# AGENTS.md — Rules for AI Agents

## Before Every Commit

1. **Format**: `gofmt -s -w .` and `goimports -w .`
2. **Lint**: `golangci-lint run --config .golangci.yml ./...` — zero issues
3. **Test**: `go test -race ./...` — all passing
4. **Build**: `go build ./cmd/chatd` — compiles clean

No commit lands on main with lint errors, test failures, or formatting issues.

## Code Style

- Follow CONVENTIONS.md exactly — it defines the architecture
- All exported types, functions, methods, and vars must have doc comments
- All packages must have a package doc comment
- JSON tags use camelCase (not snake_case)
- No magic numbers — use named constants
- No inline error handling (`if err := ...; err != nil`) — use plain assignment
- Blank line before every `return` statement
- Blank line separating embedded fields from regular fields in structs
- Blank imports must have a justification comment

## Git Workflow

- **Never commit directly to main** — all changes go on feature branches
- Merge to main only when ready and passing all checks
- PR titles: `Description (closes #N)` when closing an issue
- One logical change per commit
- Commit messages: imperative mood, concise

## Architecture

- Dependency injection via Uber fx — all components are fx providers
- `internal/` for all application packages — one package per concern
- Handlers return `http.HandlerFunc` using the closure pattern
- Request/response structs defined inside handler closures
- Models embed `models.Base` for database access to relation methods
- Database migrations in `internal/db/schema/` — embedded via `go:embed`
- SQLite by default (pure Go driver: modernc.org/sqlite)

## Testing

- Table-driven tests preferred
- Use `testing.T` helpers, not assertion libraries
- Test files live next to the code they test
- `_test.go` suffix, same package for white-box testing

## Dependencies

- Required libraries are listed in CONVENTIONS.md §1
- No new dependencies without justification
- Pure Go preferred (no CGO)