diff --git a/.Rbuildignore b/.Rbuildignore
index 232504f..28b2d85 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -22,3 +22,6 @@
 ^\.jules(/.*)?$
 ^\.trivyignore\.yaml$
 ^trivy\.yaml$
+^\.semgrepignore$
+^test_dummy\.R$
+^test_validation\.R$
diff --git a/.jules/sentinel.md b/.jules/sentinel.md
index a8207a4..f906381 100644
--- a/.jules/sentinel.md
+++ b/.jules/sentinel.md
@@ -2,3 +2,7 @@
 **Vulnerability:** Unvalidated inputs passed to `if()` statements can cause process crashes (`condition has length > 1`) or unexpected coercion vulnerabilities.
 **Learning:** In R, optional boolean parameters that default to `NULL` should be validated using explicit runtime type validation (e.g., `if (!is.null(flag) && (!is.logical(flag) || length(flag) != 1 || is.na(flag)))`).
 **Prevention:** Always implement explicit runtime type validation for optional boolean parameters.
+## 2024-07-24 - [CRITICAL] Fix integer overflow coercion vulnerability in interactive inputs
+**Vulnerability:** Interactive `readline()` prompts for binary choices (1 or 2) used unbounded digit class regex (`^[0-9]+$`). If a user provided an excessively large numeric string, it would pass the validation check but could evaluate to `NA` when passed to `as.integer()`, leading to process crashes downstream.
+**Learning:** In R, converting strings representing integers larger than R's `.Machine$integer.max` using `as.integer()` results in `NA` and raises a warning. If this result isn't explicitly handled for `NA` values, it can lead to coercion vulnerabilities and unexpected behaviors.
+**Prevention:** When validating numeric strings for known bounded choices (e.g., 1 or 2), strictly match the exact expected values in the regex (e.g., `^[12]$`) instead of simply checking for numeric formats (`^[0-9]+$`).
diff --git a/R/aFIPC.R b/R/aFIPC.R
index 6254651..918e19b 100644
--- a/R/aFIPC.R
+++ b/R/aFIPC.R
@@ -141,7 +141,7 @@ autoFIPC <-
       }
       for (attempt in seq_len(3)) {
         n <- readline(prompt = "Is it correct? (1: Yes 2: No) : ")
-        if (grepl("^[0-9]+$", n)) {
+        if (grepl("^[12]$", n)) {
           return(as.integer(n))
         }
       }
@@ -171,7 +171,7 @@ autoFIPC <-
               readline(
                 prompt = "Do you want to use default BILOG-MG priors for oldform Data? (1: Yes 2: No) : "
               )
-            if (grepl("^[0-9]+$", n)) {
+            if (grepl("^[12]$", n)) {
               return(as.integer(n))
             }
           }
@@ -390,7 +390,7 @@ autoFIPC <-
               readline(
                 prompt = "Do you want to use default BILOG-MG priors for newform Data? (1: Yes 2: No) : "
               )
-            if (grepl("^[0-9]+$", n)) {
+            if (grepl("^[12]$", n)) {
               return(as.integer(n))
             }
           }
diff --git a/test_dummy.R b/test_dummy.R
deleted file mode 100644
index e6f7019..0000000
--- a/test_dummy.R
+++ /dev/null
@@ -1,2 +0,0 @@
-source("R/aFIPC.R")
-source("R/surveyFA.R")
diff --git a/test_validation.R b/test_validation.R
deleted file mode 100644
index f084116..0000000
--- a/test_validation.R
+++ /dev/null
@@ -1,3 +0,0 @@
-source("R/aFIPC.R")
-source("R/surveyFA.R")
-print("Syntax check passed")