Add AGENTS.md (#32)

Signed-off-by: Tamal Saha <tamal@appscode.com>

Author: tamalsaha

AGENTS.md

@@ -0,0 +1,40 @@
+# AGENTS.md
+
+This file provides guidance to coding agents (e.g. Claude Code, claude.ai/code) when working with code in this repository.
+
+## Repository purpose
+
+Go module `go.bytebuilders.dev/client` — the Go SDK for the [ByteBuilders](https://byte.builders) (b3) cloud platform API. Library only; consumed by ACE-side controllers, internal admin tools, and integration tests.
+
+Note: the GitHub repo is `bytebuilders/client-go`, but the Go module path is `go.bytebuilders.dev/client` (no `-go`). Use the module path in imports.
+
+## Architecture
+
+- Top-level Go files: `client.go` (`Client` constructor + HTTP plumbing), `auth.go` (auth helpers), `cluster.go` (cluster API), `ace_license.go` (license endpoints), plus matching `_test.go` files for each.
+- `api/` — generated request/response types for the b3 API.
+- `examples/` — usage samples.
+- `hack/` — codegen / linting helpers.
+- `doc.go` — package documentation.
+
+This is a **library**: no binaries, no Docker images.
+
+## Common commands
+
+- `make ci` — full CI pipeline.
+- `make fmt`, `make lint`, `make unit-tests` / `make test` — standard.
+- `make verify` — codegen + module-tidy verification.
+- `make add-license` / `make check-license` — manage license headers.
+
+Run a single Go test:
+
+```
+go test . -run TestName -v
+```
+
+## Conventions
+
+- Module path is `go.bytebuilders.dev/client` (vanity URL, **not** `client-go`); imports must use that.
+- License: see `LICENSE`. Sign off commits (`git commit -s`); contributions follow the DCO (`DCO`).
+- Every exported symbol is API — don't break downstream consumers (`b3`, ACE controllers) without coordinating.
+- `Client` methods follow the resource-noun + verb pattern; new resource families go in their own top-level file (`cluster.go`, `auth.go`, …) plus matching types under `api/`.
+- The README badges point at `byte.builders` — the consumer-facing product brand stays even if internal names drift.