emrg: a competition round's target is a reading, and the rules it quotes move

emrg/server/competition_prompt.md

@@ -184,13 +184,29 @@ Write the effective features/models/lessons into memory (so later competitions c
   default when nothing is selected, the quota and when it resets, and when the standings freeze.
   Each platform states this in its own words and none of them defers to another's, so an old
   conclusion about the same platform is a hypothesis to re-check, not a fact to reuse.
+- **The standing a gap is measured against is itself a reading.** The highest number on a
+  leaderboard is an entry, not a standard: it may be one the platform's rules do not permit — a
+  leaked target, an external dataset the rules exclude, a submission later disqualified — and a gap
+  computed against it reports work that no permitted entry had to do. So the score to beat is the
+  best standing the rules allow, and where that differs from the top of the board the round states
+  which of the two its gap is computed against and what accounts for the difference. An entry that
+  is out of reach because the rules forbid the route is not evidence that the route is needed.
 - **A conclusion about what the rules allow is a reading with a source**: before a round acts on
   "not allowed", "already at the ceiling" or "this lever is untried", it goes back to the platform's
   own text and says which kind of claim it is holding — the platform's official wording, quoted; a
   reading this round took; or an assumption written into a prompt, which is labelled as an
   assumption and settled rather than built on. A claim inherited from an index line, from an earlier
   summary or from another competitor's phrasing is none of these, and is re-read before it is acted
   on.
+- **The rules are amended after they are published, and the amendment is part of the text.** A
+  rules page states the rules as first written; corrections, clarifications, exceptions and
+  invitations to appeal arrive afterwards, in that platform's own updates and discussion threads,
+  and a round that concluded from a single reading of the page holds a conclusion about a text that
+  has since moved. So each round re-reads the platform's updates and discussion for what changed
+  since the previous round, and a conclusion drawn from the rules says which round last read them.
+  A correction found there is settled against the rules page rather than replacing it: the page is
+  the rule, the thread is where it was corrected, and a round that cannot tell which it is holding
+  has a reading to take before it acts.
 - **Anything set by hand once goes stale**: a manual selection of submissions, a pending queue, a
   freeze marker — none of them follows the results that arrive afterwards. A selection made in an
   early round stays that selection while later rounds produce better work, so every round after

tests/test_competition_prompt.py

@@ -1762,3 +1762,74 @@ def test_a_section_of_the_summary_is_exempt_from_the_gate_lines():
         "reading in this file is held to"
     )
     assert "pre-registered, measured and attributable" in body
+
+
+# --- the two rules a second measurement of an installation's supplement still found missing ----------
+#
+# The same slot measured again later, with two whole sections of the supplement classified rather than
+# the report taken on trust: 18 rule bullets, and 16 of them were already stated in the body under
+# other words. What was absent is the pair below, and the pair is one subject — *the reference a round
+# measures against is itself a reading, and a stale one* — which is why they are pinned together.
+#
+# ⛔ The supplement is an installation's private file. These tests pin the rules as this template
+# states them, and the rule text here is a paraphrase written in the template's own voice. Nothing
+# from the supplement is copied, and nothing here names where it lives.
+
+
+def test_a_gap_is_measured_against_what_the_rules_allow_not_the_board_top(rendered):
+    """The leaderboard's highest number is an entry, not a standard.
+
+    A gap is arithmetic between the round's own standing and a target, and the target was being read
+    off the top of the board as though every entry there were one the rules permitted. Where the
+    leader is a leaked target, an external dataset the rules exclude or a submission that was
+    disqualified, the gap then reports work no permitted entry had to do — and the levers it implies
+    are levers the rules forbid.
+    """
+    body = _flat(_goal_line(rendered))
+    assert "The standing a gap is measured against is itself a reading" in body, (
+        "§2 no longer says the target of a gap is a reading — the board's top goes back to being "
+        "treated as a standard"
+    )
+    assert "the best standing the rules allow" in body, (
+        "the section lost the compliant frontier itself, which is the whole content of the rule"
+    )
+    assert "leaked target" in body and "disqualified" in body, (
+        "the section no longer names the ways an entry can be ineligible, so a round has no way to "
+        "recognise the case it is meant to catch"
+    )
+    assert "which of the two its gap is computed against" in body, (
+        "the section does not require the round to say which target it used, so a gap against an "
+        "ineligible entry reads as a gap against a permitted one"
+    )
+    assert "is not evidence that the route is needed" in body, (
+        "the consequence is gone: without it the section states a fact about the board and leaves "
+        "the inference that follows from it unwritten"
+    )
+
+
+def test_the_rules_are_re_read_because_they_are_amended_after_publication(rendered):
+    """A conclusion about the rules expires when the rules move.
+
+    The page states the rules as first written; corrections and exceptions arrive afterwards in the
+    platform's updates and discussion threads. A round that read the page once holds a conclusion
+    about a text that has since changed, and nothing in the file asked it to look again.
+    """
+    body = _flat(_goal_line(rendered))
+    assert "The rules are amended after they are published" in body, (
+        "§2 no longer says the rules move after publication — a single reading of the page becomes "
+        "the whole of the reading again"
+    )
+    assert "updates and discussion" in body, (
+        "the section lost the place the corrections actually appear, which is the one thing a round "
+        "can act on"
+    )
+    assert "re-reads the platform's updates and discussion" in body, (
+        "nothing asks for the reading each round, so the rule is true and never used"
+    )
+    assert "which round last read them" in body, (
+        "the conclusion carries no date, so a stale one cannot be recognised as stale"
+    )
+    assert "settled against the rules page rather than replacing it" in body, (
+        "the thread is allowed to override the page, which inverts the authority the section exists "
+        "to place — the page is the rule and the thread is where it was corrected"
+    )