Security And Hardening
penpot/penpot
Hardens code against vulnerabilities. An agent skill from penpot/penpot.
Comprehensive threat modeling for multi-agent systems using CSA MAESTRO 7-layer framework and OWASP Multi-Agentic System Threat Modeling Guide v1.0.
$ npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install OWASP/secure-agent-playbook multi-agentic-threat-model --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/OWASP/secure-agent-playbook.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/multi-agentic-threat-model .claude/skills/multi-agentic-threat-model && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "multi-agentic-threat-model" agent skill from https://github.com/OWASP/secure-agent-playbook/tree/main/.claude/skills/multi-agentic-threat-model into .claude/skills/multi-agentic-threat-model/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-agentic-threat-model", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/OWASP/secure-agent-playbook/tree/main/.claude/skills/multi-agentic-threat-modelType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install OWASP/secure-agent-playbook multi-agentic-threat-model --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OWASP/secure-agent-playbook.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/multi-agentic-threat-model .agents/skills/multi-agentic-threat-model && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "multi-agentic-threat-model" agent skill from https://github.com/OWASP/secure-agent-playbook/tree/main/.claude/skills/multi-agentic-threat-model into .agents/skills/multi-agentic-threat-model/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-agentic-threat-model", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install OWASP/secure-agent-playbook multi-agentic-threat-model --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OWASP/secure-agent-playbook.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/multi-agentic-threat-model .cursor/skills/multi-agentic-threat-model && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "multi-agentic-threat-model" agent skill from https://github.com/OWASP/secure-agent-playbook/tree/main/.claude/skills/multi-agentic-threat-model into .cursor/skills/multi-agentic-threat-model/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-agentic-threat-model", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/OWASP/secure-agent-playbook.git --path .claude/skills/multi-agentic-threat-model--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install OWASP/secure-agent-playbook multi-agentic-threat-model --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OWASP/secure-agent-playbook.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/multi-agentic-threat-model .gemini/skills/multi-agentic-threat-model && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "multi-agentic-threat-model" agent skill from https://github.com/OWASP/secure-agent-playbook/tree/main/.claude/skills/multi-agentic-threat-model into .gemini/skills/multi-agentic-threat-model/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-agentic-threat-model", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install OWASP/secure-agent-playbook multi-agentic-threat-modelInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/OWASP/secure-agent-playbook.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/multi-agentic-threat-model .github/skills/multi-agentic-threat-model && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "multi-agentic-threat-model" agent skill from https://github.com/OWASP/secure-agent-playbook/tree/main/.claude/skills/multi-agentic-threat-model into .github/skills/multi-agentic-threat-model/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-agentic-threat-model", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install OWASP/secure-agent-playbook multi-agentic-threat-model --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/OWASP/secure-agent-playbook.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/multi-agentic-threat-model .opencode/skills/multi-agentic-threat-model && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "multi-agentic-threat-model" agent skill from https://github.com/OWASP/secure-agent-playbook/tree/main/.claude/skills/multi-agentic-threat-model into .opencode/skills/multi-agentic-threat-model/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multi-agentic-threat-model", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
multi-agentic-threat-modelComprehensive threat modeling for multi-agent systems using CSA MAESTRO 7-layer framework and OWASP Multi-Agentic System Threat Modeling Guide v1.0.
Multi Agentic Threat Model is an agent skill from OWASP/secure-agent-playbook. Comprehensive threat modeling for multi-agent systems using CSA MAESTRO 7-layer framework and OWASP Multi-Agentic System Threat Modeling Guide v1.0. Systematically analyzes threats across all architectural layers from foundation models to agent ecosystems.
Its SKILL.md is about 840 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Security, covering Threat modeling, Web application vulnerabilities and Mobile testing and debugging. The repository describes itself as: OWASP Secure Agent Playbook Project.
6 steps, taken from the first numbered list in SKILL.md.
Read from SKILL.md and the folder at commit 1b5fd4c. It shows what the files ask for, not the result of running them.
Pre-approves these tools, so the agent can use them without asking each time:
ReadGrepGlobBashWebFetchAgentFrom allowed-tools in the SKILL.md frontmatter.
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Multi Agentic Threat Model loads about 835 tokens when it runs. Until then it costs about 71 tokens; SKILL.md has 313 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
The automated check noted patterns worth knowing about, such as sudo or a known installer.
allowed-tools: Read, Grep, Glob, Bash, WebFetch, AgentAutomated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 313 words (~835 tokens).
“Conduct comprehensive threat modeling for multi-agent systems using the Cloud Security Alliance (CSA) MAESTRO framework's 7-layer architecture and OWASP Multi-Agentic System Threat Modeling Guide v1.0.”
Just SKILL.md in .claude/skills/multi-agentic-threat-model of OWASP/secure-agent-playbook.
Open the folder on GitHubat commit 1b5fd4c
Multi Agentic Threat Model next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Multi Agentic Threat Model this skillOWASP/secure-agent-playbook | 187 | — | ~835 | Automated safety check: Notes | Custom licence | |
| Security And Hardeningpenpot/penpot | 61k | 6 repos | ~4.7k | Automated safety check: Notes | MPL-2.0 | |
| Security Audit Scannerruvnet/ruflo | 74k | 2 repos | ~823 | Automated safety check: Pass | MIT | |
| Security and Hardeningaddyosmani/agent-skills | 103k | 1 repos | ~4.4k | Automated safety check: Notes | MIT | |
| CybersecurityAgriciDaniel/claude-cybersecurity | 227 | — | ~11k | Automated safety check: Warn | MIT | |
| Securitygaragon/nanostack | 207 | — | ~3.7k | Automated safety check: Notes | Apache-2.0 |
penpot/penpot
Hardens code against vulnerabilities. An agent skill from penpot/penpot.
ruvnet/ruflo
Runs claude-flow CLI security scans for input validation, path traversal, SQL injection, XSS, hardcoded secrets and known CVEs, and writes an audit report.
addyosmani/agent-skills
Applies a threat-model-first approach to web code that handles untrusted input, authentication, data storage, dependencies or personal data.
AgriciDaniel/claude-cybersecurity
Ultimate AI-powered cybersecurity code review skill. An agent skill from AgriciDaniel/claude-cybersecurity.
garagon/nanostack
Use before shipping to production. An agent skill from garagon/nanostack.
xenitV1/Antigravity-Workflows
Advanced vulnerability analysis principles. An agent skill from xenitV1/Antigravity-Workflows.
OWASP/secure-agent-playbook
Enhance PRDs, feature specs, user stories, or product briefs with explicit OWASP ASVS coverage and FIASSE v1.0.4 SSEM implementation guidance — before code is written.
OWASP/secure-agent-playbook
Score a codebase, file, or merge request against the FIASSE v1.0.4 SSEM model — 0-10 per attribute, equal-weighted pillars, evidence-backed strengths and weaknesses, prioritized recommendations…
OWASP/secure-agent-playbook
Generate, scaffold, or refactor code so it embodies FIASSE v1.0.4 SSEM qualities by default — 10 attributes, Transparency and Least-Astonishment principles, ASVS-aligned controls, defensive boundary…
OWASP/secure-agent-playbook
Audit AI agent configurations for security risks — excessive permissions, prompt injection surfaces, data exfiltration paths, and missing guardrails.
OWASP/secure-agent-playbook
Comprehensive AI security verification using OWASP AI Security Verification Standard (AISVS) framework.
OWASP/secure-agent-playbook
Comprehensive API security review against OWASP API Security Top 10 (2023).
Categories
Comprehensive threat modeling for multi-agent systems using CSA MAESTRO 7-layer framework and OWASP Multi-Agentic System Threat Modeling Guide v1.0. Multi Agentic Threat Model is an agent skill from OWASP/secure-agent-playbook.0.
Multi Agentic Threat Model fits situations like: tasks that involve Threat modeling; tasks that involve Web application vulnerabilities; tasks that involve Mobile testing and debugging.
Run `npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a claude-code`. Or copy the skill folder (.claude/skills/multi-agentic-threat-model in OWASP/secure-agent-playbook) into .claude/skills/multi-agentic-threat-model in your project. Claude Code loads it when a task matches its description.
Run `npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a codex`. Or copy the skill folder (.claude/skills/multi-agentic-threat-model in OWASP/secure-agent-playbook) into .agents/skills/multi-agentic-threat-model in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add OWASP/secure-agent-playbook --skill multi-agentic-threat-model -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/multi-agentic-threat-model, .gemini/skills/multi-agentic-threat-model, .github/skills/multi-agentic-threat-model and .opencode/skills/multi-agentic-threat-model in your project.
SKILL.md names no scripts, command-line tools or credentials: Multi Agentic Threat Model is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Grep, Glob, Bash, WebFetch, Agent.
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
Multi Agentic Threat Model has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
About 835 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Multi Agentic Threat Model: Security And Hardening (penpot/penpot, 61k stars), Security Audit Scanner (ruvnet/ruflo, 74k stars), Security and Hardening (addyosmani/agent-skills, 103k stars) and Cybersecurity (AgriciDaniel/claude-cybersecurity, 227 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
OWASP (a GitHub organization) maintains it in OWASP/secure-agent-playbook, which has 187 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 25, 2026.
Source: OWASP/secure-agent-playbook on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.