feat(workflow): add ZAI Coding + OpenAI provider for sisyphus-agent

- Add zai-coding-plan provider with GLM 4.7 and GLM 4.6v models
- Add OpenAI provider with GPT-5.2 models
- Configure unspecified-low category to use zai-coding-plan/glm-4.7
- Auth is provided via OPENCODE_AUTH_JSON secret

.github/workflows/sisyphus-agent.yml

@@ -152,6 +152,41 @@ jobs:
                   "limit": { "context": 200000, "output": 64000 }
                 }
               }
+            } |
+            .provider["zai-coding-plan"] = {
+              "name": "Z.AI Coding Plan",
+              "npm": "@ai-sdk/openai-compatible",
+              "options": {
+                "baseURL": "https://api.z.ai/api/paas/v4"
+              },
+              "models": {
+                "glm-4.7": {
+                  "id": "glm-4.7",
+                  "name": "GLM 4.7",
+                  "limit": { "context": 128000, "output": 16000 }
+                },
+                "glm-4.6v": {
+                  "id": "glm-4.6v",
+                  "name": "GLM 4.6 Vision",
+                  "limit": { "context": 128000, "output": 16000 }
+                }
+              }
+            } |
+            .provider.openai = {
+              "name": "OpenAI",
+              "npm": "@ai-sdk/openai",
+              "models": {
+                "gpt-5.2": {
+                  "id": "gpt-5.2",
+                  "name": "GPT-5.2",
+                  "limit": { "context": 128000, "output": 16000 }
+                },
+                "gpt-5.2-codex": {
+                  "id": "gpt-5.2-codex",
+                  "name": "GPT-5.2 Codex",
+                  "limit": { "context": 128000, "output": 32000 }
+                }
+              }
             }
           ' "$OPENCODE_JSON" > /tmp/oc.json && mv /tmp/oc.json "$OPENCODE_JSON"
 
@@ -287,6 +322,9 @@ jobs:
           )
           jq --arg append "$PROMPT_APPEND" '.agents.Sisyphus.prompt_append = $append' "$OMO_JSON" > /tmp/omo.json && mv /tmp/omo.json "$OMO_JSON"
 
+          # Add categories configuration for unspecified-low to use GLM 4.7
+          jq '.categories["unspecified-low"] = { "model": "zai-coding-plan/glm-4.7" }' "$OMO_JSON" > /tmp/omo.json && mv /tmp/omo.json "$OMO_JSON"
+
           mkdir -p ~/.local/share/opencode
           echo "$OPENCODE_AUTH_JSON" > ~/.local/share/opencode/auth.json
           chmod 600 ~/.local/share/opencode/auth.json