feat: native cross-platform hook for Windows support

[bz00qa]

Summary

• rtk hook-rewrite command: Native Claude Code PreToolUse hook that reads JSON from stdin, rewrites commands via the registry, and outputs hook response JSON — replaces the bash+jq dependency for cross-platform support
• Windows rtk init -g: Now registers native hook instead of falling back to --claude-md mode
• Windows rtk init -g --hook-only: Uses native hook instead of bailing with an error
• #[cfg(unix)] guards: Bash-only code paths (REWRITE_HOOK, prepare_hook_paths) properly gated
• Clippy fixes: Unnecessary borrows, dead code annotations in init.rs

Why

Windows users currently get a degraded experience — rtk init -g falls back to --claude-md mode because the bash hook (rtk-rewrite.sh) requires Unix. The native rtk hook-rewrite command eliminates the bash/jq dependency entirely, making the hook work on all platforms.

Changes

File	Description
src/hook_rewrite_cmd.rs	New native hook: parse stdin JSON, rewrite via registry, output hook response
src/main.rs	Add mod hook_rewrite_cmd, HookRewrite command variant + routing
src/init.rs	Windows default/hook-only modes use native hook, #[cfg(unix)] guards, clippy fixes

Test plan

• All 891 tests pass (1 pre-existing binlog CRLF failure)
• 4 new tests: hook JSON structure, field preservation, unsupported commands, already-rtk passthrough
• cargo fmt --all --check passes
• Manual: rtk init -g on Windows, verify settings.json gets rtk hook-rewrite entry
• Manual: pipe hook JSON to echo '{"tool_input":{"command":"git status"}}' | rtk hook-rewrite

🤖 Generated with Claude Code

[CLAassistant]

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[MarlonPassos-git]

@bz00qa please sign the CLA

[aeppling]

Hey

We are cleaning up the codebase and improving the project structure for better onboarding. As part of this effort, PR #826 reorganizes src/ from a flat layout into subfolders.

No logic changes — only file moves and import path updates.

What you need to do

Rebase your branch on develop when receiving this comment:

git fetch origin && git rebase origin/develop

Git detects renames automatically. If you get import conflicts, update the paths:

use crate::git;        // now: use crate::cmds::git::git;
use crate::tracking;   // now: use crate::core::tracking;
use crate::config;     // now: use crate::core::config;
use crate::init;       // now: use crate::hooks::init;
use crate::gain;       // now: use crate::analytics::gain;

Need help rebasing? Tag @aeppling

[aeppling]

Thanks for contributing @bz00qa — the early native cross-platform hook approach helped shape the direction.

This is now superseded by the v0.37.x releases: master ships a full native binary hook system (rtk hook claude) with proper JSON-based detection. Closing as resolved.