Add OpenRouter as an OpenAI-compatible reseller provider

Descriptor + curated matrix rows + sk-or- key auto-detect (server and GUI).

coworker/providers/matrix.py

@@ -11,8 +11,8 @@ falls back to the conservative heuristics in ``capabilities.py`` at their own ri
 degraded results. Ids verified against vendor/reseller catalogs on 2026-07-04; refresh the
 reseller rows when catalogs rotate (they rename on every model generation).
 
-Resellers: Together + Fireworks for now. TODO: add Groq and OpenRouter entries here AND their
-descriptors in ``registry.py`` once the current provider surface is tested — deliberately
+Resellers: Together + Fireworks + OpenRouter. TODO: add Groq entries here AND its
+descriptor in ``registry.py`` once the current provider surface is tested — deliberately
 deferred to bound how much needs verifying at once.
 """
 
@@ -112,6 +112,14 @@ MATRIX: dict[str, ModelEntry] = {
     "fireworks:accounts/fireworks/models/llama4-maverick-instruct-basic": ModelEntry(
         "Llama 4 Maverick · via Fireworks"
     ),
+    # OpenRouter slugs are lowercase `<lab>/<model>` (checked against their catalog
+    # 2026-07-25); same labs as above, one key for all of them.
+    "openrouter:z-ai/glm-5.2": ModelEntry("GLM-5.2 · via OpenRouter"),
+    "openrouter:moonshotai/kimi-k2.6": ModelEntry("Kimi K2.6 · via OpenRouter"),
+    "openrouter:deepseek/deepseek-v4-pro": ModelEntry("DeepSeek V4 Pro · via OpenRouter"),
+    "openrouter:meta-llama/llama-4-maverick": ModelEntry(
+        "Llama 4 Maverick · via OpenRouter"
+    ),
 }
 
 

coworker/providers/registry.py

@@ -211,7 +211,7 @@ DESCRIPTORS: list[ProviderDescriptor] = [
                 secret=False,
                 required=False,
                 placeholder="https://…/openai/v1",
-                help="For Azure OpenAI, OpenRouter, vLLM, or any OpenAI-compliant server. Leave blank for api.openai.com.",
+                help="For Azure OpenAI, vLLM, or any OpenAI-compliant server. Leave blank for api.openai.com.",
             ),
         ],
         build=_build_openai,
@@ -316,9 +316,9 @@ DESCRIPTORS: list[ProviderDescriptor] = [
         endpoint_help="Prefilled with the Meta Model API endpoint (public preview, US-only as of 2026-07).",
     ),
     # Resellers: many labs' models behind one key, using THEIR model namespaces (the curated
-    # ids + display labels live in providers/matrix.py). TODO: add Groq and OpenRouter here
-    # (+ their matrix rows) once the current provider surface is tested — deliberately
-    # deferred to bound how much needs verifying at once (owner call, 2026-07-04).
+    # ids + display labels live in providers/matrix.py). TODO: add Groq here (+ its matrix
+    # rows) once the current provider surface is tested — deliberately deferred to bound
+    # how much needs verifying at once (owner call, 2026-07-04).
     _compat(
         "together",
         "Together AI",
@@ -333,6 +333,13 @@ DESCRIPTORS: list[ProviderDescriptor] = [
         recommended_model="accounts/fireworks/models/glm-5p2",
         env_key="FIREWORKS_API_KEY",
     ),
+    _compat(
+        "openrouter",
+        "OpenRouter",
+        base_url="https://openrouter.ai/api/v1",
+        recommended_model="z-ai/glm-5.2",
+        env_key="OPENROUTER_API_KEY",
+    ),
     ProviderDescriptor(
         name="ollama",
         title="Ollama (local models)",
@@ -386,6 +393,8 @@ def detect_provider(api_key: str) -> Optional[str]:
         return None
     if key.startswith("sk-ant-"):
         return "anthropic"
+    if key.startswith("sk-or-"):
+        return "openrouter"
     if key.startswith("AIza"):
         return "gemini"
     if key.startswith(("sk-", "sk_")):

surfaces/gui/src/api.ts

@@ -1324,6 +1324,7 @@ export function detectProvider(apiKey: string): string | null {
   const key = (apiKey || "").trim();
   if (!key) return null;
   if (key.startsWith("sk-ant-")) return "anthropic";
+  if (key.startsWith("sk-or-")) return "openrouter";
   if (key.startsWith("AIza")) return "gemini";
   if (key.startsWith("sk-") || key.startsWith("sk_")) return "openai";
   return null;

tests/test_provider_verify.py

@@ -15,6 +15,7 @@ from coworker.providers import detect_provider, verify_provider_key
     "key,expected",
     [
         ("sk-ant-api03-abc", "anthropic"),
+        ("sk-or-v1-abc", "openrouter"),
         ("AIzaSyAbc123", "gemini"),
         ("sk-proj-abc", "openai"),
         ("sk_live_abc", "openai"),

tests/test_providers.py

@@ -381,6 +381,8 @@ def test_matrix_answers_capabilities_for_reseller_ids():
         "together:zai-org/GLM-5.2",
         "together:meta-llama/Llama-4-Maverick-17B-128E-Instruct-FP8",
         "fireworks:accounts/fireworks/models/kimi-k2p6",
+        "openrouter:z-ai/glm-5.2",
+        "openrouter:meta-llama/llama-4-maverick",
     ):
         caps = capabilities_for(mid)
         assert caps.tools and caps.parallel_tool_calls and caps.streaming
@@ -402,12 +404,12 @@ def test_matrix_labels_and_custom_model_fallback():
 
 
 def test_reseller_descriptors_and_matrix_stay_in_lockstep():
-    """Together/Fireworks suggested models derive from the matrix, and each descriptor's
+    """Reseller suggested models derive from the matrix, and each descriptor's
     recommended model must be one of them (set_provider's auto-add depends on it)."""
     from coworker.providers.matrix import models_for_provider
     from coworker.providers.registry import get_descriptor
 
-    for name in ("together", "fireworks"):
+    for name in ("together", "fireworks", "openrouter"):
         d = get_descriptor(name)
         assert d is not None and d.needs_key
         curated = models_for_provider(name)