diff --git a/cli/planoai/defaults.py b/cli/planoai/defaults.py
index 03b113d0..7d5915e3 100644
--- a/cli/planoai/defaults.py
+++ b/cli/planoai/defaults.py
@@ -72,14 +72,13 @@ PROVIDER_DEFAULTS: list[ProviderDefault] = [
         base_url="https://api.mistral.ai/v1",
         model_pattern="mistral/*",
     ),
-    # DigitalOcean Gradient is OpenAI-compatible and `do` is not in the built-in
-    # SUPPORTED_PROVIDERS list, so we must provide provider_interface explicitly.
+    # DigitalOcean Gradient is now a first-class provider (see #889) — model
+    # prefix `digitalocean/` routes to the built-in cluster, no base_url needed.
     ProviderDefault(
-        name="do",
+        name="digitalocean",
         env_var="DO_API_KEY",
         base_url="https://inference.do-ai.run/v1",
-        model_pattern="do/*",
-        provider_interface="openai",
+        model_pattern="digitalocean/*",
     ),
 ]
 
diff --git a/cli/test/test_defaults.py b/cli/test/test_defaults.py
index 69d5dcfa..3d40e65d 100644
--- a/cli/test/test_defaults.py
+++ b/cli/test/test_defaults.py
@@ -25,7 +25,7 @@ def test_zero_env_vars_produces_pure_passthrough():
         assert "access_key" not in provider
     # All known providers should be listed.
     names = {p["name"] for p in cfg["model_providers"]}
-    assert "do" in names
+    assert "digitalocean" in names
     assert "openai" in names
     assert "anthropic" in names
 
@@ -37,7 +37,7 @@ def test_env_keys_promote_providers_to_env_keyed():
     by_name = {p["name"]: p for p in cfg["model_providers"]}
     assert by_name["openai"].get("access_key") == "$OPENAI_API_KEY"
     assert by_name["openai"].get("passthrough_auth") is None
-    assert by_name["do"].get("access_key") == "$DO_API_KEY"
+    assert by_name["digitalocean"].get("access_key") == "$DO_API_KEY"
     # Unset env keys remain pass-through.
     assert by_name["anthropic"].get("passthrough_auth") is True
 
@@ -45,7 +45,7 @@ def test_env_keys_promote_providers_to_env_keyed():
 def test_detection_summary_strings():
     det = detect_providers(env={"OPENAI_API_KEY": "sk", "DO_API_KEY": "d"})
     summary = det.summary
-    assert "env-keyed" in summary and "openai" in summary and "do" in summary
+    assert "env-keyed" in summary and "openai" in summary and "digitalocean" in summary
     assert "pass-through" in summary
 
 
@@ -62,9 +62,9 @@ def test_synthesized_config_validates_against_schema():
     jsonschema.validate(cfg, _schema())
 
 
-def test_provider_defaults_do_is_configured():
+def test_provider_defaults_digitalocean_is_configured():
     by_name = {p.name: p for p in PROVIDER_DEFAULTS}
-    assert "do" in by_name
-    assert by_name["do"].env_var == "DO_API_KEY"
-    assert by_name["do"].base_url == "https://inference.do-ai.run/v1"
-    assert by_name["do"].model_pattern == "do/*"
+    assert "digitalocean" in by_name
+    assert by_name["digitalocean"].env_var == "DO_API_KEY"
+    assert by_name["digitalocean"].base_url == "https://inference.do-ai.run/v1"
+    assert by_name["digitalocean"].model_pattern == "digitalocean/*"