From be26d362faff986551c3d507b7191992328485c0 Mon Sep 17 00:00:00 2001
From: Mario Zechner <badlogicgames@gmail.com>
Date: Fri, 16 Jan 2026 01:30:46 +0100
Subject: [PATCH] Fix alt+backspace in Kitty mode and clamp Codex effort (refs
 #752)

---
 packages/ai/src/providers/openai-codex-responses.ts | 1 +
 packages/tui/src/keys.ts                            | 6 +++---
 packages/tui/test/keys.test.ts                      | 6 +++---
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/packages/ai/src/providers/openai-codex-responses.ts b/packages/ai/src/providers/openai-codex-responses.ts
index 7889e23f..b05a3b81 100644
--- a/packages/ai/src/providers/openai-codex-responses.ts
+++ b/packages/ai/src/providers/openai-codex-responses.ts
@@ -209,6 +209,7 @@ function buildSystemPrompt(userSystemPrompt?: string): { instructions: string; d
 
 function clampReasoningEffort(modelId: string, effort: string): string {
 	const id = modelId.includes("/") ? modelId.split("/").pop()! : modelId;
+	if (id.startsWith("gpt-5.2") && effort === "minimal") return "low";
 	if (id === "gpt-5.1" && effort === "xhigh") return "high";
 	if (id === "gpt-5.1-codex-mini") return effort === "high" || effort === "xhigh" ? "high" : "medium";
 	return effort;
diff --git a/packages/tui/src/keys.ts b/packages/tui/src/keys.ts
index 4c8093a5..af7653c6 100644
--- a/packages/tui/src/keys.ts
+++ b/packages/tui/src/keys.ts
@@ -771,8 +771,8 @@ export function matchesKey(data: string, keyId: KeyId): boolean {
 
 		case "backspace":
 			if (alt && !ctrl && !shift) {
-				if (!_kittyProtocolActive) {
-					return data === "\x1b\x7f" || data === "\x1b\b";
+				if (data === "\x1b\x7f" || data === "\x1b\b") {
+					return true;
 				}
 				return matchesKittySequence(data, CODEPOINTS.backspace, MODIFIERS.alt);
 			}
@@ -1065,7 +1065,7 @@ export function parseKey(data: string): string | undefined {
 	if (data === "\x1b[Z") return "shift+tab";
 	if (!_kittyProtocolActive && data === "\x1b\r") return "alt+enter";
 	if (!_kittyProtocolActive && data === "\x1b ") return "alt+space";
-	if (!_kittyProtocolActive && (data === "\x1b\x7f" || data === "\x1b\b")) return "alt+backspace";
+	if (data === "\x1b\x7f" || data === "\x1b\b") return "alt+backspace";
 	if (!_kittyProtocolActive && data === "\x1bB") return "alt+left";
 	if (!_kittyProtocolActive && data === "\x1bF") return "alt+right";
 	if (!_kittyProtocolActive && data.length === 2 && data[0] === "\x1b") {
diff --git a/packages/tui/test/keys.test.ts b/packages/tui/test/keys.test.ts
index 3f936aad..ef46bae6 100644
--- a/packages/tui/test/keys.test.ts
+++ b/packages/tui/test/keys.test.ts
@@ -137,7 +137,7 @@ describe("matchesKey", () => {
 			assert.strictEqual(parseKey("\x00"), "ctrl+space");
 		});
 
-		it("should parse legacy alt-prefixed sequences only when kitty inactive", () => {
+		it("should parse legacy alt-prefixed sequences when kitty inactive", () => {
 			setKittyProtocolActive(false);
 			assert.strictEqual(matchesKey("\x1b ", "alt+space"), true);
 			assert.strictEqual(parseKey("\x1b "), "alt+space");
@@ -153,8 +153,8 @@ describe("matchesKey", () => {
 			setKittyProtocolActive(true);
 			assert.strictEqual(matchesKey("\x1b ", "alt+space"), false);
 			assert.strictEqual(parseKey("\x1b "), undefined);
-			assert.strictEqual(matchesKey("\x1b\b", "alt+backspace"), false);
-			assert.strictEqual(parseKey("\x1b\b"), undefined);
+			assert.strictEqual(matchesKey("\x1b\b", "alt+backspace"), true);
+			assert.strictEqual(parseKey("\x1b\b"), "alt+backspace");
 			assert.strictEqual(matchesKey("\x1b\x03", "ctrl+alt+c"), false);
 			assert.strictEqual(parseKey("\x1b\x03"), undefined);
 			assert.strictEqual(matchesKey("\x1bB", "alt+left"), false);