Add Codex equivalent of the some Claude Code configurations

.agents/skills

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+../.claude/skills

.codex/hooks.json

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+{
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "\"$(git rev-parse --show-toplevel)/Scripts/codex-hooks/swift-format-and-lint.sh\"",
+            "timeout": 60,
+            "statusMessage": "Formatting and linting Swift..."
+          }
+        ]
+      }
+    ]
+  }
+}

Scripts/codex-hooks/swift-format-and-lint.sh

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+#!/bin/sh
+# Codex PostToolUse hook: format and lint Swift files edited through apply_patch.
+# Codex provides the applied patch in tool_input.command, while Claude Code provides
+# the edited path directly. Support both payloads so the hook remains easy to reuse.
+
+files=$(jq -r '
+    .tool_input.file_path? // empty,
+    ((.tool_input.command? // .tool_input.patch? // "") | split("\n")[] |
+        if startswith("*** Update File: ") then ltrimstr("*** Update File: ")
+        elif startswith("*** Add File: ") then ltrimstr("*** Add File: ")
+        else empty
+        end)
+' | awk '/\.swift$/ { print }' | sort -u)
+
+[ -n "$files" ] || exit 0
+
+for file in $files; do
+    [ -f "$file" ] || continue
+    xcrun swift format --in-place "$file" 2>/dev/null || true
+done
+
+command -v rake >/dev/null 2>&1 || exit 0
+
+status=0
+for file in $files; do
+    [ -f "$file" ] || continue
+    out=$(rake -s "lint[$file]" 2>&1)
+    if [ -n "$out" ]; then
+        echo "$out" >&2
+        status=2
+    fi
+done
+
+exit "$status"