AI SDK
vercel-labs/ai-facts
Answer questions about the AI SDK and help build AI-powered features.
Run live eval sessions against the vercel-plugin to verify hook behavior, skill injection, dedup correctness, and coverage.
Install Vercel Plugin Eval
$ npx skills add vercel/vercel-plugin --skill vercel-plugin-eval -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vercel/vercel-plugin vercel-plugin-eval --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/vercel/vercel-plugin.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/vercel-plugin-eval .claude/skills/vercel-plugin-eval && 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 "vercel-plugin-eval" agent skill from https://github.com/vercel/vercel-plugin/tree/main/.claude/skills/vercel-plugin-eval into .claude/skills/vercel-plugin-eval/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-plugin-eval", 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/vercel/vercel-plugin/tree/main/.claude/skills/vercel-plugin-evalType 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 vercel/vercel-plugin --skill vercel-plugin-eval -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vercel/vercel-plugin vercel-plugin-eval --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/vercel-plugin-eval .agents/skills/vercel-plugin-eval && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "vercel-plugin-eval" agent skill from https://github.com/vercel/vercel-plugin/tree/main/.claude/skills/vercel-plugin-eval into .agents/skills/vercel-plugin-eval/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-plugin-eval", 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 vercel/vercel-plugin --skill vercel-plugin-eval -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vercel/vercel-plugin vercel-plugin-eval --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/vercel-plugin-eval .cursor/skills/vercel-plugin-eval && 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 "vercel-plugin-eval" agent skill from https://github.com/vercel/vercel-plugin/tree/main/.claude/skills/vercel-plugin-eval into .cursor/skills/vercel-plugin-eval/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-plugin-eval", 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/vercel/vercel-plugin.git --path .claude/skills/vercel-plugin-eval--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 vercel/vercel-plugin --skill vercel-plugin-eval -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vercel/vercel-plugin vercel-plugin-eval --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/vercel-plugin-eval .gemini/skills/vercel-plugin-eval && 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 "vercel-plugin-eval" agent skill from https://github.com/vercel/vercel-plugin/tree/main/.claude/skills/vercel-plugin-eval into .gemini/skills/vercel-plugin-eval/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-plugin-eval", 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 vercel/vercel-plugin vercel-plugin-evalInstalls 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 vercel/vercel-plugin --skill vercel-plugin-eval -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/vercel-plugin-eval .github/skills/vercel-plugin-eval && 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 "vercel-plugin-eval" agent skill from https://github.com/vercel/vercel-plugin/tree/main/.claude/skills/vercel-plugin-eval into .github/skills/vercel-plugin-eval/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-plugin-eval", 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 vercel/vercel-plugin --skill vercel-plugin-eval -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install vercel/vercel-plugin vercel-plugin-eval --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/vercel/vercel-plugin.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/vercel-plugin-eval .opencode/skills/vercel-plugin-eval && 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 "vercel-plugin-eval" agent skill from https://github.com/vercel/vercel-plugin/tree/main/.claude/skills/vercel-plugin-eval into .opencode/skills/vercel-plugin-eval/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vercel-plugin-eval", 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
vercel-plugin-eval- GitHub stars
- 301
- Token cost
- ~1.2k tokens
- SKILL.md length
- 395 words
- Files
- 1
- Skills in repo
- 38
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Run live eval sessions against the vercel-plugin to verify hook behavior, skill injection, dedup correctness, and coverage.
- Works in 5 steps: Session index — slug, session ID, unique… → Hook coverage matrix — which hooks fired… → Skill injection table — which of the 44… → …
- Tasks that involve Test coverage
- SKILL.md covers DO NOT (Hard Rules), Quick Start, What to Monitor and Scenario Design, plus 2 more sections
- Calls npx, node and claude
What it does
Vercel Plugin Eval is an agent skill from vercel/vercel-plugin, published by the product's own GitHub organization. Run live eval sessions against the vercel-plugin to verify hook behavior, skill injection, dedup correctness, and coverage. Launches real Claude Code sessions via WezTerm, monitors debug logs, and produces a structured coverage report.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Testing & QA, covering Test coverage. It works with Vercel, Vercel AI SDK, Turborepo and Next.js. The repository describes itself as: Comprehensive Vercel ecosystem plugin — relational knowledge graph, skills for every major product, specialized agents, and Vercel conventions. Turns any AI agent into a Vercel…
When your agent uses it
- Tasks that involve Test coverage
Example prompts
- “/vercel-plugin-eval”
Requirements
- Node.js
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Session index — slug, session ID, unique skills, dedup status
- Hook coverage matrix — which hooks fired in which sessions
- Skill injection table — which of the 44 skills triggered
- Dedup stats — injections vs claims per session
- Issues found — bugs, pattern gaps, validation findings
What it can do on your machine
Read from SKILL.md and the folder at commit 82fa491. 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:
npxnodeclaudebash
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npx, 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
Vercel Plugin Eval loads about 1.2k tokens when it runs. Until then it costs about 64 tokens; SKILL.md has 395 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 395 words (~1,236 tokens).
“Launch real Claude Code sessions with the plugin installed, monitor debug logs in real-time, and verify every hook fires correctly with proper dedup.”
- name
- vercel-plugin-eval
Files
Just SKILL.md in .claude/skills/vercel-plugin-eval of vercel/vercel-plugin.
Open the folder on GitHubat commit 82fa491
Compare with similar skills
Vercel Plugin Eval 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 |
|---|---|---|---|---|---|---|
| Vercel Plugin Eval this skillvercel/vercel-plugin | 301 | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| AI SDKvercel-labs/ai-facts | 168 | 21 repos | ~1.2k | Automated safety check: Pass | None | |
| Scaffold Nextjsmblode/agent-skills | 142 | — | ~2.8k | Automated safety check: Pass | MIT | |
| Senior QAnicepkg/auto-company | 192 | 3 repos | ~1.1k | Automated safety check: Notes | None | |
| Workflowzoonk/zoonk | 157 | — | ~3.1k | Automated safety check: Pass | MIT | |
| TDD ImplementFastLED/FastLED | 7.5k | — | ~1k | Automated safety check: Pass | MIT |
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nicepkg/auto-company
Comprehensive QA and testing skill for quality assurance, test automation, and testing strategies for ReactJS, NextJS, NodeJS applications.
Workflow
zoonk/zoonk
Creates durable, resumable workflows using Vercel's Workflow DevKit.
TDD Implement
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Implement a feature or fix a bug using strict TDD. An agent skill from FastLED/FastLED.
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Questions about Vercel Plugin Eval
What does Vercel Plugin Eval do?
Run live eval sessions against the vercel-plugin to verify hook behavior, skill injection, dedup correctness, and coverage. Vercel Plugin Eval is an agent skill from vercel/vercel-plugin, published by the product's own GitHub organization. Run live eval sessions against the vercel-plugin to verify hook behavior, skill injection, dedup correctness, and coverage.
When should I use Vercel Plugin Eval?
Vercel Plugin Eval fits situations like: tasks that involve Test coverage.
How do I install Vercel Plugin Eval in Claude Code?
Run `npx skills add vercel/vercel-plugin --skill vercel-plugin-eval -a claude-code`. Or copy the skill folder (.claude/skills/vercel-plugin-eval in vercel/vercel-plugin) into .claude/skills/vercel-plugin-eval in your project. Claude Code loads it when a task matches its description.
How do I install Vercel Plugin Eval in Codex?
Run `npx skills add vercel/vercel-plugin --skill vercel-plugin-eval -a codex`. Or copy the skill folder (.claude/skills/vercel-plugin-eval in vercel/vercel-plugin) into .agents/skills/vercel-plugin-eval in your project. Codex loads it when a task matches its description.
Can I use Vercel Plugin Eval 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 vercel/vercel-plugin --skill vercel-plugin-eval -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/vercel-plugin-eval, .gemini/skills/vercel-plugin-eval, .github/skills/vercel-plugin-eval and .opencode/skills/vercel-plugin-eval in your project.
What does Vercel Plugin Eval need to run?
Going by SKILL.md and its folder, Vercel Plugin Eval needs the command-line tools its instructions call (npx, node, claude and bash). Our summary lists: Node.js.
Does Vercel Plugin Eval access the network?
SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Vercel Plugin Eval 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 Vercel Plugin Eval use?
Vercel Plugin Eval 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 Vercel Plugin Eval use?
About 1.2k tokens (SKILL.md is roughly 4.9k 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 Vercel Plugin Eval?
Skills that share tags, products or a category with Vercel Plugin Eval: AI SDK (vercel-labs/ai-facts, 168 stars), Scaffold Nextjs (mblode/agent-skills, 142 stars), Senior QA (nicepkg/auto-company, 192 stars) and Workflow (zoonk/zoonk, 157 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Vercel Plugin Eval?
vercel (a GitHub organization, an official publisher) maintains it in vercel/vercel-plugin, which has 301 GitHub stars. The repository holds 38 skills in this directory. The repository was last updated on October 6, 2026.
Source: vercel/vercel-plugin on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.