feat: add wiki mvp commands (#532)

src/services/wiki/indexBuilder.ts

@@ -0,0 +1,68 @@
+import { readdir, readFile, writeFile } from 'fs/promises'
+import { basename, relative } from 'path'
+import { getWikiPaths } from './paths.js'
+
+async function listMarkdownFiles(dir: string): Promise<string[]> {
+  const entries = await readdir(dir, { withFileTypes: true })
+  const files: string[] = []
+
+  for (const entry of entries) {
+    const fullPath = `${dir}/${entry.name}`
+    if (entry.isDirectory()) {
+      files.push(...(await listMarkdownFiles(fullPath)))
+    } else if (entry.isFile() && entry.name.endsWith('.md')) {
+      files.push(fullPath)
+    }
+  }
+
+  return files.sort()
+}
+
+async function getPageTitle(path: string): Promise<string> {
+  const content = await readFile(path, 'utf8')
+  const titleLine = content
+    .split('\n')
+    .map(line => line.trim())
+    .find(line => line.startsWith('# '))
+
+  return titleLine ? titleLine.replace(/^#\s+/, '') : basename(path, '.md')
+}
+
+export async function rebuildWikiIndex(cwd: string): Promise<void> {
+  const paths = getWikiPaths(cwd)
+  const pageFiles = await listMarkdownFiles(paths.pagesDir)
+  const sourceFiles = await listMarkdownFiles(paths.sourcesDir)
+
+  const pageLinks = await Promise.all(
+    pageFiles.map(async file => {
+      const rel = relative(paths.root, file)
+      const title = await getPageTitle(file)
+      return `- [${title}](./${rel.replace(/\\/g, '/')})`
+    }),
+  )
+
+  const sourceLinks = sourceFiles.map(file => {
+    const rel = relative(paths.root, file).replace(/\\/g, '/')
+    const title = basename(file, '.md')
+    return `- [${title}](./${rel})`
+  })
+
+  const content = `# ${basename(cwd)} Wiki
+
+This wiki is maintained by OpenClaude as a durable project knowledge layer.
+
+## Core Pages
+
+${pageLinks.length > 0 ? pageLinks.join('\n') : '- No pages yet'}
+
+## Sources
+
+${sourceLinks.length > 0 ? sourceLinks.join('\n') : '- No sources yet'}
+
+## Recent Updates
+
+- See [log.md](./log.md)
+`
+
+  await writeFile(paths.indexFile, content, 'utf8')
+}