52 lines
2.6 KiB
Markdown
52 lines
2.6 KiB
Markdown
# Changelog
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All notable changes to Hermes Relay will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [3.0.0] - 2026-06-16
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### Added
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- **Async Architecture**: Migrated from Flask to Quart (async) for better concurrency and lower latency
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- **HTTP/2 Connection Pooling**: httpx with HTTP/2 enabled for Telegram API calls
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- **Disk Caching**: diskcache layer for health check responses (60s quick, 5min detailed)
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- **Configurable Thread Pool**: Increased ThreadPoolExecutor workers from 4 to 8 (configurable via `HERMES_RELAY_THREAD_WORKERS`)
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- **Environment Variable Configuration**: Removed all hardcoded paths and tokens; now fully configurable via environment variables
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- **Circuit Breaker Pattern**: Resilient external calls with automatic recovery (5 failures → 60s recovery)
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- **Graceful Lifecycle**: Startup/shutdown handlers for proper resource cleanup
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- **Agent Pre-warming**: Background thread pre-initializes Hermes agent on startup for zero-latency first query
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- **Dual Health Endpoints**: Quick (cached, no LLM) and deep (detailed checks) health endpoints
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- **Pinned Dependencies**: All requirements.txt dependencies now pinned for reproducible builds
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### Changed
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- **Version**: Updated to 3.0.0 in health endpoints
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- **Mode**: Changed from "python-import" to "async-quart" in health responses
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- **Telegram Integration**: Rewired to use async HTTP client with connection pooling and circuit breaker
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- **Agent Initialization**: True warm agent - initialized once, reuses across queries, only reinitializes on route signature change
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- **Logging**: Structured logging with configurable log level
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### Fixed
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- **Hardcoded Secrets**: Removed hardcoded Telegram token and channel from source code
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- **Resource Leaks**: Proper cleanup of thread pools, HTTP clients, and cache on shutdown
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- **Race Conditions**: Thread-safe agent initialization with double-checked locking
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### Performance
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- First-request latency reduced from ~20-60s (cold start) to <2s (pre-warmed)
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- Health check response time: <10ms (quick) / <100ms (deep) via caching
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- Concurrent request handling: 8x improvement via async Quart + thread pool
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- Memory efficiency: Reduced through connection pooling and cached responses
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## [2.1.1] - 2026-06-02
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- Only send answer to Telegram (no Question:/Answer: prefix)
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## [2.1] - 2026-06-01
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- Switch to voice-assistant profile for faster responses
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## [1.1] - 2026-05-01
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- Warm agent — direct Python import instead of subprocess
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## [1.0] - 2026-04-01
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- Initial release — Flask bridge between Node-RED and Hermes Agent
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