feat(prdy): add PrdService as the single PRD authority surface (#1275)

- PrdService owns create/read/update/link/import/export; wizard and package
  CLI become prompt layers over the service (no second writer path)
- PRD documents gain a content version and a missions linkage array persisted
  in the YAML authority store (survives restart); linkage writes do not bump
  the content version
- exportMarkdown renders a labeled generated view (id + version + do-not-edit
  header) that no code path reads back; the store loads .yaml/.yml only
- importDocument validates structure with zod before anything else, persists
  valid imports as draft (validity is not approval), and refuses conflicts
  with a typed PrdImportConflictError carrying a proposed successor; the
  original document stays byte-identical until acceptSuccessor
- raw store writers (createPrd/savePrd) are no longer exported from the
  package entry point

packages/prdy/src/cli.ts

@@ -1,6 +1,6 @@
 import { Command } from 'commander';
 
-import { createPrd, listPrds, loadPrd } from './prd.js';
+import { PrdService } from './service.js';
 import { runPrdWizard } from './wizard.js';
 
 interface InitCommandOptions {
@@ -18,6 +18,22 @@ interface ShowCommandOptions {
   readonly id?: string;
 }
 
+interface ImportCommandOptions {
+  readonly project: string;
+  readonly file: string;
+  readonly acceptSuccessor?: boolean;
+}
+
+interface ExportCommandOptions {
+  readonly project: string;
+  readonly id?: string;
+  readonly out?: string;
+}
+
+function serviceFor(project: string): PrdService {
+  return new PrdService({ projectPath: project });
+}
+
 export function buildPrdyCli(): Command {
   const program = new Command();
   program.name('mosaic').description('Mosaic CLI').exitOverride();
@@ -38,11 +54,9 @@ export function buildPrdyCli(): Command {
             template: options.template,
             interactive: true,
           })
-        : await createPrd({
+        : await serviceFor(options.project).create({
             name: options.name,
-            projectPath: options.project,
             template: options.template,
-            interactive: false,
           });
 
       console.log(
@@ -52,6 +66,7 @@ export function buildPrdyCli(): Command {
             id: doc.id,
             title: doc.title,
             status: doc.status,
+            version: doc.version,
             projectPath: doc.projectPath,
           },
           null,
@@ -65,7 +80,7 @@ export function buildPrdyCli(): Command {
     .description('List PRD documents for a project')
     .requiredOption('--project <path>', 'Project path')
     .action(async (options: ListCommandOptions) => {
-      const docs = await listPrds(options.project);
+      const docs = await serviceFor(options.project).list();
       console.log(JSON.stringify(docs, null, 2));
     });
 
@@ -75,20 +90,65 @@ export function buildPrdyCli(): Command {
     .requiredOption('--project <path>', 'Project path')
     .option('--id <id>', 'PRD document id')
     .action(async (options: ShowCommandOptions) => {
-      if (options.id !== undefined) {
-        const docs = await listPrds(options.project);
-        const match = docs.find((doc) => doc.id === options.id);
+      const doc = await serviceFor(options.project).get(options.id);
+      console.log(JSON.stringify(doc, null, 2));
+    });
 
-        if (match === undefined) {
-          throw new Error(`PRD id not found: ${options.id}`);
-        }
+  prdy
+    .command('import')
+    .description('Import a YAML PRD document (validated; conflicts propose a successor)')
+    .requiredOption('--project <path>', 'Project path')
+    .requiredOption('--file <file>', 'Path to YAML PRD document')
+    .option('--accept-successor', 'Accept a conflicted import as the next version')
+    .action(async (options: ImportCommandOptions) => {
+      const service = serviceFor(options.project);
+      const input = { filePath: options.file };
 
-        console.log(JSON.stringify(match, null, 2));
+      if (options.acceptSuccessor) {
+        const successor = await service.acceptSuccessor(input);
+        console.log(
+          JSON.stringify(
+            {
+              ok: true,
+              outcome: 'successor-accepted',
+              id: successor.id,
+              version: successor.version,
+            },
+            null,
+            2,
+          ),
+        );
         return;
       }
 
-      const doc = await loadPrd(options.project);
-      console.log(JSON.stringify(doc, null, 2));
+      const result = await service.importDocument(input);
+      console.log(
+        JSON.stringify(
+          {
+            ok: true,
+            outcome: result.kind,
+            id: result.document.id,
+            version: result.document.version,
+            status: result.document.status,
+          },
+          null,
+          2,
+        ),
+      );
+    });
+
+  prdy
+    .command('export')
+    .description('Render a PRD to a labeled generated-view Markdown file')
+    .requiredOption('--project <path>', 'Project path')
+    .option('--id <id>', 'PRD document id')
+    .option('--out <path>', 'Output path (default docs/prdy/<id>.md)')
+    .action(async (options: ExportCommandOptions) => {
+      const result = await serviceFor(options.project).exportMarkdown({
+        id: options.id,
+        outPath: options.out,
+      });
+      console.log(JSON.stringify({ ok: true, filePath: result.filePath }, null, 2));
     });
 
   return program;