A project tool that creates sign-in and sign-up authentication endpoints. Authentication endpoints are the server routes that handle account registration and login.

Use it to add authentication to a project, create login and registration flows, or set up authentication from scratch.

It provides a starting point for adding user accounts instead of building the registration and login routes from scratch.

create-auth — Skill by himself65

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/himself65/auth-spec/create-auth

Any agent

npx skills add himself65/auth-spec --skill create-auth

Clone the repo

git clone --depth 1 https://github.com/himself65/auth-spec

Made for: Claude Code, Codex.

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 6,142 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.

Model	Per session	Once invoked
Fable 5	$0.00035	$0.06142
Opus 5	$0.00017	$0.03071
Sonnet 5	$0.00007	$0.01228
Haiku 4.5	$0.00003	$0.00614

Measured 3d ago against content hash 9defc1f659bd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create-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 3d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (references/express-prisma.ts, references/fastapi-sqlalchemy.py, references/nextjs-drizzle.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/create-auth/SKILL.md · 316 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

38 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

3d ago First seen · 316 lines · 35 tokens per session scan A 9defc1f659bd

Subscribe to this mod's changes

create-auth is a skill published in the GitHub repository himself65/auth-spec (41 stars, last pushed 11d ago), with no licence file. It adds 35 tokens to every session and 6,142 once invoked, about $0.0002 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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