fix: proactive documentation and sprint planning automation

- doc-guardian: Hook now tracks documentation dependencies and outputs
  specific files needing updates (e.g., commands → COMMANDS-CHEATSHEET.md)
- projman: SessionStart hook now suggests /sprint-plan when open issues
  exist without milestone, and warns about unreleased CHANGELOG entries
- projman: Add /suggest-version command for semantic version recommendations
- docs: Update COMMANDS-CHEATSHEET.md with data-platform plugin (was missing)
- docs: Update CLAUDE.md with data-platform and version 4.0.0

Fixes documentation drift and lack of proactive workflow suggestions.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/doc-guardian/hooks/notify.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 # doc-guardian notification hook
-# Outputs a single notification for config file changes, nothing otherwise
+# Tracks documentation dependencies and queues updates
 # This is a command hook - guaranteed not to block workflow
 
 # Read tool input from stdin (JSON with file_path)
@@ -14,10 +14,45 @@ if [ -z "$FILE_PATH" ]; then
     exit 0
 fi
 
-# Check if file is in a config directory (commands/, agents/, skills/, hooks/)
-if echo "$FILE_PATH" | grep -qE '/(commands|agents|skills|hooks)/'; then
-    echo "[doc-guardian] Config file modified. Run /doc-sync when ready."
+# Define documentation dependency mappings
+# When these directories change, these docs need updating
+declare -A DOC_DEPS
+DOC_DEPS["commands"]="docs/COMMANDS-CHEATSHEET.md README.md"
+DOC_DEPS["agents"]="README.md CLAUDE.md"
+DOC_DEPS["hooks"]="docs/COMMANDS-CHEATSHEET.md README.md"
+DOC_DEPS["skills"]="README.md"
+DOC_DEPS[".claude-plugin"]="CLAUDE.md .claude-plugin/marketplace.json"
+DOC_DEPS["mcp-servers"]="docs/COMMANDS-CHEATSHEET.md CLAUDE.md"
+
+# Check which config directory was modified
+MODIFIED_TYPE=""
+for dir in commands agents hooks skills .claude-plugin mcp-servers; do
+    if echo "$FILE_PATH" | grep -qE "/${dir}/|^${dir}/"; then
+        MODIFIED_TYPE="$dir"
+        break
+    fi
+done
+
+# Exit silently if not a tracked config directory
+if [ -z "$MODIFIED_TYPE" ]; then
+    exit 0
 fi
 
-# Exit silently for all other files (no output = no blocking)
+# Get the dependent docs
+DEPENDENT_DOCS="${DOC_DEPS[$MODIFIED_TYPE]}"
+
+# Queue file for tracking pending updates
+QUEUE_FILE="${CLAUDE_PROJECT_ROOT:-.}/.doc-guardian-queue"
+
+# Add to queue (create if doesn't exist, append if does)
+{
+    echo "$(date +%Y-%m-%dT%H:%M:%S) | $MODIFIED_TYPE | $FILE_PATH | $DEPENDENT_DOCS"
+} >> "$QUEUE_FILE" 2>/dev/null || true
+
+# Count pending updates
+PENDING_COUNT=$(wc -l < "$QUEUE_FILE" 2>/dev/null | tr -d ' ' || echo "1")
+
+# Output notification with specific docs that need updating
+echo "[doc-guardian] $MODIFIED_TYPE changed → update needed: $DEPENDENT_DOCS (${PENDING_COUNT} pending)"
+
 exit 0