fix: correct plugin install command syntax in docs (v1.4.1)

The Claude Code plugin installation is a two-step process per the official
docs at code.claude.com/docs/en/plugin-marketplaces. There is no
'claude plugin install github:owner/repo' form. Users must first add the
marketplace catalog, then install the plugin from it by name.

Fixes:

* README.md: Option 2 install section now shows the two-step flow:
    claude plugin marketplace add AgriciDaniel/claude-obsidian
    claude plugin install claude-obsidian@claude-obsidian-marketplace

* docs/install-guide.md: Same correction, same syntax.

* plugin.json: 1.4.0 to 1.4.1
* marketplace.json: 1.4.0 to 1.4.1 (both metadata.version and
  plugins[0].version)

This fixes the reported "Plugin not found in any configured marketplace"
error users see when they try the old single-command form.

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

.claude-plugin/marketplace.json

@@ -6,7 +6,7 @@
   },
   "metadata": {
     "description": "claude-obsidian: Claude + Obsidian knowledge companion by AgriciDaniel",
-    "version": "1.4.0"
+    "version": "1.4.1"
   },
   "plugins": [
     {
@@ -17,7 +17,7 @@
         "ref": "main"
       },
       "description": "Claude + Obsidian knowledge companion. Sets up a persistent, compounding wiki vault. Covers memory management, session notetaking, knowledge organization, and agent context across projects.",
-      "version": "1.4.0",
+      "version": "1.4.1",
       "author": {
         "name": "AgriciDaniel",
         "url": "https://github.com/AgriciDaniel"

.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-obsidian",
-  "version": "1.4.0",
+  "version": "1.4.1",
   "description": "Claude + Obsidian knowledge companion. Sets up a persistent, compounding wiki vault. Covers memory management, session notetaking, knowledge organization, and agent context across projects. Based on Andrej Karpathy's LLM Wiki pattern.",
   "author": {
     "name": "AgriciDaniel",

README.md

@@ -52,12 +52,23 @@ Open Claude Code in the same folder. Type `/wiki`.
 
 ### Option 2: Install as Claude Code plugin
 
+Plugin installation is a two-step process in Claude Code. First add the marketplace catalog, then install the plugin from it.
+
 ```bash
-claude plugin install github:AgriciDaniel/claude-obsidian
+# Step 1: add the marketplace
+claude plugin marketplace add AgriciDaniel/claude-obsidian
+
+# Step 2: install the plugin
+claude plugin install claude-obsidian@claude-obsidian-marketplace
 ```
 
 In any Claude Code session: `/wiki`. Claude walks you through vault setup.
 
+To check it worked:
+```bash
+claude plugin list
+```
+
 ---
 
 ### Option 3: Add to an existing vault

docs/install-guide.md

@@ -39,13 +39,24 @@ Then in Obsidian: **Manage Vaults → Open folder as vault → select `claude-ob
 
 Open Claude Code in the same folder and type `/wiki`.
 
-### Option 2 — Install as Claude Code plugin
+### Option 2: Install as Claude Code plugin
+
+Plugin installation in Claude Code is a two-step process. First add the marketplace catalog, then install the plugin from it.
 
 ```bash
-claude plugin install github:AgriciDaniel/claude-obsidian
+# Step 1: add the marketplace
+claude plugin marketplace add AgriciDaniel/claude-obsidian
+
+# Step 2: install the plugin
+claude plugin install claude-obsidian@claude-obsidian-marketplace
 ```
 
-In any Claude Code session: type `/wiki` — Claude walks you through vault setup.
+Verify the install:
+```bash
+claude plugin list
+```
+
+In any Claude Code session: type `/wiki` and Claude walks you through vault setup.
 
 ### Option 3 — Add to an existing vault