Wei Zhang razhangwei

Awesome — we’ll cover the .github/ folder from a reader’s POV: what it is, how it changes what you see on GitHub, and how to quickly make sense of it in any repo.

What the .github/ folder is • Purpose: holds GitHub-specific config (templates, automation, repo metadata). It doesn’t ship in packages or affect runtime code. • Scope: affects issues, PRs, Discussions, security disclosures, CI (GitHub Actions), and repo presentation.

How it changes your experience • Issues/PRs: you’ll see structured forms or prefilled text when opening issues/PRs. • Automation: PRs may auto-label, auto-assign reviewers, run checks/tests, or block merges. • Docs & policies: contribution rules, code of conduct, and security reporting paths show up in dedicated UI entries.

Great question 👍. A pyproject.toml file looks intimidating at first, but it’s just a TOML-formatted config. The trick is to know the sections that matter.

⸻

How to Read a pyproject.toml

Build system

[build-system] requires = ["setuptools>=61.0"]

Category	File / Directory	Purpose
Configuration & Build	`.gitignore`	Specifies files/folders Git should ignore.
Configuration & Build	`.pre-commit-config.yaml`	Defines linting/formatting hooks for pre-commit.
Configuration & Build	`.pylintrc`	Config file for pylint (style/linting rules).
Configuration & Build	`tox.ini`	Automates testing across multiple environments.
Configuration & Build	`pyproject.toml`	Defines packaging, dependencies, and build system.
Configuration & Build	`Dockerfile`	Provides containerized build/runti

process isolation
For Linux and WSL.

Async, cloud-based AI agent.

Concepts:

environment

vs Claude Code

How can I find the model implementation for a particular model?

Usually it's avaiable from transformers/models/xxxx, e.g., for qwen2_5_vl

Personal Website Tech Stack Cheatsheet

Core Technologies

Technology	Version	Purpose
Next.js	14.2.0	React framework with file-based routing, static site generation
React	18.2.0	UI library for component-based development
TypeScript	5.3.3	Static type-checking for JavaScript
TailwindCSS	3.4.1	Utility-first CSS framework

The Walrus Operator in Python: A Comprehensive Guide

The walrus operator (:=) was introduced in Python 3.8 as part of PEP 572. It's officially called the "assignment expression" operator, but it earned its nickname because := resembles a walrus with tusks when viewed sideways. This operator allows you to assign values to variables as part of an expression, rather than as a separate statement.

Basic Syntax and Purpose

The syntax is:

variable := expression

	#!/bin/bash

	# === Cache Cleanup Script ===
	# Cleans caches for Homebrew, UV, Hugging Face, and NPM
	# Usage: bash cleanup.sh [options]
	# Options:
	# -a, --all Clean all caches
	# -b, --brew Clean Homebrew cache
	# -u, --uv Clean UV cache
	# -h, --huggingface Clean Hugging Face cache

	from typing import List, Tuple, Optional, Union, Callable
	import numpy as np

	# Define a Tensor type for clarity in this pseudocode
	Tensor = np.ndarray # In real implementation, this would be a framework-specific tensor type

	# Qwen2.5-VL Vision Encoder Pseudocode

	class Qwen25VisionEncoder:
	def __init__(self,