BLD15: the Go build module declares its finding stream and hears the keeper's ask

Part of BLD15: the manifest's stream mesh-build-go-findings (the three
finding events, 7 days, 16 MiB) and the consume of mesh-conditions.findings-asked.
The module's writing of findings through mesh-sdk's finding writer waits for
the writer (the writer's API is an open design question, D-16).

Builds: design 47 G §383, §384, §387

Claude-Session: https://claude.ai/code/session_01JG73KEq4zoDfM9WtYpcQgZ

modules/mesh-build-go/cmd/mesh-build-go/emit_test.go

@@ -49,7 +49,7 @@ func TestTheManifestDeclaresTheToolchainsStream(t *testing.T) {
 			Events []string `json:"events"`
 		} `json:"streams"`
 	}
-	if err := json.Unmarshal(raw, &m); err != nil || len(m.Streams) != 1 || m.Streams[0].Name != "toolchains-go" || !slices.Equal(m.Streams[0].Events, []string{"toolchain.**"}) {
+	if err := json.Unmarshal(raw, &m); err != nil || len(m.Streams) < 1 || m.Streams[0].Name != "toolchains-go" || !slices.Equal(m.Streams[0].Events, []string{"toolchain.**"}) {
 		t.Errorf("streams = %+v (%v)", m.Streams, err)
 	}
 }

modules/mesh-build-go/cmd/mesh-build-go/manifest_test.go

@@ -190,6 +190,19 @@ func TestTheModuleInvokesTheArtifactSeatsVerbsAndWritesNoStore(t *testing.T) {
 	if slices.Contains(m.Consumes, "mesh-delivery-builder.version.numbered") {
 		t.Errorf("consumes %v still hear version.numbered", m.Consumes)
 	}
+	// An observer says its findings on a stream of its own and hears the keeper's ask (design 47 G §383, §384, §387).
+	if !slices.Contains(m.Consumes, "mesh-conditions.findings-asked") {
+		t.Errorf("consumes %v lack mesh-conditions.findings-asked", m.Consumes)
+	}
+	found := false
+	for _, st := range m.Streams {
+		if st.Name == "mesh-build-go-findings" {
+			found = slices.Equal(st.Events, []string{"finding-written.*", "finding-cleared.*", "findings-stated.*"}) && st.MaxAgeDays == 7 && st.MaxMiB == 16
+		}
+	}
+	if !found {
+		t.Errorf("streams %+v lack mesh-build-go-findings (7 days, 16 MiB)", m.Streams)
+	}
 	for _, r := range m.Resources {
 		if r["id"] == "registry" {
 			t.Errorf("the store's address is still placed: %v", r)

modules/mesh-build-go/module.json

@@ -24,6 +24,9 @@
       "serves": ["current", "drop", "pause", "resume", "steps"]
     }
   ],
+  "consumes": [
+    "mesh-conditions.findings-asked"
+  ],
   "reads": [
     "mesh-delivery-checker.kept"
   ],
@@ -78,6 +81,12 @@
     {
       "name": "toolchains-go",
       "events": ["toolchain.**"]
+    },
+    {
+      "name": "mesh-build-go-findings",
+      "events": ["finding-written.*", "finding-cleared.*", "findings-stated.*"],
+      "max-age-days": 7,
+      "max-mib": 16
     }
   ],
   "requires": [