What is icelandic-data AGENTS.md?

Repository instructions for an Icelandic public-data toolkit. Each skill documents one data source, while scripts fetch, clean, and transform the data into usable files and reports.

Use them when adding or maintaining an Icelandic data source, documenting APIs and data quirks, running health checks, processing downloads, or creating HTML reports.

They give agents and contributors a consistent place for source details, processing code, tests, and shared instructions across Claude Code and Codex.

How jokull/icelandic-data configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to jokull/icelandic-data. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/jokull/icelandic-data/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/jokull/icelandic-data

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/jokull/icelandic-data/agents-md/github.svg)](https://agentmods.dev/instructions/jokull/icelandic-data/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/jokull/icelandic-data/agents-md"><img src="https://agentmods.dev/badge/instructions/jokull/icelandic-data/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/jokull/icelandic-data/agents-md"><img src="https://agentmods.dev/badge/instructions/jokull/icelandic-data/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 8,413 This file is loaded in full into every session.

When invoked 8,413 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.08413	$0.08413
Opus 5.5	$0.03365	$0.03365
Sonnet 5.5	$0.01683	$0.01683
Haiku 4.5	$0.00841	$0.00841

Measured 5d ago against content hash e2358651be54, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

icelandic-data AGENTS.md 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 5d 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.

AGENTS.md · 597 lines

How it starts

The opening of the file, as written. The whole thing — 597 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Icelandic Data Toolkit

Data toolkit for Icelandic public data. Each skill in .agents/skills/ documents one data source — API endpoints, series codes, encoding quirks, classification changes. Scripts in scripts/ fetch, clean, and transform the data.

Architecture

/.agents/skills/{source}/SKILL.md   # Data source docs (API, endpoints, caveats)
/scripts/{source}.py                # Fetch + transform scripts (uv project)
/tests/health/test_{source}.py      # Upstream health probe (marker: health)
/data/
  /raw/{source}/                    # Raw downloads (Excel, CSV, JSON)
  /processed/                       # Cleaned datasets

Skills follow the agentskills.io open standard, so the same SKILL.md files work in both Claude Code and Codex:

.agents/skills/ is the real location — read natively by Codex.
.claude/skills is a symlink to it, so Claude Code discovers the same files.
CLAUDE.md is a symlink to AGENTS.md, so both agents read these instructions.

Skill names must be lowercase, ASCII, hyphen-separated (no underscores, no ð/æ).

Skills

Each skill documents ONE data source:

API endpoints and authentication
Available series and their scope
Tariff codes, variable mappings, classification changes
Example fetch commands
Known caveats (encoding, date ranges, schema changes)

There is deliberately no index of skills here. Each SKILL.md carries a description in its frontmatter, and that description is what both agents preload and match against — a table in this file would be a second, staler copy that cannot trigger anything. Run ls .agents/skills/ to enumerate them.

Keep each description under ~160 characters: Codex truncates when all descriptions combined exceed 8,000 characters, and with 45 skills that budget is the binding constraint.

When asked about a new data source: follow the new-data-source skill.

Write-ups live elsewhere

This repo fetches and queries. Memos, plans and kept reports for Sósíalistaflokkur Íslands go to ~/Code/xj-accounts/research/ (copy any reports/*.html worth keeping there with a date prefix — reports/ here is git-ignored).

Read the full file on GitHub · 597 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.

5d ago Changed · +5 lines · +79 tokens per session e2358651be54
13d ago Changed · +1 lines · +57 tokens per session ad74fe3ec5ac
26d ago Changed · +6 lines · +70 tokens per session 931037945b92
1mo ago Changed · +5 lines · +138 tokens per session f69f5d6529ae
1mo ago Changed · +50 lines · +944 tokens per session 9d5863b751ee
2mo ago Changed · +10 lines · +180 tokens per session b03b1f3fa4e8
2mo ago First seen · 520 lines · 6,945 tokens per session scan A f5d48eef7a74

Subscribe to this mod's changes

icelandic-data AGENTS.md is an instructions file published in the GitHub repository jokull/icelandic-data (57 stars, last pushed yesterday), licensed MIT. It adds 8,413 tokens to every session, about $0.0337 per session on Opus 5.5. 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.

icelandic-data AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
icelandic-data AGENTS.mdjokull/icelandic-data	Instructions file	57	yesterday	MIT	A	8,413	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	1,907	GitHub Copilot

icelandic-data: Instructions file for Codex