docs: guide agents to reuse installed CLI

[xu91102]

背景

Fixes #1543.

AI agents can repeatedly ask users to install lark-cli because the quick-start flow starts with installation and does not tell agents to detect an existing CLI first.

核心改动

• Update the English AI Agent quick start to check command -v lark-cli && lark-cli --version before installing.
• Add the same guidance to the Chinese README.
• Clarify that normal lark-cli usage does not require an MCP server; the CLI is a regular terminal command and Skills provide usage routing.

验证

• git diff --check: passed
• conflict marker scan: passed, no matches
• go test ./internal/qualitygate/rules -count=1: passed

风险与回滚

Docs-only change. Revert this commit to restore the previous quick-start wording.

Summary by CodeRabbit

• Documentation
  • Updated the AI Agent quick start steps to check whether lark-cli is already available before installing it.
  • Clarified that normal CLI use does not require additional MCP setup.
  • Added guidance on when and how bundled Skills can be used during installation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 0bc4b156-dc22-460e-8e45-cda2516414f7

📥 Commits

Reviewing files that changed from the base of the PR and between 74d8458 and 4b1326a.

📒 Files selected for processing (2)

• README.md
• README.zh.md

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📝 Walkthrough

Walkthrough

README.md and README.zh.md were updated to change the AI Agent Quick Start "Step 1" instructions from an unconditional install command to a conditional check that first detects whether lark-cli is already installed and runnable, only installing via npx if not found, plus clarifying text about MCP server not being required.

Changes

Quick Start Documentation Update

Layer / File(s)	Summary
Detect-or-install Step 1 instructions README.md, README.zh.md	Replaces unconditional npx @larksuite/cli@latest install instruction with conditional logic checking command -v lark-cli and lark-cli --version first, installing only if unavailable, and adds clarifying text that MCP server configuration is not required for normal CLI usage.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• larksuite/cli#464: Implements the same conditional "check for existing/runnable lark-cli before installing" logic in scripts/install-wizard.js, mirroring the behavior this PR documents in the README.

Suggested labels: documentation, size/S

Suggested reviewers: liangshuo-1, caojie0621

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately summarizes the docs change to reuse an installed CLI first.
Description check	✅ Passed	The description covers the motivation, main changes, verification, and linked issue, though it uses different headings than the template.
Linked Issues check	✅ Passed	The changes address #1543 by checking for an existing lark-cli first and clarifying that MCP is not required for normal use.
Out of Scope Changes check	✅ Passed	The PR stays within the documented CLI quick-start guidance and adds no unrelated code or scope.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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