feat(providers): Add Freebuff as a provider

.env.example

@@ -85,6 +85,14 @@
 # Path to your iFlow credential file (e.g., ~/.iflow/oauth_creds.json).
 #IFLOW_OAUTH_1=""
 
+# --- Freebuff ---
+# Freebuff auth tokens (comma-separated for multi-token rotation).
+# Obtain from ~/.config/manicode/credentials.json (authToken field) or https://freebuff.llm.pm
+#FREEBUFF_API_KEY_1=""
+#FREEBUFF_API_KEY_2=""
+#FREEBUFF_API_BASE="https://codebuff.com"
+#FREEBUFF_MODELS='["z-ai/glm-5.1","minimax/minimax-m2.7","google/gemini-2.5-flash-lite","google/gemini-3.1-flash-lite-preview"]'
+
 
 # ------------------------------------------------------------------------------
 # | [ADVANCED] Provider-Specific Settings                                      |

src/rotator_library/provider_config.py

@@ -106,6 +106,13 @@
     "synthetic": {
         "category": "popular",
     },
+    "freebuff": {
+        "category": "popular",
+        "note": "Free AI model hosting. Auth token from Freebuff CLI (~/.config/manicode/credentials.json).",
+        "extra_vars": [
+            ("FREEBUFF_API_BASE", "API Base URL (optional)", "https://codebuff.com"),
+        ],
+    },
     # =========================================================================
     # CLOUD PLATFORMS - Aggregators & cloud inference platforms
     # =========================================================================

src/rotator_library/provider_factory.py

@@ -7,12 +7,14 @@
 from .providers.qwen_auth_base import QwenAuthBase
 from .providers.iflow_auth_base import IFlowAuthBase
 from .providers.antigravity_auth_base import AntigravityAuthBase
+from .providers.freebuff_auth_base import FreebuffAuthBase
 
 PROVIDER_MAP = {
     "gemini_cli": GeminiAuthBase,
     "qwen_code": QwenAuthBase,
     "iflow": IFlowAuthBase,
     "antigravity": AntigravityAuthBase,
+    "freebuff": FreebuffAuthBase,
 }
 
 def get_provider_auth_class(provider_name: str):