5chan: Skill for Claude Code

.agents/skills/you-might-not-need-an-effect/SKILL.md

you-might-not-need-an-effect is a skill for Claude Code, Codex from bitsocialnet/5chan. It costs 54 tokens per session (1,094 once invoked), scanned A, original, GPL-3.0.

A code-review guide for finding unnecessary useEffect calls in React applications. useEffect is a React feature for running code in response to changes, but some updates can be handled more simply.

In plain words
What is it for?
Use it to inspect useEffect usage and refactor cases where a simpler alternative is appropriate.
Why use it?
It helps remove effect patterns that add needless complexity or cause avoidable updates.

Skill for Claude CodeCodex

Written for Claude Code and Codex: disable-model-invocation in frontmatter, but also agents/openai.yaml present. Also seen: installed under .agents/ (shared by several agents).

This is bitsocialnet/5chan's own configuration. It tells Claude Code and Codex how to work on 5chan itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything 5chan configures →

Reuse

Borrowing it

Nothing to install: this file belongs to bitsocialnet/5chan. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/bitsocialnet/5chan/master/.agents/skills/you-might-not-need-an-effect/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/bitsocialnet/5chan

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 you-might-not-need-an-effect

README.md
[![agentmods](https://agentmods.dev/badge/skills/bitsocialnet/5chan/you-might-not-need-an-effect/github.svg)](https://agentmods.dev/skills/bitsocialnet/5chan/you-might-not-need-an-effect)
Your own site
<a href="https://agentmods.dev/skills/bitsocialnet/5chan/you-might-not-need-an-effect"><img src="https://agentmods.dev/badge/skills/bitsocialnet/5chan/you-might-not-need-an-effect/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 you-might-not-need-an-effect

Your own site · 80×15
<a href="https://agentmods.dev/skills/bitsocialnet/5chan/you-might-not-need-an-effect"><img src="https://agentmods.dev/badge/skills/bitsocialnet/5chan/you-might-not-need-an-effect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,094 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 $0.00054 $0.01094
Opus 5 $0.00027 $0.00547
Sonnet 5 $0.00011 $0.00219
Haiku 4.5 $0.00005 $0.00109

Measured today against content hash ad89ccb9104b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

you-might-not-need-an-effect 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 today.

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.

.agents/skills/you-might-not-need-an-effect/SKILL.md · 148 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file 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. today Changed ad89ccb9104b
  2. 11d ago First seen · 148 lines · 54 tokens per session scan A 5a36853a3f50

Subscribe to this mod's changes

you-might-not-need-an-effect is a skill published in the GitHub repository bitsocialnet/5chan (132 stars, last pushed today), licensed GPL-3.0. It adds 54 tokens to every session and 1,094 once invoked, about $0.0003 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 2026-09-01.