Add CUPS print server container for Brother HL-4150CDN

.opencode/skills/jujutsu/references/NEW_CHANGE.md

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+# Starting a New Change
+
+The jj workflow is: **describe first, then code, then refine**. The working copy is always a commit (`@`), so you're already in one when you start. The question is whether to reuse it or start fresh.
+
+## The opening sequence
+
+```bash
+# 1. Check what @ currently looks like
+jj st
+```
+
+**If `@` is empty** (no changes, no description set, or description is fine to discard):
+- Reuse it. Just describe and start.
+
+**If `@` has changes you want to keep** (it's someone else's WIP, or work you haven't finished):
+- Start fresh with `jj new` — this creates a new empty commit on top of `@`.
+
+```bash
+# 2. Describe before coding (only with -m; never editor-based)
+jj desc -m "feat: Add user authentication to login endpoint"
+
+# 3. Make changes — they snapshot to @ automatically on the next jj command
+#    (no `jj add`, no `jj commit` needed)
+
+# 4. Verify
+jj st
+```
+
+## Why describe first
+
+Setting the message up front:
+- Forces you to articulate the change as one logical unit before writing code (atomic commits)
+- Means there's never a phase where `@` says "(no description set)"
+- Makes the change navigable in `jj log` while it's still being built
+
+See `references/COMMIT_MSG.md` for the message format conventions.
+
+## After the change is done
+
+**Do NOT run `jj new` to "close" the change.** In jj, the working copy is always a commit — there's no separate commit step. Leave `@` as-is; the *next* task's step 1 (`jj st` → reuse or `jj new`) handles transition.
+
+If refinement is needed (split, squash, absorb, abandon), see `references/REFINE_COMMIT.md`.
+
+## Anti-patterns
+
+- ❌ `jj commit` — doesn't exist; the working copy is already a commit
+- ❌ `jj desc` without `-m` — opens an editor; will hang in non-interactive agent environments
+- ❌ Running `jj new` at the end of a task — leaves an empty `@` for the next agent to clean up
+- ❌ Starting code before describing — you'll forget to describe, or describe vaguely after the fact