Development record

docs/reference/README.md:3-4 presents the reference folder as describing configuration keys, environment variables and file schemas, and no page ever has: the folder holds the generated command reference, the writing style guide and the terminology crosswalk (the wording dates from 157e3ac1f). The proposed fix narrows the line, but the gap stays: keys a person sets by hand, such as load.preflights and reservation.github_username in ~/.abcd.noindex/config.json or rules.force_refresh_every_n in .abcd/config.json (internal/core/rules/inject.go:339-343), are documented only inside command help.