From bcd53cdd8896ec42f6f4db6ac5c8fca965dfc419 Mon Sep 17 00:00:00 2001
From: Govind Tiwari <108tiwari.g@gmail.com>
Date: Thu, 30 Jul 2026 00:14:19 +0530
Subject: [PATCH] fix(tui): show context percentage relative to input limit

Compaction triggers based on limit.input (when available), but the TUI
context indicator used limit.context as the denominator. For models where
limit.input < limit.context (e.g. gpt-5.6-sol via codex: input=372K vs
context=500K), this caused compaction to start when the TUI showed only
~30-35% usage.

Now uses limit.input when present, falling back to limit.context, so the
displayed percentage reflects when compaction will actually fire.

Fixes #38851
---
 packages/tui/src/component/prompt/index.tsx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/tui/src/component/prompt/index.tsx b/packages/tui/src/component/prompt/index.tsx
index 00efcbed2887..9a692881cc97 100644
--- a/packages/tui/src/component/prompt/index.tsx
+++ b/packages/tui/src/component/prompt/index.tsx
@@ -272,7 +272,8 @@ export function Prompt(props: PromptProps) {
     if (tokens <= 0) return
 
     const model = sync.data.provider.find((item) => item.id === last.providerID)?.models[last.modelID]
-    const pct = model?.limit.context ? `${Math.round((tokens / model.limit.context) * 100)}%` : undefined
+    const limit = model?.limit.input ?? model?.limit.context
+    const pct = limit ? `${Math.round((tokens / limit) * 100)}%` : undefined
     const cost = session?.cost ?? 0
     return {
       context: pct ? `${Locale.number(tokens)} (${pct})` : Locale.number(tokens),