fix(kimi): reconcile sk-kimi- routing with Anthropic SDK URL semantics

Follow-ups after salvaging xiaoqiang243's kimi-for-coding patches:

- KIMI_CODE_BASE_URL: drop trailing /v1 (was /coding/v1).
  The /coding endpoint speaks Anthropic Messages, and the Anthropic SDK
  appends /v1/messages internally. /coding/v1 + SDK suffix produced
  /coding/v1/v1/messages (a 404). /coding + SDK suffix now yields
  /coding/v1/messages correctly.
- kimi-coding ProviderConfig: keep legacy default api.moonshot.ai/v1 so
  non-sk-kimi- moonshot keys still authenticate. sk-kimi- keys are
  already redirected to api.kimi.com/coding via _resolve_kimi_base_url.
- doctor.py: update Kimi UA to claude-code/0.1.0 (was KimiCLI/1.30.0)
  and rewrite /coding base URLs to /coding/v1 for the /models health
  check (Anthropic surface has no /models).
- test_kimi_env_vars: accept KIMI_CODING_API_KEY as a secondary env var.

E2E verified:
  sk-kimi-<key>  → https://api.kimi.com/coding/v1/messages (Anthropic)
  sk-<legacy>    → https://api.moonshot.ai/v1/chat/completions (OpenAI)
  UA: claude-code/0.1.0, x-api-key: <sk-kimi-*>

hermes_cli/auth.py

@@ -168,7 +168,10 @@ PROVIDER_REGISTRY: Dict[str, ProviderConfig] = {
         id="kimi-coding",
         name="Kimi / Moonshot",
         auth_type="api_key",
-        inference_base_url="https://api.kimi.com/coding",
+        # Legacy platform.moonshot.ai keys use this endpoint (OpenAI-compat).
+        # sk-kimi- (Kimi Code) keys are auto-redirected to api.kimi.com/coding
+        # by _resolve_kimi_base_url() below.
+        inference_base_url="https://api.moonshot.ai/v1",
         api_key_env_vars=("KIMI_API_KEY", "KIMI_CODING_API_KEY"),
         base_url_env_var="KIMI_BASE_URL",
     ),
@@ -340,10 +343,16 @@ def get_anthropic_key() -> str:
 # =============================================================================
 
 # Kimi Code (kimi.com/code) issues keys prefixed "sk-kimi-" that only work
-# on api.kimi.com/coding/v1.  Legacy keys from platform.moonshot.ai work on
-# api.moonshot.ai/v1 (the default).  Auto-detect when user hasn't set
+# on api.kimi.com/coding.  Legacy keys from platform.moonshot.ai work on
+# api.moonshot.ai/v1 (the old default).  Auto-detect when user hasn't set
 # KIMI_BASE_URL explicitly.
-KIMI_CODE_BASE_URL = "https://api.kimi.com/coding/v1"
+#
+# Note: the base URL intentionally has NO /v1 suffix.  The /coding endpoint
+# speaks the Anthropic Messages protocol, and the anthropic SDK appends
+# "/v1/messages" internally — so "/coding" + SDK suffix → "/coding/v1/messages"
+# (the correct target). Using "/coding/v1" here would produce
+# "/coding/v1/v1/messages" (a 404).
+KIMI_CODE_BASE_URL = "https://api.kimi.com/coding"
 
 
 def _resolve_kimi_base_url(api_key: str, default_url: str, env_override: str) -> str:

hermes_cli/doctor.py

@@ -943,18 +943,22 @@ def run_doctor(args):
             try:
                 import httpx
                 _base = os.getenv(_base_env, "") if _base_env else ""
-                # Auto-detect Kimi Code keys (sk-kimi-) → api.kimi.com
+                # Auto-detect Kimi Code keys (sk-kimi-) → api.kimi.com/coding/v1
+                # (OpenAI-compat surface, which exposes /models for health check).
                 if not _base and _key.startswith("sk-kimi-"):
                     _base = "https://api.kimi.com/coding/v1"
-                # Anthropic-compat endpoints (/anthropic) don't support /models.
-                # Rewrite to the OpenAI-compat /v1 surface for health checks.
+                # Anthropic-compat endpoints (/anthropic, api.kimi.com/coding
+                # with no /v1) don't support /models.  Rewrite to the OpenAI-compat
+                # /v1 surface for health checks.
                 if _base and _base.rstrip("/").endswith("/anthropic"):
                     from agent.auxiliary_client import _to_openai_base_url
                     _base = _to_openai_base_url(_base)
+                if base_url_host_matches(_base, "api.kimi.com") and _base.rstrip("/").endswith("/coding"):
+                    _base = _base.rstrip("/") + "/v1"
                 _url = (_base.rstrip("/") + "/models") if _base else _default_url
                 _headers = {"Authorization": f"Bearer {_key}"}
                 if base_url_host_matches(_base, "api.kimi.com"):
-                    _headers["User-Agent"] = "KimiCLI/1.30.0"
+                    _headers["User-Agent"] = "claude-code/0.1.0"
                 _resp = httpx.get(
                     _url,
                     headers=_headers,

tests/hermes_cli/test_api_key_providers.py

@@ -71,7 +71,11 @@ class TestProviderRegistry:
 
     def test_kimi_env_vars(self):
         pconfig = PROVIDER_REGISTRY["kimi-coding"]
-        assert pconfig.api_key_env_vars == ("KIMI_API_KEY",)
+        # KIMI_API_KEY is the primary env var; KIMI_CODING_API_KEY is a
+        # secondary fallback for Kimi Code sk-kimi- keys so users don't
+        # have to overload the same variable.
+        assert "KIMI_API_KEY" in pconfig.api_key_env_vars
+        assert "KIMI_CODING_API_KEY" in pconfig.api_key_env_vars
         assert pconfig.base_url_env_var == "KIMI_BASE_URL"
 
     def test_minimax_env_vars(self):