From d075d27885fa70d1450390e1e41955a48910ebbe Mon Sep 17 00:00:00 2001
From: Christopher Monsanto <chris@monsan.to>
Date: Mon, 17 Aug 2026 00:13:46 -0400
Subject: [PATCH] Move BuildError to errors.ts

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 tools/build/errors.ts | 3 +++
 tools/build/graph.ts  | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)
 create mode 100644 tools/build/errors.ts

diff --git a/tools/build/errors.ts b/tools/build/errors.ts
new file mode 100644
index 00000000..3051f8bd
--- /dev/null
+++ b/tools/build/errors.ts
@@ -0,0 +1,3 @@
+
+// User-facing build failure: printed without a stack trace.
+export class BuildError extends Error {}
diff --git a/tools/build/graph.ts b/tools/build/graph.ts
index d7008170..ba25dad7 100644
--- a/tools/build/graph.ts
+++ b/tools/build/graph.ts
@@ -1,7 +1,8 @@
 
 import type {RuleDecl} from './api.ts';
+import {BuildError} from './errors.ts';
 
-export class BuildError extends Error {}
+export {BuildError};
 
 export interface GraphResult {
     order : RuleDecl[];           // topological, stable w.r.t. declaration order