Web Artifacts Builder
anthropics/skills
Builds multi-component claude.ai HTML artifacts as a small React, TypeScript and Tailwind project, then bundles it into one shareable HTML file.
Build and edit schedule / timeline / agenda / planner / booking-grid / program-guide UIs with planby (open source) in React — any "rows x time" layout: conference and event agendas, festival…
Custom licenceAuto-check passed
Install Planby
$ npx skills add karolkozer/planby --skill planby -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install karolkozer/planby planby --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/karolkozer/planby.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/planby .claude/skills/planby && 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 "planby" agent skill from https://github.com/karolkozer/planby/tree/master/skills/planby into .claude/skills/planby/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "planby", 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/karolkozer/planby/tree/master/skills/planbyType 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 karolkozer/planby --skill planby -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install karolkozer/planby planby --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/karolkozer/planby.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/planby .agents/skills/planby && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "planby" agent skill from https://github.com/karolkozer/planby/tree/master/skills/planby into .agents/skills/planby/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "planby", 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 karolkozer/planby --skill planby -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install karolkozer/planby planby --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/karolkozer/planby.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/planby .cursor/skills/planby && 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 "planby" agent skill from https://github.com/karolkozer/planby/tree/master/skills/planby into .cursor/skills/planby/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "planby", 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/karolkozer/planby.git --path skills/planby--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 karolkozer/planby --skill planby -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install karolkozer/planby planby --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/karolkozer/planby.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/planby .gemini/skills/planby && 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 "planby" agent skill from https://github.com/karolkozer/planby/tree/master/skills/planby into .gemini/skills/planby/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "planby", 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 karolkozer/planby planbyInstalls 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 karolkozer/planby --skill planby -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/karolkozer/planby.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/planby .github/skills/planby && 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 "planby" agent skill from https://github.com/karolkozer/planby/tree/master/skills/planby into .github/skills/planby/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "planby", 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 karolkozer/planby --skill planby -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install karolkozer/planby planby --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/karolkozer/planby.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/planby .opencode/skills/planby && 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 "planby" agent skill from https://github.com/karolkozer/planby/tree/master/skills/planby into .opencode/skills/planby/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "planby", 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
planby- GitHub stars
- 1.7k
- Token cost
- ~2.1k tokens
- SKILL.md length
- 804 words
- Files
- 11 (incl. references)
- Skills in repo
- 1
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Build and edit schedule / timeline / agenda / planner / booking-grid / program-guide UIs with planby (open source) in React — any "rows x time" layout: conference and event agendas, festival…
- Works in 3 steps: Shape the data as channels[] (your rows)… → Wire useEpg + following the 4 rules below. → Ship the default look — don't over-style…
- The user wants to add
- SKILL.md covers The intended workflow (two…, When to use / when not, Install and Minimal working example (the…, plus 4 more sections
- Runs TypeScript scripts from its folder; calls yarn and npm
What it does
Planby is an agent skill from karolkozer/planby. Build and edit schedule / timeline / agenda / planner / booking-grid / program-guide UIs with planby (open source) in React — any "rows x time" layout: conference and event agendas, festival line-ups, class and shift schedules, room and resource booking grids, project timelines, streaming line-ups, and TV guides / EPGs. Use whenever the user wants to add, configure, style, or debug a Planby schedule: rows (channels) + scheduled items (epg) on a time axis, a custom Planby theme, custom item/row/timeline rendering…
Its SKILL.md is about 2.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 12 other files, including reference files (for example `examples/planby-emotion.d.ts`, `examples/tsconfig.check.json` and `references/customization.md`).
It works with React.
When your agent uses it
- The user wants to add
- Debug a Planby schedule: rows (channels) + scheduled items (epg) on a time axis
- A custom Planby theme
- Custom item/row/timeline rendering
Example prompts
- “rows x time”
- “/planby”
Requirements
- Node.js
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Shape the data as channels[] (your rows) + epg[] (your scheduled items) —
- Wire useEpg + following the 4 rules below.
- Ship the default look — don't over-style yet.
What it can do on your machine
Read from SKILL.md and the folder at commit 3d85c56. 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
Ships script files (TypeScript), which the agent can run.
Shell commands in SKILL.md call:
yarnnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use yarn and npm, 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
Planby loads about 2.1k tokens when it runs, and up to ~11k if it reads all its reference files. Until then it costs about 195 tokens; SKILL.md has 804 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 804 words (~2,111 tokens).
“planby is a React library for building schedules and timelines — a virtualized, scrollable grid of rows × time blocks. Most people reach for it to lay out a schedule: conference agendas, event and festival line-ups, booking and resource planners…”
- name
- planby
Files
SKILL.md and 10 other files (references) in skills/planby of karolkozer/planby.
- SKILL.md
- examples/phase1-build.tsx
- examples/phase2-branded.tsx
- examples/planby-emotion.d.ts
- examples/tsconfig.check.json
- references/customization.md
- references/data-schemas.md
- references/quick-start.md
- references/render-functions.md
- references/theme.md
- references/useEpg-api.md
Open the folder on GitHubat commit 3d85c56
Compare with similar skills
Planby 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 |
|---|---|---|---|---|---|---|
| Planby this skillkarolkozer/planby | 1.7k | — | ~2.1k | Automated safety check: Pass | Custom licence | |
| Web Artifacts Builderanthropics/skills | 180k | 41 repos | ~769 | Automated safety check: Pass | Apache-2.0 | |
| Vercel Composition Patternssupabase/supabase | 111k | 59 repos | ~726 | Automated safety check: Pass | MIT | |
| React Doctormakeplane/plane | 61k | 12 repos | ~657 | Automated safety check: Pass | AGPL-3.0 | |
| React Router Developmentremix-run/react-router | 57k | 1 repos | ~1.5k | Automated safety check: Pass | MIT | |
| React UI State PatternsChrisWiles/claude-code-showcase | 6.1k | 8 repos | ~1.6k | Automated safety check: Pass | None |
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- Official
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supabase/supabase
React composition patterns that scale. An agent skill from supabase/supabase.
React Doctor
makeplane/plane
Scans React code for lint, accessibility, bundle size and architecture issues, reports a health score and checks that changes do not lower it.
React Router Development
remix-run/react-router
Guides work on React Router apps by first identifying whether the app uses Framework, Data or Declarative mode, then loading the matching reference and the installed package docs.
React UI State Patterns
ChrisWiles/claude-code-showcase
Sets patterns for React interfaces: when to show loading spinners or skeletons, how to surface errors, how to disable buttons during async work and how to handle empty lists.
- Official
Stitch to Remotion Walkthrough Videos
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Related
Works with
Questions about Planby
What does Planby do?
Build and edit schedule / timeline / agenda / planner / booking-grid / program-guide UIs with planby (open source) in React — any "rows x time" layout: conference and event agendas, festival…. Planby is an agent skill from karolkozer/planby. Build and edit schedule / timeline / agenda / planner / booking-grid / program-guide UIs with planby (open source) in React — any "rows x time" layout: conference and event agendas, festival line-ups, class and shift schedules, room and resource booking grids, project timelines, streaming line-ups, and TV guides / EPGs.
When should I use Planby?
Planby fits situations like: the user wants to add; debug a Planby schedule: rows (channels) + scheduled items (epg) on a time axis; A custom Planby theme; custom item/row/timeline rendering.
How do I install Planby in Claude Code?
Run `npx skills add karolkozer/planby --skill planby -a claude-code`. Or copy the skill folder (skills/planby in karolkozer/planby) into .claude/skills/planby in your project. Claude Code loads it when a task matches its description.
How do I install Planby in Codex?
Run `npx skills add karolkozer/planby --skill planby -a codex`. Or copy the skill folder (skills/planby in karolkozer/planby) into .agents/skills/planby in your project. Codex loads it when a task matches its description.
Can I use Planby 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 karolkozer/planby --skill planby -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/planby, .gemini/skills/planby, .github/skills/planby and .opencode/skills/planby in your project.
What does Planby need to run?
Going by SKILL.md and its folder, Planby needs TypeScript for the scripts in its folder and the command-line tools its instructions call (yarn and npm). Our summary lists: Node.js.
Does Planby access the network?
SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Planby 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 Planby use?
Planby 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 Planby use?
About 2.1k tokens (SKILL.md is roughly 8.4k 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 8.7k tokens, read only when the agent opens those files.
What are the alternatives to Planby?
Skills that share tags, products or a category with Planby: Web Artifacts Builder (anthropics/skills, 180k stars), Vercel Composition Patterns (supabase/supabase, 111k stars), React Doctor (makeplane/plane, 61k stars) and React Router Development (remix-run/react-router, 57k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Planby?
karolkozer (a GitHub user) maintains it in karolkozer/planby, which has 1,720 GitHub stars. The repository was last updated on August 23, 2026.
Source: karolkozer/planby on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.