Zed-hosted requests are re-mapped to the narrower enums the Zed proxy validates. Responses input items with `role: "developer"` go back to `system` (#13362). For Gemini, `safetySettings[].threshold: "OFF"` becomes `BLOCK_NONE` and `functionCallingConfig.mode` `VALIDATED`/`AUTO`/`ANY`/`NONE` become Zed's lowercase `auto`/`any`/`none` (#13363). Chosen over #13541, which carried the identical commit.
Maintainer changes: the inline mapping used five `as any` casts, which `no-explicit-any` rejects in `open-sse/`. It is now two typed helpers (`adaptGeminiRequestForZed`, `adaptResponsesRequestForZed`, exposed through `__test__`) plus a small mode table; behavior is unchanged. Added `tests/unit/zed-hosted-proxy-enums-13362.test.ts` (4 cases). Zed suites 47/47; `check:open-sse-typecheck` clean.
Validated in one consolidated batch of this series (37 PRs boarded together on `release/v3.8.51`): `typecheck:core`, `check:open-sse-typecheck` and `check:dashboard-typecheck` clean; ESLint clean on every changed file; file-size, complexity, cognitive-complexity, changelog-integrity, docs-counts, docs-sync and migration-numbering gates green (only the pre-existing `open-sse/utils/stream.ts` file-size red remains, inherited from the base); 3,743 focused `node:test` cases plus 34 vitest cases green.
Thanks @KooshaPari!
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