diff --git a/scripts/reboot-recovery/deploy-agent99-via-windows99-ssh.sh b/scripts/reboot-recovery/deploy-agent99-via-windows99-ssh.sh
index 7c62ba318..72f51d02d 100755
--- a/scripts/reboot-recovery/deploy-agent99-via-windows99-ssh.sh
+++ b/scripts/reboot-recovery/deploy-agent99-via-windows99-ssh.sh
@@ -47,7 +47,7 @@ usage() {
     "Usage: $0 [--check|--apply] [options]" \
     "" \
     "Default is a remote no-write check/plan against fixed target ${TARGET}." \
-    "Apply requires --apply plus --trace-id, --run-id, and --work-item-id." \
+    "Check and apply require --trace-id, --run-id, and --work-item-id." \
     "" \
     "Options:" \
     "  --check                       No-write transport and envelope check (default)." \
@@ -139,12 +139,13 @@ done
 [[ "${CONNECT_TIMEOUT_SECONDS}" =~ ^[0-9]+$ ]] || fail "invalid_connect_timeout"
 (( CONNECT_TIMEOUT_SECONDS >= 1 && CONNECT_TIMEOUT_SECONDS <= 30 )) || fail "invalid_connect_timeout"
 
+readonly SAFE_ID_PATTERN='^[A-Za-z0-9][A-Za-z0-9._:@+-]{0,127}$'
+[[ "${TRACE_ID}" =~ ${SAFE_ID_PATTERN} ]] || fail "${MODE}_trace_id_missing_or_invalid"
+[[ "${RUN_ID}" =~ ${SAFE_ID_PATTERN} ]] || fail "${MODE}_run_id_missing_or_invalid"
+[[ "${WORK_ITEM_ID}" =~ ${SAFE_ID_PATTERN} ]] || fail "${MODE}_work_item_id_missing_or_invalid"
+
 if [[ "${MODE}" == "apply" ]]; then
   REMOTE_EXECUTION_TIMEOUT_SECONDS="2400"
-  readonly SAFE_ID_PATTERN='^[A-Za-z0-9][A-Za-z0-9._:@+-]{0,127}$'
-  [[ "${TRACE_ID}" =~ ${SAFE_ID_PATTERN} ]] || fail "apply_trace_id_missing_or_invalid"
-  [[ "${RUN_ID}" =~ ${SAFE_ID_PATTERN} ]] || fail "apply_run_id_missing_or_invalid"
-  [[ "${WORK_ITEM_ID}" =~ ${SAFE_ID_PATTERN} ]] || fail "apply_work_item_id_missing_or_invalid"
 fi
 
 for dependency in git python3 ssh scp mktemp hostname timeout; do
@@ -208,6 +209,7 @@ trap cleanup EXIT HUP INT TERM
 ENVELOPE_PATH="${WORK_DIR}/envelope.json"
 BOOTSTRAP_PATH="${WORK_DIR}/remote-bootstrap.ps1"
 BOOTSTRAP_PAYLOAD_PATH="${WORK_DIR}/remote-bootstrap.ps1.gz.b64"
+CHECK_REMOTE_RECEIPT_PATH="${WORK_DIR}/check-remote-receipt.json"
 
 python3 - \
   "${SOURCE_ROOT}" \
@@ -561,12 +563,65 @@ cleanup_remote_payload() {
     >/dev/null 2>&1
 }
 
+project_check_receipt_identity() {
+  python3 - \
+    "${CHECK_REMOTE_RECEIPT_PATH}" \
+    "${TRACE_ID}" \
+    "${RUN_ID}" \
+    "${WORK_ITEM_ID}" <<'PY'
+from __future__ import annotations
+
+import json
+import sys
+from pathlib import Path
+
+receipt_path = Path(sys.argv[1])
+trace_id, run_id, work_item_id = sys.argv[2:5]
+try:
+    receipt = json.loads(receipt_path.read_text(encoding="utf-8"))
+except (OSError, UnicodeError, json.JSONDecodeError):
+    raise SystemExit(65)
+
+if not isinstance(receipt, dict):
+    raise SystemExit(65)
+if receipt.get("schemaVersion") != "agent99_remote_atomic_deploy_receipt_v1":
+    raise SystemExit(65)
+if receipt.get("mode") != "check":
+    raise SystemExit(65)
+if receipt.get("status") not in {"check_ready", "check_failed_no_apply"}:
+    raise SystemExit(65)
+
+identity = {
+    "traceId": trace_id,
+    "runId": run_id,
+    "workItemId": work_item_id,
+}
+for field, expected in identity.items():
+    if field in receipt and receipt[field] != expected:
+        raise SystemExit(65)
+    receipt[field] = expected
+
+sys.stdout.write(json.dumps(receipt, separators=(",", ":"), ensure_ascii=True) + "\n")
+PY
+}
+
 if [[ "${MODE}" == "check" ]]; then
   set +e
   timeout --signal=TERM --kill-after=10 "${REMOTE_EXECUTION_TIMEOUT_SECONDS}s" \
-    ssh "${SSH_OPTIONS[@]}" "${TARGET}" "${REMOTE_CHECK_COMMAND}" </dev/null
+    ssh "${SSH_OPTIONS[@]}" "${TARGET}" "${REMOTE_CHECK_COMMAND}" </dev/null \
+    >"${CHECK_REMOTE_RECEIPT_PATH}"
   status=$?
   set -e
+  set +e
+  project_check_receipt_identity
+  projection_status=$?
+  set -e
+  if [[ "${projection_status}" -ne 0 ]]; then
+    printf 'agent99_transport_error=check_receipt_identity_projection_failed\n' >&2
+    if [[ "${status}" -eq 0 ]]; then
+      exit 65
+    fi
+  fi
   exit "${status}"
 fi
 
diff --git a/scripts/reboot-recovery/tests/test_agent99_remote_atomic_deploy_transport_contract.py b/scripts/reboot-recovery/tests/test_agent99_remote_atomic_deploy_transport_contract.py
index 5edc6ebd1..a228d554f 100644
--- a/scripts/reboot-recovery/tests/test_agent99_remote_atomic_deploy_transport_contract.py
+++ b/scripts/reboot-recovery/tests/test_agent99_remote_atomic_deploy_transport_contract.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import base64
+import json
 import os
 import re
 import shlex
@@ -55,9 +56,9 @@ def test_sender_is_valid_shell_with_check_as_the_default() -> None:
     assert 'MODE="check"' in source
     assert "--apply" in source
     assert 'MODE="apply"' in source
-    assert "apply_trace_id_missing_or_invalid" in source
-    assert "apply_run_id_missing_or_invalid" in source
-    assert "apply_work_item_id_missing_or_invalid" in source
+    assert 'fail "${MODE}_trace_id_missing_or_invalid"' in source
+    assert 'fail "${MODE}_run_id_missing_or_invalid"' in source
+    assert 'fail "${MODE}_work_item_id_missing_or_invalid"' in source
     assert 'MODE_SELECTION="default"' in source
     assert 'REMOTE_EXECUTION_TIMEOUT_SECONDS="180"' in source
     assert 'REMOTE_EXECUTION_TIMEOUT_SECONDS="2400"' in source
@@ -291,6 +292,34 @@ def test_receiver_has_single_flight_idempotency_and_no_secret_receipt_boundary()
     assert "[bool]$prior.relayReload.newGenerationVerified" in source
 
 
+def test_check_and_apply_receipts_project_the_same_run_identity() -> None:
+    sender = SENDER.read_text(encoding="utf-8")
+    projector = sender[
+        sender.index("project_check_receipt_identity()") : sender.index(
+            'if [[ "${MODE}" == "check" ]]'
+        )
+    ]
+    assert '"traceId": trace_id' in projector
+    assert '"runId": run_id' in projector
+    assert '"workItemId": work_item_id' in projector
+    assert "receipt[field] != expected" in projector
+    assert "raise SystemExit(65)" in projector
+
+    receiver = RECEIVER.read_text(encoding="utf-8")
+    success_receipt = receiver[
+        receiver.index("$successReceipt = [pscustomobject]@{") : receiver.index(
+            "Write-AgentRemoteDeployReceipt $receiptPath $successReceipt"
+        )
+    ]
+    assert "traceId = $traceId" in success_receipt
+    assert "runId = $runId" in success_receipt
+    assert "workItemId = $workItemId" in success_receipt
+    assert "secretValueRead = $false" in success_receipt
+    assert "privateKeyValueRead = $false" in success_receipt
+    assert "tokenValueRead = $false" in success_receipt
+    assert "environmentSecretRead = $false" in success_receipt
+
+
 def test_receiver_creates_canonical_success_receipt_once_with_atomic_no_replace() -> None:
     source = RECEIVER.read_text(encoding="utf-8")
     writer = source[
@@ -586,6 +615,39 @@ def test_apply_without_all_three_identities_fails_before_ssh() -> None:
     assert "known_hosts_file_missing" not in result.stderr
 
 
+def test_check_requires_complete_safe_same_run_identity_before_ssh() -> None:
+    cases = (
+        ((), "check_trace_id_missing_or_invalid"),
+        (("--trace-id", "trace-fixture"), "check_run_id_missing_or_invalid"),
+        (
+            ("--trace-id", "trace-fixture", "--run-id", "run-fixture"),
+            "check_work_item_id_missing_or_invalid",
+        ),
+        (
+            (
+                "--trace-id",
+                "trace fixture",
+                "--run-id",
+                "run-fixture",
+                "--work-item-id",
+                "AIA-SRE-P0-20260715",
+            ),
+            "check_trace_id_missing_or_invalid",
+        ),
+    )
+
+    for identity_args, expected_error in cases:
+        result = subprocess.run(
+            ["bash", str(SENDER), "--check", *identity_args],
+            check=False,
+            capture_output=True,
+            text=True,
+        )
+        assert result.returncode == 64
+        assert expected_error in result.stderr
+        assert "known_hosts_file_missing" not in result.stderr
+
+
 def test_check_mode_uses_bounded_control_command_without_ssh_stdin(
     tmp_path: Path,
 ) -> None:
@@ -610,7 +672,13 @@ def test_check_mode_uses_bounded_control_command_without_ssh_stdin(
         "#!/usr/bin/env bash\n"
         f"printf '%s\\n' \"$@\" >{shlex.quote(str(args_path))}\n"
         f"wc -c | tr -d ' ' >{shlex.quote(str(bytes_path))}\n"
-        "printf '%s\\n' '{\"status\":\"check_ready\"}'\n",
+        'if [[ -n "${FAKE_CHECK_RECEIPT:-}" ]]; then\n'
+        "  printf '%s\\n' \"$FAKE_CHECK_RECEIPT\"\n"
+        "else\n"
+        "  printf '%s\\n' "
+        '\'{"schemaVersion":"agent99_remote_atomic_deploy_receipt_v1",'
+        '"status":"check_ready","mode":"check"}\'\n'
+        "fi\n",
         encoding="utf-8",
     )
     fake_timeout = fake_bin / "timeout"
@@ -647,6 +715,12 @@ def test_check_mode_uses_bounded_control_command_without_ssh_stdin(
             "bash",
             str(SENDER),
             "--check",
+            "--trace-id",
+            "trace-fixture",
+            "--run-id",
+            "run-fixture",
+            "--work-item-id",
+            "AIA-SRE-P0-20260715",
             "--known-hosts-file",
             str(known_hosts),
             "--identity-file",
@@ -659,7 +733,11 @@ def test_check_mode_uses_bounded_control_command_without_ssh_stdin(
     )
 
     assert result.returncode == 0, result.stderr
-    assert '"status":"check_ready"' in result.stdout
+    receipt = json.loads(result.stdout)
+    assert receipt["status"] == "check_ready"
+    assert receipt["traceId"] == "trace-fixture"
+    assert receipt["runId"] == "run-fixture"
+    assert receipt["workItemId"] == "AIA-SRE-P0-20260715"
     args = args_path.read_text(encoding="utf-8")
     remote_command = args.splitlines()[-1]
     assert "BatchMode=yes" in args
@@ -673,6 +751,9 @@ def test_check_mode_uses_bounded_control_command_without_ssh_stdin(
     assert "agent99-contract-check.ps1" in check_script
     assert "Get-FileHash" in check_script
     assert "runtimeContract" in check_script
+    assert "trace-fixture" not in check_script
+    assert "run-fixture" not in check_script
+    assert "AIA-SRE-P0-20260715" not in check_script
     assert "$ready=[bool]($c.executed-and$c.ok-and$c.exitCode-eq 0)" in check_script
     assert "'check_failed_no_apply'" in check_script
     assert "if(-not$ready){exit 65}" in check_script
@@ -692,6 +773,30 @@ def test_check_mode_uses_bounded_control_command_without_ssh_stdin(
     stdin_bytes = int(bytes_path.read_text(encoding="utf-8"))
     assert stdin_bytes == 0
 
+    conflicting_environment = environment.copy()
+    conflicting_environment["FAKE_CHECK_RECEIPT"] = json.dumps(
+        {
+            "schemaVersion": "agent99_remote_atomic_deploy_receipt_v1",
+            "status": "check_ready",
+            "mode": "check",
+            "traceId": "different-trace",
+        },
+        separators=(",", ":"),
+    )
+    conflicting_result = subprocess.run(
+        result.args,
+        check=False,
+        capture_output=True,
+        text=True,
+        env=conflicting_environment,
+    )
+    assert conflicting_result.returncode == 65
+    assert conflicting_result.stdout == ""
+    assert (
+        "agent99_transport_error=check_receipt_identity_projection_failed"
+        in conflicting_result.stderr
+    )
+
 
 def test_apply_uses_ephemeral_file_transport_and_cleans_up_without_ssh_stdin(
     tmp_path: Path,