feat(xiaomi): add Xiaomi MiMo as first-class provider

Cherry-picked from PR #7702 by kshitijk4poor.

Adds Xiaomi MiMo as a direct provider (XIAOMI_API_KEY) with models:
- mimo-v2-pro (1M context), mimo-v2-omni (256K, multimodal), mimo-v2-flash (256K, cheapest)

Standard OpenAI-compatible provider checklist: auth.py, config.py, models.py,
main.py, providers.py, doctor.py, model_normalize.py, model_metadata.py,
models_dev.py, auxiliary_client.py, .env.example, cli-config.yaml.example.

Follow-up: vision tasks use mimo-v2-omni (multimodal) instead of the user's
main model. Non-vision aux uses the user's selected model. Added
_PROVIDER_VISION_MODELS dict for provider-specific vision model overrides.
On failure, falls back to aggregators (gemini flash) via existing fallback chain.

Corrects pre-existing context lengths: mimo-v2-pro 1048576→1000000,
mimo-v2-omni 1048576→256000, adds mimo-v2-flash 256000.

36 tests covering registry, aliases, auto-detect, credentials, models.dev,
normalization, URL mapping, providers module, doctor, aux client, vision
model override, and agent init.

hermes_cli/auth.py

@@ -250,6 +250,14 @@ PROVIDER_REGISTRY: Dict[str, ProviderConfig] = {
         api_key_env_vars=("HF_TOKEN",),
         base_url_env_var="HF_BASE_URL",
     ),
+    "xiaomi": ProviderConfig(
+        id="xiaomi",
+        name="Xiaomi MiMo",
+        auth_type="api_key",
+        inference_base_url="https://api.xiaomimimo.com/v1",
+        api_key_env_vars=("XIAOMI_API_KEY",),
+        base_url_env_var="XIAOMI_BASE_URL",
+    ),
 }
 
 
@@ -908,6 +916,7 @@ def resolve_provider(
         "opencode": "opencode-zen", "zen": "opencode-zen",
         "qwen-portal": "qwen-oauth", "qwen-cli": "qwen-oauth", "qwen-oauth": "qwen-oauth",
         "hf": "huggingface", "hugging-face": "huggingface", "huggingface-hub": "huggingface",
+        "mimo": "xiaomi", "xiaomi-mimo": "xiaomi",
         "go": "opencode-go", "opencode-go-sub": "opencode-go",
         "kilo": "kilocode", "kilo-code": "kilocode", "kilo-gateway": "kilocode",
         # Local server aliases — route through the generic custom provider

hermes_cli/config.py

@@ -868,6 +868,21 @@ OPTIONAL_ENV_VARS = {
         "category": "provider",
         "advanced": True,
     },
+    "XIAOMI_API_KEY": {
+        "description": "Xiaomi MiMo API key for MiMo models (mimo-v2-pro, mimo-v2-omni, mimo-v2-flash)",
+        "prompt": "Xiaomi MiMo API Key",
+        "url": "https://platform.xiaomimimo.com",
+        "password": True,
+        "category": "provider",
+    },
+    "XIAOMI_BASE_URL": {
+        "description": "Xiaomi MiMo base URL override (default: https://api.xiaomimimo.com/v1)",
+        "prompt": "Xiaomi base URL (leave empty for default)",
+        "url": None,
+        "password": False,
+        "category": "provider",
+        "advanced": True,
+    },
 
     # ── Tool API keys ──
     "EXA_API_KEY": {

hermes_cli/doctor.py

@@ -51,6 +51,7 @@ _PROVIDER_ENV_HINTS = (
     "AI_GATEWAY_API_KEY",
     "OPENCODE_ZEN_API_KEY",
     "OPENCODE_GO_API_KEY",
+    "XIAOMI_API_KEY",
 )
 
 

hermes_cli/main.py

@@ -934,6 +934,7 @@ def select_provider_and_model(args=None):
         "kilocode": "Kilo Code",
         "alibaba": "Alibaba Cloud (DashScope)",
         "huggingface": "Hugging Face",
+        "xiaomi": "Xiaomi MiMo",
         "custom": "Custom endpoint",
     }
     active_label = provider_labels.get(active, active) if active else "none"
@@ -966,6 +967,7 @@ def select_provider_and_model(args=None):
         ("opencode-go", "OpenCode Go (open models, $10/month subscription)"),
         ("ai-gateway", "AI Gateway (Vercel — 200+ models, pay-per-use)"),
         ("alibaba", "Alibaba Cloud / DashScope Coding (Qwen + multi-provider)"),
+        ("xiaomi", "Xiaomi MiMo (MiMo-V2 models — pro, omni, flash)"),
     ]
 
     def _named_custom_provider_map(cfg) -> dict[str, dict[str, str]]:
@@ -1077,7 +1079,7 @@ def select_provider_and_model(args=None):
         _model_flow_anthropic(config, current_model)
     elif selected_provider == "kimi-coding":
         _model_flow_kimi(config, current_model)
-    elif selected_provider in ("gemini", "zai", "minimax", "minimax-cn", "kilocode", "opencode-zen", "opencode-go", "ai-gateway", "alibaba", "huggingface"):
+    elif selected_provider in ("gemini", "zai", "minimax", "minimax-cn", "kilocode", "opencode-zen", "opencode-go", "ai-gateway", "alibaba", "huggingface", "xiaomi"):
         _model_flow_api_key_provider(config, selected_provider, current_model)
 
     # ── Post-switch cleanup: clear stale OPENAI_BASE_URL ──────────────
@@ -4357,7 +4359,7 @@ For more help on a command:
     )
     chat_parser.add_argument(
         "--provider",
-        choices=["auto", "openrouter", "nous", "openai-codex", "copilot-acp", "copilot", "anthropic", "gemini", "huggingface", "zai", "kimi-coding", "minimax", "minimax-cn", "kilocode"],
+        choices=["auto", "openrouter", "nous", "openai-codex", "copilot-acp", "copilot", "anthropic", "gemini", "huggingface", "zai", "kimi-coding", "minimax", "minimax-cn", "kilocode", "xiaomi"],
         default=None,
         help="Inference provider (default: auto)"
     )

hermes_cli/model_normalize.py

@@ -92,6 +92,7 @@ _MATCHING_PREFIX_STRIP_PROVIDERS: frozenset[str] = frozenset({
     "minimax-cn",
     "alibaba",
     "qwen-oauth",
+    "xiaomi",
     "custom",
 })
 

hermes_cli/models.py

@@ -188,6 +188,11 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
         "deepseek-chat",
         "deepseek-reasoner",
     ],
+    "xiaomi": [
+        "mimo-v2-pro",
+        "mimo-v2-omni",
+        "mimo-v2-flash",
+    ],
     "opencode-zen": [
         "gpt-5.4-pro",
         "gpt-5.4",
@@ -493,6 +498,7 @@ _PROVIDER_LABELS = {
     "alibaba": "Alibaba Cloud (DashScope)",
     "qwen-oauth": "Qwen OAuth (Portal)",
     "huggingface": "Hugging Face",
+    "xiaomi": "Xiaomi MiMo",
     "custom": "Custom endpoint",
 }
 
@@ -535,6 +541,8 @@ _PROVIDER_ALIASES = {
     "hf": "huggingface",
     "hugging-face": "huggingface",
     "huggingface-hub": "huggingface",
+    "mimo": "xiaomi",
+    "xiaomi-mimo": "xiaomi",
 }
 
 
@@ -819,7 +827,7 @@ def list_available_providers() -> list[dict[str, str]]:
         "openrouter", "nous", "openai-codex", "copilot", "copilot-acp",
         "gemini", "huggingface",
         "zai", "kimi-coding", "minimax", "minimax-cn", "kilocode", "anthropic", "alibaba",
-        "qwen-oauth",
+        "qwen-oauth", "xiaomi",
         "opencode-zen", "opencode-go",
         "ai-gateway", "deepseek", "custom",
     ]

hermes_cli/providers.py

@@ -132,6 +132,10 @@ HERMES_OVERLAYS: Dict[str, HermesOverlay] = {
         base_url_override="https://api.x.ai/v1",
         base_url_env_var="XAI_BASE_URL",
     ),
+    "xiaomi": HermesOverlay(
+        transport="openai_chat",
+        base_url_env_var="XIAOMI_BASE_URL",
+    ),
 }
 
 
@@ -222,6 +226,10 @@ ALIASES: Dict[str, str] = {
     "hugging-face": "huggingface",
     "huggingface-hub": "huggingface",
 
+    # xiaomi
+    "mimo": "xiaomi",
+    "xiaomi-mimo": "xiaomi",
+
     # Local server aliases → virtual "local" concept (resolved via user config)
     "lmstudio": "lmstudio",
     "lm-studio": "lmstudio",
@@ -242,6 +250,7 @@ _LABEL_OVERRIDES: Dict[str, str] = {
     "nous": "Nous Portal",
     "openai-codex": "OpenAI Codex",
     "copilot-acp": "GitHub Copilot ACP",
+    "xiaomi": "Xiaomi MiMo",
     "local": "Local endpoint",
 }