Phase 4: RAM-disk boot, recipe catalog, collision validation

L1: Add make qemu-ram target — copies disk image to host tmpfs before
    QEMU boots, eliminating host disk I/O during OS runtime.
    Usage: make qemu-ram CONFIG_NAME=redbear-full QEMU_MEM=12288

L2: Create local/recipes/AGENTS.md — comprehensive catalog of all 165
    custom recipes across 15 categories with descriptions.

L3: CollisionTracker already fully implemented and wired into installer
    (recipes/core/installer/source/src/collision.rs, 267 lines).

L4: Add scripts/validate-collision-log.sh to make validate target —
    scans build logs for [COLLISION-ERROR]/[COLLISION-WARN] markers
    from the runtime CollisionTracker.

scripts/validate-collision-log.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# validate-collision-log.sh — Check build output for CollisionTracker findings
+#
+# Scans the build directory for any log files containing CollisionTracker
+# output ([COLLISION-ERROR] or [COLLISION-WARN] markers). The runtime
+# CollisionTracker runs during image assembly in redox_installer.
+#
+# Exit codes:
+#   0 — No collision errors found
+#   1 — Collision errors detected
+
+set -euo pipefail
+
+build_dir="${1:?Usage: validate-collision-log.sh <build-dir>}"
+
+errors=0
+warnings=0
+
+if [ -d "$build_dir" ]; then
+    while IFS= read -r logfile; do
+        file_errors=$(grep -c '\[COLLISION-ERROR\]' "$logfile" 2>/dev/null || true)
+        file_warnings=$(grep -c '\[COLLISION-WARN\]'  "$logfile" 2>/dev/null || true)
+        if [ "$file_errors" -gt 0 ] || [ "$file_warnings" -gt 0 ]; then
+            echo "  $logfile: $file_errors error(s), $file_warnings warning(s)"
+            errors=$((errors + file_errors))
+            warnings=$((warnings + file_warnings))
+        fi
+    done < <(find "$build_dir" -name '*.log' -type f 2>/dev/null)
+fi
+
+echo "=== CollisionTracker log validation ==="
+echo "  Errors: $errors, Warnings: $warnings"
+
+if [ "$errors" -gt 0 ]; then
+    echo "FAILED: $errors collision error(s) in build logs" >&2
+    echo "  The CollisionTracker detected init service or environment file collisions." >&2
+    echo "  Fix: Move config [[files]] init services from /usr/lib/init.d/ to /etc/init.d/" >&2
+    exit 1
+fi
+
+if [ "$warnings" -gt 0 ]; then
+    echo "WARN: $warnings non-critical collision(s) detected (not blocking)"
+fi
+
+echo "PASSED: No collision errors"