docs: update README with intelligence features summary

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -11,6 +11,9 @@ FABRIC tails NEEDLE's logging output and renders it in real-time. It answers:
 - What is each worker doing right now?
 - What events are happening across all workers?
 - Which workers are active, idle, or erroring?
+- Is any worker stuck or looping?
+- Are workers colliding on the same files?
+- How much is this costing?
 
 ## Display Modes
 
@@ -42,13 +45,30 @@ fabric web
 
 FABRIC reads from `~/.needle/logs/` by default.
 
+## Intelligence Features
+
+Beyond simple log display, FABRIC provides:
+
+| Feature | Description |
+|---------|-------------|
+| **Stuck & Loop Detection** | Automatic alerts when workers spin their wheels |
+| **Inline Diff View** | See actual code changes, not just "Edit was called" |
+| **Cross-Reference Links** | Click any bead, file, or worker to navigate |
+| **Collision Detection** | Know when workers edit the same files |
+| **Session Replay** | Scrub through past sessions like a video |
+| **Smart Error Grouping** | Errors with context, not scattered through logs |
+| **Command Palette** | Ctrl+K for universal search and commands |
+| **Cost Tracking** | Real-time token usage and budget alerts |
+| **Task Dependency DAG** | Visual graph of task relationships |
+| **File Heatmap** | See where all the action is at a glance |
+
 ## Relationship to NEEDLE
 
 ```
-NEEDLE (orchestrates workers) → logs → FABRIC (displays activity)
+NEEDLE (orchestrates workers) → logs → FABRIC (displays + analyzes)
 ```
 
-NEEDLE does the work. FABRIC shows you what's happening.
+NEEDLE does the work. FABRIC shows you what's happening and helps you understand it.
 
 ## Status