Pragmatic Functional Programming

Pragmatic Functional Programming is a skill for Claude Code, Codex from whatiskadudoing/fp-ts-skills. It costs 29 tokens per session (3,966 once invoked), scanned A, original, no licence file.

A practical introduction to functional programming, a way of writing code around predictable functions and data transformations. It focuses on useful techniques without academic terminology.

In plain words
What is it for?
Use it as a starting point when adopting functional programming in TypeScript or deciding which techniques are worth using.
Why use it?
It helps developers learn the parts of functional programming that are useful in everyday development without taking on the whole theory at once.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it as a starting point when adopting functional programming in TypeScript or deciding which techniques are worth using.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/whatiskadudoing/fp-ts-skills/fp-pragmatic
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.

Any agent
npx skills add whatiskadudoing/fp-ts-skills --skill fp-pragmatic
Clone the repo
git clone --depth 1 https://github.com/whatiskadudoing/fp-ts-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 Pragmatic Functional Programming

README.md
[![agentmods](https://agentmods.dev/badge/skills/whatiskadudoing/fp-ts-skills/fp-pragmatic/github.svg)](https://agentmods.dev/skills/whatiskadudoing/fp-ts-skills/fp-pragmatic)
Your own site
<a href="https://agentmods.dev/skills/whatiskadudoing/fp-ts-skills/fp-pragmatic"><img src="https://agentmods.dev/badge/skills/whatiskadudoing/fp-ts-skills/fp-pragmatic/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.

agentmods 80×15 button for Pragmatic Functional Programming

Your own site · 80×15
<a href="https://agentmods.dev/skills/whatiskadudoing/fp-ts-skills/fp-pragmatic"><img src="https://agentmods.dev/badge/skills/whatiskadudoing/fp-ts-skills/fp-pragmatic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,966 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00029 $0.03966
Opus 5 $0.00015 $0.01983
Sonnet 5 $0.00006 $0.00793
Haiku 4.5 $0.00003 $0.00397

Measured 11d ago against content hash 6263238c7eb8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

Pragmatic Functional Programming 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 11d 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.

skills/fp-pragmatic/SKILL.md · 599 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. 11d ago First seen · 599 lines · 29 tokens per session scan A 6263238c7eb8

Subscribe to this mod's changes

Pragmatic Functional Programming is a skill published in the GitHub repository whatiskadudoing/fp-ts-skills (11 stars, last pushed 7mo ago), with no licence file. It adds 29 tokens to every session and 3,966 once invoked, about $0.0001 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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