Agent skill

Wrdn Effect Atom Reactivity Keys

by UsefulSoftwareCo in UsefulSoftwareCo/executor

Add reactivityKeys to effect-atom write mutation calls. An agent skill from UsefulSoftwareCo/executor.

MITAuto-check: notes

Install Wrdn Effect Atom Reactivity Keys

skills CLI
$ npx skills add UsefulSoftwareCo/executor --skill wrdn-effect-atom-reactivity-keys -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install UsefulSoftwareCo/executor wrdn-effect-atom-reactivity-keys --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/UsefulSoftwareCo/executor.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/wrdn-effect-atom-reactivity-keys .claude/skills/wrdn-effect-atom-reactivity-keys && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
wrdn-effect-atom-reactivity-keys
GitHub stars
4.1k
Token cost
~204 tokens
SKILL.md length
61 words
Files
1
Skills in repo
21
Repo updated
First seen
Licence
MIT

At a glance

Add reactivityKeys to effect-atom write mutation calls. An agent skill from UsefulSoftwareCo/executor.

  • Lint flags a useAtomSet mutation call that mutates data without invalidation keys
  • SKILL.md covers Fix Shape and Good
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Wrdn Effect Atom Reactivity Keys is an agent skill from UsefulSoftwareCo/executor. Add reactivityKeys to effect-atom write mutation calls. Use when lint flags a useAtomSet mutation call that mutates data without invalidation keys.

Its SKILL.md is about 200 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: The missing integration layer for AI agents. Let them call any OpenAPI / MCP / GraphQL / custom js functions in secure environment. The licence is MIT.

When your agent uses it

  • Lint flags a useAtomSet mutation call that mutates data without invalidation keys

Example prompts

  • “/wrdn-effect-atom-reactivity-keys”

Requirements

  • Pre-approved tools (allowed-tools): Read, Grep, Glob, Bash

What it can do on your machine

Read from SKILL.md and the folder at commit 9ef04e9. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Grep
    • Glob
    • Bash

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Wrdn Effect Atom Reactivity Keys loads about 204 tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 61 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~45
When it runs · the whole SKILL.md, loaded when a task matches
~204

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Grep, Glob, Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from UsefulSoftwareCo/executor at commit 9ef04e9, republished under its MIT licence (© UsefulSoftwareCo). 61 words, ~204 tokens.

Download SKILL.mdSave it as .claude/skills/wrdn-effect-atom-reactivity-keys/SKILL.md (or your agent's skills folder).
name
wrdn-effect-atom-reactivity-keys
description
Add reactivityKeys to effect-atom write mutation calls. Use when lint flags a useAtomSet mutation call that mutates data without invalidation keys.
allowed-tools
Read, Grep, Glob, Bash

Effect-atom write mutations must say which reads they invalidate.

Fix Shape

  • Find the useAtomSet(...) write mutation call.
  • Add reactivityKeys to the mutation payload at the call site.
  • Use the narrowest keys that cover the rows/lists affected by the write.
  • Keep read-only probe/preview OAuth flows out of this pattern.
  • If the mutation should update UI immediately, check whether wrdn-effect-atom-optimistic also applies.

Good

ts
await updateSource({
  params: { scopeId, sourceId },
  payload,
  reactivityKeys: [["sources", scopeId]],
});

© UsefulSoftwareCo, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/wrdn-effect-atom-reactivity-keys of UsefulSoftwareCo/executor.

Open the folder on GitHubat commit 9ef04e9

Compare with similar skills

Wrdn Effect Atom Reactivity Keys next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Wrdn Effect Atom Reactivity Keys compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Wrdn Effect Atom Reactivity Keys this skillUsefulSoftwareCo/executor4.1k—~204Automated safety check: NotesMIT
Golem Atomic Block Effectgolemcloud/golem1.5k—~3.3kAutomated safety check: PassCustom licence
Compose Atomslobehub/lobehub83k—~2.6kAutomated safety check: PassCustom licence
Add Effectremotion-dev/remotion63k—~2.8kAutomated safety check: PassCustom licence
Effect V4ComposioHQ/composio30k—~1kAutomated safety check: PassMIT
Parallax Effectsthedaviddias/Front-End-Checklist74k—~523Automated safety check: PassMIT

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Questions about Wrdn Effect Atom Reactivity Keys

What does Wrdn Effect Atom Reactivity Keys do?

Add reactivityKeys to effect-atom write mutation calls. An agent skill from UsefulSoftwareCo/executor. Wrdn Effect Atom Reactivity Keys is an agent skill from UsefulSoftwareCo/executor. Add reactivityKeys to effect-atom write mutation calls.

When should I use Wrdn Effect Atom Reactivity Keys?

Wrdn Effect Atom Reactivity Keys fits situations like: lint flags a useAtomSet mutation call that mutates data without invalidation keys.

How do I install Wrdn Effect Atom Reactivity Keys in Claude Code?

Run `npx skills add UsefulSoftwareCo/executor --skill wrdn-effect-atom-reactivity-keys -a claude-code`. Or copy the skill folder (.agents/skills/wrdn-effect-atom-reactivity-keys in UsefulSoftwareCo/executor) into .claude/skills/wrdn-effect-atom-reactivity-keys in your project. Claude Code loads it when a task matches its description.

How do I install Wrdn Effect Atom Reactivity Keys in Codex?

Run `npx skills add UsefulSoftwareCo/executor --skill wrdn-effect-atom-reactivity-keys -a codex`. Or copy the skill folder (.agents/skills/wrdn-effect-atom-reactivity-keys in UsefulSoftwareCo/executor) into .agents/skills/wrdn-effect-atom-reactivity-keys in your project. Codex loads it when a task matches its description.

Can I use Wrdn Effect Atom Reactivity Keys in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add UsefulSoftwareCo/executor --skill wrdn-effect-atom-reactivity-keys -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/wrdn-effect-atom-reactivity-keys, .gemini/skills/wrdn-effect-atom-reactivity-keys, .github/skills/wrdn-effect-atom-reactivity-keys and .opencode/skills/wrdn-effect-atom-reactivity-keys in your project.

What does Wrdn Effect Atom Reactivity Keys need to run?

SKILL.md names no scripts, command-line tools or credentials: Wrdn Effect Atom Reactivity Keys is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Grep, Glob, Bash.

Does Wrdn Effect Atom Reactivity Keys access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Wrdn Effect Atom Reactivity Keys safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Wrdn Effect Atom Reactivity Keys use?

Wrdn Effect Atom Reactivity Keys is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Wrdn Effect Atom Reactivity Keys use?

About 204 tokens (SKILL.md is roughly 816 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Wrdn Effect Atom Reactivity Keys?

Skills that share tags, products or a category with Wrdn Effect Atom Reactivity Keys: Golem Atomic Block Effect (golemcloud/golem, 1.5k stars), Compose Atoms (lobehub/lobehub, 83k stars), Add Effect (remotion-dev/remotion, 63k stars) and Effect V4 (ComposioHQ/composio, 30k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Wrdn Effect Atom Reactivity Keys?

UsefulSoftwareCo (a GitHub organization) maintains it in UsefulSoftwareCo/executor, which has 4,111 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on October 9, 2026.

Source: UsefulSoftwareCo/executor on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.