Initial commit: WilloW-PMTools marketplace with willow-pmtools plugin

Marketplace with one plugin (willow-pmtools) that wires the projecttodos
MCP server (mcp.willowbrook.work) into Cowork and ships a /todos morning
briefing slash command.

README.md

@@ -0,0 +1,35 @@
+# Willowbrook PM Tools — Cowork Plugin Marketplace
+
+Private plugin marketplace for Willowbrook team members. Sync this repo into Cowork to give everyone access to internal PM tools.
+
+## Plugins in this marketplace
+
+| Plugin | Purpose |
+|---|---|
+| [willow-pmtools](./plugins/willow-pmtools/) | Todo + list management wired to the company's 4D backend, plus a `/todos` morning briefing command. |
+
+More plugins will be added here over time (Fieldwire, knowledge base, etc.).
+
+## How Cowork admins install this
+
+1. Claude Desktop → Organization settings → Plugins → Add plugin → GitHub → `<owner>/<repo>`
+2. The Claude GitHub App must be installed on this repo (private repo, github.com only — not GHE).
+3. Pick install preference per plugin: *Installed by default*, *Required*, *Available for install*, or *Not available*.
+4. Updates auto-sync on every merged PR (up to ~30 min); team members pick up changes on the next session.
+
+## Repo layout
+
+```
+.claude-plugin/
+  marketplace.json          ← catalog (REQUIRED at this exact path)
+plugins/
+  willow-pmtools/
+    .claude-plugin/
+      plugin.json           ← plugin manifest
+    .mcp.json               ← MCP server config
+    commands/
+      todos.md              ← /todos slash command
+    README.md
+```
+
+The `marketplace.json` location is **not** optional — Cowork rejects manifests anywhere else.