Agent skill

Frontend Large Feature Architecture

by langfuse in langfuse/langfuse

Architect large or state-heavy Langfuse frontend features. An agent skill from langfuse/langfuse.

Custom licenceAuto-check passedFrontend & Design

Install Frontend Large Feature Architecture

skills CLI
$ npx skills add langfuse/langfuse --skill frontend-large-feature-architecture -a claude-code

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

GitHub CLI
$ gh skill install langfuse/langfuse frontend-large-feature-architecture --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/langfuse/langfuse.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/frontend-large-feature-architecture .claude/skills/frontend-large-feature-architecture && 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
frontend-large-feature-architecture
GitHub stars
36k
Token cost
~1.4k tokens
SKILL.md length
638 words
Files
8 (incl. references)
Skills in repo
33
Repo updated
First seen
Licence
Custom licence

At a glance

Architect large or state-heavy Langfuse frontend features. An agent skill from langfuse/langfuse.

  • Virtualized lists
  • SKILL.md covers Big Feature Rules, React Without useEffect, Required Model and Local Store Default, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • High-frequency state

What it does

Frontend Large Feature Architecture is an agent skill from langfuse/langfuse. Architect large or state-heavy Langfuse frontend features. Use for virtualized lists, large tables, controllers, Zustand stores, row selection, high-frequency state, rendering performance, or before adding useEffect, useMemo, useCallback, or form defaults derived from loaded data.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files, including reference files (for example `agents/openai.yaml`, `references/big-feature-rules.md` and `references/controller-migration.md`).

It sits in Frontend & Design, covering LLM observability and State management. It works with Langfuse, Zustand and React. 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

  • Virtualized lists
  • High-frequency state
  • Rendering performance
  • Before adding useEffect

Example prompts

  • “/frontend-large-feature-architecture”

What it can do on your machine

Read from SKILL.md and the folder at commit 389f393. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Frontend Large Feature Architecture loads about 1.4k tokens when it runs, and up to ~9.4k if it reads all its reference files. Until then it costs about 79 tokens; SKILL.md has 638 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~79
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~9.4k

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 638 words (~1,374 tokens).

“Use this skill when building, changing, or refactoring a large frontend surface.”

— opening of SKILL.md by langfuse, Custom licence
name
frontend-large-feature-architecture

Read the full SKILL.md on GitHub

Files

SKILL.md and 7 other files (references) in .agents/skills/frontend-large-feature-architecture of langfuse/langfuse.

  • SKILL.md
  • agents/openai.yaml
  • references/big-feature-rules.md
  • references/controller-migration.md
  • references/feature-readmes.md
  • references/local-feature-state.md
  • references/react-without-useeffect.md
  • references/virtualized-lists.md

Open the folder on GitHubat commit 389f393

Compare with similar skills

Frontend Large Feature Architecture 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.

Frontend Large Feature Architecture compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Frontend Large Feature Architecture this skilllangfuse/langfuse36k—~1.4kAutomated safety check: PassCustom licence
Xray UI Devbropines/xray-config-ui-editor119—~942Automated safety check: PassMIT
Opik Frontend Patternscomet-ml/opik22k—~1.1kAutomated safety check: PassApache-2.0
Zustand Store Patternsstellar/laboratory112—~1.4kAutomated safety check: PassApache-2.0
State Managementemanueleielo/deepagents-open-lovable111—~1.7kAutomated safety check: PassNone
React ExpertJeffallan/claude-skills12k—~1.4kAutomated safety check: PassMIT

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Questions about Frontend Large Feature Architecture

What does Frontend Large Feature Architecture do?

Architect large or state-heavy Langfuse frontend features. An agent skill from langfuse/langfuse. Frontend Large Feature Architecture is an agent skill from langfuse/langfuse. Architect large or state-heavy Langfuse frontend features.

When should I use Frontend Large Feature Architecture?

Frontend Large Feature Architecture fits situations like: virtualized lists; high-frequency state; rendering performance; before adding useEffect.

How do I install Frontend Large Feature Architecture in Claude Code?

Run `npx skills add langfuse/langfuse --skill frontend-large-feature-architecture -a claude-code`. Or copy the skill folder (.agents/skills/frontend-large-feature-architecture in langfuse/langfuse) into .claude/skills/frontend-large-feature-architecture in your project. Claude Code loads it when a task matches its description.

How do I install Frontend Large Feature Architecture in Codex?

Run `npx skills add langfuse/langfuse --skill frontend-large-feature-architecture -a codex`. Or copy the skill folder (.agents/skills/frontend-large-feature-architecture in langfuse/langfuse) into .agents/skills/frontend-large-feature-architecture in your project. Codex loads it when a task matches its description.

Can I use Frontend Large Feature Architecture 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 frontend-large-feature-architecture -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/frontend-large-feature-architecture, .gemini/skills/frontend-large-feature-architecture, .github/skills/frontend-large-feature-architecture and .opencode/skills/frontend-large-feature-architecture in your project.

What does Frontend Large Feature Architecture need to run?

SKILL.md names no scripts, command-line tools or credentials: Frontend Large Feature Architecture is instructions for the agent only.

Does Frontend Large Feature Architecture 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 Frontend Large Feature Architecture 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 Frontend Large Feature Architecture use?

Frontend Large Feature Architecture 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 Frontend Large Feature Architecture use?

About 1.4k tokens (SKILL.md is roughly 5.5k 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 8k tokens, read only when the agent opens those files.

What are the alternatives to Frontend Large Feature Architecture?

Skills that share tags, products or a category with Frontend Large Feature Architecture: Xray UI Dev (bropines/xray-config-ui-editor, 119 stars), Opik Frontend Patterns (comet-ml/opik, 22k stars), Zustand Store Patterns (stellar/laboratory, 112 stars) and State Management (emanueleielo/deepagents-open-lovable, 111 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Frontend Large Feature Architecture?

langfuse (a GitHub organization) maintains it in langfuse/langfuse, which has 35,555 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on October 9, 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.