A guide for designing, refactoring, and reviewing EffectorJS applications, a JavaScript library for managing application state and data flows. It focuses on current version 23 or newer patterns, including server-side rendering and framework integrations.

Use it to model stores, events, and effects; refactor state flows; implement or debug server-side rendering; migrate older Effector code; and review code for common design problems.

It helps replace tangled state logic with clearer event and data-flow models, while reducing scope and server-rendering errors. It also provides focused guidance for React, Solid, and Vue integrations.

effectorjs — Skill for Codex by aiko-atami/effectorjs-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 aiko-atami/effectorjs-skills --skill effectorjs

Clone the repo

git clone --depth 1 https://github.com/aiko-atami/effectorjs-skills

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/aiko-atami/effectorjs-skills/effectorjs/github.svg)](https://agentmods.dev/skills/aiko-atami/effectorjs-skills/effectorjs)

Your own site

<a href="https://agentmods.dev/skills/aiko-atami/effectorjs-skills/effectorjs"><img src="https://agentmods.dev/badge/skills/aiko-atami/effectorjs-skills/effectorjs/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/aiko-atami/effectorjs-skills/effectorjs"><img src="https://agentmods.dev/badge/skills/aiko-atami/effectorjs-skills/effectorjs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 97 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,164 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 original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00097	$0.01164
Opus 5.5	$0.00039	$0.00466
Sonnet 5.5	$0.00019	$0.00233
Haiku 4.5	$0.00010	$0.00116

Measured 2mo ago against content hash 7b26838f4cca, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

effectorjs 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/effectorjs/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

EffectorJS Skill

Use this skill to produce deterministic, scope-safe Effector solutions for new features, refactors, and code reviews.

Workflow

Classify the request:

modeling: create or extend stores/events/effects.
refactor: replace anti-patterns with declarative flows.
ssr: implement or debug scope-safe SSR.
review: assess risks, regressions, and missing tests.
legacy-migration: move old patterns to modern v23+ safely.

Load only required references:

Always start with references/core-patterns.md.
Always load references/lint-derived-best-practices.md after core patterns to enforce plugin-backed best practices.
Add references/explicit-start.md when task touches app bootstrap, startup logic, initialization order, tests, scope, or SSR.
Add references/computation-priority.md when task touches ordering, watch, sequencing, race-like behavior, or side effects placement.
Add references/react-ssr-scope.md when React/SSR/scope appears.
Add references/solid-scope.md when Solid integration appears.
Add references/vue-scope.md when Vue integration appears.
Add references/anti-patterns-and-fixes.md when fixing or reviewing existing logic.
Add references/legacy-migration-map.md when deprecated APIs/imports are present.
End with references/checklists.md for acceptance criteria.

Build solution in this order:

Model atomic stores and explicit events.
Define explicit app start (appStarted) and keep startup wiring declarative.
Move side effects to effects.
Connect units with sample first; use attach for effect composition.
Apply scope-first rules (fork, allSettled) for tests, SPA bootstrap boundaries, and SSR.
For UI frameworks, use useUnit and correct provider wiring.

Produce output contract:

Proposed model topology (stores/events/effects and responsibilities).
Wiring snippets (sample, attach, split if needed).
Scope/SSR notes when applicable.
Lint-derived conformance notes for naming/dataflow/scope/react constraints.
Test scenarios and acceptance checklist.

Read the full file on GitHub · 90 lines

Files

What ships with it

12 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.

2mo ago First seen · 90 lines · 97 tokens per session scan A 7b26838f4cca

Subscribe to this mod's changes

effectorjs is a skill published in the GitHub repository aiko-atami/effectorjs-skills (2 stars, last pushed 8mo ago), licensed MIT. It adds 97 tokens to every session and 1,164 once invoked, about $0.0004 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 2026-08-31.

Frontend skill

effectorjs next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
effectorjsaiko-atami/effectorjs-skills	Skill	2	8mo ago	MIT	A	97	Codex
patent-maphandsomestWei/patent-disclosure-skill	Skill	13k	2d ago	MIT	A	48	Claude Code
autoreviewopenclaw/clawhub	Skill	9.5k	yesterday	MIT	A	17	Claude Code, Codex
sandbaseiflytek/skillhub	Skill	5.4k	yesterday	Apache-2.0	A	67	Claude Code
convex-insightsopenclaw/clawhub	Skill	9.5k	yesterday	MIT	A	45	Claude Code, Codex
openclaw-design-systemopenclaw/clawhub	Skill	9.5k	yesterday	MIT	A	37	Claude Code, Codex
convex-addopenclaw/clawhub	Skill	9.5k	yesterday	MIT	A	81	Claude Code, Codex