chore(omp): add sol fallback chains

Author: edmundmiller

config/omp/config.yml

@@ -127,3 +127,7 @@ retry:
   maxRetries: 10
   modelFallback: true
   fallbackRevertPolicy: cooldown-expiry
+  fallbackChains:
+    slow:
+      - openai-codex/gpt-5.6-terra:high
+      - openai-codex/gpt-5.6-luna:high

hosts/mactraitorpro/default.nix

@@ -92,6 +92,7 @@
           modelProviderOrder = [
             "openai-codex"
             "xai-oauth"
+            "cursor"
             "opencode-go"
           ];
           retry.modelFallback = true;
@@ -101,11 +102,13 @@
               "xai-oauth/grok-composer-2.5-fast"
             ];
             plan = [
-              "xai-oauth/grok-4.3"
+              "cursor/grok-4.5-high"
               "opencode-go/glm-5.2"
             ];
             slow = [
-              "xai-oauth/grok-4.3"
+              "openai-codex/gpt-5.6-terra:high"
+              "openai-codex/gpt-5.6-luna:high"
+              "cursor/grok-4.5-high"
               "opencode-go/glm-5.2"
             ];
             smol = [

hosts/seqeratop/default.nix

@@ -105,6 +105,18 @@
             smol = "cursor/composer-2.5";
             default = "openai-codex/gpt-5.6-sol:low";
           };
+          retry.fallbackChains = {
+            default = [
+              "openai-codex/gpt-5.6-terra:low"
+              "openai-codex/gpt-5.6-luna:low"
+              "cursor/grok-4.5-high"
+            ];
+            slow = [
+              "openai-codex/gpt-5.6-terra:high"
+              "openai-codex/gpt-5.6-luna:high"
+              "cursor/grok-4.5-high"
+            ];
+          };
           # Match the rest of this host's Seqera branding (stylix seqera-dark,
           # ghostty SeqeraDark/Light, herdr seqera variant). mactraitorpro
           # keeps the shared Catppuccin default.

modules/agents/omp/message-queue.md

@@ -65,6 +65,9 @@ rendered `config.yml`.
 
 - **mactraitorpro**: smol via `xai-oauth/grok-composer-2.5-fast`.
 - **seqeratop**: smol `cursor/composer-2.5`; default `openai-codex/gpt-5.6-sol:low`.
+- **fallbacks**: shared `slow` falls back Sol → Terra → Luna; mactraitorpro
+  then falls back to `cursor/grok-4.5-high` → GLM, while Seqeratop falls back
+  to `cursor/grok-4.5-high` after Terra/Luna for `default` and `slow`.
 
 **Gotcha — Codex catalog lies.** `omp models openai-codex` can list unsupported
 ids; smoke-test every new id before trusting it. Verified GPT-5.6 ids: