fix: remove todo list filtering from custom instructions

Remove the filtering logic that was excluding update_todo_list references
from mode-specific instructions when todoListEnabled was false. The todo
list tool availability should be controlled at the tool level, not by
filtering instructions.

Author: daniel-lxs

src/core/prompts/sections/custom-instructions.ts

@@ -259,27 +259,7 @@ export async function addCustomInstructions(
 
 	// Add mode-specific instructions after
 	if (typeof modeCustomInstructions === "string" && modeCustomInstructions.trim()) {
-		let instructions = modeCustomInstructions.trim()
-
-		// Filter out todo list references if todoListEnabled is false
-		if (options.settings?.todoListEnabled === false) {
-			// Remove sentences that mention update_todo_list
-			instructions = instructions
-				.split("\n")
-				.map((line) => {
-					// Skip lines that mention update_todo_list tool
-					if (line.includes("update_todo_list") || line.includes("todo list using the")) {
-						return ""
-					}
-					return line
-				})
-				.filter((line) => line !== "")
-				.join("\n")
-				// Clean up any double line breaks that might have been created
-				.replace(/\n\n+/g, "\n\n")
-		}
-
-		sections.push(`Mode-specific Instructions:\n${instructions}`)
+		sections.push(`Mode-specific Instructions:\n${modeCustomInstructions.trim()}`)
 	}
 
 	// Add rules - include both mode-specific and generic rules if they exist