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>

tests/sync-cursor.test.ts

@@ -0,0 +1,92 @@
+import { describe, expect, test } from "bun:test"
+import { promises as fs } from "fs"
+import path from "path"
+import os from "os"
+import { syncToCursor } from "../src/sync/cursor"
+import type { ClaudeHomeConfig } from "../src/parsers/claude-home"
+
+describe("syncToCursor", () => {
+  test("symlinks skills and writes mcp.json", async () => {
+    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "sync-cursor-"))
+    const fixtureSkillDir = path.join(import.meta.dir, "fixtures", "sample-plugin", "skills", "skill-one")
+
+    const config: ClaudeHomeConfig = {
+      skills: [
+        {
+          name: "skill-one",
+          sourceDir: fixtureSkillDir,
+          skillPath: path.join(fixtureSkillDir, "SKILL.md"),
+        },
+      ],
+      mcpServers: {
+        context7: { url: "https://mcp.context7.com/mcp" },
+        local: { command: "echo", args: ["hello"], env: { FOO: "bar" } },
+      },
+    }
+
+    await syncToCursor(config, tempRoot)
+
+    // Check skill symlink
+    const linkedSkillPath = path.join(tempRoot, "skills", "skill-one")
+    const linkedStat = await fs.lstat(linkedSkillPath)
+    expect(linkedStat.isSymbolicLink()).toBe(true)
+
+    // Check mcp.json
+    const mcpPath = path.join(tempRoot, "mcp.json")
+    const mcpConfig = JSON.parse(await fs.readFile(mcpPath, "utf8")) as {
+      mcpServers: Record<string, { url?: string; command?: string; args?: string[]; env?: Record<string, string> }>
+    }
+
+    expect(mcpConfig.mcpServers.context7?.url).toBe("https://mcp.context7.com/mcp")
+    expect(mcpConfig.mcpServers.local?.command).toBe("echo")
+    expect(mcpConfig.mcpServers.local?.args).toEqual(["hello"])
+    expect(mcpConfig.mcpServers.local?.env).toEqual({ FOO: "bar" })
+  })
+
+  test("merges existing mcp.json", async () => {
+    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "sync-cursor-merge-"))
+    const mcpPath = path.join(tempRoot, "mcp.json")
+
+    await fs.writeFile(
+      mcpPath,
+      JSON.stringify({ mcpServers: { existing: { command: "node", args: ["server.js"] } } }, null, 2),
+    )
+
+    const config: ClaudeHomeConfig = {
+      skills: [],
+      mcpServers: {
+        context7: { url: "https://mcp.context7.com/mcp" },
+      },
+    }
+
+    await syncToCursor(config, tempRoot)
+
+    const merged = JSON.parse(await fs.readFile(mcpPath, "utf8")) as {
+      mcpServers: Record<string, { command?: string; url?: string }>
+    }
+
+    expect(merged.mcpServers.existing?.command).toBe("node")
+    expect(merged.mcpServers.context7?.url).toBe("https://mcp.context7.com/mcp")
+  })
+
+  test("does not write mcp.json when no MCP servers", async () => {
+    const tempRoot = await fs.mkdtemp(path.join(os.tmpdir(), "sync-cursor-nomcp-"))
+    const fixtureSkillDir = path.join(import.meta.dir, "fixtures", "sample-plugin", "skills", "skill-one")
+
+    const config: ClaudeHomeConfig = {
+      skills: [
+        {
+          name: "skill-one",
+          sourceDir: fixtureSkillDir,
+          skillPath: path.join(fixtureSkillDir, "SKILL.md"),
+        },
+      ],
+      mcpServers: {},
+    }
+
+    await syncToCursor(config, tempRoot)
+
+    const mcpExists = await fs.access(path.join(tempRoot, "mcp.json")).then(() => true).catch(() => false)
+    expect(mcpExists).toBe(false)
+  })
+})