v1.4.1: Fix plugin install command syntax

Hotfix for an incorrect install command in the v1.4.0 docs.

The Problem

The README and install guide in v1.4.0 (and all prior releases) showed this install command:

claude plugin install github:AgriciDaniel/claude-obsidian

This form does not exist in Claude Code. Users trying it see:

Failed to install plugin "github:AgriciDaniel/claude-obsidian": Plugin "github:AgriciDaniel/claude-obsidian" not found in any configured marketplace

The Fix

Per the official plugin-marketplaces docs, plugin installation is a two-step process. First you add the marketplace catalog, then install the plugin from it.

# 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

Verify the install:

claude plugin list

In any Claude Code session, type /wiki to start.

Files Changed

• README.md: Option 2 install section rewritten with the two-step flow
• docs/install-guide.md: Same correction
• .claude-plugin/plugin.json: 1.4.0 to 1.4.1
• .claude-plugin/marketplace.json: 1.4.0 to 1.4.1

Upgrade

If you are on v1.4.0 or earlier and could not install:

claude plugin marketplace add AgriciDaniel/claude-obsidian
claude plugin install claude-obsidian@claude-obsidian-marketplace

If you already have the plugin installed and want to update:

claude plugin marketplace update claude-obsidian-marketplace