Shared memory and context tools for agentic work.
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/**
* ActivationReplay.tsx — Frame-by-frame activation animation panel.
*
* Features:
* - Play / Pause / Speed controls (0.25x, 0.5x, 1x, 2x, 4x)
* - Frame scrubber (range slider)
* - Frame-by-frame stepping (← → arrow buttons)
* - Jump to peak frame button
* - Node color updates driven by requestAnimationFrame
* - 5 animation phases: inactive → firing → propagating → settled → decaying
*/
import React, { useEffect, useRef, useCallback } from 'react';
import { useReplayStore } from '../stores/replayStore';
import { useGraphStore } from '../stores/graphStore';
import type { NodeAnimationState } from '../types';
import { lerpColor } from '../lib/colors';
// ---- Phase color mapping -----------------------------------------------
const PHASE_COLORS = {
inactive: '#1a1a2e',
firing: '#ff6b35',
propagating: '#f59e0b',
settled: '#a78bfa',
decaying: '#2a2a3a',
};
function phaseColor(state: NodeAnimationState): string {
switch (state.phase) {
case 'inactive': return PHASE_COLORS.inactive;
case 'firing': return lerpColor(PHASE_COLORS.inactive, PHASE_COLORS.firing, state.intensity);
case 'propagating': return lerpColor(PHASE_COLORS.firing, PHASE_COLORS.propagating, state.intensity);
case 'settled': return lerpColor(PHASE_COLORS.propagating, PHASE_COLORS.settled, state.score);
case 'decaying': return lerpColor(PHASE_COLORS.settled, PHASE_COLORS.inactive, 0.5);
}
// ---- Derive animation state from score at frame ------------------------
function scoreToAnimState(score: number, isSeed: boolean, prevScore: number): NodeAnimationState {
if (score <= 0.02) {
return prevScore > 0.02
? { phase: 'decaying' }
: { phase: 'inactive' };
if (score > prevScore + 0.05) {
// Rising — firing or propagating based on whether it's a seed
return isSeed
? { phase: 'firing', intensity: Math.min(1, score) }
: { phase: 'propagating', intensity: Math.min(1, score) };
// Stable
return { phase: 'settled', score: Math.min(1, score) };
// ---- Speed options -----------------------------------------------------
const SPEED_OPTIONS = [0.25, 0.5, 1, 2, 4] as const;
const BASE_FRAME_MS = 50; // ms per frame at 1x speed
// ---- Component ---------------------------------------------------------
interface ActivationReplayProps {
onBack?: () => void;
const ActivationReplay = React.memo(function ActivationReplay({ onBack }: ActivationReplayProps) {
const {
isReplaying,
query,
frames,
currentFrame,
isPlaying,
speed,
totalDurationMs,
setFrame,
play,
pause,
stopReplay,
setSpeed,
nextFrame,
prevFrame,
jumpToPeak,
} = useReplayStore();
const { nodes, setNodes } = useGraphStore();
// rAF loop state
const rafRef = useRef<number | null>(null);
const lastTickRef = useRef<number>(0);
const prevScoresRef = useRef<Map<string, number>>(new Map());
// Apply frame to graph store nodes
const applyFrame = useCallback((frameIdx: number) => {
const frame = frames[frameIdx];
if (!frame) return;
const scoreMap = new Map(frame.node_activations.map((na) => [na.nodeId, na]));
const updatedNodes = nodes.map((node) => {
const na = scoreMap.get(node.id);
if (!na) return node;
const prevScore = prevScoresRef.current.get(node.id) ?? 0;
const animState = scoreToAnimState(na.score, na.isSeed, prevScore);
const color = phaseColor(animState);
return {
...node,
style: {
...node.style,
'--node-color': color,
'--node-glow': na.score > 0.5 ? `0 0 8px ${color}88` : 'none',
} as React.CSSProperties,
data: {
...node.data,
activation: na.score,
animationState: animState,
},
});
// Update previous scores
frame.node_activations.forEach((na) => {
prevScoresRef.current.set(na.nodeId, na.score);
setNodes(updatedNodes);
}, [frames, nodes, setNodes]);
// rAF playback loop
useEffect(() => {
if (!isPlaying || frames.length === 0) {
if (rafRef.current !== null) {
cancelAnimationFrame(rafRef.current);
rafRef.current = null;
return;
const frameDurationMs = BASE_FRAME_MS / speed;
const tick = (timestamp: number) => {
if (lastTickRef.current === 0) lastTickRef.current = timestamp;
const elapsed = timestamp - lastTickRef.current;
if (elapsed >= frameDurationMs) {
lastTickRef.current = timestamp;
const nextFrameIdx = useReplayStore.getState().currentFrame + 1;
if (nextFrameIdx >= frames.length) {
// End of replay — pause at last frame
useReplayStore.getState().pause();
useReplayStore.getState().setFrame(nextFrameIdx);
applyFrame(nextFrameIdx);
rafRef.current = requestAnimationFrame(tick);
lastTickRef.current = 0;
return () => {
}, [isPlaying, speed, frames.length, applyFrame]);
// Apply current frame when user scrubs manually
if (!isPlaying) {
applyFrame(currentFrame);
}, [currentFrame, isPlaying, applyFrame]);
// Keyboard: space = play/pause, ← → = frame step
const handleKey = (e: KeyboardEvent) => {
if (!isReplaying) return;
if (e.code === 'Space') {
e.preventDefault();
if (isPlaying) pause(); else play();
if (e.code === 'ArrowRight') { e.preventDefault(); nextFrame(); }
if (e.code === 'ArrowLeft') { e.preventDefault(); prevFrame(); }
window.addEventListener('keydown', handleKey);
return () => window.removeEventListener('keydown', handleKey);
}, [isReplaying, isPlaying, play, pause, nextFrame, prevFrame]);
if (!isReplaying) return null;
const frameCount = frames.length;
const progressPct = frameCount > 1 ? (currentFrame / (frameCount - 1)) * 100 : 0;
const currentTimeMs = frames[currentFrame]?.timestamp_ms ?? 0;
// Current frame stats
const currentFrameData = frames[currentFrame];
const activeNodeCount = currentFrameData
? currentFrameData.node_activations.filter((na) => na.score > 0.05).length
: 0;
const peakScore = currentFrameData
? Math.max(0, ...currentFrameData.node_activations.map((na) => na.score))
return (
<div className="fixed inset-x-0 bottom-0 z-40 bg-m1nd-surface border-t border-m1nd-border-medium shadow-2xl">
{/* Header */}
<div className="flex items-center justify-between px-4 py-2 border-b border-m1nd-border-subtle">
<div className="flex items-center gap-3">
<span className="text-xs font-mono text-m1nd-accent font-semibold uppercase tracking-wider">
Replay
</span>
<span className="text-xs text-zinc-400 font-mono truncate max-w-[200px]" title={query}>
activate("{query}")
</div>
<div className="flex items-center gap-3 text-xs text-zinc-500 font-mono">
<span>
{activeNodeCount} active
peak {(peakScore * 100).toFixed(0)}%
<button
onClick={() => { stopReplay(); onBack?.(); }}
className="ml-2 text-zinc-500 hover:text-zinc-200 transition-colors"
title="Close replay"
aria-label="Close replay"
>
✕
</button>
{/* Progress bar + scrubber */}
<div className="px-4 py-2">
<div className="relative">
{/* Background track */}
<div className="h-1 bg-m1nd-border-medium rounded-full mb-1" />
{/* Filled progress */}
<div
className="absolute top-0 left-0 h-1 bg-m1nd-accent rounded-full transition-none"
style={{ width: `${progressPct}%` }}
/>
{/* Scrubber input */}
<input
type="range"
min={0}
max={Math.max(0, frameCount - 1)}
value={currentFrame}
onChange={(e) => {
const f = parseInt(e.target.value, 10);
setFrame(f);
}}
className="absolute inset-0 w-full h-1 opacity-0 cursor-pointer"
aria-label="Frame position"
{/* Time display */}
<div className="flex justify-between text-[10px] text-zinc-600 font-mono mt-0.5">
<span>{currentTimeMs.toFixed(0)}ms</span>
frame {currentFrame + 1}/{frameCount}
<span>{totalDurationMs.toFixed(0)}ms</span>
{/* Controls */}
<div className="flex items-center justify-center gap-3 px-4 pb-3">
{/* Prev frame */}
onClick={prevFrame}
disabled={currentFrame === 0}
className="w-7 h-7 flex items-center justify-center rounded text-zinc-400 hover:text-zinc-200 hover:bg-m1nd-elevated disabled:opacity-30 disabled:cursor-not-allowed transition-colors"
title="Previous frame (←)"
aria-label="Previous frame"
◀
{/* Play / Pause */}
onClick={isPlaying ? pause : play}
className="w-9 h-9 flex items-center justify-center rounded-full bg-m1nd-accent text-white hover:bg-violet-400 transition-colors shadow-lg"
title={isPlaying ? 'Pause (Space)' : 'Play (Space)'}
aria-label={isPlaying ? 'Pause' : 'Play'}
{isPlaying ? '⏸' : '▶'}
{/* Next frame */}
onClick={nextFrame}
disabled={currentFrame >= frameCount - 1}
title="Next frame (→)"
aria-label="Next frame"
▶
{/* Separator */}
<div className="w-px h-5 bg-m1nd-border-medium mx-1" />
{/* Jump to peak */}
onClick={jumpToPeak}
className="px-2 py-1 text-[10px] font-mono rounded text-zinc-400 hover:text-m1nd-accent hover:bg-m1nd-elevated transition-colors"
title="Jump to peak activation frame"
aria-label="Jump to peak"
PEAK
{/* Speed controls */}
<div className="flex items-center gap-1">
{SPEED_OPTIONS.map((s) => (
key={s}
onClick={() => setSpeed(s)}
className={`px-1.5 py-0.5 text-[10px] font-mono rounded transition-colors ${
speed === s
? 'bg-m1nd-accent text-white'
: 'text-zinc-500 hover:text-zinc-200 hover:bg-m1nd-elevated'
}`}
title={`${s}x speed`}
aria-label={`${s}x speed`}
aria-pressed={speed === s}
{s}×
))}
);
export default ActivationReplay;
