diff --git a/docs/lan-mode.md b/docs/lan-mode.md
index 7bb1990..de19cc0 100644
--- a/docs/lan-mode.md
+++ b/docs/lan-mode.md
@@ -247,6 +247,7 @@ OCP Connect v1.3.0
     Provider: ocp
     Models:
       • ocp/claude-opus-5
+      • ocp/claude-opus-4-8
       • ocp/claude-opus-4-7
       • ocp/claude-opus-4-6
       • ocp/claude-sonnet-5
diff --git a/test-features.mjs b/test-features.mjs
index a3a55bc..7ccf82b 100644
--- a/test-features.mjs
+++ b/test-features.mjs
@@ -4089,15 +4089,18 @@ test("models.json: claude-opus-5 is present in models[] (the entry this PR adds)
 });
 
 // The prompt-char budget is GLOBAL (max across every entry × 3 chars/token), not
-// per-model — see lib/prompt.mjs derivePromptCharBudget. A future entry declaring a
-// native 1M window would therefore raise the truncation ceiling for claude-haiku-4-5
-// too (genuinely 200k), turning OCP-side truncation into an upstream API rejection.
-// Adding one is a deliberate ADR-level change; this pins the current invariant.
-test("models.json: every contextWindow is 200000 (global prompt-budget invariant)", () => {
-  for (const m of _spotModels.models) {
-    assert.equal(m.contextWindow, 200000,
-      `${m.id} declares contextWindow=${m.contextWindow}; a non-200k entry re-scales MAX_PROMPT_CHARS for ALL models (see lib/prompt.mjs)`);
-  }
+// per-model — see lib/prompt.mjs derivePromptCharBudget. An entry declaring a native 1M
+// window would therefore raise the truncation ceiling for claude-haiku-4-5 too (genuinely
+// 200k), turning OCP-side truncation into an upstream API rejection.
+//
+// Asserts the MAX, deliberately, not every entry: ADR 0009 states the budget "scales
+// automatically — no code change", so a future entry with a SMALLER window (say a 128k
+// model) must stay legal and must not fail this suite. Only raising the ceiling is the
+// hazard, and that is an ADR-level decision requiring per-model budgets first.
+test("models.json: max contextWindow is 200000 (global prompt-budget ceiling)", () => {
+  const windows = _spotModels.models.map(m => m.contextWindow);
+  assert.equal(Math.max(...windows), 200000,
+    `max contextWindow re-scales MAX_PROMPT_CHARS for ALL models incl. the 200k-native haiku (see lib/prompt.mjs + ADR 0009)`);
 });
 
 test("models.json: every aliases value resolves to a real models[].id (referential integrity)", () => {