Borrowing it
Nothing to install: this file belongs to wordbricks/onequery. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/wordbricks/onequery/main/.agents/skills/react-no-use-effect/SKILL.mdgit clone --depth 1 https://github.com/wordbricks/onequeryWrote 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/wordbricks/onequery/react-no-use-effect)<a href="https://agentmods.dev/skills/wordbricks/onequery/react-no-use-effect"><img src="https://agentmods.dev/badge/skills/wordbricks/onequery/react-no-use-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.
<a href="https://agentmods.dev/skills/wordbricks/onequery/react-no-use-effect"><img src="https://agentmods.dev/badge/skills/wordbricks/onequery/react-no-use-effect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00065 | $0.01792 |
| Opus 5.5 | $0.00026 | $0.00717 |
| Sonnet 5.5 | $0.00013 | $0.00358 |
| Haiku 4.5 | $0.00006 | $0.00179 |
Grade A, and why
react-no-use-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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 242 lines — stays where its author put it; the contents beside it link to each section on GitHub.
No useEffect
Never call useEffect directly. Use derived state, event handlers, data-fetching libraries, or useMountEffect instead.
Quick Reference
- Repo linting:
bun lint --format json <package-path> - Escape hatch hook:
useMountEffectfrom@onequery/ui/hooks/use-mount-effect - React docs: You Might Not Need an Effect
- Origin: https://x.com/alvinsng/status/2033969062834045089
Comment: the repo currently has
useMountEffect, but it does not appear to have a global lint rule that already bansuseEffect. Treat this skill as the policy source unless that restriction is added later.
| Instead of useEffect for... | Use |
|---|---|
| Deriving state from other state/props | Inline computation (Rule 1) |
| Fetching data | useQuery / data-fetching library (Rule 2) |
| Responding to user actions | Event handlers (Rule 3) |
| One-time external sync on mount | useMountEffect (Rule 4) |
| Resetting state when a prop changes | key prop on parent (Rule 5) |
When to Use This Skill
- Writing new React components
- Refactoring existing
useEffectcalls - Reviewing PRs that introduce
useEffect - An agent adds
useEffect"just in case"
Workflow
1. Identify the useEffect
Determine what the effect is doing: deriving state, fetching data, responding to an event, syncing with an external system, or resetting state.
2. Apply the Correct Replacement Pattern
Use the five rules below to pick the right replacement.
3. Verify
bun lint --format json <package-path>
bunx turbo typecheck --filter=<package> --json
bunx turbo test --filter=<package> --json
Use bunx turbo check --json when the change spans multiple packages or needs a whole-repo lint/format pass.
The Escape Hatch: useMountEffect
For the rare case where you need to sync with an external system on mount, use the shared wrapper from @onequery/ui/hooks/use-mount-effect.
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.
- 5d ago First seen · 242 lines · 65 tokens per session scan A 4e767afbcef9
react-no-use-effect is a skill published in the GitHub repository wordbricks/onequery (17 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 65 tokens to every session and 1,792 once invoked, about $0.0003 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 2026-09-25.
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