Grep tool count output_mode shows incorrect summary

Description

When using the Grep tool with output_mode: "count", the tool correctly counts matches but the summary line incorrectly reports "Found 0 total occurrences across 0 files."

Reproduction Steps

1. Have a file with known content (e.g., a markdown file with "Not Implemented" appearing 21 times)
2. Use Grep with output_mode: "count":

Grep pattern="Not Implemented" path="/path/to/file.md" output_mode="count"

1. Observe output:

21

Found 0 total occurrences across 0 files.

Expected Behavior

The summary should match the actual count:

21

Found 21 total occurrences across 1 file.

Actual Behavior

• First line shows correct count: 21
• Summary line incorrectly shows: Found 0 total occurrences across 0 files.

Additional Context

• output_mode: "content" works correctly
• output_mode: "files_with_matches" works correctly
• Only output_mode: "count" has the inconsistent summary

Environment

• Claude Code CLI
• Model: claude-opus-4-5-20251101