feat: expose bounded final-accept markers

tests/tp-transaction-tests.el

@@ -452,6 +452,32 @@
          :type 'tp-final-marker-error)
         (should (eq (aref target 0) 'old))))))
 
+(ert-deftest tp-transaction-test-public-final-marker-wrappers-share-contract ()
+  "Public marker constructors and registration retain the bounded core rules."
+  (tp-transaction-test--with-surface (_buffer _surface source)
+    (let ((target (vector 'detached 'token 0)))
+      (tp-with-transaction
+        (tp-signal-set source 2)
+        (tp-transaction-register-final-marker
+         :owner-key 'public-host
+         :expected-token
+         (tp-final-marker-expectation-create
+          :target target :index 1 :value 'token)
+         :expected-version
+         (tp-final-marker-expectation-create
+          :target target :index 2 :value 0)
+         :next-values
+         (vector
+          (tp-final-marker-slot-write-create
+           :target target :index 0 :value 'attached))
+         :inverse-values
+         (vector
+          (tp-final-marker-slot-write-create
+           :target target :index 0 :value 'detached))
+         :slot-write-count 1
+         :operation-key 'tp-vector-slots/v1))
+      (should (eq (aref target 0) 'attached)))))
+
 (ert-deftest tp-transaction-test-marker-partial-apply-restores-in-reverse ()
   "Partial marker apply restores applied owners before normal rollback."
   (tp-transaction-test--with-surface (buffer _surface source)

tp-reactive.el

@@ -986,6 +986,23 @@ against the trusted OPERATION-KEY descriptor and the transaction bound."
     (cl-incf tp--transaction-final-marker-slot-writes slot-write-count)
     marker))
 
+(cl-defun tp-transaction-register-final-marker
+    (&key owner-key expected-token expected-version next-values inverse-values
+          slot-write-count operation-key)
+  "Register one bounded final-accept authority marker.
+OWNER-KEY must be unique in the active transaction.  EXPECTED-TOKEN and
+EXPECTED-VERSION bind owner state; NEXT-VALUES and INVERSE-VALUES are prebuilt
+slot-write vectors with fixed SLOT-WRITE-COUNT.  OPERATION-KEY must resolve
+through TP's closed marker-operation whitelist."
+  (tp--transaction-register-final-marker
+   :owner-key owner-key
+   :expected-token expected-token
+   :expected-version expected-version
+   :next-values next-values
+   :inverse-values inverse-values
+   :slot-write-count slot-write-count
+   :operation-key operation-key))
+
 (defun tp--transaction-freeze-final-markers ()
   "Validate and seal every marker before signal commit and final accept."
   (when (and (> tp--transaction-final-marker-count 0)

tp-transaction.el

@@ -588,12 +588,22 @@ ROLLBACK-FAILURES and DIAGNOSTICS are observational snapshots."
   (tp--make-final-marker-expectation
    :target target :index index :value value))
 
+(cl-defun tp-final-marker-expectation-create (&key target index value)
+  "Create a final-marker expectation for TARGET slot INDEX and VALUE."
+  (tp--final-marker-expectation-create
+   :target target :index index :value value))
+
 (cl-defun tp--final-marker-slot-write-create (&key target index value)
   "Create one prebuilt write of VALUE into TARGET slot INDEX."
   (unless (tp--final-marker-vector-index-p target index)
     (signal 'tp-final-marker-error (list :slot-write target index)))
   (tp--make-final-marker-slot-write :target target :index index :value value))
 
+(cl-defun tp-final-marker-slot-write-create (&key target index value)
+  "Create one bounded final-marker write to TARGET slot INDEX with VALUE."
+  (tp--final-marker-slot-write-create
+   :target target :index index :value value))
+
 (defun tp--final-marker-expectation-current-p (expectation)
   "Return non-nil when EXPECTATION matches its current fixed slot."
   (and (tp-final-marker-expectation-p expectation)