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feat(course): audit fixes and twelve extensions (Modules 7b, 12, 13)

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Audit pass:
- Frame rule counts frames since the last move, so every step lasts
  exactly movesEvery(score) frames, also right after a speed-up
- clampTime + MAX_GAP_MS: a hidden tab no longer replays the whole gap
- Pong Restart keeps held keys
- Fact corrections (mulberry32 output coverage, Haskell IO, uniform)
- New fixture cases from a mutation analysis

Extensions (all three tracks, shared fixtures, course text):
- Turn queue (Exercise 10.6), persisted high score (10.7),
  replay viewer (10.8), play() end-to-end helper (9.5)
- Optional State (4.7) and optional Module 7b, stack-safe IO
- Module 12, property-based testing with generators, shrinking,
  invariants and a model-based oracle
- Module 13, Conway's Life with a Click event
- JS type checking via jsconfig, JSDoc and types.d.ts
- Maintainer tools: scripts/mutate.mjs, scripts/typecheck-js.sh,
  Playwright end-to-end suite (e2e/, scripts/e2e.sh)

Docs: docs/contract.md is the canonical contract; specs and build log
under docs/superpowers.

Verified: JS 728, Scala 689, F# 691 unit tests; stubs and progression
M01-M13 and M07b; 176 end-to-end tests on Chromium and WebKit.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
This commit is contained in:
Lucas WintherandClaude Fable 5.2 committed 2026-11-11 12:05:29 +01:00
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commit edd57f0148
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fixtures/m12-violations.json
+756
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{
"function": "violations",
"cases": [
{
"name": "a-sane-state-has-no-violations",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": []
},
{
"name": "no-apple-is-fine",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": null,
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": []
},
{
"name": "a-pending-perpendicular-turn-is-fine",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Up",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": []
},
{
"name": "a-one-cell-snake-is-fine",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 0,
"y": 0
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": []
},
{
"name": "a-game-over-state-can-be-sane",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 4,
"y": 2
},
{
"x": 3,
"y": 2
},
{
"x": 2,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "GameOver",
"frame": 0,
"queued": null
}
],
"expected": []
},
{
"name": "empty-snake",
"args": [
{
"width": 5,
"height": 5,
"snake": [],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-not-empty"
]
},
{
"name": "head-off-the-right-edge",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 5,
"y": 2
},
{
"x": 4,
"y": 2
},
{
"x": 3,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-in-bounds"
]
},
{
"name": "tail-above-the-board",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 1,
"y": 1
},
{
"x": 1,
"y": 0
},
{
"x": 1,
"y": -1
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-in-bounds"
]
},
{
"name": "head-on-its-own-body",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 2,
"y": 3
},
{
"x": 1,
"y": 3
},
{
"x": 1,
"y": 2
},
{
"x": 2,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-no-overlap"
]
},
{
"name": "snake-with-a-gap",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 3,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-connected"
]
},
{
"name": "snake-with-a-diagonal-step",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 1
},
{
"x": 0,
"y": 1
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-connected"
]
},
{
"name": "apple-outside-the-board",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 5,
"y": 0
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"apple-in-bounds"
]
},
{
"name": "apple-on-the-head",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 2,
"y": 2
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"apple-not-on-snake"
]
},
{
"name": "apple-on-the-tail",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 0,
"y": 2
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"apple-not-on-snake"
]
},
{
"name": "pending-turn-straight-back",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Left",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"turn-not-reversed"
]
},
{
"name": "pending-turn-straight-back-vertical",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Up",
"nextDir": "Down",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"turn-not-reversed"
]
},
{
"name": "several-violations-are-listed-in-order",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 5,
"y": 2
},
{
"x": 3,
"y": 2
},
{
"x": 3,
"y": 2
}
],
"dir": "Right",
"nextDir": "Left",
"apple": {
"x": 3,
"y": 2
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-in-bounds",
"snake-no-overlap",
"snake-connected",
"apple-not-on-snake",
"turn-not-reversed"
]
},
{
"name": "doubled-cell-counts-as-overlap-and-as-disconnected",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 2,
"y": 2
}
],
"dir": "Right",
"nextDir": "Right",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": null
}
],
"expected": [
"snake-no-overlap",
"snake-connected"
]
},
{
"name": "a-queued-turn-is-fine",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Up",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": "Left"
}
],
"expected": []
},
{
"name": "queued-turn-straight-back-from-the-pending-turn",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Up",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": "Down"
}
],
"expected": [
"queued-not-reversed"
]
},
{
"name": "reversed-pending-turn-and-reversed-queue-are-both-listed",
"args": [
{
"width": 5,
"height": 5,
"snake": [
{
"x": 2,
"y": 2
},
{
"x": 1,
"y": 2
},
{
"x": 0,
"y": 2
}
],
"dir": "Right",
"nextDir": "Left",
"apple": {
"x": 4,
"y": 4
},
"seed": 0,
"score": 0,
"status": "Playing",
"frame": 0,
"queued": "Right"
}
],
"expected": [
"turn-not-reversed",
"queued-not-reversed"
]
}
]
}