feat(ai-sdk): controlled interpretation-intent guidance override (#34)

ai-compliance-sdk/internal/ucca/authority_rerank.go

@@ -1,20 +1,61 @@
 package ucca
 
-import "sort"
+import (
+	"sort"
+	"strings"
+)
 
 // Re-ranking coefficients (validated in the offline golden harness; Phase A — conservative).
 const (
-	authorityCoef     = 0.40 // * weight/100
-	jurisdictionGain  = 0.05 // binding/guidance from DE or EU
-	foreignPenalty    = 0.60 // foreign law on a DE/EU question (demoted, not removed)
-	unknownPenalty    = 0.08
-	domainMatchGain   = 0.15
-	offDomainPenalty  = 0.10 // off-domain binding (demoted, not removed)
-	scopePenalty      = 0.25 // BDSG Teil 3 (law enforcement) on a general DP question
-	topicGain         = 0.18 // amplifier only
-	supersededPenalty = 0.50 // superseded Alt-Quelle (pre-eu-v1): demoted, nicht versteckt
+	authorityCoef        = 0.40 // * weight/100
+	jurisdictionGain     = 0.05 // binding/guidance from DE or EU
+	foreignPenalty       = 0.60 // foreign law on a DE/EU question (demoted, not removed)
+	unknownPenalty       = 0.08
+	domainMatchGain      = 0.15
+	offDomainPenalty     = 0.10 // off-domain binding (demoted, not removed)
+	scopePenalty         = 0.25 // BDSG Teil 3 (law enforcement) on a general DP question
+	topicGain            = 0.18 // amplifier only
+	supersededPenalty    = 0.50 // superseded Alt-Quelle (pre-eu-v1): demoted, nicht versteckt
+	guidanceIntentGain   = 0.25 // controlled guidance override on explicit interpretation intent
+	guidanceIntentMargin = 0.05 // ...only if the guideline is semantically competitive with binding
 )
 
+// guidanceIntentSignals mark a query that EXPLICITLY asks for an interpretation /
+// recommendation by a guidance body, rather than for the binding obligation. Only
+// then may a (semantically competitive) guideline outrank the binding norm.
+var guidanceIntentSignals = []string{
+	"edpb", "europäischer datenschutzausschuss", "europaeischer datenschutzausschuss",
+	"dsk", "enisa", "bsi", "leitlinie", "guideline", "orientierungshilfe",
+	"auslegung", "empfiehlt", "empfehlung", "sagt", "laut",
+}
+
+// queryWantsGuidance reports whether the query explicitly asks for guidance/interpretation.
+func queryWantsGuidance(query string) bool {
+	q := strings.ToLower(query)
+	for _, sig := range guidanceIntentSignals {
+		if strings.Contains(q, sig) {
+			return true
+		}
+	}
+	return false
+}
+
+// bestBindingSemantic returns the highest RAW semantic score among binding-law
+// results (0 if none / intent not requested). Used as the guard threshold so an
+// off-topic guideline cannot ride the interpretation-intent boost.
+func bestBindingSemantic(results []LegalSearchResult, wantsGuidance bool) float64 {
+	if !wantsGuidance {
+		return 0
+	}
+	best := 0.0
+	for _, r := range results {
+		if r.SourceClass == "binding_law" && r.Score > best {
+			best = r.Score
+		}
+	}
+	return best
+}
+
 // authorityScore computes the normative relevance of a result for a query. It augments the
 // semantic score with authority/jurisdiction/domain/scope/topic signals. Exposed for tests.
 func authorityScore(query string, r LegalSearchResult, qDomain string, qForeign bool) float64 {
@@ -62,11 +103,21 @@ func rerankByAuthority(query string, results []LegalSearchResult) []LegalSearchR
 	}
 	qDomain := queryDomain(query)
 	qForeign := queryIsForeign(query)
+	wantsGuidance := queryWantsGuidance(query)
+	bestBindingSem := bestBindingSemantic(results, wantsGuidance)
 
 	out := make([]LegalSearchResult, len(results))
 	copy(out, results)
 	for i := range out {
 		out[i].Score = authorityScore(query, out[i], qDomain, qForeign)
+		// Interpretations-Intent (eng begrenzt): NUR wenn die Query explizit nach
+		// Guidance/Auslegung fragt UND die Leitlinie semantisch konkurrenzfaehig ist
+		// (>= bester binding-Treffer - margin), darf supervisory_guidance die bindende
+		// Norm ueberholen. Sonst bleibt binding > guidance (Normfrage unveraendert).
+		if wantsGuidance && out[i].SourceClass == "supervisory_guidance" &&
+			results[i].Score >= bestBindingSem-guidanceIntentMargin {
+			out[i].Score += guidanceIntentGain
+		}
 	}
 	sort.SliceStable(out, func(a, b int) bool {
 		return out[a].Score > out[b].Score