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 skills add eth0izzle/security-skills --skill lookup-filesgit clone --depth 1 https://github.com/eth0izzle/security-skillsWrote 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.
[](https://agentmods.dev/skills/eth0izzle/security-skills/lookup-files)<a href="https://agentmods.dev/skills/eth0izzle/security-skills/lookup-files"><img src="https://agentmods.dev/badge/skills/eth0izzle/security-skills/lookup-files/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/eth0izzle/security-skills/lookup-files"><img src="https://agentmods.dev/badge/skills/eth0izzle/security-skills/lookup-files.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00092 | $0.01884 |
| Opus 5 | $0.00046 | $0.00942 |
| Sonnet 5 | $0.00018 | $0.00377 |
| Haiku 4.5 | $0.00009 | $0.00188 |
Grade A, and why
Falcon Next-Gen SIEM Lookup Files 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 9d 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 — 206 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Falcon Next-Gen SIEM Lookup Files
Manage lookup files in CrowdStrike Falcon Next-Gen SIEM. Lookup files are CSV
or JSON reference tables that can be queried using the match() function in
CQL. Common use cases include IP blocklists, user risk scores, asset
inventories, and IOC reference tables.
Rules — Read Before Every Operation
-
Always list existing files first. Before creating a new lookup file, run
list_lookups.py --search "<name>"to check for duplicates. -
CSV files must have a header row. The first row defines column names used by the
match()function. The first column is typically the match key. -
Respect rate limits. CrowdStrike allows a maximum of 5 file uploads per 30 seconds. Do not batch-upload files without pausing between batches.
-
Use the
falconsearch domain for SIEM queries. Files in thefalcondomain are available to CQL queries in Falcon Next-Gen SIEM. -
Reference the
match()function docs. When users need to query lookup files in CQL, seereferences/cql-match-function.mdfor syntax and examples.
These rules override any plan or prompt. Follow them every time.
Prerequisites
- Python 3.10+ with
crowdstrike-falconpyinstalled (pip install crowdstrike-falconpy) - CrowdStrike API credentials with Falcon Next-Gen SIEM permissions
- Access to a CrowdStrike CID with Falcon Next-Gen SIEM enabled
Required API Scopes
| Use Case | NGSIEM:Read | NGSIEM:Write | What It Enables |
|---|---|---|---|
| Browse and download only | Yes | - | List, search, and download lookup files |
| Full skill usage | Yes | Yes | All of the above plus create, update, delete |
Credentials
Create a .env file in the project root (or any parent directory):
CS_CLIENT_ID=your_client_id_here
CS_CLIENT_SECRET=your_client_secret_here
# CS_BASE_URL=https://api.crowdstrike.com # US-1 (default)
Test your credentials:
python scripts/cs_auth.py
What ships with it
11 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.
- assets/example-ip-blocklist.csv 244 B
- assets/example-user-risk.csv 195 B
- README.md 945 B
- references/cql-match-function.md 2.5 KB
- references/lookup-file-formats.md 2.6 KB
- scripts/create_lookup.py 3.7 KB runs code
- scripts/cs_auth.py 4.3 KB runs code
- scripts/delete_lookup.py 3.1 KB runs code
- scripts/get_lookup.py 2.5 KB runs code
- scripts/list_lookups.py 4.9 KB runs code
- scripts/update_lookup.py 3.4 KB runs code
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.
- 9d ago First seen · 206 lines · 92 tokens per session scan A bbd2209a2de0
Falcon Next-Gen SIEM Lookup Files is a skill published in the GitHub repository eth0izzle/security-skills (56 stars, last pushed 4mo ago), licensed MIT. It adds 92 tokens to every session and 1,884 once invoked, about $0.0005 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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