feat: Add OpenClaw as conversion target

Add openclaw as the 8th conversion target, enabling:
  bunx @every-env/compound-plugin install compound-engineering --to openclaw

Converts Claude Code plugins into OpenClaw's extension format:
- Agents → skills/agent-*/SKILL.md
- Commands → api.registerCommand() + skills/cmd-*/SKILL.md
- Skills → copied verbatim with path rewriting (.claude/ → .openclaw/)
- MCP servers → openclaw.json config
- Generates openclaw.plugin.json manifest, package.json, and index.ts entry point

Output installs to ~/.openclaw/extensions/<plugin-name>/

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

src/converters/claude-to-openclaw.ts

@@ -0,0 +1,239 @@
+import { formatFrontmatter } from "../utils/frontmatter"
+import type {
+  ClaudeAgent,
+  ClaudeCommand,
+  ClaudePlugin,
+  ClaudeMcpServer,
+} from "../types/claude"
+import type {
+  OpenClawBundle,
+  OpenClawCommandRegistration,
+  OpenClawPluginManifest,
+  OpenClawSkillFile,
+} from "../types/openclaw"
+import type { ClaudeToOpenCodeOptions } from "./claude-to-opencode"
+
+export function convertClaudeToOpenClaw(
+  plugin: ClaudePlugin,
+  _options: ClaudeToOpenCodeOptions,
+): OpenClawBundle {
+  const manifest = buildManifest(plugin)
+  const packageJson = buildPackageJson(plugin)
+
+  const agentSkills = plugin.agents.map(convertAgentToSkill)
+  const commandSkills = plugin.commands
+    .filter((cmd) => !cmd.disableModelInvocation)
+    .map(convertCommandToSkill)
+
+  const commands = plugin.commands
+    .filter((cmd) => !cmd.disableModelInvocation)
+    .map(convertCommand)
+
+  const skills: OpenClawSkillFile[] = [...agentSkills, ...commandSkills]
+
+  const skillDirCopies = plugin.skills.map((skill) => ({
+    sourceDir: skill.sourceDir,
+    name: skill.name,
+  }))
+
+  // Add original skill names to manifest.skills
+  const allSkillDirs = [
+    ...agentSkills.map((s) => s.dir),
+    ...commandSkills.map((s) => s.dir),
+    ...plugin.skills.map((s) => s.name),
+  ]
+  manifest.skills = allSkillDirs.map((dir) => `skills/${dir}`)
+
+  const openclawConfig = plugin.mcpServers
+    ? buildOpenClawConfig(plugin.mcpServers)
+    : undefined
+
+  const entryPoint = generateEntryPoint(commands)
+
+  return {
+    manifest,
+    packageJson,
+    entryPoint,
+    skills,
+    skillDirCopies,
+    commands,
+    openclawConfig,
+  }
+}
+
+function buildManifest(plugin: ClaudePlugin): OpenClawPluginManifest {
+  return {
+    id: plugin.manifest.name,
+    name: formatDisplayName(plugin.manifest.name),
+    kind: "tool",
+  }
+}
+
+function buildPackageJson(plugin: ClaudePlugin): Record<string, unknown> {
+  return {
+    name: `openclaw-${plugin.manifest.name}`,
+    version: plugin.manifest.version,
+    type: "module",
+    private: true,
+    description: plugin.manifest.description,
+    main: "index.ts",
+    openclaw: {
+      extensions: [
+        {
+          id: plugin.manifest.name,
+          entry: "./index.ts",
+        },
+      ],
+    },
+    keywords: [
+      "openclaw",
+      "openclaw-plugin",
+      ...(plugin.manifest.keywords ?? []),
+    ],
+  }
+}
+
+function convertAgentToSkill(agent: ClaudeAgent): OpenClawSkillFile {
+  const frontmatter: Record<string, unknown> = {
+    name: agent.name,
+    description: agent.description,
+  }
+
+  if (agent.model && agent.model !== "inherit") {
+    frontmatter.model = agent.model
+  }
+
+  const body = rewritePaths(agent.body)
+  const content = formatFrontmatter(frontmatter, body)
+
+  return {
+    name: agent.name,
+    content,
+    dir: `agent-${agent.name}`,
+  }
+}
+
+function convertCommandToSkill(command: ClaudeCommand): OpenClawSkillFile {
+  const frontmatter: Record<string, unknown> = {
+    name: `cmd-${command.name}`,
+    description: command.description,
+  }
+
+  if (command.model && command.model !== "inherit") {
+    frontmatter.model = command.model
+  }
+
+  const body = rewritePaths(command.body)
+  const content = formatFrontmatter(frontmatter, body)
+
+  return {
+    name: command.name,
+    content,
+    dir: `cmd-${command.name}`,
+  }
+}
+
+function convertCommand(command: ClaudeCommand): OpenClawCommandRegistration {
+  return {
+    name: command.name.replace(/:/g, "-"),
+    description: command.description ?? `Run ${command.name}`,
+    acceptsArgs: Boolean(command.argumentHint),
+    body: rewritePaths(command.body),
+  }
+}
+
+function buildOpenClawConfig(
+  servers: Record<string, ClaudeMcpServer>,
+): Record<string, unknown> {
+  const mcpServers: Record<string, unknown> = {}
+
+  for (const [name, server] of Object.entries(servers)) {
+    if (server.command) {
+      mcpServers[name] = {
+        type: "stdio",
+        command: server.command,
+        args: server.args ?? [],
+        env: server.env,
+      }
+    } else if (server.url) {
+      mcpServers[name] = {
+        type: "http",
+        url: server.url,
+        headers: server.headers,
+      }
+    }
+  }
+
+  return { mcpServers }
+}
+
+function generateEntryPoint(commands: OpenClawCommandRegistration[]): string {
+  const commandRegistrations = commands
+    .map((cmd) => {
+      const escapedName = cmd.name.replace(/"/g, '\\"')
+      const escapedDesc = (cmd.description ?? "").replace(/"/g, '\\"')
+      return `  api.registerCommand({
+    name: "${escapedName}",
+    description: "${escapedDesc}",
+    acceptsArgs: ${cmd.acceptsArgs},
+    requireAuth: false,
+    handler: (ctx) => ({
+      text: skills["${escapedName}"] ?? "Command ${escapedName} not found. Check skills directory.",
+    }),
+  });`
+    })
+    .join("\n\n")
+
+  return `// Auto-generated OpenClaw plugin entry point
+// Converted from Claude Code plugin format by compound-plugin CLI
+import { promises as fs } from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+// Pre-load skill bodies for command responses
+const skills = {};
+
+async function loadSkills() {
+  const skillsDir = path.join(__dirname, "skills");
+  try {
+    const entries = await fs.readdir(skillsDir, { withFileTypes: true });
+    for (const entry of entries) {
+      if (!entry.isDirectory()) continue;
+      const skillPath = path.join(skillsDir, entry.name, "SKILL.md");
+      try {
+        const content = await fs.readFile(skillPath, "utf8");
+        // Strip frontmatter
+        const body = content.replace(/^---[\\s\\S]*?---\\n*/, "");
+        skills[entry.name.replace(/^cmd-/, "")] = body.trim();
+      } catch {
+        // Skill file not found, skip
+      }
+    }
+  } catch {
+    // Skills directory not found
+  }
+}
+
+export default async function register(api) {
+  await loadSkills();
+
+${commandRegistrations}
+}
+`
+}
+
+function rewritePaths(body: string): string {
+  return body
+    .replace(/~\/\.claude\//g, "~/.openclaw/")
+    .replace(/\.claude\//g, ".openclaw/")
+    .replace(/\.claude-plugin\//g, "openclaw-plugin/")
+}
+
+function formatDisplayName(name: string): string {
+  return name
+    .split("-")
+    .map((word) => word.charAt(0).toUpperCase() + word.slice(1))
+    .join(" ")
+}