# 2026-10-30 — ledger: commits-by-author-day census

**What:** a table of commits grouped by (author date, author) with per-group
counts, extracted (frozen snapshot) from git revision `844c55a`.

**Scope:** the 2,245 commits reachable from revision `844c55a` on `main`.
Author date (short `YYYY-MM-DD`) + author name per commit. The revision is
frozen so the artifact does not drift as the repo gains commits.

## Extraction command (canonical source of truth)

```
git log --format='%ad%x00%an' --date=short 844c55a
```

Split each line on the NUL delimiter into `date` + `author`; count per
`(date, author)`; sort by date, then author.

## Result summary

- Total commits (frozen revision `844c55a`): **2245**
- (date, author) groups: **227**
- Distinct authors: **23**
- Distinct dates: **36**

The full table is the TSV artifact below. Example rows:

```
2026-09-24  Zephyrus Sparkborn 7
2026-09-24  rockachopa 1
2026-09-24  timmy 23
```

## Files

| file | role |
|------|------|
| `2026-10-30-commits-by-author-day.tsv` | the artifact (header + 227 rows) |
| `verify_commits_by_author_day.py` | byte-for-byte CHECK: re-derives from git revision 844c55a, exits 0 iff identical |