Update CONTRACTS.md

CONTRACTS.md

@@ -4,13 +4,41 @@ AISA relies on explicit cross-layer contracts to ensure predictable, governable,
 These contracts define how constraints and signals propagate across layers.
 
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-
-| Contract | Purpose | Key Artifacts |
-|---------|---------|---------------|
-| **Policy** | Enforce governance and safety constraints | Tool permissions, approval rules, safety policies, escalation rules |
-| **Telemetry** | Enable auditability and traceability | Run IDs, traces, tool logs, policy markers, budget signals |
-| **Versioning** | Ensure reproducibility and controlled change | Models, prompts, tools, workflows, memory and evaluation artifacts |
-| **Budget** | Control cost, latency, and risk | Token limits, time limits, tool-call limits, cost ceilings |
+<div align="center">
+
+<table>
+  <thead>
+    <tr>
+      <th>Contract</th>
+      <th>Purpose</th>
+      <th>Key Artifacts</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><strong>Policy</strong></td>
+      <td>Enforce governance and safety constraints</td>
+      <td>Tool permissions, approval rules, safety policies, escalation rules</td>
+    </tr>
+    <tr>
+      <td><strong>Telemetry</strong></td>
+      <td>Enable auditability and traceability</td>
+      <td>Run IDs, traces, tool logs, policy markers, budget signals</td>
+    </tr>
+    <tr>
+      <td><strong>Versioning</strong></td>
+      <td>Ensure reproducibility and controlled change</td>
+      <td>Models, prompts, tools, workflows, memory and evaluation artifacts</td>
+    </tr>
+    <tr>
+      <td><strong>Budget</strong></td>
+      <td>Control cost, latency, and risk</td>
+      <td>Token limits, time limits, tool-call limits, cost ceilings</td>
+    </tr>
+  </tbody>
+</table>
+
+</div>
 
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