chore: keep the fixture generator scripts and the replay-sample bot

scripts/fixtures/ holds the scripts that produced the 2026-11-11
fixtures, with a README on running them safely into a copy. Run in
order they reproduce the content of every fixture they touch.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

scripts/fixtures/m12-violations-queue-cases.mjs

@@ -0,0 +1,20 @@
+import fs from 'node:fs'
+// Fixture regeneration aid (see scripts/fixtures/README.md). Written during the 2026-11-11 build, kept for reference.
+// Writes into fixtures/ unless FIXTURES_OUT names another directory (with a trailing slash).
+const FIX = process.env.FIXTURES_OUT ?? new URL('../../fixtures/', import.meta.url).pathname
+const SOL = new URL('../../js/solutions/', import.meta.url).href
+const HERE = new URL('./', import.meta.url).pathname
+const { violations } = await import(SOL + 'check.js')
+const f = FIX + 'm12-violations.json'
+const fx = JSON.parse(fs.readFileSync(f, 'utf8'))
+const sane = fx.cases.find((c) => c.name === 'a-pending-perpendicular-turn-is-fine').args[0]
+console.log(JSON.stringify(sane))
+const mk = (name, patch) => { const s = { ...sane, ...patch }; return { name, args: [s], expected: violations(s) } }
+const cases = [
+  mk('a-queued-turn-is-fine', { dir: 'Right', nextDir: 'Up', queued: 'Left' }),
+  mk('queued-turn-straight-back-from-the-pending-turn', { dir: 'Right', nextDir: 'Up', queued: 'Down' }),
+  mk('reversed-pending-turn-and-reversed-queue-are-both-listed', { dir: 'Right', nextDir: 'Left', queued: 'Right' }),
+]
+cases.forEach((c) => console.log(c.name, JSON.stringify(c.expected)))
+const names = new Set(cases.map((c) => c.name))
+fs.writeFileSync(f, JSON.stringify({ ...fx, cases: [...fx.cases.filter((c) => !names.has(c.name)), ...cases] }, null, 2) + '\n')