Entry 004 - The move is the attack
Taking away the dual-slot turn and making the move the attack again - and how the sim found the degenerate line in a single afternoon, twice, before a human could.
Dev Diary
Contemporaneous notes on building Sibyl - design decisions, mechanic experiments, what the balance sim turns up, and the occasional milestone.
Entry 003 - The locked exit
The two-stage turn unlocked real depth-2 search - then a kill-incentive loop softlocked the bot 50/50 until one gated boolean fixed it. Plus how the two-agent design loop actually runs.
Entry 002 - Nine moves to the exit
A week after locking the name, the engine plays itself end to end: nine byte-identical inputs to the exit on seed 0xc0ffee - and an honest accounting of how little game there is yet.
Entry 001 - Why this exists
Why I'm keeping a contemporaneous record of building Sibyl - a devlog about an engine that plays itself ten thousand times before a human sees it, not about art.