Add campaign configuration support

internal/stage/prepare.go

@@ -25,6 +25,7 @@ func (prepareStage) Name() string { return "prepare" }
 func (prepareStage) Declares() IODecl {
 	return IODecl{
 		Inputs: []artifacts.Ref{
+			{Kind: "config", Category: "inputs", RelativePath: "campaign.yml"},
 			{Kind: "config", Category: "inputs", RelativePath: "session.yml"},
 			{Kind: "config", Category: "inputs", RelativePath: "pipeline.resolved.yml"},
 			{Kind: "config", Category: "inputs", RelativePath: "speakers.yml"},
@@ -59,21 +60,30 @@ func (prepareStage) Run(ctx context.Context, env *Env, m *manifest.Manifest) (*S
 		return nil, fmt.Errorf("prepare: ensure workdir layout: %w", err)
 	}
 
+	campaignSrc := env.Config.CampaignPath
+	if err := requireFile(campaignSrc, "campaign.yml"); err != nil {
+		return nil, fmt.Errorf("prepare: %w", err)
+	}
+
 	sessionSrc := env.Config.SessionPath
 	if err := requireFile(sessionSrc, "session.yml"); err != nil {
 		return nil, fmt.Errorf("prepare: %w", err)
 	}
 	sessionDir := filepath.Dir(sessionSrc)
 
-	speakersSrc, err := resolvePath(sessionDir, env.Config.Session.Inputs.SpeakersFile)
+	speakersInput := stableInputSource(env.Config.StableInputs.SpeakersFile, env.Config.Session.Inputs.SpeakersFile, sessionSrc)
+	autocorrectInput := stableInputSource(env.Config.StableInputs.AutocorrectFile, env.Config.Session.Inputs.AutocorrectFile, sessionSrc)
+	glossaryInput := stableInputSource(env.Config.StableInputs.GlossaryFile, env.Config.Session.Inputs.GlossaryFile, sessionSrc)
+
+	speakersSrc, err := resolveConfigRelativePath(speakersInput)
 	if err != nil {
 		return nil, fmt.Errorf("prepare: speakers path: %w", err)
 	}
-	autocorrectSrc, err := resolvePath(sessionDir, env.Config.Session.Inputs.AutocorrectFile)
+	autocorrectSrc, err := resolveConfigRelativePath(autocorrectInput)
 	if err != nil {
 		return nil, fmt.Errorf("prepare: autocorrect path: %w", err)
 	}
-	glossarySrc, err := resolvePath(sessionDir, env.Config.Session.Inputs.GlossaryFile)
+	glossarySrc, err := resolveConfigRelativePath(glossaryInput)
 	if err != nil {
 		return nil, fmt.Errorf("prepare: glossary path: %w", err)
 	}
@@ -96,17 +106,27 @@ func (prepareStage) Run(ctx context.Context, env *Env, m *manifest.Manifest) (*S
 		return nil, fmt.Errorf("prepare: resolve audio inputs: %w", err)
 	}
 
-	inputs := make([]manifest.InputRecord, 0, 5+len(resolvedLocalAudio))
+	inputs := make([]manifest.InputRecord, 0, 6+len(resolvedLocalAudio))
 	registerInput := func(kind, path, checksum string) {
 		inputs = append(inputs, manifest.InputRecord{Kind: kind, Path: path, Checksum: checksum})
 	}
+	registerConfigInput := func(kind, path, checksum, source string) {
+		inputs = append(inputs, manifest.InputRecord{Kind: kind, Path: path, Checksum: checksum, Source: source})
+	}
+
+	campaignDst := filepath.Join(paths.InputsDir, "campaign.yml")
+	campaignChecksum, err := copyFileIfChanged(env.ArtifactStore, campaignSrc, campaignDst)
+	if err != nil {
+		return nil, fmt.Errorf("prepare: materialize campaign.yml: %w", err)
+	}
+	registerConfigInput("campaign_config", campaignDst, campaignChecksum, "campaign_config")
 
 	sessionDst := filepath.Join(paths.InputsDir, "session.yml")
 	sessionChecksum, err := copyFileIfChanged(env.ArtifactStore, sessionSrc, sessionDst)
 	if err != nil {
 		return nil, fmt.Errorf("prepare: materialize session.yml: %w", err)
 	}
-	registerInput("session_config", sessionDst, sessionChecksum)
+	registerConfigInput("session_config", sessionDst, sessionChecksum, "session_config")
 
 	pipelineResolvedBytes, err := renderResolvedPipeline(env.Config.Pipeline)
 	if err != nil {
@@ -120,19 +140,20 @@ func (prepareStage) Run(ctx context.Context, env *Env, m *manifest.Manifest) (*S
 	registerInput("pipeline_resolved", pipelineDst, pipelineChecksum)
 
 	for _, cfgFile := range []struct {
-		kind string
-		src  string
-		dst  string
+		kind   string
+		src    string
+		dst    string
+		source string
 	}{
-		{kind: "speakers", src: speakersSrc, dst: filepath.Join(paths.InputsDir, "speakers.yml")},
-		{kind: "autocorrect", src: autocorrectSrc, dst: filepath.Join(paths.InputsDir, "autocorrect.yml")},
-		{kind: "glossary", src: glossarySrc, dst: filepath.Join(paths.InputsDir, "glossary.yml")},
+		{kind: "speakers", src: speakersSrc, dst: filepath.Join(paths.InputsDir, "speakers.yml"), source: speakersInput.Source},
+		{kind: "autocorrect", src: autocorrectSrc, dst: filepath.Join(paths.InputsDir, "autocorrect.yml"), source: autocorrectInput.Source},
+		{kind: "glossary", src: glossarySrc, dst: filepath.Join(paths.InputsDir, "glossary.yml"), source: glossaryInput.Source},
 	} {
 		checksum, err := copyFileIfChanged(env.ArtifactStore, cfgFile.src, cfgFile.dst)
 		if err != nil {
 			return nil, fmt.Errorf("prepare: materialize %s: %w", cfgFile.kind, err)
 		}
-		registerInput(cfgFile.kind, cfgFile.dst, checksum)
+		registerConfigInput(cfgFile.kind, cfgFile.dst, checksum, cfgFile.source)
 	}
 
 	if useS3Audio {
@@ -195,6 +216,31 @@ func renderResolvedPipeline(cfg *config.PipelineConfig) ([]byte, error) {
 	return yaml.Marshal(cfg)
 }
 
+func stableInputSource(resolved config.ResolvedInputFile, fallbackPath, fallbackConfigPath string) config.ResolvedInputFile {
+	if strings.TrimSpace(resolved.Path) != "" || strings.TrimSpace(resolved.ConfigPath) != "" || strings.TrimSpace(resolved.Source) != "" {
+		if strings.TrimSpace(resolved.ConfigPath) == "" {
+			resolved.ConfigPath = fallbackConfigPath
+		}
+		if strings.TrimSpace(resolved.Source) == "" {
+			resolved.Source = "session_config"
+		}
+		return resolved
+	}
+	return config.ResolvedInputFile{
+		Path:       fallbackPath,
+		ConfigPath: fallbackConfigPath,
+		Source:     "session_config",
+	}
+}
+
+func resolveConfigRelativePath(input config.ResolvedInputFile) (string, error) {
+	basePath := strings.TrimSpace(input.ConfigPath)
+	if basePath == "" {
+		return "", fmt.Errorf("source config path is required")
+	}
+	return resolvePath(filepath.Dir(basePath), input.Path)
+}
+
 func resolveAudioInputs(sessionDir string, inputs config.SessionInputsConfig) ([]string, bool, error) {
 	hasLocal := strings.TrimSpace(inputs.AudioDir) != "" || len(inputs.AudioFiles) > 0
 	if inputs.AudioS3 != nil {