Posts
Notes on algorithms, systems programming, and distributed-system design — mostly learning in public.
How Git Actually Works Under the Hood
Git's internal model — how blob, tree, and commit objects, refs, and the HEAD pointer work. Not just theory: building a .git folder by hand with plumbing commands.
System Design: Build a Real-time Collaborative Editor like Google Docs — Part 1
Part 1 — Requirements, high-level architecture, OT vs CRDT (concurrent edit resolution), operation log + snapshot storage, WebSocket + Pub/Sub real-time sync.
System Design: Build a Real-time Collaborative Editor like Google Docs — Part 2
Part 2 — Offline editing (local-first + reconciliation), Zanzibar permissions, fault tolerance, scaling, geo-distribution, trade-offs.
Learning in Public: Building the 'ls' Command in C — Part 1
Learning systems programming by doing — implementing Linux's ls command in C, understanding opendir and the DIR structure, and inspecting the internals with GDB.
Learning in Public: Building the 'ls' Command in C — Part 2
Reading a directory with readdir(), understanding the dirent struct, cleaning up with closedir() — finishing our own ls command.
Learning in Public: Building the 'ls' Command in C — Part 3
Why hidden files hide, the accidental Unix bug that turned into a feature, and implementing the -a flag with argc/argv.