Hold a decision record to the words rules only from 2026-10-11 (review of #206)

hq's words check never read a decision record, so a correction to any decision
of October 7 to 10 was refused for words it was allowed to write. The links an
accepted record holds are kept by its correction without being judged again.

modules/mesh-knowledge/README.md

@@ -73,14 +73,15 @@ record it goes out from.
      progressive insight in the dated, marked form.
 
    A rule holds a record from the day hq's checks began to hold it (`RuleFrom` in `rules.go`):
-   - retired words from 2026-10-07;
-   - daemons' lines and deferrals from 2026-10-09;
+   - retired words from 2026-10-07 and daemons' lines from 2026-10-09 for a research effort; for a decision record
+     both from 2026-10-11, since hq's words check never read a decision record;
+   - deferrals from 2026-10-09;
    - the clauses from 2026-10-11;
    - the decision record's sections and the live-citation rule, which no hq check held on a decision record,
      from 2026-10-11, the day the knowledge base takes the write.
 
    A progressive insight keeps its record's date, so a correction to an older record is not refused by a rule
-   that never held it. A new record is dated no earlier than the day its number was reserved.
+   that never held it, and it keeps the links the accepted record holds. A new record is dated no earlier than the day its number was reserved.
 3. Revise it by proposing again; every version is kept.
 4. A `review` by someone else either approves it or asks for changes. On approve the record and its clauses are
    accepted and in force. Every clause it changes moves to `changed`, and every record it supersedes moves to

modules/mesh-knowledge/cmd/mesh-knowledge/dated_test.go

@@ -56,11 +56,16 @@ func TestEachDatedRuleHoldsFromItsDay(t *testing.T) {
 		{"clause-lead", "2026-10-10", "2026-10-11"},
 		{"checked", "2026-10-10", "2026-10-11"},
 	} {
-		if Holds(c.rule, c.before) || !Holds(c.rule, c.from) {
-			t.Errorf("%s holds a record of %s: %v, of %s: %v", c.rule, c.before, Holds(c.rule, c.before), c.from, Holds(c.rule, c.from))
+		if Holds(c.rule, KindResearch, c.before) || !Holds(c.rule, KindResearch, c.from) {
+			t.Errorf("%s holds research of %s: %v, of %s: %v", c.rule, c.before, Holds(c.rule, KindResearch, c.before), c.from, Holds(c.rule, KindResearch, c.from))
 		}
 	}
-	if !Holds("title", "2026-01-01") {
+	for _, rule := range []string{"retired-word", "daemon-line"} {
+		if Holds(rule, KindDecision, "2026-10-10") || !Holds(rule, KindDecision, "2026-10-11") {
+			t.Errorf("%s holds a decision from another day than 2026-10-11", rule)
+		}
+	}
+	if !Holds("title", KindDecision, "2026-01-01") {
 		t.Error("an undated rule does not hold an old record")
 	}
 }
@@ -77,3 +82,17 @@ func TestANewRecordIsNotDatedBeforeItsReservation(t *testing.T) {
 		t.Fatalf("a new record dated before its reservation: %v", err)
 	}
 }
+
+// hq's words check never read a decision record: a decision keeps the words it was written with. A correction to
+// ADR 0276 (2026-10-10), which writes words and lines those checks held only research and issues to, is taken.
+func TestAnInsightToADecisionOfOctoberKeepsItsWords(t *testing.T) {
+	w := newWorld(t, newMemStore(), hqMain(t))
+	if _, err := w.k.Import("import@test", ImportAsk{}, hqMain(t)); err != nil {
+		t.Fatal(err)
+	}
+	for _, n := range []int{276, 240, 244, 272} {
+		if _, err := w.k.Propose("corrector@ace", insightTo(t, w, Key{KindDecision, n})); err != nil {
+			t.Errorf("an insight to ADR %04d was refused: %v", n, err)
+		}
+	}
+}

modules/mesh-knowledge/cmd/mesh-knowledge/rules.go

@@ -121,7 +121,7 @@ func allText(r *Record) string {
 func JudgeRecord(r *Record, held *Entry, lookup Lookup, ref *Reference) []Refusal {
 	var out []Refusal
 	refuse := func(rule, format string, a ...any) {
-		if Holds(rule, r.Date) {
+		if Holds(rule, r.Kind, r.Date) {
 			out = append(out, Refusal{Rule: rule, Says: fmt.Sprintf(format, a...)})
 		}
 	}
@@ -215,16 +215,20 @@ func JudgeRecord(r *Record, held *Entry, lookup Lookup, ref *Reference) []Refusa
 				continue
 			}
 		}
-		switch l.Kind {
-		case LinkBecame:
+		kept := held != nil && held.Current.Accepted() && hasLink(held.Current, l)
+		switch {
+		case kept:
+			// An insight keeps what the accepted record linked, as hq wrote it: a change hq named by record waits
+			// for its clause to be judged.
+		case l.Kind == LinkBecame:
 			if r.Kind != KindResearch || !(l.To.Kind == KindDecision || l.To.Kind == TargetDesign) || l.To.Clause > 0 {
 				refuse("link-fits", "became goes from a research effort to a decision record or a design: not %s", l)
 			}
-		case LinkChanges:
+		case l.Kind == LinkChanges:
 			if !decision || l.To.Kind != KindDecision || l.To.Clause == 0 {
 				refuse("link-fits", "changes goes from a decision (or a clause of it) to a clause of another decision, named as 0276 §4: not %s", l)
 			}
-		case LinkSupersedes, LinkExtends:
+		case l.Kind == LinkSupersedes || l.Kind == LinkExtends:
 			if r.Kind != l.To.Kind || !isRecord || l.To.Clause > 0 {
 				refuse("link-fits", "%s goes from a record to a record of its kind: not %s", l.Kind, l)
 			}
@@ -555,8 +559,19 @@ var RuleFrom = map[string]string{
 	"live-citation":    "2026-10-11",
 }
 
-// Holds says whether a rule holds a record of this date. A record with no day is held to every rule.
-func Holds(rule, date string) bool {
+// DecisionFrom overrides RuleFrom for a decision record: hq's words check never read 02-DECISIONS ("a decision
+// record keeps the words it was written with"), so its retired words and daemons' lines hold a decision only from
+// the day the knowledge base takes the write.
+var DecisionFrom = map[string]string{
+	"retired-word": "2026-10-11",
+	"daemon-line":  "2026-10-11",
+}
+
+// Holds says whether a rule holds a record of this kind and date. A record with no day is held to every rule.
+func Holds(rule, kind, date string) bool {
 	from, dated := RuleFrom[rule]
+	if d, ok := DecisionFrom[rule]; ok && kind == KindDecision {
+		from = d
+	}
 	return !dated || !isDay.MatchString(date) || date >= from
 }