test: tighten shared process map and model coverage

src/shared/model-param-b.test.ts

@@ -5,10 +5,13 @@ describe("shared/model-param-b", () => {
   it("extracts the largest valid b-sized parameter token", () => {
     expect(inferParamBFromIdOrName("llama-8b mixtral-22b")).toBe(22);
     expect(inferParamBFromIdOrName("Qwen 0.5B Instruct")).toBe(0.5);
+    expect(inferParamBFromIdOrName("prefix M7B and q4_32b")).toBe(32);
   });
 
   it("ignores malformed, zero, and non-delimited matches", () => {
     expect(inferParamBFromIdOrName("abc70beta 0b x70b2")).toBeNull();
     expect(inferParamBFromIdOrName("model 0b")).toBeNull();
+    expect(inferParamBFromIdOrName("model b5")).toBeNull();
+    expect(inferParamBFromIdOrName("foo70bbar")).toBeNull();
   });
 });

src/shared/process-scoped-map.test.ts

@@ -26,4 +26,14 @@ describe("shared/process-scoped-map", () => {
 
     expect(second).not.toBe(first);
   });
+
+  it("reuses a prepopulated process map without replacing it", () => {
+    const existing = new Map<string, number>([["a", 1]]);
+    (process as unknown as Record<symbol, unknown>)[MAP_KEY] = existing;
+
+    const resolved = resolveProcessScopedMap<number>(MAP_KEY);
+
+    expect(resolved).toBe(existing);
+    expect(resolved.get("a")).toBe(1);
+  });
 });