The catalog
Every area, every level. Filter from the top of the list, or just scroll.
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Start where you're least comfortable — each area is independent and self-contained.
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0 / 6 areasDay-one engineering fundamentals. Pick any one — each is self-contained and assumes zero prior context.
- Git Basics
- The Terminal
- HTTP Fundamentals
- + 6 more
- Variables & Assignment
- Control Flow
- Functions
- + 6 more
- PATH & Environment
- Processes & Signals
- Permissions & Ownership
- + 6 more
- Workflow
- History
- Collaboration
- + 6 more
- HTTP Methods Deep Dive
- Status Codes
- API Auth Patterns
- + 6 more
Engineering craft
0 / 6 areasThe day-to-day toolkit of shipping software — frontend, data, delivery pipelines, reliability, and admin.
Languages
0 / 5 areasPick a language and learn its idioms end-to-end — types, control flow, the standard library, and the patterns the community has settled on.
Platforms & theory
0 / 8 areasWhere code runs and the ideas under it — runtimes, containers, clouds, AI, algorithms, and data structures.
Cryptography
0 / 6 areasFrom encoding basics through classical ciphers to modern AES/RSA/hashing and applied protocols.
Security practice
0 / 2 areasApplied defense: password storage, password cracking, and the web attacker's playbook.