Define adapter interfaces and fake implementations

internal/adapters/audita/fake.go

@@ -0,0 +1,40 @@
+package audita
+
+import "context"
+
+// NoopRunner is a deterministic no-op audita adapter.
+type NoopRunner struct{}
+
+// Run returns requested output path with placeholder metadata.
+func (n *NoopRunner) Run(ctx context.Context, req PolishRequest) (PolishResult, error) {
+	if err := ctx.Err(); err != nil {
+		return PolishResult{}, err
+	}
+	return PolishResult{ProcessedTranscriptPath: req.OutputProcessedPath, Metadata: map[string]any{"placeholder": true}}, nil
+}
+
+// FakeRunner captures polish requests and returns deterministic responses.
+type FakeRunner struct {
+	Requests []PolishRequest
+	Err      error
+	Result   PolishResult
+}
+
+// Run records request and returns configured response.
+func (f *FakeRunner) Run(ctx context.Context, req PolishRequest) (PolishResult, error) {
+	if err := ctx.Err(); err != nil {
+		return PolishResult{}, err
+	}
+	f.Requests = append(f.Requests, req)
+	if f.Err != nil {
+		return PolishResult{}, f.Err
+	}
+	res := f.Result
+	if res.ProcessedTranscriptPath == "" {
+		res.ProcessedTranscriptPath = req.OutputProcessedPath
+	}
+	if res.Metadata == nil {
+		res.Metadata = map[string]any{"fake": true}
+	}
+	return res, nil
+}

internal/adapters/audita/fake_test.go

@@ -0,0 +1,31 @@
+package audita
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+func TestFakeRunnerCapturesRequestAndReturnsPath(t *testing.T) {
+	fake := &FakeRunner{}
+	req := PolishRequest{GeneratedConfigPath: "config/audita.yml", OutputProcessedPath: "transcripts/processed.json"}
+
+	res, err := fake.Run(context.Background(), req)
+	if err != nil {
+		t.Fatalf("Run() error = %v", err)
+	}
+	if len(fake.Requests) != 1 || fake.Requests[0].GeneratedConfigPath == "" {
+		t.Fatalf("requests = %#v, want captured request", fake.Requests)
+	}
+	if res.ProcessedTranscriptPath != req.OutputProcessedPath {
+		t.Fatalf("processed path = %q, want %q", res.ProcessedTranscriptPath, req.OutputProcessedPath)
+	}
+}
+
+func TestFakeRunnerError(t *testing.T) {
+	fake := &FakeRunner{Err: errors.New("boom")}
+	_, err := fake.Run(context.Background(), PolishRequest{})
+	if err == nil {
+		t.Fatal("expected error, got nil")
+	}
+}

internal/adapters/audita/runner.go

@@ -3,18 +3,22 @@ package audita
 
 import "context"
 
-// Runner is a placeholder adapter interface for audita invocation.
+// Runner is the adapter boundary for audita polish invocations.
 type Runner interface {
 	Run(ctx context.Context, req PolishRequest) (PolishResult, error)
 }
 
-// PolishRequest is a placeholder polish input.
+// PolishRequest describes an audita invocation.
 type PolishRequest struct {
+	GeneratedConfigPath  string
 	MergedTranscriptPath string
-	OutputPath           string
+	OutputProcessedPath  string
+	StdoutLogPath        string
+	StderrLogPath        string
 }
 
-// PolishResult is a placeholder polish output.
+// PolishResult describes a polish output.
 type PolishResult struct {
-	ProcessedPath string
+	ProcessedTranscriptPath string
+	Metadata                map[string]any
 }