feat: Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -7,61 +7,7 @@ Thank you for your interest in contributing to Plotnik.
 By contributing to this project, you agree that your contributions will be licensed under the [Apache License 2.0](LICENSE).
 
 This means:
+
 - You grant a perpetual, worldwide, royalty-free patent license to all users
 - Your code can be used in commercial products without restriction
 - You retain copyright to your contributions
-
-## Before Contributing
-
-Read [`AGENTS.md`](AGENTS.md) — it's our constitution and contains:
-- Project ethos and design principles
-- Architecture Decision Records (ADRs)
-- Code and testing conventions
-- Project structure overview
-
-## Code Conventions
-
-### Style
-- Early returns over nested logic
-- Comments explain "why," not "what"
-- Code is written for senior engineers, not juniors
-
-### Testing
-- Tests live in `foo_tests.rs`, included via `#[cfg(test)] mod foo_tests;`
-- Use `insta` for snapshot testing
-- AAA pattern (Arrange-Act-Assert) separated by blank lines
-- Never write snapshots manually — use `@""` and `cargo insta accept`
-
-### Running Tests
-```sh
-make test              # Run all tests
-make snapshots         # Accept snapshot changes
-make coverage-lines    # Check coverage per file
-```
-
-### CLI Testing
-The `debug` command is your first testing tool:
-```sh
-cargo run -p plotnik-cli -- debug -q '(identifier) @id'
-cargo run -p plotnik-cli -- debug -q 'YourQuery' --only-symbols
-```
-
-## Submitting Changes
-
-1. **Fork and branch** — Create a feature branch from `main`
-2. **Write tests** — New features need tests, bug fixes need regression tests
-3. **Run checks** — Ensure `make test` passes
-4. **Keep commits atomic** — One logical change per commit
-5. **Write clear commit messages** — Explain the "why" behind the change
-6. **Submit a PR** — Reference any related issues
-
-## Architecture Changes
-
-If your contribution involves a significant architectural decision:
-- Create an ADR (Architecture Decision Record) in `docs/adr/`
-- Follow the template in `AGENTS.md`
-- Number it sequentially: `ADR-XXXX-short-title.md`
-
-## Questions?
-
-Open an issue for discussion before starting major work. We prefer to align on approach before you invest significant time.