From 02ad44a678ea52c26340f7a441f041df7bad67d0 Mon Sep 17 00:00:00 2001
From: ejfn <148174+ejfn@users.noreply.github.com>
Date: Mon, 1 Jun 2026 22:59:52 +0930
Subject: [PATCH] docs: clarify card matching and duplicate play constraints in
 prompt guidelines

---
 src/ai/llm/llmPromptTemplates.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ai/llm/llmPromptTemplates.ts b/src/ai/llm/llmPromptTemplates.ts
index 30ce533..bae635f 100644
--- a/src/ai/llm/llmPromptTemplates.ts
+++ b/src/ai/llm/llmPromptTemplates.ts
@@ -23,7 +23,7 @@ Trust the **Rule Score** ordering as your baseline, cashing bosses first and ble
 - **Multi-Combo Leads**: Leading a multi-combo (multiple combos of the same suit played at once, non-trump only) is legal ONLY when every component is unbeatable (boss) or all three other players are void in that suit.
 
 ## 5. Following Strategy & Constraints
-- **Absolute Laws**: Follow the led suit/trump group if you hold it. You must match the led combo structure — obey the requirements in **## Suit-Following Analysis** (provided in the prompt below) and NEVER split pairs when matching structure is required (e.g. if a pair/tractor is led and you hold pairs, you must follow with them). If a multi-combo is led, match the combo structure and total length.
+- **Absolute Laws**: Follow the led suit/trump group if you hold it. You must match the led combo structure — obey the requirements in **## Suit-Following Analysis** (provided in the prompt below). If you do not hold matching combos (e.g. you hold only singles under a pair lead), follow with singles instead. NEVER split pairs when matching combos are held, and NEVER play or duplicate cards that are not explicitly shown in your hand list — you cannot play a pair or repeat a card's notation unless you hold multiple copies of that card (shown multiple times in your hand/available cards). If a multi-combo is led, match the combo structure and total length.
 - **Seat Guidance**: Obey the situation-specific bullet under **## Seat Guidance** (provided in the prompt below) as your primary instruction. It dynamically tells you when to duck low, bank points on a safe teammate's trick, ruff/sluff, or conserve your elite cards.
 - **Ruffing & Sluffing (Void)**: Ruff only to secure a worthwhile trick (≥10 pts) or block opponents. Size your ruff high enough to survive later players' over-ruffs; if you'll be out-ruffed regardless, use a low card to sluff instead of wasting trump. Never ruff over a teammate who is winning safely.
 - **Conserve Control**: Keep your high trumps and off-suit bosses for tricks you lead or can absolutely win. Spend your cheapest non-point cards on lost tricks.