feat(skills): formalize agent coordination via beadboard-driver

We moved from ad-hoc task claims to a strictly defined 'Skill' system.

Triumphs:
- Implemented the 'beadboard-driver' skill, which encodes our project-specific coordination protocols (claim, reservation, handoff).
- This ensures that any AI operative (or human supervisor) can participate in the project lifecycle using a unified CLI-driven state machine.
- Decoupled high-level mission logic from low-level file mutations, allowing for easier agent skill composition in the future.

Raw Honest Moment:
Initially, we were just 'winging it' with manual status updates. Formalizing this into a skill was a necessary step to ensure our collaboration is repeatable and resilient to agent context swaps.

skills/beadboard-driver/scripts/session-preflight.mjs

@@ -0,0 +1,83 @@
+#!/usr/bin/env node
+
+import { findCommandInPath, resolveBbPath } from './lib/driver-lib.mjs';
+
+async function main() {
+  try {
+    const bdPath = await findCommandInPath('bd');
+    if (!bdPath) {
+      process.stdout.write(
+        `${JSON.stringify(
+          {
+            ok: false,
+            error_code: 'BD_NOT_FOUND',
+            reason: 'Could not find bd in PATH.',
+            remediation: 'Install beads CLI or add bd executable to PATH.',
+            tools: {
+              bd: { available: false, path: null },
+            },
+            bb: null,
+          },
+          null,
+          2,
+        )}\n`,
+      );
+      return;
+    }
+
+    const bb = await resolveBbPath();
+    if (!bb.ok) {
+      process.stdout.write(
+        `${JSON.stringify(
+          {
+            ok: false,
+            error_code: 'BB_NOT_FOUND',
+            reason: bb.reason,
+            remediation: bb.remediation,
+            tools: {
+              bd: { available: true, path: bdPath },
+            },
+            bb,
+          },
+          null,
+          2,
+        )}\n`,
+      );
+      return;
+    }
+
+    process.stdout.write(
+      `${JSON.stringify(
+        {
+          ok: true,
+          timestamp: new Date().toISOString(),
+          tools: {
+            bd: { available: true, path: bdPath },
+          },
+          bb,
+        },
+        null,
+        2,
+      )}\n`,
+    );
+  } catch (error) {
+    process.stdout.write(
+      `${JSON.stringify(
+        {
+          ok: false,
+          error_code: 'PREFLIGHT_INTERNAL_ERROR',
+          reason: error instanceof Error ? error.message : String(error),
+          remediation: 'Inspect session-preflight.js and retry.',
+          tools: {
+            bd: { available: false, path: null },
+          },
+          bb: null,
+        },
+        null,
+        2,
+      )}\n`,
+    );
+  }
+}
+
+void main();