docs: move PRD.md and SDLC.md to docs/ subdirectory

Consolidate all documentation files under docs/ directory.
Update AGENTS.md and README.md to reflect new file locations.

💘 Generated with Crush

Assisted-by: GLM-5 via Crush <crush@charm.land>

README.md

@@ -4,7 +4,7 @@
 
 ### 🚀 Quick Start
 1. **AGENTS.md** - Current status + critical requirements (START HERE)
-2. **PRD.md** - Product Requirements Document
+2. **docs/PRD.md** - Product Requirements Document
 3. **README.md** - This file (project overview)
 
 ### 📋 Documentation Files
@@ -13,7 +13,8 @@
 | **STATUS.md** | 📊 Project status report (manager quick-glance) |
 | **JOURNAL.md** | 📝 AI memory, ADRs, lessons learned (append-only) |
 | **AGENTS.md** | ⚡ START HERE - Current status + requirements |
-| **PRD.md** | Complete product requirements |
+| **docs/PRD.md** | Complete product requirements |
+| **docs/SDLC.md** | Software Development Lifecycle |
 | **docs/TEST-COVERAGE.md** | Test suite details and coverage |
 | **docs/VERIFICATION-REPORT.md** | Security compliance verification |
 
@@ -139,7 +140,8 @@ Build KNEL-Football secure ISO with Docker-only workflow following AGENTS.md req
 README.md (Main Entry Point)
   ├── ⚠️ READ THESE FILES FIRST
   │   ├── AGENTS.md (START HERE - Current Status)
-  │   ├── PRD.md (Requirements)
+  │   ├── docs/PRD.md (Requirements)
+  │   ├── docs/SDLC.md (Development Workflow)
   │   ├── docs/TEST-COVERAGE.md (Test Details)
   │   └── docs/VERIFICATION-REPORT.md (Verification Results)
   ├── Quick Commands
@@ -157,7 +159,6 @@ README.md (Main Entry Point)
 football/
 ├── AGENTS.md              # START HERE - Agent guidelines
 ├── README.md              # This file
-├── PRD.md                # Product Requirements
 ├── Dockerfile             # Build environment
 ├── run.sh                # Main entry point
 ├── config/                # Live-build configuration
@@ -177,6 +178,8 @@ football/
 │   ├── security/         # Security compliance tests
 │   └── test_helper/      # Test utilities
 ├── docs/                  # Detailed documentation
+│   ├── PRD.md            # Product Requirements
+│   ├── SDLC.md           # Software Development Lifecycle
 │   ├── TEST-COVERAGE.md
 │   └── VERIFICATION-REPORT.md
 ├── output/                # ISO artifacts (ISO, checksums)
@@ -191,8 +194,9 @@ football/
 
 **Before Making Changes**:
 1. Read AGENTS.md (current status, requirements)
-2. Read PRD.md (detailed requirements)
-3. Review docs/TEST-COVERAGE.md (test details)
+2. Read docs/PRD.md (detailed requirements)
+3. Read docs/SDLC.md (development workflow)
+4. Review docs/TEST-COVERAGE.md (test details)
 
 **Making Changes**:
 1. Read files before editing (Critical!)
@@ -320,6 +324,7 @@ License: GNU Affero General Public License v3.0 only
 
 **For detailed information, see:**
 - AGENTS.md (START HERE)
-- PRD.md (Requirements)
+- docs/PRD.md (Requirements)
+- docs/SDLC.md (Development Workflow)
 - docs/TEST-COVERAGE.md (Tests)
 - docs/VERIFICATION-REPORT.md (Compliance)