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 security-checkgit 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/security-check)<a href="https://agentmods.dev/skills/florianbruniaux/claude-code-ultimate-guide/security-check"><img src="https://agentmods.dev/badge/skills/florianbruniaux/claude-code-ultimate-guide/security-check/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/security-check"><img src="https://agentmods.dev/badge/skills/florianbruniaux/claude-code-ultimate-guide/security-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00011 | $0.02347 |
| Opus 5.5 | $0.00004 | $0.00939 |
| Sonnet 5.5 | $0.00002 | $0.00469 |
| Haiku 4.5 | $0.00001 | $0.00235 |
Grade C, and why
security-check scanned grade C with 5 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 16d 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.
Downloads and executes remote codemediumSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
- [ ] Executable scripts with `curl | bash` or remote eval? → CRITICAL Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Reads agent configuration directorieslowAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
find .claude/hooks/ -type f 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.
Reads MCP configurationlowAgent snooping
mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.
cat .mcp.json 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.
Enumerates other installed skillslowAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
ls -la .claude/skills/ 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
xargs grep -l "curl.*|\|wget.*|\|bash.*http\|eval.*curl" 2>/dev/null 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.
- 16d ago Changed 053c1c9ca87f
- 1mo ago First seen · 218 lines · 11 tokens per session scan C 14a8e4214879
security-check is a skill published in the GitHub repository FlorianBruniaux/claude-code-ultimate-guide (6,191 stars, last pushed yesterday), licensed CC-BY-SA-4.0. It adds 11 tokens to every session and 2,347 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it C with 5 findings (downloads and executes remote code, reads agent configuration directories, reads mcp configuration). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
devops
DevOps patterns: containerization, CI/CD, deployment strategies, monitoring. Use when containerizing apps, setting up pipelines, or deploying services.
learning
Extracts reusable patterns from sessions. Use at session end to capture debugging insights and project-specific knowledge.
api
RESTful API design patterns and best practices. Use when creating endpoints, designing APIs, or implementing routes.
architecture
Architecture design skill: ADR records, system design checklists, scalability assessment, architecture patterns. Use for complex system design and architecture decisions.
database
Database design, query optimization, migrations, and indexing. Use when designing schemas, writing queries, or managing migrations.
debug
Systematic debugging methods, log analysis, and performance diagnostics. Use when debugging issues, analyzing errors, or troubleshooting incidents.