Securing AI Systems
trilwu/secskills
Assess and harden LLM applications and agentic systems against prompt injection, tool misuse, excessive agency, memory poisoning, RAG data leakage, and model supply-chain risk, mapped to the OWASP…
Defensive security engineering judgment, distilled from a stronger model - invoke when THREAT MODELING a system or feature; making security-relevant design decisions (auth, crypto, trust boundaries…
Install Security
$ npx skills add telagod/code-abyss --skill security -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install telagod/code-abyss security --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/telagod/code-abyss.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/_kernel/security .claude/skills/security && 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 "security" agent skill from https://github.com/telagod/code-abyss/tree/main/skills/_kernel/security into .claude/skills/security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "security", 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/telagod/code-abyss/tree/main/skills/_kernel/securityType 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 telagod/code-abyss --skill security -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install telagod/code-abyss security --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/telagod/code-abyss.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/_kernel/security .agents/skills/security && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "security" agent skill from https://github.com/telagod/code-abyss/tree/main/skills/_kernel/security into .agents/skills/security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "security", 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 telagod/code-abyss --skill security -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install telagod/code-abyss security --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/telagod/code-abyss.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/_kernel/security .cursor/skills/security && 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 "security" agent skill from https://github.com/telagod/code-abyss/tree/main/skills/_kernel/security into .cursor/skills/security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "security", 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/telagod/code-abyss.git --path skills/_kernel/security--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 telagod/code-abyss --skill security -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install telagod/code-abyss security --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/telagod/code-abyss.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/_kernel/security .gemini/skills/security && 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 "security" agent skill from https://github.com/telagod/code-abyss/tree/main/skills/_kernel/security into .gemini/skills/security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "security", 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 telagod/code-abyss securityInstalls 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 telagod/code-abyss --skill security -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/telagod/code-abyss.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/_kernel/security .github/skills/security && 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 "security" agent skill from https://github.com/telagod/code-abyss/tree/main/skills/_kernel/security into .github/skills/security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "security", 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 telagod/code-abyss --skill security -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install telagod/code-abyss security --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/telagod/code-abyss.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/_kernel/security .opencode/skills/security && 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 "security" agent skill from https://github.com/telagod/code-abyss/tree/main/skills/_kernel/security into .opencode/skills/security/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "security", 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.
Facts
- Skill name
security- GitHub stars
- 244
- Token cost
- ~907 tokens
- SKILL.md length
- 376 words
- Files
- 8
- Skills in repo
- 38
- Repo updated
- First seen
- Licence
- MIT
At a glance
Defensive security engineering judgment, distilled from a stronger model - invoke when THREAT MODELING a system or feature; making security-relevant design decisions (auth, crypto, trust boundaries…
- Tasks that involve Threat modeling
- SKILL.md covers Route by moment, Scope and neighbors and The stance
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve Web application vulnerabilities
What it does
Security is an agent skill from telagod/code-abyss. Defensive security engineering judgment, distilled from a stronger model - invoke when THREAT MODELING a system or feature; making security-relevant design decisions (auth, crypto, trust boundaries, attack surface); reviewing code for vulnerabilities (injection, IDOR, secrets, the OWASP classes); hardening operations (secrets management, detection, patching, incident response); or judging whether a security control/program is real or theater. Also invoke BEFORE any offensive-flavored request (pentest, exploit…
Its SKILL.md is about 910 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files (for example `agentic.md`, `design.md` and `operate.md`).
It sits in Security, covering Threat modeling, Web application vulnerabilities and Penetration testing. It works with Model Context Protocol. The repository describes itself as: Give your AI coding agent a personality. Composable persona + style + skills for Claude Code, Codex, Gemini CLI & OpenClaw. Ships Tech Persona Card v1.0 spec. The licence is MIT.
When your agent uses it
- Tasks that involve Threat modeling
- Tasks that involve Web application vulnerabilities
- Tasks that involve Penetration testing
Example prompts
- “/security”
What it can do on your machine
Read from SKILL.md and the folder at commit 2544577. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
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.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Security loads about 907 tokens when it runs. Until then it costs about 190 tokens; SKILL.md has 376 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.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated 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.
SKILL.md
The full file from telagod/code-abyss at commit 2544577, republished under its MIT licence (© telagod). 376 words, ~907 tokens.
Download SKILL.mdSave it as
.claude/skills/security/SKILL.md (or your agent's skills folder). This skill also uses 7 other files; get the full folder from GitHub.- name
- security
- description
- Defensive security engineering judgment, distilled from a stronger model - invoke when THREAT MODELING a system or feature; making security-relevant design decisions (auth, crypto, trust boundaries, attack surface); reviewing code for vulnerabilities (injection, IDOR, secrets, the OWASP classes); hardening operations (secrets management, detection, patching, incident response); or judging whether a security control/program is real or theater. Also invoke BEFORE any offensive-flavored request (pentest, exploit, credential testing) to apply the authorization gate. Also invoke when designing, reviewing, or hardening an LLM/agent system that reads untrusted content or holds tool/MCP access (prompt injection, excessive agency, MCP supply chain).
- user-invocable
- false
Security — scope gate, threat model, design, review, operations, traps, agentic AI
Rule content lives in the seven files below; this SKILL.md only routes
(doctrine/04-maintenance.md governs edits to this bundle too).
First, always: scope.md §1 — the authorization gate. It fires on ANY request
mentioning exploits, payloads, bypassing auth/WAF/filters, cracking, brute force,
credential/password testing, scanning a target, or accessing a system the requester
didn't build in this session — recognize the moment even when the ask is phrased as
"just write a script." Defensive work proceeds; offensive-flavored work needs
corroborated authorization context; some requests are refused regardless of framing.
Pass the gate before applying anything else in this bundle.
Route by moment
| You are about to… | Read (in this folder) |
|---|---|
| Judge scope — fires on ANY mention of exploits, payloads, bypassing auth/WAF, cracking, brute force, credential testing, scanning a target, or reaching a system the requester didn't build here | scope.md §1 |
| Decide what to protect, from whom, and where to spend | threat-model.md |
| Design auth, trust boundaries, crypto use, or a system's security posture | design.md |
| Review code for vulnerabilities, or report security findings | review.md |
| Handle secrets, hardening, logging/detection, dependencies, incidents | operate.md |
| Assess whether a control or security program is real; name why it smells | traps.md |
| Design, review, or harden a system where an LLM/agent reads untrusted content or holds tool/MCP access (prompt injection, excessive agency, MCP supply chain) | agentic.md |
A new system usually runs threat-model.md (four questions) → design.md →
review.md before ship → operate.md in production.
Show full SKILL.md (137 more words)Show less
Scope and neighbors
Security judgment for building and defending systems. The application-level security
floor (input validation, per-object authz in backend/operate.md §5; rate limits in
backend/operate.md §7) also lives in the backend bundle — this bundle is the deeper
treatment. Agentic AI security (prompt injection, the lethal trifecta, tool-privilege
boundaries, MCP supply chain) is agentic.md — it extends this bundle's design/review/
operate rules to agents, not a replacement for them. General verification
discipline is methods/verify.md; whether to delegate → doctrine.
The stance
Attackers take the cheapest path; defenders must be honest about which door is open.
Threat model before controls (threat-model.md), assume breach (scope.md §3), make
the safe way the easy way (design.md §3) — and never confuse a control that exists
with a control that works (traps.md meta-signal). A clean review means "nothing found
where I looked," never "secure" (scope.md §5).
© telagod, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 7 other files in skills/_kernel/security of telagod/code-abyss.
- SKILL.md
- agentic.md
- design.md
- operate.md
- review.md
- scope.md
- threat-model.md
- traps.md
Open the folder on GitHubat commit 2544577
Compare with similar skills
Security 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 |
|---|---|---|---|---|---|---|
| Security this skilltelagod/code-abyss | 244 | — | ~907 | Automated safety check: Pass | MIT | |
| Securing AI Systemstrilwu/secskills | 156 | — | ~2.9k | Automated safety check: Pass | MIT | |
| Moai Ref Secopsmodu-ai/moai-adk | 1.2k | — | ~2.6k | Automated safety check: Pass | Apache-2.0 | |
| Csono-session/pstack | 131 | — | ~12k | Automated safety check: Notes | MIT | |
| Moai Ref LLM Securitymodu-ai/moai-adk | 1.2k | — | ~4.5k | Automated safety check: Pass | Apache-2.0 | |
| Skill InspectorNVIDIA/SkillSpector | 20k | — | ~1.8k | Automated safety check: Pass | Apache-2.0 |
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Related
Works with
Categories
Questions about Security
What does Security do?
Defensive security engineering judgment, distilled from a stronger model - invoke when THREAT MODELING a system or feature; making security-relevant design decisions (auth, crypto, trust boundaries…. Security is an agent skill from telagod/code-abyss. Defensive security engineering judgment, distilled from a stronger model - invoke when THREAT MODELING a system or feature; making security-relevant design decisions (auth, crypto, trust boundaries, attack surface); reviewing code for vulnerabilities (injection, IDOR, secrets, the OWASP classes); hardening operations (secrets management, detection, patching, incident response); or judging whether a security control/program is real or theater.
When should I use Security?
Security fits situations like: tasks that involve Threat modeling; tasks that involve Web application vulnerabilities; tasks that involve Penetration testing.
How do I install Security in Claude Code?
Run `npx skills add telagod/code-abyss --skill security -a claude-code`. Or copy the skill folder (skills/_kernel/security in telagod/code-abyss) into .claude/skills/security in your project. Claude Code loads it when a task matches its description.
How do I install Security in Codex?
Run `npx skills add telagod/code-abyss --skill security -a codex`. Or copy the skill folder (skills/_kernel/security in telagod/code-abyss) into .agents/skills/security in your project. Codex loads it when a task matches its description.
Can I use Security in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add telagod/code-abyss --skill security -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/security, .gemini/skills/security, .github/skills/security and .opencode/skills/security in your project.
What does Security need to run?
SKILL.md names no scripts, command-line tools or credentials: Security is instructions for the agent only.
Does Security access the network?
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.
Is Security safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Security use?
Security is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Security use?
About 907 tokens (SKILL.md is roughly 3.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Security?
Skills that share tags, products or a category with Security: Securing AI Systems (trilwu/secskills, 156 stars), Moai Ref Secops (modu-ai/moai-adk, 1.2k stars), Cso (no-session/pstack, 131 stars) and Moai Ref LLM Security (modu-ai/moai-adk, 1.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Security?
telagod (a GitHub user) maintains it in telagod/code-abyss, which has 244 GitHub stars. The repository holds 38 skills in this directory. The repository was last updated on July 19, 2026.
Source: telagod/code-abyss on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.