Living Document Notice
Staged 2026-09-28. Living revisions and interconnected notes live in the Bosun PKM Garden.
Dual-Track Training Telemetry and Parquet Split Sinks
High-frequency athletic performance data—such as power output, GPS coordinates, and stride cadences—exceeds the practical storage capacity of flat Markdown notes. Tactician utilizes a dual-track architecture, storing qualitative coaching notes in human-readable Markdown while writing high-resolution sensor streams to local Parquet files.
Telemetry Invariants
- Summary Frontmatter Metrics: Markdown frontmatter captures high-level session metadata, duration, distance, and normalized power output.
- Columnar Split Sinks: Detailed interval split metrics and second-by-second telemetry serialize directly into partitioned Parquet sinks.
- Local OLAP Queries: Analytical speed and power profiling run locally via high-performance DuckDB engines.
Dual-track training analytics combine narrative coaching depth with raw computational rigor.
- Directus Target: tactician-blog
- Garden Source Reference: MOC - Tactician Fitness Analytics, MOC - Fleet Operations, LOG-1001 - Append-Only Temporal Logs