diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index 03bd5be..82077f1 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "wb-plc",
   "description": "Wiren Board controller skills — operate, configure, troubleshoot WB hardware via SSH and wb-cli.",
-  "version": "1.13.2",
+  "version": "1.13.3",
   "author": {
     "name": "Wiren Board",
     "url": "https://wirenboard.com"
diff --git a/debian/changelog b/debian/changelog
index 3818c3f..32599e7 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,12 @@
+wb-cli (1.8.16) stable; urgency=medium
+
+  * wb-plc plugin bumped to 1.13.3. wb-dev codestyle reference: the
+    Python key-differences summary now includes the multi-line
+    docstring rule (nothing after the opening triple quotes, closing
+    quotes on their own line), mirroring wirenboard/codestyle PR #123.
+
+ -- Ilya Tikhonyuk <ilya.tikhonyuk@wirenboard.com>  Tue, 15 Jul 2026 13:00:00 +0300
+
 wb-cli (1.8.15) stable; urgency=medium
 
   * No functional changes. wb-plc plugin bumped to 1.13.2: new wb-serial
diff --git a/pyproject.toml b/pyproject.toml
index 1418764..00047f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "wb-cli"
-version = "1.8.15"
+version = "1.8.16"
 description = "Command-line interface to a Wiren Board controller"
 requires-python = ">=3.9"
 authors = [{name = "Wiren Board Team", email = "info@wirenboard.com"}]
diff --git a/wb-plc/skills/wb-dev/references/codestyle.md b/wb-plc/skills/wb-dev/references/codestyle.md
index c6d3d48..0a96013 100644
--- a/wb-plc/skills/wb-dev/references/codestyle.md
+++ b/wb-plc/skills/wb-dev/references/codestyle.md
@@ -35,6 +35,7 @@ Base: PEP8. Key differences:
 - **Double quotes** for strings: `"string"` (not `'string'`)
 - Type annotations required
 - Trailing comma after last element in multi-line collections
+- Docstrings are **always multi-line**, even for a one-sentence text: nothing on the line after the opening `"""`, text starts on the next line, closing `"""` on its own line. Not enforced by the linters — reviewers check it
 
 **Tools — run before every commit:**
 
diff --git a/wb_cli/__init__.py b/wb_cli/__init__.py
index c01b838..15f0ae6 100644
--- a/wb_cli/__init__.py
+++ b/wb_cli/__init__.py
@@ -1 +1 @@
-__version__ = "1.8.15"
+__version__ = "1.8.16"