Captured 2026-10-12 after two successful runs of the supplied exercise.
Build platform: linux/arm64 on Docker Desktop, macOS ARM64.
Other architectures and emulation were not tested.
Base: ros:jazzy-ros-base@sha256:066420e07f60aa18262f2479981def87ebcfcec42eefb0c0c57c4a46098348ca
Local image tag: dustin-slam-toolbox-lesson:jazzy
Pinned mapper Debian package: 2.8.5-1noble.20260916.104732
Other apt dependencies resolve at build time; this is not a complete package snapshot.
The minimal binary package installation added approximately 975 MB before Docker build/export overhead.
Runtime external network: none. ROS participants still communicate inside the container.
RMW_IMPLEMENTATION=rmw_fastrtps_cpp
ROS_DOMAIN_ID=75 for missing-laser-tf; 76 for complete-tf

Verification:
- Two complete final runs passed the finite missing-frame and repaired-map cases.
- Existing-output protection refused the target before writing; all 18 artifact hashes unchanged.
- Independent review checked ray endpoints, occupied-cell distances, probe geometry,
  final pose/TF composition, and every exported PGM pixel against the saved grid.
- reference-map.json and reference-report.json are copied from final-1.
- The two final grids happened to match byte-for-byte; identical future results are not promised.
- No real robot, real sensor, navigation, drift-recovery, or loop-closure result is claimed.

Captured container metadata and package versions:
PRETTY_NAME="Ubuntu 24.04.5 LTS"
NAME="Ubuntu"
VERSION_ID="24.04"
VERSION="24.04.5 LTS (Noble Numbat)"
VERSION_CODENAME=noble
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=noble
LOGO=ubuntu-logo
aarch64
Python 3.12.3
libboost1.83-dev:arm64	1.83.0-2.1ubuntu3.2
libceres4t64:arm64	2.2.0+dfsg-4.1ubuntu2
ros-jazzy-nav-msgs	5.3.8-1noble.20260902.123754
ros-jazzy-rclcpp	28.1.22-1noble.20260902.143108
ros-jazzy-rclpy	7.1.12-1noble.20260902.143245
ros-jazzy-rmw-fastrtps-cpp	8.4.4-1noble.20260902.140744
ros-jazzy-sensor-msgs	5.3.8-1noble.20260902.133401
ros-jazzy-slam-toolbox	2.8.5-1noble.20260916.104732
ros-jazzy-tf2-ros	0.36.22-1noble.20260902.154805