Oliver Kieselbach
258f18d3dd
Medium — SignalSerializer.Deserialize coerced JSON null values inside
TypedPayload to string.Empty, breaking wire/replay parity for the new
single-rail path. The comment promised "cast null tokens to null objects"
but the code did the opposite.
Realistic producers like DeviceInfoCollector place nullable fields (e.g.
displayVersion returned by GetOsDisplayVersion() when the registry key
is absent) directly into EnrollmentEvent.Data. Live Newtonsoft emits
{"displayVersion":null}; under the pre-fix deserializer, replay turned
that into {"displayVersion":""} on the next outbound Emit.
Fix: preserve JSON null as C# null when restoring TypedPayload dict
entries. Dictionary<string, object> accepts null values at runtime and
Newtonsoft re-serializes them as JSON null — wire-parity restored.
Other JToken types (JValue non-null, JArray, JObject) continue to pass
through unchanged.
Regression test: SignalSerializer_roundtrip_null_value_in_TypedPayload_stays_null_not_empty_string
- on-disk JSON contains "displayVersion":null (not "")
- restored dict carries C# null (not "")
- re-serialized restored dict still emits JSON null (wire-parity)
- sibling non-null values untouched
Tests: 567 V2.Core + 112 DecisionCore green (+1 new regression test).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Autopilot Monitor
Advanced monitoring and troubleshooting solution for Windows Autopilot deployments. Gain full visibility into every enrollment session with a detailed event timeline, fleet health dashboards, and session reporting. Define custom analysis rules to automatically detect issues and gather rules to collect targeted evidence. Retrieve diagnostics packages on demand, configure agent settings like auto-reboot behavior and automatic timezone adjustment — all managed centrally from the web dashboard.
Private Preview
Autopilot Monitor is currently running as a Private Preview. Visit autopilotmonitor.com to request access and learn more.
Overview
Autopilot Monitor provides real-time tracking, intelligent diagnostics, and automated troubleshooting for Windows Autopilot enrollment processes. It consists of:
- Bootstrap Script — PowerShell script deployed via Intune that starts monitoring early in the enrollment process
- Monitoring Agent — Lightweight .NET application that collects telemetry and evidence during enrollment
- Backend API — Azure Functions-based ingestion and processing pipeline
- Web Dashboard — Next.js application for real-time monitoring and fleet analytics
Architecture
For detailed information about the system architecture, components, and data flow, see Architecture Documentation.
Documentation
Full documentation is available at autopilotmonitor.com/docs
License
This project uses a split licensing model:
- MIT License — Agent (
src/Agent/) and Shared library (src/Shared/) — unrestricted use on end-user devices - AGPL-3.0 — Backend (
src/Backend/), Web Dashboard (src/Web/), and MCP Server (src/McpServer/) — server-side components remain open source
See LICENSE for full details.