agentic-security:secure-coding-guard

A security check that runs before code is written for risky operations such as eval, shell execution, database queries, cryptography, and authentication.

In plain words
What is it for?
Use it when adding code that executes strings or commands, builds SQL by joining strings, uses older cryptographic algorithms, or handles JWT, OAuth, or cipher logic.
Why use it?
It helps catch common unsafe coding patterns before they become part of the codebase.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/clear-capabilities/agentic-security/secure-coding-guard
Any agent
npx skills add Clear-Capabilities/agentic-security --skill secure-coding-guard
Clone the repo
git clone --depth 1 https://github.com/Clear-Capabilities/agentic-security

Made for: Claude Code, Codex.

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,317 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00045 $0.04317
Opus 5 $0.00023 $0.02159
Sonnet 5 $0.00009 $0.00863
Haiku 4.5 $0.00005 $0.00432

Measured 2d ago against content hash a01248cd3ba9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agentic-security:secure-coding-guard 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 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **External API**: `fetch(<url-from-input>)`, `axios.get(<url>)`,

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- **Shell-from-JS**: `exec(userString)`, `execSync(userString)`,
skills/secure-coding-guard/SKILL.md · 371 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

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.

  1. 2d ago First seen · 371 lines · 45 tokens per session scan A a01248cd3ba9

Subscribe to this mod's changes

agentic-security:secure-coding-guard is a skill published in the GitHub repository Clear-Capabilities/agentic-security (87 stars, last pushed 3d ago), with no licence file. It adds 45 tokens to every session and 4,317 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 2 findings (makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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