split projects 2/6: wf start makes code worktrees (.wf-home), wf next advice

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JEAjUkQRrCYX5MZhWxdtj2

1 files changed, 12 insertions, 4 deletions

diff --git a/wf.py b/wf.py
index 3a6babf..444cd37 100755
--- a/wf.py
+++ b/wf.py
@@ -392,6 +392,11 @@ def multi_lines(p: Project, args, lane: str, extra: int) -> list[str]:
     if wt:
         return [head + f"you are in worktree {p.cfg.rel(wt[0])} (branch {config.git_branch(wt[1])}); "
                        "wf writes the main tree's TASKS.md"]
+    if code := config.code_main(p.cfg):
+        master = config.git_branch(code / ".git") or "master"
+        cmd = f"wf start <task> --worktree {code / '.worktrees' / lane} --branch {lane}/<task>"
+        return [head + f"work in your lane's code worktree, never on {master}:",
+                f"  {cmd}  (run in {p.cfg.root}; wf there writes this TASKS.md)"]
     folder, master = p.cfg.root / ".worktrees" / lane, config.git_branch(main_top / ".git") or "master"
     cmd = (f"cd {p.cfg.rel(folder)} && git switch -c {lane}/<task> {master}" if folder.is_dir()
            else f"git worktree add {p.cfg.rel(folder)} -b {lane}/<task> {master}")
@@ -1424,7 +1429,8 @@ def cmd_start(args) -> int:
     p = load_project(args)
     id = p.resolve(args.id)
     main = Path(git_run(start, "rev-parse", "--show-toplevel").stdout.strip() or p.cfg.root)
-    master = config.git_branch(main / ".git") or "master"
+    repo = config.code_main(p.cfg) or main       # split project: worktree + branch in the code repo
+    master = config.git_branch(repo / ".git") or "master"
     wt = (Path.cwd() / args.worktree).resolve()
     shown = p.cfg.rel(wt)
     b = args.branch
@@ -1435,14 +1441,14 @@ def cmd_start(args) -> int:
             raise Failure(f"git {a[0]} failed: {(r.stderr.strip() or r.stdout.strip() or 'git error').splitlines()[-1]}")
         return r.stdout
 
-    has_branch = not git_run(main, "rev-parse", "--verify", "-q", f"refs/heads/{b}").returncode
+    has_branch = not git_run(repo, "rev-parse", "--verify", "-q", f"refs/heads/{b}").returncode
     extra = []
     if not wt.exists():
         if has_branch:
-            git_ok(main, "worktree", "add", "-q", str(wt), b)
+            git_ok(repo, "worktree", "add", "-q", str(wt), b)
             how = f"new, existing branch {b}: earlier WIP, read the notes"
         else:
-            git_ok(main, "worktree", "add", "-q", str(wt), "-b", b, master)
+            git_ok(repo, "worktree", "add", "-q", str(wt), "-b", b, master)
             how = f"new, branch {b} from {master}"
     else:
         dirty = git_run(wt, "status", "--porcelain").stdout.rstrip("\n")
@@ -1467,6 +1473,8 @@ def cmd_start(args) -> int:
             extra = [f"recovery: uncommitted:\n{dirty}" if dirty else "recovery: uncommitted: none",
                      f"recovery: commits {master}..HEAD:" + (f"\n{log}" if log else " none")]
     print(f"worktree: {shown} ({how})", *extra, sep="\n", flush=True)
+    if repo != main:
+        (wt / config.WF_HOME).write_text(f"{p.cfg.root}\n")
     try:
         here = wt / p.cfg.root.relative_to(main)
     except ValueError: