Add plugin-maintenance plugin with bump-version command

.claude-plugin/marketplace.json

@@ -18,6 +18,17 @@
       },
       "repository": "https://github.com/8thlight/lightfactory",
       "category": "agentic-engineering"
+    },
+    {
+      "name": "plugin-maintenance",
+      "source": "./plugins/plugin-maintenance",
+      "description": "Maintenance utilities for Claude Code plugins, including version bumping for modified plugins.",
+      "version": "1.0.0",
+      "author": {
+        "name": "8th Light"
+      },
+      "repository": "https://github.com/8thlight/lightfactory",
+      "category": "tooling"
     }
   ]
 }

plugins/plugin-maintenance/.claude-plugin/plugin.json

@@ -0,0 +1,8 @@
+{
+  "name": "plugin-maintenance",
+  "version": "1.0.0",
+  "description": "Maintenance utilities for Claude Code plugins, including version bumping for modified plugins.",
+  "commands": [
+    "./commands/bump-version.md"
+  ]
+}

plugins/plugin-maintenance/commands/bump-version.md

@@ -0,0 +1,49 @@
+---
+description: Find all plugin.json files under plugins/ that are modified in git, increment their patch version, and print a summary for review before committing.
+allowed-tools: Bash(git diff:*) Read Write
+---
+
+## Your Task
+
+### 1. Find modified plugin.json files
+
+Run:
+
+```bash
+git diff --name-only HEAD
+```
+
+Collect all paths from the output that match the pattern `plugins/*/.claude-plugin/plugin.json`.
+
+If no plugin.json files are modified (staged or unstaged), print:
+
+```
+No modified plugin.json files found. Nothing to bump.
+```
+
+Then stop.
+
+### 2. For each modified plugin.json
+
+Read the file and extract the current `"version"` field (semver string, e.g. `"1.4.1"`).
+
+Increment the patch component:
+- `1.4.1` → `1.4.2`
+- `2.0.0` → `2.0.1`
+
+Write the updated JSON back to the file with the new version value. Preserve all other fields and formatting.
+
+### 3. Print a summary
+
+After all files are updated, output a table:
+
+```
+Bumped plugin versions:
+
+  plugins/example/.claude-plugin/plugin.json   1.4.1 → 1.4.2
+  plugins/other/.claude-plugin/plugin.json     2.0.0 → 2.0.1
+
+Review the changes above before committing.
+```
+
+Do not commit. Do not stage. The user will review and commit.