[open Source]echo Mode – a Middleware to Stabilize LLM Tone and Persona Drift
Posted3 months ago
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The post introduces Echo Mode, an open-source middleware to stabilize LLM tone and persona drift, with a single comment discussing its potential applications.
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Oct 7, 2025 at 3:55 PM EDT
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It works as a finite-state protocol (Sync / Resonance / Insight / Calm), maintaining consistent conversational “state” across turns. Under the hood it tracks a Sync Score (think BLEU for tone) and uses EWMA drift detection + repair loops to restore consistency.
Written in TypeScript, works with OpenAI, Anthropic, Gemini, and other APIs. The OSS version is free under Apache-2.0, and part of a larger system we’re developing at EchoMode.io to provide enterprise-grade tone stability.
GitHub: https://github.com/Seanhong0818/Echo-Mode
Would love feedback from others building long-context or multi-agent frameworks.