diff --git a/governance/operations/collapse-archived.sh b/governance/operations/collapse-archived.sh
new file mode 100644
index 0000000..d3bc05c
--- /dev/null
+++ b/governance/operations/collapse-archived.sh
@@ -0,0 +1,103 @@
+#!/usr/bin/env bash
+# Unarchive all 24 archived repos and fold each into the perfops monorepo under
+# archive/<repo>/ via git subtree (history-preserved). Sources are LEFT ACTIVE
+# (unarchived) afterwards — no re-archive, no delete.
+#
+# Runs entirely with gh + git in YOUR shell (the MCP integration cannot
+# unarchive or subtree-merge repos). Dry-run by default.
+#
+# Phases:
+#   1. unarchive every source            (gh repo unarchive)
+#   2. git subtree add -> perfops/archive/<repo>/
+#   3. push branch + open one draft PR on perfops
+#
+# Usage:
+#   ./collapse-archived.sh            # dry-run plan
+#   ./collapse-archived.sh --apply    # execute
+#   SEED=perfops-platform ./collapse-archived.sh --apply   # if not renamed yet
+set -euo pipefail
+OWNER="${OWNER:-muntianus}"
+SEED="${SEED:-perfops}"            # the monorepo (formerly perfops-platform)
+APPLY=false
+for a in "$@"; do [ "$a" = "--apply" ] && APPLY=true; done
+GH="https://github.com/$OWNER"
+WORKDIR="${WORKDIR:-$PWD/.collapse-archived}"
+
+log(){ printf '\033[0;36m[arch]\033[0m %s\n' "$*"; }
+warn(){ printf '\033[0;33m[arch:warn]\033[0m %s\n' "$*" >&2; }
+die(){ printf '\033[0;31m[arch:err]\033[0m %s\n' "$*" >&2; exit 1; }
+command -v gh  >/dev/null || die "gh not found"
+command -v git >/dev/null || die "git not found"
+gh auth status >/dev/null 2>&1 || die "run: gh auth login"
+$APPLY || log "DRY-RUN (default). Add --apply to execute."
+
+# All 24 archived repos. Each is folded into perfops/archive/<repo>/.
+ARCHIVED=(
+  platform perfops-gateway perfops-ingest reportkit perfops-sdk
+  perfops-templates iac-monitoring-agent awesome-performance-engineering
+  telegram-reminder old-telegram-reminder old-globex
+  office office-workspace agent-control-office portfolio
+  krave-loadtest load-krave k6-nagibator2000 ragus-loader
+  tools pybot automation-stack ig-unfollow claude-agents
+)
+
+# ---- Phase 1: unarchive (leave them active afterwards) ----
+for src in "${ARCHIVED[@]}"; do
+  if $APPLY; then
+    log "unarchive $OWNER/$src"
+    gh repo unarchive "$OWNER/$src" --yes 2>/dev/null || warn "unarchive $src skipped"
+  else
+    printf '  PLAN unarchive %s\n' "$src"
+  fi
+done
+
+# ---- Phase 2: subtree-merge each into perfops/archive/<repo>/ ----
+branch="collapse/absorb-archived-$(date +%Y%m%d)"
+if $APPLY; then
+  rm -rf "$WORKDIR"; mkdir -p "$WORKDIR"
+  log "clone monorepo $OWNER/$SEED"
+  git clone -q "$GH/$SEED.git" "$WORKDIR/$SEED"
+  cd "$WORKDIR/$SEED"
+  git checkout -q -b "$branch"
+fi
+
+for src in "${ARCHIVED[@]}"; do
+  dest="archive/$src"
+  db="$(gh api "/repos/$OWNER/$src" --jq '.default_branch' 2>/dev/null || echo main)"
+  if ! $APPLY; then
+    printf '  PLAN subtree %-32s -> %s/%s (branch %s)\n' "$src" "$SEED" "$dest" "$db"
+    continue
+  fi
+  if git cat-file -e "HEAD:$dest" 2>/dev/null; then
+    warn "$dest already exists — skipping $src"
+    continue
+  fi
+  log "subtree $src ($db) -> $SEED/$dest"
+  git remote add "s-$src" "$GH/$src.git" 2>/dev/null || true
+  # One failed source must not abort the whole run; record and continue.
+  if git fetch -q "s-$src" "$db" 2>/dev/null &&
+     git subtree add --prefix="$dest" "s-$src" "$db" \
+       -m "absorb archived $src into $dest (history-preserved)"; then
+    :
+  else
+    warn "subtree-merge $src@$db failed — skipping (other repos continue)"
+  fi
+  git remote remove "s-$src" 2>/dev/null || true
+done
+
+# ---- Phase 3: push + open one draft PR ----
+if $APPLY; then
+  git push -q -u origin "$branch"
+  # Resolve base branch locally (no extra API round-trip).
+  base_branch="$(git rev-parse --abbrev-ref origin/HEAD 2>/dev/null | cut -d/ -f2-)"
+  gh pr create --repo "$OWNER/$SEED" \
+    --base "${base_branch:-main}" \
+    --head "$branch" --draft \
+    --title "absorb all archived repos into archive/ (history-preserved)" \
+    --body "git-subtree merge of all 24 archived repos into archive/<repo>/. Full history preserved. Sources were unarchived and left active per request." \
+    || warn "PR create skipped (may already exist)"
+  log "Done. Sources were unarchived and LEFT ACTIVE (no re-archive, no delete)."
+  log "Review and merge the draft PR on $OWNER/$SEED."
+else
+  log "DRY-RUN complete. Re-run with --apply to execute."
+fi