1import { Type } from "@sinclair/typebox";
 2import type { AgentTool } from "@mariozechner/pi-ai";
 3import simpleGit from "simple-git";
 4import { ToolInputError } from "../../../util/errors.js";
 5import { formatSize, truncateHead } from "../../../util/truncate.js";
 6
 7const ShowSchema = Type.Object({
 8  ref: Type.String({ description: "Commit hash or ref" }),
 9});
10
11export const createGitShowTool = (workspacePath: string): AgentTool => ({
12  name: "git_show",
13  label: "Git Show",
14  description: "Show details for a commit or object.",
15  parameters: ShowSchema as any,
16  execute: async (_toolCallId: string, params: any) => {
17    if (!String(params.ref ?? "").trim()) {
18      throw new ToolInputError("ref must be a non-empty string");
19    }
20    const git = simpleGit(workspacePath);
21    const raw = await git.show([params.ref]);
22    const truncation = truncateHead(raw);
23
24    let text = truncation.content;
25    if (truncation.truncated) {
26      text += `\n\n[truncated: showing ${truncation.outputLines} of ${truncation.totalLines} lines (${formatSize(truncation.outputBytes)} of ${formatSize(truncation.totalBytes)})]`;
27    }
28
29    return {
30      content: [{ type: "text", text }],
31      details: { ref: params.ref, ...(truncation.truncated ? { truncation } : {}) },
32    };
33  },
34});