fix(adapters): emit correct provider/model schema per harness

internal/adapters/kilo/kilo.go

@@ -66,8 +66,14 @@ func (a *Adapter) Render(b *canonical.Bundle) (*adapter.FileSet, error) {
 
 	cfgPath := filepath.Join(base, "kilo.json")
 	existing, _ := os.ReadFile(cfgPath)
-	overlay := map[string]any{
-		"model": b.Profile.Gateway.DefaultModel,
+	modelStr := common.KiloModelString(&b.Profile)
+	overlay := map[string]any{}
+	if providers := common.ProvidersAsMap(&b.Profile); len(providers) > 0 {
+		overlay["provider"] = providers
+	}
+	if modelStr != "" {
+		overlay["model"] = modelStr
+		overlay["small_model"] = modelStr
 	}
 	if mcp := common.BuildMCPMapStyled(&b.MCP, common.MCPOpencodeStyle); len(mcp) > 0 {
 		overlay["mcp"] = mcp

internal/adapters/kilo/kilo_test.go

@@ -42,12 +42,18 @@ func TestKiloRender(t *testing.T) {
 
 	var parsed map[string]any
 	require.NoError(t, json.Unmarshal(seen[cfgDest].Content, &parsed))
-	assert.Equal(t, "sonnet", parsed["model"])
+	// model is "providerID/modelID" string.
+	assert.Equal(t, "harness-sync-gateway/sonnet", parsed["model"])
+	assert.Equal(t, "harness-sync-gateway/sonnet", parsed["small_model"])
+	// provider map present with npm field.
+	provider, ok := parsed["provider"].(map[string]any)
+	require.True(t, ok, "provider must be a map")
+	gw, ok := provider["harness-sync-gateway"].(map[string]any)
+	require.True(t, ok)
+	assert.Equal(t, "@ai-sdk/openai-compatible", gw["npm"])
 	assert.Contains(t, parsed, "mcp")
 	assert.NotContains(t, parsed, "default_model")
 	assert.NotContains(t, parsed, "mcpServers")
-	// kilo has no "providers" concept.
-	assert.NotContains(t, parsed, "providers")
 	// MCP entries use local/remote type (MCPOpencodeStyle).
 	mcp := parsed["mcp"].(map[string]any)
 	fp := mcp["filepuff"].(map[string]any)
@@ -85,11 +91,43 @@ func TestKiloRenderMergesExistingKeys(t *testing.T) {
 	require.NoError(t, json.Unmarshal(seen[cfgDest].Content, &parsed))
 	// User keys preserved.
 	assert.Equal(t, "https://kilo.schema/v1", parsed["$schema"])
-	assert.Equal(t, "claude-haiku", parsed["small_model"])
 	assert.Contains(t, parsed, "compaction")
-	// Model updated.
-	assert.Equal(t, "sonnet", parsed["model"])
+	// Model updated to providerID/modelID; small_model also set.
+	assert.Equal(t, "harness-sync-gateway/sonnet", parsed["model"])
+	assert.Equal(t, "harness-sync-gateway/sonnet", parsed["small_model"])
 }
+func TestKiloRenderEmitsModelString(t *testing.T) {
+	home := t.TempDir()
+	ad := New(WithHome(home))
+	b := &canonical.Bundle{
+		Profile: canonical.Profile{
+			Gateway: canonical.Gateway{URL: "https://gw", Token: "tok", DefaultModel: "claude-sonnet-4-6"},
+		},
+	}
+	fs, err := ad.Render(b)
+	require.NoError(t, err)
+	seen := map[string]adapter.File{}
+	fs.ForEach(func(f adapter.File) { seen[f.Dest] = f })
+
+	cfgDest := filepath.Join(home, ".config", "kilo", "kilo.json")
+	var parsed map[string]any
+	require.NoError(t, json.Unmarshal(seen[cfgDest].Content, &parsed))
+
+	// model must be "harness-sync-gateway/<modelID>".
+	assert.Equal(t, "harness-sync-gateway/claude-sonnet-4-6", parsed["model"])
+	assert.Equal(t, "harness-sync-gateway/claude-sonnet-4-6", parsed["small_model"])
+
+	// provider map has npm field.
+	provider, ok := parsed["provider"].(map[string]any)
+	require.True(t, ok)
+	gw, ok := provider["harness-sync-gateway"].(map[string]any)
+	require.True(t, ok)
+	assert.Equal(t, "@ai-sdk/openai-compatible", gw["npm"])
+	opts, ok := gw["options"].(map[string]any)
+	require.True(t, ok)
+	assert.Equal(t, "https://gw", opts["baseURL"])
+}
+
 func TestKiloImport(t *testing.T) {
 	home := t.TempDir()
 	base := filepath.Join(home, ".config", "kilo")