fix(rectification): score varga-style groups at equal weight

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/lib/rectification-agentic/core/apply-probe-outcome.ts

@@ -19,9 +19,14 @@ export function outcomeForAnswer(probe: ConflictProbe, answer: AnswerClass): Pro
   return probe.expected_outcomes.find((item) => item.answer_class === answer) ?? null;
 }
 
-export function directionFor(candidateId: string, outcome: ProbeOutcome): ScoreDirection {
-  if (outcome.supports.includes(candidateId)) return outcome.answer_class === "weak_yes" ? "weak_support" : "support";
-  if (outcome.conflicts.includes(candidateId)) return outcome.answer_class === "weak_yes" ? "weak_conflict" : "conflict";
+export function directionFor(
+  candidateId: string,
+  outcome: ProbeOutcome,
+  choiceKind?: ConflictProbe["choice_kind"],
+): ScoreDirection {
+  const halfWeight = outcome.answer_class === "weak_yes" && choiceKind !== "varga_style";
+  if (outcome.supports.includes(candidateId)) return halfWeight ? "weak_support" : "support";
+  if (outcome.conflicts.includes(candidateId)) return halfWeight ? "weak_conflict" : "conflict";
   return "neutral";
 }
 
@@ -60,7 +65,7 @@ export function applyProbeOutcome(
     };
   }
   for (const [id, score] of Object.entries(scores)) {
-    const direction = directionFor(id, outcome);
+    const direction = directionFor(id, outcome, probe.choice_kind);
     if (direction === "conflict") conflictCounts[id] = (conflictCounts[id] ?? 0) + 1;
     if (eliminated.has(id)) {
       next[id] = score;

frontend/src/lib/rectification-agentic/core/candidate-contrast-packet.ts

@@ -602,6 +602,11 @@ export function conflictProbesFromContrast(
       expected_outcomes: outcomes,
       information_gain: probe.informationGain,
       source: "varga_contrast",
+      ...(probe.choiceKind === "varga_style"
+        || probe.choiceKind === "event_quality"
+        || probe.choiceKind === "existence"
+        ? { choice_kind: probe.choiceKind }
+        : {}),
     }];
   });
 }

frontend/src/lib/rectification-agentic/core/compose-receipt.ts

@@ -32,6 +32,7 @@ const CANDIDATE_STATUSES = new Set(["active", "eliminated", "winner", "equivalen
 const EVENT_PRECISIONS = new Set(["day", "month", "year", "unknown"]);
 const EVENT_USAGES = new Set(["training", "holdout", "unused"]);
 const ANSWER_CLASSES = new Set(["yes", "weak_yes", "no", "unsure"]);
+const PROBE_CHOICE_KINDS = new Set(["existence", "varga_style", "event_quality"]);
 const ANSWER_SOURCES = new Set(["choice", "evidence", "declined"]);
 const ROUND_KINDS = new Set(["informative", "low_information"]);
 
@@ -88,7 +89,9 @@ function isConflictProbe(value: unknown): boolean {
     && isStringArray(value.candidate_ids)
     && Array.isArray(value.expected_outcomes) && value.expected_outcomes.every(isProbeOutcome)
     && isFiniteNumber(value.information_gain)
-    && typeof value.source === "string" && value.source.length > 0;
+    && typeof value.source === "string" && value.source.length > 0
+    && (value.choice_kind === undefined
+      || (typeof value.choice_kind === "string" && PROBE_CHOICE_KINDS.has(value.choice_kind)));
 }
 
 function isProbeAnswer(value: unknown): boolean {

frontend/src/lib/rectification-agentic/core/probes-from-engine.ts

@@ -31,6 +31,11 @@ export function probeFromEngine(probe: EngineProbeFields): ConflictProbe | null
     expected_outcomes: outcomes,
     information_gain: probe.information_gain ?? 0,
     source: probe.source,
+    ...(probe.choice_kind === "varga_style"
+      || probe.choice_kind === "event_quality"
+      || probe.choice_kind === "existence"
+      ? { choice_kind: probe.choice_kind }
+      : {}),
   };
 }
 

frontend/src/lib/rectification-agentic/core/types.ts

@@ -36,6 +36,7 @@ export type ResultStatus =
 export type CandidateStatus = "active" | "eliminated" | "winner" | "equivalent";
 export type EventUsage = "training" | "holdout" | "unused";
 export type AnswerClass = "yes" | "weak_yes" | "no" | "unsure";
+export type ProbeChoiceKind = "existence" | "varga_style" | "event_quality";
 export type ScoreDirection = "support" | "weak_support" | "neutral" | "weak_conflict" | "conflict";
 
 export const SCORE_DELTA: Readonly<Record<ScoreDirection, number>> = {
@@ -83,6 +84,7 @@ export type ConflictProbe = Readonly<{
   expected_outcomes: readonly ProbeOutcome[];
   information_gain: number;
   source: string;
+  choice_kind?: ProbeChoiceKind;
 }>;
 
 export type ProbeAnswer = Readonly<{

frontend/src/lib/rectification-agentic/v9/decision-from-dossier.ts

@@ -151,6 +151,11 @@ export function contrastPacketFromLatestResult(
       information_gain: probe.information_gain,
       expected_outcomes: probe.expected_outcomes,
       candidate_ids: probe.candidate_ids,
+      ...(probe.choice_kind === "varga_style"
+        || probe.choice_kind === "event_quality"
+        || probe.choice_kind === "existence"
+        ? { choice_kind: probe.choice_kind }
+        : {}),
     }];
   });
   const merged = mergeEngineProbes(
@@ -248,6 +253,11 @@ function contrastPacketFromState(state: InferenceState): CandidateContrastPacket
         information_gain: item.information_gain,
         expected_outcomes: item.expected_outcomes,
         candidate_ids: item.candidate_ids,
+        ...(item.choice_kind === "varga_style"
+          || item.choice_kind === "event_quality"
+          || item.choice_kind === "existence"
+          ? { choice_kind: item.choice_kind }
+          : {}),
       })),
     candidateTimes: state.candidates
       .filter((item) => item.status !== "eliminated")