From 24eb10a55d1b7724b0d5d7d65e4595dc9f38747b Mon Sep 17 00:00:00 2001
From: Michael Moffett <michael@caliperforge.com>
Date: Mon, 5 Oct 2026 14:43:29 -0600
Subject: [PATCH 1/2] PayKit interface drifts

Ruby `PayKit::Gate` gains `accepts?(protocol)`. `x402_accepted?` and `mpp_accepted?` stay for one release as deprecated aliases of it, and the Rack dispatcher calls `accepts?`.

Issue (Ruby): "`Gate#accepts?(protocol)`; deprecate `x402_accepted?` / `mpp_accepted?`". The spec in `docs/paykit-interface.md:154-158,269-270` says adding a protocol must never grow the `Gate` API.
---
 ruby/lib/pay_kit/gate.rb                  | 10 ++++++--
 ruby/lib/pay_kit/rack/payment_required.rb |  8 +++----
 ruby/test/pay_kit/gate_test.rb            | 28 +++++++++++++++++++++--
 3 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/ruby/lib/pay_kit/gate.rb b/ruby/lib/pay_kit/gate.rb
index 480f8847d..fb485718d 100644
--- a/ruby/lib/pay_kit/gate.rb
+++ b/ruby/lib/pay_kit/gate.rb
@@ -86,12 +86,18 @@ def fees?
       !fees.empty?
     end
 
+    def accepts?(protocol)
+      accept.include?(protocol.to_sym)
+    end
+
     def x402_accepted?
-      accept.include?(:x402)
+      Kernel.warn("PayKit::Gate#x402_accepted? is deprecated; use accepts?(:x402)", uplevel: 1, category: :deprecated)
+      accepts?(:x402)
     end
 
     def mpp_accepted?
-      accept.include?(:mpp)
+      Kernel.warn("PayKit::Gate#mpp_accepted? is deprecated; use accepts?(:mpp)", uplevel: 1, category: :deprecated)
+      accepts?(:mpp)
     end
 
     # Format a BigDecimal as a fixed-point decimal string, trimming
diff --git a/ruby/lib/pay_kit/rack/payment_required.rb b/ruby/lib/pay_kit/rack/payment_required.rb
index d1fc4c1a3..4876ff36e 100644
--- a/ruby/lib/pay_kit/rack/payment_required.rb
+++ b/ruby/lib/pay_kit/rack/payment_required.rb
@@ -154,12 +154,12 @@ def challenge_for(gate, request)
         accepts = []
         headers = {}
 
-        if gate.x402_accepted?
+        if gate.accepts?(:x402)
           accepts << x402_adapter.accepts_entry(gate, request)
           headers.merge!(x402_adapter.challenge_headers(gate, request))
         end
 
-        if gate.mpp_accepted?
+        if gate.accepts?(:mpp)
           accepts << mpp_adapter.accepts_entry(gate, request)
           headers.merge!(mpp_adapter.challenge_headers(gate, request))
         end
@@ -172,11 +172,11 @@ def challenge_for(gate, request)
       # Returns nil when the request has no payment header at all
       # (caller should respond with a challenge).
       def verify(gate, request)
-        if gate.x402_accepted? && x402_adapter.detect?(request)
+        if gate.accepts?(:x402) && x402_adapter.detect?(request)
           return x402_adapter.verify_and_settle(gate, request)
         end
 
-        if gate.mpp_accepted? && mpp_adapter.detect?(request)
+        if gate.accepts?(:mpp) && mpp_adapter.detect?(request)
           return mpp_adapter.verify_and_settle(gate, request)
         end
 
diff --git a/ruby/test/pay_kit/gate_test.rb b/ruby/test/pay_kit/gate_test.rb
index 2ba34cb69..8820b629c 100644
--- a/ruby/test/pay_kit/gate_test.rb
+++ b/ruby/test/pay_kit/gate_test.rb
@@ -84,11 +84,35 @@ def test_x402_auto_disabled_when_fees_present
         pay_to: SELLER,
         fee_within: {PLATFORM => usd("1.00")})
 
-      refute gate.x402_accepted?
-      assert gate.mpp_accepted?
+      refute gate.accepts?(:x402)
+      assert gate.accepts?(:mpp)
     end
   end
 
+  def test_accepts_answers_from_accept
+    PayKitTestHelpers.with_config(accept: %i[mpp]) do
+      gate = build(:report, amount: usd("0.10"))
+
+      assert gate.accepts?(:mpp)
+      assert gate.accepts?("mpp")
+      refute gate.accepts?(:x402)
+      refute gate.accepts?(:stripe)
+    end
+  end
+
+  def test_deprecated_predicates_delegate_and_warn
+    deprecated = Warning[:deprecated]
+    Warning[:deprecated] = true
+    PayKitTestHelpers.with_config(accept: %i[x402 mpp]) do
+      gate = build(:report, amount: usd("0.10"))
+
+      assert_output(nil, /accepts\?/) { assert_equal gate.accepts?(:x402), gate.x402_accepted? }
+      assert_output(nil, /accepts\?/) { assert_equal gate.accepts?(:mpp), gate.mpp_accepted? }
+    end
+  ensure
+    Warning[:deprecated] = deprecated
+  end
+
   def test_explicit_x402_with_fees_raises
     PayKitTestHelpers.with_config(accept: %i[x402 mpp]) do
       assert_raises(PayKit::ConfigurationError) do

From 41994dd31d8478dc6a5a2fb83e812b6b2120c915 Mon Sep 17 00:00:00 2001
From: caliperforge <cf@caliperforge.dev>
Date: Mon, 5 Oct 2026 14:43:31 -0600
Subject: [PATCH 2/2] greptile.json: review on request only

---
 greptile.json | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 greptile.json

diff --git a/greptile.json b/greptile.json
new file mode 100644
index 000000000..3e653b565
--- /dev/null
+++ b/greptile.json
@@ -0,0 +1 @@
+{"autoReview": []}