auth

auth is a skill for Claude Code from get-convex/convex-backend-skill. It costs 62 tokens per session (803 once invoked), scanned A, original, no licence file.

An authentication setup for an existing Convex and web app. Authentication lets users prove who they are when signing in, with passkeys used by default and OAuth or passwords available optionally.

In plain words
What is it for?
It helps add login, user accounts, passkeys, OAuth, or password-based access.
Why use it?
It connects sign-in and account handling across the app, including the required auth.config.ts file.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the convex plugin — 16 skills, 1 command, 2 agents, 3 hooks, 1 MCP server shipped together

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.

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

Made for: Claude Code.

Or install convex, the plugin that ships this one along with the rest of its 16 skills, 1 command, 2 agents, 3 hooks, 1 MCP server.

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 auth

README.md
[![agentmods](https://agentmods.dev/badge/skills/get-convex/convex-backend-skill/auth.svg)](https://agentmods.dev/skills/get-convex/convex-backend-skill/auth)
Your own site
<a href="https://agentmods.dev/skills/get-convex/convex-backend-skill/auth"><img src="https://agentmods.dev/badge/skills/get-convex/convex-backend-skill/auth.svg" alt="Measured on agentmods" height="20"></a>
Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 803 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00062 $0.00803
Opus 5 $0.00031 $0.00402
Sonnet 5 $0.00012 $0.00161
Haiku 4.5 $0.00006 $0.00080

Measured 6d ago against content hash 0086a9d6f4e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

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 6d 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.

skills/auth/SKILL.md · 26 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 6d ago First seen · 26 lines · 62 tokens per session scan A 0086a9d6f4e2

Subscribe to this mod's changes

auth is a skill published in the GitHub repository get-convex/convex-backend-skill (6 stars, last pushed 8d ago), with no licence file. It adds 62 tokens to every session and 803 once invoked, about $0.0003 per session on Opus 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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