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effect-ts

effect-ts is a skill for Claude Code, Codex from joelhooks/effectts-skills. It costs 150 tokens per session (2,745 once invoked), scanned A, original, no licence file.

A guide to writing Effect v4 TypeScript, using Effect's services, dependency injection, typed errors, and data-modeling patterns. Effect is a TypeScript library for structuring programs with explicit dependencies and errors.

In plain words
What is it for?
Use it when writing, reviewing, or refactoring Effect code involving services, layers, dependency injection, error handling, or schemas.
Why use it?
It helps keep Effect code consistent with the library's current recommended style instead of relying on guesswork or older patterns.

Skill for Claude CodeCodex

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

not rated 45repo 5mo ago A scan Socket: warnSnyk: pass 150 tokens no licence

Good fit Use it when writing, reviewing, or refactoring Effect code involving services, layers, dependency injection, error handling, or schemas.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/joelhooks/effectts-skills/effect-ts
View source ↗ joelhooks/effectts-skills
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 joelhooks/effectts-skills --skill effect-ts
Clone the repo
git clone --depth 1 https://github.com/joelhooks/effectts-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 effect-ts

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/joelhooks/effectts-skills/effect-ts"><img src="https://agentmods.dev/badge/skills/joelhooks/effectts-skills/effect-ts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 150 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,745 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. Third-party audits
  • Socket warn 15 Sept 2026
  • Snyk pass 15 Sept 2026
How audits are shown
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 $0.00150 $0.02745
Opus 5.5 $0.00060 $0.01098
Sonnet 5.5 $0.00030 $0.00549
Haiku 4.5 $0.00015 $0.00275

Measured 2mo ago against content hash 7b79b38c57e7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

effect-ts 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 2mo 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/effect-ts/SKILL.md · 296 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

Files

What ships with it

10 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.

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. 2mo ago First seen · 296 lines · 150 tokens per session scan A 7b79b38c57e7

Subscribe to this mod's changes

effect-ts is a skill published in the GitHub repository joelhooks/effectts-skills (45 stars, last pushed 5mo ago), with no licence file. It adds 150 tokens to every session and 2,745 once invoked, about $0.0006 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.

LanguagesTypeScript
Related

effect-ts compared with skills from other repositories

effect-ts next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
effect-tsjoelhooks/effectts-skillsSkill455mo agononeA150Claude Code, Codex
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fast-typescript-checkinternet-development/www-sacredSkill1.6k3d agoMITA84Claude Code, Codex
typescript-magicianmcollina/skillsSkill2.0k11d agoMITA108Claude Code, Codex