Built on Google Gemini | Google AI Studio Hackathon 2026
Captain Cool is an agentic AI system that thinks like an IPL captain — making real-time tactical decisions the way Dhoni, Rohit, or Hardik would. Powered entirely by the Google Gemini stack with 4 named agents that genuinely debate before committing to a call.
- 🎯 4 named Gemini agents that genuinely debate before committing to a call — not a single prompt wearing 4 hats
- 🧊 Captain Persona Selector — pick Dhoni (calm & calculated), Rohit (aggressive), or Hardik (instinctive)
- 🌐 Live match scraping via Gemini's URL context tool — paste a Cricbuzz URL, no manual input needed
- ⚔️ Real agent debate shown in UI — Strategist proposes → Devil's Advocate challenges → Strategist defends
- 📊 Counterfactual analysis — "If you'd bowled X instead, win probability drops ~11%"
- 🎙️ Voice commentary — Commentator speaks the final call aloud via Web Speech API
- 🔴 Confidence score — visual badge per decision (green >7, yellow 5–7, red <5)
User Input (Cricbuzz URL or manual match state)
↓
Orchestrator
┌───────────────────────────────────────┐
│ Agent 1: Stats Analyst │ ← Google Search tool call (live player stats)
│ Agent 2: Strategist (persona-driven) │ ← Proposes tactical decision
│ Agent 3: Devil's Advocate │ ← Challenges the call hard
│ Agent 4: Commentator │ ← Harsha Bhogle-style output + counterfactual
└───────────────────────────────────────┘
↓
Final Decision + Debate UI + Voice Output
| Agent | Role | System Prompt Summary |
|---|---|---|
| Stats Analyst | Data & Tool Use | Analyzes pitch, dew, bowler economy, batter weaknesses. Uses Google Search to fetch live player form. Outputs structured JSON with win probability. |
| Strategist (Dhoni) | Decision Maker | "Ice in your veins. Back your bowlers, never panic, always think 2 overs ahead. Make ONE decisive call." |
| Strategist (Rohit) | Decision Maker | "Bold and aggressive. Back your instincts and your big hitters. Make the attacking call others won't." |
| Strategist (Hardik) | Decision Maker | "Unconventional and fearless. Make the call that surprises everyone but works." |
| Devil's Advocate | Challenger | "Challenge the Strategist's decision hard. Find the flaw. Propose a specific alternative. Be direct." |
| Commentator | Final Output | Harsha Bhogle-style explanation with counterfactual and confidence score out of 10. |
1. Extract match state from Cricbuzz URL (Gemini URL context) or manual form
2. Stats Analyst → structured JSON with win probability
3. Strategist (selected persona) → proposed tactical decision
4. Devil's Advocate → challenge + alternative
5. Strategist → final defended decision
6. Commentator → cricket-language output + counterfactual + confidence score + voice
Input:
- MI vs CSK, 2nd innings, over 16, CSK need 34 off 24, 4 wickets down
- Rohit Sharma on strike (67*), Jadeja non-striker (12*)
- Bumrah has 2 overs left, Chahal has 1, flat pitch, heavy dew, Wankhede
Stats Analyst: Win prob MI 58% / CSK 42%. Dew negating seam movement. Jadeja vulnerable to pace outside off.
Strategist (Dhoni mode): Bowl Bumrah now — back him to nail yorkers despite dew.
Devil's Advocate: Dew renders Bumrah's seam useless. Save him for over 19. Bowl Chahal while Jadeja is on strike.
Strategist (final): Conceded the point. Chahal to bowl over 17.
Commentator: "In dew-heavy Wankhede, Bumrah's famous seam is rendered ineffective. Rohit holds him back for the 19th — smart, calculated captaincy. Confidence: 8/10. If they'd bowled Bumrah here, win probability drops to 51%." 🎙️
| Layer | Technology |
|---|---|
| Frontend | TypeScript + Vite + CSS |
| AI Model | Google Gemini 2.5 Flash |
| SDK | @google/genai |
| Tool Use | Gemini built-in Google Search |
| Voice Output | Web Speech API |
| Build Environment | Google AI Studio |
Prerequisites: Node.js
# 1. Clone the repo
git clone https://github.com/uddhav05-cyber/Captain-Cool-tactic-decisiodecision-
cd Captain-Cool-tactic-decisiodecision-
# 2. Install dependencies
npm install
# 3. Add your Gemini API key
cp .env.example .env.local
# Edit .env.local → set GEMINI_API_KEY=your_key_here
# 4. Run
npm run devGet your free Gemini API key at aistudio.google.com
/src
/agents ← 4 agent definitions + system prompts
/components ← AgentDebate, CaptainSelector, MatchInput, FinalDecision
/lib ← Gemini client, orchestrator logic
index.html
server.ts
vite.config.ts
.env.example
- 🤖 View in AI Studio
- 📝 Dev.to Blog ← add after publishing
- 👤 Built by Uddhav Bhople — Microsoft Learn Student Ambassador | Google Student Ambassador | B.Tech AI/ML @ D.Y. Patil University Pune
Cricket is a captain's game. Built on Gemini. 🏆