Claude 3.5 Sonnet Real-Time Voice Turn Orchestrator (WebRTC & LiveKit)
Real-time conversational voice prompt for Claude 3.5 Sonnet. Enforces concise 1-sentence turns, natural conversational fillers, barge-in interruption handling, and speech rhythm markers.
Parametric Customizer & Compiler Live Tool
Adjust the variables below. The prompt code and API payload update dynamically in real time.
Personality, voice style, and demeanor
Business context for spoken conversation
Goal of the phone dialogue
You are a Real-Time Conversational Voice Agent powered by Claude 3.5 Sonnet, operating over a low-latency WebRTC audio stream.
### CONVERSATIONAL VOICE INVARIANTS:
1. **Sentence Brevity (Strict Rule)**: Never output more than 1 to 2 spoken sentences per turn (maximum 28 words). Voice listeners cannot process paragraphs.
2. **Conversational Markers**: Use natural oral discourse markers ('Got it', 'Right', 'Understood', 'Let me check that') to fill the 200ms prefill window.
3. **Pronunciation & Number Formatting**: Write numbers phonetically or as words ('twenty-five dollars' instead of '$25') to prevent TTS pronunciation artifacts.
4. **Barge-In Resilience**: If the user interrupts mid-sentence, acknowledge the shift immediately without apologizing.
5. **No Markdown Bloat**: Never emit asterisks, bullet points, numbered lists, emojis, or code blocksβthis is spoken audio, not a text screen.
Context Profile:
- **Agent Persona**: {Alex, a warm, highly efficient tier-1 airline reservations specialist}
- **Target Voice Persona / Domain**: {Commercial Airline Flight Rebooking & Seat Upgrades}
- **Primary Workflow**: {Confirm customer identity, look up flight status, and offer upgrade to Economy Plus} Open-source WebRTC infrastructure for real-time multimodal AI voice agents.
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π 3-Step Production Execution Blueprint
How senior engineers and top creators calibrate, customize, and verify this prompt formula in production.
Target Engine Calibration
Drop this prompt into your project root as `.cursorrules` or load it into Claude 3.5 Sonnet / DeepSeek-R1 system instructions.
Dynamic Parameterization
Adjust the dynamic variables (framework, database, and client state) to match your active codebase architecture.
Sanity & Boundary Check
Run a verification query asking the model to declare its architectural constraints before it generates the first line of code.
βοΈ Recommended API Hyperparameter Calibration
Verified 2026 SettingsCALIBRATION INSIGHT: Low temperature ensures deterministic syntax, accurate AST parsing, and zero hallucinated API methods.
πΈ Real Sample Outputs & Verified Results
Visual evidence and benchmark responses generated using this exact prompt formula.
π¬ Prompt Engineering Anatomy
Why this prompt consistently delivers high-tier results: technical parameter breakdown.
Spoken Number Expansion Expanding symbols like '$30' into 'thirty dollars' prevents streaming TTS engines from stuttering or pronouncing symbols incorrectly.
Conversational Fillers Starting turns with brief acknowledgments ('I see that') triggers initial TTS audio playback within 150ms while subsequent tokens generate.
β οΈ Critical Anti-Patterns & Execution Traps
The top 3 engineering mistakes to avoid when deploying this category of prompt into production.
Context Window Flooding
Pasting 50 unminified files into the prompt degrades attention, causing the LLM to ignore core TypeScript rules.
Missing Delimiter Isolation
Letting user instructions mix directly with system rules triggers instruction drift and hallucinations.
Over-Relying on Outdated Paradigms
Allowing the model to use deprecated React 18 patterns (e.g. useEffect for data fetching) creates security vulnerabilities.
π¬ Frequently Asked Questions
Troubleshooting common edge cases, model incompatibilities, and best practices.
How do you achieve sub-500ms voice turn latency?
By pairing Claude 3.5 Sonnet's fast prefill with Silero VAD, Deepgram Nova-2 speech-to-text, and Cartesia or ElevenLabs streaming websocket TTS.
Can Claude invoke tools during a voice call?
Yes, Claude emits background tool calls to look up database records while uttering natural filler phrases to the caller.
π οΈ Recommended Companion Micro-Tools
Complementary client-side tools designed to test, sanitize, or choreograph outputs from this prompt.
Vibe Coding Prompt Architect (.cursorrules Studio)
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Launch Tool β‘System Prompt Security Auditor & Jailbreak Scanner
Scan LLM instructions for prompt injection, persona hijacking, and instruction leaks. Score defense 0-100 and auto-harden in 0ms.
Launch Tool β‘Token & API Cost Calculator
Calculate live token counts & cost comparisons across GPT-4o, Claude 3.5, and DeepSeek-R1 with prompt caching discounts.
Launch Tool β‘Cursor AI & Claude 3.5 Sonnet Pro Bundle
Supercharge your workflow with instant codebase indexing, multi-file edits, and automated system rules.
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