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Yard #4 is live. Voting opens Fri, Oct 9 · 18:00 UTC.
See all 14 builds →// Demo
Watch demo ↗// The build
Errata turns your Claude Code and Codex session logs into a card run. Every monster is a pattern from your own history: the command you retried four times, the moment you stopped the agent and said "no, only this file". Every card is a rule. Your deck IS your global CLAUDE.md and AGENTS.md, with a token budget, duplicates to fuse at the campfire, and a boss that replays the cases you held back. Apply writes the files with byte-exact backups and Undo. Nothing leaves the tab.
// Repo timing
// Model
Claude Opus 5.5 and Fable 5.1, GPT-6.1 Sol and Astra · via an editor or coding agent (Cursor, Claude Code…)
Declared by @therotobo
Model use is declared, not detected. Hackyard cannot verify which model wrote code and does not claim to. A receipt shows a session existed, it does not prove that model wrote what shipped, and most builders won't attach one. Treat it as context, the same as commit dates.
// Notes from the yard
Notes open when voting closes, Sun, Oct 11 · 22:00 UTC. Then anyone can leave @therotobo a note.
// Repo timing
Repo created during the build window
Repo creation date comes from GitHub and can't be altered by the author. Commit dates can be rewritten, so treat them as context rather than proof. Build window: Mon, Oct 5 · 18:00 UTC → Fri, Oct 9 · 18:00 UTC.