diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index edb7d9c4..3d4bf4a0 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "commitlore",
   "displayName": "CommitLore",
-  "version": "1.7.2",
+  "version": "1.7.3",
   "description": "Recorded decisions from git history, delivered to the agent before it edits. Constraints, alternatives already ruled out, and warnings left by whoever was here last.",
   "author": {
     "name": "MongLong0214",
diff --git a/.codex-plugin/plugin.json b/.codex-plugin/plugin.json
index 42545df4..153ad9db 100644
--- a/.codex-plugin/plugin.json
+++ b/.codex-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "commitlore",
-  "version": "1.7.2",
+  "version": "1.7.3",
   "description": "Decision memory from Git history, with verified capture for coding sessions.",
   "author": {
     "name": "MongLong0214",
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 7a22fe3e..2f36ba66 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -16,6 +16,21 @@ updates:
       dev-dependencies:
         dependency-type: development
         update-types: [minor, patch]
+    ignore:
+      # `@types/node` tracks the oldest runtime this package supports, not the
+      # newest one that exists. `engines.node` is `>=22.23.2` and the dependency
+      # is pinned `^22.10.0` for that reason: types from a later major describe
+      # APIs node 22 does not have, and the type checker is the only thing that
+      # would refuse them -- a release would compile here and fail on a
+      # supported runtime. Dependabot opened the 22 -> 26 bump as #1151, which
+      # typechecked cleanly and was still wrong for that reason.
+      #
+      # A major bump here is therefore a decision about the support floor, made
+      # by hand together with `engines`, not a monthly pull request. Minor and
+      # patch updates inside the pinned major still arrive as usual, and a
+      # security advisory ignores this block entirely.
+      - dependency-name: '@types/node'
+        update-types: ['version-update:semver-major']
     commit-message:
       # Dependabot commits on GitHub's side, so the local commit-msg hook never
       # sees them. What does see them is the dogfooding gate, which validates
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4503b240..4ec3625e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,29 @@ Release notes for 1.0.0, 1.0.1 and 1.0.2 are on the
 [GitHub releases page](https://github.com/MongLong0214/commitlore/releases); they
 were not written here.
 
+## 1.7.3
+
+- **A trailer paragraph that carries no record is no longer inherited as one
+  (#1153).** Git reads a message's last paragraph as a trailer block whatever
+  its keys mean, so `squash-preserve` collected a merge commit whose only
+  trailer was `Claude-Session:` as an inherited record, stamped it
+  `Provenance: inherited <sha>`, and composed a message `commitlore validate`
+  then refused as `unknown-key` — blocking the squash merge it had been run to
+  protect. An inherited block now carries only the keys SPEC §3 defines, per
+  trailer rather than per block, so a paragraph that mixes `Limit:` with a
+  foreign key keeps its record and loses only the foreign key, and a block left
+  with nothing contributes nothing. The identity-collision check compares an
+  inherited copy by its record content, so a faithful copy of such a record is
+  no longer reported as `duplicate-id`.
+
+- **Dependencies.** `@modelcontextprotocol/sdk` 1.30.1, `js-yaml` 5.4.2 (dev),
+  and `docker/setup-qemu-action` v4.4.0 in CI. `@types/node` stays on 22.x:
+  `engines.node` is `>=22.23.2`, and types from a later major would admit APIs
+  that runtime does not have.
+
+This is a patch release: it repairs existing squash and validation behavior and
+adds no command, flag, trailer key, or host setting.
+
 ## 1.7.2
 
 - **Squash-preserved drafts validate against their reachable originals (#1147).**
diff --git a/README.ja.md b/README.ja.md
index 70106f3e..5e1e0286 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -47,18 +47,18 @@
 </p>
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 <details>
 <summary>先にインストーラーを読みたいですか？</summary>
 
 ```bash
-curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh
-sh install.sh v1.7.2
+curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh
+sh install.sh v1.7.3
 
 # あるいはスクリプトを使わずに。スクリプトが作るチェックアウトは自分でも作れます。
-git clone --depth 1 --branch v1.7.2 https://github.com/MongLong0214/commitlore
+git clone --depth 1 --branch v1.7.3 https://github.com/MongLong0214/commitlore
 node commitlore/dist/commitlore.mjs --version
 ```
 
@@ -107,13 +107,13 @@ CommitLore はその判断をコードのそばに残します。
 macOS と Linux:
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 Windows:
 
 ```powershell
-& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.ps1))) v1.7.2
+& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.ps1))) v1.7.3
 ```
 
 Node.js 22.23.2+ と Git が必要です。スクリプトは何かを書き込む前に両方を確認します。
@@ -294,11 +294,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           repository: MongLong0214/commitlore
-          ref: v1.7.2
+          ref: v1.7.3
           path: .commitlore-cli
           persist-credentials: false
 
-      - uses: MongLong0214/commitlore/action/preserve@v1.7.2
+      - uses: MongLong0214/commitlore/action/preserve@v1.7.3
         with:
           cli-path: .commitlore-cli/dist/cli.js
 ```
diff --git a/README.ko.md b/README.ko.md
index ea35d7dc..2fa7f626 100644
--- a/README.ko.md
+++ b/README.ko.md
@@ -47,18 +47,18 @@
 </p>
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 <details>
 <summary>먼저 설치기를 읽어 보고 싶나요?</summary>
 
 ```bash
-curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh
-sh install.sh v1.7.2
+curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh
+sh install.sh v1.7.3
 
 # 또는 스크립트를 건너뜁니다. 스크립트가 만드는 체크아웃은 직접 만들 수 있습니다.
-git clone --depth 1 --branch v1.7.2 https://github.com/MongLong0214/commitlore
+git clone --depth 1 --branch v1.7.3 https://github.com/MongLong0214/commitlore
 node commitlore/dist/commitlore.mjs --version
 ```
 
@@ -107,13 +107,13 @@ CommitLore는 그 판단을 코드 곁에 보관합니다.
 macOS와 Linux:
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 Windows:
 
 ```powershell
-& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.ps1))) v1.7.2
+& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.ps1))) v1.7.3
 ```
 
 Node.js 22.23.2+와 Git이 필요합니다. 스크립트는 무엇이든 쓰기 전에 둘을 확인합니다.
@@ -292,11 +292,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           repository: MongLong0214/commitlore
-          ref: v1.7.2
+          ref: v1.7.3
           path: .commitlore-cli
           persist-credentials: false
 
-      - uses: MongLong0214/commitlore/action/preserve@v1.7.2
+      - uses: MongLong0214/commitlore/action/preserve@v1.7.3
         with:
           cli-path: .commitlore-cli/dist/cli.js
 ```
diff --git a/README.md b/README.md
index 0978d2ef..ab407608 100644
--- a/README.md
+++ b/README.md
@@ -48,18 +48,18 @@
 </p>
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 <details>
 <summary>Prefer to read the installer first?</summary>
 
 ```bash
-curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh
-sh install.sh v1.7.2
+curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh
+sh install.sh v1.7.3
 
 # Or skip the script: the checkout it makes is one you can make yourself.
-git clone --depth 1 --branch v1.7.2 https://github.com/MongLong0214/commitlore
+git clone --depth 1 --branch v1.7.3 https://github.com/MongLong0214/commitlore
 node commitlore/dist/commitlore.mjs --version
 ```
 
@@ -109,13 +109,13 @@ preserve, not for narrating every change.
 macOS and Linux:
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 Windows:
 
 ```powershell
-& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.ps1))) v1.7.2
+& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.ps1))) v1.7.3
 ```
 
 Requires Node.js 22.23.2+ and Git. The script checks both before it writes anything.
@@ -304,11 +304,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           repository: MongLong0214/commitlore
-          ref: v1.7.2
+          ref: v1.7.3
           path: .commitlore-cli
           persist-credentials: false
 
-      - uses: MongLong0214/commitlore/action/preserve@v1.7.2
+      - uses: MongLong0214/commitlore/action/preserve@v1.7.3
         with:
           cli-path: .commitlore-cli/dist/cli.js
 ```
diff --git a/README.zh-CN.md b/README.zh-CN.md
index c3a8f879..67c782de 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -47,18 +47,18 @@
 </p>
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 <details>
 <summary>想先阅读安装器吗？</summary>
 
 ```bash
-curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh
-sh install.sh v1.7.2
+curl -fsSLO https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh
+sh install.sh v1.7.3
 
 # 或者跳过脚本：它创建的检出，你自己也能创建。
-git clone --depth 1 --branch v1.7.2 https://github.com/MongLong0214/commitlore
+git clone --depth 1 --branch v1.7.3 https://github.com/MongLong0214/commitlore
 node commitlore/dist/commitlore.mjs --version
 ```
 
@@ -105,13 +105,13 @@ CommitLore 把那份判断留在代码旁边。
 macOS 和 Linux：
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 ```
 
 Windows：
 
 ```powershell
-& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.ps1))) v1.7.2
+& ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.ps1))) v1.7.3
 ```
 
 需要 Node.js 22.23.2+ 和 Git。脚本会在写入任何内容前检查两者。
@@ -286,11 +286,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           repository: MongLong0214/commitlore
-          ref: v1.7.2
+          ref: v1.7.3
           path: .commitlore-cli
           persist-credentials: false
 
-      - uses: MongLong0214/commitlore/action/preserve@v1.7.2
+      - uses: MongLong0214/commitlore/action/preserve@v1.7.3
         with:
           cli-path: .commitlore-cli/dist/cli.js
 ```
diff --git a/install.ps1 b/install.ps1
index a1379a21..853c5489 100644
--- a/install.ps1
+++ b/install.ps1
@@ -1,8 +1,8 @@
 <#
     Installs commitlore from source on Windows, for any agent that is not Claude Code.
 
-      irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.ps1 | iex
-      & ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.ps1))) v1.7.2
+      irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.ps1 | iex
+      & ([scriptblock]::Create((irm https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.ps1))) v1.7.3
 
     Claude Code users do not need this script. The repository is itself a plugin
     marketplace (ADR-0011), so two /plugin commands register the MCP server, the
diff --git a/install.sh b/install.sh
index 744e197c..2dd07937 100755
--- a/install.sh
+++ b/install.sh
@@ -1,8 +1,8 @@
 #!/bin/sh
 # Installs commitlore from source, for any agent that is not Claude Code.
 #
-#   curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh
-#   curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2
+#   curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh
+#   curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3
 #
 # **Claude Code users do not need this script.** The repository is itself a
 # plugin marketplace (ADR-0011), so two `/plugin` commands register the MCP
diff --git a/package-lock.json b/package-lock.json
index 8408af54..c2f139a0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "commitlore",
-  "version": "1.7.2",
+  "version": "1.7.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "commitlore",
-      "version": "1.7.2",
+      "version": "1.7.3",
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.30.1",
diff --git a/package.json b/package.json
index 21f1df20..f0f4aec3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "commitlore",
-  "version": "1.7.2",
+  "version": "1.7.3",
   "description": "Git-native, lifecycle-aware decision memory for coding agents",
   "license": "MIT",
   "private": true,
diff --git a/server.json b/server.json
index 4ae68313..6aee7817 100644
--- a/server.json
+++ b/server.json
@@ -8,7 +8,7 @@
     "source": "github"
   },
   "websiteUrl": "https://github.com/MongLong0214/commitlore#readme",
-  "version": "1.7.2",
+  "version": "1.7.3",
   "_meta": {
     "io.modelcontextprotocol.registry/publisher-provided": {
       "registryFit": "Distribution is a tagged git checkout plus a Claude Code plugin marketplace (ADR-0011 registry-free git distribution, ADR-0026 no compiled executables and no uploaded release asset), so no official package type applies and this record relies on websiteUrl plus publisher metadata.",
@@ -18,8 +18,8 @@
           "/plugin marketplace add MongLong0214/commitlore",
           "/plugin install commitlore@commitlore"
         ],
-        "installer": "curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.2/install.sh | sh -s v1.7.2",
-        "release": "https://github.com/MongLong0214/commitlore/releases/tag/v1.7.2"
+        "installer": "curl -fsSL https://raw.githubusercontent.com/MongLong0214/commitlore/v1.7.3/install.sh | sh -s v1.7.3",
+        "release": "https://github.com/MongLong0214/commitlore/releases/tag/v1.7.3"
       },
       "runtime": {
         "transport": "stdio",