01 / House vocabulary
Named words that may not be used
A block-capital heading asks for plain language and shows two rewritten examples. It then bans thirteen metaphors, including load-bearing, bless, wedge, and land, when a common domain term exists.
Source excerpt starting at line 140.140No-one knows what the hell a bootstrap-safe statement is. Everyone knows what "a statement that needs a table" is. Do141not use metaphorical language, such as the following terms: load-bearing, pin, bite, sharp, arm, guard, bless, wedge,142retire, retarget, answer, settle, carry, land. Do not make up terms if they have equivalents that are commonly used in the domain.
02 / Behavioral framing
A named debugging shortcut, ruled out
Tests failing after a change are defined as that change's regressions, to be debugged directly. Stashing or reverting to check whether they also fail on main is described as a waste of time and prohibited by name.
Source excerpt starting at line 122.1225. **Own your regressions.** If tests fail after your change, they are your regressions. Debug them directly. Never stash/revert to "check if they fail on main" — that wastes time and is categorically banned.
03
Reading order fixed top to bottom
A file should read from the top without jumping ahead: callers come first, callees follow, and a new helper goes below the functions that call it rather than at the end of the file. A three-line example shows the ordering.
04 / Hard prohibitions
Comments ruled out entirely
A two-line section bans comments and directs the effort into expressive code instead. Unlike guides that reserve comments for rationale, this one allows no exception.
Source excerpt starting at line 161.161- Do not add comments. Instead, focus on making your code expressive.
05
A test harness chosen by narrowness
Nine test directories are listed by purpose. Add coverage to the narrowest harness that can express the bug and extend an existing file when possible. Imported upstream golden tests stay unchanged for local behavior fixes.
06
A note about running inside CI
A closing section tells the agent it may be running in a GitHub Action with a turn limit, that pushing work in progress and continuing in another run is acceptable, and to avoid rabbit holes.