Development log

What was decided, when and why, reversals included, written during the work.

The development log records decisions rather than commits: not what changed, which the version history already says, but why it changed that way, and what the alternative cost.

It is written during the work, not reconstructed afterwards, so the reversals are in it, each with the measurement that forced it.

The log is one file in the repository, published here year by year. Entries are newest first, each one dated, and each date can be checked against the history of the repository.

Source: docs/JOURNAL.md in the public repository; this page is a copy of it, not a summary.