Python graphql

Skill Mattakushi432/Claude-Code-Skills-Custom-DevTools-Pack/plugins/devtools-pack/skills/python-graphql

A curated pack of custom Claude Code skills for developers — installable as a Claude Code plugin marketplace.

Install

npx -y skills add Mattakushi432/Claude-Code-Skills-Custom-DevTools-Pack --skill python-graphql

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When to activate: Strawberry, Graphene, GraphQL, subscriptions, dataloaders, N+1, schema-first design

SKILL.md

3.1 KB, 666 tokens by cl100k_base, as published. Nobody here has run it

Python GraphQL Patterns (Strawberry)

Schema Definition

import strawberry
from strawberry.fastapi import GraphQLRouter
from strawberry.dataloader import DataLoader
from typing import Optional
import asyncio

@strawberry.type
class User:
    id: int
    email: str
    name: str

@strawberry.type
class Post:
    id: int
    title: str
    author_id: int
    
    @strawberry.field
    async def author(self, info: strawberry.types.Info) -> User:
        return await info.context.loaders.user.load(self.author_id)

@strawberry.type
class Query:
    @strawberry.field
    async def user(self, id: int, info: strawberry.types.Info) -> Optional[User]:
        return await info.context.db.get_user(id)
    
    @strawberry.field
    async def posts(self, limit: int = 20, offset: int = 0, info: strawberry.types.Info) -> list[Post]:
        return await info.context.db.list_posts(limit=limit, offset=offset)

schema = strawberry.Schema(query=Query)

DataLoader (N+1 Prevention)

from strawberry.dataloader import DataLoader

async def load_users_by_ids(keys: list[int]) -> list[User | Exception]:
    users = await db.get_users_by_ids(keys)
    user_map = {u.id: u for u in users}
    return [user_map.get(key, Exception(f"User {key} not found")) for key in keys]

class Context:
    def __init__(self, db: Database) -> None:
        self.db = db
        self.loaders = Loaders(
            user=DataLoader(load_fn=load_users_by_ids),
        )

async def get_context(db: Database = Depends(get_db)) -> Context:
    return Context(db=db)

graphql_app = GraphQLRouter(schema, context_getter=get_context)

Mutations with Input Types

@strawberry.input
class CreatePostInput:
    title: str
    body: str

@strawberry.type
class CreatePostPayload:
    post: Optional[Post] = None
    errors: list[str] = strawberry.field(default_factory=list)

@strawberry.type
class Mutation:
    @strawberry.mutation
    async def create_post(
        self,
        input: CreatePostInput,
        info: strawberry.types.Info,
    ) -> CreatePostPayload:
        if len(input.title) < 3:
            return CreatePostPayload(errors=["Title must be at least 3 characters"])
        
        post = await info.context.db.create_post(
            title=input.title,
            body=input.body,
            author_id=info.context.current_user.id,
        )
        return CreatePostPayload(post=post)

Subscriptions

import asyncio
from typing import AsyncGenerator

@strawberry.type
class Subscription:
    @strawberry.subscription
    async def post_created(self, info: strawberry.types.Info) -> AsyncGenerator[Post, None]:
        async with info.context.pubsub.subscribe("posts") as sub:
            async for event in sub:
                yield event

Gives 0 of the 12 instructions most apis services skills give in 666 tokens

Counted across 424 of the 426 authors here whose files we hold, read 2026-08-06

use plural nouns for resource namesin 41 of 424, across 32 files
use cursor-based pagination for large datasetsin 35 of 424, across 20 files
include rate limit headers in responsesin 25 of 424, across 13 files
Use kebab-case for multi-word resourcesin 23 of 424, across 13 files
version APIs in the URL pathin 19 of 424, across 9 files
use semantic HTTP status codesin 18 of 424, across 8 files
verify webhook signaturesin 18 of 424, across 11 files
use query parameters for filteringin 17 of 424, across 6 files
use async database operationsin 14 of 424, across 7 files
wrap successful responses in a data fieldin 13 of 424, across 3 files
prefix sorting parameters with a hyphen for descending orderin 13 of 424, across 3 files
set appropriate HTTP status codesin 13 of 424, across 6 files

Said here and by no other author read

Define schema using strawberry decorators
Return exceptions for missing DataLoader keys
Store loaders on request context
Define separate input classes for mutations
Implement subscriptions as async generators
Subscribe to pubsub channels for subscriptions

Grouped from the skills themselves: near-identical wordings counted once, and counted by distinct author, so one author publishing three of these counts once. Length counted with cl100k_base; the agent that loads this file may tokenize it differently.