The other books
This book is about running the ikigai binary. What it runs is taught elsewhere:
The ikigai Book teaches resources, spaces, capabilities and golden threads from the
first endpoint up, and it is where to go when a chapter here uses one of those words.
The gonk Book covers gonk, the work ledger and review host composed from the
same pieces, with its own doors and QUIC client; Building ikigai UIs builds
views as resources; and The ikigai Architecture shows how the pieces
fit.
The library lists all five, with who each is for, what to read first and where to start.
The books are built, tested and published together, from one repository: https://github.com/ikigai-rs/ikigai-tutorial.