GDG Coding Jams
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Track 05

Mood Jar

Type how you're feeling → a little token drops into your jar.

✅ Drop-in friendly2-hour jamShips in 45 min
🫙
Open the Codelab ↗Starter repoDemo videoShare your build →
The demo

What it looks like when it’s working

In the room · 45 minutes

What you’ll build

One text box: type what's on your mind. AI generates a mood sticker/item — kawaii emoji, glowing orb, tiny potion, pixel-art object — and drops it into a visual 'jar' on the page. The jar fills up as you keep writing.

The moment it clicks

“My scattered thoughts just turned into a cute little token in my jar.”

Things to think about

While you build

  • The visual aesthetic of the tokens IS the soul of the app. Kawaii emojis, glowing orbs, tiny potions, pixel-art objects — pick a vibe and stay there.
  • The jar is a simple container today. No physics, no falling animations, no settling — that's the polished version. Items just appear inside.
  • No persistence across sessions. The 'jar that fills over weeks' is the magical polished version — leave it as a reason to come back.
  • One token per submission. Don't generate a grid of options. The serendipity of one is part of the feel.
The 2-hour Jam rhythm

How the night flows

Every Coding Jam follows the same five-phase shape. Talking is short, building is long.

  1. 0:00 – 0:05
    Intro

    Welcome, name tags, snacks within reach. The facilitator sets the tone: low pressure, high creativity, ship something messy.

  2. 0:05 – 0:15
    The Demo

    Facilitator demos the polished version of tonight's project. Live or pre-recorded. The message: this is what's possible.

  3. 0:15 – 0:25
    Spec Talk

    Walk the 5 questions on the projector. The output is a one-page PRD that Antigravity will turn into UI + engineering docs.

  4. 0:25 – 1:30
    Build (codelab)

    Participants run the codelab. Antigravity writes the code; they direct it. Six phases inside this hour: Setup → Plan → Review → Build → API → Verify. Fix the doc, not the code.

  5. 1:30 – 2:00
    Sharing

    Three volunteer screen-shares. Celebrate the messy, brilliant, half-finished prototypes. Quick wrap-up. Tease the next jam.

Polished version pulls in

Where to take it after the jam

The 45-minute build is the win in the room. These are the ideas you can pull in over the next week — your homework isn’t homework, it’s the polished version.

  • Local storage so the jar persists
  • Animated physics (tokens settle, jar tilts)
  • Multi-day pattern detection
  • Cross-device sync
  • Mood history charts
  • Share-your-jar mode
  • Voice memo input
If you get stuck

Open one of these in the starter — safety nets, not requirements.

  • context/persona-prompt-pattern.md
From the community

Builds shipped from this track

All builds from this track →
Mood Jar AI
Track 05Solo — New York, NY
Mood Jar AI
Neethu

An interactive digital mood jar app that transforms daily emotions into preserved, glowing memory notes. Users record their current state of mind to receive instant AI reflections, visual vibe tracking, and mood history visualization directly in the browser.

“I was surprised by how a simple visual UI transformation and lightweight client-side state could instantly make emotion-tracking feel so tactile, playful, and engaging.”

Live demo ↗
RepoVideo
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