Update README with topology replay screenshot and new feature list

Author: deacon-mp

README.md

@@ -2,16 +2,31 @@
 
 A Caldera plugin: https://github.com/mitre/caldera
 
-Debrief is a plugin for gathering overall campaign information and analytics for 
-operations. It provides a centralized view of operation metadata, graphical displays of the operation, 
-the techniques and tactics used, and the facts discovered by the operation. The plugin additionally 
-supports the export of campaign information and analytics in PDF format.
+Debrief is a plugin for gathering overall campaign information and analytics for
+operations. It provides a centralized view of operation metadata, network topology
+visualization with replay, the techniques and tactics used, and the facts discovered
+by the operation. The plugin additionally supports the export of campaign information
+and analytics in PDF format.
 
-Example generated PDF for an operation with both successful and unsuccessful steps: [Caldera Debrief Report](docs/Demo-Operation_Debrief_Example.pdf)
+## Network Topology Replay
+
+Interactive network topology visualization with progressive replay of operation steps,
+subnet grouping, pivot point indicators, and discovered host enumeration.
+
+![Topology Replay](docs/TopologyReplay.png)
+
+## Features
+
+- **Network Topology Canvas** — Horizontal subnet columns with OS-specific host icons, pivot indicators, and discovered host visualization
+- **Operation Replay** — Progressive reveal of hosts and network paths as the operation unfolds, with beacon callback animation
+- **Slide-out Host Detail** — Click any host to see steps executed, facts collected, and gathered intel
+- **PDF Report Generation** — Export campaign analytics including topology, statistics, agents, TTPs, and detection strategies
+- **ATT&CK v18 Detection Mapping** — Maps operation techniques to MITRE ATT&CK v18 detection strategies and analytics
+- **Dark Theme UI** — Styled tables and cards matching Caldera's purple theme
+
+## Legacy Views
 
 ![Operation Overview](docs/DebriefOverview.png)
-![Attack Path Graph](docs/AttackPathGraph.png)
-![Tactics Graph](docs/TacticsGraph.png)
-![Steps Table](docs/StepsTable.png)
 ![Tactics and Techniques Table](docs/TacticsAndTechniquesTable.png)
-![Facts Graph](docs/FactsGraph.png)
+
+Example generated PDF: [Caldera Debrief Report](docs/Demo-Operation_Debrief_Example.pdf)