diff --git a/script/initial-distribution/fork-run.sh b/script/initial-distribution/fork-run.sh
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+#!/usr/bin/env bash
+#
+# Starts an Anvil fork of Arbitrum One, funds both disbursers with ETH and
+# IDOS tokens, then runs claim-all-bids followed by cca.
+#
+# Private keys are read from the .env file as usual (TDE_DISBURSER_PRIVATE_KEY,
+# TRACKER_DISBURSER_PRIVATE_KEY). This script only overrides RPC_URL to point
+# at the local fork.
+#
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+ANVIL_PORT="${ANVIL_PORT:-8545}"
+ANVIL_RPC="http://127.0.0.1:${ANVIL_PORT}"
+
+ARB1_RPC="https://arb1.arbitrum.io/rpc"
+TDE_DISBURSEMENT=0xdf24F4Ca9984807577d13f5ef24eD26e5AFc7083
+CCA_TRACKER=0xb628B89067E8f7Dfc2cB528a72BcfF7d5cEDcE29
+CCA=0xc27F8a94Df88C4f57B09067e07EA6bC11CA47e11
+IDOS_TOKEN=0x68731d6F14B827bBCfFbEBb62b19Daa18de1d79c
+
+# ── Start Anvil ──────────────────────────────────────────────────────────────
+
+echo "Starting Anvil fork of Arbitrum One..."
+anvil --fork-url "$ARB1_RPC" --port "$ANVIL_PORT" &
+ANVIL_PID=$!
+trap 'kill $ANVIL_PID 2>/dev/null || true' EXIT
+
+ANVIL_WAIT_TIMEOUT=30
+echo "Waiting for Anvil (port $ANVIL_PORT, timeout ${ANVIL_WAIT_TIMEOUT}s)..."
+WAIT_START=$SECONDS
+until cast block-number --rpc-url "$ANVIL_RPC" &>/dev/null; do
+  if ! kill -0 "$ANVIL_PID" 2>/dev/null; then
+    echo "Error: Anvil (pid $ANVIL_PID) died before becoming ready on port $ANVIL_PORT."
+    exit 1
+  fi
+  if (( SECONDS - WAIT_START >= ANVIL_WAIT_TIMEOUT )); then
+    echo "Error: Anvil (pid $ANVIL_PID) not ready after ${ANVIL_WAIT_TIMEOUT}s on port $ANVIL_PORT."
+    exit 1
+  fi
+  sleep 0.5
+done
+echo "Anvil ready (pid $ANVIL_PID)."
+
+# ── Mock ArbSys and patch CCA so the auction appears ended ────────────────────
+# Anvil doesn't emulate Arbitrum's ArbSys precompile at 0x64, so
+# _getBlockNumberish() (used by CCA internally) would revert. We deploy a tiny
+# mock that returns a uint256 from storage slot 0, then set that slot to a value
+# past claimBlock. We also patch the CCA bytecode to lower its immutable
+# endBlock/claimBlock so the TS-side eth_blockNumber check passes too.
+
+ARBSYS=0x0000000000000000000000000000000000000064
+
+CCA_END_BLOCK=$(cast call "$CCA" "endBlock()(uint256)" --rpc-url "$ANVIL_RPC" | awk '{print $1}')
+CCA_CLAIM_BLOCK=$(cast call "$CCA" "claimBlock()(uint256)" --rpc-url "$ANVIL_RPC" | awk '{print $1}')
+CURRENT_BLOCK=$(cast block-number --rpc-url "$ANVIL_RPC")
+
+if [ "$CURRENT_BLOCK" -lt "$CCA_CLAIM_BLOCK" ]; then
+  # Mock ArbSys: PUSH1_0 SLOAD PUSH1_0 MSTORE PUSH1_32 PUSH1_0 RETURN
+  cast rpc anvil_setCode "$ARBSYS" 0x60005460005260206000f3 --rpc-url "$ANVIL_RPC" >/dev/null
+  ARBSYS_BLOCK=$((CCA_CLAIM_BLOCK + 1000))
+  cast rpc anvil_setStorageAt "$ARBSYS" 0x0 "$(cast abi-encode 'f(uint256)' $ARBSYS_BLOCK)" --rpc-url "$ANVIL_RPC" >/dev/null
+  echo "ArbSys mock deployed (arbBlockNumber -> $ARBSYS_BLOCK)."
+
+  PAST_BLOCK=$((CURRENT_BLOCK - 100))
+  END_HEX=$(printf '%064x' "$CCA_END_BLOCK")
+  CLAIM_HEX=$(printf '%064x' "$CCA_CLAIM_BLOCK")
+  PAST_HEX=$(printf '%064x' "$PAST_BLOCK")
+
+  echo "Patching CCA bytecode: endBlock $CCA_END_BLOCK -> $PAST_BLOCK, claimBlock $CCA_CLAIM_BLOCK -> $PAST_BLOCK"
+  PATCHED_CODE=$(cast code "$CCA" --rpc-url "$ANVIL_RPC" | sed "s/$CLAIM_HEX/$PAST_HEX/g; s/$END_HEX/$PAST_HEX/g")
+  cast rpc anvil_setCode "$CCA" "$PATCHED_CODE" --rpc-url "$ANVIL_RPC" >/dev/null
+
+  echo "Verified endBlock: $(cast call "$CCA" "endBlock()(uint256)" --rpc-url "$ANVIL_RPC" | awk '{print $1}')"
+  echo "Verified claimBlock: $(cast call "$CCA" "claimBlock()(uint256)" --rpc-url "$ANVIL_RPC" | awk '{print $1}')"
+else
+  echo "Already past CCA claimBlock ($CCA_CLAIM_BLOCK)."
+fi
+
+# ── Discover and fund disbursers ─────────────────────────────────────────────
+
+TDE_DISBURSER=$(cast call "$TDE_DISBURSEMENT" "DISBURSER()(address)" --rpc-url "$ANVIL_RPC")
+TRACKER_DISBURSER=$(cast call "$CCA_TRACKER" "disburser()(address)" --rpc-url "$ANVIL_RPC")
+echo "TDE disburser:     $TDE_DISBURSER"
+echo "Tracker disburser: $TRACKER_DISBURSER"
+
+for addr in "$TDE_DISBURSER" "$TRACKER_DISBURSER"; do
+  # 1000 ETH
+  cast rpc anvil_setBalance "$addr" 0x3635C9ADC5DEA00000 --rpc-url "$ANVIL_RPC" >/dev/null
+done
+echo "Both disbursers funded with ETH."
+
+# Fund TDE disburser with IDOS tokens (OZ ERC20: _balances mapping at slot 0)
+BALANCE_SLOT=$(cast index address "$TDE_DISBURSER" 0)
+EXPECTED_TOKEN_AMOUNT=$(cast to-wei 100000000)
+TOKEN_AMOUNT_HEX=$(cast abi-encode "f(uint256)" "$EXPECTED_TOKEN_AMOUNT")
+cast rpc anvil_setStorageAt "$IDOS_TOKEN" "$BALANCE_SLOT" "$TOKEN_AMOUNT_HEX" --rpc-url "$ANVIL_RPC" >/dev/null
+
+ACTUAL_BALANCE=$(cast call "$IDOS_TOKEN" "balanceOf(address)(uint256)" "$TDE_DISBURSER" --rpc-url "$ANVIL_RPC" | awk '{print $1}')
+if [ "$ACTUAL_BALANCE" != "$EXPECTED_TOKEN_AMOUNT" ]; then
+  echo "Error: IDOS token funding failed (storage-layout drift?)."
+  echo "  IDOS_TOKEN:    $IDOS_TOKEN"
+  echo "  TDE_DISBURSER: $TDE_DISBURSER"
+  echo "  Expected:      $EXPECTED_TOKEN_AMOUNT"
+  echo "  Actual:        $ACTUAL_BALANCE"
+  exit 1
+fi
+echo "TDE disburser IDOS balance: $ACTUAL_BALANCE"
+
+# ── Run scripts ──────────────────────────────────────────────────────────────
+
+cd "$SCRIPT_DIR"
+
+: "${TDE_DISBURSER_PRIVATE_KEY:?must be set to the tde_disburser private key}"
+if [ "$(cast wallet address --private-key "$TDE_DISBURSER_PRIVATE_KEY")" != "$TDE_DISBURSER" ]; then
+  echo "Error: TDE disburser private key does not have the expected address $TDE_DISBURSER"
+  echo "Expected: $TDE_DISBURSER"
+  echo "Actual: $(cast wallet address --private-key "$TDE_DISBURSER_PRIVATE_KEY")"
+  exit 1
+fi
+
+: "${TRACKER_DISBURSER_PRIVATE_KEY:?must be set to the tracker_disburser private key}"
+if [ "$(cast wallet address --private-key "$TRACKER_DISBURSER_PRIVATE_KEY")" != "$TRACKER_DISBURSER" ]; then
+  echo "Error: Tracker disburser private key does not have the expected address $TRACKER_DISBURSER"
+  echo "Expected: $TRACKER_DISBURSER"
+  echo "Actual: $(cast wallet address --private-key "$TRACKER_DISBURSER_PRIVATE_KEY")"
+  exit 1
+fi
+
+echo "TDE and tracker disbursers private keys set successfully."
+
+echo "=== claim-all-bids ==="
+RPC_URL="$ANVIL_RPC" pnpm run claim-all-bids
+
+echo ""
+echo "=== cca ==="
+RPC_URL="$ANVIL_RPC" pnpm run cca
+
+echo ""
+echo "=== Fork run completed ==="