From 7566197269a4a1767df1ce4d39f8fad6844ec587 Mon Sep 17 00:00:00 2001
From: Jackson Moore <jacksonmoore@tuta.io>
Date: Fri, 4 Sep 2026 14:32:23 +0200
Subject: Expose diagnostic full reset

---
 tests/run.lua | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'tests/run.lua')

diff --git a/tests/run.lua b/tests/run.lua
index e00f694..d4535ef 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -8415,6 +8415,32 @@ test("ActionFacade Reset applies public cleanup and returns neutral", function()
   falsy(host:timers()[timer].active)
 end)
 
+test("Diagnostic full reset is available only through diagnostic API", function()
+  local state, transitions = fresh_sequence_state()
+  transitions:BeginAcquisition("n", "f")
+  transitions:CommitAcquiredTarget("n", target("a"), 10)
+  transitions:CommitCommandSuccess(
+    "n",
+    domain.Position.new(1, 2),
+    domain.Direction.FORWARD
+  )
+  local host = MemoryHost.new({ cursor = { line = 1, byte_column = 2 } })
+  local root = composition_root.new({ host = host })
+  local activation = root:activate()
+
+  same(nil, activation.actions.DiagnosticFullReset)
+  local outcome = root:diagnostic_full_reset()
+  same(domain.ActionKind.NEUTRAL, outcome.kind)
+  same(nil, state:get_previous_descriptor("n"))
+  same(nil, state:get_previous_target("n"))
+  same(nil, state.last_input_context)
+  falsy(state.moved_forward)
+  falsy(state.moved_forward_initialized)
+  fails(function()
+    host:invoke_action("DiagnosticFullReset")
+  end, "not registered")
+end)
+
 test("Same-direction explicit coordination reads current-context state", function()
   local _, transitions = fresh_sequence_state()
   local normal_target = target("a")
-- 
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