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The starter track is free — read all lessons and practice for free. Full access to every track (current and future) is $14.99/month. Cancel anytime.

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Each track is designed as a 30-day challenge — one lesson per day, about 15 minutes each. Go at your own pace, but the structure is built around daily consistency.

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Each lesson is a student-teacher dialogue with code examples, followed by a hands-on code challenge in an in-browser editor. You read, you understand, then you write real code.

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Our beginner track starts from absolute zero — no prior experience needed. Advanced tracks build on earlier ones, and the platform tells you exactly where to start.

How is zuzu.codes different from freeCodeCamp or Codecademy?

zuzu.codes uses a structured 30-day track format with dialogue-based teaching, an in-browser code editor, and gamification (XP, streaks, progress tracking). The format builds genuine understanding through daily practice.

Day 29 · ~11 min●

Six lessons on patterns at scale: dead-letter handling, replay safety, Sheet-as-dashboard observability, cross-tool consistency drift detection, multi-step rollback, and the final 6-primitive synthesis.

Last quiz before graduation. Eight questions, 80% to pass.

What week 4 covered

Lesson	Concept	Key shape
22	Dead-letter handling	`for/else: dead_letter.append(...)` after MAX_RETRIES
23	Replay safety	run pipeline twice; final state identical
24	Observability dashboard	append run summary row to Sheet
25	Cross-tool consistency	`if state_a.get(id) != state_b.get(id): drift.append(...)`
26	Multi-step rollback	track `(name, undo_fn)`, `reversed` on except
27	Final synthesis	verify → parse → dedupe → dispatch → try-process → state-or-dlq

Graduation up next.

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Day 29 · ~11 min●

Last quiz before graduation. Eight questions, 80% to pass.

What week 4 covered

Lesson	Concept	Key shape
22	Dead-letter handling	`for/else: dead_letter.append(...)` after MAX_RETRIES
23	Replay safety	run pipeline twice; final state identical
24	Observability dashboard	append run summary row to Sheet
25	Cross-tool consistency	`if state_a.get(id) != state_b.get(id): drift.append(...)`
26	Multi-step rollback	track `(name, undo_fn)`, `reversed` on except
27	Final synthesis	verify → parse → dedupe → dispatch → try-process → state-or-dlq

Graduation up next.

What week 4 covered

Lesson	Concept	Key shape
22	Dead-letter handling	`for/else: dead_letter.append(...)` after MAX_RETRIES
23	Replay safety	run pipeline twice; final state identical
24	Observability dashboard	append run summary row to Sheet
25	Cross-tool consistency	`if state_a.get(id) != state_b.get(id): drift.append(...)`
26	Multi-step rollback	track `(name, undo_fn)`, `reversed` on except
27	Final synthesis	verify → parse → dedupe → dispatch → try-process → state-or-dlq

Graduation up next.

What week 4 covered

Lesson	Concept	Key shape
22	Dead-letter handling	`for/else: dead_letter.append(...)` after MAX_RETRIES
23	Replay safety	run pipeline twice; final state identical
24	Observability dashboard	append run summary row to Sheet
25	Cross-tool consistency	`if state_a.get(id) != state_b.get(id): drift.append(...)`
26	Multi-step rollback	track `(name, undo_fn)`, `reversed` on except
27	Final synthesis	verify → parse → dedupe → dispatch → try-process → state-or-dlq

Graduation up next.