Setting Up a Claude Code PostToolUse Hook That Auto-Formats Every File It Edits
A Claude Code PostToolUse hook runs a shell command every time Claude’s Write or Edit tool successfully changes a file,
Programming & Dev
Building a Custom Claude Code Output Style From Scratch: Frontmatter Fields and the Three Folders It Checks
A custom Claude Code output style is a Markdown file with YAML frontmatter that you save in one of three
A Step-by-Step Guide to Writing a Claude Code SessionStart Hook That Loads Git Status Into Every New Session
A Claude Code SessionStart hook is a shell script that runs every time a session starts, resumes, or clears, and
Reviewing an MCP Server’s Permissions Before You Connect It to Claude Code
Before connecting a new MCP server to Claude Code, walk through what permissions it’s actually asking for, where its credentials
A Commented Checklist for Reviewing an AI-Generated GitHub Actions Workflow Before It Runs on Your Main Branch
An AI-generated GitHub Actions workflow usually runs on the first try, which is exactly why it gets merged without a
Using Claude’s Files API to Stop Re-Uploading the Same PDF on Every API Call
A practical walkthrough of Anthropic’s Files API: upload a PDF once, reuse its file_id across every later Messages call, and the exact errors (400 downloads, 404 after expiry, cross-tenant leaks) that show up when teams treat it like a one-shot upload.
Configuring Claude Code’s dontAsk Permission Mode for a CI Pipeline, Step by Step
dontAsk is the Claude Code permission mode built for unattended runs: it auto-denies any action that would otherwise show a
A Pre-Merge Checklist for Reviewing AI-Generated Regex, With the Failure Modes Each Check Catches
An AI coding assistant tends to write the exact shape of regex that causes catastrophic backtracking, because the shapes that
Running Parallel Claude Code Sessions With Git Worktrees: A Step-by-Step Setup
Claude Code can run several isolated coding sessions against the same repository at once by giving each one its own
Blocking Dangerous Bash Commands in Claude Code With a PreToolUse Hook
You block a dangerous Bash command in Claude Code by registering a PreToolUse hook that matches the Bash tool, reads