Molten Hub Code: reduce-codebase-centralize-classes

[jefking]

Proposed changes from Molten.Bot

This PR implements the requested changes described below.
Built using an AI augmented engineering and reviewed before submission.
Only relevant files were modified.

Original task prompt:

Refactor this repository to reduce the codebase size and centralize duplicated classes, types, and shared logic.

Task:
- Use the most appropriate existing abstractions.
- Remove redundancy instead of layering new wrappers.
- Preserve behavior.
- Avoid regressions.
- Keep the diff focused on the reduction/centralization goal.

Validation:
- Validate the result with focused tests and any existing local verification the repository supports before finishing.
- If local test or validation tooling is unavailable in this runtime, for example `command not found`, do not fail solely for that. Continue with any alternative checks available and clearly report the validation gap.

Failure reporting:
- If failures occur, send a response back to the calling agent with these fields:
  `Failure:` <short failure summary>
  `Error details:` <failing command, log detail, or concrete blocker>.

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