "CLI default"). State it alongside the resolved tunables, e.g. `Reviewer model: CLI

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

upstream/crucible/SKILL.md · 218 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 8d ago First seen · 218 lines · 0 tokens per session scan A 23139615bae5

Subscribe to this mod's changes

crucible is a skill published in the GitHub repository JZKK720/cubecloud-skills-bundle-kit (3 stars, last pushed 21d ago), with no licence file. It costs nothing until one of its globs matches a file; then it loads 4,395 tokens. A static security scan graded it A with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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