feat(init): add support for kilocode and antigravity agents

[Yosoyepa]

Add support for generating rules for Kilo Code and Google Antigravity via rtk init.

Summary

• Added CLI Flags: Extended AgentTarget to support --agent kilocode and --agent antigravity.
• Injected Agent Rules: Created specific markdown instruction files matching the original token-loss guidelines for both assistants (.kilocode/rules/rtk-rules.md and .agent/rules/antigravity-rtk-rules.md).
• Maintained Code Style: Kept the new init::run console outputs consistent and free of emojis to strictly follow the project's formatting conventions.

Test plan

• cargo fmt --all && cargo clippy --all-targets && cargo test
• Manual testing: rtk <command> output inspected (Successfully tested rtk gain, rtk git status locally to ensure the new settings inject and reduce token usage without issues).

[CLAassistant]

All committers have signed the CLA.

[pszymkowiak]

[w] wshm · Automated triage by AI

📊 Automated PR Analysis

✨ Type	feature
🟢 Risk	low

Summary

Adds support for two new agent targets (Kilo Code and Google Antigravity) to the rtk init command. This includes new CLI flags, markdown rule files for each agent, and corresponding init mode functions that write rules to agent-specific directories.

Review Checklist

• Tests present
• Breaking change
• Docs updated

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Analyzed automatically by wshm · This is an automated analysis, not a human review.

[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

[Yosoyepa]

Hi @aeppling, thanks for the heads up!

I've successfully fetched the latest develop branch, rebased my branch, and resolved all conflicts to align with the new src/hooks/ subfolder structure. The rebase has been force-pushed and the new structure is perfectly integrated!

Let me know if everything looks good on your end or if there's anything else needed. Thanks!