Conceptual, architectural explainers - how a subsystem actually works underneath.
How to design a FreeBSD service around Capsicum descriptor rights, capability mode, process descriptors, and delegated Casper services.
How HAST replication modes, role changes, fencing, and CTL iSCSI targets fit together without confusing replication with failover.
How FreeBSD seeds Fortuna, harvests entropy, serves random bytes, and exposes early-boot failures without making unsafe assumptions.
How FreeBSD orders rc.d scripts, separates dependency order from enablement, and provides safe, testable service lifecycle hooks.
How FreeBSD routes path lookup and file operations through mounts, vnodes, namecache entries, and filesystem-specific VOP methods.
How Haiku BFS combines typed attributes, per-volume indexes, query predicates, live updates, B+trees, and journaling without becoming SQL.
A stage-by-stage guide to Haiku boot, from BIOS or UEFI handoff through packages, kernel initialization, launch_daemon, and recovery.
How Haiku's device manager matches modular drivers, builds a node tree, publishes /dev interfaces, handles removal, and limits support claims.
A source-grounded map of Haiku's kernel: teams and threads, virtual memory, IPC, scheduling, modules, system calls, drivers, and debugging.
How Haiku's native API is divided into cooperating Kits, with shared conventions for messages, ownership, status codes, linking, and threads.