convex-auth

convex-auth is a skill for Claude Code, Codex from get-convex/agent-skills. It costs 26 tokens per session (785 once invoked), scanned A, a copy of convex-auth, Apache-2.0.

An authentication setup for a Convex app, allowing users to prove who they are with passkeys or OAuth. OAuth lets people sign in through an existing account such as Google or GitHub.

In plain words
What is it for?
Use it to add passkey or social sign-in and connect that sign-in system to the app's Convex backend.
Why use it?
It removes the need to build the sign-in flow and its Convex configuration from scratch. It gives the app a way to identify users before they access protected features.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to add passkey or social sign-in and connect that sign-in system to the app's Convex backend.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/get-convex/agent-skills/convex-auth
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add get-convex/agent-skills --skill convex-auth
Clone the repo
git clone --depth 1 https://github.com/get-convex/agent-skills

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.

agentmods badge for convex-auth

README.md
[![agentmods](https://agentmods.dev/badge/skills/get-convex/agent-skills/convex-auth/github.svg)](https://agentmods.dev/skills/get-convex/agent-skills/convex-auth)
Your own site
<a href="https://agentmods.dev/skills/get-convex/agent-skills/convex-auth"><img src="https://agentmods.dev/badge/skills/get-convex/agent-skills/convex-auth/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.

agentmods 80×15 button for convex-auth

Your own site · 80×15
<a href="https://agentmods.dev/skills/get-convex/agent-skills/convex-auth"><img src="https://agentmods.dev/badge/skills/get-convex/agent-skills/convex-auth.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 785 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
  • Socket pass 1 Aug 2026
  • Snyk pass 1 Aug 2026
How audits are shown
Origin 100% copy Near-identical to another mod 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00026 $0.00785
Opus 5 $0.00013 $0.00392
Sonnet 5 $0.00005 $0.00157
Haiku 4.5 $0.00003 $0.00078

Measured 9d ago against content hash 4909b6f370df, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

convex-auth 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 9d 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.

Origin

This is a copy

100% identical to convex-auth — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/convex-auth/SKILL.md · 30 lines

How it starts

The opening of the file, as written. The whole thing — 30 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add sign-in to the app

Install and wire @convex-dev/auth for the current app: a provider (passkeys by default, or OAuth/password), the server config, the client hooks, and a sign-in UI — correctly, including the auth.config.ts that's the #1 real-world auth footgun.

Workflow

  1. Install @convex-dev/auth (pinned build) and add it to convex.config.ts. With pnpm, also pnpm add jose (it won't hoist otherwise); you need it for step 3.
  2. Add the provider in convex/auth.ts (Passkey by default; Password or OAuth like Google on request).
  3. Generate the auth keys HEADLESSLY. Do NOT run the interactive npx @convex-dev/auth wizard: it needs a login/TTY and hangs in non-interactive, anonymous, or CI runs (the #1 auth time-sink). Generate JWT_PRIVATE_KEY + JWKS deterministically with jose: node -e 'import("jose").then(async({generateKeyPair,exportPKCS8,exportJWK})=>{const k=await generateKeyPair("RS256",{extractable:true});const priv=await exportPKCS8(k.privateKey);const pub=await exportJWK(k.publicKey);process.stdout.write(JSON.stringify({JWT_PRIVATE_KEY:priv.trimEnd().replace(/\n/g," "),JWKS:JSON.stringify({keys:[{use:"sig",...pub}]})}))})' > .auth-keys.json Then set JWT_PRIVATE_KEY and JWKS (from .auth-keys.json) plus SITE_URL on the deployment. Prefer the Convex MCP envSet tool, one call per var, to avoid shell-quoting the multi-line key. CLI fallback: use the NAME=VALUE form (npx convex env set "JWT_PRIVATE_KEY=$JWT"), NEVER env set JWT_PRIVATE_KEY "$JWT" (the value starts with -----BEGIN and the CLI parses the leading - as an unknown flag). SITE_URL is the dev URL (e.g. http://localhost:3000). Delete .auth-keys.json after.
  4. Write convex/auth.config.ts (the silently-always-signed-out bug lives here if it's wrong).
  5. Wire the client: ConvexAuthProvider, the sign-in component, and route guards. If you import shadcn/ui primitives (button, input, textarea, label, and so on), add them first with npx shadcn@latest add <name>; a missing @/components/ui/* is a hard build error.
  6. Verify a sign-in round-trips before declaring done.

Read the full file on GitHub · 30 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.

  1. 9d ago First seen · 30 lines · 26 tokens per session scan A 4909b6f370df

Subscribe to this mod's changes

convex-auth is a skill published in the GitHub repository get-convex/agent-skills (53 stars, last pushed 5d ago), licensed Apache-2.0. It adds 26 tokens to every session and 785 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to convex-auth, differing in 0 lines, and is treated as a copy.

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