Claude Code Hooks: Make Your Agent Tests Run Every Time

Описание: 🎯 TL;DR: Hooks = "When [event], always do [action]" — no hoping the LLM remembers.

Claude Code hooks are deterministic — they run every time, unlike skills which depend on the LLM choosing to trigger them.

In this episode of our Claude Code tutorial series, we break down Claude Code Hooks : what they are, why they matter, and how they're different from skills.

Hooks let you say: when X happens (like a file edit), automatically run Y (like tests, type checks, or graph validation). That makes them perfect for guardrails, automation, and keeping projects stable as you iterate fast.

We demo hooks inside a real LangGraph research agent project:
Adding hooks that auto-verify the graph still compiles after code edits
Running pytest after node changes
Type checking with mypy on annotated files
Troubleshooting when hooks don't fire as expected
Why hooks beat external automation (they intercept Claude Code's internal events)

We also cover:
Claude Code session resume workflow
Custom slash commands (and the "wrong directory" gotcha)
How fact-checking can fail in subtle ways (and how to tighten it with prompt guardrails)

⚠️ This video includes real debugging (fact-checker date issues, hook troubleshooting). That's intentional — you'll learn more from seeing problems solved than perfect demos.

This project isn't perfect, and that's the point. We're building something functional fast, showing the real workflow, and making it better incrementally.


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📂 *Resources:*
Episode 1: Introduction to Claude Code:    • Build a Claude Code Research Agent: Fact‑C...  
Episode 2: Claude Code Skills:    • Claude Code Skills 2026: Stop Re-Explainin...  
Claude Code Documentation: https://docs.claude.com
LangGraph Docs: https://langchain-ai.github.io/langgr...
Rajath's tool: https://app.paralleluniverse.ai/landing
Rajath's Channel:    / @neuraltalk  
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