GSoC 2026 Weekly Update: Week 10 - Catching Up, Zero-PII Refinements, and Anomaly Correlation

 Week 10 has been an intensive and rewarding push. After the setback of falling sick during Week 9, the priority for this week was catching up on our schedule, finalizing outstanding milestones, and locking down the core features for login anomaly detection and remediation playbooks.

With steady guidance and feedback from my mentors, we were able to bridge the gap, wrap up our initial exposure pipeline tasks, and officially get all the development work through Week 8 reviewed and merged into the main repository.

Zero-PII by Design: Re-evaluating Telemetry

One of the most important architectural discussions this week centered on our privacy model. Following review discussions with our project maintainers, we reinforced the core philosophy of BLT-Vanish: absolute zero-PII (Personally Identifiable Information) and zero unnecessary data transmission.

Because all sensitive user context and risk analysis must remain strictly on the user's local device without external tracking, we made the deliberate decision to strip out telemetry services entirely. Every design choice in this project is anchored in user privacy, and removing telemetry ensures that no diagnostic or usage footprints inadvertently leave the client environment.

Merged Foundations and Completing the Exposure Pipeline

With the telemetry refactoring in place, we finalized the Week 9 deliverables and integrated them into our codebase:

• Repository Merge: Successfully merged the complete backlog through Week 8 into the repository, ensuring the credential vault, build fixes, and triage UI are fully unified.

• Exposure Intelligence: Finished wiring up the Have I Been Pwned (HIBP) integration logic using privacy-safe k-anonymity protocols and HMAC-SHA256 client-side matching, keeping credentials and query identifiers protected.

Diving into Week 10: Login Anomalies and Response Playbooks

With the previous milestones closed, the development focus shifted directly into the Week 10 roadmap—building intelligence around suspicious logins and automated response playbooks:

• Heuristic Anomaly Detection: Implemented the login anomaly service to evaluate variance across location, device signatures, and unusual time patterns.

• Cross-Signal Risk Correlation: Built correlation logic to join login anomaly scores with existing phishing and credential threat signals, providing a comprehensive view of account risk.

• Actionable Playbooks: Formatted structured response playbooks (such as step-by-step guidance for session revocation, MFA resets, and prioritized password rotation) to guide users through immediate containment steps.

• UI Explainability: Added explainability chips directly into the Security Center interface to give clear, transparent context behind why an anomaly was flagged.

Looking Ahead

With the anomaly correlation engine and playbooks scaffolded, the core feature set of the project is nearing completion. Moving into the final stretch of the summer, the focus will turn to end-to-end regression testing, cross-module consistency passes, and preparing the final documentation and release package for maintainer handover.