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/targets/index.ts

@@ -6,6 +6,7 @@ import type { PiBundle } from "../types/pi"
 import type { CopilotBundle } from "../types/copilot"
 import type { GeminiBundle } from "../types/gemini"
 import type { KiroBundle } from "../types/kiro"
+import type { OpenClawBundle } from "../types/openclaw"
 import { convertClaudeToOpenCode, type ClaudeToOpenCodeOptions } from "../converters/claude-to-opencode"
 import { convertClaudeToCodex } from "../converters/claude-to-codex"
 import { convertClaudeToDroid } from "../converters/claude-to-droid"
@@ -13,6 +14,7 @@ import { convertClaudeToPi } from "../converters/claude-to-pi"
 import { convertClaudeToCopilot } from "../converters/claude-to-copilot"
 import { convertClaudeToGemini } from "../converters/claude-to-gemini"
 import { convertClaudeToKiro } from "../converters/claude-to-kiro"
+import { convertClaudeToOpenClaw } from "../converters/claude-to-openclaw"
 import { writeOpenCodeBundle } from "./opencode"
 import { writeCodexBundle } from "./codex"
 import { writeDroidBundle } from "./droid"
@@ -20,6 +22,7 @@ import { writePiBundle } from "./pi"
 import { writeCopilotBundle } from "./copilot"
 import { writeGeminiBundle } from "./gemini"
 import { writeKiroBundle } from "./kiro"
+import { writeOpenClawBundle } from "./openclaw"
 
 export type TargetHandler<TBundle = unknown> = {
   name: string
@@ -71,4 +74,10 @@ export const targets: Record<string, TargetHandler> = {
     convert: convertClaudeToKiro as TargetHandler<KiroBundle>["convert"],
     write: writeKiroBundle as TargetHandler<KiroBundle>["write"],
   },
+  openclaw: {
+    name: "openclaw",
+    implemented: true,
+    convert: convertClaudeToOpenClaw as TargetHandler<OpenClawBundle>["convert"],
+    write: writeOpenClawBundle as TargetHandler<OpenClawBundle>["write"],
+  },
 }

src/targets/openclaw.ts

@@ -0,0 +1,96 @@
+import path from "path"
+import { promises as fs } from "fs"
+import { backupFile, copyDir, ensureDir, pathExists, readJson, walkFiles, writeJson, writeText } from "../utils/files"
+import type { OpenClawBundle } from "../types/openclaw"
+
+export async function writeOpenClawBundle(outputRoot: string, bundle: OpenClawBundle): Promise<void> {
+  const paths = resolveOpenClawPaths(outputRoot)
+  await ensureDir(paths.root)
+
+  // Write openclaw.plugin.json
+  await writeJson(paths.manifestPath, bundle.manifest)
+
+  // Write package.json
+  await writeJson(paths.packageJsonPath, bundle.packageJson)
+
+  // Write index.ts entry point
+  await writeText(paths.entryPointPath, bundle.entryPoint)
+
+  // Write generated skills (agents + commands converted to SKILL.md)
+  for (const skill of bundle.skills) {
+    const skillDir = path.join(paths.skillsDir, skill.dir)
+    await ensureDir(skillDir)
+    await writeText(path.join(skillDir, "SKILL.md"), skill.content + "\n")
+  }
+
+  // Copy original skill directories (preserving references/, assets/, scripts/)
+  // and rewrite .claude/ paths to .openclaw/ in markdown files
+  for (const skill of bundle.skillDirCopies) {
+    const destDir = path.join(paths.skillsDir, skill.name)
+    await copyDir(skill.sourceDir, destDir)
+    await rewritePathsInDir(destDir)
+  }
+
+  // Write openclaw.json config fragment if MCP servers exist
+  if (bundle.openclawConfig) {
+    const configPath = path.join(paths.root, "openclaw.json")
+    const backupPath = await backupFile(configPath)
+    if (backupPath) {
+      console.log(`Backed up existing config to ${backupPath}`)
+    }
+    const merged = await mergeOpenClawConfig(configPath, bundle.openclawConfig)
+    await writeJson(configPath, merged)
+  }
+}
+
+function resolveOpenClawPaths(outputRoot: string) {
+  return {
+    root: outputRoot,
+    manifestPath: path.join(outputRoot, "openclaw.plugin.json"),
+    packageJsonPath: path.join(outputRoot, "package.json"),
+    entryPointPath: path.join(outputRoot, "index.ts"),
+    skillsDir: path.join(outputRoot, "skills"),
+  }
+}
+
+async function rewritePathsInDir(dir: string): Promise<void> {
+  const files = await walkFiles(dir)
+  for (const file of files) {
+    if (!file.endsWith(".md")) continue
+    const content = await fs.readFile(file, "utf8")
+    const rewritten = content
+      .replace(/~\/\.claude\//g, "~/.openclaw/")
+      .replace(/\.claude\//g, ".openclaw/")
+      .replace(/\.claude-plugin\//g, "openclaw-plugin/")
+    if (rewritten !== content) {
+      await fs.writeFile(file, rewritten, "utf8")
+    }
+  }
+}
+
+async function mergeOpenClawConfig(
+  configPath: string,
+  incoming: Record<string, unknown>,
+): Promise<Record<string, unknown>> {
+  if (!(await pathExists(configPath))) return incoming
+
+  let existing: Record<string, unknown>
+  try {
+    existing = await readJson<Record<string, unknown>>(configPath)
+  } catch {
+    console.warn(
+      `Warning: existing ${configPath} is not valid JSON. Writing plugin config without merging.`,
+    )
+    return incoming
+  }
+
+  // Merge MCP servers: existing takes precedence on conflict
+  const incomingMcp = (incoming.mcpServers ?? {}) as Record<string, unknown>
+  const existingMcp = (existing.mcpServers ?? {}) as Record<string, unknown>
+  const mergedMcp = { ...incomingMcp, ...existingMcp }
+
+  return {
+    ...existing,
+    mcpServers: Object.keys(mergedMcp).length > 0 ? mergedMcp : undefined,
+  }
+}