fix(execute): the completion gate says which checks are commands and which are executor judgement

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/lib/fix-round-4-5a-prose.test.mjs

@@ -785,3 +785,48 @@ test('[#33] no gates_mode = \'closed\', "strictest" or --event gates_mode_flag_o
     '### High-effort behavior (v5.1.1) High effort changes nothing in `/trekexecute`: the step helper and the controller '
     + 'already run opus, and every gate already runs. No `gates_mode` is set from the effort.');
 });
+
+// --- #28 ---------------------------------------------------------------------------
+
+/** The completion gate's text with its blockquote markers removed, flattened. */
+function completionGate() {
+  return flat(section(read(EXEC), '### Machine-verifiable completion gate (stop-signal contract)').replace(/^> ?/gm, ''));
+}
+
+test('[#28] the completion gate calls nothing deterministic that is executor judgement, and cites no line number', () => {
+  const gate = completionGate();
+  assert.ok(!gate.includes('Counter liveness (deterministic'), 'clause 3 still calls the counter check deterministic');
+  assert.ok(!gate.includes('deterministic audit'), 'the gate still says termination rests on a deterministic audit');
+  assert.ok(!gate.includes('`:1221`'), 'the gate still cites `:1221`');
+  assert.doesNotMatch(gate, /`:\d+`/, 'the gate cites a line number; line numbers rot');
+  assert.ok(gate.includes('Counter liveness (checked by the executor against the audit\'s counts, defeats "never decremented")'),
+    'clause 3 does not say the executor checks the counter against the audit\'s counts');
+  assert.ok(gate.includes('rests on the audit and an objective stop-signal, never on the model\'s narrative'),
+    'the termination sentence does not rest on the audit and an objective stop-signal');
+});
+
+test('[#28] the completion gate names its commands and its executor judgement, and each command is in Phase 7.5', () => {
+  const gate = completionGate();
+  const c = gate.indexOf('Commands:');
+  const j = gate.indexOf('Executor judgement:');
+  assert.ok(c !== -1, 'the gate does not say which checks are commands');
+  assert.ok(j > c, 'the gate does not say which checks are executor judgement, after its commands');
+  const commands = gate.slice(c, j);
+  const judgement = gate.slice(j);
+  // Phase 7.5's own steps only: the gate subsection after them holds the Commands part under test.
+  const phase75 = section(read(EXEC), '## Phase 7.5 — Manifest audit (independent)');
+  const gateAt = phase75.indexOf('\n### Machine-verifiable completion gate');
+  assert.ok(gateAt !== -1, 'Phase 7.5 no longer holds the completion gate subsection');
+  const audit = flat(phase75.slice(0, gateAt));
+  assert.ok(!audit.includes('Commands:'), 'the audit slice still holds the gate\'s Commands part');
+  for (const cmd of ['git rev-list --count', 'bash -n', 'git diff --name-only', 'done-line.mjs --check']) {
+    assert.ok(commands.includes(cmd), `the Commands part does not name ${cmd}`);
+    assert.ok(audit.includes(cmd), `Phase 7.5 does not run ${cmd}, so the gate cannot call it a command`);
+  }
+  for (const s of ['criteria runner', 'arch-rules.mjs', 'plan-scope-sweep.mjs']) {
+    assert.ok(commands.includes(s), `the Commands part does not name ${s}`);
+  }
+  for (const s of ['steps 1, 2 and 4', 'the expected count in step 3', 'clause 3\'s formula']) {
+    assert.ok(judgement.includes(s), `the Executor judgement part does not name ${s}`);
+  }
+});