yakooha / lab
Every product we build leaves behind a mechanism worth keeping. There are 15 here. Each one is a working model, not a diagram: take it offline, post to it, break it.
Pick an experiment on the left. Press J and K to step through them. Figures inside a model are simulated to show behaviour; they are not production measurements.
lab / sync / offline-first action queue
Every tap is a command. Offline, commands queue locally; on reconnect they replay in order, conflict-safe.
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lab / data / double-entry ledger
Balances are derived from postings, never stored. Money can't be created or lost, only moved.
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lab / reliability / idempotent money movement
Every mutation carries a key. Retry the same request a hundred times, the transfer happens once.
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lab / realtime / crdt multiplayer
Edits merge without a server deciding who wins. Offline changes fold in cleanly when you're back.
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lab / product logic / conviction scoring
A portfolio number from confidence × horizon × effort, recomputed on every change so the plan ranks itself.
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lab / data / pre-aggregated analytics
Raw events land in Kafka and compact into ClickHouse materialised views, so a dashboard reads a few pre-aggregated rows instead of scanning every event.
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lab / graphics / gpu grading in the browser
Colour grades are WebGL shaders applied per frame on a zero-copy path. The preview is graded live in the browser, no render farm.
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lab / product logic / interval-tree availability
Rooms, tables and terraces are one availability graph. Double-booking is impossible, not just unlikely.
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lab / ops / incident state machine
Open → acknowledged → mitigated → resolved, with every transition audited and every timer explicit.
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lab / interface / zero-lag editor with history
Input is committed locally on the same frame; snapshots are versioned in the background.
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lab / design systems / token pipeline
One source of truth compiles to CSS, iOS and print. Every visual diff gates a pull request.
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lab / performance / edge-rendered commerce
Storefront rendered on Cloudflare Workers with persisted GraphQL queries, so pages are assembled close to the shopper instead of at one distant origin.
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lab / data / blended attribution
Meta spend and organic search normalised in one dbt model, so ROAS is defined once and pacing rules act on it.
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lab / product logic / rights-attached approvals
Approving a post signs its usage window. Payout escrow releases on the same event.
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lab / realtime / realtime order feed
Orders stream to the maker's phone over channels; status changes fan out to buyers instantly.
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Tell us what it has to do. We will tell you how we would build it.