diff --git a/README.md b/README.md
index 826208a..9a37554 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ Only contracts that genuinely cross a repository boundary:
 | Schema | Version | Consumers |
 | --- | --- | --- |
 | `aep-record` | `aep/v0.3` | wasmagent-js, wasmagent-proxy, trace-pipeline, wasmagent-train-replay, open-agent-audit |
+| `canonical-event` | `canonical-event/v0.1` | open-agent-audit, wasmagent-js |
 | `constraint-ir` | `compliance/v1` | wasmagent-js, trace-pipeline |
 | `constraint-violation` | `compliance/v1` | wasmagent-js, trace-pipeline |
 | `repair-trace` | `compliance/v1` | wasmagent-js, trace-pipeline |
diff --git a/index.d.ts b/index.d.ts
index 465117e..d598c0e 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -31,6 +31,49 @@ export const schemas: Record<string, unknown>;
  */
 export function getSchema(id: string): unknown;
 
+// ---------------------------------------------------------------------------
+// Schema instance types (convenience views).
+//
+// The authoritative contract for every record shape is its JSON Schema
+// (see schemas/index.json). Load and validate against it at runtime via
+// getSchema(<id>). The interfaces below capture only the required top-level
+// fields so consumers can type their payloads ergonomically; the index
+// signature passes through every optional schema property unchanged.
+// ---------------------------------------------------------------------------
+
+/**
+ * Convenience structural view of an Agent Evidence Protocol (AEP) record —
+ * runtime action evidence and run provenance. Authoritative shape:
+ * getSchema('aep-record') → schemas/aep/aep-record.schema.json.
+ */
+export interface AEPRecord {
+  /** Schema version, one of `aep/v0.1` | `aep/v0.2` | `aep/v0.3`. */
+  schema_version: string;
+  /** Identifier of the run this record captures. */
+  run_id: string;
+  /** UTC epoch milliseconds when the record was created. */
+  created_at_ms: number;
+  [key: string]: unknown;
+}
+
+/**
+ * Convenience structural view of a normalized event — the foundational record
+ * heterogeneous agent evidence is normalized into before being mapped onto an
+ * AEPRecord. Authoritative shape:
+ * getSchema('canonical-event') → schemas/aep/canonical-event.schema.json.
+ */
+export interface CanonicalEvent {
+  /** Canonical-event schema version, currently `canonical-event/v0.1`. */
+  schema_version: string;
+  /** Globally-unique identifier for this event within its trace. */
+  event_id: string;
+  /** Kind of event: action | decision | observation | error | lifecycle. */
+  event_type: string;
+  /** UTC epoch milliseconds when the event occurred. */
+  timestamp_ms: number;
+  [key: string]: unknown;
+}
+
 // ---------------------------------------------------------------------------
 // Cross-repo schema drift detection.
 // ---------------------------------------------------------------------------
diff --git a/schemas/aep/canonical-event.schema.json b/schemas/aep/canonical-event.schema.json
new file mode 100644
index 0000000..49cc4bb
--- /dev/null
+++ b/schemas/aep/canonical-event.schema.json
@@ -0,0 +1,112 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://wasmagent.dev/schemas/aep/canonical-event.schema.json",
+  "title": "CanonicalEvent",
+  "description": "Foundational, normalized event record for the WasmAgent evidence stream. Heterogeneous agent evidence (e.g. an open-agent-audit run) is normalized into one or more CanonicalEvents, which an adapter then maps onto an aep-record. Field names deliberately mirror aep-record (trace_id, run_id, tool_name, state_changing, refs, signature) so the mapping is mechanical rather than lossy.",
+  "type": "object",
+  "required": ["schema_version", "event_id", "event_type", "timestamp_ms"],
+  "properties": {
+    "schema_version": {
+      "type": "string",
+      "enum": ["canonical-event/v0.1"],
+      "description": "Version of the canonical-event schema this record conforms to."
+    },
+    "event_id": {
+      "type": "string",
+      "description": "Globally-unique identifier for this event within its trace."
+    },
+    "event_type": {
+      "type": "string",
+      "enum": ["action", "decision", "observation", "error", "lifecycle"],
+      "description": "Kind of event. 'action' maps to an aep-record action; 'decision' to a capability_decision; 'observation'/'error'/'lifecycle' to verifier_results or provenance."
+    },
+    "timestamp_ms": {
+      "type": "number",
+      "description": "UTC epoch milliseconds when the event occurred."
+    },
+    "trace_id": {
+      "type": "string",
+      "description": "Correlation id linking related events; maps to aep-record.trace_id."
+    },
+    "run_id": {
+      "type": "string",
+      "description": "Identifier of the run this event belongs to; maps to aep-record.run_id."
+    },
+    "parent_event_id": {
+      "type": ["string", "null"],
+      "description": "Event id of the causally-preceding event, enabling causal-chain reconstruction; maps to aep-record.actions[].parent_action_id."
+    },
+    "actor": {
+      "type": "object",
+      "description": "The agent/tool/human/system that produced the event.",
+      "required": ["actor_id"],
+      "properties": {
+        "actor_id": { "type": "string", "description": "Stable identifier for the actor." },
+        "actor_type": {
+          "type": "string",
+          "enum": ["agent", "tool", "human", "system"],
+          "description": "Category of actor."
+        },
+        "agent_version": { "type": "string", "description": "Agent/runtime version, e.g. wasmagent-js@1.20.0; maps to aep-record.runtime_version / run_context.agent_version." }
+      },
+      "additionalProperties": true
+    },
+    "subject_id": {
+      "type": "string",
+      "description": "Optional principal the event was performed on behalf of; maps to aep-record.subject_id / user_id."
+    },
+    "tool_name": {
+      "type": "string",
+      "description": "For action events, the tool invoked; maps to aep-record.actions[].tool_name."
+    },
+    "state_changing": {
+      "type": "boolean",
+      "description": "Whether the event mutates external state; maps to aep-record.actions[].state_changing and side_effect_class."
+    },
+    "data": {
+      "type": "object",
+      "description": "Type-specific payload for the event. Free-form; consumers narrow it by event_type. May carry tool arguments/results, decision rationale, verifier scores, etc.",
+      "additionalProperties": true
+    },
+    "refs": {
+      "type": "array",
+      "description": "Input/output/evidence artifacts referenced by the event; maps to aep-record.input_refs / output_refs / evidence_refs.",
+      "items": {
+        "type": "object",
+        "required": ["uri"],
+        "properties": {
+          "uri": { "type": "string", "description": "Location of the referenced artifact." },
+          "digest": { "type": "string", "description": "Content digest of the referenced artifact." },
+          "relation": {
+            "type": "string",
+            "enum": ["input", "output", "evidence", "memory"],
+            "description": "How the artifact relates to the event."
+          }
+        },
+        "additionalProperties": true
+      }
+    },
+    "source": {
+      "type": "object",
+      "description": "Provenance of the event for adapter traceability.",
+      "properties": {
+        "system": { "type": "string", "description": "Originating system, e.g. open-agent-audit, wasmagent-js." },
+        "adapter": { "type": "string", "description": "Name/version of the adapter that produced this canonical event." },
+        "source_event_type": { "type": "string", "description": "The native event type this was normalized from." }
+      },
+      "additionalProperties": true
+    },
+    "signature": {
+      "type": "object",
+      "description": "Optional tamper-evident signature over the event content; maps to aep-record.signature.",
+      "required": ["alg", "key_id", "sig"],
+      "properties": {
+        "alg": { "type": "string", "description": "Signature algorithm, e.g. ed25519." },
+        "key_id": { "type": "string", "description": "Identifier of the signing key." },
+        "sig": { "type": "string", "description": "Base64-encoded signature bytes." }
+      },
+      "additionalProperties": true
+    }
+  },
+  "additionalProperties": true
+}
diff --git a/schemas/index.json b/schemas/index.json
index 2bc43b1..f02ffbf 100644
--- a/schemas/index.json
+++ b/schemas/index.json
@@ -41,6 +41,22 @@
       ],
       "summary": "Shared envelope base for all AEP evidence records \u2014 schema_version, trace_id, created_at_ms, and optional signature."
     },
+    {
+      "id": "canonical-event",
+      "title": "CanonicalEvent",
+      "path": "schemas/aep/canonical-event.schema.json",
+      "canonical_id": "https://wasmagent.dev/schemas/aep/canonical-event.schema.json",
+      "version": "canonical-event/v0.1",
+      "stability": "evolving",
+      "owners": [
+        "wasmagent-protocol"
+      ],
+      "consumers": [
+        "open-agent-audit",
+        "wasmagent-js"
+      ],
+      "summary": "Foundational normalized event record. Heterogeneous agent evidence is normalized into CanonicalEvents that an adapter maps onto an aep-record."
+    },
     {
       "id": "constraint-ir",
       "title": "ConstraintIR",
diff --git a/tests/fixtures/invalid/canonical-event/example.json b/tests/fixtures/invalid/canonical-event/example.json
new file mode 100644
index 0000000..011936a
--- /dev/null
+++ b/tests/fixtures/invalid/canonical-event/example.json
@@ -0,0 +1,5 @@
+{
+  "schema_version": "canonical-event/v9.9",
+  "event_type": "not-a-real-event-type",
+  "timestamp_ms": 1737600000000
+}
diff --git a/tests/fixtures/valid/canonical-event/example.json b/tests/fixtures/valid/canonical-event/example.json
new file mode 100644
index 0000000..356a783
--- /dev/null
+++ b/tests/fixtures/valid/canonical-event/example.json
@@ -0,0 +1,38 @@
+{
+  "schema_version": "canonical-event/v0.1",
+  "event_id": "evt-0001",
+  "event_type": "action",
+  "timestamp_ms": 1737600000100,
+  "trace_id": "trace-001",
+  "run_id": "run-abc123",
+  "parent_event_id": "evt-0000",
+  "actor": {
+    "actor_id": "agent-1",
+    "actor_type": "agent",
+    "agent_version": "wasmagent-js@1.20.0"
+  },
+  "subject_id": "user-42",
+  "tool_name": "write_file",
+  "state_changing": true,
+  "data": {
+    "path": "/tmp/out.txt",
+    "bytes_written": 128
+  },
+  "refs": [
+    {
+      "uri": "file:///tmp/out.txt",
+      "digest": "sha256:deadbeef",
+      "relation": "output"
+    }
+  ],
+  "source": {
+    "system": "open-agent-audit",
+    "adapter": "oaa-aep-adapter@0.1",
+    "source_event_type": "tool_call"
+  },
+  "signature": {
+    "alg": "ed25519",
+    "key_id": "k1",
+    "sig": "base64sig=="
+  }
+}
diff --git a/tests/fixtures/valid/canonical-event/minimal.json b/tests/fixtures/valid/canonical-event/minimal.json
new file mode 100644
index 0000000..510ef18
--- /dev/null
+++ b/tests/fixtures/valid/canonical-event/minimal.json
@@ -0,0 +1,6 @@
+{
+  "schema_version": "canonical-event/v0.1",
+  "event_id": "evt-minimal",
+  "event_type": "observation",
+  "timestamp_ms": 1737600000000
+}