Three-tier constraint model, mode-aware eval, boundary examples, playtest tooling

Eval harness:
- Mode-aware scoring: sudo=strict (exact match), pray/god=soft (category match,
  in-character, appropriate intensity)
- New metrics: cmd_category_match, appropriate_intensity, scoring_mode breakdown
- Eval defaults to steel141 (192.168.0.141) — prod GPU reserved for serving

Dataset (213 examples):
- Added 31 boundary/adversarial examples (safety edges, abstention, near-boundary)
- Updated pray example reasoning: character-driven logic, not prescriptive outputs
- Tagged pray examples with scoring_mode=soft

Playtest tooling:
- whitelist.sh: add/remove/list across all 3 servers
- FRIENDS_INVITE.md + Discord version: playtester recruitment docs
- Server addresses and implementation details for both training servers

PLAN.md:
- Three-tier constraint model documented (sudo/pray/god_system)
- Success criteria split by scoring mode
- All session decisions logged

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

whitelist.sh

@@ -0,0 +1,53 @@
+#!/bin/bash
+# Manage whitelists across all Minecraft servers on CT 644
+# Usage: ./whitelist.sh add <username>
+#        ./whitelist.sh remove <username>
+#        ./whitelist.sh list
+
+ACTION="$1"
+PLAYER="$2"
+
+SERVERS=(
+    "mc1|25575|REDACTED_RCON"
+    "shrink-world|25576|REDACTED_RCON"
+    "paper-ai|25577|REDACTED_RCON"
+)
+
+rcon_cmd() {
+    local port="$1" pass="$2" cmd="$3"
+    ssh pve112 "pct exec 644 -- python3 -c \"
+from mcrcon import MCRcon
+with MCRcon('localhost', '$pass', port=$port) as r:
+    print(r.command('$cmd'))
+\"" 2>/dev/null
+}
+
+case "$ACTION" in
+    add)
+        [ -z "$PLAYER" ] && echo "Usage: $0 add <username>" && exit 1
+        for s in "${SERVERS[@]}"; do
+            IFS='|' read -r name port pass <<< "$s"
+            echo -n "$name: "
+            rcon_cmd "$port" "$pass" "whitelist add $PLAYER"
+        done
+        ;;
+    remove)
+        [ -z "$PLAYER" ] && echo "Usage: $0 remove <username>" && exit 1
+        for s in "${SERVERS[@]}"; do
+            IFS='|' read -r name port pass <<< "$s"
+            echo -n "$name: "
+            rcon_cmd "$port" "$pass" "whitelist remove $PLAYER"
+        done
+        ;;
+    list)
+        for s in "${SERVERS[@]}"; do
+            IFS='|' read -r name port pass <<< "$s"
+            echo -n "$name: "
+            rcon_cmd "$port" "$pass" "whitelist list"
+        done
+        ;;
+    *)
+        echo "Usage: $0 {add|remove|list} [username]"
+        exit 1
+        ;;
+esac