Add CUPS print server container for Brother HL-4150CDN

.opencode/skills/jujutsu/references/REFINE_COMMIT.md

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+### Squashing Changes
+
+`jj squash` moves changes from one revision to another. The default is `@` → its parent; pass `--into` to target any other change.
+
+```bash
+# Default: squash @ into its parent
+jj squash
+
+# Squash @ into a specific change (not the parent)
+jj squash --into <change-id>
+jj squash -t <change-id>                  # short form
+
+# Squash a non-@ change into its parent
+jj squash -r <change-id>
+
+# Full explicit form: any source, any destination
+jj squash --from <source-id> --into <destination-id>
+
+# Squash only specific paths (the rest stay in the source)
+jj squash path/to/file.txt
+jj squash --into <change-id> src/auth/
+```
+
+**Combined description prompt**: if both source and destination have non-empty descriptions, `jj squash` opens an editor to pick a combined description — and hangs in agent environments. Always pass `-m` inline when squashing two described commits together:
+
+```bash
+jj squash --into <change-id> -m "feat: Combine auth changes"
+```
+
+**Empty source**: when squashing leaves the source revision empty (no content vs. its parent), jj abandons it by default. Pass `--keep-emptied` to keep an empty placeholder instead.
+
+**Interactive forms to avoid**: `jj squash -i` / `jj squash --interactive` open a TUI and will hang in agent environments. Use `--from` / `--into` / paths instead.
+
+### Splitting Commits
+
+**Warning**: `jj split` is interactive and will hang in agent environments. To divide a commit, use `jj restore` to move changes out, then create separate commits manually.
+
+### Absorbing Changes
+
+Automatically distribute changes to the commits that last modified those lines:
+
+```bash
+# Absorb working copy changes into appropriate ancestor commits
+jj absorb
+```
+
+### Abandoning Commits
+
+Remove a commit entirely (descendants are rebased to its parent):
+
+```bash
+jj abandon <change-id>
+```
+
+### Undoing Operations
+
+Reverse the last jj operation:
+
+```bash
+jj undo
+```
+
+This reverts the repository to its state before the previous command. Useful for recovering from mistakes like accidental `abandon`, `squash`, or `rebase`.
+
+### Restoring Files
+
+Discard changes to specific files or restore files from another revision:
+
+```bash
+# Discard all uncommitted changes in working copy (restore from parent)
+jj restore
+
+# Discard changes to specific files
+jj restore path/to/file.txt
+
+# Restore files from a specific revision
+jj restore --from <change-id> path/to/file.txt