Claude Code Ultimate Guide is a structured documentation project for learning how to build, operate, and govern coding agents with Claude Code. It serves developers and teams through guidance on agentic workflows, hooks, skills, MCP servers, security, and adoption. The catalogue entries are reusable skills, commands, agents, hooks, instructions, settings, and a plugin drawn from the guide's workflow materials.
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.
npx skills add FlorianBruniaux/claude-code-ultimate-guide --skill eval-skillsgit clone --depth 1 https://github.com/FlorianBruniaux/claude-code-ultimate-guideWrote 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.
[](https://agentmods.dev/skills/florianbruniaux/claude-code-ultimate-guide/eval-skills)<a href="https://agentmods.dev/skills/florianbruniaux/claude-code-ultimate-guide/eval-skills"><img src="https://agentmods.dev/badge/skills/florianbruniaux/claude-code-ultimate-guide/eval-skills/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/florianbruniaux/claude-code-ultimate-guide/eval-skills"><img src="https://agentmods.dev/badge/skills/florianbruniaux/claude-code-ultimate-guide/eval-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Agent Snooping · line 180 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- high Agent Snooping · line 183 Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
- medium Agent Snooping · line 180 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00060 | $0.04774 |
| Opus 5.5 | $0.00024 | $0.01910 |
| Sonnet 5.5 | $0.00012 | $0.00955 |
| Haiku 4.5 | $0.00006 | $0.00477 |
Grade A, and why
eval-skills scanned grade A with 2 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 20d 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.
Codex follows symlinked skill folders. A skill disabled with a `[[skills.config]]` entry (`enabled = false`) in `~/.codex/config.toml` is reported as disabled, not scored as broken. Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Enumerates other installed skillslowAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
find .claude/skills .agents/skills -name SKILL.md -not -path '*/.trash/*' 2>/dev/null Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
The source is not reproduced here
Licensed CC-BY-SA-4.0
The repository is licensed CC-BY-SA-4.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- 20d ago Changed a5a02ea4afd2
- 22d ago Changed · +34 lines · -7 tokens per session 9873adb826bd
- 1mo ago First seen · 269 lines · 67 tokens per session scan A dbec825a7063
eval-skills is a skill published in the GitHub repository FlorianBruniaux/claude-code-ultimate-guide (6,218 stars, last pushed today), licensed CC-BY-SA-4.0. It adds 60 tokens to every session and 4,774 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 2 findings (reads agent configuration directories, enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
second-opinion
Cross-validate code, architecture or design decisions using a second model. Use for critical decisions, complex refactoring, security reviews.
code-review
A code-review procedure for checking whether changes meet their requirements, behave correctly, stay within safe boundaries, and have effective tests.
code-review-loop
Use when opening a PR for review or when receiving review feedback. Activate for keywords like "code review", "PR review", "request review", "review feedback", "address comments", "reviewer said". Covers both ends of the loop: preparing a reviewable PR and acting on feedback rigorously. Always engage with every…
aio-review-deep
Deep multi-agent code review — dispatch a fleet of parallel specialized agents (security, architecture, quality, performance) with GitNexus domain analysis. Use before merging a PR or after a major feature lands when a single-pass review is too shallow. For a quick pre-commit sanity check use aio-review-quick.
aio-map
Trace dependencies, call graphs, and blast radius for a file/function/module via GitNexus + LSP. Step 2 of the codeflow discover → map → plan trio (after aio-discover, before aio-plan).
devops
DevOps patterns: containerization, CI/CD, deployment strategies, monitoring. Use when containerizing apps, setting up pipelines, or deploying services.