chore: auto-commit (97 archivos)

- .claude/CLAUDE.md
- .claude/agents/fn-recopilador/SKILL.md
- .claude/rules/INDEX.md
- .claude/rules/cpp_apps.md
- bash/functions/infra/build_cpp_windows.sh
- cpp/CMakeLists.txt
- cpp/PATTERNS.md
- cpp/framework/app_base.cpp
- cpp/framework/app_base.h
- dev/issues/README.md
- ...

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

functions/core/golden_diff.go

@@ -0,0 +1,32 @@
+package core
+
+// GoldenDiff compares two byte slices and returns a similarity score in [0,1].
+// similarity = matchedBytes / max(len(actual), len(golden)).
+// matched = similarity >= (1.0 - threshold).
+// threshold=0.0 requires exact match; threshold=0.05 tolerates up to 5% divergence.
+// Returns similarity=1.0 and matched=true when both slices are empty.
+func GoldenDiff(actual, golden []byte, threshold float64) (matched bool, similarity float64) {
+	maxLen := len(actual)
+	if len(golden) > maxLen {
+		maxLen = len(golden)
+	}
+	if maxLen == 0 {
+		return true, 1.0
+	}
+
+	minLen := len(actual)
+	if len(golden) < minLen {
+		minLen = len(golden)
+	}
+
+	var matchedBytes int
+	for i := 0; i < minLen; i++ {
+		if actual[i] == golden[i] {
+			matchedBytes++
+		}
+	}
+
+	similarity = float64(matchedBytes) / float64(maxLen)
+	matched = similarity >= (1.0 - threshold)
+	return matched, similarity
+}