diff --git a/agent-passbook-prototype/README.md b/agent-passbook-prototype/README.md
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+# Agent Passbook Prototype
+
+Prototype repository for tracking agent-issued passbooks within the NANDA organization. This project defines a JSON schema for passbook records, provides a sample passbook, and includes a small resolver utility to inspect passbook files.
+
+## Layout
+- `schemas/passbook.json`: JSON Schema describing a passbook document.
+- `examples/example-passbook-agentA.json`: Example passbook document adhering to the schema.
+- `service/passbook-resolver.py`: Utility for loading and summarizing passbook files.
+
+## Usage
+```bash
+python service/passbook-resolver.py examples/example-passbook-agentA.json
+```
+The resolver reports validation status and prints a concise summary of the passbook contents.
diff --git a/agent-passbook-prototype/examples/example-passbook-agentA.json b/agent-passbook-prototype/examples/example-passbook-agentA.json
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+++ b/agent-passbook-prototype/examples/example-passbook-agentA.json
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+{
+  "id": "passbook-agentA-0001",
+  "agent": {
+    "name": "Agent A",
+    "unit": "Reconnaissance",
+    "contact": "agent.a@nanda.example"
+  },
+  "issued_at": "2024-06-01T12:00:00Z",
+  "entries": [
+    {
+      "timestamp": "2024-06-02T09:15:00Z",
+      "event": "Passbook issued",
+      "authority": "HQ Registrar",
+      "notes": "Initial issuance"
+    },
+    {
+      "timestamp": "2024-06-05T14:32:00Z",
+      "event": "Clearance verified",
+      "authority": "Operations Control",
+      "notes": "Validated for field deployment"
+    }
+  ],
+  "checksum": "c0ffee89"
+}
diff --git a/agent-passbook-prototype/schemas/passbook.json b/agent-passbook-prototype/schemas/passbook.json
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+++ b/agent-passbook-prototype/schemas/passbook.json
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+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://nanda.org/agent-passbook.schema.json",
+  "title": "Agent Passbook",
+  "type": "object",
+  "required": ["id", "agent", "issued_at", "entries"],
+  "additionalProperties": false,
+  "properties": {
+    "id": {
+      "type": "string",
+      "description": "Unique identifier for this passbook"
+    },
+    "agent": {
+      "type": "object",
+      "required": ["name", "unit"],
+      "additionalProperties": false,
+      "properties": {
+        "name": { "type": "string" },
+        "unit": { "type": "string" },
+        "contact": {
+          "type": "string",
+          "description": "Preferred contact channel for the issuing agent"
+        }
+      }
+    },
+    "issued_at": {
+      "type": "string",
+      "format": "date-time",
+      "description": "ISO timestamp when the passbook was issued"
+    },
+    "entries": {
+      "type": "array",
+      "minItems": 1,
+      "items": {
+        "type": "object",
+        "required": ["timestamp", "event", "authority"],
+        "additionalProperties": false,
+        "properties": {
+          "timestamp": {
+            "type": "string",
+            "format": "date-time",
+            "description": "ISO timestamp for the event"
+          },
+          "event": {
+            "type": "string",
+            "description": "Short description of the event"
+          },
+          "authority": {
+            "type": "string",
+            "description": "Person or system authorizing the entry"
+          },
+          "notes": {
+            "type": "string",
+            "description": "Optional supporting detail"
+          }
+        }
+      }
+    },
+    "checksum": {
+      "type": "string",
+      "description": "Optional checksum for integrity verification"
+    }
+  }
+}
diff --git a/agent-passbook-prototype/service/passbook-resolver.py b/agent-passbook-prototype/service/passbook-resolver.py
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+++ b/agent-passbook-prototype/service/passbook-resolver.py
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+#!/usr/bin/env python3
+"""Simple resolver to load and validate agent passbook files."""
+
+import argparse
+import json
+from datetime import datetime
+from pathlib import Path
+from typing import Any, Dict, List
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(description="Load and validate a passbook file.")
+    parser.add_argument(
+        "passbook",
+        type=Path,
+        help="Path to the passbook JSON file",
+    )
+    parser.add_argument(
+        "--schema",
+        type=Path,
+        default=Path(__file__).resolve().parent.parent / "schemas" / "passbook.json",
+        help="Path to the passbook JSON schema (for reference)",
+    )
+    return parser.parse_args()
+
+
+def load_json(file_path: Path) -> Dict[str, Any]:
+    with file_path.open("r", encoding="utf-8") as handle:
+        return json.load(handle)
+
+
+def validate_datetime(value: str) -> bool:
+    try:
+        datetime.fromisoformat(value.replace("Z", "+00:00"))
+    except ValueError:
+        return False
+    return True
+
+
+def validate_passbook(document: Dict[str, Any]) -> List[str]:
+    errors: List[str] = []
+
+    for field in ("id", "agent", "issued_at", "entries"):
+        if field not in document:
+            errors.append(f"Missing required field: {field}")
+
+    if "agent" in document:
+        agent = document["agent"]
+        if not isinstance(agent, dict):
+            errors.append("agent must be an object")
+        else:
+            for field in ("name", "unit"):
+                if field not in agent:
+                    errors.append(f"agent.{field} is required")
+
+    if "issued_at" in document and not validate_datetime(str(document["issued_at"])):
+        errors.append("issued_at must be an ISO 8601 timestamp")
+
+    entries = document.get("entries")
+    if not isinstance(entries, list) or len(entries) == 0:
+        errors.append("entries must be a non-empty array")
+    else:
+        for index, entry in enumerate(entries):
+            if not isinstance(entry, dict):
+                errors.append(f"entries[{index}] must be an object")
+                continue
+            for field in ("timestamp", "event", "authority"):
+                if field not in entry:
+                    errors.append(f"entries[{index}].{field} is required")
+            timestamp = entry.get("timestamp")
+            if timestamp is not None and not validate_datetime(str(timestamp)):
+                errors.append(f"entries[{index}].timestamp must be an ISO 8601 timestamp")
+
+    return errors
+
+
+def summarize_passbook(document: Dict[str, Any]) -> str:
+    agent = document.get("agent", {})
+    entries = document.get("entries", [])
+    issued_at = document.get("issued_at", "unknown time")
+    lines = [
+        f"Passbook: {document.get('id', 'unknown id')}",
+        f"Agent: {agent.get('name', 'unknown name')} (unit: {agent.get('unit', 'unknown')})",
+        f"Issued at: {issued_at}",
+        "Entries:",
+    ]
+    for entry in entries:
+        lines.append(
+            f" - {entry.get('timestamp', 'unknown time')}: {entry.get('event', 'unknown event')}"
+            f" (authority: {entry.get('authority', 'unknown')})"
+        )
+    return "\n".join(lines)
+
+
+def main() -> None:
+    args = parse_args()
+    document = load_json(args.passbook)
+    errors = validate_passbook(document)
+
+    print(f"Loaded passbook from {args.passbook}")
+    print(f"Schema reference: {args.schema}")
+
+    if errors:
+        print("Validation: FAILED")
+        for issue in errors:
+            print(f" - {issue}")
+    else:
+        print("Validation: PASSED")
+        print(summarize_passbook(document))
+
+
+if __name__ == "__main__":
+    main()