Keeper Stress Analysis
ClickHouse/ClickHouse
Analyze ClickHouse Keeper stress-test results from play.clickhouse.com / keeperstresstests data warehouse.
Creating, editing, and managing extensions — sandboxed Alpine.js mini-apps that run inside iframes.
Install Extensions
$ npx skills add BuilderIO/agent-native --skill extensions -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install BuilderIO/agent-native extensions --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/BuilderIO/agent-native.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/extensions .claude/skills/extensions && 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 "extensions" agent skill from https://github.com/BuilderIO/agent-native/tree/main/.agents/skills/extensions into .claude/skills/extensions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "extensions", 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/BuilderIO/agent-native/tree/main/.agents/skills/extensionsType 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 BuilderIO/agent-native --skill extensions -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install BuilderIO/agent-native extensions --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/extensions .agents/skills/extensions && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "extensions" agent skill from https://github.com/BuilderIO/agent-native/tree/main/.agents/skills/extensions into .agents/skills/extensions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "extensions", 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 BuilderIO/agent-native --skill extensions -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install BuilderIO/agent-native extensions --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/extensions .cursor/skills/extensions && 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 "extensions" agent skill from https://github.com/BuilderIO/agent-native/tree/main/.agents/skills/extensions into .cursor/skills/extensions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "extensions", 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/BuilderIO/agent-native.git --path .agents/skills/extensions--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 BuilderIO/agent-native --skill extensions -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install BuilderIO/agent-native extensions --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/extensions .gemini/skills/extensions && 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 "extensions" agent skill from https://github.com/BuilderIO/agent-native/tree/main/.agents/skills/extensions into .gemini/skills/extensions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "extensions", 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 BuilderIO/agent-native extensionsInstalls 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 BuilderIO/agent-native --skill extensions -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/extensions .github/skills/extensions && 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 "extensions" agent skill from https://github.com/BuilderIO/agent-native/tree/main/.agents/skills/extensions into .github/skills/extensions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "extensions", 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 BuilderIO/agent-native --skill extensions -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install BuilderIO/agent-native extensions --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/extensions .opencode/skills/extensions && 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 "extensions" agent skill from https://github.com/BuilderIO/agent-native/tree/main/.agents/skills/extensions into .opencode/skills/extensions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "extensions", 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
extensions- GitHub stars
- 7.1k
- Token cost
- ~6.7k tokens
- SKILL.md length
- 2,991 words
- Files
- 3 (incl. references)
- Skills in repo
- 102
- Repo updated
- First seen
- Licence
- None found
At a glance
Creating, editing, and managing extensions — sandboxed Alpine.js mini-apps that run inside iframes.
- Works in 3 steps: Briefly explain the extension boundary. → Do not stop at "an extension cannot do… → Continue through the normal source-code…
- Databases work in your project
- SKILL.md covers References, CRITICAL: What Extensions Are…, When the Request Needs Code… and Data Persistence is Built In, plus 10 more sections
- Calls pnpm; needs OPENAI_API_KEY and ANTHROPIC_API_KEY
What it does
Extensions is an agent skill from BuilderIO/agent-native. Creating, editing, and managing extensions — sandboxed Alpine.js mini-apps that run inside iframes. Use only when the host app explicitly enables extensions and the user asks for a one-off custom block or mini-app. Distinct from LLM "tools" (function calls) — see note below.
Its SKILL.md is about 6.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `references/api.md` and `references/examples.md`).
It sits in Databases. The repository describes itself as: A framework for building agentic apps.
When your agent uses it
- Databases work in your project
Example prompts
- “/extensions”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Briefly explain the extension boundary.
- Do not stop at "an extension cannot do that," and do not silently move the
- Continue through the normal source-code customization flow
What it can do on your machine
Read from SKILL.md and the folder at commit e16da0c. 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:
pnpm
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 these keys or tokens, usually read from environment variables:
OPENAI_API_KEYANTHROPIC_API_KEYGITHUB_TOKEN
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Extensions loads about 6.7k tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 72 tokens; SKILL.md has 2,991 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
Without a licence we can't republish the file, so here is its outline and opening line. It has 2,991 words (~6,738 tokens).
“appFetch, dbQuery, dbExec, extensionFetch, extensionData), secrets, Tailwind classes, sharing, navigation, routes, and the full back-compat naming table. Read this when you need the precise signature, scope option, or route for any helper.”
- name
- extensions
- metadata.internal
- true
Files
SKILL.md and 2 other files (references) in .agents/skills/extensions of BuilderIO/agent-native.
- SKILL.md
- references/api.md
- references/examples.md
Open the folder on GitHubat commit e16da0c
Compare with similar skills
Extensions 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 |
|---|---|---|---|---|---|---|
| Extensions this skillBuilderIO/agent-native | 7.1k | — | ~6.7k | Automated safety check: Pass | None | |
| Keeper Stress AnalysisClickHouse/ClickHouse | 50k | — | ~4.7k | Automated safety check: Pass | Apache-2.0 | |
| Perf ComparisonClickHouse/ClickHouse | 50k | — | ~3.9k | Automated safety check: Notes | Apache-2.0 | |
| Patch Release CheckClickHouse/ClickHouse | 50k | — | ~4k | Automated safety check: Notes | Apache-2.0 | |
| Evolving The Data ModelTriliumNext/Trilium | 38k | — | ~2.1k | Automated safety check: Pass | AGPL-3.0 | |
| Hybrid Cloud Outboxesgetsentry/sentry | 46k | — | ~4.8k | Automated safety check: Pass | Custom licence |
Similar skills
Perf Comparison
ClickHouse/ClickHouse
Evaluate ClickHouse performance test results from existing CI/dashboard data or local perf.py runs.
Patch Release Check
ClickHouse/ClickHouse
Check whether ClickHouse's supported versions (last 3 majors + latest LTS) have recent stable patch releases, diagnose why the scheduled AutoReleases pipeline failed, and identify which releases…
Evolving The Data Model
TriliumNext/Trilium
A skill your agent uses when adding a DB migration or a new column/field to a Becca entity in Trilium ("add a migration", "new column on notes/attributes", "ALTER TABLE", "add a field to…
- Official
Hybrid Cloud Outboxes
getsentry/sentry
Guide for creating and maintaining outbox-based eventually consistent operations in Sentry.
- Official
Adaptive Spin Wait
microsoft/garnet
Selects Garnet spin-wait policies based on the slow-path cost.
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Related
Categories
Questions about Extensions
What does Extensions do?
Creating, editing, and managing extensions — sandboxed Alpine.js mini-apps that run inside iframes. Extensions is an agent skill from BuilderIO/agent-native.js mini-apps that run inside iframes.
When should I use Extensions?
Extensions fits situations like: databases work in your project.
How do I install Extensions in Claude Code?
Run `npx skills add BuilderIO/agent-native --skill extensions -a claude-code`. Or copy the skill folder (.agents/skills/extensions in BuilderIO/agent-native) into .claude/skills/extensions in your project. Claude Code loads it when a task matches its description.
How do I install Extensions in Codex?
Run `npx skills add BuilderIO/agent-native --skill extensions -a codex`. Or copy the skill folder (.agents/skills/extensions in BuilderIO/agent-native) into .agents/skills/extensions in your project. Codex loads it when a task matches its description.
Can I use Extensions 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 BuilderIO/agent-native --skill extensions -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/extensions, .gemini/skills/extensions, .github/skills/extensions and .opencode/skills/extensions in your project.
What does Extensions need to run?
Going by SKILL.md and its folder, Extensions needs the command-line tools its instructions call (pnpm) and credentials named OPENAI_API_KEY, ANTHROPIC_API_KEY and GITHUB_TOKEN.
Does Extensions 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 Extensions 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 Extensions use?
No licence was found for Extensions or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Extensions use?
About 6.7k tokens (SKILL.md is roughly 27k 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 6.2k tokens, read only when the agent opens those files.
What are the alternatives to Extensions?
Skills that share tags, products or a category with Extensions: Keeper Stress Analysis (ClickHouse/ClickHouse, 50k stars), Perf Comparison (ClickHouse/ClickHouse, 50k stars), Patch Release Check (ClickHouse/ClickHouse, 50k stars) and Evolving The Data Model (TriliumNext/Trilium, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Extensions?
BuilderIO (a GitHub organization) maintains it in BuilderIO/agent-native, which has 7,087 GitHub stars. The repository holds 102 skills in this directory. The repository was last updated on October 8, 2026.
Source: BuilderIO/agent-native on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.