feat(FN-3717): add OpenClaw MCP bridge (+5 more)

Commits merged:
- docs(FN-3717): update openclaw runtime and settings docs
- test(FN-3717): fix openclaw engine test typing
- test(FN-3717): strengthen openclaw bridge coverage
- feat(FN-3717): complete Step 2 — wire engine and bundle delivery
- fix(FN-3717): address openclaw bridge review feedback
- feat(FN-3717): complete Step 1 — add OpenClaw MCP bridge

Files changed:
.changeset/fn-3717-openclaw-tool-bridge.md         |  5 ++
 docs/settings-reference.md                         | 28 +++++---
 packages/cli/src/__tests__/bundle-output.test.ts   |  9 +++
 packages/cli/tsup.config.ts                        |  7 ++
 .../src/__tests__/openclaw-runtime-e2e.test.ts     | 28 ++++++++
 .../__tests__/openclaw-runtime-integration.test.ts | 10 +++
 plugins/fusion-plugin-openclaw-runtime/README.md   | 13 ++++
 .../src/__tests__/cli-spawn.test.ts                | 82 +++++++++++++++++++---
 .../src/__tests__/mcp-config.test.ts               | 45 ++++++++++++
 .../src/__tests__/runtime-adapter.test.ts          | 46 ++++++++++++
 .../fusion-plugin-openclaw-runtime/src/index.ts    |  5 ++
 .../src/mcp-config.ts                              | 60 ++++++++++++++++
 .../src/mcp-schema-server.cjs                      | 59 ++++++++++++++++
 .../src/pi-module.ts                               | 52 ++++++++++++--
 .../src/runtime-adapter.ts                         | 26 +++++++
 .../fusion-plugin-openclaw-runtime/src/types.ts    |  4 ++
 16 files changed, 457 insertions(+), 22 deletions(-)

Fusion-Task-Id: FN-3717

plugins/fusion-plugin-openclaw-runtime/src/mcp-schema-server.cjs

@@ -0,0 +1,59 @@
+"use strict";
+
+const fs = require("fs");
+const readline = require("readline");
+
+const schemaPath = process.argv[2];
+if (!schemaPath) process.exit(1);
+
+let tools = [];
+try {
+  tools = JSON.parse(fs.readFileSync(schemaPath, "utf-8"));
+} catch {
+  process.exit(1);
+}
+
+const rl = readline.createInterface({ input: process.stdin });
+rl.on("line", (line) => {
+  let msg;
+  try {
+    msg = JSON.parse(line);
+  } catch {
+    return;
+  }
+
+  if (msg.method === "initialize") {
+    process.stdout.write(
+      JSON.stringify({
+        jsonrpc: "2.0",
+        id: msg.id,
+        result: {
+          protocolVersion: "2024-11-05",
+          capabilities: { tools: {} },
+          serverInfo: { name: "fusion-custom-tools", version: "1.0.0" },
+        },
+      }) + "\n",
+    );
+    return;
+  }
+
+  if (msg.method === "tools/list") {
+    process.stdout.write(
+      JSON.stringify({ jsonrpc: "2.0", id: msg.id, result: { tools } }) + "\n",
+    );
+    return;
+  }
+
+  if (msg.method === "tools/call") {
+    process.stdout.write(
+      JSON.stringify({
+        jsonrpc: "2.0",
+        id: msg.id,
+        result: {
+          content: [{ type: "text", text: "Tool execution is handled by Fusion runtime." }],
+          isError: true,
+        },
+      }) + "\n",
+    );
+  }
+});