git

import { type ChatMessage, type PromptPreprocessorController } from "@lmstudio/sdk";

const SYSTEM_RULES = `\
[System: Git Plugin]
• git_status — working tree state, staged/unstaged changes, branch info
• git_log — commit history with optional filters (author, date, file, message search)
• git_show — full diff and metadata for a specific commit
• git_diff — diff between refs, branches, or working tree (staged or unstaged)
• git_blame — line-by-line authorship for a file section
• git_branch — list all branches with last commit
• git_stash — list stashed changes
• git_file_history — all commits that touched a specific file

Always call git_status first to establish the current repo state.
When asked about recent changes, call git_log then git_show on relevant commits.
When asked "who wrote this" or "why was this changed", use git_blame + git_show.
On tool_error, read the error field and verify the repo_path or ref before retrying.`;

export async function promptPreprocessor(
  ctl: PromptPreprocessorController,
  userMessage: ChatMessage,
): Promise<string | ChatMessage> {
  const history = await ctl.pullHistory();
  if (history.length !== 0) return userMessage;
  return `${SYSTEM_RULES}\n\n${userMessage.getText()}`;
}