docs: start milestone v1.2 Extended Protocol Coverage

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/PROJECT.md

@@ -46,7 +46,7 @@ All 16 v1.0 requirements + 11 v1.1 requirements validated. Full pipeline with cu
 
 ### Active
 
-(No active requirements — next milestone not yet defined)
+(See REQUIREMENTS.md for v1.2 requirements)
 
 ### Out of Scope
 
@@ -92,6 +92,18 @@ All 16 v1.0 requirements + 11 v1.1 requirements validated. Full pipeline with cu
 | LoadResult struct over tuple return | Clean single return value, extensible for future fields | Good |
 | --print-config as flag (not subcommand) | Consistent with --list-interfaces pattern, simpler CLI surface | Good |
 
+## Current Milestone: v1.2 Extended Protocol Coverage
+
+**Goal:** Expand traffic classification with grouped protocol families that share recognizable sound signatures
+
+**Target features:**
+- Research common network protocols and identify missing ones beyond the current 10
+- Group related protocols into families (Mail, Web, Remote Access, Database, Discovery, File Transfer, VoIP)
+- Within-group sound design: shared base frequency, different waveforms or slight detuning
+- Frequency rebalancing to accommodate new classes without overcrowding the spectrum
+- New classification rules for all identified protocols
+- Updated --print-config output reflecting groups
+
 ## Shipped Milestones
 
 <details>
@@ -127,4 +139,4 @@ This document evolves at phase transitions and milestone boundaries.
 4. Update Context with current state
 
 ---
-*Last updated: 2026-03-26 after v1.1 milestone*
+*Last updated: 2026-03-27 after v1.2 milestone start*