feat(exec): export xAI executor

[awsl233777]

Summary

• expose the internal xAI/Grok executor through sdk/exec
• keep token refresh and request execution in the existing internal executor

Validation

• go test ./sdk/exec ./sdk/cliproxy/auth ./sdk/cliproxy/executor

Summary by CodeRabbit

• 新功能
  • 新增 xAI/Grok 执行器，可通过公开接口创建和使用。
  • 执行器支持基于鉴权信息自动管理访问令牌刷新。

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 77eec624-7c8d-4c53-bf1a-8b1929b23878

📥 Commits

Reviewing files that changed from the base of the PR and between ca6f1ac and 27dae34.

📒 Files selected for processing (1)

• sdk/exec/xai.go

📜 Recent review details

⚠️ CI failures not shown inline (2)

GitHub Actions: auto-retarget-main-pr-to-dev / 0_retarget.txt: feat(exec): export xAI executor

Conclusion: failure

View job details

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 ##[endgroup]
 Retargeting PR `#10` base from main to dev.
 ##[error]Failed to retarget PR `#10` to dev: Validation Failed: {"message":"Proposed base branch 'dev' was not found","resource":"PullRequest","field":"base","code":"invalid"}

---

GitHub Actions: auto-retarget-main-pr-to-dev / retarget: feat(exec): export xAI executor

Conclusion: failure

View job details

##[group]Run actions/github-script@v7
 with:
   script: const pr = context.payload.pull_request;
const prNumber = pr.number;
const { owner, repo } = context.repo;
const baseRef = pr.base?.ref;
const headRef = pr.head?.ref;
const desiredBase = "dev";
if (baseRef !== "main") {
  core.info(`PR #${prNumber} base is ${baseRef}; nothing to do.`);
  return;
}
if (headRef === desiredBase) {
  core.info(`PR #${prNumber} is ${desiredBase} -> main; skipping retarget.`);
  return;
}
core.info(`Retargeting PR #${prNumber} base from ${baseRef} to ${desiredBase}.`);
try {
  await github.rest.pulls.update({
    owner,
    repo,
    pull_number: prNumber,
    base: desiredBase,
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} catch (error) {
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   debug: false
   user-agent: actions/github-script
   result-encoding: json
   retries: 0
   retry-exempt-status-codes: 400,401,403,404,422
 ##[endgroup]
 Retargeting PR `#10` base from main to dev.
 ##[error]Failed to retarget PR `#10` to dev: Validation Failed: {"message":"Proposed base branch 'dev' was not found","resource":"PullRequest","field":"base","code":"invalid"}

🧰 Additional context used

📓 Path-based instructions (1)

**/*.go

📄 CodeRabbit inference engine (AGENTS.md)

**/*.go: Format code with gofmt after Go changes
Run compile verification with go build -o test-output ./cmd/server && rm test-output after changes (REQUIRED)
Use English only for code comments
If editing code with non-English comments, translate them to English (do not add new non-English comments)
Follow gofmt formatting and use goimports-style imports
Wrap errors with context where helpful
Do not use log.Fatal or log.Fatalf (terminates the process); prefer returning errors and logging via logrus
Use method suffix for shadowed variables (e.g., errStart := server.Start())
Wrap defer errors with proper error handling: defer func() { if err := f.Close(); err != nil { log.Errorf(...) } }()
Use logrus structured logging; avoid leaking secrets/tokens in logs

Files:

• sdk/exec/xai.go

🔇 Additional comments (3)

sdk/exec/xai.go (3)

1-10: LGTM!

---

16-17: 📐 Maintainability & Code Quality

无需补充编译检查

---

12-17: 🎯 Functional Correctness

这条不成立： ExecuteStream 和 CountTokens 的参数/返回值都使用 sdk/cliproxy/auth、sdk/cliproxy/executor 里的公开类型，外部 SDK 调用方可以直接使用 sdk/exec.NewXAIExecutor()。

			> Likely an incorrect or invalid review comment.

---

📝 Walkthrough

Walkthrough

新增 sdk/exec/xai.go，将内部 xAI/Grok 执行器导出为 SDK 类型，并提供使用空配置初始化实例的构造函数。

Changes

xAI 执行器导出

Layer / File(s)	Summary
执行器封装与构造函数 sdk/exec/xai.go	新增 XAIExecutor 类型别名和 NewXAIExecutor() 构造函数，用于创建内部 xAI/Grok 执行器。

Estimated code review effort: 1 (Trivial) | ~2 minutes

Poem

我是小兔，蹦过代码田，
xAI 执行器亮相 API 边。
别名轻轻搭桥梁，
构造函数捧来新实例，
耳朵一竖，发布完成！

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	标题简洁明确，准确概括了本次新增并导出 xAI 执行器的主要变更。
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/export-xai-executor

⚔️ Resolve merge conflicts

• Resolve merge conflict in branch feat/export-xai-executor

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