Aider vs JulesComparisonUpdated 2026-03-16
SUMMARY
Aider (CLI) uses markdown configuration while Jules (Agent) uses markdown. They differ on 4 of 11 compared features. Both tools provide AI-assisted development but take different approaches to project configuration.
FEATURE COMPARISON
| Feature | Aider | Jules |
|---|---|---|
| Config format | markdown | markdown |
| Hierarchy support | ✗ | ✓ |
| Global config | ✓ | ✗ |
| Project config | ✓ | ✓ |
| Subdirectory scoping | ✓ | ✓ |
| File inclusion / imports | ✗ | ✗ |
| Ignore file | .aiderignore | ✗ |
| IDE integration | CLI | Agent |
| Schema / structure | Free-form (Markdown) | Free-form (Markdown) |
| Git committed | ✓ | ✓ |
| Encoding | UTF-8 | UTF-8 |
FILE MAPPING
| Purpose | Aider | Jules |
|---|---|---|
| Settings / configuration | .aider.conf.yml | .gemini/settings.json |
| Project instructions | CONVENTIONS.md | AGENTS.md |
SIDE-BY-SIDE CODE SAMPLES
Aider
CONVENTIONS.md
markdown
# Project Conventions
## Language
- TypeScript strict mode, no `any` types
- Prefer const over let, never use var
- Use template literals over string concatenation
## Architecture
- Feature-based folder structure under src/features/
- Each feature exports through an index.ts barrel file
- Shared utilities go in src/lib/
## Error Handling
- Use Result<T, E> pattern for expected failures
- Throw only for programmer errors
- Always log errors with structured context
## Testing
- Colocate tests next to source files (*.test.ts)
- Use factories for test data, not fixtures
- Integration tests in __tests__/ directories
Jules
AGENTS.md
markdown
# Agent Instructions
## Project
A Django REST API serving a React frontend.
## Setup
- Python 3.12 with Poetry
- PostgreSQL 15
- Redis for caching and Celery broker
## Key Commands
- poetry run python manage.py runserver
- poetry run pytest
- poetry run mypy .
## Pull Request Guidelines
- Keep PRs focused on a single issue
- Add tests for all new functionality
- Update API docs in docs/api/ if endpoints change
- Run the linter: poetry run ruff check .
## Architecture Notes
- apps/core/ — shared models and utilities
- apps/api/v2/ — current API version
- apps/tasks/ — Celery background tasks
KEY DIFFERENCES
Aider: Not supported. Jules: Supported.
Aider: Supported. Jules: Not supported.
Aider: .aiderignore. Jules: Not supported.
Aider: CLI. Jules: Agent.
WHICH SHOULD I USE?
Choose based on your IDE/CLI preference. If you use Aider, configure .aider.conf.yml. If you use Jules, configure AGENTS.md. Many projects include config files for multiple tools so each team member can use their preferred editor.
PORTABILITY TIP
sync-instructions.sh
bash
# Maintain a single source of truth:
cp AI-INSTRUCTIONS.md CLAUDE.md
cp AI-INSTRUCTIONS.md .cursorrules
cp AI-INSTRUCTIONS.md AGENTS.md
SEE ALSO
File references:
agentconfig.ing2026-03-16COMPARE(1)