An instruction router for adding Clerk, a service that handles user accounts and sign-in, to web and mobile applications.

Use it for Clerk CLI tasks, authentication setup, custom sign-in flows, and Clerk projects built with Next.js, React, Vue, Nuxt, Astro, Expo, or other listed frameworks.

It helps choose the right setup and code patterns for the project’s framework and Clerk software version.

How vvedantb/eva configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to vvedantb/eva. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/vvedantb/eva/main/.agents/skills/clerk/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/vvedantb/eva

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vvedantb/eva/clerk/github.svg)](https://agentmods.dev/skills/vvedantb/eva/clerk)

Your own site

<a href="https://agentmods.dev/skills/vvedantb/eva/clerk"><img src="https://agentmods.dev/badge/skills/vvedantb/eva/clerk/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/vvedantb/eva/clerk"><img src="https://agentmods.dev/badge/skills/vvedantb/eva/clerk.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,551 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00110	$0.01551
Opus 5.5	$0.00044	$0.00620
Sonnet 5.5	$0.00022	$0.00310
Haiku 4.5	$0.00011	$0.00155

Measured 1mo ago against content hash 82a9c7302cdb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

clerk scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/clerk/SKILL.md · 184 lines

How it starts

The opening of the file, as written. The whole thing — 184 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Clerk Skills Router

Version Detection

Check package.json to determine the Clerk SDK version. This determines which patterns to use:

Package	Core 2 (LTS until Jan 2027)	Current
`@clerk/nextjs`	v5–v6	v7+
`@clerk/react` or `@clerk/clerk-react`	v5–v6	v7+
`@clerk/expo` or `@clerk/clerk-expo`	v1–v2	v3+
`@clerk/react-router`	v1–v2	v3+
`@clerk/tanstack-react-start`	< v0.26.0	v0.26.0+

Default to current if the version is unclear or the project is new. Core 2 packages use @clerk/clerk-react and @clerk/clerk-expo (with clerk- prefix); current packages use @clerk/react and @clerk/expo.

All skills are written for the current SDK. When something differs in Core 2, it's noted inline with > **Core 2 ONLY (skip if current SDK):** callouts. The exception is clerk-custom-ui, which has separate core-2/ and core-3/ directories for custom flow hooks since those APIs are entirely different between versions.

By Task

Adding Clerk to your project → Use clerk-setup

Framework detection and quickstart
Environment setup, API keys, Keyless flow
Migration from other auth providers

Operating Clerk from the CLI → Use clerk-cli

Auth, linking, doctor, and environment pulls
User, org, session, app, and instance management
Backend and Platform API calls through clerk api
Deploy handoff and deploy status verification

Custom sign-in/sign-up UI → Use clerk-custom-ui

Custom authentication flows with useSignIn / useSignUp hooks
Appearance and styling (themes, colors, layout)
<Show> component for conditional rendering

Advanced Next.js patterns → Use clerk-nextjs-patterns

Read the full file on GitHub · 184 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 184 lines · 110 tokens per session scan A 82a9c7302cdb

Subscribe to this mod's changes

clerk is a skill published in the GitHub repository vvedantb/eva (101 stars, last pushed today), licensed MIT. It adds 110 tokens to every session and 1,551 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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eva: Skill for Claude Code