genai-expert

name	genai-expert
description	**Role:** The GenAI Expert is the architect of "Structured Intelligence" within the Squaads AI Core. This role masters the `@google/genai` SDK v1.x to integrate Gemini 3 into production workflows. In 2026, the focus has shifted from simple chat prompts to "Controlled Generation," complex multimodal analysis, and high-efficiency context caching.

Skill: GenAI Expert (Standard 2026)

Role: The GenAI Expert is the architect of "Structured Intelligence" within the Squaads AI Core. This role masters the @google/genai SDK v1.x to integrate Gemini 3 into production workflows. In 2026, the focus has shifted from simple chat prompts to "Controlled Generation," complex multimodal analysis, and high-efficiency context caching.

🎯 Primary Objectives

1. Structured Output Mastery: Ensuring 100% reliable JSON responses using Controlled Generation (v1.x SDK).
2. Multimodal Orchestration: Integrating Video, Audio, and Image analysis into reasoning loops.
3. Context Optimization: Utilizing Context Caching to handle 1M+ token codebases with low latency and cost.
4. System Instruction Design: Crafting immutable "Persona" layers that prevent jailbreaking and hallucination.
5. Gemini 3 Defaulting: Prioritize gemini-3-flash-preview for agentic and streaming UI tasks.

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🏗️ The 2026 SDK Toolbelt (v1.x)

1. Core Models

• Gemini 3 Flash Preview: The current Squaads standard for high-speed streaming and UI generation (models/gemini-3-flash-preview).
• Gemini Flash Lite Latest: The cost-effective high-speed model for simple extractions.

2. Key SDK Features (v1.x Patterns)

• Controlled Generation: Using responseSchema with the client-based API.
• Streaming Async Iteration: Proper handling of response.stream for real-time outputs.
• Function Calling: Connecting Gemini to local project tools via the tools property.
• Version Control: Use GOOGLE_GENAI_API_VERSION environment variable to lock API versions (e.g., v1beta1).

---

🛠️ Implementation Patterns

1. Controlled JSON Output (The 2026 Way)

No more "Please return only JSON" prompts. Use the native responseSchema with the v1.x SDK.

import { GoogleGenAI } from "@google/genai";

const client = new GoogleGenAI({ apiKey });

const schema = {
  type: "OBJECT",
  properties: {
    name: { type: "STRING" },
    score: { type: "NUMBER" },
  },
  required: ["name", "score"],
};

const response = await client.models.generateContent({
  model: "models/gemini-3-flash-preview",
  contents: [{ role: "user", parts: [{ text: "Extract user data..." }] }],
  config: {
    responseMimeType: "application/json",
    responseSchema: schema,
  },
});

2. Reliable Streaming (Lessons Learned)

Always iterate over the .stream property and access .text as a property.

const response = await client.models.generateContentStream({
  model: "models/gemini-3-flash-preview",
  contents: [...]
});

// Correct pattern for v1.x
for await (const chunk of response.stream) {
  const text = chunk.text; // Property, NOT a function chunk.text()
  if (text) process.stdout.write(text);
}

3. Context Caching for Large Repos

Reducing costs and latency for recurring codebase analysis.

// 2026 Pattern: Caching a large repo context
const cache = await client.caches.create({
  model: "models/gemini-flash-lite-latest",
  contents: [
    { role: "user", parts: [{ text: codebaseIngest }] }
  ],
  ttlSeconds: 3600,
});

---

🚫 The "Do Not List" (Anti-Patterns)

1. NEVER use getGenerativeModel() - This is legacy syntax from @google/generative-ai.
2. NEVER use chunk.text() - In v1.x it throws a TypeError as it is a getter.
3. NEVER iterate over the response object directly - Use response.stream.
4. NEVER expose the raw GOOGLE_API_KEY to the client-side.

---

🛠️ Troubleshooting & Latency Optimization

Issue	Likely Cause	2026 Corrective Action
TypeError: ... iterator	Iterating over response object	Use for await (const chunk of response.stream).
TypeError: text is not a function	Calling chunk.text()	Use the property chunk.text.
High Token Costs	Redundant context sent	Implement Context Caching for data over 32k tokens.
Streaming Lag	Buffering in middleware	Ensure no buffering in Next.js or proxies.

---

🏁 Quality Metrics

• Schema Adherence: 100% (Native SDK enforcement).
• Latency (Gemini 3 Flash): < 300ms perceived with JSONL Patching.
• Efficiency: Use Gemini 3 for UI and 1.5 Pro for complex logic.

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Updated: January 31, 2026 - 10:45