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.
Reduce plugin page load bundle size and avoid unnecessary increases in packages/kbn-rspack-optimizer/limits.yml.
Install Optimize Bundle Size
$ npx skills add elastic/kibana --skill optimize-bundle-size -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install elastic/kibana optimize-bundle-size --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/elastic/kibana.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/optimize-bundle-size .claude/skills/optimize-bundle-size && 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 "optimize-bundle-size" agent skill from https://github.com/elastic/kibana/tree/main/.agents/skills/optimize-bundle-size into .claude/skills/optimize-bundle-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimize-bundle-size", 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/elastic/kibana/tree/main/.agents/skills/optimize-bundle-sizeType 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 elastic/kibana --skill optimize-bundle-size -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install elastic/kibana optimize-bundle-size --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/elastic/kibana.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/optimize-bundle-size .agents/skills/optimize-bundle-size && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "optimize-bundle-size" agent skill from https://github.com/elastic/kibana/tree/main/.agents/skills/optimize-bundle-size into .agents/skills/optimize-bundle-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimize-bundle-size", 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 elastic/kibana --skill optimize-bundle-size -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install elastic/kibana optimize-bundle-size --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/elastic/kibana.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/optimize-bundle-size .cursor/skills/optimize-bundle-size && 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 "optimize-bundle-size" agent skill from https://github.com/elastic/kibana/tree/main/.agents/skills/optimize-bundle-size into .cursor/skills/optimize-bundle-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimize-bundle-size", 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/elastic/kibana.git --path .agents/skills/optimize-bundle-size--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 elastic/kibana --skill optimize-bundle-size -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install elastic/kibana optimize-bundle-size --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/elastic/kibana.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/optimize-bundle-size .gemini/skills/optimize-bundle-size && 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 "optimize-bundle-size" agent skill from https://github.com/elastic/kibana/tree/main/.agents/skills/optimize-bundle-size into .gemini/skills/optimize-bundle-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimize-bundle-size", 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 elastic/kibana optimize-bundle-sizeInstalls 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 elastic/kibana --skill optimize-bundle-size -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/elastic/kibana.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/optimize-bundle-size .github/skills/optimize-bundle-size && 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 "optimize-bundle-size" agent skill from https://github.com/elastic/kibana/tree/main/.agents/skills/optimize-bundle-size into .github/skills/optimize-bundle-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimize-bundle-size", 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 elastic/kibana --skill optimize-bundle-size -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install elastic/kibana optimize-bundle-size --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/elastic/kibana.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/optimize-bundle-size .opencode/skills/optimize-bundle-size && 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 "optimize-bundle-size" agent skill from https://github.com/elastic/kibana/tree/main/.agents/skills/optimize-bundle-size into .opencode/skills/optimize-bundle-size/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimize-bundle-size", 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
optimize-bundle-size- GitHub stars
- 21k
- Token cost
- ~794 tokens
- SKILL.md length
- 269 words
- Files
- 2
- Skills in repo
- 40
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Reduce plugin page load bundle size and avoid unnecessary increases in packages/kbn-rspack-optimizer/limits.yml.
- Works in 5 steps: Set a baseline → Identify entry-chunk drivers → Apply high-impact fixes → …
- Proactively optimizing bundles
- SKILL.md covers 1) Set a baseline, 2) Identify entry-chunk drivers, 3) Apply high-impact fixes and 4) Re-measure and decide limits, plus 1 more section
- Calls node, jq and rg
What it does
Optimize Bundle Size is an agent skill from elastic/kibana, published by the product's own GitHub organization. Reduce plugin page load bundle size and avoid unnecessary increases in packages/kbn-rspack-optimizer/limits.yml. Use when proactively optimizing bundles, investigating CI page-load overages, or reviewing PRs that change bundle limits.
Its SKILL.md is about 790 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).
It sits in Frontend & Design, covering Web performance. The repository describes itself as: Your window into all of your data.
When your agent uses it
- Proactively optimizing bundles
- Investigating CI page-load overages
- Reviewing PRs that change bundle limits
Example prompts
- “/optimize-bundle-size”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Set a baseline
- Identify entry-chunk drivers
- Apply high-impact fixes
- Re-measure and decide limits
- Validate changes
What it can do on your machine
Read from SKILL.md and the folder at commit 452e025. 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:
nodejqrggit
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use git, 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
Optimize Bundle Size loads about 794 tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 269 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 269 words (~794 tokens).
“Use this workflow to keep limits stable by moving non-critical code out of the entry bundle.”
- name
- optimize-bundle-size
- disable-model-invocation
- true
Files
SKILL.md and 1 other file in .agents/skills/optimize-bundle-size of elastic/kibana.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit 452e025
Compare with similar skills
Optimize Bundle Size 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 |
|---|---|---|---|---|---|---|
| Optimize Bundle Size this skillelastic/kibana | 21k | — | ~794 | Automated safety check: Pass | Custom licence | |
| React Doctormakeplane/plane | 61k | 12 repos | ~657 | Automated safety check: Pass | AGPL-3.0 | |
| Fixing Motion Performanceibelick/ui-skills | 9.5k | 5 repos | ~1.4k | Automated safety check: Pass | MIT | |
| GSAP Performance Tuninggreensock/gsap-skills | 16k | 4 repos | ~1k | Automated safety check: Pass | MIT | |
| React Frontend Development Guidelinesdiet103/claude-code-infrastructure-showcase | 10k | 2 repos | ~2.9k | Automated safety check: Pass | MIT | |
| Web Quality Auditaddyosmani/web-quality-skills | 2.9k | — | ~2.6k | Automated safety check: Pass | MIT |
Similar skills
Fixing Motion Performance
ibelick/ui-skills
Audits and fixes web animation performance: layout thrashing, work that belongs on the compositor, scroll-linked motion and costly blur effects.
GSAP Performance Tuning
greensock/gsap-skills
Guides the agent to keep GSAP animations smooth by animating transforms and opacity, batching DOM reads and writes, and avoiding layout-heavy properties.
React Frontend Development Guidelines
diet103/claude-code-infrastructure-showcase
Guidelines for React 18 and TypeScript apps covering Suspense data fetching, lazy loading, feature folders, MUI v7 styling, TanStack Router and performance.
Web Quality Audit
addyosmani/web-quality-skills
Run an evidence-led web quality audit covering performance, accessibility, SEO, best practices, and agentic browsing.
SEO Google
AgriciDaniel/codex-seo
Google SEO APIs: Search Console (Search Analytics, URL Inspection, Sitemaps), PageSpeed Insights v5, CrUX field data with 25-week history, Indexing API v3, and GA4 organic traffic.
More from elastic/kibana
All 40 skills in this repo- Official
Cypress To Scout Migration
elastic/kibana
Migrate Kibana Cypress E2E tests (.cy.ts) to Scout (Playwright).
- Official
Activate Connector
elastic/kibana
Creates a connector instance in a running Kibana. An agent skill from elastic/kibana.
- Official
Codeql
elastic/kibana
Work with CodeQL in Kibana — write, test, and debug custom queries locally, fetch scan results from GitHub, and validate inline suppression comments.
- Official
Debug Oas
elastic/kibana
A skill your agent uses when debugging OpenAPI (OAS) issues for a specific API area in Kibana by scoping validation output with one or more --path filters, then separating structural invalid-OAS…
- Official
Evals Write Spec
elastic/kibana
Write LLM evaluation spec files with datasets, tasks, and evaluators using the @kbn/evals Playwright fixture.
- Official
Kbn GitHub
elastic/kibana
GitHub interactions via gh CLI for the Kibana repo. An agent skill from elastic/kibana.
Related
Categories
Questions about Optimize Bundle Size
What does Optimize Bundle Size do?
Reduce plugin page load bundle size and avoid unnecessary increases in packages/kbn-rspack-optimizer/limits.yml. Optimize Bundle Size is an agent skill from elastic/kibana, published by the product's own GitHub organization.yml.
When should I use Optimize Bundle Size?
Optimize Bundle Size fits situations like: proactively optimizing bundles; investigating CI page-load overages; reviewing PRs that change bundle limits.
How do I install Optimize Bundle Size in Claude Code?
Run `npx skills add elastic/kibana --skill optimize-bundle-size -a claude-code`. Or copy the skill folder (.agents/skills/optimize-bundle-size in elastic/kibana) into .claude/skills/optimize-bundle-size in your project. Claude Code loads it when a task matches its description.
How do I install Optimize Bundle Size in Codex?
Run `npx skills add elastic/kibana --skill optimize-bundle-size -a codex`. Or copy the skill folder (.agents/skills/optimize-bundle-size in elastic/kibana) into .agents/skills/optimize-bundle-size in your project. Codex loads it when a task matches its description.
Can I use Optimize Bundle Size 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 elastic/kibana --skill optimize-bundle-size -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/optimize-bundle-size, .gemini/skills/optimize-bundle-size, .github/skills/optimize-bundle-size and .opencode/skills/optimize-bundle-size in your project.
What does Optimize Bundle Size need to run?
Going by SKILL.md and its folder, Optimize Bundle Size needs the command-line tools its instructions call (node, jq, rg and git).
Does Optimize Bundle Size access the network?
SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Optimize Bundle Size 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 Optimize Bundle Size use?
Optimize Bundle Size 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 Optimize Bundle Size use?
About 794 tokens (SKILL.md is roughly 3.2k 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 Optimize Bundle Size?
Skills that share tags, products or a category with Optimize Bundle Size: React Doctor (makeplane/plane, 61k stars), Fixing Motion Performance (ibelick/ui-skills, 9.5k stars), GSAP Performance Tuning (greensock/gsap-skills, 16k stars) and React Frontend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Optimize Bundle Size?
elastic (a GitHub organization, an official publisher) maintains it in elastic/kibana, which has 21,307 GitHub stars. The repository holds 40 skills in this directory. The repository was last updated on October 9, 2026.
Source: elastic/kibana on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.