patch pi codex websocket usage-limit error mapping

remove deprecated subagent extension (to be remade later)

flake.lock

@@ -67,11 +67,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1778446047,
-        "narHash": "sha256-oQvcadh2BCkrog+SGrG6YffKJrveYpjj3TdQJWaKhaM=",
+        "lastModified": 1782772816,
+        "narHash": "sha256-s9BuFv0mRuZx9C1MF8qPHRdcAK14ONi0A5m6E2wqOoM=",
         "owner": "nix-community",
         "repo": "bun2nix",
-        "rev": "f2bc12af1a6369648aac41041ceeaa0b866599c6",
+        "rev": "5a39d717029e94163ac223aee8d5c9946cafed1c",
         "type": "github"
       },
       "original": {
@@ -131,11 +131,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1778716662,
-        "narHash": "sha256-m1Yf0wZ8j1OHjTc2UwHwyQRSnNeSgLJOd7q5Y45hzi4=",
+        "lastModified": 1782949081,
+        "narHash": "sha256-vp6Y/Grm98ESt6ceOkWiHWyZRDV3J1RID4w+6NWK9yA=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "f7c1a2d347e4c52d5fb8d10cb4d94b5884e546fb",
+        "rev": "17c9d6cdfc60c64f4ee8d306f9bc0b4ccb51481e",
         "type": "github"
       },
       "original": {
@@ -249,11 +249,11 @@
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1781849779,
-        "narHash": "sha256-Ihdla0v+oCO6dNN6iExgdGc9+JmKLmAnbiTneiJgZbE=",
+        "lastModified": 1783669679,
+        "narHash": "sha256-WDGDMsPXxceC0k1ktqcobmwE4GCTrzzULUKlp1CzSKQ=",
         "owner": "numtide",
         "repo": "llm-agents.nix",
-        "rev": "a1e67cc315b6bd924614d4232e09bab54df3ae39",
+        "rev": "6e9f6664e72433966557ab83a7c3e8c0bbf64a44",
         "type": "github"
       },
       "original": {
@@ -355,11 +355,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1781607440,
-        "narHash": "sha256-rxO+uc/KFbSJp+pgyXRuAX6QlG9hJdnt0BXpEQRXY+U=",
+        "lastModified": 1783279667,
+        "narHash": "sha256-/NAkDSsve+GNM0Bt6tleJdCGfsTlK89nPjkVOzZMo0s=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "3e41b24abd260e8f71dbe2f5737d24122f972158",
+        "rev": "f205b5574fd0cb7da5b702a2da51507b7f4fdd1b",
         "type": "github"
       },
       "original": {