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fix: replace Literal types with str for typer CLI options #421

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fix: replace Literal types with str for typer CLI options #421

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@minorun365 minorun365 commented Jan 7, 2026

Summary

  • Fix RuntimeError when running CLI commands like agentcore dev
  • typer>=0.16.0 does not support typing.Literal, causing the following error: 
    RuntimeError: Type not yet supported: typing.Literal['basic', 'production']
  • Change type annotations from Literal types to str for typer options
  • Add runtime validation for template values

Steps to Reproduce

pip install -U bedrock-agentcore-starter-toolkit
agentcore dev

Test plan

  • agentcore dev runs without RuntimeError
  • agentcore --help displays properly
  • agentcore create --help displays properly
  • Related unit tests pass

@minorun365
fix: replace Literal types with str for typer CLI options
0e150bd 
typer>=0.16.0 does not support typing.Literal, causing RuntimeError
when running CLI commands like 'agentcore dev'.

- Change type annotations from Literal types to str for typer options
- Add runtime validation for template values
- Update type hints in helper functions
@minorun365 minorun365 mentioned this pull request Jan 18, 2026
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