Development record

.abcd/development/brief/04-surfaces/08-abcd.md:5-7, 37 and 465-466 call the board strictly read-only and say the version answer writes nothing. Where ~/.abcd.noindex exists without its marker, every command but the status line first writes ~/.abcd.noindex/.gitignore and gitignore-laid (internal/surface/cli/cli.go:7247, layHomeIgnore in internal/surface/cli/homestop.go:176; .abcd/development/brief/05-internals/03-configuration.md:1202). Nothing is written in the repository, and nothing at all when the folder is absent.