fix(catalog): stop routed rows inheriting the template's comp_hash

scripts/test-layout/layout.json

@@ -314,6 +314,7 @@
     "catalog-opencode-go-context-window.test.ts": "codex-integration",
     "catalog-remote-pull.test.ts": "codex-integration",
     "catalog-retain-models.test.ts": "codex-integration",
+    "catalog-routed-comp-hash.test.ts": "codex-integration",
     "catalog-seed-window-fill.test.ts": "codex-integration",
     "catalog-slug-uniqueness-boundary.test.ts": "codex-integration",
     "catalog-verbosity-default.test.ts": "codex-integration",

src/codex/catalog/derive-entry.ts

@@ -144,6 +144,11 @@ export function deriveEntry(
         delete e.context_window;
         delete e.max_context_window;
         delete e.auto_compact_token_limit;
+        // Nor its comp_hash (#5796). Codex compacts a thread whenever the recorded value
+        // changes, and the template is whichever native row a rebuild found first, so an
+        // inherited value moves with rebuild order. Left unset, normalization gives every
+        // routed row the same "opencodex" marker.
+        delete e.comp_hash;
       }
       if (typeof e.base_instructions === "string") {
         // Proxy-neutral: keep the GPT-5/OpenAI disclaimer but never advertise the opencodex proxy

structure/catalog.md

@@ -58,7 +58,9 @@ provider-wide fallback. Exact model output limits precede the provider default o
   explicitly configured canonical `openai/gpt-daybreak-blue-latest` Codex-forward row from the
   pinned Sol capability metadata while preserving its selector and Daybreak wire identity;
   this never expands the bare/API-key model lists or rewrites the wire model to `gpt-5.6-sol`;
-- clones a native template for routed `provider/model` entries;
+- clones a native template for routed `provider/model` entries without its `comp_hash`, so every
+  routed row carries the fixed `"opencodex"` marker instead of whichever native row a rebuild found
+  first; Codex compacts a thread whenever that value changes (#5796);
 - forces strict Codex catalog fields required by the current parser;
 - hides `disabledModels` without blocking direct routing (routed provider ids are excluded;
   account-qualified native ids hide only that selector row; BARE native slugs hide the bare row

tests/codex-integration/catalog-routed-comp-hash.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, test } from "bun:test";
+import { buildCatalogEntries } from "../../src/codex/catalog";
+
+/**
+ * A routed row is cloned from whichever native row a rebuild picks as the template, and it
+ * used to keep that row's `comp_hash` (#5796). Codex compacts a thread when consecutive turns
+ * record different values, so a rebuild that picked another template compacted every active
+ * routed thread.
+ */
+describe("catalog — routed comp_hash", () => {
+  const routedHash = (compHash: string | undefined) => buildCatalogEntries(
+    {
+      slug: "gpt-5.5",
+      display_name: "gpt-5.5",
+      description: "Native GPT model",
+      priority: 1,
+      visibility: "list",
+      base_instructions: "You are Codex, a coding agent based on GPT-5.",
+      ...(compHash === undefined ? {} : { comp_hash: compHash }),
+    },
+    [],
+    [{ provider: "local", id: "qwen3-coder" }],
+  ).find(e => e.slug === "local/qwen3-coder")?.comp_hash;
+
+  test("routed rows keep one value whichever native row is the template", () => {
+    expect(routedHash("3000")).toBe("opencodex");
+    expect(routedHash("2911")).toBe("opencodex");
+    expect(routedHash(undefined)).toBe("opencodex");
+  });
+});

tests/fixtures/test-layout-expected.json

@@ -140,6 +140,7 @@
   "catalog-opencode-go-context-window.test.ts": "codex-integration",
   "catalog-remote-pull.test.ts": "codex-integration",
   "catalog-retain-models.test.ts": "codex-integration",
+  "catalog-routed-comp-hash.test.ts": "codex-integration",
   "catalog-seed-window-fill.test.ts": "codex-integration",
   "catalog-slug-uniqueness-boundary.test.ts": "codex-integration",
   "catalog-verbosity-default.test.ts": "codex-integration",