1import { Type } from "@sinclair/typebox";
 2import type { AgentTool } from "@mariozechner/pi-ai";
 3import simpleGit from "simple-git";
 4import { ToolInputError } from "../../../util/errors.js";
 5
 6const LogSchema = Type.Object({
 7  path: Type.Optional(Type.String({ description: "Filter to commits touching this path" })),
 8  author: Type.Optional(Type.String({ description: "Filter by author name/email" })),
 9  since: Type.Optional(Type.String({ description: "Commits after this date (e.g., 2024-01-01)" })),
10  until: Type.Optional(Type.String({ description: "Commits before this date" })),
11  n: Type.Optional(Type.Number({ description: "Maximum number of commits (default: 20)" })),
12  oneline: Type.Optional(Type.Boolean({ description: "Compact one-line format (default: false)" })),
13});
14
15export const createGitLogTool = (workspacePath: string): AgentTool => ({
16  name: "git_log",
17  label: "Git Log",
18  description: "View commit history. Supports filtering by path, author, date range, and count.",
19  parameters: LogSchema as any,
20  execute: async (_toolCallId: string, params: any) => {
21    const git = simpleGit(workspacePath);
22    const options: string[] = [];
23
24    if (params.n !== undefined) {
25      if (typeof params.n !== "number" || Number.isNaN(params.n) || params.n <= 0) {
26        throw new ToolInputError("n must be a positive number");
27      }
28      options.push("-n", String(Math.floor(params.n)));
29    }
30    if (params.oneline) options.push("--oneline");
31    if (params.author && !String(params.author).trim()) {
32      throw new ToolInputError("author must be a non-empty string");
33    }
34    if (params.author) options.push(`--author=${params.author}`);
35    if (params.since && !String(params.since).trim()) {
36      throw new ToolInputError("since must be a non-empty string");
37    }
38    if (params.since) options.push(`--since=${params.since}`);
39    if (params.until && !String(params.until).trim()) {
40      throw new ToolInputError("until must be a non-empty string");
41    }
42    if (params.until) options.push(`--until=${params.until}`);
43
44    const result = await git.log(options.concat(params.path ? ["--", params.path] : []));
45
46    const text = result.all
47      .map((entry) =>
48        params.oneline
49          ? `${entry.hash} ${entry.message}`
50          : `${entry.hash} ${entry.date} ${entry.author_name} ${entry.message}`,
51      )
52      .join("\n");
53
54    return {
55      content: [{ type: "text", text }],
56      details: { count: result.all.length },
57    };
58  },
59});