Bundled binary crashes with TypeError on namespace re-exports

[sjawhar]

Bug description

The Bun-bundled binary crashes at startup with errors like:

TypeError: undefined is not an object (evaluating 'Snapshot2.FileDiff.array')
TypeError: undefined is not an object (evaluating 'ProviderAuth2.Authorization.optional')

Root cause

Nine facade files (e.g. src/snapshot/index.ts, src/provider/auth.ts) re-export values from a service module inside a TypeScript namespace:

import { Snapshot as S } from "./service"
export namespace Snapshot {
  export const FileDiff = S.FileDiff
}

Bun's bundler transpiles this into self-referential assignments (Snapshot.FileDiff = Snapshot.FileDiff). When circular imports delay module initialization, the right-hand side is undefined.

Steps to reproduce

1. Introduce any circular dependency chain that passes through one of these facade modules
2. Build with bun run build --single
3. Run the binary — crashes before startup completes

Expected behavior

Binary starts without TypeError.

Environment

• Bun 1.3.10
• opencode built with --single flag

[github-actions]

This issue might be a duplicate of an existing issue. Please check:

• Standalone binary from build.ts --single produces black screen + freeze #18451: Same crash — TypeError: undefined is not an object (evaluating 'Snapshot2.FileDiff.array') — caused by the same circular dependency / namespace re-export problem in the --single bundled binary. That issue also tracks the bisect result and links to related PRs (fix: apply Layer.fresh at instance service definition site #18418, fix: switch consumers to service imports to break bundle cycles #18438).

Please check whether #18451 already covers your case. If so, it may be best to add any new details there.