fix(rig-worktree): default worktrees to .claude/worktrees so the harness can manage them (#61)

scripts/remove-worktree.sh

@@ -8,7 +8,7 @@
 # Usage:
 #   remove-worktree.sh <path-or-branch> [options]
 #
-#   <path-or-branch>   Worktree path (e.g. .claude/rig-worktrees/feat-521-foo) or
+#   <path-or-branch>   Worktree path (e.g. .claude/worktrees/feat-521-foo) or
 #                      the branch checked out in it (e.g. alice/feat-521-foo).
 #
 # Options:
@@ -97,4 +97,10 @@ fi
 git -C "$MAIN" worktree prune >&2
 
 echo "removed $WT_PATH"
-echo "remove-worktree: removed $WT_PATH${KEEP_BRANCH:+ (kept branch)}" >&2
+# KEEP_BRANCH is "0" when unset — non-empty, so ${KEEP_BRANCH:+…} fires either
+# way. Compare it, or the script claims it kept a branch it just force-deleted.
+if [ "$KEEP_BRANCH" = "1" ]; then
+  echo "remove-worktree: removed $WT_PATH (kept branch)" >&2
+else
+  echo "remove-worktree: removed $WT_PATH${BRANCH:+ (deleted branch $BRANCH)}" >&2
+fi

scripts/setup-worktree.sh

@@ -19,7 +19,7 @@
 #                         e.g. from vcs.baseRef in .rig/config.json).
 #                         Pass origin/<integration-branch> for stacked children.
 #   --path <path>         Worktree path. Default:
-#                         .claude/rig-worktrees/<basename-of-branch>.
+#                         .claude/worktrees/<basename-of-branch>.
 #   --reuse               If the worktree (or branch) already exists, reuse it:
 #                         fetch + hard-reset to <base> instead of failing.
 #                         Without this, an existing path/branch is an error.
@@ -80,9 +80,12 @@ done
 MAIN=$(git worktree list --porcelain | awk '/^worktree / && !seen { print $2; seen=1 }')
 [ -n "$MAIN" ] || die "could not resolve main worktree root"
 
-# Default worktree path: .claude/rig-worktrees/<last segment of branch>.
+# Default worktree path: .claude/worktrees/<last segment of branch>. This is the
+# directory the Claude Code harness manages, so a worktree created here can be
+# adopted natively via EnterWorktree/ExitWorktree (a sibling .claude/rig-worktrees/
+# path could not). Override with --path.
 if [ -z "$WT_PATH" ]; then
-  WT_PATH="$MAIN/.claude/rig-worktrees/${BRANCH##*/}"
+  WT_PATH="$MAIN/.claude/worktrees/${BRANCH##*/}"
 fi
 # Normalize to absolute.
 case "$WT_PATH" in
@@ -125,10 +128,12 @@ if [ -d "$WT_PATH" ]; then
 else
   # Create the worktree. -B so an already-existing local branch is reset to
   # base rather than erroring; this matches a stacked integration-branch flow.
+  # git worktree add prints "HEAD is now at …" to stdout; route it to stderr so
+  # stdout carries only the final path line (the caller's `| tail -1` contract).
   if [ "$REUSE" = "1" ]; then
-    git -C "$MAIN" worktree add -B "$BRANCH" "$WT_PATH" "$BASE"
+    git -C "$MAIN" worktree add -B "$BRANCH" "$WT_PATH" "$BASE" >&2
   else
-    git -C "$MAIN" worktree add -b "$BRANCH" "$WT_PATH" "$BASE"
+    git -C "$MAIN" worktree add -b "$BRANCH" "$WT_PATH" "$BASE" >&2
   fi
 fi
 
@@ -137,13 +142,17 @@ fi
 # missing secrets look like flaky/timeout test failures, not "config not found".
 # Symlinks (not copies) so edits in MAIN propagate; ln -sfn is idempotent.
 echo "setup-worktree: symlinking env files..." >&2
-(
-  cd "$MAIN"
-  git ls-files --others --ignored --exclude-standard
-) | grep -v '/node_modules/' | grep -v '^node_modules/' \
-  | grep -v '\.example$' \
-  | grep -E '(^|/)\.env(\.[^/]+)?$' \
-  | while read -r f; do
+# `|| true` guards the whole filter chain: any grep stage that selects no lines
+# exits 1, and under `set -o pipefail` that would abort the script — but "this
+# repo has no .env files to link" is a normal outcome, not a failure.
+{
+  (
+    cd "$MAIN"
+    git ls-files --others --ignored --exclude-standard
+  ) | grep -v '/node_modules/' | grep -v '^node_modules/' \
+    | grep -v '\.example$' \
+    | grep -E '(^|/)\.env(\.[^/]+)?$' || true
+} | while read -r f; do
       mkdir -p "$WT_PATH/$(dirname "$f")"
       ln -sfn "$MAIN/$f" "$WT_PATH/$f"
     done

skills/rig-worktree/SKILL.md

@@ -7,7 +7,7 @@ allowed-tools: [Bash, Read]
 
 # Worktree — isolated dev checkout lifecycle
 
-Create / list / remove isolated git worktrees under `.claude/rig-worktrees/`.
+Create / list / remove isolated git worktrees under `.claude/worktrees/`.
 Creation produces a worktree that's actually ready to run: fetched from
 origin, branched from the right base, env files symlinked, dependencies
 installed. This is a shared bootstrap you can call directly (spikes,
@@ -59,8 +59,10 @@ only required argument.
 - `--base <ref>` — base to branch from. Default `vcs.baseRef`. For a
   stacked/integration child, pass `origin/<integration-branch>`.
 - `--path <path>` — worktree location. Default
-  `.claude/rig-worktrees/<last segment of branch>` (so `alice/feat-521-foo`
-  → `.claude/rig-worktrees/feat-521-foo`).
+  `.claude/worktrees/<last segment of branch>` (so `alice/feat-521-foo`
+  → `.claude/worktrees/feat-521-foo`). This is the directory the Claude Code
+  harness manages, so a worktree created here can be adopted natively via
+  `EnterWorktree`/`ExitWorktree`.
 - `--reuse` — if the worktree/branch already exists, fetch and
   hard-reset it to `<base>` instead of failing. Use this for a
   "reuse a child worktree" path.