Build handwritten Go, Python, PHP, Rust and C# SDKs

[purpshell]

Summary

Adds handwritten Go, Python, PHP, Rust and C# SDKs alongside TypeScript, with typed APIs, webhooks and runnable examples.

Feature counterparts and later fixes must cover all six languages. The agent guide and small PR template record that rule.

Verification

Five custom UI + Inspector videos show native sends, signed webhook replies and reloads using local simulated WhatsApp numbers. Language checks, host HTTP tests, TypeScript checking, lint and formatting passed locally. Final hosted CI remains separate.

Release status

Development work. Matching API acceptance, final CI and registry publication remain release gates; these demos do not claim production availability.

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Important

Draft PR not reviewed

Draft PRs are not automatically reviewed by default.

• Trigger a manual review

To automatically review draft PRs, update your CodeRabbit configuration:

reviews:
  auto_review:
    drafts: true

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

_{Comment @coderabbitai help to get the list of available commands.}