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LIGHTCONE · AI coverage organised as a matrix of capability × stage. Not sorted by tool, but by where you are right now.
Updated every Wednesday
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Build with the API

Step-by-step tutorials for developers using Python, the Gemini API, Vertex AI, LangChain, function calling, structured output, and production integrations. Focused on the smallest working examples and real setup friction.

Narrow by stage in the capability matrix → 5 results
Building a Simple Retrieval-Augmented Gemini App Build with the API
Build with the API Oct 07, 2026

Building a Simple Retrieval-Augmented Gemini App

A practical two-pass Gemini workflow for turning customer interview notes into defensible produc...
Connecting Gemini to LangChain Without Hiding the Important Parts Build with the API
Build with the API Oct 06, 2026

Connecting Gemini to LangChain Without Hiding the Important Parts

How to integrate Gemini with LangChain while keeping model choice, prompts, tool validation, and...
Your First Gemini API Request in Python Build with the API
Build with the API Oct 03, 2026

Your First Gemini API Request in Python

A complete beginner tutorial for making the first Gemini API request in Python, covering setup, ...
Environment Variables, API Keys, and the Security Mistakes Beginners Make Build with the API
Build with the API Oct 02, 2026

Environment Variables, API Keys, and the Security Mistakes Beginners Make

Practical guidance on storing and loading Gemini API keys safely, covering the most common begin...
Structured JSON from Gemini with Validation and Retry Logic Build with the API
Build with the API Sep 30, 2026

Structured JSON from Gemini with Validation and Retry Logic

A production-minded pattern for obtaining structured JSON from Gemini: define the schema in code...