fix(agent hooks): wire hooks into real harness entry points and fix payload parsing

Claude Code never reads a standalone .claude/hooks.json, so the PostToolUse and
Stop pipeline is moved into .claude/settings.json and hooks.json is removed;
.cursor/hooks.json is rewritten in Cursor's version+afterFileEdit/stop schema;
.codex/hooks.json is already Codex-valid and stays. The shared scripts now
parse both the Cursor file_path and Claude/Codex tool_input.file_path stdin
shapes and normalize absolute paths, so the format, yarn-install, and
react-pattern-review hooks stop being silent no-ops. verify.sh blocks with
exit 2 plus a stderr reason, guards stop_hook_active, and skips clean trees;
react-pattern-review surfaces its reminder via hookSpecificOutput on
PostToolUse; sync-git-branches no longer misreports open PRs as merged. The
validator now checks that the three harness-specific entry points wire the
same hook scripts instead of requiring byte-identical hooks.json copies.

.cursor/hooks.json

@@ -1,52 +1,16 @@
 {
+  "version": 1,
   "hooks": {
-    "PostToolUse": [
-      {
-        "matcher": "Edit|Write|apply_patch",
-        "hooks": [
-          {
-            "type": "command",
-            "command": "bash \"$(git rev-parse --show-toplevel)/.cursor/hooks/format.sh\"",
-            "timeout": 10
-          },
-          {
-            "type": "command",
-            "command": "bash \"$(git rev-parse --show-toplevel)/.cursor/hooks/yarn-install.sh\"",
-            "timeout": 120
-          },
-          {
-            "type": "command",
-            "command": "bash \"$(git rev-parse --show-toplevel)/.cursor/hooks/react-pattern-review.sh\"",
-            "timeout": 10
-          }
-        ]
-      }
+    "afterFileEdit": [
+      { "command": "./.cursor/hooks/format.sh" },
+      { "command": "./.cursor/hooks/yarn-install.sh" },
+      { "command": "./.cursor/hooks/react-pattern-review.sh" }
     ],
-    "Stop": [
-      {
-        "hooks": [
-          {
-            "type": "command",
-            "command": "bash \"$(git rev-parse --show-toplevel)/.cursor/hooks/sync-git-branches.sh\"",
-            "timeout": 60
-          },
-          {
-            "type": "command",
-            "command": "bash \"$(git rev-parse --show-toplevel)/.cursor/hooks/react-pattern-review.sh\"",
-            "timeout": 10
-          },
-          {
-            "type": "command",
-            "command": "bash \"$(git rev-parse --show-toplevel)/.cursor/hooks/code-quality-review-reminder.sh\"",
-            "timeout": 10
-          },
-          {
-            "type": "command",
-            "command": "bash \"$(git rev-parse --show-toplevel)/.cursor/hooks/verify.sh\"",
-            "timeout": 60
-          }
-        ]
-      }
+    "stop": [
+      { "command": "./.cursor/hooks/sync-git-branches.sh" },
+      { "command": "./.cursor/hooks/react-pattern-review.sh" },
+      { "command": "./.cursor/hooks/code-quality-review-reminder.sh" },
+      { "command": "./.cursor/hooks/verify.sh" }
     ]
   }
 }