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.
npx skills add pproenca/dot-skills --skill effect-tsgit clone --depth 1 https://github.com/pproenca/dot-skillsWrote 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.
[](https://agentmods.dev/skills/pproenca/dot-skills/effect-ts)<a href="https://agentmods.dev/skills/pproenca/dot-skills/effect-ts"><img src="https://agentmods.dev/badge/skills/pproenca/dot-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.
<a href="https://agentmods.dev/skills/pproenca/dot-skills/effect-ts"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/effect-ts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00206 | $0.01796 |
| Opus 5 | $0.00103 | $0.00898 |
| Sonnet 5 | $0.00041 | $0.00359 |
| Haiku 4.5 | $0.00021 | $0.00180 |
Grade A, and why
effect-ts scanned grade A with 1 finding 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 6d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const async = Effect.tryPromise(() => fetch(url)) How it starts
The opening of the file, as written. The whole thing — 209 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Effect TypeScript Best Practices
Effect is a TypeScript library for building complex, type-safe applications with structured error handling, dependency injection via services/layers, fiber-based concurrency, and resource safety.
When to Apply
- Writing or reviewing TypeScript code that imports from
effect,@effect/schema, or@effect/platform - Implementing typed error handling with
Effect<Success, Error, Requirements> - Building services and layers for dependency injection
- Working with Schema for data validation, decoding, and transformation
- Using fiber-based concurrency (queues, semaphores, PubSub, deferred)
- Processing data with Stream and Sink
- Migrating from Promises, fp-ts, neverthrow, or ZIO to Effect
How to Use
This skill is organized by domain. Read the relevant reference file for the area you're working in.
Read First: The Paradigm
Always read this before diving into API references, especially when refactoring existing code to use Effect or writing new Effect services:
| Reference | When to Read |
|---|---|
| Think in Effect: The Paradigm Shift | Before any other reference. Mental model shifts, refactoring recipes, anti-patterns, application architecture. Read this to understand HOW to think in Effect — the other files teach WHAT to type. |
Core Foundations
| Reference | When to Read |
|---|---|
| Getting Started | Creating the Effect type, pipelines, generators, running effects |
| Error Management | Typed errors, recovery, retrying, timeouts, sandboxing |
| Core Concepts | Request batching, configuration management, runtime system |
Data & Validation
| Reference | When to Read |
|---|---|
| Data Types | Option, Either, Cause, Chunk, DateTime, Duration, Exit, Data |
| Schema Basics | Schema intro, basic usage, classes, constructors, effect data types |
| Schema Advanced | Transformations, filters, annotations, error formatting, JSON Schema output |
What ships with it
23 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.
- gotchas.md 1.8 KB
- metadata.json 631 B
- references/_sections.md 3.1 KB
- references/ai-integration.md 35 KB
- references/code-style.md 60 KB
- references/conc-concurrency.md 80 KB
- references/core-concepts.md 73 KB
- references/data-types.md 122 KB
- references/error-management.md 94 KB
- references/getting-paradigm.md 21 KB
- references/getting-started.md 117 KB
- references/micro-module.md 70 KB
- references/migration-guides.md 67 KB
- references/obs-observability.md 79 KB
- references/plat-platform.md 37 KB
- references/req-management.md 65 KB
- references/resource-management.md 46 KB
- references/sched-scheduling.md 41 KB
- references/schema-advanced.md 192 KB
- references/schema-basics.md 188 KB
- references/state-management.md 18 KB
- references/streams-and-sinks.md 109 KB
- references/test-testing.md 6.1 KB
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.
- 6d ago First seen · 209 lines · 206 tokens per session scan A cea7a54072da
effect-ts is a skill published in the GitHub repository pproenca/dot-skills (205 stars, last pushed 24d ago), licensed MIT. It adds 206 tokens to every session and 1,796 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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