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fix(codemode): return final top-level expression (#35759)

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Co-authored-by: Kit Langton <kit.langton@gmail.com>
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opencode-agent[bot] 2026-07-07 11:44:50 -05:00 • committed by GitHub
commit d0733f83bf
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4 changed files with 26 additions and 37 deletions
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18
packages/codemode/test/codemode.test.ts
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@ -1081,6 +1081,24 @@ describe("CodeMode public contract", () => {
expect(Schema.decodeUnknownSync(CodeMode.Result)(JSON.parse(JSON.stringify(result)))).toStrictEqual(result)
})
test("returns the final top-level expression when return is omitted", async () => {
const result = await Effect.runPromise(CodeMode.execute({ code: `1; 2` }))
expect(result).toStrictEqual({ ok: true, value: 2, toolCalls: [] })
})
test("does not implicitly return expressions nested in control flow", async () => {
const result = await Effect.runPromise(CodeMode.execute({ code: `if (true) { 2 }` }))
expect(result).toStrictEqual({ ok: true, value: null, toolCalls: [] })
})
test("returns null when the final top-level statement is not an expression", async () => {
const result = await Effect.runPromise(CodeMode.execute({ code: `1; const value = 2` }))
expect(result).toStrictEqual({ ok: true, value: null, toolCalls: [] })
})
test("rejects invalid configuration and discovery limits", async () => {
expect(() => CodeMode.execute({ code: "return 1", limits: { timeoutMs: 0 } })).toThrow(RangeError)
expect(() => CodeMode.execute({ code: "return 1", limits: { timeoutMs: Number.POSITIVE_INFINITY } })).toThrow(