refactor: restructure to plugin/ + services/ layout and add per-turn bootstrap injection

- Migrate src/ → plugin/ (plugin/core/, plugin/web/, plugin/commands/)
  and src/mcp/ → services/ per OpenClaw plugin dev spec
- Add Gemini CLI backend (plugin/core/gemini/sdk-adapter.ts) with GEMINI.md
  system-prompt injection
- Inject bootstrap as stateless system prompt on every turn instead of
  first turn only: Claude via --system-prompt, Gemini via workspace/GEMINI.md;
  eliminates isFirstTurn branch, keeps skills in sync with OpenClaw snapshots
- Fix session-map-store defensive parsing (sessions ?? []) to handle bare {}
  reset files without crashing on .find()
- Add docs/TEST_FLOW.md with E2E test scenarios and expected outcomes
- Add docs/claude/BRIDGE_MODEL_FINDINGS.md with contractor-probe results

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

test/contractor-probe/index.ts

@@ -0,0 +1,54 @@
+import { spawn } from "node:child_process";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
+
+const _G = globalThis as Record<string, unknown>;
+const LIFECYCLE_KEY = "_contractorProbeLifecycleRegistered";
+const SIDECAR_KEY = "_contractorProbeSidecarProcess";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+function startSidecar(logger: OpenClawPluginApi["logger"]): void {
+  const serverPath = path.join(__dirname, "server.mjs");
+  const child = spawn(process.execPath, [serverPath], {
+    env: { ...process.env, PROBE_PORT: "8799" },
+    stdio: ["ignore", "pipe", "pipe"],
+    detached: false,
+  });
+
+  child.stdout?.on("data", (d: Buffer) =>
+    logger.info(`[contractor-probe-sidecar] ${d.toString().trim()}`)
+  );
+  child.stderr?.on("data", (d: Buffer) =>
+    logger.warn(`[contractor-probe-sidecar] ${d.toString().trim()}`)
+  );
+  child.on("exit", (code: number | null) =>
+    logger.info(`[contractor-probe-sidecar] exited code=${code}`)
+  );
+
+  _G[SIDECAR_KEY] = child;
+  logger.info("[contractor-probe] sidecar started");
+}
+
+function stopSidecar(logger: OpenClawPluginApi["logger"]): void {
+  const child = _G[SIDECAR_KEY] as import("node:child_process").ChildProcess | undefined;
+  if (child && !child.killed) {
+    child.kill("SIGTERM");
+    logger.info("[contractor-probe] sidecar stopped");
+  }
+}
+
+export default {
+  id: "contractor-probe",
+  name: "Contractor Probe",
+  register(api: OpenClawPluginApi) {
+    if (!_G[LIFECYCLE_KEY]) {
+      _G[LIFECYCLE_KEY] = true;
+      startSidecar(api.logger);
+      api.on("gateway_stop", () => stopSidecar(api.logger));
+    }
+
+    api.logger.info("[contractor-probe] plugin registered");
+  },
+};