fix(opencode): expose Claude thinking policy (#76760)

Summary:
- Adds an OpenCode provider-policy public artifact that delegates Claude thinking profiles, plus regression tests and a changelog entry for preserving `xhigh` on `opencode/claude-opus-4-7`.
- Reproducibility: yes. Source inspection on current main shows the model-switch path remaps unsupported store ... vider-policy-api` artifact for the fallback resolver; the proposed test exercises that stored-`xhigh` path.

Automerge notes:
- No ClawSweeper repair was needed after automerge opt-in.

Validation:
- ClawSweeper review passed for head efa152cca5.
- Required merge gates passed before the squash merge.

Prepared head SHA: efa152cca5
Review: https://github.com/openclaw/openclaw/pull/76760#issuecomment-4366483080

Co-authored-by: mkdev11 <MkDev11@users.noreply.github.com>

extensions/opencode/provider-policy-api.test.ts

@@ -0,0 +1,29 @@
+import { describe, expect, it } from "vitest";
+import { resolveThinkingProfile } from "./provider-policy-api.js";
+
+describe("opencode provider policy public artifact", () => {
+  it("exposes Claude Opus 4.7 thinking levels without loading the full provider plugin", () => {
+    expect(
+      resolveThinkingProfile({
+        provider: "opencode",
+        modelId: "claude-opus-4-7",
+      }),
+    ).toMatchObject({
+      levels: expect.arrayContaining([{ id: "xhigh" }, { id: "adaptive" }, { id: "max" }]),
+      defaultLevel: "off",
+    });
+  });
+
+  it("keeps adaptive-only Claude profiles aligned with Anthropic", () => {
+    const profile = resolveThinkingProfile({
+      provider: "opencode",
+      modelId: "claude-opus-4-6",
+    });
+
+    expect(profile).toMatchObject({
+      levels: expect.arrayContaining([{ id: "adaptive" }]),
+      defaultLevel: "adaptive",
+    });
+    expect(profile.levels.some((level) => level.id === "xhigh" || level.id === "max")).toBe(false);
+  });
+});

extensions/opencode/provider-policy-api.ts

@@ -0,0 +1,5 @@
+import { resolveClaudeThinkingProfile } from "openclaw/plugin-sdk/provider-model-shared";
+
+export function resolveThinkingProfile(params: { provider?: string; modelId: string }) {
+  return resolveClaudeThinkingProfile(params.modelId);
+}