[
  {
    "id": "I1",
    "label": "Correct non-final panel input",
    "preconditions": [
      {
        "type": "StatePredicate",
        "entity": "Expected",
        "attribute": "expected",
        "operator": "==",
        "value": {
          "kind": "opaque",
          "description": "panel mapped from the current KeyDown"
        }
      },
      {
        "type": "StatePredicate",
        "entity": "Index",
        "attribute": "index",
        "operator": "<",
        "value": 2
      },
      {
        "type": "StatePredicate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "==",
        "value": "Input"
      },
      {
        "type": "StatePredicate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "==",
        "value": false
      },
      {
        "type": "StatePredicate",
        "entity": "Input",
        "attribute": "keyDown",
        "operator": "==",
        "value": {
          "kind": "opaque",
          "description": "an accepted key-down edge: a discrete key-down (OS key auto-repeat is ignored) that the debounce pre-filter did not drop, i.e. the same physical key had no accepted down within the previous DBT-18 = 40 ms"
        }
      }
    ],
    "trigger": {
      "type": "Event",
      "name": "KeyDown"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Index",
        "attribute": "index",
        "operator": "INCREMENT",
        "value": 1
      },
      {
        "type": "StateUpdate",
        "entity": "Panel",
        "attribute": "state",
        "operator": "SET",
        "value": "CorrectHit"
      },
      {
        "type": "EventEmission",
        "name": "CorrectKeySoundPlayed"
      }
    ],
    "provenance": {
      "mechanic": "I1",
      "gdd_quote": "| I1 | key-down maps to panel `P`, `P == expected[k]`, and `k < 2` | correct: `RT-PANEL` P3 on `P`; `k += 1`; stay in `Input` |",
      "precondition": "key-down maps to panel `P`, `P == expected[k]`, and `k < 2`",
      "action": "Apply I1 under the stated condition and trigger.",
      "expected": "correct: `RT-PANEL` P3 on `P`; `k += 1`; stay in `Input`. `RT-INPUT` — resolves every input event during the `Input` phase, evaluated on each accepted key-down and on the timer tick. Debounce pre-filter, applied before I1–I3: drop a key-down whose same physical key had an accepted down within `DBT-18` = 40 ms. **Input model:** discrete key-down edges only; OS key auto-repeat ignored; per-key debounce `DBT-18`. During gameplay the arrow keys act as panel selects only (menus are not open), so no conflict occurs.",
      "evidence": "Index is set to its prior value plus one and correct-key events fire.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 202,
        "line_end": 202,
        "quote": "| I1 | key-down maps to panel `P`, `P == expected[k]`, and `k < 2` | correct: `RT-PANEL` P3 on `P`; `k += 1`; stay in `Input` |"
      }
    }
  },
  {
    "id": "I2",
    "label": "Correct final panel input",
    "preconditions": [
      {
        "type": "StatePredicate",
        "entity": "Expected",
        "attribute": "expected",
        "operator": "==",
        "value": {
          "kind": "opaque",
          "description": "panel mapped from the current KeyDown"
        }
      },
      {
        "type": "StatePredicate",
        "entity": "Index",
        "attribute": "index",
        "operator": "==",
        "value": 2
      },
      {
        "type": "StatePredicate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "==",
        "value": "Input"
      },
      {
        "type": "StatePredicate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "==",
        "value": false
      },
      {
        "type": "StatePredicate",
        "entity": "Input",
        "attribute": "keyDown",
        "operator": "==",
        "value": {
          "kind": "opaque",
          "description": "an accepted key-down edge: a discrete key-down (OS key auto-repeat is ignored) that the debounce pre-filter did not drop, i.e. the same physical key had no accepted down within the previous DBT-18 = 40 ms"
        }
      }
    ],
    "trigger": {
      "type": "Event",
      "name": "KeyDown"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Index",
        "attribute": "index",
        "operator": "INCREMENT",
        "value": 1
      },
      {
        "type": "StateUpdate",
        "entity": "InputTimeMs",
        "attribute": "input_time_ms",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "the elapsed milliseconds from Input entry (V4) to this third correct key-down, used by the LED-2 speed bonus; the counting of time spent paused during Input toward it is not covered"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Panel",
        "attribute": "state",
        "operator": "SET",
        "value": "CorrectHit"
      },
      {
        "type": "EventEmission",
        "name": "CorrectKeySoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "PatternCleared"
      }
    ],
    "provenance": {
      "mechanic": "I2",
      "gdd_quote": "| I2 | key-down maps to panel `P`, `P == expected[k]`, and `k == 2` | correct final: `RT-PANEL` P3 on `P`; record `input_time_ms`; resolve → `RT-ROUND` RR1 |",
      "precondition": "key-down maps to panel `P`, `P == expected[k]`, and `k == 2`",
      "action": "Apply I2 under the stated condition and trigger.",
      "expected": "correct final: `RT-PANEL` P3 on `P`; record `input_time_ms`; resolve → `RT-ROUND` RR1. `RT-INPUT` — resolves every input event during the `Input` phase, evaluated on each accepted key-down and on the timer tick. Debounce pre-filter, applied before I1–I3: drop a key-down whose same physical key had an accepted down within `DBT-18` = 40 ms. **Input model:** discrete key-down edges only; OS key auto-repeat ignored; per-key debounce `DBT-18`. During gameplay the arrow keys act as panel selects only (menus are not open), so no conflict occurs. **k:** count of correct inputs entered so far this round (0..3). Does not cover the counting of time spent paused during Input toward `input_time_ms`.",
      "evidence": "Input time is stored and correct/clear events fire.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 203,
        "line_end": 203,
        "quote": "| I2 | key-down maps to panel `P`, `P == expected[k]`, and `k == 2` | correct final: `RT-PANEL` P3 on `P`; record `input_time_ms`; resolve → `RT-ROUND` RR1 |"
      }
    }
  },
  {
    "id": "RR1",
    "label": "Resolve cleared pattern",
    "preconditions": [],
    "trigger": {
      "type": "Event",
      "name": "PatternCleared"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Gain",
        "attribute": "gain",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "the LED-2 gain of this clear, computed with the streak value after this rule's +1: speed_bonus = clamp(floor(DBT-20 (50) × (1 − input_time_ms / DBT-14 (4000 ms))), 0, 50); sum = DBT-19 (100) + speed_bonus; streak_mult = clamp(1.0 + DBT-21 (0.1) × (streak − 1), 1.0, DBT-22 (2.0)); gain = floor(sum × streak_mult)"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "Feedback, with the phase banner reading \"CLEAR\", held for the clear hold DBT-15 = 600 ms; then InterGap"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Score",
        "attribute": "score",
        "operator": "SET",
        "value": {
          "expr": "min(score + gain, DBT-23)"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Streak",
        "attribute": "streak",
        "operator": "INCREMENT",
        "value": 1
      },
      {
        "type": "StateUpdate",
        "entity": "GameSession",
        "attribute": "longest_streak",
        "operator": "SET",
        "value": {
          "expr": "max(longest_streak, streak)"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Verdict",
        "attribute": "verdict",
        "operator": "SET",
        "value": "CLEARED"
      },
      {
        "type": "StateUpdate",
        "entity": "Panel",
        "attribute": "state",
        "operator": "SET",
        "value": "ClearCelebrate"
      },
      {
        "type": "EventEmission",
        "name": "PatternClearSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "ClearConfettiVfxPlayedUnlessReducedMotion"
      }
    ],
    "provenance": {
      "mechanic": "RR1",
      "gdd_quote": "| RR1 | Clear (I2) | `streak += 1`; `longest_streak = max(longest_streak, streak)`; `gain = LED-2`; `score = min(score + gain, DBT-23)`; `results[pattern_index] = CLEARED`; `RT-PANEL` P6; banner \"CLEAR\"; clear SFX; hold `DBT-15`; → `InterGap` |",
      "precondition": "Clear (I2)",
      "action": "Apply RR1 under the stated condition and trigger.",
      "expected": "`streak += 1`; `longest_streak = max(longest_streak, streak)`; `gain = LED-2`; `score = min(score + gain, DBT-23)`; `results[pattern_index] = CLEARED`; `RT-PANEL` P6; banner \"CLEAR\"; clear SFX; hold `DBT-15`; → `InterGap`. Pattern clear (`RT-ROUND` RR1) | ascending bell arpeggio C–E–G, bright | green ripple + confetti. clear = green ripple + panel-colored confetti (20 squares, 12 px, `DBT-26` hues, 500 ms). **Reduced Motion:** disables screen shake, bloom, scale tweens, confetti, and the vignette pulse; substitutes rim-width and opacity changes (see Panel card, Round & Run card).",
      "evidence": "Clear state updates and events are produced.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 244,
        "line_end": 244,
        "quote": "| RR1 | Clear (I2) | `streak += 1`; `longest_streak = max(longest_streak, streak)`; `gain = LED-2`; `score = min(score + gain, DBT-23)`; `results[pattern_index] = CLEARED`; `RT-PANEL` P6; banner \"CLEAR\"; clear SFX; hold `DBT-15`; → `InterGap` |"
      }
    }
  },
  {
    "id": "RR2",
    "label": "Resolve wrong-input failure",
    "preconditions": [],
    "trigger": {
      "type": "Event",
      "name": "PatternFailed"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Gain",
        "attribute": "gain",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "Feedback, with the phase banner reading \"MISS\", held for the fail hold DBT-16 = 900 ms; then InterGap"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Streak",
        "attribute": "streak",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "Verdict",
        "attribute": "verdict",
        "operator": "SET",
        "value": "FAILED"
      },
      {
        "type": "StateUpdate",
        "entity": "Panel",
        "attribute": "state",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "WrongHit (RT-PANEL P4) on the wrong panel P that took the key, ExpectedPulse (RT-PANEL P5) on the panel expected[k] that was still needed, and FailDim (RT-PANEL P7: desaturated to 60% gray for the fail hold) on the remaining panel"
        }
      },
      {
        "type": "EventEmission",
        "name": "WrongKeySoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "PatternFailSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "FailVignetteOrBorderVfxPlayed"
      }
    ],
    "provenance": {
      "mechanic": "RR2",
      "gdd_quote": "| RR2 | Fail-wrong (I3) | `streak = 0`; `gain = 0`; `results[pattern_index] = FAILED`; `RT-PANEL` P4 on wrong panel + P5 on `expected[k]`; banner \"MISS\"; buzz SFX; hold `DBT-16`; → `InterGap` |",
      "precondition": "Fail-wrong (I3)",
      "action": "Apply RR2 under the stated condition and trigger.",
      "expected": "`streak = 0`; `gain = 0`; `results[pattern_index] = FAILED`; `RT-PANEL` P4 on wrong panel + P5 on `expected[k]`; banner \"MISS\"; buzz SFX; hold `DBT-16`; → `InterGap`. Pattern fail (`RT-ROUND` RR2/RR3) | short descending minor two-note \"womp\" | fail-dim + red vignette/border. fail = fail-dim + red edge vignette pulse 400 ms (vignette omitted under Reduced Motion, replaced by a static 6 px red screen border).",
      "evidence": "Failure updates and cues are produced.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 245,
        "line_end": 245,
        "quote": "| RR2 | Fail-wrong (I3) | `streak = 0`; `gain = 0`; `results[pattern_index] = FAILED`; `RT-PANEL` P4 on wrong panel + P5 on `expected[k]`; banner \"MISS\"; buzz SFX; hold `DBT-16`; → `InterGap` |"
      }
    }
  },
  {
    "id": "RR3",
    "label": "Resolve timeout failure",
    "preconditions": [],
    "trigger": {
      "type": "Event",
      "name": "Timeout"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Gain",
        "attribute": "gain",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "Feedback, with the phase banner reading \"TIME\", held for the fail hold DBT-16 = 900 ms; then InterGap"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Streak",
        "attribute": "streak",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "Verdict",
        "attribute": "verdict",
        "operator": "SET",
        "value": "FAILED"
      },
      {
        "type": "StateUpdate",
        "entity": "Panel",
        "attribute": "state",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "ExpectedPulse (RT-PANEL P5) on the panel expected[k] that was still needed, and FailDim (RT-PANEL P7) on the other panels"
        }
      },
      {
        "type": "EventEmission",
        "name": "TimeoutSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "PatternFailSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "FailVignetteOrBorderVfxPlayed"
      }
    ],
    "provenance": {
      "mechanic": "RR3",
      "gdd_quote": "| RR3 | Fail-timeout (I5) | `streak = 0`; `gain = 0`; `results[pattern_index] = FAILED`; `RT-PANEL` P5 on `expected[k]` + P7 dim others; banner \"TIME\"; buzz+tick-stop SFX; hold `DBT-16`; → `InterGap` |",
      "precondition": "Fail-timeout (I5)",
      "action": "Apply RR3 under the stated condition and trigger.",
      "expected": "`streak = 0`; `gain = 0`; `results[pattern_index] = FAILED`; `RT-PANEL` P5 on `expected[k]` + P7 dim others; banner \"TIME\"; buzz+tick-stop SFX; hold `DBT-16`; → `InterGap`. Pattern fail (`RT-ROUND` RR2/RR3) | short descending minor two-note \"womp\" | fail-dim + red vignette/border. fail = fail-dim + red edge vignette pulse 400 ms (vignette omitted under Reduced Motion, replaced by a static 6 px red screen border).",
      "evidence": "Timeout-failure updates and cues are produced.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 246,
        "line_end": 246,
        "quote": "| RR3 | Fail-timeout (I5) | `streak = 0`; `gain = 0`; `results[pattern_index] = FAILED`; `RT-PANEL` P5 on `expected[k]` + P7 dim others; banner \"TIME\"; buzz+tick-stop SFX; hold `DBT-16`; → `InterGap` |"
      }
    }
  },
  {
    "id": "I5",
    "label": "Input window timeout",
    "preconditions": [
      {
        "type": "StatePredicate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "==",
        "value": "Input"
      },
      {
        "type": "StatePredicate",
        "entity": "Index",
        "attribute": "index",
        "operator": "<",
        "value": 3
      },
      {
        "type": "StatePredicate",
        "entity": "Timer",
        "attribute": "timer",
        "operator": ">=",
        "value": "DBT-14"
      }
    ],
    "trigger": null,
    "effects": [
      {
        "type": "EventEmission",
        "name": "Timeout"
      }
    ],
    "provenance": {
      "mechanic": "I5",
      "gdd_quote": "| I5 | input-window timer reaches `DBT-14` while `k < 3` | timeout: resolve → `RT-ROUND` RR3 |",
      "precondition": "input-window timer reaches `DBT-14` while `k < 3`",
      "action": "Apply I5 under the stated condition and trigger.",
      "expected": "timeout: resolve → `RT-ROUND` RR3. `RT-INPUT` — resolves every input event during the `Input` phase, evaluated on each accepted key-down and on the timer tick.",
      "evidence": "Observe I5's encoded outcomes.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 206,
        "line_end": 206,
        "quote": "| I5 | input-window timer reaches `DBT-14` while `k < 3` | timeout: resolve → `RT-ROUND` RR3 |"
      }
    }
  },
  {
    "id": "RN1",
    "label": "Advance to next pattern",
    "preconditions": [
      {
        "type": "StatePredicate",
        "entity": "GameSession",
        "attribute": "pattern_index",
        "operator": "<",
        "value": 9
      }
    ],
    "trigger": {
      "type": "Event",
      "name": "InterGapElapsed"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "GameSession",
        "attribute": "pattern_index",
        "operator": "INCREMENT",
        "value": 1
      },
      {
        "type": "StateUpdate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "SET",
        "value": "LeadIn"
      },
      {
        "type": "EventEmission",
        "name": "PatternAdvanceSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "WatchBannerSoundPlayed"
      }
    ],
    "provenance": {
      "mechanic": "RN1",
      "gdd_quote": "| RN1 | `pattern_index < DBT-9 − 1` (i.e., < 9) | `pattern_index += 1`; → `LeadIn` |",
      "precondition": "`pattern_index < DBT-9 − 1` (i.e., < 9)",
      "action": "Apply RN1 under the stated condition and trigger.",
      "expected": "`pattern_index += 1`; → `LeadIn`. `RT-RUN` — routes after `InterGap`; `pattern_index` is the just-resolved index (0..9).",
      "evidence": "Pattern index is set to its prior value plus one and LeadIn is produced.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 254,
        "line_end": 254,
        "quote": "| RN1 | `pattern_index < DBT-9 − 1` (i.e., < 9) | `pattern_index += 1`; → `LeadIn` |"
      }
    }
  },
  {
    "id": "RN2",
    "label": "Complete run and save best",
    "preconditions": [
      {
        "type": "StatePredicate",
        "entity": "GameSession",
        "attribute": "pattern_index",
        "operator": "==",
        "value": 9
      }
    ],
    "trigger": {
      "type": "Event",
      "name": "InterGapElapsed"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "BestDaily",
        "attribute": "best_daily",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "Daily mode only: if last_daily_date differs from today's local date (YYYYMMDD), best_daily is first reset to 0; then, if score > best_daily, best_daily = score, otherwise it keeps its value. In Play mode best_daily is unchanged"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "BestNormal",
        "attribute": "best_normal",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "Play mode only: if score > best_normal, best_normal = score, otherwise it keeps its value. In Daily mode best_normal is unchanged"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "LastDailyDate",
        "attribute": "last_daily_date",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "Daily mode only: set to today's local date (YYYYMMDD) when it differed from it, before the score comparison; otherwise, and in Play mode, unchanged"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "SET",
        "value": "Results"
      },
      {
        "type": "EventEmission",
        "name": "ResultsTallySoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "RunCompleteSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "NewBestSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "NewBestBannerShown"
      },
      {
        "type": "EventEmission",
        "name": "NewBestBellLineSoundPlayed"
      }
    ],
    "provenance": {
      "mechanic": "RN2",
      "gdd_quote": "| RN2 | `pattern_index == DBT-9 − 1` (i.e., == 9) | → `Results`; save best (Save Data) |",
      "precondition": "`pattern_index == DBT-9 − 1` (i.e., == 9)",
      "action": "Apply RN2 under the stated condition and trigger.",
      "expected": "→ `Results`; save best (Save Data). `RT-RUN` — routes after `InterGap`; `pattern_index` is the just-resolved index (0..9). Results shows \"NEW BEST!\" when RN2 updated it. Results \"Tally\" | crossfade 500 ms from Focus on `Results` entry (RN2) | warm electric piano + pad | chord walk C–G–Am–F; if new best, add a bright bell counter-line | 90 BPM, loop. NewBestSoundPlayed (the new-best sparkle), NewBestBannerShown (the \"NEW BEST!\" readout on Results) and NewBestBellLineSoundPlayed (the bright bell counter-line added to the Results Tally BGM) occur only when this Results entry raised the just-played mode's best: score > `best_normal` in Play mode, or score > `best_daily` after any new-day reset in Daily mode.",
      "evidence": "Best values and Results phase are set.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 255,
        "line_end": 255,
        "quote": "| RN2 | `pattern_index == DBT-9 − 1` (i.e., == 9) | → `Results`; save best (Save Data) |"
      }
    }
  },
  {
    "id": "PA1",
    "label": "Pause an active round",
    "preconditions": [
      {
        "type": "StatePredicate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "==",
        "value": false
      },
      {
        "type": "StatePredicate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "IN",
        "value": [
          "LeadIn",
          "Watch",
          "PreInput",
          "Input",
          "Resolve",
          "Feedback"
        ]
      }
    ],
    "trigger": {
      "type": "Event",
      "name": "PauseToggled"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "SET",
        "value": true
      },
      {
        "type": "StateUpdate",
        "entity": "Timer",
        "attribute": "timer",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "frozen: the current phase clock (during Watch, the playback clock and the current cue mid-flash) and the input-window timer stop advancing and keep their current values while paused"
        }
      },
      {
        "type": "EventEmission",
        "name": "PauseOpenSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "PauseMusicDucked"
      }
    ],
    "provenance": {
      "mechanic": "PA1",
      "gdd_quote": "| PA1 | Pause key (Esc keyboard / Start gamepad, Input Map) pressed during a round phase `LeadIn`/`Watch`/`PreInput`/`Input`/`Resolve`/`Feedback`, not paused | freeze current phase clock + input timer; show pause overlay; open SFX |",
      "precondition": "Pause key (Esc keyboard / Start gamepad, Input Map) pressed during a round phase `LeadIn`/`Watch`/`PreInput`/`Input`/`Resolve`/`Feedback`, not paused",
      "action": "Apply PA1 under the stated condition and trigger.",
      "expected": "freeze current phase clock + input timer; show pause overlay; open SFX. pause open = low pad swell; close = reversed swell; BGM ducks −8 dB while paused. Does not cover the combination of this duck with the −12 dB `Watch` duck when the pause begins during `Watch`.",
      "evidence": "Timer is captured and open cue fires.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 322,
        "line_end": 322,
        "quote": "| PA1 | Pause key (Esc keyboard / Start gamepad, Input Map) pressed during a round phase `LeadIn`/`Watch`/`PreInput`/`Input`/`Resolve`/`Feedback`, not paused | freeze current phase clock + input timer; show pause overlay; open SFX |"
      }
    }
  },
  {
    "id": "PA2",
    "label": "Resume paused round",
    "preconditions": [
      {
        "type": "StatePredicate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "==",
        "value": true
      }
    ],
    "trigger": {
      "type": "Event",
      "name": "ResumeRequested"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "SET",
        "value": false
      },
      {
        "type": "StateUpdate",
        "entity": "Timer",
        "attribute": "timer",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "resumed: the phase clock, the current Watch cue and the input-window timer continue from exactly the values frozen at pause, for their remaining time"
        }
      },
      {
        "type": "EventEmission",
        "name": "PauseCloseSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "PauseMusicDuckReleased"
      }
    ],
    "provenance": {
      "mechanic": "PA2",
      "gdd_quote": "| PA2 | Resume chosen (or Pause key while paused) | close overlay; resume the exact frozen clock/cue; close SFX |",
      "precondition": "Resume chosen (or Pause key while paused)",
      "action": "Apply PA2 under the stated condition and trigger.",
      "expected": "close overlay; resume the exact frozen clock/cue; close SFX. pause open = low pad swell; close = reversed swell; BGM ducks −8 dB while paused.",
      "evidence": "Timer is re-established and close cue fires.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 323,
        "line_end": 323,
        "quote": "| PA2 | Resume chosen (or Pause key while paused) | close overlay; resume the exact frozen clock/cue; close SFX |"
      }
    }
  },
  {
    "id": "PA3",
    "label": "Restart current run",
    "preconditions": [],
    "trigger": {
      "type": "Event",
      "name": "RestartRunChosen"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Seed",
        "attribute": "seed",
        "operator": "SET",
        "value": {
          "expr": "new Play seed / same Daily seed"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Draws",
        "attribute": "draws",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "regenerated for the new run: the 30-draw stream (DBT-32, Pattern card) generated from the new run's seed"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "GameSession",
        "attribute": "pattern_index",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "Score",
        "attribute": "score",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "Streak",
        "attribute": "streak",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "GameSession",
        "attribute": "longest_streak",
        "operator": "SET",
        "value": 0
      },
      {
        "type": "StateUpdate",
        "entity": "Verdict",
        "attribute": "verdict",
        "operator": "SET",
        "value": {
          "kind": "opaque",
          "description": "UNPLAYED in every entry of results[0..9]: no pattern of the new run has resolved yet"
        }
      },
      {
        "type": "StateUpdate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "SET",
        "value": false
      },
      {
        "type": "StateUpdate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "SET",
        "value": "LeadIn"
      },
      {
        "type": "EventEmission",
        "name": "GameplayFocusSoundPlayed"
      },
      {
        "type": "EventEmission",
        "name": "PauseMusicDuckReleased"
      }
    ],
    "provenance": {
      "mechanic": "PA3",
      "gdd_quote": "| PA3 | Restart Run chosen | discard current run; new `S0` (same mode, new Play seed / same Daily seed) |",
      "precondition": "Restart Run chosen",
      "action": "Apply PA3 under the stated condition and trigger.",
      "expected": "discard current run; new `S0` (same mode, new Play seed / same Daily seed). **Run start (`S0`):** pick seed by mode (`DBT-33`, `LED-7`), generate the 30-draw stream (`DBT-32`, Pattern card), set `pattern_index = 0`, `score = 0`, `streak = 0`, `longest_streak = 0`, `results[0..9] = UNPLAYED`. Enter `LeadIn`. BGM ducks −8 dB while paused.",
      "evidence": "Seed/state reset and session-start events are produced.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 324,
        "line_end": 324,
        "quote": "| PA3 | Restart Run chosen | discard current run; new `S0` (same mode, new Play seed / same Daily seed) |"
      }
    }
  },
  {
    "id": "PA4",
    "label": "Quit run to title",
    "preconditions": [],
    "trigger": {
      "type": "Event",
      "name": "QuitToTitleChosen"
    },
    "effects": [
      {
        "type": "StateUpdate",
        "entity": "Paused",
        "attribute": "paused",
        "operator": "SET",
        "value": false
      },
      {
        "type": "StateUpdate",
        "entity": "Phase",
        "attribute": "phase",
        "operator": "SET",
        "value": "Title"
      },
      {
        "type": "EventEmission",
        "name": "MenuStandbySoundPlayed"
      }
    ],
    "provenance": {
      "mechanic": "PA4",
      "gdd_quote": "| PA4 | Quit to Title chosen | discard run (no best save); → Title |",
      "precondition": "Quit to Title chosen",
      "action": "Apply PA4 under the stated condition and trigger.",
      "expected": "discard run (no best save); → Title",
      "evidence": "State becomes Title and menu cue fires.",
      "source": {
        "file": "gdds/small/echo_three.md",
        "line_start": 325,
        "line_end": 325,
        "quote": "| PA4 | Quit to Title chosen | discard run (no best save); → Title |"
      }
    }
  }
]