fix(translator): strip thinking for NVIDIA glm-5.2 (port from 9router#2023) (#6413)

strip thinking for NVIDIA glm-5.2 (port #2023) (net +1/-0, test OK). Integrated into release/v3.8.46.

CHANGELOG.md

@@ -21,6 +21,7 @@
 
 ### 🐛 Bug Fixes
 
+- **fix(translator):** strip the Claude-style `thinking` field for **NVIDIA `z-ai/glm-5.2`**. NVIDIA's OpenAI-compatible wrapper 400s on `thinking` (a Claude-format client routed here leaves a `thinking:{type:"adaptive"}`); the existing strip rule only dropped `reasoning`. Same class already handled for `minimax-m2.7`. Regression guard: `tests/unit/nvidia-minimax-thinking-strip.test.ts` (+glm-5.2 case). (thanks @phidinhmanh)
 - **fix(translator):** suppress the streamed `</think>` close marker for the **Antigravity IDE** client. On thinking-only turns Antigravity rendered a bare `</think>` as the sole visible content, tripping its loop-detection and wasting requests. Antigravity's UA (`vscode/<v> (Antigravity/<v>)`) is added to the marker-suppress allowlist (alongside OpenCode); Claude Code / Cursor still get the marker, and `x-omniroute-thinking-marker: on` force-restores it. Regression guard: `tests/unit/think-close-marker-suppress-5245.test.ts`. (thanks @abdofallah)
 - **fix(executors):** strip nested `reasoning_content` from messages for **Mistral**. Mistral's API returns `422 extra_forbidden` when an assistant message carries `reasoning_content` (replayed thinking from a prior turn, e.g. via the Codex `/responses` path); the generic top-level 400 field-downgrade retry never covered the nested per-message field. `DefaultExecutor` now strips it for provider `mistral` only, so DeepSeek (which requires replayed `reasoning_content`) is unaffected. Regression guard: `tests/unit/mistral-strip-reasoning-content-1649.test.ts`. (thanks @xxy9468615)
 - **fix(executors):** strip the `client_metadata` passthrough field on the **OpenCode** path. OpenCode upstreams (e.g. `kimi-k2.6` via opencode-go) reject it with `400 "Extra inputs are not permitted, field: 'client_metadata'"`; the DefaultExecutor strip only covered cerebras/mistral and `OpencodeExecutor` extends `BaseExecutor` directly, so nothing removed it there. Regression guard: `tests/unit/opencode-strip-client-metadata-1442.test.ts`. (thanks @yanpaing007)

open-sse/translator/paramSupport.ts

@@ -29,9 +29,12 @@ const STRIP_RULES: StripRule[] = [
       /claude/i.test(m) && !/claude.*(opus|sonnet).*4\.6/i.test(m),
     drop: ["thinking", "reasoning_effort"],
   },
-  // NVIDIA NIM z-ai/glm-5.2: OpenAI-compatible wrapper rejects the `reasoning`
-  // body field → HTTP 400 "Unsupported parameter(s): `reasoning`". #6102 drop pattern.
-  { provider: "nvidia", match: /z-ai\/glm-5\.2\b/i, drop: ["reasoning"] },
+  // NVIDIA NIM z-ai/glm-5.2: OpenAI-compatible wrapper rejects BOTH the `reasoning`
+  // body field (#6102) and the Claude-style `thinking` field. A Claude-format
+  // client (e.g. Claude Code) routed here leaves a `thinking:{type:"adaptive"}`
+  // that the wrapper 400s on — same class already handled for minimax-m2.7 below.
+  // 9router#2023.
+  { provider: "nvidia", match: /z-ai\/glm-5\.2\b/i, drop: ["reasoning", "thinking"] },
   // NVIDIA NIM minimaxai/minimax-m2.7: NVIDIA's OpenAI-compatible wrapper
   // (format:"openai") does not accept the Claude-style `thinking` body field
   // and returns 400 "Unsupported parameter(s): thinking". Upstream #2268.

tests/unit/nvidia-minimax-thinking-strip.test.ts

@@ -24,6 +24,19 @@ test("stripUnsupportedParams: nvidia + minimaxai/minimax-m2.7 drops thinking", (
   assert.equal(body.model, "minimaxai/minimax-m2.7", "model must not be touched");
 });
 
+test("stripUnsupportedParams: nvidia + z-ai/glm-5.2 drops thinking AND reasoning (port from 9router#2023)", () => {
+  const body: Record<string, unknown> = {
+    model: "z-ai/glm-5.2",
+    thinking: { type: "adaptive" },
+    reasoning: { effort: "high" },
+    max_tokens: 512,
+  };
+  stripUnsupportedParams("nvidia", "z-ai/glm-5.2", body);
+  assert.equal(body.thinking, undefined, "thinking must be stripped for NVIDIA glm-5.2");
+  assert.equal(body.reasoning, undefined, "reasoning must still be stripped for NVIDIA glm-5.2");
+  assert.equal(body.max_tokens, 512, "other params must survive");
+});
+
 test("stripUnsupportedParams: nvidia + other model KEEPS thinking (regression guard)", () => {
   const body: Record<string, unknown> = { thinking: { type: "adaptive" } };
   stripUnsupportedParams("nvidia", "some-other-model", body);