import re

with open('CHANGELOG.md', 'r') as f:
    content = f.read()

new_entry = """## [1.22.0] — 2026-08-23

### Added
- **Audiobook Export Modal.** Introduced a comprehensive GUI for exporting audiobooks directly from the Rehearser.
- **Granular Export Controls.** Users can now select specific chapters to export, define the output format (one MP3 per chapter vs. single book file), and configure custom server-side save locations.
- **Pacing Configuration.** Added UI settings to adjust pacing with precise pause durations between paragraphs and chapters.
- **Tone Warning Integration.** Warnings for out-of-bounds tone settings are now displayed within the export modal for safety before batch generation.

### Fixed
- **UI Synchronization.** Fixed an issue where the Rehearser's green dots for cached audio lines would not synchronize reliably during navigation updates.
- **Bundle Stability.** Addressed a script hoisting issue in the production bundle that caused silent initialization failures and a "Loading..." stall.

"""

content = content.replace("---\n\n## [1.21.1]", "---\n\n" + new_entry + "## [1.21.1]")

with open('CHANGELOG.md', 'w') as f:
    f.write(content)