fix(release): align cli and compound-engineering versions with linked-versions plugin

Add release-please linked-versions plugin so cli and compound-engineering
always bump together. Align compound-engineering version to 2.58.0 to
match cli. Previously they diverged at v2.54.0 when commits touched only
one package's path.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/.release-please-manifest.json

@@ -1,6 +1,6 @@
 {
   ".": "2.58.0",
-  "plugins/compound-engineering": "2.57.0",
+  "plugins/compound-engineering": "2.58.0",
   "plugins/coding-tutor": "1.2.1",
   ".claude-plugin": "1.0.2",
   ".cursor-plugin": "1.0.1"

.github/release-please-config.json

@@ -3,6 +3,13 @@
   "include-component-in-tag": true,
   "release-search-depth": 20,
   "commit-search-depth": 50,
+  "plugins": [
+    {
+      "type": "linked-versions",
+      "groupName": "compound-engineering",
+      "components": ["cli", "compound-engineering"]
+    }
+  ],
   "packages": {
     ".": {
       "release-type": "simple",

plugins/compound-engineering/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "compound-engineering",
-  "version": "2.57.0",
+  "version": "2.58.0",
   "description": "AI-powered development tools for code review, research, design, and workflow automation.",
   "author": {
     "name": "Kieran Klaassen",

plugins/compound-engineering/.cursor-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "compound-engineering",
   "displayName": "Compound Engineering",
-  "version": "2.57.0",
+  "version": "2.58.0",
   "description": "AI-powered development tools for code review, research, design, and workflow automation.",
   "author": {
     "name": "Kieran Klaassen",