feat(opencode): migrate to duo-workflow models

Update model references across opencode configuration and commands
to use the new duo-workflow family of models. This includes updating
the small_model default, command model specifications, and adding
cost configurations for the new workflow models. Also update the
work environment variable to use duo-workflow-opus-4-6 for improved
performance on complex tasks.

Author: Pedro Pombeiro

.config/dotfiles/gitlab/.opencode/commands/weekly-update.md

@@ -1,6 +1,6 @@
 ---
 description: Post weekly status updates on assigned milestone issues
-model: gitlab/duo-chat-opus-4-6
+model: gitlab/duo-workflow-opus-4-6
 ---
 
 Post weekly status updates on all GitLab issues assigned to me for the current milestone.

.config/opencode/agents/dotfiles.md

@@ -1,7 +1,7 @@
 ---
 description: "Use when the user mentions their dotfiles, dotfiles repo, dotfiles config, yadm, or references commits/changes in their personal configuration. Explores yadm-managed dotfiles in the home directory: find config files under ~/, search dotfile contents, look up agent docs, and inspect yadm git history (log, show, diff)."
 mode: subagent
-model: gitlab/duo-chat-haiku-4-5
+model: gitlab/duo-workflow-haiku-4-5
 hidden: true
 temperature: 0
 steps: 10

.config/opencode/commands/handoff.md

@@ -1,6 +1,6 @@
 ---
 description: Create handoff document for context transfer
-model: gitlab/duo-chat-gpt-5-2-codex
+model: gitlab/duo-workflow-gpt-5-3-codex
 ---
 
 Create a HANDOFF.md file in the current working directory to transfer context to a new agent session.

.config/opencode/commands/push.md

@@ -1,6 +1,6 @@
 ---
 description: Commit changes in logical commits and push
-model: gitlab/duo-chat-haiku-4-5
+model: gitlab/duo-workflow-haiku-4-5
 ---
 
 Commit all changes in discrete, logical commits and push to the remote.

.config/opencode/opencode.json##class.Work

@@ -27,10 +27,15 @@
     }
   },
   "enabled_providers": ["gitlab", "anthropic", "google"],
-  "small_model": "gitlab/duo-chat-haiku-4-5",
+  "small_model": "gitlab/duo-workflow-haiku-4-5",
   "provider": {
     "gitlab": {
       "models": {
+        "duo-workflow-opus-4-6": {
+          "cost": {
+            "input": 5, "output": 25, "cache_read": 0.50, "cache_write": 6.25
+          }
+        },
         "duo-chat-opus-4-6": {
           "cost": {
             "input": 5, "output": 25, "cache_read": 0.50, "cache_write": 6.25
@@ -61,8 +66,17 @@
             "input": 15, "output": 75, "cache_read": 1.50, "cache_write": 18.75
           }
         },
+        "gitlab/duo-workflow-haiku-4-5": {
+          "cost": { "input": 1, "output": 5, "cache_read": 0.10, "cache_write": 1.25 }
+        },
         "duo-chat-haiku-4-5": {
           "cost": { "input": 1, "output": 5, "cache_read": 0.10, "cache_write": 1.25 }
+        },
+        "duo-workflow-gpt-5-3-codex": {
+          "cost": { "input": 1.75, "output": 14, "cache_read": 0.175 }
+        },
+        "duo-workflow-gpt-5-4": {
+          "cost": { "input": 2.50, "output": 15, "cache_read": 0.25 }
         }
       }
     }

.config/opencode/opencode.json##default

@@ -10,7 +10,7 @@
     "opencode-wakatime@latest"
   ],
   "default_agent": "plan",
-  "small_model": "gitlab/duo-chat-haiku-4-5",
+  "small_model": "gitlab/duo-workflow-haiku-4-5",
   "provider": {
     "anthropic": {
       "options": {
@@ -36,6 +36,11 @@
   "provider": {
     "gitlab": {
       "models": {
+        "duo-workflow-opus-4-6": {
+          "cost": {
+            "input": 5, "output": 25, "cache_read": 0.50, "cache_write": 6.25
+          }
+        },
         "duo-chat-opus-4-6": {
           "cost": {
             "input": 5, "output": 25, "cache_read": 0.50, "cache_write": 6.25
@@ -66,8 +71,17 @@
             "input": 15, "output": 75, "cache_read": 1.50, "cache_write": 18.75
           }
         },
+        "gitlab/duo-workflow-haiku-4-5": {
+          "cost": { "input": 1, "output": 5, "cache_read": 0.10, "cache_write": 1.25 }
+        },
         "duo-chat-haiku-4-5": {
           "cost": { "input": 1, "output": 5, "cache_read": 0.10, "cache_write": 1.25 }
+        },
+        "duo-workflow-gpt-5-3-codex": {
+          "cost": { "input": 1.75, "output": 14, "cache_read": 0.175 }
+        },
+        "duo-workflow-gpt-5-4": {
+          "cost": { "input": 2.50, "output": 15, "cache_read": 0.25 }
         }
       }
     }

.config/yadm/scripts/update-work.zsh

@@ -143,7 +143,7 @@ ENABLE_SPRING = "1"
 GITLAB_USE_MODEL_LOAD_BALANCING = "1"
 GITLAB_VIM_URL = "https://gitlab.com"
 OP_BIOMETRIC_UNLOCK_ENABLED = "true"
-OPENCODE_MODEL = "gitlab/duo-chat-opus-4-6"
+OPENCODE_MODEL = "gitlab/duo-workflow-opus-4-6"
 PUMA_WORKER_TIMEOUT = "9999999"
 QA_GITLAB_URL = "http://gdk.test:3000"
 QA_LOG_LEVEL = "DEBUG"