agentmods.dev

effect-patterns

A Claude Code plugin for finding and generating Effect-TS code patterns. Effect-TS is a TypeScript library for handling errors, asynchronous operations, and other program behavior in a structured way.

In plain words
What is it for?
Use it when searching for or creating Effect-TS implementations. It requires an API key.
Why use it?
It provides a way to look up example patterns and generate related code while developing with Effect-TS.

Plugin for Claude Code

794 2mo ago A scan tokens not measured original MIT
View the source file PaulJPhilp/EffectPatterns
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 plugins/pauljphilp/effectpatterns/marketplace
Claude Code
/plugin marketplace add PaulJPhilp/EffectPatterns
Clone the repo
git clone --depth 1 https://github.com/PaulJPhilp/EffectPatterns

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

effect-patterns 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.

config/.claude-plugin/marketplace.json · 21 lines

What it actually says

{
  "name": "effect-patterns",
  "version": "0.1.0",
  "description": "Effect Patterns plugin for Claude Code - search and generate Effect-TS code patterns",
  "author": "Paul J Philp",
  "homepage": "https://github.com/PaulJPhilp/EffectPatterns",
  "repository": "https://github.com/PaulJPhilp/EffectPatterns",
  "license": "MIT",
  "keywords": [
    "effect",
    "effect-ts",
    "typescript",
    "patterns",
    "code-generation"
  ],
  "category": "development",
  "apiEndpoint": "https://effect-patterns-mcp.vercel.app",
  "requiresAuth": true,
  "authType": "api-key"
}
Files

What ships with it

30 files beside marketplace.json 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.

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 First seen · 21 lines scan A 3e0272f2ded7

Subscribe to this mod's changes

effect-patterns is a plugin published in the GitHub repository PaulJPhilp/EffectPatterns (794 stars, last pushed 2mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.

Backend and APIsMemory and contextResearchdesign-patternseffecteffect-tsfunctional-programmingknowledge-basepatterns
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