diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fd4f2b0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+node_modules
+.DS_Store
diff --git a/README.md b/README.md
index ce91eb8..d691f4c 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ The first pass includes:
 - idle, wander, sleep, cursor-chase, and toy-chase behavior
 - bounded toy spawning with cooldowns
 - lightweight per-pane overlay rendering
-- external cat sprite frames with state transitions between major behaviors
+- external cat sprite assets with state transitions between major behaviors
 
 ## Install locally during development
 
@@ -24,7 +24,11 @@ module.exports = {
       maxToys: 1,
       toyCooldownMs: 20000,
       successToyChance: 0.35,
-      walkSpeed: 0.65
+      walkSpeed: 0.45,
+      animationSpeed: 0.5,
+      sleepMinDurationMs: 30000,
+      sleepMaxDurationMs: 180000,
+      debugFrames: false
     }
   },
   localPlugins: [
@@ -50,7 +54,11 @@ hyperPets: {
   toyCooldownMs: 20000,
   successToyChance: 0.35,
   chaseCursorChance: 0.04,
-  walkSpeed: 0.65,
+  walkSpeed: 0.45,
+  animationSpeed: 0.5,
+  sleepMinDurationMs: 30000,
+  sleepMaxDurationMs: 180000,
+  debugFrames: false,
   reducedMotion: false,
   onlyActivePane: true
 }
@@ -60,11 +68,30 @@ hyperPets: {
 
 - Command-success toy spawning currently uses a prompt-return heuristic from terminal output, not shell integration.
 - The plugin is intentionally conservative so it does not flood panes with toys or constant motion.
-- The current animation system uses asset manifests under `assets/pets/`, with only `cat` shipped right now. The loader is generic so additional pet types can be added later without changing behavior logic.
+- The current animation system uses asset manifests under `assets/pets/`. `cat` is currently aliased to the Maple sprite sheet so existing configs keep working.
 
 ## Asset Pipeline
 
 - Cat frames live in `assets/pets/cat/frames/*.svg`.
 - The cat manifest in `assets/pets/cat.js` maps clips and transitions to those frame files.
-- The renderer reads the SVG files once at startup and swaps them by animation clip at runtime.
+- Maple lives in `assets/pets/maple/` and is wired as a sprite-sheet asset through `assets/pets/maple.js`.
+- The renderer supports both individual SVG frames and sprite-sheet cells behind the same clip API.
 - To add a new pet type later, create another manifest under `assets/pets/` plus a matching frame directory, then register it in `assets/pets/index.js`.
+
+## Sheet Tools
+
+- Split a uniform sheet into per-frame PNGs:
+
+```bash
+bash scripts/split_sprite_sheet.sh assets/pets/maple/spritesheet.webp 192 208 assets/pets/maple/frames maple
+```
+
+- Stitch a frame directory back into a sheet:
+
+```bash
+bash scripts/stitch_sprite_sheet.sh assets/pets/maple/frames 8 9 /tmp/maple-sheet.png maple
+```
+
+## Debugging
+
+- Set `hyperPets.debugFrames` to `true` to show the active clip, frame number, facing direction, sprite-sheet row/column, and a rolling history of the last 5 displayed frames beside each pet.
diff --git a/assets/pets/index.js b/assets/pets/index.js
index 411913a..daa5204 100644
--- a/assets/pets/index.js
+++ b/assets/pets/index.js
@@ -1,9 +1,12 @@
 'use strict';
 
 const cat = require('./cat');
+const maple = require('./maple');
 
 const PET_ASSETS = {
-  cat
+  cat: maple,
+  maple,
+  legacyCat: cat
 };
 
 function getPetAsset(type) {
diff --git a/assets/pets/maple.js b/assets/pets/maple.js
new file mode 100644
index 0000000..2cd950e
--- /dev/null
+++ b/assets/pets/maple.js
@@ -0,0 +1,135 @@
+'use strict';
+
+const path = require('path');
+const { pathToFileURL } = require('url');
+
+const SHEET_WIDTH = 1536;
+const SHEET_HEIGHT = 1872;
+const CELL_WIDTH = 192;
+const CELL_HEIGHT = 208;
+const SHEET_URL = pathToFileURL(path.join(__dirname, 'maple', 'spritesheet.webp')).href;
+
+function cell(row, col, facingBasis) {
+  return {
+    sheetUrl: SHEET_URL,
+    sheetWidth: SHEET_WIDTH,
+    sheetHeight: SHEET_HEIGHT,
+    frameX: col * CELL_WIDTH,
+    frameY: row * CELL_HEIGHT,
+    frameWidth: CELL_WIDTH,
+    frameHeight: CELL_HEIGHT,
+    facingBasis: facingBasis || 'left'
+  };
+}
+
+function rowFrames(row, startCol, count, facingBasis) {
+  const frames = [];
+  for (let index = 0; index < count; index += 1) {
+    frames.push(cell(row, startCol + index, facingBasis));
+  }
+  return frames;
+}
+
+module.exports = {
+  width: 48,
+  height: 52,
+  clips: {
+    idle0: {
+      fps: 1.4,
+      frames: rowFrames(0, 0, 6, 'left')
+    },
+    idle1: {
+      fps: 1.4,
+      frames: rowFrames(6, 0, 6, 'left')
+    },
+    idle2: {
+      fps: 1.4,
+      frames: rowFrames(7, 0, 6, 'left')
+    },
+    idle3: {
+      fps: 1.4,
+      frames: rowFrames(8, 0, 6, 'left')
+    },
+    walkRight: {
+      fps: 4.4,
+      frames: rowFrames(1, 0, 8, 'right')
+    },
+    walkLeft: {
+      fps: 4.4,
+      frames: rowFrames(2, 0, 8, 'left')
+    },
+    inspectLeft: {
+      fps: 2.2,
+      frames: rowFrames(3, 0, 4, 'left')
+    },
+    inspectRight: {
+      fps: 2.2,
+      frames: rowFrames(3, 0, 4, 'left')
+    },
+    pounceLeft: {
+      fps: 4,
+      frames: rowFrames(4, 0, 5, 'left')
+    },
+    pounceRight: {
+      fps: 4,
+      frames: rowFrames(4, 0, 5, 'left')
+    },
+    sleep: {
+      fps: 1,
+      frames: [
+        cell(5, 3, 'left')
+      ]
+    },
+    sleepWakeLeft: {
+      fps: 2.6,
+      frames: rowFrames(5, 4, 3, 'left'),
+      nextClip: 'idle0'
+    },
+    sleepWakeRight: {
+      fps: 2.6,
+      frames: rowFrames(5, 4, 3, 'left'),
+      nextClip: 'idle0'
+    },
+    transitionIdleWalkLeft: {
+      fps: 3,
+      frames: rowFrames(2, 0, 3, 'left'),
+      nextClip: 'walkLeft'
+    },
+    transitionIdleWalkRight: {
+      fps: 3,
+      frames: rowFrames(1, 0, 3, 'right'),
+      nextClip: 'walkRight'
+    },
+    transitionIdleSleep: {
+      fps: 2.8,
+      frames: rowFrames(5, 0, 4, 'left'),
+      nextClip: 'sleep'
+    }
+  },
+  transitions: {
+    'idle0->walkLeft': 'transitionIdleWalkLeft',
+    'idle1->walkLeft': 'transitionIdleWalkLeft',
+    'idle2->walkLeft': 'transitionIdleWalkLeft',
+    'idle3->walkLeft': 'transitionIdleWalkLeft',
+    'idle0->walkRight': 'transitionIdleWalkRight',
+    'idle1->walkRight': 'transitionIdleWalkRight',
+    'idle2->walkRight': 'transitionIdleWalkRight',
+    'idle3->walkRight': 'transitionIdleWalkRight',
+    'idle0->sleep': 'transitionIdleSleep',
+    'idle1->sleep': 'transitionIdleSleep',
+    'idle2->sleep': 'transitionIdleSleep',
+    'idle3->sleep': 'transitionIdleSleep',
+    'inspectLeft->walkLeft': 'transitionIdleWalkLeft',
+    'inspectRight->walkRight': 'transitionIdleWalkRight',
+    'sleep->idle0': 'sleepWakeLeft',
+    'sleep->idle1': 'sleepWakeLeft',
+    'sleep->idle2': 'sleepWakeLeft',
+    'sleep->idle3': 'sleepWakeLeft',
+    'sleep->walkLeft': 'sleepWakeLeft',
+    'sleep->walkRight': 'sleepWakeRight',
+    'sleep->inspectLeft': 'sleepWakeLeft',
+    'sleep->inspectRight': 'sleepWakeRight',
+    'sleep->pounceLeft': 'sleepWakeLeft',
+    'sleep->pounceRight': 'sleepWakeRight'
+  }
+};
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diff --git a/assets/pets/maple/frames/maple-r09-c08.png b/assets/pets/maple/frames/maple-r09-c08.png
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diff --git a/assets/pets/maple/pet.json b/assets/pets/maple/pet.json
new file mode 100644
index 0000000..cda54db
--- /dev/null
+++ b/assets/pets/maple/pet.json
@@ -0,0 +1,6 @@
+{
+  "id": "maple",
+  "displayName": "Maple",
+  "description": "A tiny brownish-gray cat, fiercely protective and playful.",
+  "spritesheetPath": "spritesheet.webp"
+}
diff --git a/assets/pets/maple/spritesheet.webp b/assets/pets/maple/spritesheet.webp
new file mode 100644
index 0000000..01979f5
Binary files /dev/null and b/assets/pets/maple/spritesheet.webp differ
diff --git a/index.js b/index.js
index 6a56d08..62050be 100644
--- a/index.js
+++ b/index.js
@@ -10,7 +10,11 @@ const DEFAULT_CONFIG = {
   toyCooldownMs: 20000,
   successToyChance: 0.35,
   chaseCursorChance: 0.04,
-  walkSpeed: 0.65,
+  walkSpeed: 0.45,
+  animationSpeed: 0.5,
+  sleepMinDurationMs: 30000,
+  sleepMaxDurationMs: 180000,
+  debugFrames: false,
   reducedMotion: false,
   onlyActivePane: true
 };
@@ -36,6 +40,10 @@ function normalizeConfig(input) {
   next.successToyChance = clamp(Number(next.successToyChance), 0, 1);
   next.chaseCursorChance = clamp(Number(next.chaseCursorChance), 0, 1);
   next.walkSpeed = Math.max(Number(next.walkSpeed) || DEFAULT_CONFIG.walkSpeed, 0.2);
+  next.animationSpeed = Math.max(Number(next.animationSpeed) || DEFAULT_CONFIG.animationSpeed, 0.15);
+  next.sleepMinDurationMs = Math.max(Number(next.sleepMinDurationMs) || DEFAULT_CONFIG.sleepMinDurationMs, 1000);
+  next.sleepMaxDurationMs = Math.max(Number(next.sleepMaxDurationMs) || DEFAULT_CONFIG.sleepMaxDurationMs, next.sleepMinDurationMs);
+  next.debugFrames = Boolean(next.debugFrames);
   next.petTypes = Array.isArray(next.petTypes) && next.petTypes.length ? next.petTypes : DEFAULT_CONFIG.petTypes;
   next.petTypes = next.petTypes.filter((type) => availablePetTypes.includes(type));
   if (next.petTypes.length === 0) {
@@ -44,20 +52,114 @@ function normalizeConfig(input) {
   return next;
 }
 
-function modeToClip(mode) {
+function findHyperPetsConfig(value, depth) {
+  if (!value || typeof value !== 'object' || depth > 4) {
+    return null;
+  }
+
+  if (value.hyperPets && typeof value.hyperPets === 'object') {
+    return value.hyperPets;
+  }
+
+  const keys = Object.keys(value);
+  for (let index = 0; index < keys.length; index += 1) {
+    const nested = value[keys[index]];
+    if (nested && typeof nested === 'object') {
+      const found = findHyperPetsConfig(nested, depth + 1);
+      if (found) {
+        return found;
+      }
+    }
+  }
+
+  return null;
+}
+
+function refreshRuntimeConfigFromRenderer() {
+  try {
+    if (typeof window === 'undefined') {
+      return runtimeConfig;
+    }
+
+    const candidates = [
+      window.__hyperpetsRuntimeConfig,
+      window.config,
+      window.config && window.config.getConfig ? window.config.getConfig() : null,
+      window.store && window.store.getState ? window.store.getState() : null
+    ];
+
+    for (let index = 0; index < candidates.length; index += 1) {
+      const found = findHyperPetsConfig(candidates[index], 0);
+      if (found) {
+        const normalized = normalizeConfig(found);
+        runtimeConfig = normalized;
+        window.__hyperpetsRuntimeConfig = normalized;
+        return normalized;
+      }
+    }
+  } catch (error) {
+    console.warn('[hyperpets] failed to refresh renderer config', error);
+  }
+
+  return runtimeConfig;
+}
+
+function randomIdleClip() {
+  const variants = ['idle0', 'idle1', 'idle2', 'idle3'];
+  return variants[Math.floor(Math.random() * variants.length)];
+}
+
+function randomSleepDuration() {
+  const min = runtimeConfig.sleepMinDurationMs;
+  const max = runtimeConfig.sleepMaxDurationMs;
+  if (max <= min) {
+    return min;
+  }
+  return min + Math.round(Math.random() * (max - min));
+}
+
+function isIdleClipName(clipName) {
+  return typeof clipName === 'string' && /^idle\d*$/.test(clipName);
+}
+
+function getDefaultClipName(petAsset) {
+  if (petAsset.clips.idle0) {
+    return 'idle0';
+  }
+  if (petAsset.clips.idle) {
+    return 'idle';
+  }
+  return Object.keys(petAsset.clips)[0];
+}
+
+function getEffectiveClipFps(clip, reducedMotion) {
+  const baseFps = clip.fps * runtimeConfig.animationSpeed;
+  return reducedMotion ? Math.max(baseFps * 0.6, 1) : Math.max(baseFps, 1);
+}
+
+function modeToClip(pet) {
+  const mode = pet.mode;
+  const facingRight = pet.facing >= 0;
+  const petAsset = getPetAsset(pet.type);
   if (mode === 'sleep') {
     return 'sleep';
   }
   if (mode === 'inspect') {
-    return 'inspect';
+    return facingRight ? 'inspectRight' : 'inspectLeft';
   }
   if (mode === 'chase-cursor' || mode === 'chase-toy') {
-    return 'chase';
+    return facingRight ? 'walkRight' : 'walkLeft';
   }
   if (mode === 'walk') {
-    return 'walk';
+    return facingRight ? 'walkRight' : 'walkLeft';
   }
-  return 'idle';
+  if (pet.idleClip && petAsset.clips[pet.idleClip]) {
+    return pet.idleClip;
+  }
+  if (isIdleClipName(pet.clip) && petAsset.clips[pet.clip]) {
+    return pet.clip;
+  }
+  return getDefaultClipName(petAsset);
 }
 
 function getClipDuration(petType, clipName, reducedMotion) {
@@ -67,7 +169,7 @@ function getClipDuration(petType, clipName, reducedMotion) {
     return 1000;
   }
 
-  const fps = reducedMotion ? Math.max(clip.fps * 0.6, 1) : clip.fps;
+  const fps = getEffectiveClipFps(clip, reducedMotion);
   return (clip.frames.length / fps) * 1000;
 }
 
@@ -114,14 +216,21 @@ function resolveAnimationState(pet, desiredClip, now, reducedMotion) {
 
 function getAnimatedFrame(pet, reducedMotion, now) {
   const petAsset = getPetAsset(pet.type);
-  const clipName = pet.clip || 'idle';
-  const clip = petAsset.clips[clipName] || petAsset.clips.idle;
-  const fps = reducedMotion ? Math.max(clip.fps * 0.6, 1) : clip.fps;
-  const duration = 1000 / fps;
-  const elapsed = now - (pet.clipStartedAt || now);
-  const rawIndex = clip.frames.length === 1 ? 0 : Math.floor(elapsed / duration);
-  const safeIndex = ((rawIndex % clip.frames.length) + clip.frames.length) % clip.frames.length;
-  return clip.frames[safeIndex] || petAsset.clips.idle.frames[0];
+  const defaultClipName = getDefaultClipName(petAsset);
+  const clipName = pet.clip || defaultClipName;
+  const clip = petAsset.clips[clipName] || petAsset.clips[defaultClipName];
+  const fps = getEffectiveClipFps(clip, reducedMotion);
+  const safeIndex = typeof pet.frameIndex === 'number' && clip.frames[pet.frameIndex]
+    ? pet.frameIndex
+    : 0;
+  const frame = clip.frames[safeIndex] || petAsset.clips[defaultClipName].frames[0];
+  return {
+    clipName,
+    fps,
+    frame,
+    frameIndex: safeIndex,
+    frameCount: clip.frames.length
+  };
 }
 
 function subscribe(uid, listener) {
@@ -201,6 +310,17 @@ function inspectSessionData(uid, data) {
 
 exports.decorateConfig = (config) => {
   runtimeConfig = normalizeConfig(config.hyperPets);
+  try {
+    if (typeof window !== 'undefined') {
+      window.__hyperpetsRuntimeConfig = runtimeConfig;
+    }
+  } catch (error) {
+    // Ignore window access errors during non-renderer evaluation.
+  }
+  console.log('[hyperpets] decorateConfig', {
+    input: config.hyperPets || null,
+    normalized: runtimeConfig
+  });
   return Object.assign({}, config, {
     css: `
       ${config.css || ''}
@@ -223,8 +343,6 @@ exports.decorateConfig = (config) => {
       .hyperpets-pet {
         position: absolute;
         bottom: 12px;
-        width: 48px;
-        height: 32px;
         transform-origin: center bottom;
         will-change: transform, left;
       }
@@ -254,13 +372,45 @@ exports.decorateConfig = (config) => {
         overflow: visible;
       }
       .hyperpets-frame {
-        width: 48px;
-        height: 32px;
+        position: relative;
+        overflow: hidden;
+        transform-origin: center bottom;
+      }
+      .hyperpets-frame-debug {
+        outline: 1px dashed rgba(80, 220, 255, 0.7);
+        background-color: rgba(80, 220, 255, 0.06);
       }
       .hyperpets-frame svg {
         display: block;
-        width: 48px;
-        height: 32px;
+        width: 100%;
+        height: 100%;
+      }
+      .hyperpets-debug-label {
+        position: absolute;
+        left: -12px;
+        bottom: 56px;
+        min-width: 150px;
+        padding: 4px 6px;
+        border-radius: 6px;
+        background: rgba(8, 12, 18, 0.86);
+        color: #9ee7ff;
+        font: 10px/1.35 Menlo, Monaco, monospace;
+        white-space: pre;
+        pointer-events: none;
+      }
+      .hyperpets-debug-hud {
+        position: absolute;
+        top: 8px;
+        left: 8px;
+        max-width: min(420px, calc(100% - 16px));
+        padding: 6px 8px;
+        border-radius: 8px;
+        background: rgba(8, 12, 18, 0.9);
+        color: #9ee7ff;
+        font: 11px/1.4 Menlo, Monaco, monospace;
+        white-space: pre-wrap;
+        pointer-events: none;
+        z-index: 20;
       }
       .hyperpets-z {
         position: absolute;
@@ -297,6 +447,8 @@ exports.decorateTerm = (Term, { React }) => {
       this._resizeHandler = this.handleResize.bind(this);
       this._mouseHandler = this.handleMouseMove.bind(this);
       this._tick = this.tick.bind(this);
+      this._debugFrameHistory = new Map();
+      this._debugLastLoggedToken = new Map();
     }
 
     buildInitialState() {
@@ -305,6 +457,8 @@ exports.decorateTerm = (Term, { React }) => {
       for (let index = 0; index < config.petCount; index += 1) {
         const now = Date.now();
         const type = config.petTypes[index % config.petTypes.length] || 'cat';
+        const petAsset = getPetAsset(type);
+        const idleClip = petAsset.clips.idle0 ? randomIdleClip() : getDefaultClipName(petAsset);
         pets.push({
           id: `pet-${index}`,
           type,
@@ -318,9 +472,15 @@ exports.decorateTerm = (Term, { React }) => {
           nextDecisionAt: now + 2200 + Math.random() * 1800,
           nextAttentionAt: now + 2500 + Math.random() * 2500,
           attentionUntil: 0,
+          pendingMode: null,
+          pendingModeAt: 0,
+          pendingFacing: 1,
+          idleClip,
           zOffset: Math.round(Math.random() * 6),
-          clip: 'idle',
+          clip: idleClip,
           clipStartedAt: now,
+          frameIndex: 0,
+          nextFrameAt: now + (1000 / getEffectiveClipFps(petAsset.clips[idleClip], runtimeConfig.reducedMotion)),
           transitionTo: null
         });
       }
@@ -337,6 +497,13 @@ exports.decorateTerm = (Term, { React }) => {
     componentDidMount() {
       this._mounted = true;
       this._container = this.props.termRef || null;
+      refreshRuntimeConfigFromRenderer();
+      if (runtimeConfig.debugFrames) {
+        console.log('[hyperpets] HyperPetsLayer mounted', {
+          uid: this.props.uid,
+          runtimeConfig
+        });
+      }
       this.measure();
       window.addEventListener('resize', this._resizeHandler);
       if (this._container) {
@@ -405,6 +572,8 @@ exports.decorateTerm = (Term, { React }) => {
             mode: pet.mode === 'sleep' ? 'idle' : pet.mode,
             sleepUntil: 0,
             attentionUntil: 0,
+            pendingMode: null,
+            pendingModeAt: 0,
             nextAttentionAt: Date.now() + 2200,
             nextDecisionAt: Date.now() + 1600
           }))
@@ -486,13 +655,29 @@ exports.decorateTerm = (Term, { React }) => {
           const speedScale = runtimeConfig.reducedMotion ? 0.45 : 1;
           const travel = next.vx * runtimeConfig.walkSpeed * dt * speedScale;
           const attentionActive = next.attentionUntil > now;
+          const isMovingMode = next.mode === 'walk' || next.mode === 'chase-toy' || next.mode === 'chase-cursor';
 
           if (!active) {
             next.mode = 'sleep';
-            next.sleepUntil = now + 5000;
+            next.sleepUntil = now + randomSleepDuration();
             next.mood = 'calm';
             next.targetX = null;
             next.attentionUntil = 0;
+            next.pendingMode = null;
+            next.pendingModeAt = 0;
+          } else if (next.pendingMode && next.mode === 'idle' && now >= next.pendingModeAt) {
+            next.mode = next.pendingMode;
+            next.pendingMode = null;
+            next.pendingModeAt = 0;
+            next.targetX = null;
+            next.facing = next.pendingFacing || next.facing;
+            if (next.mode === 'sleep') {
+              next.sleepUntil = now + randomSleepDuration();
+              next.attentionUntil = 0;
+            } else if (next.mode === 'inspect') {
+              next.attentionUntil = now + 1600 + Math.random() * 1400;
+              next.nextDecisionAt = now + 1800 + Math.random() * 1200;
+            }
           } else if (targetToy) {
             next.targetX = targetToy.x;
             next.mode = 'chase-toy';
@@ -509,30 +694,54 @@ exports.decorateTerm = (Term, { React }) => {
               next.nextAttentionAt = now + 5000 + Math.random() * 5000;
               next.nextDecisionAt = now + 1800 + Math.random() * 1200;
             } else if (shouldNoticeCursor) {
-              next.targetX = cursorTarget;
-              next.mode = 'inspect';
-              next.mood = 'curious';
-              next.attentionUntil = now + 900 + Math.random() * 900;
-              next.nextAttentionAt = now + 4200 + Math.random() * 4200;
-              next.nextDecisionAt = now + 1500 + Math.random() * 900;
+              next.pendingFacing = cursorTarget >= next.x ? 1 : -1;
+              if (isMovingMode) {
+                next.targetX = null;
+                next.mode = 'idle';
+                next.pendingMode = 'inspect';
+                next.pendingModeAt = now + 900;
+                next.attentionUntil = 0;
+                next.nextDecisionAt = now + 900;
+              } else {
+                next.targetX = null;
+                next.mode = 'inspect';
+                next.mood = 'curious';
+                next.facing = next.pendingFacing;
+                next.attentionUntil = now + 900 + Math.random() * 900;
+                next.nextAttentionAt = now + 4200 + Math.random() * 4200;
+                next.nextDecisionAt = now + 1500 + Math.random() * 900;
+              }
             } else {
               next.nextAttentionAt = now + 1800 + Math.random() * 2800;
             }
           } else if (now >= next.nextDecisionAt) {
             const roll = Math.random();
             if (roll < 0.2) {
-              next.mode = 'sleep';
-              next.sleepUntil = now + 3500 + Math.random() * 5000;
-              next.targetX = null;
-              next.attentionUntil = 0;
+              if (isMovingMode) {
+                next.mode = 'idle';
+                next.targetX = null;
+                next.attentionUntil = 0;
+                next.pendingMode = 'sleep';
+                next.pendingModeAt = now + 900;
+              } else {
+                next.mode = 'sleep';
+                next.sleepUntil = now + randomSleepDuration();
+                next.targetX = null;
+                next.attentionUntil = 0;
+              }
             } else if (roll < 0.78) {
               next.mode = 'walk';
               next.targetX = clamp(24 + Math.random() * (width - 48), 16, laneMax);
               next.attentionUntil = now + 1200 + Math.random() * 1600;
+              next.pendingMode = null;
+              next.pendingModeAt = 0;
             } else {
               next.mode = 'idle';
               next.targetX = null;
               next.attentionUntil = 0;
+              next.pendingMode = null;
+              next.pendingModeAt = 0;
+              next.idleClip = randomIdleClip();
             }
             next.mood = 'calm';
             next.nextDecisionAt = now + 3200 + Math.random() * 3400;
@@ -546,14 +755,20 @@ exports.decorateTerm = (Term, { React }) => {
             next.mode = 'idle';
             next.nextDecisionAt = now + 1600 + Math.random() * 1600;
             next.nextAttentionAt = now + 2000 + Math.random() * 2000;
+            next.pendingMode = null;
+            next.pendingModeAt = 0;
+            next.idleClip = randomIdleClip();
           }
 
-          if (typeof next.targetX === 'number') {
+          if (typeof next.targetX === 'number' && (next.mode === 'walk' || next.mode === 'chase-toy' || next.mode === 'chase-cursor')) {
             const dx = next.targetX - next.x;
             if (Math.abs(dx) < 4) {
               next.targetX = null;
               next.attentionUntil = 0;
               next.mode = 'idle';
+              next.pendingMode = null;
+              next.pendingModeAt = 0;
+              next.idleClip = randomIdleClip();
             } else {
               next.facing = dx >= 0 ? 1 : -1;
               next.x = clamp(next.x + Math.sign(dx) * travel, 12, laneMax);
@@ -561,6 +776,8 @@ exports.decorateTerm = (Term, { React }) => {
                 next.mode = 'walk';
               }
             }
+          } else if (typeof next.targetX === 'number') {
+            next.targetX = null;
           } else if (next.mode === 'walk') {
             next.mode = 'idle';
           }
@@ -569,12 +786,31 @@ exports.decorateTerm = (Term, { React }) => {
             next.facing *= -1;
           }
 
-          const desiredClip = modeToClip(next.mode);
+          const desiredClip = modeToClip(next);
           const animationState = resolveAnimationState(next, desiredClip, now, runtimeConfig.reducedMotion);
+          const previousClip = next.clip;
           next.clip = animationState.clip;
           next.clipStartedAt = animationState.clipStartedAt;
           next.transitionTo = animationState.transitionTo;
 
+          const petAsset = getPetAsset(next.type);
+          const defaultClipName = getDefaultClipName(petAsset);
+          const activeClip = petAsset.clips[next.clip] || petAsset.clips[defaultClipName];
+          const frameDuration = 1000 / getEffectiveClipFps(activeClip, runtimeConfig.reducedMotion);
+
+          if (previousClip !== next.clip) {
+            next.frameIndex = 0;
+            next.nextFrameAt = now + frameDuration;
+          } else if (now >= (next.nextFrameAt || 0)) {
+            const lastIndex = Math.max(activeClip.frames.length - 1, 0);
+            const currentIndex = typeof next.frameIndex === 'number' ? next.frameIndex : 0;
+            next.frameIndex = lastIndex === 0 ? 0 : currentIndex + 1;
+            if (next.frameIndex > lastIndex) {
+              next.frameIndex = activeClip.nextClip ? lastIndex : 0;
+            }
+            next.nextFrameAt = now + frameDuration;
+          }
+
           return next;
         });
 
@@ -598,11 +834,58 @@ exports.decorateTerm = (Term, { React }) => {
     }
 
     renderPet(pet) {
-      const frame = getAnimatedFrame(pet, runtimeConfig.reducedMotion, Date.now());
+      const petAsset = getPetAsset(pet.type);
+      const frameInfo = getAnimatedFrame(pet, runtimeConfig.reducedMotion, Date.now());
+      const frame = frameInfo.frame;
+      const desiredFacing = pet.facing >= 0 ? 'right' : 'left';
+      const basisFacing = frame.facingBasis || 'left';
+      const flipX = desiredFacing !== basisFacing;
+      const frameRow = frame.frameY != null ? Math.round(frame.frameY / frame.frameHeight) + 1 : null;
+      const frameCol = frame.frameX != null ? Math.round(frame.frameX / frame.frameWidth) + 1 : null;
+      const debugToken = frameRow != null && frameCol != null
+        ? `${frameInfo.clipName}:${frameInfo.frameIndex + 1}/${frameInfo.frameCount}@r${frameRow}c${frameCol}`
+        : `${frameInfo.clipName}:${frameInfo.frameIndex + 1}/${frameInfo.frameCount}@svg`;
+      const existingHistory = this._debugFrameHistory.get(pet.id) || [];
+      const nextHistory = existingHistory.length > 0 && existingHistory[existingHistory.length - 1] === debugToken
+        ? existingHistory
+        : existingHistory.concat(debugToken).slice(-5);
+      this._debugFrameHistory.set(pet.id, nextHistory);
+      if (runtimeConfig.debugFrames) {
+        const previousToken = this._debugLastLoggedToken.get(pet.id);
+        if (previousToken !== debugToken) {
+          this._debugLastLoggedToken.set(pet.id, debugToken);
+          console.log(
+            `[hyperpets] ${pet.id} mode=${pet.mode} facing=${desiredFacing} basis=${basisFacing} clip=${frameInfo.clipName} frame=${frameInfo.frameIndex + 1}/${frameInfo.frameCount}` +
+            (frameRow != null && frameCol != null ? ` cell=r${frameRow}c${frameCol}` : ' cell=svg')
+          );
+        }
+      }
       const className = [
         'hyperpets-pet',
         pet.mood === 'excited' ? 'excited' : ''
       ].filter(Boolean).join(' ');
+      const frameNode = frame.svg
+        ? React.createElement('div', {
+          className: 'hyperpets-frame',
+          style: {
+            width: `${petAsset.width}px`,
+            height: `${petAsset.height}px`,
+            transform: `scaleX(${flipX ? -1 : 1}) translateZ(0)`
+          },
+          dangerouslySetInnerHTML: { __html: frame.svg }
+        })
+        : React.createElement('div', {
+          className: `hyperpets-frame${runtimeConfig.debugFrames ? ' hyperpets-frame-debug' : ''}`,
+          style: {
+            width: `${petAsset.width}px`,
+            height: `${petAsset.height}px`,
+            transform: `scaleX(${flipX ? -1 : 1}) translateZ(0)`,
+            backgroundImage: `url("${frame.sheetUrl}")`,
+            backgroundRepeat: 'no-repeat',
+            backgroundSize: `${(frame.sheetWidth / frame.frameWidth) * petAsset.width}px ${(frame.sheetHeight / frame.frameHeight) * petAsset.height}px`,
+            backgroundPosition: `-${(frame.frameX / frame.frameWidth) * petAsset.width}px -${(frame.frameY / frame.frameHeight) * petAsset.height}px`
+          }
+        });
 
       return React.createElement(
         'div',
@@ -611,16 +894,25 @@ exports.decorateTerm = (Term, { React }) => {
           className,
           style: {
             left: `${pet.x}px`,
-            transform: `scaleX(${pet.facing}) translateZ(0)`
+            width: `${petAsset.width}px`,
+            height: `${petAsset.height}px`
           }
         },
-        React.createElement(
-          'div',
-          {
-            className: 'hyperpets-frame',
-            dangerouslySetInnerHTML: { __html: frame.svg }
-          }
-        ),
+        frameNode,
+        runtimeConfig.debugFrames
+          ? React.createElement(
+            'div',
+            { className: 'hyperpets-debug-label' },
+            [
+              `${frameInfo.clipName} ${frameInfo.frameIndex + 1}/${frameInfo.frameCount}`,
+              `face ${desiredFacing} basis ${basisFacing}`,
+              frameRow != null && frameCol != null
+                ? `cell r${frameRow} c${frameCol}`
+                : 'svg-frame',
+              `hist ${nextHistory.join(' | ')}`
+            ].join('\n')
+          )
+          : null,
         pet.mode === 'sleep'
           ? React.createElement('div', {
             className: 'hyperpets-z',
@@ -631,13 +923,29 @@ exports.decorateTerm = (Term, { React }) => {
     }
 
     render() {
+      refreshRuntimeConfigFromRenderer();
       if (!runtimeConfig.enabled) {
         return null;
       }
 
+      const debugHud = runtimeConfig.debugFrames
+        ? React.createElement(
+          'div',
+          { className: 'hyperpets-debug-hud' },
+          this.state.pets.map((pet) => {
+            const history = this._debugFrameHistory.get(pet.id) || [];
+            return [
+              `${pet.id} mode=${pet.mode} facing=${pet.facing >= 0 ? 'right' : 'left'}`,
+              history.length ? `hist ${history.join(' | ')}` : 'hist (waiting for frames)'
+            ].join('\n');
+          }).join('\n\n')
+        )
+        : null;
+
       return React.createElement(
         'div',
         { className: 'hyperpets-layer' },
+        debugHud,
         React.createElement('div', { className: 'hyperpets-floor' }),
         this.state.toys.map((toy) => this.renderToy(toy)),
         this.state.pets.map((pet) => this.renderPet(pet))
diff --git a/scripts/split_sprite_sheet.sh b/scripts/split_sprite_sheet.sh
new file mode 100755
index 0000000..0d39890
--- /dev/null
+++ b/scripts/split_sprite_sheet.sh
@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -lt 4 || $# -gt 5 ]]; then
+  cat <<'EOF'
+Usage:
+  bash scripts/split_sprite_sheet.sh <sheet> <cell_width> <cell_height> <output_dir> [prefix]
+
+Example:
+  bash scripts/split_sprite_sheet.sh assets/pets/maple/spritesheet.webp 192 208 assets/pets/maple/frames maple
+
+Outputs:
+  <output_dir>/<prefix>-r01-c01.png
+  <output_dir>/<prefix>-r01-c02.png
+  ...
+
+Requirements:
+  - ffmpeg
+  - ffprobe
+EOF
+  exit 1
+fi
+
+sheet=$1
+cell_width=$2
+cell_height=$3
+output_dir=$4
+prefix=${5:-frame}
+
+if [[ ! -f "$sheet" ]]; then
+  echo "error: sheet not found: $sheet" >&2
+  exit 1
+fi
+
+if ! command -v ffmpeg >/dev/null 2>&1 || ! command -v ffprobe >/dev/null 2>&1; then
+  echo "error: ffmpeg and ffprobe are required" >&2
+  exit 1
+fi
+
+sheet_width=$(ffprobe -v error -select_streams v:0 -show_entries stream=width -of csv=p=0 "$sheet")
+sheet_height=$(ffprobe -v error -select_streams v:0 -show_entries stream=height -of csv=p=0 "$sheet")
+
+if (( sheet_width % cell_width != 0 )); then
+  echo "error: sheet width $sheet_width is not divisible by cell width $cell_width" >&2
+  exit 1
+fi
+
+if (( sheet_height % cell_height != 0 )); then
+  echo "error: sheet height $sheet_height is not divisible by cell height $cell_height" >&2
+  exit 1
+fi
+
+cols=$(( sheet_width / cell_width ))
+rows=$(( sheet_height / cell_height ))
+
+mkdir -p "$output_dir"
+
+for ((row = 0; row < rows; row++)); do
+  for ((col = 0; col < cols; col++)); do
+    x=$(( col * cell_width ))
+    y=$(( row * cell_height ))
+    out="$output_dir/${prefix}-r$(printf '%02d' $((row + 1)))-c$(printf '%02d' $((col + 1))).png"
+    ffmpeg -loglevel error -y -i "$sheet" -frames:v 1 -vf "crop=${cell_width}:${cell_height}:${x}:${y}" "$out"
+  done
+done
+
+echo "split complete: ${rows} rows x ${cols} cols -> $output_dir"
diff --git a/scripts/stitch_sprite_sheet.sh b/scripts/stitch_sprite_sheet.sh
new file mode 100644
index 0000000..f7e8441
--- /dev/null
+++ b/scripts/stitch_sprite_sheet.sh
@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -lt 4 || $# -gt 5 ]]; then
+  cat <<'EOF'
+Usage:
+  bash scripts/stitch_sprite_sheet.sh <frames_dir> <cols> <rows> <output_sheet> [prefix]
+
+Example:
+  bash scripts/stitch_sprite_sheet.sh assets/pets/maple/frames 8 9 /tmp/maple-sheet.png maple
+
+Expected input names:
+  <frames_dir>/<prefix>-r01-c01.png
+  <frames_dir>/<prefix>-r01-c02.png
+  ...
+
+Requirements:
+  - ffmpeg
+EOF
+  exit 1
+fi
+
+frames_dir=$1
+cols=$2
+rows=$3
+output_sheet=$4
+prefix=${5:-frame}
+
+if [[ ! -d "$frames_dir" ]]; then
+  echo "error: frames directory not found: $frames_dir" >&2
+  exit 1
+fi
+
+if ! command -v ffmpeg >/dev/null 2>&1; then
+  echo "error: ffmpeg is required" >&2
+  exit 1
+fi
+
+tmp_dir=$(mktemp -d /tmp/hyperpets-stitch.XXXXXX)
+cleanup() {
+  rm -rf "$tmp_dir"
+}
+trap cleanup EXIT
+
+index=0
+for ((row = 1; row <= rows; row++)); do
+  for ((col = 1; col <= cols; col++)); do
+    src="$frames_dir/${prefix}-r$(printf '%02d' "$row")-c$(printf '%02d' "$col").png"
+    if [[ ! -f "$src" ]]; then
+      echo "error: missing frame: $src" >&2
+      exit 1
+    fi
+    cp "$src" "$tmp_dir/$(printf '%04d' "$index").png"
+    index=$(( index + 1 ))
+  done
+done
+
+ffmpeg -loglevel error -y -framerate 1 -i "$tmp_dir/%04d.png" -frames:v 1 -vf "tile=${cols}x${rows}" "$output_sheet"
+
+echo "sheet written: $output_sheet"