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 agentmods add skills/telagod/code-abyss/securitynpx skills add telagod/code-abyss --skill securitygit clone --depth 1 https://github.com/telagod/code-abyssWhat 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 | $0.00149 | $0.00827 |
| Opus 5 | $0.00075 | $0.00413 |
| Sonnet 5 | $0.00030 | $0.00165 |
| Haiku 4.5 | $0.00015 | $0.00083 |
Grade A, and why
security scanned grade A with 0 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 2d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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.
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.
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2d ago First seen · 52 lines · 149 tokens per session scan A fcc4da50783c
security is a skill published in the GitHub repository telagod/code-abyss (240 stars, last pushed 1mo ago), licensed MIT. It adds 149 tokens to every session and 827 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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