bulk‐rewriting commit authors

bulk‐rewriting commit authors.txt

install `pip install git-filter-repo`

### 1) Create a mailmap file

In your repo root, create e.g. `rewrite-mailmap.txt` with **Git’s mailmap syntax**, e.g.:

```
# Format:  Proper Name <proper@email>  <old@email>
Your New Name <[email protected]>  <[email protected]>
```

### 2) Run git-filter-repo with --mailmap

```bash
# (–force is only needed if you’ve already filtered this repo before)
git filter-repo --mailmap rewrite-mailmap.txt --force
```