## Summary
- `objdumperClass: any` → `new () => BaseObjdumper`
- `executionEnvironmentClass: any` → `typeof LocalExecutionEnvironment`
Used a constructor type for `objdumperClass` since `BaseObjdumper` is
abstract and `typeof BaseObjdumper` wouldn't allow instantiation.
### Additional fix
This change exposed a latent type issue: `ObjdumpResult.asm` is `string
| undefined`, but was being passed directly to
`postProcessObjdumpOutput(output: string)`. Added a nullish coalescing
fallback (`?? ''`) for safety.
## Test plan
- [x] `npm run ts-check` passes
- [x] `npm run test-min` passes
- [x] Pre-commit hooks pass
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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