• Create ticket/issue

Follow the guide to enable codebase context checks.

Objective: To create a detailed and reliable record of critical system actions for security analysis
and compliance.

Status: Passed

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Objective: Ensure all identifiers clearly express their purpose and intent, making code
self-documenting

Status: Passed

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Objective: Ensure comprehensive error handling that provides meaningful context and graceful
degradation

Status: Passed

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Objective: To ensure logs are useful for debugging and auditing without exposing sensitive
information like PII, PHI, or cardholder data.

Status: Passed

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Objective: Ensure all data inputs are validated, sanitized, and handled securely to prevent
vulnerabilities

Status: Passed

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Objective: To prevent the leakage of sensitive system information through error messages while
providing sufficient detail for internal debugging.

Status:
Internal error detail: The new error messages include internal implementation detail ("lhs/rhs index out of
bounds in contraction"), which may be surfaced to end-users depending on how
CausalTensorError::EinSumError is presented.

// Get values and accumulate - use Result for proper error handling
let lhs_val = lhs.get(&lhs_index).ok_or_else(|| {
    CausalTensorError::EinSumError(
        EinSumValidationError::InvalidAxesSpecification {
            message: "Internal error: lhs index out of bounds in contraction"
                .to_string(),
        },
    )
})?;
let rhs_val = rhs.get(&rhs_index).ok_or_else(|| {
    CausalTensorError::EinSumError(
        EinSumValidationError::InvalidAxesSpecification {
            message: "Internal error: rhs index out of bounds in contraction"
                .to_string(),
        },
    )
})?;

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Replace the EinSumValidationError::InvalidAxesSpecification error with
CausalTensorError::InvalidOperation for index-out-of-bounds errors to more
accurately reflect that an internal operation has failed.

deep_causality_tensor/src/types/cpu_tensor/ops/tensor_ein_sum/ein_sum_impl.rs [285-301]

 // Get values and accumulate - use Result for proper error handling
 let lhs_val = lhs.get(&lhs_index).ok_or_else(|| {
-    CausalTensorError::EinSumError(
-        EinSumValidationError::InvalidAxesSpecification {
-            message: "Internal error: lhs index out of bounds in contraction"
-                .to_string(),
-        },
+    CausalTensorError::InvalidOperation(
+        "Internal error: lhs index out of bounds in contraction".to_string(),
     )
 })?;
 let rhs_val = rhs.get(&rhs_index).ok_or_else(|| {
-    CausalTensorError::EinSumError(
-        EinSumValidationError::InvalidAxesSpecification {
-            message: "Internal error: rhs index out of bounds in contraction"
-                .to_string(),
-        },
+    CausalTensorError::InvalidOperation(
+        "Internal error: rhs index out of bounds in contraction".to_string(),
     )
 })?;

• Apply / Chat

Improve error diagnostics by including the actual index and tensor shape in the
error message for out-of-bounds access.

deep_causality_tensor/src/types/cpu_tensor/ops/tensor_ein_sum/ein_sum_impl.rs [289-290]

-"Internal error: lhs index out of bounds in contraction".to_string()
+format!(
+    "lhs index {:?} out of bounds for shape {:?}",
+    &lhs_index, lhs.shape()
+)

[To ensure code accuracy, apply this suggestion manually]