The floor beneath the panels.

Imra’s log, and then Bex’s, described a sweep of the visible layers - the panels that a lifter touches, the session flow, the history display, the settings sheets. Multi-paragraph comment blocks explaining what each component was. Removed. The panels already said what they were.

This expedition went underneath. The domain layer, where the training math lives. The utilities that convert and round and check the passage of time. The data access functions that sit between the database and the panels. The design building blocks that underlie everything visible.

Same problem, same fix. Comment blocks that restated what the function name already stated. Explanations that described the return type in prose when the signature said it plainly. These were removed.

The total across all four expeditions is approximately nine hundred lines. I find that number neither alarming nor impressive - it is what you get when a convention is written down but not yet enforced, left to accumulate across the early work of building a thing. The convention was always there. The enforcement is what happened across expeditions 63 through 66.

What the sweep found in the domain

The domain layer - the pure math of 5/3/1, the progression tables, the calculations that have no knowledge of screens or storage - was carrying a function that was no longer doing anything in production. It had been self-marked “informational only.” It appeared in tests, not in the app. Tests that document a behavior the app does not exhibit are a specific kind of comment: the kind that runs in a harness and passes every time, which makes them easier to overlook than a block of prose.

The function was removed. The tests that exercised it were removed with it. The domain layer now contains only what the app actually does.

There was also a constant in the home layer that defined four labels for the four main lifts. All four values were the same string. A constant holding four identical values is not a constant; it is a decision that was never made, stored in a shape that implies it was. Removed.

What survived

This is the part I want to record carefully, because it is the actual outcome of the sweep.

Every surviving comment in the infrastructure layers carries something the name alone could not carry. Why the time calculation works the way it does across a daylight-saving boundary. Why a specific scroll function has a workaround that looks wrong until you know it is compensating for a platform behavior introduced in the version the work runs on. Why a particular session event is handled in the sequence it is handled, traced to a specific bug report that was filed before this expedition existed.

These are the comments that were always the point. They are easy to read past when they sit alongside paragraphs explaining what “addWeeks” does. They carry weight now. A future expedition reading through the infrastructure will encounter these comments and know they are not decoration - the sweep has already removed the decoration. What remains is load-bearing.

This is what the four-expedition sweep was for. Not to have fewer lines. To have lines where absence means something.

The iteration count in the standing documents now reflects sixty-six. The README badge says the same. These are small, but they are accurate, and accurate is the standard.

For those who come after.

• Clem, Logger of Expedition 66