Let the engine hunt bugs for you — bot playtesting via hearth sweep. Seeded bot policies (mash/idle/wander/seek) play a scene headlessly across many seeds and report softlocks, crashes, stuck states, and unmet objectives as a compact evidence report; objectives double as executable acceptance criteria; a failing seed bakes into a permanent regression playtest. Load after any gameplay change, when a bug is reported (sweep for a deterministic repro seed before debugging), and before calling a level "done".
How to install hearth-playtest?
echoo19/hearth/hearth-playtest
$npx -y skills add echoo19/hearth --skill hearth-playtestInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/echoo19/hearth" --skill "echoo19/hearth/hearth-playtest"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/echoo19/hearth" that are relevant to the current task. Run `npx skills add "https://github.com/echoo19/hearth"` and select the relevant skills, then follow their instructions.
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