Change Cleanup
Simon-Initiative/oli-torus
Clean up and harden code introduced by the current branch without drifting into broad refactors.
Refactor avoidable React useEffect usage in Langfuse frontend code.
Install Refactor React Effects
$ npx skills add langfuse/langfuse --skill refactor-react-effects -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install langfuse/langfuse refactor-react-effects --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/langfuse/langfuse.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/refactor-react-effects .claude/skills/refactor-react-effects && rm -rf skills-srcUse ~/.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/
Install the "refactor-react-effects" agent skill from https://github.com/langfuse/langfuse/tree/main/.agents/skills/refactor-react-effects into .claude/skills/refactor-react-effects/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "refactor-react-effects", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/langfuse/langfuse/tree/main/.agents/skills/refactor-react-effectsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add langfuse/langfuse --skill refactor-react-effects -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install langfuse/langfuse refactor-react-effects --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/langfuse/langfuse.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/refactor-react-effects .agents/skills/refactor-react-effects && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "refactor-react-effects" agent skill from https://github.com/langfuse/langfuse/tree/main/.agents/skills/refactor-react-effects into .agents/skills/refactor-react-effects/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "refactor-react-effects", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add langfuse/langfuse --skill refactor-react-effects -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install langfuse/langfuse refactor-react-effects --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/langfuse/langfuse.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/refactor-react-effects .cursor/skills/refactor-react-effects && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "refactor-react-effects" agent skill from https://github.com/langfuse/langfuse/tree/main/.agents/skills/refactor-react-effects into .cursor/skills/refactor-react-effects/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "refactor-react-effects", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/langfuse/langfuse.git --path .agents/skills/refactor-react-effects--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add langfuse/langfuse --skill refactor-react-effects -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install langfuse/langfuse refactor-react-effects --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/langfuse/langfuse.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/refactor-react-effects .gemini/skills/refactor-react-effects && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "refactor-react-effects" agent skill from https://github.com/langfuse/langfuse/tree/main/.agents/skills/refactor-react-effects into .gemini/skills/refactor-react-effects/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "refactor-react-effects", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install langfuse/langfuse refactor-react-effectsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add langfuse/langfuse --skill refactor-react-effects -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/langfuse/langfuse.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/refactor-react-effects .github/skills/refactor-react-effects && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "refactor-react-effects" agent skill from https://github.com/langfuse/langfuse/tree/main/.agents/skills/refactor-react-effects into .github/skills/refactor-react-effects/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "refactor-react-effects", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add langfuse/langfuse --skill refactor-react-effects -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install langfuse/langfuse refactor-react-effects --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/langfuse/langfuse.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/refactor-react-effects .opencode/skills/refactor-react-effects && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "refactor-react-effects" agent skill from https://github.com/langfuse/langfuse/tree/main/.agents/skills/refactor-react-effects into .opencode/skills/refactor-react-effects/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "refactor-react-effects", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
refactor-react-effects- GitHub stars
- 35k
- Token cost
- ~1.7k tokens
- SKILL.md length
- 860 words
- Files
- 3 (incl. references)
- Skills in repo
- 33
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Refactor avoidable React useEffect usage in Langfuse frontend code.
- Works in 5 steps: Establish the Behavior Boundary → Inventory Every Effect → Refactor One Semantic Seam at a Time → …
- Removing effects
- SKILL.md covers Required Context, Decision Rules, Fast Smell Test and Workflow, plus 1 more section
- Calls rg and pnpm
What it does
Refactor React Effects is an agent skill from langfuse/langfuse. Refactor avoidable React useEffect usage in Langfuse frontend code. Use when adding, reviewing, or removing effects; initializing forms or local UI state from query data; synchronizing client and server state; moving mutations or async workflows out of components; cleaning every effect from a frontend submodule; or reviewing whether an effect has a valid external-system owner.
Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `agents/openai.yaml` and `references/refactoring-patterns.md`).
It sits in Development, covering Refactoring and LLM observability. It works with React and Langfuse. The repository describes itself as: 🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.
When your agent uses it
- Removing effects
- Initializing forms
- Local UI state from query data
- Synchronizing client and server state
Example prompts
- “/refactor-react-effects”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Establish the Behavior Boundary
- Inventory Every Effect
- Refactor One Semantic Seam at a Time
- Complete a Submodule Migration
- Verify
What it can do on your machine
Read from SKILL.md and the folder at commit 8b58764. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
rgpnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pnpm, which can reach the network depending on how they are called.
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
Refactor React Effects loads about 1.7k tokens when it runs, and up to ~3.1k if it reads all its reference files. Until then it costs about 101 tokens; SKILL.md has 860 words of instructions outside code blocks.
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 passed
The automated check found no risky patterns in SKILL.md.
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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 860 words (~1,673 tokens).
“Do not add useEffect by default. Use it only to synchronize a component with a concrete system outside React. If there is no external system, remove the effect.”
- name
- refactor-react-effects
Files
SKILL.md and 2 other files (references) in .agents/skills/refactor-react-effects of langfuse/langfuse.
- SKILL.md
- agents/openai.yaml
- references/refactoring-patterns.md
Open the folder on GitHubat commit 8b58764
Compare with similar skills
Refactor React Effects 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Refactor React Effects this skilllangfuse/langfuse | 35k | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| Change CleanupSimon-Initiative/oli-torus | 119 | — | ~3.7k | Automated safety check: Pass | MIT | |
| No Use Effectmattiacerutti/supernova | 187 | 2 repos | ~1.7k | Automated safety check: Pass | MIT | |
| React Best Practicesshapeshift/web | 206 | 1 repos | ~2k | Automated safety check: Pass | MIT | |
| Migrate Componentasyncapi/generator | 1.1k | — | ~3k | Automated safety check: Pass | Apache-2.0 | |
| Elixirstreamband/hydra-srt | 146 | — | ~804 | Automated safety check: Pass | Apache-2.0 |
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Related
Questions about Refactor React Effects
What does Refactor React Effects do?
Refactor avoidable React useEffect usage in Langfuse frontend code. Refactor React Effects is an agent skill from langfuse/langfuse. Refactor avoidable React useEffect usage in Langfuse frontend code.
When should I use Refactor React Effects?
Refactor React Effects fits situations like: removing effects; initializing forms; local UI state from query data; synchronizing client and server state.
How do I install Refactor React Effects in Claude Code?
Run `npx skills add langfuse/langfuse --skill refactor-react-effects -a claude-code`. Or copy the skill folder (.agents/skills/refactor-react-effects in langfuse/langfuse) into .claude/skills/refactor-react-effects in your project. Claude Code loads it when a task matches its description.
How do I install Refactor React Effects in Codex?
Run `npx skills add langfuse/langfuse --skill refactor-react-effects -a codex`. Or copy the skill folder (.agents/skills/refactor-react-effects in langfuse/langfuse) into .agents/skills/refactor-react-effects in your project. Codex loads it when a task matches its description.
Can I use Refactor React Effects 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 langfuse/langfuse --skill refactor-react-effects -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/refactor-react-effects, .gemini/skills/refactor-react-effects, .github/skills/refactor-react-effects and .opencode/skills/refactor-react-effects in your project.
What does Refactor React Effects need to run?
Going by SKILL.md and its folder, Refactor React Effects needs the command-line tools its instructions call (rg and pnpm).
Does Refactor React Effects 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 Refactor React Effects safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Refactor React Effects use?
Refactor React Effects has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Refactor React Effects use?
About 1.7k tokens (SKILL.md is roughly 6.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.4k tokens, read only when the agent opens those files.
What are the alternatives to Refactor React Effects?
Skills that share tags, products or a category with Refactor React Effects: Change Cleanup (Simon-Initiative/oli-torus, 119 stars), No Use Effect (mattiacerutti/supernova, 187 stars), React Best Practices (shapeshift/web, 206 stars) and Migrate Component (asyncapi/generator, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Refactor React Effects?
langfuse (a GitHub organization) maintains it in langfuse/langfuse, which has 35,460 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on October 7, 2026.
Source: langfuse/langfuse on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.