Add droid and cursor sync targets, extract shared path helpers

- Add sync --target droid (skills to ~/.factory/skills/)
- Add sync --target cursor (skills + MCP to .cursor/)
- Extract expandHome/resolveTargetHome to src/utils/resolve-home.ts
- Remove duplicated path helpers from convert.ts and install.ts
- Bump version to 0.6.0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/sync/cursor.ts

@@ -0,0 +1,78 @@
+import fs from "fs/promises"
+import path from "path"
+import type { ClaudeHomeConfig } from "../parsers/claude-home"
+import type { ClaudeMcpServer } from "../types/claude"
+import { forceSymlink, isValidSkillName } from "../utils/symlink"
+
+type CursorMcpServer = {
+  command?: string
+  args?: string[]
+  url?: string
+  env?: Record<string, string>
+  headers?: Record<string, string>
+}
+
+type CursorMcpConfig = {
+  mcpServers: Record<string, CursorMcpServer>
+}
+
+export async function syncToCursor(
+  config: ClaudeHomeConfig,
+  outputRoot: string,
+): Promise<void> {
+  const skillsDir = path.join(outputRoot, "skills")
+  await fs.mkdir(skillsDir, { recursive: true })
+
+  for (const skill of config.skills) {
+    if (!isValidSkillName(skill.name)) {
+      console.warn(`Skipping skill with invalid name: ${skill.name}`)
+      continue
+    }
+    const target = path.join(skillsDir, skill.name)
+    await forceSymlink(skill.sourceDir, target)
+  }
+
+  if (Object.keys(config.mcpServers).length > 0) {
+    const mcpPath = path.join(outputRoot, "mcp.json")
+    const existing = await readJsonSafe(mcpPath)
+    const converted = convertMcpForCursor(config.mcpServers)
+    const merged: CursorMcpConfig = {
+      mcpServers: {
+        ...(existing.mcpServers ?? {}),
+        ...converted,
+      },
+    }
+    await fs.writeFile(mcpPath, JSON.stringify(merged, null, 2), { mode: 0o600 })
+  }
+}
+
+async function readJsonSafe(filePath: string): Promise<Partial<CursorMcpConfig>> {
+  try {
+    const content = await fs.readFile(filePath, "utf-8")
+    return JSON.parse(content) as Partial<CursorMcpConfig>
+  } catch (err) {
+    if ((err as NodeJS.ErrnoException).code === "ENOENT") {
+      return {}
+    }
+    throw err
+  }
+}
+
+function convertMcpForCursor(
+  servers: Record<string, ClaudeMcpServer>,
+): Record<string, CursorMcpServer> {
+  const result: Record<string, CursorMcpServer> = {}
+  for (const [name, server] of Object.entries(servers)) {
+    const entry: CursorMcpServer = {}
+    if (server.command) {
+      entry.command = server.command
+      if (server.args && server.args.length > 0) entry.args = server.args
+      if (server.env && Object.keys(server.env).length > 0) entry.env = server.env
+    } else if (server.url) {
+      entry.url = server.url
+      if (server.headers && Object.keys(server.headers).length > 0) entry.headers = server.headers
+    }
+    result[name] = entry
+  }
+  return result
+}