Geist Learning Lab

Build interactive learning experiences that teach by making the learner do something, get feedback, and iterate — using Geist's dark-first, minimal, precise UI language.

Design Philosophy

• Learning loops, not pages — Every screen completes: prompt → attempt → feedback → refinement → checkpoint
• Cognitive load management — Progressive disclosure, chunking, one concept + one action at a time
• Error-friendly design — Mistakes are expected; the UI normalizes them and turns them into learning moments
• Interactive representations — Sliders, toggles, diagrams, live code — not just text
• Geist precision — Dark backgrounds, tight tracking, semantic color, 4px grid, Swiss typography

Critical Rules

1. Every lesson must include at least one attempt+feedback loop — No passive-only pages
2. Every interactive control must have a visible effect — Within ~100ms or show loading state
3. Progress/review must exist even in a prototype — Track steps completed, checkpoints passed
4. Active attempt before explanation — Ask a question or show a task, then explain
5. Immediate, specific feedback — "Correct" isn't enough; explain why
6. Multiple representations — Always at least 2 of: text, code, visual, interactive, real data
7. Color is learning signal — Green=correct, Red=incorrect, Amber=hint/warning, Blue=info/definition
8. Progressive disclosure by default — Depth behind "Why?", "Edge Cases", "Formal Definition"
9. URL state for exploration — Shareable slider/toggle configurations via search params
10. Misconception-first design — Bake in common traps: "Most people get this wrong because..."

The Learning Loop (Central Doctrine)

Every lesson repeats this cycle:

Step	What Happens	Component
Orient	What you'll learn in 5-10 min	Heading + learning objective
Attempt	Learner predicts/answers/edits first	QuickCheck, CodePlayground, ParameterDock
Feedback	Immediate + specific response	Feedback surface (green/red panel)
Explain	Short explanation anchored to their attempt	Callout, WorkedExample
Extend	Variation, edge case, or transfer task	BeforeAfterSplit, ConceptExplorer
Checkpoint	Quick recall question	QuickCheck with ConfidenceRating
Reflect	"What changed in your understanding?"	Optional text input or self-rating

"Aha Moment" Design Patterns

Pattern	How It Works	When to Use
Prediction Gap	"What do you think happens if...?" then reveal	Before introducing a concept
Contrast Pair	Two near-identical cases with different outcomes	Clarifying subtle distinctions
Slider to Failure	Let learner push a parameter until it breaks	Understanding boundaries/limits
Time Travel	Scrub algorithm step-by-step, watch invariants	Algorithms, state machines
Misconception Trap	Tempting wrong option, then explain why wrong	Common errors in a domain

Quick Color Reference (Learning Semantics)

Signal	Color Token	Hex	Usage
Correct	green-700	#46A758	Success feedback, completed steps
Incorrect	red-700	#E5484D	Error feedback, failed checks
Hint/Caution	amber-700	#FFB224	Hints, warnings, "watch out"
Info/Definition	blue-700	#0070F3	Definitions, current step, links
Default	gray-400	#737373	Everything else: borders, muted text
Progress done	green-700 dot	#46A758	Completed step indicator
Progress current	blue-700 ring	#0070F3	Current step focus state
Progress pending	gray-400 dot	#737373	Upcoming steps

Component Library (23 Patterns)

Lesson Flow & Progress

<LessonShell /> <ProgressRail /> <StepFlow /> <CheckpointCard /> <ResumeBanner />

Explorable Explanations

<ParameterDock /> <LiveOutputPanel /> <ConceptExplorer /> <InteractiveDiagram /> <BeforeAfterSplit /> <TimelineExplorer /> <ConceptMap />

Code Learning

<CodePlayground /> <DiffEditor /> <TaskRunner /> <SnippetCopy />

Quizzes & Active Recall

<QuickCheck /> <ConfidenceRating /> <HintLadder /> <MistakeAnalyzer />

Reading Support

<GlossaryPopover /> <Callout /> <WorkedExample />

Typography in Learning Context

Element	What It Means	Style
Big heading	"What you're doing"	text-heading-{32|24} semibold, negative tracking
Small label	"Where you are"	text-label-{14|12} gray-400
Mono	"What the computer sees"	text-copy-14-mono or text-label-14-mono
Body	Reading content	text-copy-14 or text-copy-16, max-w-2xl

Layout Patterns

Context	Max Width	Structure
Reading content	max-w-2xl / max-w-4xl	Single column, comfortable line length
Interactive lab	max-w-6xl	Two panels: explanation + playground
Full explorer	max-w-7xl	Three zones: nav + content + lab panel

App Router Structure

/                                    → Landing / course picker
/learn                               → Course catalog + resume
/learn/[courseSlug]                   → Course overview, modules, progress
/learn/[courseSlug]/[moduleSlug]      → Module overview
/learn/[courseSlug]/[moduleSlug]/[lessonSlug]  → Lesson shell

File Organization

content/courses/<courseSlug>/course.json       → Metadata, module order
content/courses/<courseSlug>/<module>/<lesson>.mdx  → Lesson content
components/learning/                           → Reusable learning components
lib/learning/progress.ts                       → Schema + storage adapters
lib/learning/grading.ts                        → Quiz validation, code tests
lib/learning/spaced.ts                         → Review scheduling

References

• references/lesson-shell.md — LessonShell, ProgressRail, StepFlow, CheckpointCard, ResumeBanner TSX patterns
• references/explorable-explanations.md — ParameterDock, LiveOutputPanel, ConceptExplorer, InteractiveDiagram, BeforeAfterSplit, TimelineExplorer, ConceptMap
• references/code-learning.md — CodePlayground (read-only/guided/free), DiffEditor, TaskRunner, SnippetCopy
• references/quiz-assessment.md — QuickCheck, ConfidenceRating, HintLadder, MistakeAnalyzer with feedback patterns
• references/reading-support.md — GlossaryPopover, Callout variants, WorkedExample with stepwise reveal
• references/pedagogical-framework.md — The Learning Loop doctrine, progressive disclosure rules, aha patterns, scaffolded complexity
• references/architecture.md — Next.js App Router routing, MDX content system, state management, file organization
• references/progress-state.md — Progress schema, localStorage adapter, spaced repetition, URL state for explorations
• references/learning-animations.md — Step transitions, feedback reveals, diagram animations, reduced-motion compliance