refactor(mcp): remove pist-trace-classify from agent/IDE configs

Drop the pist-trace-classify server (and any lingering aws block) from
.mcp.json and opencode.json. It depended on RDS/AWS env vars. Already
removed from ~/.kimi/mcp.json as well.

.mcp.json

@@ -266,21 +266,6 @@
         "GOOGLE_CLIENT_SECRET": "${GOOGLE_CLIENT_SECRET}"
       }
     },
-    "pist-trace-classify": {
-      "_comment": "PIST trace classifier MCP \u2014 from OpenCode config. Classifies braid traces using PIST geometry.",
-      "command": "python3",
-      "args": [
-        "4-Infrastructure/shim/pist_trace_classify_mcp.py"
-      ],
-      "env": {
-        "RDS_HOST": "${RDS_HOST}",
-        "RDS_PORT": "${RDS_PORT}",
-        "RDS_USER": "${RDS_USER}",
-        "RDS_DB": "${RDS_DB}",
-        "RDS_IAM_AUTH": "${RDS_IAM_AUTH}",
-        "AWS_REGION": "${AWS_REGION}"
-      }
-    },
     "opencode-prover": {
       "_comment": "OpenCode Prover MCP \u2014 from OpenCode config. Lean proof verification bridge for OpenCode/Codex CLI.",
       "command": "python3",

opencode.json

@@ -46,22 +46,6 @@
       },
       "enabled": true
     },
-    "pist-trace-classify": {
-      "type": "local",
-      "command": [
-        "python3",
-        "4-Infrastructure/shim/pist_trace_classify_mcp.py"
-      ],
-      "environment": {
-        "RDS_HOST": "{env:RDS_HOST}",
-        "RDS_PORT": "{env:RDS_PORT}",
-        "RDS_USER": "{env:RDS_USER}",
-        "RDS_DB": "{env:RDS_DB}",
-        "RDS_IAM_AUTH": "{env:RDS_IAM_AUTH}",
-        "AWS_REGION": "{env:AWS_REGION}"
-      },
-      "enabled": true
-    },
     "opencode-prover": {
       "type": "local",
       "command": [
@@ -80,4 +64,4 @@
     }
   },
   "$schema": "https://opencode.ai/config.json"
-}
+}