diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4779cc5..0be2a54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [0.18.2] - 2026-02-18
+
+### Added
+
+- Added `codex_cli_path` global config option and `TAKT_CODEX_CLI_PATH` environment variable to override the Codex CLI binary path used by the Codex SDK (#292)
+  - Supports strict validation: absolute path, file existence, executable permission, no control characters
+  - Priority: `TAKT_CODEX_CLI_PATH` env var > `codex_cli_path` in config.yaml > SDK vendored binary
+
 ## [0.18.1] - 2026-02-18
 
 ### Added
diff --git a/README.md b/README.md
index 5541c67..9c7bfda 100644
--- a/README.md
+++ b/README.md
@@ -612,6 +612,11 @@ anthropic_api_key: sk-ant-...  # For Claude (Anthropic)
 # openai_api_key: sk-...       # For Codex (OpenAI)
 # opencode_api_key: ...        # For OpenCode
 
+# Codex CLI path override (optional)
+# Override the Codex CLI binary used by the Codex SDK (must be an absolute path to an executable file)
+# Can be overridden by TAKT_CODEX_CLI_PATH environment variable
+# codex_cli_path: /usr/local/bin/codex
+
 # Builtin piece filtering (optional)
 # builtin_pieces_enabled: true           # Set false to disable all builtins
 # disabled_builtins: [magi, passthrough] # Disable specific builtin pieces
diff --git a/docs/CHANGELOG.ja.md b/docs/CHANGELOG.ja.md
index dda378d..5536fd8 100644
--- a/docs/CHANGELOG.ja.md
+++ b/docs/CHANGELOG.ja.md
@@ -6,6 +6,14 @@
 
 フォーマットは [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) に基づいています。
 
+## [0.18.2] - 2026-02-18
+
+### Added
+
+- グローバル設定に `codex_cli_path` オプションと `TAKT_CODEX_CLI_PATH` 環境変数を追加 — Codex SDK が使用する CLI バイナリのパスを上書き可能に (#292)
+  - 厳密なバリデーション付き: 絶対パス、ファイル存在確認、実行権限、制御文字の禁止
+  - 優先順位: `TAKT_CODEX_CLI_PATH` 環境変数 > config.yaml の `codex_cli_path` > SDK 同梱バイナリ
+
 ## [0.18.1] - 2026-02-18
 
 ### Added
diff --git a/docs/README.ja.md b/docs/README.ja.md
index 1cba7f1..a57d610 100644
--- a/docs/README.ja.md
+++ b/docs/README.ja.md
@@ -612,6 +612,11 @@ anthropic_api_key: sk-ant-...  # Claude (Anthropic) を使う場合
 # openai_api_key: sk-...       # Codex (OpenAI) を使う場合
 # opencode_api_key: ...        # OpenCode を使う場合
 
+# Codex CLI パスの上書き（オプション）
+# Codex SDK が使用する CLI バイナリを上書き（実行可能ファイルの絶対パスを指定）
+# 環境変数 TAKT_CODEX_CLI_PATH で上書き可能
+# codex_cli_path: /usr/local/bin/codex
+
 # ビルトインピースのフィルタリング（オプション）
 # builtin_pieces_enabled: true           # false でビルトイン全体を無効化
 # disabled_builtins: [magi, passthrough] # 特定のビルトインピースを無効化
diff --git a/package-lock.json b/package-lock.json
index 839a403..eeb69f0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "takt",
-  "version": "0.18.1",
+  "version": "0.18.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "takt",
-      "version": "0.18.1",
+      "version": "0.18.2",
       "license": "MIT",
       "dependencies": {
         "@anthropic-ai/claude-agent-sdk": "^0.2.37",
diff --git a/package.json b/package.json
index 4692a91..4cb1776 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "takt",
-  "version": "0.18.1",
+  "version": "0.18.2",
   "description": "TAKT: TAKT Agent Koordination Topology - AI Agent Piece Orchestration",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",