mine_changed_files

Instructions

Implementation Reference

• src/managers/CodeSearchManager.ts:51-81 (handler)

  The mineChangedFiles function that executes the core logic: gets committed and working-tree changed files via GitAccess, deduplicates, filters mineable paths via FileFilterEngine, and mines each file individually via MemPalaceAccess.mineFile.

  async function mineChangedFiles(
    repoDir: string,
  ): Promise<{ mined: string[]; skipped: string[] }> {
    // Combine committed changes (HEAD~1..HEAD) and uncommitted working-tree changes,
    // deduplicating by path so each file is only mined once.
    const [committedFiles, workingTreeFiles, gitRoot] = await Promise.all([
      git.getChangedFiles(repoDir),
      git.getWorkingTreeFiles(repoDir),
      git.getGitRoot(repoDir),
    ]);
    const seen = new Set<string>();
    const merged = [...committedFiles, ...workingTreeFiles].filter(({ path }) => {
      if (seen.has(path)) return false;
      seen.add(path);
      return true;
    });
    // git returns paths relative to the git toplevel (where .git lives), which may differ
    // from repoDir — use gitRoot to construct correct absolute paths.
    const allPaths = merged.map((f) => `${gitRoot}/${f.path}`);
    const mineable = fileFilter.filterPaths(allPaths);
    const skipped = allPaths.filter((p) => !mineable.includes(p));
  
    if (mineable.length > 0) {
      // Mine each changed file individually so we get targeted re-indexing
      for (const path of mineable) {
        await memPalace.mineFile(path, palaceWing);
      }
    }
  
    return { mined: mineable, skipped };
  }

• src/tools/code-search.tool.ts:11-11 (schema)

  Zod schema for mine_changed_files (empty object, no inputs needed).

  export const MineChangedFilesSchema = z.object({});

• src/tools/code-search.tool.ts:37-47 (registration)

  Registers the 'mine_changed_files' tool on the MCP server with its schema and handler that calls manager.mineChangedFiles(repoDir).

  server.tool('mine_changed_files', 'Re-index files changed since last commit into MemPalace. Call after making code changes to keep the search index current.', MineChangedFilesSchema.shape, async () => {
    const result = await manager.mineChangedFiles(repoDir);
    return {
      content: [
        {
          type: 'text' as const,
          text: JSON.stringify({ mined: result.mined, skipped: result.skipped }),
        },
      ],
    };
  });

• src/access/GitAccess.ts:52-55 (helper)

  GitAccess.getGitRoot returns the git top-level directory via 'git rev-parse --show-toplevel'.

  async function getGitRoot(repoDir: string): Promise<string> {
    const { stdout } = await execFileAsync('git', ['-C', repoDir, 'rev-parse', '--show-toplevel']);
    return stdout.trim();
  }

• src/access/GitAccess.ts:57-87 (helper)

  GitAccess.getChangedFiles returns files changed between HEAD~1 and HEAD via 'git diff --name-status'.

  async function getChangedFiles(repoDir: string, base?: string): Promise<ChangedFile[]> {
    const ref = base ?? 'HEAD~1';
    const { stdout } = await execFileAsync('git', [
      '-C',
      repoDir,
      'diff',
      '--name-status',
      ref,
      'HEAD',
    ]);
  
    return stdout
      .trim()
      .split('\n')
      .filter(Boolean)
      .map((line) => {
        const [rawStatus, ...parts] = line.split('\t');
        const path = parts[parts.length - 1] ?? '';
        const statusChar = (rawStatus ?? '')[0] ?? 'M';
        const statusMap: Record<string, ChangedFile['status']> = {
          A: 'added',
          M: 'modified',
          D: 'deleted',
          R: 'renamed',
        };
        return {
          path,
          status: statusMap[statusChar] ?? 'modified',
        };
      });
  }