First slice of the TypeScript 7 migration split requested on #7697: resolve the
type diagnostics under `open-sse/tsconfig.json` in the lowest-risk modules, with
no toolchain change. 12 diagnostics across 8 files, all outside the hot path —
`chatCore.ts` and `stream.ts` are deliberately left for a later, standalone slice.
Fixes, by cause:
* `Transformer.cancel` (progressTracker, sseHeartbeat, and stream.ts's existing
handler) — the WHATWG Streams standard defines `transformer.cancel(reason)` and
Node implements it (verified on v24: cancelling the readable side invokes it),
but `lib.dom.d.ts` still omits it from `Transformer`, so every such handler was
TS2353. These handlers clear the heartbeat/progress intervals when an SSE client
disconnects, so deleting them to satisfy the checker would leak a timer per
abandoned stream. The interface is patched in `open-sse/types.d.ts` instead.
* `earlyStreamKeepalive` — `SettledHandler` was discriminated by `ok: true | false`.
This workspace compiles with `strictNullChecks: false`, where a boolean-literal
discriminant narrows the positive branch but not the negative one, so reading
`.error` off the rejected arm did not type-check (the two `.response` reads
elsewhere in the file did, which is why only one site errored). Retagged with a
string discriminant, which narrows both branches under the same settings.
* `toolCallShim` / `openai-responses` — assigning back to a property declared
`unknown` resets the `typeof` narrowing, so the following comparison no longer
saw a number/array. Both now read through a local. The `Read` limit clamp is
behavior-identical: its two branches are mutually exclusive at READ_MAX_LIMIT 2000.
* `sanitizeToolResultId` — takes `unknown` but forwards to a `string` parameter; a
non-string id previously reached `.replace()` and threw. Coerced instead.
* `openaiHelper` — `opts = {}` inferred `{}`; typed as `FilterToOpenAIFormatOptions`.
* `cursorAgentProtobuf` — `Buffer.alloc(0)` infers `Buffer<ArrayBuffer>` under
@types/node 26 while the decoded field is `Buffer<ArrayBufferLike>`; the locals
now use bare `Buffer`, matching `requestMetadata` a few lines above.
Validation: 335 -> 321 diagnostics with zero new errors (full tsc error-set diff
against the base config). typecheck:core clean, lint clean, check:type-coverage
92.17% -> 94.17%. All 114 existing test files that import a touched module pass;
`plan3-p0.test.ts` fails identically with and without this change (it reads the
developer's real ~/.omniroute DB instead of a test-scoped DATA_DIR).
The new test covers the three behavioral surfaces rather than the refactors the
existing keepalive/heartbeat suites already hold: that `transformer.cancel()`
really fires and can clear an interval, the id coercion, and the limit-clamp bounds.
v3.8.40 cycle integration → main. All test gates green (Unit/Integration/Coverage/Node-compat/Quality-Ratchet). The only red check, 'PR Test Policy', is the test-masking heuristic firing on the cumulative ~57-commit release diff (legitimate assert consolidations already reviewed per-PR — Gemini CLI removal #5246, retired GPT models #5280, provider catalog refreshes); overridden with --admin per the documented release-PR convention. CodeQL/SonarQube advisory scans non-blocking; #5278's code already passed CodeQL on main. Homologated on VPS 192.168.0.15 (v3.8.40 healthy).
OmniRoute is an intelligent API gateway that unifies 20+ AI providers behind a single
OpenAI-compatible endpoint. Features include intelligent routing with 6 strategies,
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semantic caching, combo fallback chains, real-time health monitoring, and a full
dashboard with provider management, analytics, and CLI tool integration.
Key highlights:
- 20+ providers (Claude Code, Codex, Gemini CLI, GitHub Copilot, iFlow, Qwen, Kiro, etc.)
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- Translator Playground with 4 modes (Playground, Chat Tester, Test Bench, Live Monitor)
- 100% TypeScript across src/ and open-sse/
- Docker support with multi-stage builds
- Comprehensive documentation and 9 dashboard screenshots
