chore: fix root_dir resolution/stale scripts during PR review

.agents/skills/merge-pr/SKILL.md

@@ -19,6 +19,7 @@ Merge a prepared PR only after deterministic validation.
 - Never use `gh pr merge --auto` in this flow.
 - Never run `git push` directly.
 - Require `--match-head-commit` during merge.
+- Wrapper commands are cwd-agnostic; you can run them from repo root or inside the PR worktree.
 
 ## Execution Contract
 

.agents/skills/review-pr/SKILL.md

@@ -18,6 +18,7 @@ Perform a read-only review and produce both human and machine-readable outputs.
 
 - Never push, merge, or modify code intended to keep.
 - Work only in `.worktrees/pr-<PR>`.
+- Wrapper commands are cwd-agnostic; you can run them from repo root or inside the PR worktree.
 
 ## Execution Contract
 

scripts/pr

@@ -2,6 +2,18 @@
 
 set -euo pipefail
 
+# If invoked from a linked worktree copy of this script, re-exec the canonical
+# script from the repository root so behavior stays consistent across worktrees.
+script_self="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/$(basename "${BASH_SOURCE[0]}")"
+script_parent_dir="$(dirname "$script_self")"
+if common_git_dir=$(git -C "$script_parent_dir" rev-parse --path-format=absolute --git-common-dir 2>/dev/null); then
+  canonical_repo_root="$(dirname "$common_git_dir")"
+  canonical_self="$canonical_repo_root/scripts/$(basename "${BASH_SOURCE[0]}")"
+  if [ "$script_self" != "$canonical_self" ] && [ -x "$canonical_self" ]; then
+    exec "$canonical_self" "$@"
+  fi
+fi
+
 usage() {
   cat <<USAGE
 Usage:
@@ -38,9 +50,18 @@ require_cmds() {
 }
 
 repo_root() {
-  # Resolve canonical root from script location so wrappers work from root or worktree cwd.
+  # Resolve canonical repository root from git common-dir so wrappers work
+  # the same from main checkout or any linked worktree.
   local script_dir
+  local common_git_dir
   script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+  if common_git_dir=$(git -C "$script_dir" rev-parse --path-format=absolute --git-common-dir 2>/dev/null); then
+    (cd "$(dirname "$common_git_dir")" && pwd)
+    return
+  fi
+
+  # Fallback for environments where git common-dir is unavailable.
   (cd "$script_dir/.." && pwd)
 }
 

scripts/pr-merge

@@ -2,6 +2,13 @@
 set -euo pipefail
 
 script_dir="$(cd "$(dirname "$0")" && pwd)"
+base="$script_dir/pr"
+if common_git_dir=$(git -C "$script_dir" rev-parse --path-format=absolute --git-common-dir 2>/dev/null); then
+  canonical_base="$(dirname "$common_git_dir")/scripts/pr"
+  if [ -x "$canonical_base" ]; then
+    base="$canonical_base"
+  fi
+fi
 
 usage() {
   cat <<USAGE
@@ -13,7 +20,7 @@ USAGE
 }
 
 if [ "$#" -eq 1 ]; then
-  exec "$script_dir/pr" merge-verify "$1"
+  exec "$base" merge-verify "$1"
 fi
 
 if [ "$#" -eq 2 ]; then
@@ -21,10 +28,10 @@ if [ "$#" -eq 2 ]; then
   pr="$2"
   case "$mode" in
     verify)
-      exec "$script_dir/pr" merge-verify "$pr"
+      exec "$base" merge-verify "$pr"
       ;;
     run)
-      exec "$script_dir/pr" merge-run "$pr"
+      exec "$base" merge-run "$pr"
       ;;
     *)
       usage

scripts/pr-prepare

@@ -8,7 +8,14 @@ fi
 
 mode="$1"
 pr="$2"
-base="$(cd "$(dirname "$0")" && pwd)/pr"
+script_dir="$(cd "$(dirname "$0")" && pwd)"
+base="$script_dir/pr"
+if common_git_dir=$(git -C "$script_dir" rev-parse --path-format=absolute --git-common-dir 2>/dev/null); then
+  canonical_base="$(dirname "$common_git_dir")/scripts/pr"
+  if [ -x "$canonical_base" ]; then
+    base="$canonical_base"
+  fi
+fi
 
 case "$mode" in
   init)

scripts/pr-review

@@ -1,3 +1,13 @@
 #!/usr/bin/env bash
 set -euo pipefail
-exec "$(cd "$(dirname "$0")" && pwd)/pr" review-init "$@"
+
+script_dir="$(cd "$(dirname "$0")" && pwd)"
+base="$script_dir/pr"
+if common_git_dir=$(git -C "$script_dir" rev-parse --path-format=absolute --git-common-dir 2>/dev/null); then
+  canonical_base="$(dirname "$common_git_dir")/scripts/pr"
+  if [ -x "$canonical_base" ]; then
+    base="$canonical_base"
+  fi
+fi
+
+exec "$base" review-init "$@"