Jeffrey's Blog https://jeffrey.blog/ Jeff Sylvan's engineering record for the Black Skies architecture: diagrams, benchmarks, and published falsifiers. en-us 10,000 Players, No Time Dilation https://jeffrey.blog/articles/no-time-dilation.html https://jeffrey.blog/articles/no-time-dilation.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) Why consistency versus availability is a design choice, and how game rules become scaling decisions. The hub of the series. The Life of a Tile https://jeffrey.blog/articles/life-of-a-tile.html https://jeffrey.blog/articles/life-of-a-tile.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) Born by spiral search and CAS, failing over in one to two ticks, garbage-collecting itself. There is no tile manager. Redis Coordination for Real-Time Tile State https://jeffrey.blog/articles/commit-path.html https://jeffrey.blog/articles/commit-path.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) One Redis function per tick, a bridge, and a checkpointer keep commit, delivery, and durability from ever coupling. Split-Brain Resolution Without a Global Coordinator https://jeffrey.blog/articles/ownership.html https://jeffrey.blog/articles/ownership.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) Epoch fencing, split-brain resolution, and why the routing read path never touches the database. Delivering One Battle to 10,000 Clients https://jeffrey.blog/articles/delivery.html https://jeffrey.blog/articles/delivery.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) One write becomes ten thousand correct screens inside 100 milliseconds, and the 600-byte assumption that carries it all. Motion Across Boundaries https://jeffrey.blog/articles/motion-across-boundaries.html https://jeffrey.blog/articles/motion-across-boundaries.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) Authority moving between CP islands in two ticks, combat at the seam, and mass warp as a queue instead of a protocol. The Substrate Tiles Never Think About https://jeffrey.blog/articles/substrate.html https://jeffrey.blog/articles/substrate.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) Leases instead of scheduling, arithmetic instead of forecasting, three speeds of refill, and Lambda as a bridge. What Still Needs Load Testing https://jeffrey.blog/articles/ledger.html https://jeffrey.blog/articles/ledger.html Fri, 03 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) The full benchmark table, the two SLIs that define correctness, and exactly what would falsify the design. The blocking task https://jeffrey.blog/articles/the-blocking-task.html https://jeffrey.blog/articles/the-blocking-task.html Sun, 05 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) Agents replaced the hands. Nothing replaced the coordination layer. Why plan freshness, not code generation, is the blocking task for a solo founder. A reconciliation kernel for development work https://jeffrey.blog/articles/reconciliation-kernel.html https://jeffrey.blog/articles/reconciliation-kernel.html Sun, 05 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) A control loop over a plan graph: two loops decoupled by a queue, epoch fencing reused from Black Skies, and gates that consume evidence, not vibes. The toil pattern catalog https://jeffrey.blog/articles/toil-pattern-catalog.html https://jeffrey.blog/articles/toil-pattern-catalog.html Sun, 05 Jul 2026 12:00:00 GMT jeffrey.sylvan@gmail.com (Jeffrey Sylvan) Recurring manual interventions written as trigger, policy, verification. Real counts or nothing: every entry waits on its baseline week.