feat: crimson metronome lends ½ heart, repaid on a clean room clear

index.html

@@ -6,32 +6,32 @@
 <meta name="theme-color" content="#0a0305">
 <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 64 64%22><text y=%2252%22 x=%2250%22 text-anchor=%22middle%22 dominant-baseline=%22middle%22 font-size=%2252%22>🔪</text></svg>">
 <title>MEATSLICER</title>
-<link rel="stylesheet" href="css/style.css?v=52">
+<link rel="stylesheet" href="css/style.css?v=53">
 </head>
 <body>
 <div id="wrap">
   <canvas id="game" width="960" height="640"></canvas>
 </div>
-<script src="js/utils.js?v=52"></script>
-<script src="js/state.js?v=52"></script>
-<script src="js/input.js?v=52"></script>
-<script src="js/sfx.js?v=52"></script>
-<script src="js/sfxbank.js?v=52"></script>
-<script src="js/audio.js?v=52"></script>
-<script src="js/sprites.js?v=52"></script>
-<script src="js/particles.js?v=52"></script>
-<script src="js/weapons.js?v=52"></script>
-<script src="js/bullets.js?v=52"></script>
-<script src="js/pickups.js?v=52"></script>
-<script src="js/items.js?v=52"></script>
-<script src="js/perks.js?v=52"></script>
-<script src="js/enemies.js?v=52"></script>
-<script src="js/bosses.js?v=52"></script>
-<script src="js/rooms.js?v=52"></script>
-<script src="js/player.js?v=52"></script>
-<script src="js/hud.js?v=52"></script>
-<script src="js/help.js?v=52"></script>
-<script src="js/debug.js?v=52"></script>
-<script src="js/main.js?v=52"></script>
+<script src="js/utils.js?v=53"></script>
+<script src="js/state.js?v=53"></script>
+<script src="js/input.js?v=53"></script>
+<script src="js/sfx.js?v=53"></script>
+<script src="js/sfxbank.js?v=53"></script>
+<script src="js/audio.js?v=53"></script>
+<script src="js/sprites.js?v=53"></script>
+<script src="js/particles.js?v=53"></script>
+<script src="js/weapons.js?v=53"></script>
+<script src="js/bullets.js?v=53"></script>
+<script src="js/pickups.js?v=53"></script>
+<script src="js/items.js?v=53"></script>
+<script src="js/perks.js?v=53"></script>
+<script src="js/enemies.js?v=53"></script>
+<script src="js/bosses.js?v=53"></script>
+<script src="js/rooms.js?v=53"></script>
+<script src="js/player.js?v=53"></script>
+<script src="js/hud.js?v=53"></script>
+<script src="js/help.js?v=53"></script>
+<script src="js/debug.js?v=53"></script>
+<script src="js/main.js?v=53"></script>
 </body>
 </html>

js/items.js

@@ -94,7 +94,7 @@ const ITEMS = {
   butchersoath:  { name: "Butcher's Oath",   desc: '+80% damage, but max HP set to 2', rarity: 'legendary', cap: 1, apply: (s, p) => { s.dmgMul *= 1.8; s.maxHp = Math.min(s.maxHp, 2); p.hp = Math.min(p.hp, s.maxHp); } },
   secondskin:    { name: 'Second Skin',      desc: 'Revive once per floor at ½ heart', rarity: 'legendary', cap: 1, apply: s => { s.secondSkin += 1; } },
   twinsidearm:   { name: 'Twin Sidearm',     desc: 'Bone Popper double-taps; specials burn 2× ammo', rarity: 'legendary', cap: 1, apply: s => { s.twinSidearm += 1; } },
-  crimsonmetronome:{ name: 'Crimson Metronome', desc: '+60% fire rate; every 8th shot costs ½ heart', rarity: 'legendary', cap: 1, apply: s => { s.rateMul *= 1.6; s.crimsonMetronome += 1; } },
+  crimsonmetronome:{ name: 'Crimson Metronome', desc: '+60% fire rate; every 8th shot lends ½ heart, repaid if you clear the room clean', rarity: 'legendary', cap: 1, apply: s => { s.rateMul *= 1.6; s.crimsonMetronome += 1; } },
   abattoirengine:{ name: 'Abattoir Engine',  desc: 'Pressure rises 2× faster; score and luck ×1.5', rarity: 'legendary', cap: 1, apply: s => { s.abattoirEngine += 1; s.luck += 0.5; } },
   gorecrown:     { name: 'Gore Crown',       desc: 'Free nova on every kill, −25% damage', rarity: 'legendary', cap: 1, apply: s => { s.goreCrown += 1; s.dmgMul *= 0.75; } },
   thousandteeth: { name: 'Thousand Teeth',   desc: '+6 shards that can crit, −40% base bullet damage', rarity: 'legendary', cap: 1, apply: s => { s.thousandTeeth += 1; s.dmgMul *= 0.6; } },

js/player.js

@@ -31,6 +31,7 @@ function initPlayer() {
     animT: 0, attackT: 0, actionT: 0, hitT: 0, deathT: 0,
     weapon: { id: 'bonepopper', ammo: Infinity },
     holstered: null,   // a special weapon set aside while the pistol is out
+    metronomeTmp: 0,   // ½-hearts lent by Crimson Metronome, repaid on a clean clear
     level: 1, xp: 0,
     items: {},         // iid -> quality tier (1..3)
     perks: [],         // perk ids drafted this run, in grant order
@@ -155,10 +156,16 @@ function updatePlayer(dt) {
         p.choirCount = (p.choirCount || 0) + 1;
         if (p.choirCount >= 4) { p.choirCount = 0; fireWeapon(p, w); }
       }
-      // Crimson Metronome: every 8th shot costs ½ heart
+      // Crimson Metronome: every 8th shot lends ½ heart, repaid when the room clears clean
       if (st.crimsonMetronome > 0) {
         p.metronomeCount = (p.metronomeCount || 0) + 1;
-        if (p.metronomeCount >= 8) { p.metronomeCount = 0; p.hp = Math.max(0.5, p.hp - 1); spawnText(p.x, p.y - 14, '-½', '#e2472f'); }
+        if (p.metronomeCount >= 8) {
+          p.metronomeCount = 0;
+          const loss = Math.min(1, Math.max(0, p.hp - 0.5));
+          p.hp = Math.max(0.5, p.hp - 1);
+          p.metronomeTmp += loss; // on loan: restored by a clean room clear
+          spawnText(p.x, p.y - 14, '-½', '#e2472f');
+        }
       }
       p.recoil = Math.min(1, p.recoil + (w.behavior === 'slam' ? 1 : 0.45));
       p.muzzleT = 0.07;

js/rooms.js

@@ -88,6 +88,7 @@ function enterRoom(gx, gy) {
   G.roomLayerKey = '';
   G.roomDamaged = false;
   G.roomEnterT = G.time;
+  if (G.player) G.player.metronomeTmp = 0; // fresh per-room Crimson-Metronome loan ledger
 
   const room = G.rooms[roomKey(gx, gy)];
   G.cur = room;
@@ -221,6 +222,13 @@ function recordRoomClear(room) {
   }
   // active items charge on room clears: +1 per combat room, +2 per boss
   const p = G.player;
+  // Crimson Metronome: a ½-heart loan is repaid when the room clears clean
+  if (!G.roomDamaged && p.metronomeTmp > 0) {
+    const back = Math.min(p.metronomeTmp, p.stats.maxHp - p.hp);
+    p.hp += back;
+    p.metronomeTmp = 0;
+    if (back > 0) spawnText(p.x, p.y - 26, 'LOAN REPAID +' + back, '#d98991');
+  }
   if (p && p.active) {
     const a = ACTIVES[p.active.iid];
     if (a) {

test/smoke.js

@@ -1810,5 +1810,33 @@ check('debug console closes back to play', ctx.G.mode === 'play');
   ctx.G.mode = 'play';
 })();
 
+console.log('== crimson metronome heart loan ==');
+{
+  ctx.startRun(); step(3, 16); // self-contained: fresh player, empty arena
+  ctx.G.enemies.length = 0;
+  const p = ctx.G.player;
+  ctx.giveItem('crimsonmetronome');
+  check('metronome grants the loan flag', p.stats.crimsonMetronome === 1);
+  p.weapon = { id: 'repeater', ammo: 500 }; p.holstered = null; // per-shot trigger
+  p.hp = 6; p.metronomeCount = 0; p.metronomeTmp = 0;
+  const hpBefore = p.hp;
+  ctx.Input.mdown = true;
+  let guard = 0;
+  while (p.metronomeTmp === 0 && guard++ < 4000) step(1, 16);
+  ctx.Input.mdown = false;
+  check('8th shot lends ½ heart (not lost)', p.hp === hpBefore - 1 && p.metronomeTmp === 1);
+  ctx.G.roomDamaged = false;
+  ctx.recordRoomClear({ type: 'combat' });
+  check('clean room clear repays the loan', p.hp === hpBefore && p.metronomeTmp === 0);
+  ctx.Input.mdown = true;
+  guard = 0;
+  while (p.metronomeTmp === 0 && guard++ < 4000) step(1, 16);
+  ctx.Input.mdown = false;
+  check('loan accrues again', p.hp === hpBefore - 1 && p.metronomeTmp === 1);
+  ctx.G.roomDamaged = true;
+  ctx.recordRoomClear({ type: 'combat' });
+  check('hit room forfeits the loan', p.hp === hpBefore - 1 && p.metronomeTmp === 1);
+}
+
 console.log(failures === 0 ? '\nALL CHECKS PASSED' : '\n' + failures + ' CHECKS FAILED');
 process.exit(failures === 0 ? 0 : 1);