fix(plugins): hooks.json must be {"hooks": {}} not []; add plugin-validate CI

The empty-array hooks.json in private-equity, financial-analysis,
equity-research and wealth-management caused those plugins to fail to
load ("Hook load failed: expected object, received array"). Replace [] with
the minimal valid {"hooks": {}} object in all four.

Add a plugin-validate workflow that runs the official `claude plugin
validate` over the marketplace manifest and every plugin on each PR and
push, so a malformed manifest fails CI instead of reaching users. The
CLI is installed from the official binary channel and cached, keyed on a
pinned version, so a warm cache skips the download entirely.

.github/workflows/plugin-validate.yml

@@ -0,0 +1,58 @@
+name: plugin-validate
+
+# Runs the official Claude Code plugin linter over every plugin and the
+# marketplace manifest. Catches malformed manifests (e.g. hooks.json as a
+# bare [] instead of {"hooks": {}}) before they reach users.
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+permissions:
+  contents: read
+
+env:
+  # Pinned for reproducible builds + a stable cache key. Bump by setting this
+  # to a newer version from https://downloads.claude.ai/claude-code-releases/stable
+  CLAUDE_VERSION: 2.1.133
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Cache Claude Code CLI
+        id: cli-cache
+        uses: actions/cache@v4
+        with:
+          path: ~/.local/bin/claude
+          key: claude-cli-${{ runner.os }}-${{ env.CLAUDE_VERSION }}
+
+      - name: Install Claude Code CLI
+        if: steps.cli-cache.outputs.cache-hit != 'true'
+        run: curl -fsSL https://claude.ai/install.sh | bash -s "$CLAUDE_VERSION"
+
+      - name: Validate marketplace + every plugin
+        run: |
+          set -euo pipefail
+          export PATH="$HOME/.local/bin:$PATH"
+          claude --version
+          fail=0
+
+          echo "::group::marketplace"
+          claude plugin validate .claude-plugin/marketplace.json || fail=1
+          echo "::endgroup::"
+
+          while IFS= read -r manifest; do
+            plugin_dir="$(dirname "$(dirname "$manifest")")"
+            echo "::group::$plugin_dir"
+            claude plugin validate "$plugin_dir" || fail=1
+            echo "::endgroup::"
+          done < <(find plugins -path '*/.claude-plugin/plugin.json' | sort)
+
+          if [ "$fail" -ne 0 ]; then
+            echo "::error::plugin validation failed — see grouped logs above"
+            exit 1
+          fi

plugins/vertical-plugins/equity-research/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "equity-research",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Equity research tools: earnings analysis, initiating coverage reports, and research workflows",
   "author": {
     "name": "Anthropic FSI"

plugins/vertical-plugins/equity-research/hooks/hooks.json

@@ -1 +1,3 @@
-[]
+{
+  "hooks": {}
+}

plugins/vertical-plugins/financial-analysis/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "financial-analysis",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Core financial modeling and analysis tools: DCF, comps, LBO, 3-statement models, competitive analysis, and deck QC",
   "author": {
     "name": "Anthropic FSI"

plugins/vertical-plugins/financial-analysis/hooks/hooks.json

@@ -1 +1,3 @@
-[]
+{
+  "hooks": {}
+}

plugins/vertical-plugins/private-equity/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "private-equity",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Private equity deal sourcing and workflow tools: company discovery, CRM integration, and founder outreach",
   "author": {
     "name": "Anthropic FSI"

plugins/vertical-plugins/private-equity/hooks/hooks.json

@@ -1 +1,3 @@
-[]
+{
+  "hooks": {}
+}

plugins/vertical-plugins/wealth-management/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "wealth-management",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "Wealth management and financial advisory tools: client reviews, financial planning, portfolio analysis, and client reporting",
   "author": {
     "name": "Anthropic FSI"

plugins/vertical-plugins/wealth-management/hooks/hooks.json

@@ -1 +1,3 @@
-[]
+{
+  "hooks": {}
+}