Add go style rules in contrib/claude

Signed-off-by: Émile Ré <emile@getprobo.com>

AGENTS.md

@@ -31,6 +31,7 @@ Detailed guides for specific subsystems live in `contrib/claude/`:
 - [`contrib/claude/coredata.md`](contrib/claude/coredata.md) — Data access layer (Scoper, SQL patterns, filters, order fields, migrations)
 - [`contrib/claude/e2e.md`](contrib/claude/e2e.md) — End-to-end testing (factory builders, RBAC tests, tenant isolation, assertions)
 - [`contrib/claude/go-service.md`](contrib/claude/go-service.md) — Go service orchestration (Run, graceful shutdown, crash propagation)
+- [`contrib/claude/go-style.md`](contrib/claude/go-style.md) — Call expressions, multiline argument lists, layout conventions
 - [`contrib/claude/go-testing.md`](contrib/claude/go-testing.md) — Go test conventions (parallel, require vs assert, naming)
 - [`contrib/claude/go-worker.md`](contrib/claude/go-worker.md) — Go worker pattern (poll-based, bounded concurrency, FOR UPDATE SKIP LOCKED)
 - [`contrib/claude/graphql.md`](contrib/claude/graphql.md) — Go GraphQL backend (gqlgen, @goModel, connection types, cursor pagination)