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build-cli-plugin

build-cli-plugin

Build a plugin or adapter for a CLI tool using the abstract base class pattern. Covers defining the contract (static fields, required methods), choosing an installation strategy (symlink, copy, append-to-file), implementing detection, install/uninstall with idempotency, listing, auditing, and registering the plugin. Use when adding support for a new framewo…

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Documentation de la Skill

GitHub

name: build-cli-plugin locale: wenyan source_locale: en source_commit: 82c77053 fence_basis_commit: 82c77053 translator: "Julius Brussee homage — caveman" translation_date: "2026-04-19" description: > Build a plugin or adapter for a CLI tool using the abstract base class pattern. Covers defining the contract (static fields, required methods), choosing an installation strategy (symlink, copy, append-to-file), implementing detection, install/uninstall with idempotency, listing, auditing, and registering the plugin. Use when adding support for a new framework to a CLI installer, building a plugin system for any multi-target tool, or extending an existing adapter architecture. license: MIT allowed-tools: Read Write Edit Bash Grep Glob metadata: author: Philipp Thoss version: "1.0" domain: cli complexity: intermediate language: TypeScript tags: - cli - plugin - adapter - architecture - nodejs

建 CLI 之插件

以抽象基類之式加新插件或適配於 CLI 工具之可插架。

用時

  • 加新標框架於 CLI 裝器
  • 為多標之命行工具建插件系
  • 擴現有適配架以新策之變
  • 移內容之交於用異檔佈之框架

入

  • 必要:插件所支之框架或標(名、設路、規)
  • 必要:基類或插件契之路
  • 必要:裝略:symlink、copy、file-per-item、或 append-to-file
  • 可選:插件所理之內容類(如只技、技加人、全支)
  • 可選:範支(項目級、全局、二者)

法

第一步:定契

基類立諸插件必施之介:

export class FrameworkAdapter {
  static id = 'base';            // Unique identifier
  static displayName = 'Base';   // Human-readable name
  static strategy = 'symlink';   // Installation strategy
  static contentTypes = ['skill']; // What this adapter handles

  async detect(projectDir) { return false; }
  getTargetPath(projectDir, scope) { throw new Error('Not implemented'); }
  async install(item, projectDir, scope, options) { throw new Error('Not implemented'); }
  async uninstall(item, projectDir, scope, options) { throw new Error('Not implemented'); }
  async listInstalled(projectDir, scope) { return []; }
  async audit(projectDir, scope) { return { framework: this.constructor.displayName, ok: [], warnings: [], errors: [] }; }
  supports(contentType) { return this.constructor.contentTypes.includes(contentType); }
}

靜態欄定插件之身與能:

  • id:用於 --framework <id> 選與果報
  • displayName:人讀之輸出所見
  • strategy:定內容達標之法
  • contentTypes:篩此適配所收之項

若基類未建,先建之。此式可擴至任數之插件。

得: 基類備,含靜身欄與抽象法。

敗則: 若基類有法不適諸插件(如諸框架未皆支 audit),供默實為合理之無作。

第二步:擇裝略

StrategyWhen to useExample
symlinkTarget reads source files directly. Cheapest, stays in sync.Claude Code reads .claude/skills/<name>/ symlinks
copyTarget needs files in its own directory. Modifications don't propagate.Some IDEs index only their own dirs
file-per-itemTarget expects one file per item with specific format.Cursor .mdc rules files
append-to-fileTarget reads a single instructions file.Aider CONVENTIONS.md, Codex AGENTS.md

略決施之形:

  • Symlink:symlinkSync(source, target) — 理相對與絕對之路
  • Copy:cpSync(source, target, { recursive: true }) — 理覆寫
  • File-per-item:writeFileSync(target, transform(content)) — 或須格式轉
  • Append-to-file:以標裹內容以冪等插/換/刪

得: 已擇略,附清由,據標框架如何察內容。

敗則: 若不定,察框架之文如何察設或指檔。若框架讀任目,默為 symlink。

第三步:施察

察告 CLI 項目中何框架存:

// In detector.js — each rule checks for a filesystem marker
const RULES = [
  {
    id: 'my-framework',
    displayName: 'My Framework',
    check: (dir) => existsSync(resolve(dir, '.myframework/')),
    marker: '.myframework/',
    scope: 'project',
  },
];

察之略:

  • 目存:.claude/、.cursor/、.gemini/
  • 設檔:opencode.json、.aider.conf.yml
  • 指檔:AGENTS.md、CONVENTIONS.md
  • 全局標:~/.openclaw/、~/.hermes/

恆於察果中返標,令用者知框架何以被察。

得: 察律穩識框架而無誤報。

敗則: 若框架無獨標(泛目名),合諸標用之,或須明之 --framework 指。

第四步:施裝,帶冪等

async install(item, projectDir, scope, options) {
  const targetDir = this.getTargetPath(projectDir, scope);
  const targetPath = resolve(targetDir, item.id);

  // Idempotency: skip if already installed (unless force)
  if (existsSync(targetPath) && !options.force) {
    return { action: 'skipped', path: targetPath };
  }

  if (options.dryRun) {
    return { action: 'created', path: targetPath, details: 'dry-run' };
  }

  // Ensure parent directory exists
  mkdirSync(targetDir, { recursive: true });

  // Strategy-specific installation
  if (this.constructor.strategy === 'symlink') {
    const relPath = relative(targetDir, item.sourceDir);
    symlinkSync(relPath, targetPath);
  } else if (this.constructor.strategy === 'copy') {
    cpSync(item.sourceDir, targetPath, { recursive: true });
  }

  return { action: 'created', path: targetPath };
}

冪等之律:

  • 標存且未 --force:略
  • 設 --force:覆(先刪而後裝)
  • 乾行:恆成功,返 action: 'created'
  • 返值:恆為 { action, path, details? }

得: 裝於標路建內容,若存則略,敬 --force 與 --dry-run。

敗則: Windows/NTFS 上 symlink 建敗者,降為目 junction 或 copy。記降級。

第五步:施卸,帶清

async uninstall(item, projectDir, scope, options) {
  const targetDir = this.getTargetPath(projectDir, scope);
  const targetPath = resolve(targetDir, item.id);

  if (!existsSync(targetPath)) {
    return { action: 'skipped', path: targetPath };
  }

  if (options.dryRun) {
    return { action: 'removed', path: targetPath };
  }

  // Remove the installed content
  rmSync(targetPath, { recursive: true });

  return { action: 'removed', path: targetPath };
}

清之考:

  • 只刪插件所裝者——勿刪用者所作之檔
  • append-to-file:刪標區,非全檔
  • 留父目(他插件或用之)

得: 卸只刪插件之內容,他無損。

敗則: 若刪敗(權、鎖),返錯果而非拋。

第六步:施列與察

async listInstalled(projectDir, scope) {
  const targetDir = this.getTargetPath(projectDir, scope);
  if (!existsSync(targetDir)) return [];

  const entries = readdirSync(targetDir);
  return entries.map(name => {
    const fullPath = resolve(targetDir, name);
    const broken = lstatSync(fullPath).isSymbolicLink()
      && !existsSync(fullPath);
    return { id: name, type: 'skill', broken };
  });
}

async audit(projectDir, scope) {
  const items = await this.listInstalled(projectDir, scope);
  const ok = items.filter(i => !i.broken);
  const broken = items.filter(i => i.broken);
  return {
    framework: this.constructor.displayName,
    ok: [`${ok.length} skills installed`],
    warnings: [],
    errors: broken.map(i => `Broken: ${i.id}`),
  };
}

得: 列返諸裝項,含斷鏈之察。察總其康。

敗則: 若標目不存,返空果(非錯——乃框架未裝)。

第七步:註插件

// In adapters/index.js
import { MyFrameworkAdapter } from './my-framework.js';
register(MyFrameworkAdapter);

註令適配可用於:

  • 自動察(detectFrameworks() → getAdaptersForDetections())
  • 明擇(--framework my-framework)
  • 列(listAdapters())

得: 適配見於 tool detect 之輸出,可以 --framework 指之。

敗則: 若適配不現,驗 static id 合察律之 id 且 register() 已呼。

第八步:書測

describe('adapter: my-framework (dry-run)', () => {
  it('targets the correct path', () => {
    const out = run('install create-skill --framework my-framework --dry-run');
    assert.match(out, /\.myframework/i);
  });
});

至少測:乾行之路、察之存、內容類之支。

得: 適配特測證裝之路與行。

敗則: CI 中無標目而框架不察者,測中明用 --framework。

驗

  • 插件正擴基類
  • 靜欄(id、displayName、strategy、contentTypes)已設
  • 察律識框架而無誤報
  • install() 冪等(若存則略,敬 --force)
  • uninstall() 只刪插件所建者
  • listInstalled() 察斷 symlink
  • audit() 準報康
  • 插件已註,現於 tool detect
  • 乾行測過

陷

  • 忘相對與絕對 symlink:項目範之 symlink 宜相對(可攜)。全範之 symlink 宜絕對(不依 cwd)
  • 未理缺父目:恆 mkdirSync(dir, { recursive: true }) 於建內容前
  • append-to-file 無標:無冪等標(<!-- start:id --> / <!-- end:id -->),反覆裝重內容。恆以標裹附之內容
  • 察誤報:泛目名(如 .config/)或合多框架。用目內之特檔標
  • 忘 supports() 察:裝器於派前呼 supports(item.type)。若 contentTypes 誤,適配默略項

參

  • scaffold-cli-command — 建用此插件之 CLI 命
  • test-cli-application — CLI 工具之測模式,含適配測
  • design-cli-output — 裝卸果之終端輸出
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