Vercel CLI Agent Skill

Vercel CLI Skill

The Vercel CLI (vercel or vc) deploys, manages, and develops projects on the Vercel platform from the command line. Use vercel <command> --help for full flag details on any command.

The installed CLI help is the source of truth for obscure or newly added flags. If a command example here is not enough, check vercel <command> --help before acting instead of guessing.

Parse only stdout for URLs and JSON. Warnings, progress, and --help print to stderr; merge streams only when searching help text. Some help commands exit 2 after printing usage, so treat printed usage as a successful help read.

In agent/non-interactive mode, many commands report errors and required confirmations as a single JSON object on stdout with status, reason, hint, and next (runnable follow-up commands). Prefer a suggested next command over composing a retry only after confirming that it preserves the user's intended target and authorization; do not automatically run linking, authentication, or mutation follow-ups. Read commands such as list, logs, inspect, and api keep their normal output shape.

Critical: Project Linking

Project context depends on the command's working directory. Before a consequential read or mutation, run vercel project inspect --non-interactive from the intended directory and confirm the reported owner and project. This command resolves only existing context in non-interactive mode; stop on link_required or a target mismatch instead of linking automatically.

Many project-aware commands also accept --project <name-or-id> with --scope <team> for an explicit, one-command target. Confirm that target and scope preserve the user's intent before using them.

• <cwd>/.vercel/project.json: Created by vercel link. This exact working-directory link wins over a repository link. The CLI does not generally inherit a root project.json when run from an arbitrary subdirectory.
• <repo-root>/.vercel/repo.json: Created by vercel link --repo. The CLI selects the deepest project directory that contains the working directory.
• Unmatched repository path: If no repo mapping contains the working directory, interactive repo resolution prompts among the configured projects. Non-interactive repo resolution currently selects the only configured project or remains unresolved when multiple choices exist. Commands that set up projects may then enter a linking flow, so non-interactive mode is not generally fail-closed.

Being inside an app directory is not proof that the intended project was selected. Check the resolved project explicitly, especially when a repo mapping does not cover that directory.

vercel whoami --format json identifies the authenticated user and effective team; plain non-TTY vercel whoami prints only the username. Neither verifies the linked project. Read-only project commands can still require login or team SAML re-authentication and open a browser/device flow. Ask the user to complete that flow deliberately before continuing.

Quick Start

npm i -g vercel
vercel login
vercel link              # single project
# OR
vercel link --repo       # monorepo
vercel pull
vercel dev        # local development
vercel deploy     # preview deployment
vercel --prod     # production deployment

Decision Tree

Use this to route to the correct reference file:

• Deploy, redeploy, forced builds, no-cache builds, or deployment source/provenance → references/deployment.md
• Rolling releases, deploy hooks, cron jobs, cache, git connection, Edge Config, redirects, custom environments → references/project-infra.md
• Local development → references/local-development.md
• Environment variables → references/environment-variables.md
• CI/CD automation → references/ci-automation.md
• Domains or DNS → references/domains-and-dns.md
• Projects or teams → references/projects-and-teams.md
• Build failures, deployment errors, logs, metrics, Speed Insights, Core Web Vitals, activity, performance, preview access, or production debugging → references/monitoring-and-debugging.md
• Alerts, usage, contracts, billing purchases, tokens, telemetry, or CLI upgrades → references/platform-ops.md
• Blob storage → references/storage.md
• Container Registry (vercel vcr: repositories, images, tags, docker/podman/buildah login, push/pull) → references/container-registry.md
• Integrations (databases, storage, etc.) → references/integrations.md
• Connectors (vercel connect) → references/connectors.md
• Routing rules → references/routing.md
• Firewall (WAF rules, IP blocks, rate limiting) → references/firewall.md
• Access a preview deployment → use vercel curl (see references/monitoring-and-debugging.md)
• CLI command is unavailable or output is missing required fields → use vercel api after first-class CLI paths are unavailable or insufficient (see references/advanced.md)
• Node.js backends (Express, Hono, etc.) → references/node-backends.md
• Monorepos (Turborepo, Nx, workspaces) → references/monorepos.md
• Bun runtime → references/bun.md
• Feature flags → references/flags.md
• Microfrontends → references/microfrontends.md
• Sandbox → references/sandbox.md
• Agent, MCP, skills discovery, or AI Gateway → references/agent-and-ai.md
• Captured request traces (vercel traces, including --open / --view) → references/advanced.md
• Vercel Apps / OAuth apps (vercel oauth-apps) → references/advanced.md
• Advanced (vercel api fallback, webhooks) → references/advanced.md
• Global flags → references/global-options.md
• First-time setup → references/getting-started.md

Anti-Patterns

• Wrong link type in monorepos with multiple projects: vercel link creates project.json, which only tracks one project. Use vercel link --repo instead. When things break, check .vercel/ first.
• Letting commands auto-link in monorepos: Many commands implicitly run vercel link if .vercel/ doesn't exist. This creates project.json, which may be wrong. Run vercel link (or --repo) explicitly first.
• Assuming an app subdirectory determines the project: Verify with vercel project inspect --non-interactive; an unmatched repo path can currently fall back to the sole configured project in non-interactive mode.
• Using vercel whoami as linked-project verification: vercel whoami --format json reports authentication and team context, not the selected project.
• Forgetting non-interactive flags in plain CI runs: detected agents get --non-interactive by default, but plain CI does not — pass it explicitly there, and add --yes only for commands that require confirmation.
• Using vercel deploy after vercel build without --prebuilt: The build output is ignored.
• Using vercel redeploy for no-cache rebuilds: vercel redeploy does not expose a no-cache flag; use vercel deploy --force without --with-cache when you need a fresh deployment that does not retain build cache.
• Hardcoding tokens in flags: Use VERCEL_TOKEN env var instead of --token.
• Disabling deployment protection: Use vercel curl instead to access preview deploys.
• Using vercel api too early: Prefer first-class CLI commands when they expose the needed data or mutation.