Windsurf + Aider targets, MCP server, and demo placement (#33)

Broadens both reach (more tools) and content types (an MCP server), continuing
the multi-platform story.

Windsurf + Aider:
- build-exports.mjs gains two platforms: exports/windsurf/*.md (workspace rules,
  trigger: model_decision) and exports/aider/*.md (conventions for `aider --read`).
  Now 5 platforms (ChatGPT, Gemini, Cursor, Windsurf, Aider).
- install.sh + bin/cli.mjs install both (windsurf -> .windsurf/rules, aider ->
  .aider/skills with a --read hint); generated README index is excluded from copies.
- One-line windsurf-install.sh / aider-install.sh wrappers for parity.

MCP server (new content type):
- mcp/server.mjs — zero-dependency stdio MCP server exposing list_skills,
  search_skills, get_skill. Published as a second bin (pm-claude-skills-mcp).
  Logs to stderr; reads bundled skills/ at startup. mcp/README.md documents
  client config.

Also: README hero "See it in action" demo placement (ready to swap in a GIF;
recording guide in web/docs-assets/README.md), Works-With table + exports +
install docs updated, CHANGELOG Unreleased. package.json files/bin updated.


Claude-Session: https://claude.ai/code/session_016JWn5jRD5tcEFKrubjQ6Px

Co-authored-by: Claude <noreply@anthropic.com>

mcp/README.md

@@ -0,0 +1,45 @@
+# MCP Server
+
+A zero-dependency [Model Context Protocol](https://modelcontextprotocol.io) server that exposes this skill library to any MCP client (Claude Desktop, Cline, etc.). Instead of installing 172 files, your assistant can **search and pull skills on demand**.
+
+## Tools
+
+| Tool | What it does |
+|---|---|
+| `list_skills` | List every skill (name, tier, one-line description). Optional `tier` filter. |
+| `search_skills` | Keyword search across name, description, and body — returns the best matches. |
+| `get_skill` | Return the full instructions for one skill by name, ready to apply. |
+
+## Configure it
+
+**Claude Desktop** — add to `claude_desktop_config.json`:
+
+```json
+{
+  "mcpServers": {
+    "pm-claude-skills": {
+      "command": "npx",
+      "args": ["-y", "pm-claude-skills-mcp"]
+    }
+  }
+}
+```
+
+**From a local clone** (no npm install):
+
+```json
+{
+  "mcpServers": {
+    "pm-claude-skills": {
+      "command": "node",
+      "args": ["/absolute/path/to/pm-claude-skills/mcp/server.mjs"]
+    }
+  }
+}
+```
+
+Restart the client. Then ask it to *"search the skills for customer churn"* or *"get the rice-prioritisation skill and apply it to my backlog"* — it calls the tools automatically.
+
+## How it works
+
+Pure Node standard library, MCP stdio transport (newline-delimited JSON-RPC 2.0). It reads the bundled `skills/` at startup and serves them in-memory; all logging goes to stderr so it never corrupts the protocol stream. No network, no data leaves your machine.