feat(moments): a mount that keeps arriving where it does not apply proposes its own removal (milestone 458 step 7b, #4955)

The open-after-moment signal proposes a mount; nothing proposed taking one
off, so a wrong mount was noise at every occurrence until someone happened
to notice. rule_misfired(rule_id, moment, why, reached_by) records a report
against a MOUNTED pair, counted per distinct day (the MCP door carries no
session id) on a new rule_moment_judgments.misfire column (migration 0119,
backup v24). At three days the response carries a line asking the agent to
offer the operator the fix - reject takes the rule off, unmap_action stops
the action reaching the moment, confirm keeps the mount and stops the
asking - and Settings > Moments lists it as an unmount proposal with the
reasons and the actions that reached it. A re-mount clears the count.

Taught in moments.md, missed-retrieval.md and the reply hold's wording.

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

frontend/src/components/MomentProposals.vue

@@ -7,11 +7,13 @@ import { useMomentsStore } from "@/stores/moments";
 import { useToastStore } from "@/stores/toast";
 
 /**
- * Proposals that a rule belongs on a moment, waiting on a person (milestone
- * 458 step 7). They come from a pass that read the rule, or from the rule
- * being opened just after the moment fired in several sessions. Nothing here
- * is mounted until "Mount" is pressed — the same judgment `judge_rule_moments`
- * makes in a session, through the same service.
+ * Proposals about a rule's moments, waiting on a person. A mount proposal
+ * (milestone 458 step 7) comes from a pass that read the rule, or from the
+ * rule being opened just after the moment fired in several sessions; nothing
+ * is mounted until "Mount" is pressed. An unmount proposal (step 7b) comes
+ * from sessions reporting that the mount arrived where it did not apply;
+ * nothing is taken off until "Take it off" is pressed. Both are the judgment
+ * `judge_rule_moments` makes in a session, through the same service.
  */
 const store = useMomentsStore();
 const toast = useToastStore();
@@ -35,27 +37,48 @@ function key(rule: RuleProposals, p: MomentProposal): string {
   return `${rule.id}:${p.moment}`;
 }
 
+function plural(n: number, one: string, many: string): string {
+  return `${n} ${n === 1 ? one : many}`;
+}
+
 function sourceLabel(p: MomentProposal): string {
+  if (p.proposal === "unmount") {
+    return `reported as not applying here on ${plural(p.evidence.situations, "day", "days")}`;
+  }
   if (p.source === "signal") {
     return `opened just after this moment in ${p.evidence.situations} sessions`;
   }
   return "proposed from the rule's text";
 }
 
+// What the action that reached the moment was, most frequent first — so the
+// operator can see whether it is the rule or one action that keeps misfiring.
+function actions(p: MomentProposal): string[] {
+  return Object.entries(p.reached_by ?? {})
+    .sort((a, b) => b[1] - a[1])
+    .map(([action, n]) => `${action} ×${n}`);
+}
+
+function note(p: MomentProposal, verdict: Verdict): string {
+  if (p.proposal === "unmount") {
+    return verdict === "confirm" ? "Kept in Settings." : "Taken off in Settings.";
+  }
+  return verdict === "confirm" ? "Mounted in Settings." : "Declined in Settings.";
+}
+
 async function decide(rule: RuleProposals, p: MomentProposal, verdict: Verdict) {
   busy.value = key(rule, p);
   try {
     const out = await judgeProposals([{
-      rule_id: rule.id, moment: p.moment, verdict,
-      note: verdict === "confirm" ? "Mounted in Settings." : "Declined in Settings.",
+      rule_id: rule.id, moment: p.moment, verdict, note: note(p, verdict),
     }]);
     if (out.refused.length) {
       toast.show(out.refused[0].error, "error");
       return;
     }
     await load();
-    // A mount changes the per-moment counts the list below shows.
-    if (verdict === "confirm") await store.load(true);
+    // A mount or an unmount changes the per-moment counts the list below shows.
+    if ((p.proposal === "unmount") === (verdict === "reject")) await store.load(true);
   } catch (e) {
     toast.show(apiErrorMessage(e, "Could not record that"), "error");
   } finally {
@@ -75,8 +98,10 @@ onMounted(load);
     </p>
     <template v-else>
       <p class="field-hint">
-        Moments these rules may belong on. Mounting one makes the rule arrive whenever that
-        moment happens, whatever the work is about; declining keeps it from being proposed again.
+        Moments these rules may belong on, or may not. Mounting one makes the rule arrive
+        whenever that moment happens, whatever the work is about; declining keeps it from being
+        proposed again. A mount that sessions keep reporting as beside the point can be taken
+        off — or, when one action is reaching the moment wrongly, unmapped in the list below.
       </p>
       <ul class="proposal-list">
         <li v-for="rule in rules" :key="rule.id" class="proposal-rule">
@@ -89,12 +114,28 @@ onMounted(load);
           <p class="rule-statement">{{ rule.statement }}</p>
           <ul class="proposal-items">
             <li v-for="p in rule.proposals" :key="key(rule, p)" class="proposal-item">
+              <span v-if="p.proposal === 'unmount'" class="proposal-kind">take off</span>
               <code class="moment-name">{{ p.moment }}</code>
               <span class="proposal-why">
                 {{ p.why || sourceLabel(p) }}
                 <span v-if="p.why" class="proposal-source">· {{ sourceLabel(p) }}</span>
+                <span v-if="actions(p).length" class="proposal-source">
+                  · reached by {{ actions(p).join(", ") }}
+                </span>
               </span>
-              <span class="proposal-actions">
+              <span v-if="p.proposal === 'unmount'" class="proposal-actions">
+                <button
+                  type="button" class="btn-primary btn-sm"
+                  :disabled="busy !== null"
+                  @click="decide(rule, p, 'reject')"
+                >Take it off</button>
+                <button
+                  type="button" class="btn-text"
+                  :disabled="busy !== null"
+                  @click="decide(rule, p, 'confirm')"
+                >Keep it</button>
+              </span>
+              <span v-else class="proposal-actions">
                 <button
                   type="button" class="btn-primary btn-sm"
                   :disabled="busy !== null"
@@ -106,6 +147,9 @@ onMounted(load);
                   @click="decide(rule, p, 'reject')"
                 >Not this</button>
               </span>
+              <ul v-if="p.reasons && p.reasons.length > 1" class="proposal-reasons">
+                <li v-for="r in p.reasons.slice(0, -1).reverse()" :key="r.at">{{ r.why }}</li>
+              </ul>
             </li>
           </ul>
         </li>
@@ -133,6 +177,14 @@ onMounted(load);
 .proposal-why { flex: 1 1 16rem; color: var(--fs-text-secondary); }
 .proposal-source { color: var(--fs-text-tertiary); font-size: var(--fs-size-tiny); }
 .proposal-actions { display: inline-flex; gap: var(--fs-space-2); margin-left: auto; }
+.proposal-kind { font-size: var(--fs-size-tiny); color: var(--fs-text-tertiary); }
+.proposal-reasons {
+  flex-basis: 100%;
+  margin: 0;
+  padding-left: var(--fs-space-4);
+  font-size: var(--fs-size-tiny);
+  color: var(--fs-text-tertiary);
+}
 </style>
 
 <style src="@/assets/moments-shared.css" />