Cap generic mult/xmult bonus per candidate; opt Stencil out of it

Any xMult joker used to pulse 'recommended' on a board of four unrelated
+Mult/+Chips jokers: the generic engine-complement +1 in JCA.score
accumulated once per owned joker in partners_for, reaching the threshold
of 4 with zero listable partners (pairwise scores never hit 2), so the
card pulsed while its own tooltip said 'No synergy with your jokers.'

- partners_for now counts the generic +1 once per candidate. Tag/pair
  scores are even, so the generic bonus can no longer flip a
  recommendation at all; a pulsing card always has a nameable partner.
- Joker Stencil is the one xMult joker the generic rule actively
  misreads (its multiplier grows with EMPTY slots), so entries support
  {no_generic = true} which suppresses the rule in score() and the
  generic fallback lines in explain(). Stencil also gains copy_target:
  its real famous synergy is being copied by Blueprint/Brainstorm.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

main.lua

@@ -39,8 +39,10 @@ end
 -- Scoring -------------------------------------------------------------------
 
 -- Synergy score between two joker center keys. 0 = no known synergy.
+-- Second return marks scores whose +1 came from the generic engine
+-- complement, so partners_for can count that bonus once per candidate.
 function JCA.score(a, b)
-    local s = 0
+    local s, generic = 0, false
     if JCA.pair_bonus[pair_key(a, b)] then s = s + 4 end
     local A, B = JCA.db[a], JCA.db[b]
     if A and B then
@@ -51,14 +53,18 @@ function JCA.score(a, b)
             if A.wants[t] then s = s + 2 end
         end
         -- Generic engine complement: a +Mult/+Chips source and an xMult
-        -- multiplier always help each other a little.
-        local a_scaler = A.gives.mult or A.gives.chips
-        local b_scaler = B.gives.mult or B.gives.chips
-        if (A.gives.xmult and b_scaler) or (B.gives.xmult and a_scaler) then
-            s = s + 1
+        -- multiplier usually help each other a little. no_generic opts out
+        -- jokers whose multiplier this reasoning misreads (Joker Stencil).
+        if not (A.no_generic or B.no_generic) then
+            local a_scaler = A.gives.mult or A.gives.chips
+            local b_scaler = B.gives.mult or B.gives.chips
+            if (A.gives.xmult and b_scaler) or (B.gives.xmult and a_scaler) then
+                s = s + 1
+                generic = true
+            end
         end
     end
-    return s
+    return s, generic
 end
 
 -- One short reason why `partner` works with `hovered`, phrased from the
@@ -83,10 +89,12 @@ function JCA.explain(hovered, partner)
             end
         end
     end
-    if B.gives.xmult and (A.gives.mult or A.gives.chips) then
-        return 'multiplies what this adds'
-    elseif A.gives.xmult and (B.gives.mult or B.gives.chips) then
-        return 'feeds this multiplier'
+    if not (A.no_generic or B.no_generic) then
+        if B.gives.xmult and (A.gives.mult or A.gives.chips) then
+            return 'multiplies what this adds'
+        elseif A.gives.xmult and (B.gives.mult or B.gives.chips) then
+            return 'feeds this multiplier'
+        end
     end
     return nil
 end
@@ -102,14 +110,21 @@ end
 
 -- Owned jokers with synergy score >= 2 against `card`, strongest first.
 -- Returns the partner list and the total score across all owned jokers.
+-- The generic mult/xmult complement counts toward the total once per
+-- candidate, not once per owned joker — otherwise any xMult card would
+-- pulse "recommended" on a board of four unrelated +Mult jokers.
 function JCA.partners_for(card)
-    local partners, total = {}, 0
+    local partners, total, generic_seen = {}, 0, false
     if not (G.jokers and G.jokers.cards) then return partners, 0 end
     local key = card.config.center.key
     for _, owned in ipairs(G.jokers.cards) do
         if owned ~= card and owned.config.center.set == 'Joker' then
-            local s = JCA.score(key, owned.config.center.key)
+            local s, generic = JCA.score(key, owned.config.center.key)
             total = total + s
+            if generic then
+                if generic_seen then total = total - 1 end
+                generic_seen = true
+            end
             if s >= 2 then
                 partners[#partners + 1] = {
                     key = owned.config.center.key,