Vercel Composition Patterns
supabase/supabase
React composition patterns that scale. An agent skill from supabase/supabase.
Emit and query Vercel Custom Metrics. An agent skill from vercel/vercel-plugin.
OfficialCustom licenceAuto-check passed
Install Custom Metrics
$ npx skills add vercel/vercel-plugin --skill custom-metrics -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install vercel/vercel-plugin custom-metrics --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/skills/custom-metrics .claude/skills/custom-metrics && 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 "custom-metrics" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/custom-metrics into .claude/skills/custom-metrics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "custom-metrics", 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/skills/custom-metricsType 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 custom-metrics -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install vercel/vercel-plugin custom-metrics --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/skills/custom-metrics .agents/skills/custom-metrics && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "custom-metrics" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/custom-metrics into .agents/skills/custom-metrics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "custom-metrics", 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 custom-metrics -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install vercel/vercel-plugin custom-metrics --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/skills/custom-metrics .cursor/skills/custom-metrics && 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 "custom-metrics" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/custom-metrics into .cursor/skills/custom-metrics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "custom-metrics", 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 skills/custom-metrics--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 custom-metrics -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install vercel/vercel-plugin custom-metrics --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/skills/custom-metrics .gemini/skills/custom-metrics && 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 "custom-metrics" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/custom-metrics into .gemini/skills/custom-metrics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "custom-metrics", 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 custom-metricsInstalls 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 custom-metrics -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/skills/custom-metrics .github/skills/custom-metrics && 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 "custom-metrics" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/custom-metrics into .github/skills/custom-metrics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "custom-metrics", 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 custom-metrics -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 custom-metrics --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/skills/custom-metrics .opencode/skills/custom-metrics && 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 "custom-metrics" agent skill from https://github.com/vercel/vercel-plugin/tree/main/skills/custom-metrics into .opencode/skills/custom-metrics/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "custom-metrics", 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
custom-metrics- GitHub stars
- 301
- Token cost
- ~1.6k tokens
- SKILL.md length
- 509 words
- Files
- 2
- Skills in repo
- 38
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Emit and query Vercel Custom Metrics. An agent skill from vercel/vercel-plugin.
- Works in 5 steps: Confirm the function was deployed to… → Confirm @vercel/functions exports… → Check vc whoami, the selected team, and… → …
- Instrumenting application
- SKILL.md covers Emit a metric, Model metrics for useful queries, Discover and query the metric and Use the right signal
- Calls pnpm
What it does
Custom Metrics is an agent skill from vercel/vercel-plugin, published by the product's own GitHub organization. Emit and query Vercel Custom Metrics. Use when instrumenting application or business measurements in Vercel Functions, using metric() from @vercel/functions, choosing metric names and attributes, or querying emitted values with vc metrics.
Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.
It works with Vercel. 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
- Instrumenting application
- Business measurements in Vercel Functions
- Using metric() from @vercel/functions
- Choosing metric names and attributes
Example prompts
- “/custom-metrics”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Confirm the function was deployed to Vercel and the instrumented path actually ran.
- Confirm @vercel/functions exports metric; upgrade it if necessary.
- Check vc whoami, the selected team, and the linked project.
- Allow for ingestion delay, then rerun vc metrics schema.
- Confirm Observability Plus and Custom Metrics are enabled for the team.
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:
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 no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Custom Metrics loads about 1.6k tokens when it runs. Until then it costs about 64 tokens; SKILL.md has 509 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 509 words (~1,631 tokens).
“Use Custom Metrics for numeric application and business measurements emitted by server-side code running in a Vercel Function. The workflow is emit a numeric sample with metric() → invoke the deployed function → discover and query the metric with vc…”
- name
- custom-metrics
- summary
- Emit numeric measurements from Functions and query them with vc metrics
- metadata.priority
- 9
- metadata.docs
- https://vercel.com/docs/functions/functions-api-reference/vercel-functions-package, https://vercel.com/docs/cli/metrics…
- metadata.sitemap
- https://vercel.com/sitemap/docs.xml
- metadata.bashPatterns
- \b(?:vercel|vc)\s+metrics\s+(?!schema(?:\s|$)|vercel\.)[A-Za-z_][A-Za-z0-9_./-]*\b, \b(?:vercel|vc)\s+metrics\s+schema\s+(?!vercel\.)[A-Za-z_][A-Za-z0-9_./-]*\b
- retrieval.aliases
- Vercel application metrics, Vercel business metrics, function metrics, vc metrics
- retrieval.intents
- emit a custom metric, instrument a Vercel Function, query a custom metric, measure application behavior
- retrieval.entities
- metric, @vercel/functions, Vercel Custom Metrics, vc metrics, Observability Plus
- retrieval.examples
- emit checkout duration as a custom metric, add a business counter to this Vercel Function, query my custom metric with vc metrics, group an application metric…
Files
SKILL.md and 1 other file in skills/custom-metrics of vercel/vercel-plugin.
- SKILL.md
- .vercel.approvers
Open the folder on GitHubat commit 82fa491
Compare with similar skills
Custom Metrics 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 |
|---|---|---|---|---|---|---|
| Custom Metrics this skillvercel/vercel-plugin | 301 | — | ~1.6k | Automated safety check: Pass | Custom licence | |
| Vercel Composition Patternssupabase/supabase | 111k | 59 repos | ~726 | Automated safety check: Pass | MIT | |
| Agent Browser CLIvercel-labs/agent-browser | 44k | 24 repos | ~864 | Automated safety check: Pass | Apache-2.0 | |
| Vercel Deploybytedance/deer-flow | 83k | 10 repos | ~797 | Automated safety check: Pass | MIT | |
| Vercel Optimize Auditvercel-labs/agent-skills | 32k | 9 repos | ~4.3k | Automated safety check: Pass | None | |
| Sandbox Benchvercel/next.js | 143k | — | ~4.1k | Automated safety check: Pass | MIT |
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Questions about Custom Metrics
What does Custom Metrics do?
Emit and query Vercel Custom Metrics. An agent skill from vercel/vercel-plugin. Custom Metrics is an agent skill from vercel/vercel-plugin, published by the product's own GitHub organization. Emit and query Vercel Custom Metrics.
When should I use Custom Metrics?
Custom Metrics fits situations like: instrumenting application; business measurements in Vercel Functions; using metric() from @vercel/functions; choosing metric names and attributes.
How do I install Custom Metrics in Claude Code?
Run `npx skills add vercel/vercel-plugin --skill custom-metrics -a claude-code`. Or copy the skill folder (skills/custom-metrics in vercel/vercel-plugin) into .claude/skills/custom-metrics in your project. Claude Code loads it when a task matches its description.
How do I install Custom Metrics in Codex?
Run `npx skills add vercel/vercel-plugin --skill custom-metrics -a codex`. Or copy the skill folder (skills/custom-metrics in vercel/vercel-plugin) into .agents/skills/custom-metrics in your project. Codex loads it when a task matches its description.
Can I use Custom Metrics 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 custom-metrics -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/custom-metrics, .gemini/skills/custom-metrics, .github/skills/custom-metrics and .opencode/skills/custom-metrics in your project.
What does Custom Metrics need to run?
Going by SKILL.md and its folder, Custom Metrics needs the command-line tools its instructions call (pnpm).
Does Custom Metrics 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 Custom Metrics 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 Custom Metrics use?
Custom Metrics 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 Custom Metrics use?
About 1.6k tokens (SKILL.md is roughly 6.5k 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 Custom Metrics?
Skills that share tags, products or a category with Custom Metrics: Vercel Composition Patterns (supabase/supabase, 111k stars), Agent Browser CLI (vercel-labs/agent-browser, 44k stars), Vercel Deploy (bytedance/deer-flow, 83k stars) and Vercel Optimize Audit (vercel-labs/agent-skills, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Custom Metrics?
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 7, 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.