feat(cli): add native agent hook installer

[aidenybai]

Summary

• Add react-doctor install --agent-hooks for project-level Claude Code and Cursor hooks that surface React Doctor findings after agent edits.
• Keep the existing skill install flow and non-blocking Git pre-commit hook support, with docs covering agent hooks and CI setup.
• Add focused installer tests for CLI option forwarding, hook config merging, executable scripts, and Git hook installation.

Test plan

• nr test -- tests/install-agent-hooks.test.ts tests/install-skill.test.ts tests/install-action.test.ts
• nr typecheck
• nr lint

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Note

Medium Risk
Adds file-writing installers for Git hooks and agent hook configs/scripts, which can affect developer workflows if paths/merging logic misbehaves. Changes are localized to the install command and are covered by new integration-style tests.

Overview
Extends react-doctor install with an --agent-hooks option that installs native, non-blocking post-edit hooks for Claude Code and Cursor, generating a react-doctor runner script and updating each agent’s hook config without duplicating entries.

Adds an optional dependency-free Git pre-commit hook installer: detects the correct hook location (including core.hooksPath), writes a managed .react-doctor/hooks/pre-commit runner that scans staged files with --fail-on none, and merges/updates a managed block into an existing hook while preserving user content.

Updates README/CLI help and expands test coverage to validate option forwarding, hook config merging, executable permissions, Git target detection, and real git commit behavior.

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[reactreview]

✅ No new issues

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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