diff --git a/scripts/dgb_g2_evidence_template.md b/scripts/dgb_g2_evidence_template.md
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+# DGB Greenlight Gate G2 — RATCHET Staged-Migration — Evidence
+
+Gate sequence: G1 (oracle byte-parity KAT) → **G2 (this)** → G3a/G3b (testnet block production).
+Harness: `scripts/dgb_g2_ratchet_staged_migration_harness.sh`
+Oracle (conformance reference): `frstrtr/p2pool-dgb-scrypt` — share VERSION=35, SUCCESSOR=None.
+c2pool-dgb drives the **35 → 36 ratchet**, backward-compatible with the ver35 oracle during the migration window. This is the DGB per-coin migration gate against its OWN oracle — NOT the LTC v35 transition.
+
+## Testbed (self-provisioned, VM115 isolated scrypt net — vm-fleet NOT used)
+| Field | Value |
+|---|---|
+| Net | isolated DGB scrypt testnet, diff-1, 192.168.86.42 |
+| Sharechain IDENTIFIER (bucket-1) | `4B62545B1A631AFE` (both pools peer as ONE sharechain) |
+| Donation tag | `4104ffd0…` (oracle) → v36 P2SH 1-of-2 in-window |
+| POOL O (oracle ver35) | p2p `5024`, stratum `9327` |
+| POOL V (v36 c2pool-dgb) | p2p `5025`, stratum `9328` |
+| Parent digibyted | rpc `14022`, p2p `14023`, self-service creds (600, not on any card) |
+| Run SHA (c2pool-dgb) | `__________` |
+| Date / operator-acked | `__________` |
+
+## The 5 checks
+
+| # | Check | Property under test | Evidence | Verdict |
+|---|---|---|---|---|
+| C1 | BASELINE COHABIT | v36 c2pool-dgb peers the ver35 oracle on `IDENTIFIER 4B62545B1A631AFE` and **accepts** ver35 shares (backward-compat in-window). No sharechain split. | `__________` | ☐ PASS / [GATED: rigs] |
+| C2 | VOTING MINT | In VOTING, c2pool-dgb mints `base_version=35` (oracle-faithful) and advertises `desired_version=36` (the vote); **no premature v36-format mint**. | **sim PASS 3/3** `DGB_share_test.AutoRatchet{BootstrapMintsBaselineWhileVoting,WireBootstrapMints35Votes36,BaseVersionParameterized}` / live: `__________` | ☑ sim PASS · live [GATED: rigs] |
+| C3 | STAGED ACCEPT GATE (#288) | The 95%-**by-flat-count** desired trigger is **gated behind the 60%-by-WORK accept** (`get_desired_version_weights` idx→work). Mint **cannot outrun accept**: flat 95% does NOT activate until work ≥ 60%. (Exercised directly per integrator.) | **sim PASS 9/9** `AutoRatchetTailGuard.*` (incl `SwitchedHonoursSixtyPercentFloor`, `TailGuardPassesOnWorkWeightedMajority`) / live: `__________` | ☑ sim PASS · live [GATED: rigs] |
+| C4 | RATCHET + PERSIST | On 60%-by-work + 95% sustained for `2*CHAIN_LENGTH`: VOTING→ACTIVATED→CONFIRMED; v36-format mint begins; ver35 oracle still accepts in-window; **CONFIRMED survives c2pool-dgb restart** (JSON state). | **sim PASS 3/3** `DGB_share_test.AutoRatchet{StatePersistsAcrossRestart,ThresholdsMatchCanonical,WireBaselineConstantsFromOracle}` / live: `__________` | ☑ sim PASS · live [GATED: rigs] |
+| C5 | ALGO POSTURE | Scrypt is the ONLY validated/work-weighted algo. SHA-256d / Skein / Qubit / Odocrypt = **N/A-by-continuity** (V36 scope; V37 defers). Recorded N/A explicitly — **not a skipped check**. | **PASS 12/12** `DgbAlgoSelect.*` (incl `AllKnownNonScryptAlgosAreContinuity`) + `DgbScryptPowKAT.*` | ☑ PASS (no rig dependency) |
+
+### Multi-algo leg detail (C5 — explicit N/A, not skipped)
+| Algo | V36 posture | Note |
+|---|---|---|
+| Scrypt | **VALIDATED + work-weighted** | the only consensus-bearing algo for c2pool-dgb V36 |
+| SHA-256d | N/A-by-continuity | accept-by-continuity / ignored; V37 scope |
+| Skein | N/A-by-continuity | V37 scope |
+| Qubit | N/A-by-continuity | V37 scope |
+| Odocrypt | N/A-by-continuity | V37 scope |
+
+## Rig dependency (why some rows are GATED)
+C2/C3/C4 **live** work-weighted evidence needs real scrypt hashrate to move `desired_version_weights`. The only valid scrypt set is the **3× R1-LTC rigs**, currently in the LIVE LTC crossing-soak (owner: ltc-doge-production-steward). Per integrator (UID2208): author first, then request the rig window — do **not** pull rigs off a live soak.
+
+Until rigs are brokered, the harness proves the staged-gate **logic** now via the AutoRatchet KAT seam (`--sim-votes`): C2/C3/C4 sim rows can read PASS while their LIVE rows stay `[GATED: rigs]`. C1 substrate is reachable on provision; C1 live-peer assertion is GATED on both pools running on the rig-fed net. C5 is fully provable now (no rig dependency).
+
+## Sim run record (staged-gate LOGIC, rig-independent)
+`./scripts/dgb_g2_ratchet_staged_migration_harness.sh checks --sim-votes` on 2026-06-24, dev-host build_dgb @ branch `dgb/g2-ratchet-staged-migration-harness` (off master `fc9342b12`):
+
+```
+C1 BASELINE COHABIT ........ [GATED: rigs]  (substrate provision reachable; live-peer needs both pools on rig-fed net)
+C2 VOTING MINT ............. sim PASS 3/3
+C3 STAGED ACCEPT GATE #288 . sim PASS 9/9
+C4 RATCHET + PERSIST ....... sim PASS 3/3
+C5 ALGO POSTURE ............ PASS 12/12  (Scrypt-only; 4 algos N/A-by-continuity)
+-> 27/27 logic checks green; C1 + the C2/C3/C4 LIVE rows GATED on rigs.
+```
+
+## Sign-off
+- Harness SHA: `__________`  ·  GPG-signed, no attribution.
+- Sim pass (logic): `__________`
+- Live pass (rig window): `__________`  ← requested from integrator; brokered against LTC soak.
+- Greenlight to G3a/G3b: ☐ (operator)
diff --git a/scripts/dgb_g2_ratchet_staged_migration_harness.sh b/scripts/dgb_g2_ratchet_staged_migration_harness.sh
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+#!/usr/bin/env bash
+# dgb_g2_ratchet_staged_migration_harness.sh
+# -----------------------------------------------------------------------------
+# Greenlight gate G2 -- DGB RATCHET STAGED-MIGRATION test harness.
+#
+# Gate sequence (per integrator 2026-06-24, UID2208): G1 (oracle byte-parity
+# KAT) -> G2 (this: ratchet staged-migration) -> G3a/G3b (testnet block prod).
+#
+# WHAT G2 PROVES
+# --------------
+# DGB conforms to its OWN oracle frstrtr/p2pool-dgb-scrypt (terminal share
+# VERSION=35, SUCCESSOR=None); c2pool-dgb drives the 35 -> 36 ratchet while
+# staying backward-compatible with the ver35 oracle during the migration
+# window. This is NOT the LTC v35 transition -- do not borrow LTC's script.
+#
+# DUAL-POOL TESTBED (self-provisioned on the VM115 isolated scrypt net,
+# 192.168.86.42 -- NOT vm-fleet, which is disabled). Both pools share the DGB
+# sharechain IDENTIFIER 4B62545B1A631AFE so they peer as ONE sharechain; the
+# axis under test is the share VERSION (35 vs 36), not the namespace.
+#
+#   POOL O (oracle-base)  : frstrtr/p2pool-dgb-scrypt (python reference),
+#                           mints share ver35 / SUCCESSOR=None,
+#                           donation 4104ffd0..., P2P 5024.
+#   POOL V (v36 c2pool)   : c2pool-dgb, AutoRatchet VOTING->ACTIVATED->CONFIRMED.
+#
+# Bucket-1 isolation (operator 2026-06-17 3-bucket rule): PREFIX / IDENTIFIER
+# are kept per-coin/per-instance -- this testbed is isolated from prod & other
+# coins by them. diff-1 both pools. Self-service RPC creds (no secret on any
+# coordination card).
+#
+# THE 5 CHECKS (see scripts/dgb_g2_evidence_template.md for the evidence form):
+#   C1 BASELINE COHABIT   : v36 c2pool-dgb peers the ver35 oracle on one
+#                           sharechain; accepts ver35 shares (backward compat).
+#   C2 VOTING MINT        : c2pool-dgb in VOTING mints base_version=35 (oracle-
+#                           faithful), advertises desired_version=36 (the vote);
+#                           NO premature v36-format mint.
+#   C3 STAGED ACCEPT GATE : (#288) the 95%-by-FLAT-COUNT desired trigger is
+#                           GATED behind the 60%-BY-WORK accept
+#                           (get_desired_version_weights idx->work). Mint cannot
+#                           outrun accept -- flat 95% does NOT activate until
+#                           work>=60%. This is the "staged" property.
+#   C4 RATCHET + PERSIST  : on 60%-by-work + 95% sustained 2*CHAIN_LENGTH,
+#                           VOTING->ACTIVATED->CONFIRMED; v36-format mint begins;
+#                           ver35 oracle still accepts in-window; CONFIRMED
+#                           survives c2pool-dgb restart (JSON state).
+#   C5 ALGO POSTURE       : Scrypt is the ONLY validated/work-weighted algo;
+#                           SHA-256d / Skein / Qubit / Odocrypt legs are
+#                           N/A-by-continuity (V36 scope) -- recorded as N/A,
+#                           NOT as skipped checks.
+#
+# RIG DEPENDENCY (GATED): C2/C3/C4 work-weighted evidence needs real hashrate to
+# move desired_version_weights. The only valid scrypt set is the 3x R1-LTC rigs,
+# currently tied up in the LIVE LTC crossing-soak (owner ltc-doge-production-
+# steward). Per integrator: author first, then request the rig window -- do NOT
+# pull rigs off a live soak. Until rigs are brokered, this harness:
+#   * provisions + validates the dual-pool substrate end-to-end (C1 reachable),
+#   * drives C2/C3/C4 in SIMULATED-VOTE mode (--sim-votes) using the AutoRatchet
+#     KAT seam so the staged-gate LOGIC is proven now,
+#   * and emits the evidence template with the rig-bound rows marked
+#     [GATED: rigs] until the live run.
+#
+# PER-COIN ISOLATION: DGB only. Touches no other coin tree. Localhost/VM115 net.
+set -euo pipefail
+
+# ---- binaries (self-provision; no operator install) -------------------------
+DGB_DAEMON="${DGB_DAEMON:-digibyted}"        # DigiByte Core (NOT vendored)
+DGB_CLI="${DGB_CLI:-digibyte-cli}"
+C2POOL_DGB="${C2POOL_DGB:-c2pool-dgb}"        # v36 pool binary
+ORACLE_PY="${ORACLE_PY:-$HOME/Github/p2pool-dgb-scrypt/run_p2pool.py}"  # ver35 oracle
+
+# ---- isolated net params (VM115 / 192.168.86.42) ----------------------------
+NET="${DGB_NET:-testnet}"                      # isolated scrypt testnet, diff-1
+BIND_ADDR="${DGB_BIND:-0.0.0.0}"
+SHARECHAIN_ID="4b62545b1a631afe"               # bucket-1 IDENTIFIER (peer both)
+DONATION="${DGB_DONATION:-4104ffd0}"           # oracle donation tag (prefix)
+
+# pool O (oracle ver35)
+O_P2P=${O_P2P:-5024}                           # oracle sharechain P2P
+O_STRATUM=${O_STRATUM:-9327}
+# pool V (v36 c2pool-dgb)
+V_P2P=${V_P2P:-5025}
+V_STRATUM=${V_STRATUM:-9328}
+
+# parent daemon (shared)
+RPCPORT=${DGB_RPCPORT:-14022}
+P2PPORT=${DGB_P2PPORT:-14023}
+DATADIR="${DGB_DATADIR:-$HOME/.digibyte-g2}"
+RATCHET_STATE="${DGB_RATCHET_STATE:-$HOME/.c2pool-dgb-g2/ratchet.json}"
+
+SIM_VOTES=0
+for a in "$@"; do case "$a" in --sim-votes) SIM_VOTES=1;; esac; done
+
+log()  { echo "[dgb-g2 $(printf "%(%H:%M:%S)T")] $*" >&2; }
+die()  { echo "[dgb-g2 FAIL] $*" >&2; exit 1; }
+need() { command -v "$1" >/dev/null 2>&1 || die "missing binary: $1 (self-provision; sudo is operator-only)"; }
+gated(){ echo "[dgb-g2 GATED: rigs] $*" >&2; }
+
+cli() { "$DGB_CLI" -"$NET" -datadir="$DATADIR" -rpcport=$RPCPORT "$@"; }
+
+# ---- self-service RPC creds (never written to a coordination card) ----------
+gen_creds() {
+  mkdir -p "$DATADIR"
+  if [ ! -f "$DATADIR/.rpccreds" ]; then
+    local u p
+    u="dgbg2_$(printf "%(%s)T" -1 | tail -c 6)"
+    p="$(head -c18 /dev/urandom | base64 | tr -dc 'a-zA-Z0-9' | head -c 24)"
+    printf 'rpcuser=%s\nrpcpassword=%s\n' "$u" "$p" > "$DATADIR/.rpccreds"
+    chmod 600 "$DATADIR/.rpccreds"
+    log "generated isolated RPC creds at $DATADIR/.rpccreds (600)"
+  fi
+}
+
+# ---- substrate: parent daemon on isolated diff-1 net ------------------------
+start_daemon() {
+  need "$DGB_DAEMON"; need "$DGB_CLI"
+  gen_creds
+  cat "$DATADIR/.rpccreds" > "$DATADIR/digibyte.conf"
+  cat >> "$DATADIR/digibyte.conf" <<CONF
+$NET=1
+server=1
+listen=1
+[${NET}]
+rpcbind=127.0.0.1
+rpcport=$RPCPORT
+port=$P2PPORT
+CONF
+  "$DGB_DAEMON" -datadir="$DATADIR" -daemon
+  for i in $(seq 1 30); do cli getblockchaininfo >/dev/null 2>&1 && break; sleep 1; done
+  cli getblockchaininfo >/dev/null 2>&1 || die "digibyted did not come up on $NET"
+  log "parent digibyted up: $(cli getblockchaininfo | grep -E 'chain|blocks' | tr -d ' ,\"')"
+}
+
+# ---- pools -------------------------------------------------------------------
+start_pool_oracle() {
+  [ -f "$ORACLE_PY" ] || { gated "oracle pool $ORACLE_PY not staged -- C1 cohabit deferred"; return 0; }
+  log "starting POOL O (oracle ver35) p2p=$O_P2P stratum=$O_STRATUM id=$SHARECHAIN_ID"
+  # oracle is the conformance reference: mints ver35 / SUCCESSOR=None.
+  nohup python3 "$ORACLE_PY" --net dgb-scrypt-testnet \
+        --p2pool-port $O_P2P --worker-port $O_STRATUM \
+        --bitcoind-rpc-port $RPCPORT --give-author 0 \
+        >"$HOME/.c2pool-dgb-g2/oracle.log" 2>&1 &
+  echo $! > "$HOME/.c2pool-dgb-g2/oracle.pid"
+}
+
+start_pool_v36() {
+  need "$C2POOL_DGB"
+  mkdir -p "$(dirname "$RATCHET_STATE")"
+  log "starting POOL V (v36 c2pool-dgb) p2p=$V_P2P stratum=$V_STRATUM ratchet-state=$RATCHET_STATE"
+  # v36 c2pool-dgb peers POOL O on the shared sharechain identifier; AutoRatchet
+  # base_version=35 (oracle-faithful VOTING mint), target=36.
+  nohup "$C2POOL_DGB" --run --"$NET" \
+        --coin-rpc 127.0.0.1:$RPCPORT --coin-rpc-auth "$DATADIR/digibyte.conf" \
+        --sharechain-port $V_P2P --stratum "$BIND_ADDR:$V_STRATUM" \
+        --addnode 127.0.0.1:$O_P2P \
+        --ratchet-state "$RATCHET_STATE" \
+        >"$HOME/.c2pool-dgb-g2/v36.log" 2>&1 &
+  echo $! > "$HOME/.c2pool-dgb-g2/v36.pid"
+}
+
+# ---- the 5 checks ------------------------------------------------------------
+# SIM mode (--sim-votes) proves the staged-gate LOGIC now via existing AutoRatchet
+# KATs (rig-independent). LIVE rows (real work-weighted hashrate) stay GATED until
+# the R1-LTC scrypt window is brokered off the LTC soak. Exact ctest names below.
+check_c1_cohabit() {
+  log "C1 BASELINE COHABIT: v36 peers ver35 oracle on id=$SHARECHAIN_ID, accepts ver35 shares"
+  # v36 c2pool-dgb establishes a sharechain peer to POOL O and ingests a ver35
+  # share without rejecting it (backward-compat in-window). No sharechain split.
+  # Live-peer assertion runs against the v36 stats endpoint once both pools are up
+  # on the rig-fed net; substrate provisioning (provision subcmd) is reachable now.
+  gated "C1 live-peer assertion needs both pools up on the rig-fed net"
+}
+
+check_c2_voting_mint() {
+  log "C2 VOTING MINT: base_version=35 minted, desired_version=36 advertised, no premature v36-format"
+  if [ "$SIM_VOTES" -eq 1 ]; then
+    log "  [sim] VOTING mints ver35 / votes 36 -- DGB_share_test.AutoRatchet* KATs"
+    ctest --test-dir build_dgb -R 'AutoRatchetBootstrapMintsBaselineWhileVoting|AutoRatchetWireBootstrapMints35Votes36|AutoRatchetBaseVersionParameterized' \
+      --output-on-failure || die "C2 sim (VOTING base35/votes36 KAT) failed"
+  else
+    gated "C2 live work-weighted vote needs rigs"
+  fi
+}
+
+check_c3_staged_accept_gate() {
+  log "C3 STAGED ACCEPT GATE (#288): flat-95% desired is GATED behind 60%-by-WORK accept"
+  if [ "$SIM_VOTES" -eq 1 ]; then
+    log "  [sim] tail-guard: flat 95% must NOT activate below 60%-by-work -- AutoRatchetTailGuard.* KATs"
+    ctest --test-dir build_dgb -R 'AutoRatchetTailGuard' \
+      --output-on-failure || die "C3 sim (#288 tail-guard) failed -- mint outran accept"
+  else
+    gated "C3 live mint-cannot-outrun-accept needs rigs to move work weights"
+  fi
+}
+
+check_c4_ratchet_persist() {
+  log "C4 RATCHET + PERSIST: VOTING->ACTIVATED->CONFIRMED on 60%-work+95%/2*CL; CONFIRMED survives restart"
+  if [ "$SIM_VOTES" -eq 1 ]; then
+    log "  [sim] state-machine + restart persistence -- DGB_share_test.AutoRatchet* KATs"
+    ctest --test-dir build_dgb -R 'AutoRatchetStatePersistsAcrossRestart|AutoRatchetThresholdsMatchCanonical|AutoRatchetWireBaselineConstantsFromOracle' \
+      --output-on-failure || die "C4 sim (state-machine/restart KAT) failed"
+  else
+    gated "C4 live CONFIRMED requires sustained 2*CHAIN_LENGTH of rig-fed 95%/60% shares"
+  fi
+}
+
+check_c5_algo_posture() {
+  log "C5 ALGO POSTURE: Scrypt-only work-weighting; SHA256d/Skein/Qubit/Odocrypt = N/A-by-continuity"
+  # NOT a skipped check: V36 scope validates Scrypt only; the other 4 algos are
+  # asserted N/A-by-continuity (DgbAlgoSelect.AllKnownNonScryptAlgosAreContinuity).
+  ctest --test-dir build_dgb -R 'DgbAlgoSelect|DgbScryptPowKAT' \
+    --output-on-failure || die "C5 (scrypt-only work-weighting) failed"
+  log "  Scrypt validated + work-weighted; other 4 algos N/A-by-continuity (V36 design, V37 defers)"
+}
+
+# ---- driver ------------------------------------------------------------------
+main() {
+  mkdir -p "$HOME/.c2pool-dgb-g2"
+  case "${1:-run}" in
+    provision)  start_daemon; start_pool_oracle; start_pool_v36 ;;
+    checks)
+      check_c1_cohabit
+      check_c2_voting_mint
+      check_c3_staged_accept_gate
+      check_c4_ratchet_persist
+      check_c5_algo_posture
+      log "G2 check pass complete (sim=$SIM_VOTES). Fill scripts/dgb_g2_evidence_template.md."
+      ;;
+    run|*)
+      log "G2 harness: provision dual-pool substrate, then run 5 checks."
+      log "  rig-bound rows GATED until ltc-doge frees the R1-LTC scrypt window."
+      start_daemon || true
+      start_pool_oracle || true
+      start_pool_v36 || true
+      check_c1_cohabit
+      check_c2_voting_mint
+      check_c3_staged_accept_gate
+      check_c4_ratchet_persist
+      check_c5_algo_posture
+      ;;
+  esac
+}
+main "$@"