feat(providers): add tencent-tokenhub provider support

Registers tencent-tokenhub (https://tokenhub.tencentmaas.com/v1) as a
new API-key provider with model tencent/hy3-preview (256K context).

- PROVIDER_REGISTRY entry + TOKENHUB_API_KEY / TOKENHUB_BASE_URL env vars
- Aliases: tencent, tokenhub, tencent-cloud, tencentmaas
- openai_chat transport with is_tokenhub branch for top-level
  reasoning_effort (Hy3 is a reasoning model)
- tencent/hy3-preview:free added to OpenRouter curated list
- 60+ tests (provider registry, aliases, runtime resolution,
  credentials, model catalog, URL mapping, context length)
- Docs: integrations/providers.md, environment-variables.md,
  model-catalog.json

Author: simonweng <simonweng@tencent.com>
Salvaged from PR #16860 onto current main (resolved conflicts with
#16935 Azure Anthropic env-var hint tests and the --provider choices=
list removal in chat_parser).

hermes_cli/auth.py

@@ -348,6 +348,14 @@ PROVIDER_REGISTRY: Dict[str, ProviderConfig] = {
         api_key_env_vars=("XIAOMI_API_KEY",),
         base_url_env_var="XIAOMI_BASE_URL",
     ),
+    "tencent-tokenhub": ProviderConfig(
+        id="tencent-tokenhub",
+        name="Tencent TokenHub",
+        auth_type="api_key",
+        inference_base_url="https://tokenhub.tencentmaas.com/v1",
+        api_key_env_vars=("TOKENHUB_API_KEY",),
+        base_url_env_var="TOKENHUB_BASE_URL",
+    ),
     "ollama-cloud": ProviderConfig(
         id="ollama-cloud",
         name="Ollama Cloud",
@@ -1141,6 +1149,8 @@ def resolve_provider(
         "qwen-portal": "qwen-oauth", "qwen-cli": "qwen-oauth", "qwen-oauth": "qwen-oauth", "google-gemini-cli": "google-gemini-cli", "gemini-cli": "google-gemini-cli", "gemini-oauth": "google-gemini-cli",
         "hf": "huggingface", "hugging-face": "huggingface", "huggingface-hub": "huggingface",
         "mimo": "xiaomi", "xiaomi-mimo": "xiaomi",
+        "tencent": "tencent-tokenhub", "tokenhub": "tencent-tokenhub",
+        "tencent-cloud": "tencent-tokenhub", "tencentmaas": "tencent-tokenhub",
         "aws": "bedrock", "aws-bedrock": "bedrock", "amazon-bedrock": "bedrock", "amazon": "bedrock",
         "go": "opencode-go", "opencode-go-sub": "opencode-go",
         "kilo": "kilocode", "kilo-code": "kilocode", "kilo-gateway": "kilocode",

hermes_cli/doctor.py

@@ -57,6 +57,7 @@ _PROVIDER_ENV_HINTS = (
     "OPENCODE_ZEN_API_KEY",
     "OPENCODE_GO_API_KEY",
     "XIAOMI_API_KEY",
+    "TOKENHUB_API_KEY",
 )
 
 

hermes_cli/main.py

@@ -1820,6 +1820,7 @@ def select_provider_and_model(args=None):
         "gmi",
         "nvidia",
         "ollama-cloud",
+        "tencent-tokenhub",
     ):
         _model_flow_api_key_provider(config, selected_provider, current_model)
 

hermes_cli/models.py

@@ -44,6 +44,7 @@ OPENROUTER_MODELS: list[tuple[str, str]] = [
     ("openai/gpt-5.4-mini",             ""),
     ("xiaomi/mimo-v2.5-pro",             ""),
     ("xiaomi/mimo-v2.5",                 ""),
+    ("tencent/hy3-preview:free",         "free"),
     ("openai/gpt-5.3-codex",            ""),
     ("google/gemini-3-pro-image-preview", ""),
     ("google/gemini-3-flash-preview",   ""),
@@ -156,6 +157,7 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
         "moonshotai/kimi-k2.6",
         "xiaomi/mimo-v2.5-pro",
         "xiaomi/mimo-v2.5",
+        "tencent/hy3-preview",
         "anthropic/claude-opus-4.7",
         "anthropic/claude-opus-4.6",
         "anthropic/claude-sonnet-4.6",
@@ -315,6 +317,9 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
         "mimo-v2-omni",
         "mimo-v2-flash",
     ],
+    "tencent-tokenhub": [
+        "hy3-preview",
+    ],
     "arcee": [
         "trinity-large-thinking",
         "trinity-large-preview",
@@ -767,6 +772,7 @@ CANONICAL_PROVIDERS: list[ProviderEntry] = [
     ProviderEntry("anthropic",      "Anthropic",                "Anthropic (Claude models — API key or Claude Code)"),
     ProviderEntry("openai-codex",   "OpenAI Codex",             "OpenAI Codex"),
     ProviderEntry("xiaomi",         "Xiaomi MiMo",              "Xiaomi MiMo (MiMo-V2.5 and V2 models — pro, omni, flash)"),
+    ProviderEntry("tencent-tokenhub", "Tencent TokenHub",       "Tencent TokenHub (Hy3 Preview — direct API via tokenhub.tencentmaas.com)"),
     ProviderEntry("nvidia",         "NVIDIA NIM",               "NVIDIA NIM (Nemotron models — build.nvidia.com or local NIM)"),
     ProviderEntry("qwen-oauth",     "Qwen OAuth (Portal)",      "Qwen OAuth (reuses local Qwen CLI login)"),
     ProviderEntry("copilot",        "GitHub Copilot",           "GitHub Copilot (uses GITHUB_TOKEN or gh auth token)"),
@@ -849,6 +855,10 @@ _PROVIDER_ALIASES = {
     "huggingface-hub": "huggingface",
     "mimo": "xiaomi",
     "xiaomi-mimo": "xiaomi",
+    "tencent": "tencent-tokenhub",
+    "tokenhub": "tencent-tokenhub",
+    "tencent-cloud": "tencent-tokenhub",
+    "tencentmaas": "tencent-tokenhub",
     "aws": "bedrock",
     "aws-bedrock": "bedrock",
     "amazon-bedrock": "bedrock",

hermes_cli/providers.py

@@ -158,6 +158,10 @@ HERMES_OVERLAYS: Dict[str, HermesOverlay] = {
         transport="openai_chat",
         base_url_env_var="XIAOMI_BASE_URL",
     ),
+    "tencent-tokenhub": HermesOverlay(
+        transport="openai_chat",
+        base_url_env_var="TOKENHUB_BASE_URL",
+    ),
     "arcee": HermesOverlay(
         transport="openai_chat",
         base_url_override="https://api.arcee.ai/api/v1",
@@ -293,6 +297,12 @@ ALIASES: Dict[str, str] = {
     "mimo": "xiaomi",
     "xiaomi-mimo": "xiaomi",
 
+    # tencent
+    "tencent": "tencent-tokenhub",
+    "tokenhub": "tencent-tokenhub",
+    "tencent-cloud": "tencent-tokenhub",
+    "tencentmaas": "tencent-tokenhub",
+
     # bedrock
     "aws": "bedrock",
     "aws-bedrock": "bedrock",
@@ -330,6 +340,7 @@ _LABEL_OVERRIDES: Dict[str, str] = {
     "stepfun": "StepFun Step Plan",
     "xiaomi": "Xiaomi MiMo",
     "gmi": "GMI Cloud",
+    "tencent-tokenhub": "Tencent TokenHub",
     "local": "Local endpoint",
     "bedrock": "AWS Bedrock",
     "ollama-cloud": "Ollama Cloud",