Hi @Feng-ATM,

Thanks for the PR! I see this is a large refactor with a lot of changes, including:

• Updates to the .env.example file with new variables.
• Addition of a new WebAssembly binary file (_tiktoken_bg.wasm).
• Major rewrite of action/index.cjs with tens of thousands of additions and deletions.

Could you please help by adding a summary to the PR description explaining:

• The goals of this refactor/change.
• Why the .wasm file was added and its purpose.
• Any breaking changes or things maintainers/reviewers should focus on.

Also, it would be helpful to have some inline comments in the code for key parts of the new logic, to make reviewing easier.

Looking forward to your clarifications before diving deeper into the code!

Thanks 🙂