diff --git a/.gitignore b/.gitignore
index 69fc375..4c6799c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,7 @@ infra/node_modules/
 infra/dist/
 infra/cdk.out/
 infra/coverage
+infra/constants/event-statuses.ts
 
 
 # DeepEval
diff --git a/infra/constants/event-statuses.ts b/infra/constants/event-statuses.ts
deleted file mode 100644
index c00ebc9..0000000
--- a/infra/constants/event-statuses.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-/**
- * Event status constants used by Step Functions workflow
- *
- * The Step Function polls DynamoDB for these statuses to determine when
- * the agent background task has completed or failed.
- *
- * Note: Other event statuses (SESSION_INITIATED, AGENT_INVOCATION_STARTED, etc.)
- * are defined in Python at src/shared/event_statuses.py and used by Lambda functions.
- */
-
-export const EventStatus = {
-  /**
-   * Agent background task completed successfully (Step Function polls for this)
-   */
-  AGENT_BACKGROUND_TASK_COMPLETED: 'AGENT_BACKGROUND_TASK_COMPLETED',
-
-  /**
-   * Agent background task failed (Step Function polls for this)
-   */
-  AGENT_BACKGROUND_TASK_FAILED: 'AGENT_BACKGROUND_TASK_FAILED',
-} as const;
-
-export type EventStatusType = (typeof EventStatus)[keyof typeof EventStatus];
diff --git a/infra/package.json b/infra/package.json
index 1ebf91c..8d5e44c 100644
--- a/infra/package.json
+++ b/infra/package.json
@@ -2,10 +2,11 @@
   "name": "infra",
   "private": true,
   "scripts": {
-    "prebuild": "npm run package-agent && npm run prepare-lambda",
+    "prebuild": "npm run generate-event-statuses && npm run package-agent && npm run prepare-lambda",
     "build": "tsc -p tsconfig.json",
     "watch": "tsc -w",
     "clean": "rm -rf cdk.out dist",
+    "generate-event-statuses": "python3 ../scripts/generate-event-statuses.py constants/event-statuses.ts",
     "prepare-lambda": "rm -rf dist/build-lambda && mkdir -p dist/build-lambda/src && cp ../infra/lambda/*.py dist/build-lambda/ && cp ../src/__init__.py dist/build-lambda/src/ && cp -r ../src/shared dist/build-lambda/src/",
     "package-agent": "rm -rf dist/build-agent && bash ../scripts/build-deployment-package.sh",
     "synth": "npm run build && cdk synth",
diff --git a/scripts/generate-event-statuses.py b/scripts/generate-event-statuses.py
new file mode 100644
index 0000000..cbc8a2a
--- /dev/null
+++ b/scripts/generate-event-statuses.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+"""Generate infra/constants/event-statuses.ts from src/shared/event_statuses.py.
+
+Usage: generate-event-statuses.py <output-path>
+
+src/shared/event_statuses.py is the single source of truth for event status
+strings. This script mirrors it into a TypeScript module so the Step
+Functions workflow (infra/lib/workflow.ts) can't drift from the Python
+values that actually get written to DynamoDB.
+"""
+
+import sys
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPO_ROOT))
+
+from src.shared.event_statuses import EventStatus  # noqa: E402
+
+HEADER = """// GENERATED FILE — do not edit by hand.
+// Source of truth: src/shared/event_statuses.py
+// Regenerated automatically by `npm run generate-event-statuses` (part of `npm run build`).
+"""
+
+
+def render(statuses: dict[str, str]) -> str:
+    entries = "\n".join(f"  {name}: '{value}'," for name, value in statuses.items())
+    return (
+        f"{HEADER}\n"
+        f"export const EventStatus = {{\n{entries}\n}} as const;\n\n"
+        f"export type EventStatusType = (typeof EventStatus)[keyof typeof EventStatus];\n"
+    )
+
+
+def main() -> None:
+    output_path = Path(sys.argv[1])
+    statuses = {name: value for name, value in vars(EventStatus).items() if not name.startswith("_")}
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    output_path.write_text(render(statuses))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/test_generate_event_statuses.py b/tests/test_generate_event_statuses.py
new file mode 100644
index 0000000..5c79f05
--- /dev/null
+++ b/tests/test_generate_event_statuses.py
@@ -0,0 +1,44 @@
+"""Unit tests for scripts/generate-event-statuses.py."""
+
+import importlib.util
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+SCRIPT_PATH = REPO_ROOT / "scripts" / "generate-event-statuses.py"
+
+_spec = importlib.util.spec_from_file_location("generate_event_statuses", SCRIPT_PATH)
+generate_event_statuses = importlib.util.module_from_spec(_spec)
+_spec.loader.exec_module(generate_event_statuses)
+
+
+def test_render_mirrors_provided_statuses():
+    output = generate_event_statuses.render({"FOO": "FOO", "BAR": "BAR_VALUE"})
+
+    assert "FOO: 'FOO'," in output
+    assert "BAR: 'BAR_VALUE'," in output
+    assert "export const EventStatus" in output
+    assert "as const" in output
+    assert "export type EventStatusType" in output
+
+
+def test_render_preserves_insertion_order():
+    output = generate_event_statuses.render({"A": "1", "B": "2", "C": "3"})
+
+    assert output.index("A: '1'") < output.index("B: '2'") < output.index("C: '3'")
+
+
+def test_main_mirrors_every_real_event_status(tmp_path, monkeypatch):
+    from src.shared.event_statuses import EventStatus
+
+    output_path = tmp_path / "event-statuses.ts"
+    monkeypatch.setattr("sys.argv", ["generate-event-statuses.py", str(output_path)])
+
+    generate_event_statuses.main()
+
+    content = output_path.read_text()
+    expected = {name: value for name, value in vars(EventStatus).items() if not name.startswith("_")}
+
+    assert expected, "EventStatus should not be empty"
+    for name, value in expected.items():
+        assert f"{name}: '{value}'," in content
+    assert "GENERATED FILE" in content