A guide for adding the Everything development authentication plugin to a project using Better Auth. It covers registering the plugin, connecting its client to a user interface, and protecting routes with login sessions.

Use it when configuring auth-plugin in bos.config.json, setting up the Better Auth client, composing plugins, or requiring users to be signed in before viewing routes.

It removes the guesswork from wiring sign-in methods, passkeys, API keys, organizations, and session checks into an existing project.

auth-plugin — Skill for Claude Code and Codex by NEARBuilders

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 NEARBuilders/everything-dev --skill auth-plugin

Clone the repo

git clone --depth 1 https://github.com/NEARBuilders/everything-dev

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/nearbuilders/everything-dev/auth-plugin/github.svg)](https://agentmods.dev/skills/nearbuilders/everything-dev/auth-plugin)

Your own site

<a href="https://agentmods.dev/skills/nearbuilders/everything-dev/auth-plugin"><img src="https://agentmods.dev/badge/skills/nearbuilders/everything-dev/auth-plugin/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/nearbuilders/everything-dev/auth-plugin"><img src="https://agentmods.dev/badge/skills/nearbuilders/everything-dev/auth-plugin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 182 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 5,209 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00182	$0.05209
Opus 5.5	$0.00073	$0.02084
Sonnet 5.5	$0.00036	$0.01042
Haiku 4.5	$0.00018	$0.00521

Measured yesterday against content hash e4efd8ca8989, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

auth-plugin 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 yesterday.

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.

packages/better-near-auth/skills/auth-plugin/SKILL.md · 411 lines

The source is not reproduced here

No licence file

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.

yesterday Changed e4efd8ca8989
3d ago Changed 6ab7bf4e6c93
11d ago Changed bebb8c60d7fc
15d ago Changed 5d2f8306b576
16d ago Changed 9e7069d77fb9
17d ago Changed 88e0d511df1f
22d ago Changed · +37 lines 2388c8258f9a
27d ago Changed 0566c09e6dfa
29d ago Changed · +23 lines a28441dfff05
1mo ago First seen · 351 lines · 182 tokens per session scan A 1381250f82f9

Subscribe to this mod's changes

auth-plugin is a skill published in the GitHub repository NEARBuilders/everything-dev (5 stars, last pushed yesterday), with no licence file. It adds 182 tokens to every session and 5,209 once invoked, about $0.0007 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 2026-10-04.

Backend and APIs Security

auth-plugin next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
auth-pluginNEARBuilders/everything-dev	Skill	5	yesterday	none	A	182	Claude Code, Codex
mem0-oss-to-platformmem0ai/mem0	Skill	68k	2d ago	Apache-2.0	A	217	Claude Code, Codex
azure-mgmt-botservice-dotnetmicrosoft/skills	Skill	3.2k	yesterday	MIT	A	78	Claude Code
fastapi-router-pymicrosoft/skills	Skill	3.2k	yesterday	MIT	A	46	Claude Code
dev-runtimelangwatch/langwatch	Skill	5.0k	yesterday	Apache-2.0	A	172	Claude Code
api-designericrisco/rsc-harness	Skill	503	2d ago	MIT	A	105	Claude Code, Codex
migrate-segw-to-raparc-mcp/arc-1	Skill	252	yesterday	MIT	A	106	Claude Code