fix(dev): Deno 2.8 compat for local function runner (Deno.serve getter)

[yurynix]

Note

Description

Fixes base44 dev failing under Deno 2.8, which redefined Deno.serve as a getter-only property. The previous direct assignment (Deno.serve = ...) now throws at runtime. This PR uses Object.defineProperty to override Deno.serve so the runtime works on both pre-2.8 (writable property) and 2.8+ (accessor) versions of Deno.

Related Issue

None

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Other (please describe):

Changes Made

• Extracted the Deno.serve patch logic into a patchedServe constant in packages/cli/deno-runtime/main.ts.
• Replaced the direct Deno.serve = ... assignment (which fails on Deno 2.8) with Object.defineProperty(Deno, "serve", { value: patchedServe, writable: true, configurable: true }).
• Removed the @ts-expect-error previously needed for the direct assignment.
• Added a comment explaining the Deno 2.8 getter-only behavior and the compatibility rationale.

Testing

• I have tested these changes locally
• I have added/updated tests as needed
• All tests pass (npm test)

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have updated `docs/` (AGENTS.md) if I made architectural changes

Additional Notes

Behavior on older Deno versions is preserved: defineProperty works on both the previous writable property and the new accessor. No public CLI surface changes.

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_{🤖 Generated by Claude | 2026-06-02 11:43 UTC | ff4dead}

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