add-auth-endpoint

add-auth-endpoint is a skill for Claude Code from JNZader/repoforge. It costs 26 tokens per session (438 once invoked), scanned A, original, MIT.

A guide for adding authentication routes to a FastAPI server, including GitHub login and validation of JWT tokens. JWTs are signed tokens used to confirm that a request belongs to an authenticated user.

In plain words
What is it for?
Use it when adding login endpoints, connecting GitHub OAuth callbacks, validating tokens, or securing FastAPI routes.
Why use it?
It shows how to let users sign in and how to protect server routes that require a valid user.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Not installable on its own: it runs a file from its repository that does not travel with it. Clone the repository, or install whatever ships that file. The line is python apps/server/app/main.py.

Install

Getting it into your agent

There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.

Made for: Claude Code.

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 add-auth-endpoint

README.md
[![agentmods](https://agentmods.dev/badge/skills/jnzader/repoforge/auth.svg)](https://agentmods.dev/skills/jnzader/repoforge/auth)
Your own site
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Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 438 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00026 $0.00438
Opus 5 $0.00013 $0.00219
Sonnet 5 $0.00005 $0.00088
Haiku 4.5 $0.00003 $0.00044

Measured 6d ago against content hash c7a5fd360c5a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

add-auth-endpoint 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.

.claude/skills/backend/auth/SKILL.md · 90 lines

What it actually says

add-auth-endpoint

This skill covers the implementation of authentication routes.

Trigger: When setting up auth-related endpoints in the backend.

Quick Reference

Task Pattern
Login user login
Validate token validate_token

Critical Patterns (Summary)

  • Login User: Handles user login via GitHub OAuth.
  • Validate Token: Validates JWT tokens for authenticated requests.

Critical Patterns (Detailed)

Login User

Handles user login via GitHub OAuth, redirecting to the callback after authentication.

from fastapi import APIRouter
from apps.server.app.routes.auth import login

router = APIRouter()

@router.get("/login")
async def github_login():
    return await login()

Validate Token

Validates JWT tokens to ensure the user is authenticated for protected routes.

from fastapi import Depends
from apps.server.app.routes.auth import validate_token

async def get_current_user(token: str = Depends(validate_token)):
    return token

When to Use

  • When implementing user authentication in a FastAPI application.
  • When securing routes that require user validation.

Commands

docker-compose up
python apps/server/app/main.py

Anti-Patterns

Don't: Hardcode Secrets

Hardcoding secrets like JWT keys is insecure and should be avoided.

# BAD
JWT_SECRET = "mysecretkey"
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 · 90 lines · 26 tokens per session scan A c7a5fd360c5a

Subscribe to this mod's changes

add-auth-endpoint is a skill published in the GitHub repository JNZader/repoforge (5 stars, last pushed 11d ago), licensed MIT. It adds 26 tokens to every session and 438 once invoked, about $0.0001 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 2026-08-31.