iterabledata-development

iterabledata-development is a skill for Claude Code, Codex, Cursor from datenoio/iterabledata. It costs 33 tokens per session (695 once invoked), scanned A, original, MIT.

A set of development conventions for IterableData, a Python library for reading, writing, converting, and processing data files.

In plain words
What is it for?
Use it when adding features, fixing bugs, navigating the codebase, running tests, or checking Python code with the project’s tools.
Why use it?
It provides the project’s setup commands, code style, folder structure, import patterns, and testing and formatting rules.

Skill for Claude CodeCodexCursor

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/datenoio/iterabledata/iterabledata-development
Any agent
npx skills add datenoio/iterabledata --skill iterabledata-development
Clone the repo
git clone --depth 1 https://github.com/datenoio/iterabledata

Made for: Claude Code, Codex, Cursor.

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 iterabledata-development

README.md
[![agentmods](https://agentmods.dev/badge/skills/datenoio/iterabledata/iterabledata-development.svg)](https://agentmods.dev/skills/datenoio/iterabledata/iterabledata-development)
Your own site
<a href="https://agentmods.dev/skills/datenoio/iterabledata/iterabledata-development"><img src="https://agentmods.dev/badge/skills/datenoio/iterabledata/iterabledata-development.svg" alt="Measured on agentmods" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 695 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 $0.00033 $0.00695
Opus 5 $0.00016 $0.00347
Sonnet 5 $0.00007 $0.00139
Haiku 4.5 $0.00003 $0.00069

Measured 5d ago against content hash bbbc57ad7359, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

iterabledata-development 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.

.cursor/skills/iterabledata-development/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

IterableData Development

Quick Setup

pip install -e ".[dev]"
pytest --verbose
ruff check iterable tests
ruff format iterable tests

Code Style

  • Python 3.10+ with type hints where appropriate
  • Max line length: 120 characters
  • Use ruff for linting and formatting
  • Double quotes for strings consistently
  • Always use context managers for file operations
  • Import order: standard library, third-party, local imports

Project Structure

  • iterable/helpers/ - Utility functions (detect, schema, utils)
  • iterable/datatypes/ - Format-specific implementations
  • iterable/codecs/ - Compression codec implementations
  • iterable/engines/ - Processing engines (DuckDB, internal)
  • iterable/convert/ - Format conversion utilities
  • iterable/pipeline/ - Data pipeline processing
  • tests/ - Test suite (one test file per format/feature)

Import Patterns

  • Main entry: from iterable import open_iterable
  • Convert: from iterable.convert import convert
  • Format-specific (advanced): from iterable.datatypes.csv import CSVIterable
  • Codecs (advanced): from iterable.codecs.gzipcodec import GZIPCodec
  • Always use open_iterable() for user-facing examples; do not teach iterable.helpers.detect as the default import

File Handling

  • Always use context managers: with open_iterable('file.csv') as source:
  • Never call .close() when using with statements
  • Reset iterators with .reset() method when needed
  • Handle compression automatically via filename detection

Error Handling

  • Format detection failures: provide helpful error messages
  • Missing optional dependencies: raise clear ImportError with installation instructions
  • Invalid file formats: raise appropriate exceptions (ValueError, TypeError)
  • Always handle file I/O errors gracefully

Code Conventions

  • Use open_iterable() for automatic format detection
  • Prefer bulk operations (read_bulk, write_bulk) for performance
  • Use DuckDB engine when appropriate (CSV, JSONL files)
  • Handle encoding automatically via chardet or user specification

Read the full file on GitHub · 86 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. 5d ago First seen · 86 lines · 33 tokens per session scan A bbbc57ad7359

Subscribe to this mod's changes

iterabledata-development is a skill published in the GitHub repository datenoio/iterabledata (37 stars, last pushed 16d ago), licensed MIT. It adds 33 tokens to every session and 695 once invoked, about $0.0002 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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