security

security is a skill for Claude Code, Codex from cognitedata/builder-skills. It costs 119 tokens per session (2,860 once invoked), scanned A, original, Apache-2.0.

A security guide for finding and fixing security problems in a Flows app before shipping. It examines authentication, external data, user input, credentials, and network access.

In plain words
What is it for?
Use it for security fixes or hardening features that handle credentials, user input, or external data. It also checks that Cognite Data Fusion requests use the official Cognite SDK.
Why use it?
It helps identify unsafe data flows and ensures that issues found during the review are fixed rather than only reported.

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/cognitedata/builder-skills/security
Any agent
npx skills add cognitedata/builder-skills --skill security
Clone the repo
git clone --depth 1 https://github.com/cognitedata/builder-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for security

README.md
[![agentmods](https://agentmods.dev/badge/skills/cognitedata/builder-skills/security.svg)](https://agentmods.dev/skills/cognitedata/builder-skills/security)
Your own site
<a href="https://agentmods.dev/skills/cognitedata/builder-skills/security"><img src="https://agentmods.dev/badge/skills/cognitedata/builder-skills/security.svg" alt="Measured on agentmods" height="20"></a>
Per session 119 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,860 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00119 $0.02860
Opus 5 $0.00060 $0.01430
Sonnet 5 $0.00024 $0.00572
Haiku 4.5 $0.00012 $0.00286

Measured yesterday against content hash 735a0242d149, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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 yesterday.

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.

skills/security/SKILL.md · 250 lines

How it starts

The opening of the file, as written. The whole thing — 250 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Security Fix

Find and fix security issues in $ARGUMENTS (or the whole app if no argument is given). Work through every step below in order. Every step that finds an issue must also fix it.


Step 1 — Map the attack surface

Read these files before checking anything:

  • src/main.tsx / src/App.tsx — entry point, routing, auth gating
  • vite.config.ts — dev server proxy, CORS, headers
  • package.json — list of third-party dependencies
  • Any file matching **/auth*, **/login*, **/token*, **/credential*

Identify:

  • All pages/routes and whether each is behind an auth guard
  • All places where external data enters the app (CDF SDK calls, fetch, user form input)
  • All places where data is written back (CDF upsert, fetch POST/PUT/DELETE)

Step 2 — Migrate all CDF access to the Cognite SDK

All traffic to Cognite Data Fusion (CDF) must go through the official Cognite SDK. Find any HTTP, WebSocket, or other network call to CDF-like hosts or APIs that bypasses the SDK and rewrite it to use the SDK.

Search for raw HTTP calls

# Find fetch, axios, XMLHttpRequest, and other HTTP client usage
grep -rn --include="*.ts" --include="*.tsx" --include="*.js" \
  -E "(fetch\(|axios\.|axios\(|XMLHttpRequest|\.ajax\(|http\.get\(|http\.post\(|request\()" src/

# Find raw URL construction that looks like CDF endpoints
grep -rn --include="*.ts" --include="*.tsx" \
  -E "(cognitedata\.com|cognite\.ai|/api/v1/projects|cdf\.|\.cognite\.)" src/

# Find custom Authorization or api-key headers
grep -rn --include="*.ts" --include="*.tsx" \
  -E "(Authorization|api-key|apikey|x-api-key)" src/ | grep -v "node_modules"

How to fix

For each raw CDF call found, read the surrounding code to understand what CDF resource and operation it targets, then rewrite it using the appropriate SDK method. Remove the raw HTTP client import if it's no longer used.

Pattern Action
fetch() or axios call to a CDF URL (*.cognitedata.com, /api/v1/projects/*) Rewrite to use the Cognite SDK (cognite.files.getDownloadUrls(...), cognite.timeseries.retrieve(...), client.instances.search(...), etc.)
Custom Authorization header with a CDF token Remove — the SDK handles auth automatically
WebSocket connection to CDF endpoints Rewrite to use SDK streaming methods
Proxy endpoint that forwards to CDF internally Rewrite the proxy to use the SDK internally
fetch() to a non-CDF URL (static assets, documented third-party API) Leave — but add a comment documenting why it's needed

Read the full file on GitHub · 250 lines

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. yesterday Changed · +1 lines 735a0242d149
  2. 5d ago First seen · 249 lines · 119 tokens per session scan A c7c4cc9ce010

Subscribe to this mod's changes

security is a skill published in the GitHub repository cognitedata/builder-skills (6 stars, last pushed today), licensed Apache-2.0. It adds 119 tokens to every session and 2,860 once invoked, about $0.0006 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 2026-08-31.

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