Agent Breaking Changes_

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Aider Aider v0.77.0

2025-03-13 · official notes

Summary

• Big upgrade in programming languages supported by adopting tree-sitter-language-pack.
• new languages with linter support.
• new languages with repo-map support.

Full notes

- Big upgrade in [programming languages supported](https://aider.chat/docs/languages.html) by adopting [tree-sitter-language-pack](https://github.com/Goldziher/tree-sitter-language-pack/).
  - 130 new languages with linter support.
  - 20 new languages with repo-map support.
- Added `/think-tokens` command to set thinking token budget with support for human-readable formats (8k, 10.5k, 0.5M).
- Added `/reasoning-effort` command to control model reasoning level.
- The `/think-tokens` and `/reasoning-effort` commands display current settings when called without arguments.
- Display of thinking token budget and reasoning effort in model information.
- Changed `--thinking-tokens` argument to accept string values with human-readable formats.
- Added `--auto-accept-architect` flag (default: true) to automatically accept changes from architect coder format without confirmation.
- Added support for `cohere_chat/command-a-03-2025` and `gemini/gemma-3-27b-it`
- The bare `/drop` command now preserves original read-only files provided via args.read.
- Fixed a bug where default model would be set by deprecated `--shortcut` switches even when already specified in the command line.
- Improved AutoCompleter to require 3 characters for autocompletion to reduce noise.
- Fixed handling of JSONDecodeError when loading model cache file.
- Fixed handling of GitCommandError when retrieving git user configuration.
- Added ignore_permission_denied option to file watcher to prevent errors when accessing restricted files, by Yutaka Matsubara.

- Aider wrote 72% of the code in this release.