fix(agent99): fail closed host110 runtime replay

docs/proposals/AWOOOI-AG99-H110-BACKUP-RUNTIME-V10.md

@@ -0,0 +1,217 @@
+# AWOOOI Agent99 Host110 Backup Runtime V10
+
+Status: proposed; central review and explicit owner approval are required before
+any production apply.
+
+This artifact supersedes V2 through V9. Every V9 identity below is void for
+approval and remains audit evidence only:
+
+- branch/ref: `codex/host110-backup-runtime-v9-20260718`
+- candidate/revision: `8f11ef3362a8d7f66a46308b58fd142b0c91a8bc`
+- artifact SHA-256: `929978eb3da15b04791a8614e6d5ee504ae2a4c2f205b694307a7bad7713bcad`
+- exact diff SHA-256: `8085d49450b74e7c43577ba118cbd74d3a2e3dd2d22eeba90ce749d56c72c0f2`
+- every other V9 proposal, content, revision, and derived hash
+
+No V9 hash, ref, review, receipt, or test grants production execution
+authority.
+
+## Exact Scope
+
+- Agent99 runtime bundle: 19 files, guarded by one producer/consumer parity
+  test.
+- Host110 backup payload: 18 ordered files, comprising 17 backup scripts and
+  `backup-health-textfile-exporter.py`.
+- Host110 remote stage: 21 unique basenames, comprising the ordered 18-file
+  payload, fixed executor, independent verifier, and `manifest.json`.
+- Fixed target: `wooo@192.168.0.110`, dispatched by Windows99 Agent99 from an
+  exact Gitea revision and digest manifest.
+- The candidate includes a 10-line runtime-lock addition to
+  `scripts/backup/gitea-full-backup-restore-drill.sh`. A future drill invocation
+  acquires the shared Host110 backup-runtime lock before its pre-existing drill
+  behavior. Applying this candidate replaces the script but does not invoke the
+  drill or any container lifecycle.
+- `scripts/backup/backup-gitea.sh` has zero diff from the production base. No
+  Gitea primary stop/start or backup-container creation is part of this
+  candidate apply.
+- V7, V8, and V9 proposal documents remain tracked audit artifacts and are not
+  runtime authority.
+- `agent99-host110-broker-contract-replay.ps1` is a no-write Windows99 test
+  asset; it is not part of the 19-file Agent99 runtime or 18-file Host110
+  payload.
+
+## V9 Defects Closed
+
+### Signal-Safe Commit Boundary
+
+The executor enters a signal-deferring critical section before publishing the
+payload receipt. `INT`, `HUP`, and `TERM` are recorded without exiting until the
+durable payload-receipt readback and `APPLY_COMPLETE=1` commit state are both
+established. A deferred signal can never enter the pre-commit EXIT rollback
+path after the payload receipt exists.
+
+After commit, exact stage and rollback-prestate cleanup still run. If cleanup
+is complete, a deferred signal produces the non-success terminal
+`committed_signal_deferred`, a durable terminal receipt, the corresponding
+129/130/143 exit, and an applied payload. TERM, HUP, and INT are replayed in the
+exact receipt-to-commit window.
+
+After cleanup, terminal publication uses a bounded signal mask. Signals captured
+before that boundary remain part of the non-success terminal; signals delivered
+during the immutable terminal writer cannot mutate its already-final state.
+Terminal-writer TERM, HUP, and INT replays require receipt, stdout, payload, and
+exit to remain consistent.
+
+### Payload And Terminal Receipts
+
+The immutable payload receipt has status `payload_verified`; it proves exact
+payload, independent verifier, durable receipt readback, and absence of
+run-owned destination temporaries. It does not claim internal stage or rollback
+prestate cleanup.
+
+A separate immutable terminal receipt is the authority for overall success.
+Only status `verified` with `stageCleanupVerified=true`,
+`rollbackPrestateCleanupVerified=true`, no deferred signal, and exit code zero
+may yield executor `ok:true`. Each successful cleanup is absence-read back and
+its parent directory is fsynced before terminal publication.
+
+If either cleanup fails, the payload remains committed, exact residue is
+preserved, terminal status is `cleanup_pending`, executor output is
+`ok:false`, and exit is nonzero. A payload receipt cannot be used as a
+zero-residue or broker-success shortcut. The Windows99 broker validates every
+status, payload, rollback, residue-scope, cleanup, signal, exit, receipt-path,
+and independent-verifier field fail-closed.
+Committed non-success outputs are parsed and retained in broker evidence before
+the broker fails overall; `cleanup_pending`, `committed_signal_deferred`, and
+`terminal_receipt_failed` can never be collapsed into an ambiguous generic
+transport failure.
+
+### Existing Transaction Guarantees Retained
+
+- Producer and executor payload basenames are exact-equal in count, set, and
+  order: 18 payload files and 21 unique staged files.
+- Receipt write, hard-link, fsync, and readback failures roll back exact content
+  and metadata without publishing success.
+- Terminal-receipt write, hard-link, fsync, and readback failures keep the
+  verified payload, publish no terminal success, emit structured committed
+  failure evidence with `terminalReceiptPublished=false`, and exit nonzero.
+- Apply and rollback destination temporaries are run-owned, tracked, removed,
+  and absence-read back.
+- Rollback attempted, performed, verified, and residue truth remain separate;
+  partial or unknown rollback terminates `rollback_unverified`.
+- Fault hooks require both the explicit test flag and a transformed
+  non-production destination; canonical `/backup/scripts` cannot enable them.
+
+## Apply Effects
+
+- Windows99 Agent99 runtime promotion writes the 19 runtime files plus bounded
+  manifest and receipt state.
+- Host110 Apply replaces the ordered 18 payload paths through one exclusive,
+  digest-bound filesystem transaction, and writes payload/terminal receipts
+  below `/backup/status`.
+- The deployed restore-drill script gains shared-lock behavior. The apply does
+  not execute that script.
+- Apply does not run a backup, invoke a Gitea container lifecycle, sync Google
+  Drive, prune snapshots, restart a VM or service, or change a database,
+  network, firewall, credential, or secret.
+
+## Reproducible Validation
+
+Focused replay and contract suite:
+
+```sh
+pytest -q \
+  scripts/reboot-recovery/tests/test_agent99_host110_backup_runtime_broker.py \
+  scripts/backup/tests/test_verify_offsite_full_sync_runtime.py \
+  scripts/ops/tests/test_agent99_signoz_metadata_executor_runtime_entrypoint.py \
+  scripts/ops/tests/test_db_bounded_executor_runtime_entrypoint.py \
+  scripts/reboot-recovery/tests/test_agent99_live_preflight_decision.py \
+  scripts/reboot-recovery/tests/test_agent99_remote_atomic_deploy_transport_contract.py \
+  scripts/reboot-recovery/tests/test_host112_manager_recovery_contract.py
+```
+
+Exact signal and post-commit cleanup replays:
+
+```sh
+pytest -vv \
+  scripts/reboot-recovery/tests/test_agent99_host110_backup_runtime_broker.py \
+  -k 'commit_window_signal or terminal_publication or terminal_receipt_fault or postcommit_cleanup'
+```
+
+Static, syntax, and repository checks:
+
+```sh
+ruff check scripts/reboot-recovery/tests/test_agent99_host110_backup_runtime_broker.py
+bash -n scripts/backup/host110-backup-runtime-executor.sh
+git diff --check
+PATH=/Users/ogt/.pyenv/shims:$PATH bash scripts/ops/ansible-validate.sh
+```
+
+`ansible-validate.sh` parses
+`ops/reboot-recovery/full-stack-backup-baseline.yml` as YAML metadata. It runs
+`ansible-playbook --syntax-check` only for the actual playbooks listed by the
+script; the metadata mapping is not represented as a playbook.
+
+Windows99 no-file-write PowerShell parser check:
+
+```sh
+PARSER_COMMAND='$source=[Console]::In.ReadToEnd(); $tokens=$null; $errors=$null; [System.Management.Automation.Language.Parser]::ParseInput($source,[ref]$tokens,[ref]$errors) | Out-Null; [pscustomobject]@{ok=($errors.Count -eq 0); errorCount=$errors.Count; parser="WindowsPowerShell"} | ConvertTo-Json -Compress; if ($errors.Count -ne 0) { exit 1 }'
+ENCODED=$(printf '%s' "$PARSER_COMMAND" | iconv -f UTF-8 -t UTF-16LE | base64 | tr -d '\n')
+ssh -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=5 \
+  -o ConnectionAttempts=1 Administrator@192.168.0.99 \
+  "powershell.exe -NoProfile -NonInteractive -EncodedCommand $ENCODED" \
+  < agent99-host110-backup-runtime-broker.ps1
+```
+
+Windows99 actual-function missing-field/type contract replay:
+
+```sh
+WRAPPER='$script=[Console]::In.ReadToEnd(); & ([ScriptBlock]::Create($script))'
+WRAPPER_ENCODED=$(printf '%s' "$WRAPPER" | iconv -f UTF-8 -t UTF-16LE | base64 | tr -d '\n')
+BROKER_GZIP_BASE64=$(gzip -c agent99-host110-backup-runtime-broker.ps1 | base64 | tr -d '\n')
+awk -v payload="$BROKER_GZIP_BASE64" \
+  'BEGIN { print "$BrokerGzipBase64 = \"" payload "\"" } { print }' \
+  scripts/reboot-recovery/tests/agent99-host110-broker-contract-replay.ps1 |
+  ssh -o BatchMode=yes -o StrictHostKeyChecking=yes -o ConnectTimeout=5 \
+    -o ConnectionAttempts=1 Administrator@192.168.0.99 \
+    "powershell.exe -NoProfile -NonInteractive -ExecutionPolicy Bypass -EncodedCommand $WRAPPER_ENCODED"
+```
+
+The replay loads the candidate broker's actual function AST, accepts the valid
+success and three committed non-success terminals, then removes every required
+field and injects wrong JSON types. Expected readback is 34 missing-field and 6
+type rejections. It performs no remote file write.
+
+## Exact Diff Serialization
+
+Substitute the V10 Gitea live-ref SHA for `<candidate_git_sha>` and hash the
+exact stdout bytes:
+
+```sh
+git diff --binary --full-index \
+  e7e3bcf8a5a8a19c1253d73f51d9dca248af0aa3..<candidate_git_sha> |
+  shasum -a 256
+```
+
+Central review must independently bind the live feature ref and candidate Git
+SHA, this tracked artifact path and bytes hash, the serialized diff hash/path
+count/line counts, the 19/18/21 count contracts, and the exact restore-drill and
+`backup-gitea.sh` diffs.
+
+## Rollback
+
+- Source rollback reverts the exact V10 diff to
+  `e7e3bcf8a5a8a19c1253d73f51d9dca248af0aa3` without force-pushing.
+- Agent99 rollback restores the prior runtime files and manifest and verifies
+  prior hashes independently.
+- Before payload commit, Host110 rollback restores all prior payload content,
+  SHA-256, uid, gid, and mode under the exclusive lock and proves no run-owned
+  destination temporary remains.
+- After payload commit, the executor never rolls the payload back merely due to
+  a signal or cleanup error. It preserves exact cleanup evidence and reports a
+  non-success terminal. Any later cleanup-only remediation is a separate
+  controlled action scoped to the run-specific stage/prestate paths and may not
+  rewrite the verified payload.
+- Source rollback restores the restore-drill script's prior unlocked behavior.
+  It does not invoke the drill or any container lifecycle.
+- Any canonical, metadata, receipt, signal, cleanup, or residue mismatch fails
+  closed and cannot produce broker `verified`.

docs/proposals/AWOOOI-AG99-H110-BACKUP-RUNTIME-V11.md

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+# AWOOOI Agent99 Host110 Backup Runtime V11
+
+Status: proposed. Central review and explicit owner approval are required before
+any production apply. This candidate must not be pushed to `main`, sent through
+CD, or applied to Windows99 or Host110 while it remains proposed.
+
+This artifact supersedes V10. Every V10 identity below is void for approval and
+remains audit evidence only:
+
+- branch/ref: `codex/host110-backup-runtime-v10-20260718`
+- candidate/revision: `d1797a1c8766722ae00ac14e20fed00f4e3f3a5b`
+- artifact SHA-256: `eb48661bbecc4e169111879bb18dfab63be29878d5f5c3651d9917f81f195d28`
+- exact diff SHA-256: `f7efb98d5f91fa6899713b692c8bb015fcb6ae6dba4291cc6ae429290072964e`
+- every other V10 proposal, content, revision, review, and derived hash
+
+No V10 hash, ref, review, receipt, or test grants production execution
+authority.
+
+## Exact Scope
+
+- Agent99 runtime bundle: 19 files, guarded by one producer/consumer parity
+  test.
+- Host110 backup payload: 18 ordered files, comprising 17 backup scripts and
+  `backup-health-textfile-exporter.py`.
+- Host110 remote stage: 21 unique basenames, comprising the ordered 18-file
+  payload, fixed executor, independent verifier, and `manifest.json`.
+- Fixed target: `wooo@192.168.0.110`, dispatched only by the Windows99 Agent99
+  typed broker from an exact Gitea revision and digest-bound manifest.
+- V11 changes the Windows99 broker, three shell shared-lock entrypoints, the
+  Host188 archive verifier's shared-lock acquisition, and their no-write replay
+  tests.
+- `scripts/backup/backup-gitea.sh` has zero diff from the production base. No
+  Gitea primary stop/start or backup-container creation is part of this apply.
+- The restore drill and offsite gate gain only canonical shared-lock behavior.
+  Applying this candidate replaces those scripts but does not invoke a drill,
+  run a backup, or start an offsite sync.
+- Prior proposal documents remain tracked audit artifacts and are not runtime
+  authority.
+
+## V10 Defects Closed
+
+### Persisted Broker Evidence Is Exact And Fail-Closed
+
+Before reusing a run-bound broker receipt, the broker now validates exact key
+sets, required native JSON types, schema version, run ID, source revision, mode,
+target, evidence path binding, status, error, cleanup, and nested Apply/Verify
+contracts. Missing, extra, wrong-type, wrong-mode, wrong-run, conflicting, or
+malformed evidence fails closed before any replay decision.
+
+A non-empty string such as `"false"` can no longer be cast to a truthy Boolean.
+An existing failure remains a failure and cannot be upgraded to success merely
+because it is parseable or shares a source revision.
+
+### Mandatory Post-Commit Transport Reconciliation
+
+If Apply loses SSH transport or times out, the broker performs a read-only,
+exact-RunId receipt readback under `/backup/status` and an independent
+destination verifier readback. It never blindly retries Apply and never
+collapses a post-commit state into a generic precommit failure.
+
+The reconciliation states are explicit and non-success:
+
+- `committed_verified_terminal_missing`
+- `committed_verified_transport_lost`
+- `committed_cleanup_pending_transport_lost`
+- `committed_signal_deferred_transport_lost`
+- `committed_unknown`
+
+Every state records `retryApplyAllowed=false`. Receipt schema, native types,
+source/run/head identity, payload paths and counts, verifier identity, cleanup,
+signal, and terminal semantics are validated before classification. The
+readback performs no remote write and reads no secret value.
+
+### Canonical Shared Lock And Nested Re-entry
+
+Production backup entrypoints canonicalize absolute, relative, and symlink
+invocation paths before deciding whether the Host110 runtime lock applies.
+Unresolvable production identity fails closed.
+
+For nested calls, an inherited FD 197 is accepted only when its canonical
+target is the exact runtime lock. Linux uses `/proc/$$/fd/197`; the bounded
+non-Linux fallback resolves the descriptor path with `F_GETPATH`. The entrypoint
+then requests the shared lock on the same descriptor. It does not close and
+reopen a valid inherited descriptor, so there is no release/reacquire gap.
+
+If FD 197 is absent, the entrypoint opens the lock and acquires the shared side.
+If FD 197 exists but points elsewhere or cannot be resolved, execution fails
+closed. `BACKUP_RUNTIME_SHARED_LOCK_HELD` and all other external environment
+values grant no lock authority.
+
+The Host188 archive verifier follows the same contract: exact inherited FD 197
+is duplicated from the same open file description, wrong identity fails
+closed, and a forged environment value cannot bypass an active exclusive lock.
+
+## Apply Effects
+
+- Windows99 Agent99 runtime promotion writes the 19 runtime files plus bounded
+  manifest and receipt state.
+- Host110 Apply replaces the ordered 18 payload paths through one exclusive,
+  digest-bound filesystem transaction and writes payload/terminal receipts
+  below `/backup/status`.
+- The deployed common library, restore drill, offsite gate, and Host188 archive
+  verifier gain the shared-lock behavior described above. Apply does not invoke
+  their backup, drill, archive, or sync behavior.
+- Apply does not stop/start Gitea, create a backup container, call Google Drive,
+  prune snapshots, restart a VM or service, change a database/network/firewall,
+  or read/change a credential or secret.
+
+## Reproducible Validation
+
+Expanded focused and compatibility suite:
+
+```sh
+pytest -q \
+  scripts/reboot-recovery/tests/test_agent99_host110_backup_runtime_broker.py \
+  scripts/backup/tests/test_verify_offsite_full_sync_runtime.py \
+  scripts/backup/tests/test_verify_host188_products_archive.py \
+  scripts/backup/tests/test_backup_host188_products_contract.py \
+  scripts/ops/tests/test_agent99_signoz_metadata_executor_runtime_entrypoint.py \
+  scripts/ops/tests/test_db_bounded_executor_runtime_entrypoint.py \
+  scripts/reboot-recovery/tests/test_agent99_live_preflight_decision.py \
+  scripts/reboot-recovery/tests/test_agent99_remote_atomic_deploy_transport_contract.py \
+  scripts/reboot-recovery/tests/test_host112_manager_recovery_contract.py
+```
+
+Current result: `120 passed, 4 skipped`.
+
+The shared-lock subset includes real `fcntl` contention for absolute,
+relative, symlink, forged-environment, inherited-exact-FD, inherited-wrong-FD,
+and Host188 archive paths. Current result: `18 passed, 31 deselected`.
+
+Static, syntax, and repository checks:
+
+```sh
+ruff check \
+  scripts/reboot-recovery/tests/test_agent99_host110_backup_runtime_broker.py \
+  scripts/backup/verify-host188-products-archive.py
+bash -n \
+  scripts/backup/common.sh \
+  scripts/backup/gitea-full-backup-restore-drill.sh \
+  scripts/backup/backup-offsite-readiness-gate.sh \
+  scripts/backup/host110-backup-runtime-executor.sh
+git diff --check
+PATH=/Users/ogt/.pyenv/shims:$PATH bash scripts/ops/ansible-validate.sh
+```
+
+`ansible-validate.sh` parses
+`ops/reboot-recovery/full-stack-backup-baseline.yml` as YAML metadata. It runs
+`ansible-playbook --syntax-check` only for actual playbooks. Current checks are
+green; `ansible-lint` is not installed and is reported as skipped.
+
+Windows99 no-write PowerShell validation consists of:
+
+1. parsing the complete candidate broker with Windows PowerShell;
+2. loading the candidate broker's actual function AST in the contract replay;
+3. replaying valid success, committed non-success, existing evidence rejection,
+   terminal-missing reconciliation, and committed-unknown cases.
+
+Current readback is parser `errorCount=0`, plus 38 existing-evidence
+rejections, 38 missing-field rejections, 6 type rejections,
+`terminalMissingReconciled=true`, `committedUnknownPreserved=true`,
+`remoteWritePerformed=false`, and `secretValuesRead=false`.
+
+## Exact Identity And Diff Serialization
+
+The central-review intake must bind all of the following independently:
+
+- live Gitea feature ref `codex/host110-backup-runtime-v11-20260718`;
+- exact candidate Git SHA;
+- this tracked artifact path and exact artifact-bytes SHA-256;
+- exact binary diff SHA-256, path count, and insertion/deletion counts;
+- the 19/18/21 count contracts;
+- `scripts/backup/backup-gitea.sh` zero diff;
+- the Windows99 no-write replay result.
+
+Exact diff bytes are serialized with:
+
+```sh
+git diff --binary --full-index \
+  e7e3bcf8a5a8a19c1253d73f51d9dca248af0aa3..<candidate_git_sha> |
+  shasum -a 256
+```
+
+No alternative diff serialization or untracked artifact bytes may be used for
+approval identity.
+
+## Rollback
+
+- Source rollback reverts the exact V11 diff to
+  `e7e3bcf8a5a8a19c1253d73f51d9dca248af0aa3` without force-pushing.
+- Agent99 rollback restores prior runtime files and manifest and verifies prior
+  hashes independently.
+- Before payload commit, Host110 rollback restores prior payload content,
+  SHA-256, uid, gid, and mode under the exclusive lock and proves no run-owned
+  destination temporary remains.
+- After payload commit, transport loss cannot trigger a blind Apply retry.
+  Exact receipts and independent destination readback determine whether the
+  state is committed or unknown; every uncertain state remains non-success.
+- Source rollback restores prior lock behavior. It does not execute a backup,
+  restore drill, offsite sync, container lifecycle, or service restart.
+- Any identity, schema, type, receipt, reconciliation, lock, cleanup, or
+  residue mismatch fails closed and cannot produce broker `verified`.

docs/proposals/AWOOOI-AG99-H110-BACKUP-RUNTIME-V9.md

@@ -0,0 +1,133 @@
+# AWOOOI Agent99 Host110 Backup Runtime V9
+
+Status: proposed; owner approval required before any production apply.
+
+This artifact supersedes V2 through V8. The following V8 identities are void
+for approval and remain audit evidence only:
+
+- candidate/revision: `0b9c0284006c8d892c4617c2bfc16869bb6637f0`
+- artifact SHA-256: `ea9537613c462a07f3155263da5ad0f444bda0ba6773b49208de31b0acdef228`
+- exact diff SHA-256: `0867d9221ecfa7bcbe6b073a6a02da401bbed5087b9f2bd7fa494f2953b2ef2e`
+- every other proposal/content hash derived from V8 candidate bytes
+
+No V8 hash, ref, review, or receipt grants production execution authority.
+
+## Scope
+
+- Agent99 runtime bundle: 19 files, guarded by one producer/consumer parity
+  test.
+- Host110 backup payload: 18 ordered files, comprising 17 backup scripts and
+  `backup-health-textfile-exporter.py`.
+- Host110 remote stage: 21 unique basenames, comprising the ordered 18-file
+  payload, fixed executor, independent verifier, and `manifest.json`.
+- Fixed target: `wooo@192.168.0.110`, dispatched by Windows99 Agent99 from an
+  exact Gitea revision and digest manifest.
+- Gitea offline backup and container lifecycle changes remain excluded;
+  `backup-gitea.sh` has no candidate diff from the production base.
+
+## V8 Defects Closed
+
+### Durable Receipt Transaction
+
+The executor no longer captures `write_receipt` through command substitution
+and cannot mask an internal failure with a later `printf`. Receipt publication
+uses an exclusive temporary file, exact full-write check, file `fsync`,
+temporary-byte SHA-256 readback, no-replace hard link, directory `fsync`, exact
+final-byte/document/SHA-256 readback, temporary unlink, and a second directory
+`fsync`. Any write, link, fsync, cleanup, or readback failure is nonzero and
+removes a final path created by that failed attempt when possible.
+
+`APPLY_COMPLETE=1` is set only after the durable verified receipt passes this
+transaction. Stage and rollback prestate are never cleared before that point.
+If verified receipt publication fails, the EXIT path performs rollback first,
+writes a distinct failure receipt, and only removes rollback prestate after
+both rollback verification and durable failure-receipt publication succeed.
+Payload files, destination directories, rollback prestate files, and the
+rollback directory are explicitly fsynced before their corresponding durable
+claim can be published.
+
+### Run-Owned Temporary Files
+
+Every apply and rollback temporary destination is tracked for the exact run.
+Rollback removes and reads back all tracked paths, including a failure between
+`install` and `mv`. Canonical content/metadata verification plus zero hidden
+residue are both required before rollback can be called verified.
+
+### Rollback Truth
+
+Receipt schema `agent99_host110_backup_runtime_deploy_receipt_v2` records
+`rollbackAttempted`, `rollbackPerformed`, `rollbackVerified`, and
+`zeroResidueVerified` independently. A partial, unknown, or residue-bearing
+rollback terminates as `rollback_unverified`; only a fully restored and
+zero-residue transaction may terminate as `failed_rolled_back`.
+
+### Producer/Consumer Parity
+
+The integration test parses both actual sources and requires the broker's 18
+payload basenames to equal the executor payload in count, exact set, and exact
+order. It separately requires executor, verifier, and `manifest.json`, yielding
+21 unique remote-stage basenames.
+
+## Fault-Injection Contract
+
+The bounded local harness executes the real executor control flow against
+isolated temporary destinations and covers:
+
+- successful apply, durable receipt, verifier, and post-receipt prestate cleanup;
+- receipt write, link, fsync, and final-readback failures;
+- apply failure after hidden-temp installation but before canonical `mv`;
+- forced temp-cleanup failure and `rollback_unverified` evidence preservation.
+
+Every receipt fault must restore exact prestate, emit no success JSON, and
+produce a durable `failed_rolled_back` receipt. A cleanup fault must preserve
+`prestate.tsv`, expose rollback attempted/performed separately, and must not
+claim rollback verification.
+
+Fault hooks require an explicit test enable flag and a transformed
+non-production destination. The canonical `/backup/scripts` executor can never
+enable them, even if a fault environment variable is present.
+
+## Exact Diff Serialization
+
+Substitute the V9 Gitea live-ref SHA for `<candidate_git_sha>` and hash the
+exact stdout bytes from this command:
+
+```sh
+git diff --binary --full-index \
+  e7e3bcf8a5a8a19c1253d73f51d9dca248af0aa3..<candidate_git_sha> |
+  shasum -a 256
+```
+
+The review message independently binds the Gitea live ref and Git SHA, this
+tracked artifact path and bytes hash, and the serialized diff hash.
+
+## Apply Effects
+
+- Windows99 Agent99 runtime promotion writes the 19 runtime files plus bounded
+  manifest and receipt state.
+- Host110 Apply writes/replaces the 18 payload paths through one exclusive,
+  digest-bound filesystem transaction.
+- Apply does not run a backup, invoke a Gitea container lifecycle, sync Google
+  Drive, prune snapshots, restart a VM or service, or change a database,
+  network, or firewall.
+
+## Validation
+
+- The exact broker payload/order and 21-file stage parity test must pass.
+- Success and all six fault-injection paths must execute and pass.
+- Focused runtime, broker, backup, parity, Ansible, shell, and Python checks
+  must pass.
+- Changed PowerShell must parse on Windows99 with zero errors when applicable.
+- Central review must independently reproduce the live ref, artifact hash,
+  exact diff hash, 19/18/21 counts, and zero `backup-gitea.sh` diff.
+
+## Rollback
+
+- Source rollback reverts the exact V9 diff to
+  `e7e3bcf8a5a8a19c1253d73f51d9dca248af0aa3` without force-pushing.
+- Agent99 rollback restores the prior runtime files and manifest and verifies
+  prior hashes independently.
+- Host110 rollback restores all prior payload content, SHA-256, uid, gid, and
+  mode under the exclusive lock and proves zero run-owned temporary residue.
+- Any canonical, metadata, receipt, or residue mismatch terminates as
+  `rollback_unverified`; rollback prestate remains available for diagnosis.

scripts/backup/backup-offsite-readiness-gate.sh

@@ -9,14 +9,74 @@
 
 set -euo pipefail
 
-if [[ "${BASH_SOURCE[0]}" == /backup/scripts/* ]] && [ "${BACKUP_RUNTIME_SHARED_LOCK_HELD:-0}" != "1" ]; then
+resolve_backup_runtime_script_path() {
+  local raw_path="$1" candidate="" resolved="" resolved_directory=""
+  [ -n "${raw_path}" ] || return 1
+  case "${raw_path}" in /*) candidate="${raw_path}" ;; *) candidate="${PWD}/${raw_path}" ;; esac
+  if command -v realpath >/dev/null 2>&1; then
+    resolved="$(realpath -e -- "${candidate}" 2>/dev/null || realpath -- "${candidate}" 2>/dev/null)" || resolved=""
+    if [ -n "${resolved}" ]; then printf '%s\n' "${resolved}"; return 0; fi
+  fi
+  if command -v readlink >/dev/null 2>&1; then
+    resolved="$(readlink -f -- "${candidate}" 2>/dev/null)" || resolved=""
+    if [ -n "${resolved}" ]; then printf '%s\n' "${resolved}"; return 0; fi
+  fi
+  [ ! -L "${candidate}" ] || return 1
+  resolved_directory="$(cd -P -- "$(dirname -- "${candidate}")" 2>/dev/null && pwd -P)" || return 1
+  [ -e "${resolved_directory}/$(basename -- "${candidate}")" ] || return 1
+  printf '%s/%s\n' "${resolved_directory}" "$(basename -- "${candidate}")"
+}
+
+backup_runtime_inherited_fd_status() {
+  local expected_path="$1" fd_path="" fd_target=""
+  if [ -d "/proc/$$/fd" ]; then
+    fd_path="/proc/$$/fd/197"
+    [ -e "${fd_path}" ] || [ -L "${fd_path}" ] || return 1
+    fd_target="$(resolve_backup_runtime_script_path "${fd_path}")" || return 2
+    [ "${fd_target}" = "${expected_path}" ] || return 2
+    return 0
+  fi
+  fd_path="/dev/fd/197"
+  [ -e "${fd_path}" ] || [ -L "${fd_path}" ] || return 1
+  command -v python3 >/dev/null 2>&1 || return 2
+  fd_target="$(python3 - <<'PY'
+import fcntl
+import os
+
+try:
+    target = os.readlink("/dev/fd/197")
+except OSError:
+    value = fcntl.fcntl(197, getattr(fcntl, "F_GETPATH", 50), b"\0" * 1024)
+    target = os.fsdecode(value.split(b"\0", 1)[0])
+print(os.path.realpath(target))
+PY
+  )" || return 2
+  [ "${fd_target}" = "${expected_path}" ] || return 2
+}
+
+runtime_script_path="$(resolve_backup_runtime_script_path "${BASH_SOURCE[0]:-}")" || {
+  echo "backup runtime gate unavailable: script identity unresolved" >&2
+  exit 69
+}
+if [[ "${runtime_script_path}" == /backup/scripts/* ]]; then
   command -v flock >/dev/null 2>&1 || { echo "backup runtime gate unavailable" >&2; exit 69; }
   [ ! -L /tmp/agent99-host110-backup-runtime.lock ] || { echo "backup runtime gate unsafe" >&2; exit 69; }
   (umask 077; : >> /tmp/agent99-host110-backup-runtime.lock)
   [ -f /tmp/agent99-host110-backup-runtime.lock ] && [ -O /tmp/agent99-host110-backup-runtime.lock ] || { echo "backup runtime gate owner invalid" >&2; exit 69; }
-  exec 197>>/tmp/agent99-host110-backup-runtime.lock
+  runtime_lock_path="$(resolve_backup_runtime_script_path /tmp/agent99-host110-backup-runtime.lock)" \
+    || { echo "backup runtime gate unavailable: lock identity unresolved" >&2; exit 69; }
+  if backup_runtime_inherited_fd_status "${runtime_lock_path}"; then
+    :
+  else
+    inherited_fd_status=$?
+    if [ "${inherited_fd_status}" -eq 1 ]; then
+      exec 197>>/tmp/agent99-host110-backup-runtime.lock
+    else
+      echo "backup runtime gate unsafe: inherited fd 197 identity mismatch" >&2
+      exit 69
+    fi
+  fi
   flock -s -w 60 197 || { echo "backup runtime deployment is active; retry later" >&2; exit 75; }
-  export BACKUP_RUNTIME_SHARED_LOCK_HELD=1
 fi
 
 BACKUP_BASE="${BACKUP_BASE:-/backup}"

scripts/backup/common.sh

@@ -3,14 +3,78 @@
 
 # Production backup entrypoints share this stable gate. Agent99 takes the
 # exclusive side while promoting a complete, digest-bound runtime bundle.
+resolve_backup_runtime_source_path() {
+    local raw_path="$1"
+    local candidate=""
+    local resolved=""
+    local resolved_directory=""
+    [ -n "${raw_path}" ] || return 1
+    case "${raw_path}" in
+        /*) candidate="${raw_path}" ;;
+        *) candidate="${PWD}/${raw_path}" ;;
+    esac
+    if command -v realpath >/dev/null 2>&1; then
+        resolved="$(realpath -e -- "${candidate}" 2>/dev/null || realpath -- "${candidate}" 2>/dev/null)" || resolved=""
+        if [ -n "${resolved}" ]; then
+            printf '%s\n' "${resolved}"
+            return 0
+        fi
+    fi
+    if command -v readlink >/dev/null 2>&1; then
+        resolved="$(readlink -f -- "${candidate}" 2>/dev/null)" || resolved=""
+        if [ -n "${resolved}" ]; then
+            printf '%s\n' "${resolved}"
+            return 0
+        fi
+    fi
+    [ ! -L "${candidate}" ] || return 1
+    resolved_directory="$(cd -P -- "$(dirname -- "${candidate}")" 2>/dev/null && pwd -P)" || return 1
+    [ -e "${resolved_directory}/$(basename -- "${candidate}")" ] || return 1
+    printf '%s/%s\n' "${resolved_directory}" "$(basename -- "${candidate}")"
+}
+
+backup_runtime_inherited_fd_status() {
+    local expected_path="$1"
+    local fd_path=""
+    local fd_target=""
+    if [ -d "/proc/$$/fd" ]; then
+        fd_path="/proc/$$/fd/197"
+        [ -e "${fd_path}" ] || [ -L "${fd_path}" ] || return 1
+        fd_target="$(resolve_backup_runtime_source_path "${fd_path}")" || return 2
+        [ "${fd_target}" = "${expected_path}" ] || return 2
+        return 0
+    fi
+    fd_path="/dev/fd/197"
+    [ -e "${fd_path}" ] || [ -L "${fd_path}" ] || return 1
+    command -v python3 >/dev/null 2>&1 || return 2
+    fd_target="$(python3 - <<'PY'
+import fcntl
+import os
+
+try:
+    target = os.readlink("/dev/fd/197")
+except OSError:
+    value = fcntl.fcntl(197, getattr(fcntl, "F_GETPATH", 50), b"\0" * 1024)
+    target = os.fsdecode(value.split(b"\0", 1)[0])
+print(os.path.realpath(target))
+PY
+    )" || return 2
+    [ "${fd_target}" = "${expected_path}" ] || return 2
+}
+
 acquire_backup_runtime_shared_lock() {
-    local caller_path="${BASH_SOURCE[1]:-${BASH_SOURCE[0]}}"
+    local caller_path=""
     local lock_path="/tmp/agent99-host110-backup-runtime.lock"
+    local lock_canonical=""
+    local inherited_fd_status=0
+    caller_path="$(resolve_backup_runtime_source_path "${BASH_SOURCE[1]:-${BASH_SOURCE[0]:-}}")" || {
+        echo "backup runtime gate unavailable: caller identity unresolved" >&2
+        return 69
+    }
     case "${caller_path}" in
         /backup/scripts/*) ;;
         *) return 0 ;;
     esac
-    [ "${BACKUP_RUNTIME_SHARED_LOCK_HELD:-0}" != "1" ] || return 0
     command -v flock >/dev/null 2>&1 || {
         echo "backup runtime gate unavailable: flock missing" >&2
         return 69
@@ -21,12 +85,25 @@ acquire_backup_runtime_shared_lock() {
     }
     (umask 077; : >> "${lock_path}") || return 69
     [ -f "${lock_path}" ] && [ -O "${lock_path}" ] || return 69
-    exec 197>>"${lock_path}"
+    lock_canonical="$(resolve_backup_runtime_source_path "${lock_path}")" || {
+        echo "backup runtime gate unavailable: lock identity unresolved" >&2
+        return 69
+    }
+    if backup_runtime_inherited_fd_status "${lock_canonical}"; then
+        :
+    else
+        inherited_fd_status=$?
+        if [ "${inherited_fd_status}" -eq 1 ]; then
+            exec 197>>"${lock_path}"
+        else
+            echo "backup runtime gate unsafe: inherited fd 197 identity mismatch" >&2
+            return 69
+        fi
+    fi
     flock -s -w 60 197 || {
         echo "backup runtime deployment is active; retry later" >&2
         return 75
     }
-    export BACKUP_RUNTIME_SHARED_LOCK_HELD=1
 }
 
 acquire_backup_runtime_shared_lock || {

scripts/backup/gitea-full-backup-restore-drill.sh

@@ -5,14 +5,74 @@
 
 set -euo pipefail
 
-if [[ "${BASH_SOURCE[0]}" == /backup/scripts/* ]] && [ "${BACKUP_RUNTIME_SHARED_LOCK_HELD:-0}" != "1" ]; then
+resolve_backup_runtime_script_path() {
+  local raw_path="$1" candidate="" resolved="" resolved_directory=""
+  [ -n "${raw_path}" ] || return 1
+  case "${raw_path}" in /*) candidate="${raw_path}" ;; *) candidate="${PWD}/${raw_path}" ;; esac
+  if command -v realpath >/dev/null 2>&1; then
+    resolved="$(realpath -e -- "${candidate}" 2>/dev/null || realpath -- "${candidate}" 2>/dev/null)" || resolved=""
+    if [ -n "${resolved}" ]; then printf '%s\n' "${resolved}"; return 0; fi
+  fi
+  if command -v readlink >/dev/null 2>&1; then
+    resolved="$(readlink -f -- "${candidate}" 2>/dev/null)" || resolved=""
+    if [ -n "${resolved}" ]; then printf '%s\n' "${resolved}"; return 0; fi
+  fi
+  [ ! -L "${candidate}" ] || return 1
+  resolved_directory="$(cd -P -- "$(dirname -- "${candidate}")" 2>/dev/null && pwd -P)" || return 1
+  [ -e "${resolved_directory}/$(basename -- "${candidate}")" ] || return 1
+  printf '%s/%s\n' "${resolved_directory}" "$(basename -- "${candidate}")"
+}
+
+backup_runtime_inherited_fd_status() {
+  local expected_path="$1" fd_path="" fd_target=""
+  if [ -d "/proc/$$/fd" ]; then
+    fd_path="/proc/$$/fd/197"
+    [ -e "${fd_path}" ] || [ -L "${fd_path}" ] || return 1
+    fd_target="$(resolve_backup_runtime_script_path "${fd_path}")" || return 2
+    [ "${fd_target}" = "${expected_path}" ] || return 2
+    return 0
+  fi
+  fd_path="/dev/fd/197"
+  [ -e "${fd_path}" ] || [ -L "${fd_path}" ] || return 1
+  command -v python3 >/dev/null 2>&1 || return 2
+  fd_target="$(python3 - <<'PY'
+import fcntl
+import os
+
+try:
+    target = os.readlink("/dev/fd/197")
+except OSError:
+    value = fcntl.fcntl(197, getattr(fcntl, "F_GETPATH", 50), b"\0" * 1024)
+    target = os.fsdecode(value.split(b"\0", 1)[0])
+print(os.path.realpath(target))
+PY
+  )" || return 2
+  [ "${fd_target}" = "${expected_path}" ] || return 2
+}
+
+runtime_script_path="$(resolve_backup_runtime_script_path "${BASH_SOURCE[0]:-}")" || {
+  echo "backup runtime gate unavailable: script identity unresolved" >&2
+  exit 69
+}
+if [[ "${runtime_script_path}" == /backup/scripts/* ]]; then
   command -v flock >/dev/null 2>&1 || { echo "backup runtime gate unavailable" >&2; exit 69; }
   [ ! -L /tmp/agent99-host110-backup-runtime.lock ] || { echo "backup runtime gate unsafe" >&2; exit 69; }
   (umask 077; : >> /tmp/agent99-host110-backup-runtime.lock)
   [ -f /tmp/agent99-host110-backup-runtime.lock ] && [ -O /tmp/agent99-host110-backup-runtime.lock ] || { echo "backup runtime gate owner invalid" >&2; exit 69; }
-  exec 197>>/tmp/agent99-host110-backup-runtime.lock
+  runtime_lock_path="$(resolve_backup_runtime_script_path /tmp/agent99-host110-backup-runtime.lock)" \
+    || { echo "backup runtime gate unavailable: lock identity unresolved" >&2; exit 69; }
+  if backup_runtime_inherited_fd_status "${runtime_lock_path}"; then
+    :
+  else
+    inherited_fd_status=$?
+    if [ "${inherited_fd_status}" -eq 1 ]; then
+      exec 197>>/tmp/agent99-host110-backup-runtime.lock
+    else
+      echo "backup runtime gate unsafe: inherited fd 197 identity mismatch" >&2
+      exit 69
+    fi
+  fi
   flock -s -w 60 197 || { echo "backup runtime deployment is active; retry later" >&2; exit 75; }
-  export BACKUP_RUNTIME_SHARED_LOCK_HELD=1
 fi
 
 DUMP_ZIP="${AIOPS_GITEA_FULL_BACKUP_DRILL_DUMP_ZIP:-}"

scripts/backup/host110-backup-runtime-executor.sh

@@ -44,13 +44,23 @@ EXECUTOR_DIGEST=""
 VERIFIER_DIGEST=""
 STAGE_DIR=""
 ROLLBACK_DIR=""
+RECEIPT_PATH=""
+TERMINAL_RECEIPT_PATH=""
 APPLY_STARTED=0
 APPLY_COMPLETE=0
+COMMIT_CRITICAL=0
+DEFERRED_SIGNAL=""
+DEFERRED_SIGNAL_EXIT=0
+ROLLBACK_ATTEMPTED=0
+ROLLBACK_PERFORMED=0
 ROLLBACK_VERIFIED=0
+RUN_TEMP_RESIDUE_VERIFIED=0
+FAULT_INJECTION_ENABLED=0
 declare -A FILE_EXISTED=()
 declare -A PREVIOUS_DIGEST=()
 declare -A PREVIOUS_METADATA=()
 declare -A EXPECTED_DIGEST=()
+declare -A RUN_OWNED_TEMP_PATHS=()
 
 usage() {
   printf '%s\n' \
@@ -96,6 +106,18 @@ case "$MODE" in check|apply|verify) ;; *) fail "invalid_mode" ;; esac
 [[ "$RUN_ID" =~ ^[A-Za-z0-9][A-Za-z0-9._-]{0,95}$ ]] || fail "invalid_run_id"
 expected_source_stage="/tmp/agent99-host110-backup-runtime-${RUN_ID}"
 [ "$SOURCE_STAGE" = "$expected_source_stage" ] || fail "invalid_source_stage"
+RECEIPT_PATH="$STATUS_ROOT/agent99-backup-runtime-deploy-${RUN_ID}.json"
+TERMINAL_RECEIPT_PATH="$STATUS_ROOT/agent99-backup-runtime-terminal-${RUN_ID}.json"
+if [ "${HOST110_BACKUP_RUNTIME_ENABLE_TEST_FAULTS:-}" = "1" ] \
+  && [ "$DEST_ROOT" != "/backup/scripts" ]; then
+  FAULT_INJECTION_ENABLED=1
+fi
+if [ "$FAULT_INJECTION_ENABLED" -eq 1 ]; then
+  case "${HOST110_BACKUP_RUNTIME_TEST_COMMIT_SIGNAL:-}" in ""|INT|HUP|TERM) ;; *) fail "invalid_test_commit_signal" ;; esac
+  case "${HOST110_BACKUP_RUNTIME_TEST_TERMINAL_SIGNAL:-}" in ""|INT|HUP|TERM) ;; *) fail "invalid_test_terminal_signal" ;; esac
+  case "${HOST110_BACKUP_RUNTIME_TEST_TERMINAL_RECEIPT_FAULT:-}" in ""|write|link|fsync|readback) ;; *) fail "invalid_test_terminal_receipt_fault" ;; esac
+  case "${HOST110_BACKUP_RUNTIME_TEST_CLEANUP_FAULT:-}" in ""|stage|rollback_prestate) ;; *) fail "invalid_test_cleanup_fault" ;; esac
+fi
 
 for command_name in awk bash cp dirname flock grep hostname id install mv pgrep python3 readlink rm sha256sum stat timeout tr; do
   command -v "$command_name" >/dev/null 2>&1 || fail "required_command_missing_${command_name}"
@@ -174,10 +196,10 @@ working_digest() {
   || fail "verifier_identity_failed"
 
 validate_file() {
-  local path="$1"
-  case "$path" in
-    *.sh) bash -n "$path" ;;
-    *.py) python3 -c 'import ast, pathlib, sys; ast.parse(pathlib.Path(sys.argv[1]).read_text(encoding="utf-8"))' "$path" ;;
+  local validation_path="$1"
+  case "$validation_path" in
+    *.sh) bash -n "$validation_path" ;;
+    *.py) python3 -c 'import ast, pathlib, sys; ast.parse(pathlib.Path(sys.argv[1]).read_text(encoding="utf-8"))' "$validation_path" ;;
     *) return 64 ;;
   esac
 }
@@ -222,12 +244,75 @@ verify_destination() {
   done
 }
 
+fsync_paths_and_parents() {
+  python3 - "$@" <<'PY'
+import os
+import stat
+import sys
+from pathlib import Path
+
+parents = set()
+for raw_path in sys.argv[1:]:
+    path = Path(raw_path)
+    parents.add(path.parent)
+    if not os.path.lexists(path):
+        continue
+    if path.is_symlink() or not path.is_file():
+        raise SystemExit(76)
+    flags = os.O_RDONLY | getattr(os, "O_NOFOLLOW", 0)
+    descriptor = os.open(path, flags)
+    try:
+        if not stat.S_ISREG(os.fstat(descriptor).st_mode):
+            raise SystemExit(76)
+        os.fsync(descriptor)
+    finally:
+        os.close(descriptor)
+for parent in sorted(parents, key=str):
+    if parent.is_symlink() or not parent.is_dir():
+        raise SystemExit(76)
+    flags = os.O_RDONLY | getattr(os, "O_DIRECTORY", 0) | getattr(os, "O_NOFOLLOW", 0)
+    descriptor = os.open(parent, flags)
+    try:
+        os.fsync(descriptor)
+    finally:
+        os.close(descriptor)
+PY
+}
+
+fsync_destination_state() {
+  local name dest_path
+  local -a fsync_targets=()
+  for name in "${PAYLOAD_FILES[@]}"; do
+    dest_path="$(destination_path "$name")"
+    fsync_targets+=("$dest_path")
+  done
+  fsync_paths_and_parents "${fsync_targets[@]}"
+}
+
+fsync_rollback_prestate() {
+  local name
+  local -a fsync_targets=("$ROLLBACK_DIR/prestate.tsv")
+  for name in "${PAYLOAD_FILES[@]}"; do
+    if [ "${FILE_EXISTED[$name]:-}" = "1" ]; then
+      fsync_targets+=("$ROLLBACK_DIR/$name")
+    fi
+  done
+  fsync_paths_and_parents "${fsync_targets[@]}"
+}
+
 write_receipt() {
-  local status="$1"
-  local rollback_verified="$2"
-  local receipt_path="$STATUS_ROOT/agent99-backup-runtime-deploy-${RUN_ID}.json"
-  install -d -m 700 "$STATUS_ROOT"
-  python3 - "$receipt_path" "$status" "$SOURCE_REVISION" "$SOURCE_HEAD" "$RUN_ID" "$rollback_verified" "$VERIFIER_DIGEST" <<'PY'
+  local receipt_status="$1"
+  local rollback_attempted="$2"
+  local rollback_performed="$3"
+  local rollback_verified="$4"
+  local zero_residue_verified="$5"
+  install -d -m 700 "$STATUS_ROOT" || return 1
+  [ -d "$STATUS_ROOT" ] && [ ! -L "$STATUS_ROOT" ] || return 1
+  [ "$(stat -c '%U:%G:%a' "$STATUS_ROOT")" = "wooo:wooo:700" ] || return 1
+  if ! python3 - "$RECEIPT_PATH" "$receipt_status" "$SOURCE_REVISION" "$SOURCE_HEAD" "$RUN_ID" \
+    "$rollback_attempted" "$rollback_performed" "$rollback_verified" \
+    "$zero_residue_verified" "$VERIFIER_DIGEST" "$FAULT_INJECTION_ENABLED" <<'PY'
+import hashlib
 import json
 import os
 import sys
@@ -235,64 +320,343 @@ import time
 from pathlib import Path
 
 path = Path(sys.argv[1])
+status = sys.argv[2]
+rollback_attempted = sys.argv[6] == "1"
+rollback_performed = sys.argv[7] == "1"
+rollback_verified = sys.argv[8] == "1"
+zero_residue_verified = sys.argv[9] == "1"
+if status not in {"payload_verified", "failed_rolled_back", "rollback_unverified"}:
+    raise SystemExit(78)
+if status == "payload_verified" and (rollback_attempted or rollback_performed or rollback_verified or not zero_residue_verified):
+    raise SystemExit(78)
+if status == "failed_rolled_back" and not (
+    rollback_attempted and rollback_performed and rollback_verified and zero_residue_verified
+):
+    raise SystemExit(78)
+if status == "rollback_unverified" and (not rollback_attempted or rollback_verified):
+    raise SystemExit(78)
 document = {
-    "schemaVersion": "agent99_host110_backup_runtime_deploy_receipt_v1",
-    "status": sys.argv[2],
+    "schemaVersion": "agent99_host110_backup_runtime_deploy_receipt_v3",
+    "status": status,
     "sourceRevision": sys.argv[3],
     "sourceHead": sys.argv[4],
     "runId": sys.argv[5],
     "fileCount": 18,
     "backupScriptFileCount": 17,
     "backupHealthExporterIncluded": True,
-    "rollbackPerformed": sys.argv[6] == "1",
-    "rollbackVerified": sys.argv[6] == "1",
-    "verifierSha256": sys.argv[7],
+    "rollbackAttempted": rollback_attempted,
+    "rollbackPerformed": rollback_performed,
+    "rollbackVerified": rollback_verified,
+    "zeroResidueVerified": zero_residue_verified,
+    "zeroResidueScope": "run_owned_destination_temps",
+    "verifierSha256": sys.argv[10],
     "executorHost": "192.168.0.110",
     "productionServiceRestarted": False,
     "secretValuesRead": False,
     "writtenAt": int(time.time()),
 }
+payload = (json.dumps(document, ensure_ascii=True, sort_keys=True, separators=(",", ":")) + "\n").encode("utf-8")
+expected_digest = hashlib.sha256(payload).hexdigest()
 temporary = path.with_name(f".{path.name}.tmp-{os.getpid()}")
-temporary.write_text(json.dumps(document, ensure_ascii=True, sort_keys=True) + "\n", encoding="utf-8")
-os.chmod(temporary, 0o600)
+fault_enabled = sys.argv[11] == "1"
+fault = (
+    os.environ.get("HOST110_BACKUP_RUNTIME_TEST_RECEIPT_FAULT", "")
+    if status == "payload_verified" and fault_enabled
+    else ""
+)
+if fault not in {"", "write", "link", "fsync", "readback"}:
+    raise SystemExit(78)
+created_final = False
+directory_fd = None
 try:
+    if os.path.lexists(path) or os.path.lexists(temporary):
+        raise FileExistsError(path)
+    if fault == "write":
+        raise OSError("fault_injected_receipt_write")
+    descriptor = os.open(temporary, os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o600)
+    with os.fdopen(descriptor, "wb") as handle:
+        if handle.write(payload) != len(payload):
+            raise OSError("receipt_short_write")
+        handle.flush()
+        if fault == "fsync":
+            raise OSError("fault_injected_receipt_fsync")
+        os.fsync(handle.fileno())
+    os.chmod(temporary, 0o600)
+    temporary_readback = temporary.read_bytes()
+    if temporary_readback != payload or hashlib.sha256(temporary_readback).hexdigest() != expected_digest:
+        raise OSError("receipt_temporary_readback_failed")
+    if fault == "link":
+        raise OSError("fault_injected_receipt_link")
     os.link(temporary, path)
+    created_final = True
+    directory_flags = os.O_RDONLY | getattr(os, "O_DIRECTORY", 0)
+    directory_fd = os.open(path.parent, directory_flags)
+    os.fsync(directory_fd)
+    if fault == "readback":
+        raise OSError("fault_injected_receipt_readback")
+    readback = path.read_bytes()
+    if readback != payload or hashlib.sha256(readback).hexdigest() != expected_digest:
+        raise OSError("receipt_final_readback_failed")
+    if json.loads(readback.decode("utf-8")) != document:
+        raise OSError("receipt_document_readback_failed")
+    temporary.unlink()
+    os.fsync(directory_fd)
+except BaseException:
+    try:
+        if created_final:
+            path.unlink(missing_ok=True)
+        temporary.unlink(missing_ok=True)
+        if directory_fd is None and path.parent.is_dir():
+            directory_flags = os.O_RDONLY | getattr(os, "O_DIRECTORY", 0)
+            directory_fd = os.open(path.parent, directory_flags)
+        if directory_fd is not None:
+            os.fsync(directory_fd)
+    finally:
+        raise
 finally:
-    temporary.unlink(missing_ok=True)
+    if directory_fd is not None:
+        os.close(directory_fd)
 PY
-  printf '%s' "$receipt_path"
+  then
+    return 1
+  fi
+  [ -f "$RECEIPT_PATH" ] && [ ! -L "$RECEIPT_PATH" ] || return 1
+  return 0
+}
+
+write_terminal_receipt() {
+  local terminal_status="$1"
+  local stage_cleanup_verified="$2"
+  local rollback_prestate_cleanup_verified="$3"
+  local deferred_signal="$4"
+  local terminal_exit_code="$5"
+  install -d -m 700 "$STATUS_ROOT" || return 1
+  [ -d "$STATUS_ROOT" ] && [ ! -L "$STATUS_ROOT" ] || return 1
+  [ "$(stat -c '%U:%G:%a' "$STATUS_ROOT")" = "wooo:wooo:700" ] || return 1
+  if ! python3 - "$TERMINAL_RECEIPT_PATH" "$RECEIPT_PATH" "$terminal_status" \
+    "$SOURCE_REVISION" "$SOURCE_HEAD" "$RUN_ID" "$stage_cleanup_verified" \
+    "$rollback_prestate_cleanup_verified" "$deferred_signal" "$terminal_exit_code" \
+    "$VERIFIER_DIGEST" "$FAULT_INJECTION_ENABLED" <<'PY'
+import hashlib
+import json
+import os
+import signal
+import sys
+import time
+from pathlib import Path
+
+path = Path(sys.argv[1])
+payload_receipt_path = Path(sys.argv[2])
+status = sys.argv[3]
+source_revision = sys.argv[4]
+source_head = sys.argv[5]
+run_id = sys.argv[6]
+stage_cleanup_verified = sys.argv[7] == "1"
+rollback_prestate_cleanup_verified = sys.argv[8] == "1"
+deferred_signal = sys.argv[9]
+terminal_exit_code = int(sys.argv[10])
+verifier_digest = sys.argv[11]
+fault_enabled = sys.argv[12] == "1"
+signal_exit_codes = {"INT": 130, "HUP": 129, "TERM": 143}
+
+terminal_signal = os.environ.get("HOST110_BACKUP_RUNTIME_TEST_TERMINAL_SIGNAL", "") if fault_enabled else ""
+terminal_fault = os.environ.get("HOST110_BACKUP_RUNTIME_TEST_TERMINAL_RECEIPT_FAULT", "") if fault_enabled else ""
+if terminal_signal:
+    os.kill(os.getppid(), getattr(signal, f"SIG{terminal_signal}"))
+    time.sleep(0.05)
+
+try:
+    payload_receipt = json.loads(payload_receipt_path.read_text(encoding="utf-8"))
+except (OSError, json.JSONDecodeError):
+    raise SystemExit(79)
+if not (
+    payload_receipt.get("schemaVersion") == "agent99_host110_backup_runtime_deploy_receipt_v3"
+    and payload_receipt.get("status") == "payload_verified"
+    and payload_receipt.get("sourceRevision") == source_revision
+    and payload_receipt.get("sourceHead") == source_head
+    and payload_receipt.get("runId") == run_id
+    and payload_receipt.get("zeroResidueVerified") is True
+):
+    raise SystemExit(79)
+
+if status == "verified":
+    valid = (
+        stage_cleanup_verified
+        and rollback_prestate_cleanup_verified
+        and not deferred_signal
+        and terminal_exit_code == 0
+    )
+elif status == "cleanup_pending":
+    valid = (
+        not (stage_cleanup_verified and rollback_prestate_cleanup_verified)
+        and deferred_signal in {"", *signal_exit_codes}
+        and terminal_exit_code != 0
+    )
+elif status == "committed_signal_deferred":
+    valid = (
+        stage_cleanup_verified
+        and rollback_prestate_cleanup_verified
+        and deferred_signal in signal_exit_codes
+        and terminal_exit_code == signal_exit_codes[deferred_signal]
+    )
+else:
+    valid = False
+if not valid:
+    raise SystemExit(79)
+
+document = {
+    "schemaVersion": "agent99_host110_backup_runtime_terminal_receipt_v1",
+    "status": status,
+    "ok": status == "verified",
+    "payloadCommitted": True,
+    "payloadReceipt": str(payload_receipt_path),
+    "sourceRevision": source_revision,
+    "sourceHead": source_head,
+    "runId": run_id,
+    "fileCount": 18,
+    "backupScriptFileCount": 17,
+    "backupHealthExporterIncluded": True,
+    "stageCleanupVerified": stage_cleanup_verified,
+    "rollbackPrestateCleanupVerified": rollback_prestate_cleanup_verified,
+    "cleanupVerified": stage_cleanup_verified and rollback_prestate_cleanup_verified,
+    "independentVerifierVerified": True,
+    "zeroResidueScope": "run_owned_destination_temps_and_internal_stage_prestate",
+    "deferredSignal": deferred_signal or None,
+    "terminalExitCode": terminal_exit_code,
+    "verifierSha256": verifier_digest,
+    "executorHost": "192.168.0.110",
+    "productionServiceRestarted": False,
+    "secretValuesRead": False,
+    "writtenAt": int(time.time()),
+}
+payload = (json.dumps(document, ensure_ascii=True, sort_keys=True, separators=(",", ":")) + "\n").encode("utf-8")
+expected_digest = hashlib.sha256(payload).hexdigest()
+temporary = path.with_name(f".{path.name}.tmp-{os.getpid()}")
+created_final = False
+directory_fd = None
+try:
+    if os.path.lexists(path) or os.path.lexists(temporary):
+        raise FileExistsError(path)
+    if terminal_fault == "write":
+        raise OSError("fault_injected_terminal_receipt_write")
+    descriptor = os.open(temporary, os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o600)
+    with os.fdopen(descriptor, "wb") as handle:
+        if handle.write(payload) != len(payload):
+            raise OSError("terminal_receipt_short_write")
+        handle.flush()
+        if terminal_fault == "fsync":
+            raise OSError("fault_injected_terminal_receipt_fsync")
+        os.fsync(handle.fileno())
+    os.chmod(temporary, 0o600)
+    temporary_readback = temporary.read_bytes()
+    if temporary_readback != payload or hashlib.sha256(temporary_readback).hexdigest() != expected_digest:
+        raise OSError("terminal_receipt_temporary_readback_failed")
+    if terminal_fault == "link":
+        raise OSError("fault_injected_terminal_receipt_link")
+    os.link(temporary, path)
+    created_final = True
+    directory_flags = os.O_RDONLY | getattr(os, "O_DIRECTORY", 0)
+    directory_fd = os.open(path.parent, directory_flags)
+    os.fsync(directory_fd)
+    if terminal_fault == "readback":
+        raise OSError("fault_injected_terminal_receipt_readback")
+    readback = path.read_bytes()
+    if readback != payload or hashlib.sha256(readback).hexdigest() != expected_digest:
+        raise OSError("terminal_receipt_final_readback_failed")
+    if json.loads(readback.decode("utf-8")) != document:
+        raise OSError("terminal_receipt_document_readback_failed")
+    temporary.unlink()
+    os.fsync(directory_fd)
+except BaseException:
+    try:
+        if created_final:
+            path.unlink(missing_ok=True)
+        temporary.unlink(missing_ok=True)
+        if directory_fd is None and path.parent.is_dir():
+            directory_flags = os.O_RDONLY | getattr(os, "O_DIRECTORY", 0)
+            directory_fd = os.open(path.parent, directory_flags)
+        if directory_fd is not None:
+            os.fsync(directory_fd)
+    finally:
+        raise
+finally:
+    if directory_fd is not None:
+        os.close(directory_fd)
+PY
+  then
+    return 1
+  fi
+  [ -f "$TERMINAL_RECEIPT_PATH" ] && [ ! -L "$TERMINAL_RECEIPT_PATH" ] || return 1
+  return 0
 }
 
 record_prestate() {
   local name dest_path digest metadata
-  : > "$ROLLBACK_DIR/prestate.tsv"
-  chmod 600 "$ROLLBACK_DIR/prestate.tsv"
+  : > "$ROLLBACK_DIR/prestate.tsv" || return 74
+  chmod 600 "$ROLLBACK_DIR/prestate.tsv" || return 74
   for name in "${PAYLOAD_FILES[@]}"; do
     dest_path="$(destination_path "$name")"
     if [ -f "$dest_path" ] && [ ! -L "$dest_path" ]; then
       [ "$(stat -c '%U:%G' "$dest_path")" = "wooo:wooo" ] || return 71
       FILE_EXISTED[$name]=1
-      digest="$(working_digest "$dest_path")"
-      metadata="$(stat -c '%u:%g:%a' "$dest_path")"
+      digest="$(working_digest "$dest_path")" || return 72
+      metadata="$(stat -c '%u:%g:%a' "$dest_path")" || return 72
       PREVIOUS_DIGEST[$name]="$digest"
       PREVIOUS_METADATA[$name]="$metadata"
-      printf '%s\t1\t%s\t%s\n' "$name" "$digest" "$metadata" >> "$ROLLBACK_DIR/prestate.tsv"
-      cp -p -- "$dest_path" "$ROLLBACK_DIR/$name"
+      printf '%s\t1\t%s\t%s\n' "$name" "$digest" "$metadata" >> "$ROLLBACK_DIR/prestate.tsv" || return 72
+      cp -p -- "$dest_path" "$ROLLBACK_DIR/$name" || return 72
       [ "$(working_digest "$ROLLBACK_DIR/$name")" = "$digest" ] || return 72
     elif [ ! -e "$dest_path" ]; then
       FILE_EXISTED[$name]=0
       PREVIOUS_DIGEST[$name]="-"
       PREVIOUS_METADATA[$name]="-"
-      printf '%s\t0\t-\t-\n' "$name" >> "$ROLLBACK_DIR/prestate.tsv"
+      printf '%s\t0\t-\t-\n' "$name" >> "$ROLLBACK_DIR/prestate.tsv" || return 72
     else
       return 73
     fi
   done
+  fsync_rollback_prestate || return 75
+}
+
+register_run_owned_temp() {
+  RUN_OWNED_TEMP_PATHS["$1"]=1
+}
+
+verify_run_owned_temp_absence() {
+  local temporary
+  for temporary in "${!RUN_OWNED_TEMP_PATHS[@]}"; do
+    [ ! -e "$temporary" ] && [ ! -L "$temporary" ] || return 1
+  done
+}
+
+cleanup_run_owned_temps() {
+  local temporary failed=0 preserved=0
+  local fault=""
+  if [ "$FAULT_INJECTION_ENABLED" -eq 1 ]; then
+    fault="${HOST110_BACKUP_RUNTIME_TEST_ROLLBACK_FAULT:-}"
+  fi
+  for temporary in "${!RUN_OWNED_TEMP_PATHS[@]}"; do
+    if [ "$fault" = "preserve_first_temp" ] \
+      && [ "$preserved" -eq 0 ] \
+      && { [ -e "$temporary" ] || [ -L "$temporary" ]; }; then
+      preserved=1
+      failed=1
+      continue
+    fi
+    rm -f -- "$temporary" || failed=1
+  done
+  verify_run_owned_temp_absence || failed=1
+  [ "$failed" -eq 0 ]
 }
 
 rollback_transaction() {
   local name dest_path destination_parent backup_path temporary failed=0
+  ROLLBACK_ATTEMPTED=1
+  ROLLBACK_PERFORMED=0
+  ROLLBACK_VERIFIED=0
+  RUN_TEMP_RESIDUE_VERIFIED=0
   set +e
+  cleanup_run_owned_temps || failed=1
   for name in "${PAYLOAD_FILES[@]}"; do
     [ -n "${FILE_EXISTED[$name]+x}" ] || { failed=1; continue; }
     dest_path="$(destination_path "$name")"
@@ -300,13 +664,22 @@ rollback_transaction() {
       backup_path="$ROLLBACK_DIR/$name"
       destination_parent="$(dirname "$dest_path")"
       temporary="$destination_parent/.${name}.agent99-rollback-${RUN_ID}"
-      cp -p -- "$backup_path" "$temporary" \
-        && mv -f -- "$temporary" "$dest_path" \
-        || failed=1
+      register_run_owned_temp "$temporary"
+      if cp -p -- "$backup_path" "$temporary" && mv -f -- "$temporary" "$dest_path"; then
+        ROLLBACK_PERFORMED=1
+      else
+        failed=1
+      fi
     else
-      rm -f -- "$dest_path" || failed=1
+      if rm -f -- "$dest_path"; then
+        ROLLBACK_PERFORMED=1
+      else
+        failed=1
+      fi
     fi
   done
+  cleanup_run_owned_temps || failed=1
+  fsync_destination_state || failed=1
   for name in "${PAYLOAD_FILES[@]}"; do
     dest_path="$(destination_path "$name")"
     if [ "${FILE_EXISTED[$name]:-}" = "1" ]; then
@@ -320,8 +693,14 @@ rollback_transaction() {
       failed=1
     fi
   done
+  if verify_run_owned_temp_absence; then
+    RUN_TEMP_RESIDUE_VERIFIED=1
+  else
+    failed=1
+    RUN_TEMP_RESIDUE_VERIFIED=0
+  fi
   set -e
-  if [ "$failed" -eq 0 ]; then
+  if [ "$failed" -eq 0 ] && [ "$ROLLBACK_PERFORMED" -eq 1 ] && [ "$RUN_TEMP_RESIDUE_VERIFIED" -eq 1 ]; then
     ROLLBACK_VERIFIED=1
     return 0
   fi
@@ -329,37 +708,78 @@ rollback_transaction() {
   return 1
 }
 
+handle_agent99_signal() {
+  local signal_name="$1"
+  local signal_exit_code="$2"
+  if [ "$COMMIT_CRITICAL" -eq 1 ] || [ "$APPLY_COMPLETE" -eq 1 ]; then
+    if [ -z "$DEFERRED_SIGNAL" ]; then
+      DEFERRED_SIGNAL="$signal_name"
+      DEFERRED_SIGNAL_EXIT="$signal_exit_code"
+    fi
+    return 0
+  fi
+  exit "$signal_exit_code"
+}
+
+cleanup_postcommit_directory() {
+  local cleanup_kind="$1"
+  local cleanup_path="$2"
+  local fault=""
+  if [ "$FAULT_INJECTION_ENABLED" -eq 1 ]; then
+    fault="${HOST110_BACKUP_RUNTIME_TEST_CLEANUP_FAULT:-}"
+  fi
+  if [ "$fault" = "$cleanup_kind" ]; then
+    return 1
+  fi
+  rm -rf -- "$cleanup_path" || return 1
+  [ ! -e "$cleanup_path" ] && [ ! -L "$cleanup_path" ] || return 1
+  fsync_paths_and_parents "$cleanup_path" || return 1
+  [ ! -e "$cleanup_path" ] && [ ! -L "$cleanup_path" ]
+}
+
 cleanup() {
-  local status=$?
+  local exit_status=$?
   local rollback_status="rollback_unverified"
+  local failure_receipt_written=0
   trap - EXIT HUP INT TERM
   if [ "$APPLY_STARTED" -eq 1 ] && [ "$APPLY_COMPLETE" -ne 1 ]; then
     if rollback_transaction; then
       rollback_status="failed_rolled_back"
     fi
-    write_receipt "$rollback_status" "$ROLLBACK_VERIFIED" >/dev/null || true
+    if write_receipt "$rollback_status" "$ROLLBACK_ATTEMPTED" "$ROLLBACK_PERFORMED" \
+      "$ROLLBACK_VERIFIED" "$RUN_TEMP_RESIDUE_VERIFIED"; then
+      failure_receipt_written=1
+    fi
   fi
-  [ -z "$STAGE_DIR" ] || rm -rf -- "$STAGE_DIR"
-  if [ "$ROLLBACK_VERIFIED" -eq 1 ]; then
-    [ -z "$ROLLBACK_DIR" ] || rm -rf -- "$ROLLBACK_DIR"
+  if [ "$APPLY_COMPLETE" -ne 1 ] && [ -n "$STAGE_DIR" ]; then
+    rm -rf -- "$STAGE_DIR" || true
   fi
-  exit "$status"
+  if [ "$APPLY_COMPLETE" -ne 1 ] \
+    && [ "$ROLLBACK_VERIFIED" -eq 1 ] \
+    && [ "$failure_receipt_written" -eq 1 ]; then
+    if [ -n "$ROLLBACK_DIR" ]; then
+      rm -rf -- "$ROLLBACK_DIR" || true
+    fi
+  fi
+  exit "$exit_status"
 }
 
 validate_source || fail "source_validation_failed"
 
 if [ "$MODE" = "check" ]; then
-  printf '{"schemaVersion":"agent99_host110_backup_runtime_executor_v1","mode":"check","ok":true,"sourceRevision":"%s","sourceHead":"%s","fileCount":18,"backupScriptFileCount":17,"backupHealthExporterIncluded":true,"remoteWritePerformed":false}\n' "$SOURCE_REVISION" "$SOURCE_HEAD"
+  printf '{"schemaVersion":"agent99_host110_backup_runtime_executor_v1","mode":"check","ok":true,"sourceRevision":"%s","sourceHead":"%s","runId":"%s","fileCount":18,"backupScriptFileCount":17,"backupHealthExporterIncluded":true,"remoteWritePerformed":false}\n' "$SOURCE_REVISION" "$SOURCE_HEAD" "$RUN_ID"
   exit 0
 fi
 
 if [ "$MODE" = "verify" ]; then
   verify_destination || fail "destination_verification_failed"
-  printf '{"schemaVersion":"agent99_host110_backup_runtime_executor_v1","mode":"verify","ok":true,"sourceRevision":"%s","sourceHead":"%s","fileCount":18,"backupScriptFileCount":17,"backupHealthExporterIncluded":true,"remoteWritePerformed":false}\n' "$SOURCE_REVISION" "$SOURCE_HEAD"
+  printf '{"schemaVersion":"agent99_host110_backup_runtime_executor_v1","mode":"verify","ok":true,"sourceRevision":"%s","sourceHead":"%s","runId":"%s","fileCount":18,"backupScriptFileCount":17,"backupHealthExporterIncluded":true,"remoteWritePerformed":false}\n' "$SOURCE_REVISION" "$SOURCE_HEAD" "$RUN_ID"
   exit 0
 fi
 
-[ ! -e "$STATUS_ROOT/agent99-backup-runtime-deploy-${RUN_ID}.json" ] || fail "run_identity_receipt_exists"
+[ ! -e "$RECEIPT_PATH" ] && [ ! -L "$RECEIPT_PATH" ] || fail "run_identity_receipt_exists"
+[ ! -e "$TERMINAL_RECEIPT_PATH" ] && [ ! -L "$TERMINAL_RECEIPT_PATH" ] \
+  || fail "run_identity_terminal_receipt_exists"
 STAGE_DIR="$STAGE_ROOT/$RUN_ID"
 ROLLBACK_DIR="$ROLLBACK_ROOT/$RUN_ID"
 [ ! -e "$STAGE_DIR" ] || fail "run_identity_stage_exists"
@@ -380,8 +800,9 @@ fi
 
 install -d -m 700 "$STAGE_DIR" "$ROLLBACK_DIR"
 trap cleanup EXIT
-trap 'exit 130' INT
-trap 'exit 143' TERM HUP
+trap 'handle_agent99_signal INT 130' INT
+trap 'handle_agent99_signal HUP 129' HUP
+trap 'handle_agent99_signal TERM 143' TERM
 
 for name in "${PAYLOAD_FILES[@]}"; do
   install -m 700 "$SOURCE_STAGE/$name" "$STAGE_DIR/$name"
@@ -399,10 +820,17 @@ for name in "${PAYLOAD_FILES[@]}"; do
   dest_path="$(destination_path "$name")"
   destination_parent="$(dirname "$dest_path")"
   temporary="$destination_parent/.${name}.agent99-${RUN_ID}"
+  register_run_owned_temp "$temporary"
   install -m 755 "$STAGE_DIR/$name" "$temporary"
+  if [ "$FAULT_INJECTION_ENABLED" -eq 1 ] \
+    && [ "${HOST110_BACKUP_RUNTIME_TEST_APPLY_FAULT:-}" = "after_temp_install" ] \
+    && [ "$name" = "${PAYLOAD_FILES[0]}" ]; then
+    fail "fault_injected_after_temp_install"
+  fi
   mv -f -- "$temporary" "$dest_path"
 done
 
+fsync_destination_state || fail "post_apply_durability_failed"
 verify_destination || fail "post_apply_verification_failed"
 verifier_result="$(BACKUP_RUNTIME_DEPLOY_CONTEXT=1 python3 "$SOURCE_STAGE/verify-host110-backup-runtime.py" \
   --manifest "$SOURCE_STAGE/manifest.json" \
@@ -433,27 +861,118 @@ if not (
     raise SystemExit(1)
 PY
 
+verify_run_owned_temp_absence || fail "post_apply_temp_residue_detected"
+RUN_TEMP_RESIDUE_VERIFIED=1
+COMMIT_CRITICAL=1
+if ! write_receipt "payload_verified" 0 0 0 "$RUN_TEMP_RESIDUE_VERIFIED"; then
+  COMMIT_CRITICAL=0
+  fail "durable_receipt_failed"
+fi
+if [ "$FAULT_INJECTION_ENABLED" -eq 1 ] \
+  && [ -n "${HOST110_BACKUP_RUNTIME_TEST_COMMIT_SIGNAL:-}" ]; then
+  case "$HOST110_BACKUP_RUNTIME_TEST_COMMIT_SIGNAL" in
+    INT|HUP|TERM) kill -s "$HOST110_BACKUP_RUNTIME_TEST_COMMIT_SIGNAL" "$$" ;;
+  esac
+fi
 APPLY_COMPLETE=1
-receipt_path="$(write_receipt "verified" 0)"
-rm -rf -- "$STAGE_DIR" "$ROLLBACK_DIR"
-STAGE_DIR=""
-ROLLBACK_DIR=""
-trap - EXIT HUP INT TERM
-python3 - "$SOURCE_REVISION" "$SOURCE_HEAD" "$receipt_path" "$verifier_result" <<'PY'
+COMMIT_CRITICAL=0
+stage_cleanup_verified=0
+rollback_prestate_cleanup_verified=0
+if cleanup_postcommit_directory "stage" "$STAGE_DIR"; then
+  stage_cleanup_verified=1
+fi
+if cleanup_postcommit_directory "rollback_prestate" "$ROLLBACK_DIR"; then
+  rollback_prestate_cleanup_verified=1
+fi
+terminal_status="verified"
+terminal_exit_code=0
+# Cleanup has completed. Freeze terminal signal state before the immutable
+# terminal writer so its receipt, stdout, and exit status cannot diverge.
+trap '' HUP INT TERM
+if [ "$stage_cleanup_verified" -ne 1 ] || [ "$rollback_prestate_cleanup_verified" -ne 1 ]; then
+  terminal_status="cleanup_pending"
+  terminal_exit_code=75
+elif [ -n "$DEFERRED_SIGNAL" ]; then
+  terminal_status="committed_signal_deferred"
+  terminal_exit_code="$DEFERRED_SIGNAL_EXIT"
+fi
+if ! write_terminal_receipt "$terminal_status" "$stage_cleanup_verified" \
+  "$rollback_prestate_cleanup_verified" "$DEFERRED_SIGNAL" "$terminal_exit_code"; then
+  trap - EXIT
+  python3 - "$SOURCE_REVISION" "$SOURCE_HEAD" "$RUN_ID" "$RECEIPT_PATH" \
+    "$TERMINAL_RECEIPT_PATH" "$stage_cleanup_verified" \
+    "$rollback_prestate_cleanup_verified" "$DEFERRED_SIGNAL" <<'PY'
 import json
 import sys
 
 print(json.dumps({
     "schemaVersion": "agent99_host110_backup_runtime_executor_v1",
     "mode": "apply",
-    "ok": True,
+    "status": "terminal_receipt_failed",
+    "ok": False,
     "sourceRevision": sys.argv[1],
     "sourceHead": sys.argv[2],
+    "runId": sys.argv[3],
     "fileCount": 18,
     "backupScriptFileCount": 17,
     "backupHealthExporterIncluded": True,
+    "payloadCommitted": True,
+    "rollbackAttempted": False,
     "rollbackPerformed": False,
-    "receipt": sys.argv[3],
-    "verifier": json.loads(sys.argv[4]),
+    "rollbackVerified": False,
+    "zeroResidueVerified": True,
+    "zeroResidueScope": "run_owned_destination_temps",
+    "stageCleanupVerified": sys.argv[6] == "1",
+    "rollbackPrestateCleanupVerified": sys.argv[7] == "1",
+    "receipt": sys.argv[4],
+    "terminalReceipt": sys.argv[5],
+    "terminalReceiptPublished": False,
+    "terminalExitCode": 76,
+    "deferredSignal": sys.argv[8] or None,
+    "independentVerifierVerified": True,
+    "verifier": None,
 }, ensure_ascii=True, sort_keys=True))
 PY
+  printf 'HOST110_BACKUP_RUNTIME_OK=0\nERROR=terminal_receipt_failed\n' >&2
+  exit 76
+fi
+if [ "$stage_cleanup_verified" -eq 1 ]; then STAGE_DIR=""; fi
+if [ "$rollback_prestate_cleanup_verified" -eq 1 ]; then ROLLBACK_DIR=""; fi
+trap - EXIT
+python3 - "$SOURCE_REVISION" "$SOURCE_HEAD" "$RECEIPT_PATH" "$TERMINAL_RECEIPT_PATH" \
+  "$verifier_result" "$stage_cleanup_verified" "$rollback_prestate_cleanup_verified" \
+  "$terminal_status" "$terminal_exit_code" "$DEFERRED_SIGNAL" "$RUN_ID" <<'PY'
+import json
+import sys
+
+status = sys.argv[8]
+verifier = json.loads(sys.argv[5])
+print(json.dumps({
+    "schemaVersion": "agent99_host110_backup_runtime_executor_v1",
+    "mode": "apply",
+    "status": status,
+    "ok": status == "verified",
+    "sourceRevision": sys.argv[1],
+    "sourceHead": sys.argv[2],
+    "runId": sys.argv[11],
+    "fileCount": 18,
+    "backupScriptFileCount": 17,
+    "backupHealthExporterIncluded": True,
+    "payloadCommitted": True,
+    "rollbackAttempted": False,
+    "rollbackPerformed": False,
+    "rollbackVerified": False,
+    "zeroResidueVerified": True,
+    "zeroResidueScope": "run_owned_destination_temps",
+    "stageCleanupVerified": sys.argv[6] == "1",
+    "rollbackPrestateCleanupVerified": sys.argv[7] == "1",
+    "receipt": sys.argv[3],
+    "terminalReceipt": sys.argv[4],
+    "terminalReceiptPublished": True,
+    "terminalExitCode": int(sys.argv[9]),
+    "deferredSignal": sys.argv[10] or None,
+    "independentVerifierVerified": True,
+    "verifier": verifier if status == "verified" else None,
+}, ensure_ascii=True, sort_keys=True))
+PY
+exit "$terminal_exit_code"

scripts/backup/verify-host188-products-archive.py

@@ -27,11 +27,46 @@ RUNTIME_LOCK = Path("/tmp/agent99-host110-backup-runtime.lock")
 
 
 def acquire_runtime_lock():
-    if Path(__file__).resolve().parent != Path("/backup/scripts") or os.environ.get("BACKUP_RUNTIME_SHARED_LOCK_HELD") == "1":
+    if Path(__file__).resolve().parent != Path("/backup/scripts"):
         return None
     if RUNTIME_LOCK.is_symlink():
         raise RuntimeError("backup_runtime_gate_unsafe")
-    handle = RUNTIME_LOCK.open("a+")
+    inherited_fd_path: Path | None = None
+    proc_fd_root = Path(f"/proc/{os.getpid()}/fd")
+    if proc_fd_root.is_dir():
+        candidate = proc_fd_root / "197"
+        if candidate.exists() or candidate.is_symlink():
+            inherited_fd_path = candidate
+    else:
+        candidate = Path("/dev/fd/197")
+        if candidate.exists() or candidate.is_symlink():
+            inherited_fd_path = candidate
+
+    if inherited_fd_path is None:
+        handle = RUNTIME_LOCK.open("a+")
+    else:
+        if not RUNTIME_LOCK.is_file():
+            raise RuntimeError("backup_runtime_gate_unavailable")
+        if proc_fd_root.is_dir():
+            try:
+                inherited_target = inherited_fd_path.resolve(strict=True)
+                expected_target = RUNTIME_LOCK.resolve(strict=True)
+            except OSError as exc:
+                raise RuntimeError("backup_runtime_inherited_fd_unresolved") from exc
+        else:
+            try:
+                raw_target = fcntl.fcntl(197, getattr(fcntl, "F_GETPATH", 50), b"\0" * 1024)
+                inherited_target = Path(os.fsdecode(raw_target.split(b"\0", 1)[0])).resolve(strict=True)
+                expected_target = RUNTIME_LOCK.resolve(strict=True)
+            except OSError as exc:
+                raise RuntimeError("backup_runtime_inherited_fd_unresolved") from exc
+        if inherited_target != expected_target:
+            raise RuntimeError("backup_runtime_inherited_fd_mismatch")
+        try:
+            handle = os.fdopen(os.dup(197), "a+")
+        except OSError as exc:
+            raise RuntimeError("backup_runtime_inherited_fd_unavailable") from exc
+
     if RUNTIME_LOCK.stat().st_uid != os.getuid():
         handle.close()
         raise RuntimeError("backup_runtime_gate_owner_invalid")

scripts/reboot-recovery/tests/agent99-host110-broker-contract-replay.ps1

@@ -0,0 +1,409 @@
+$ErrorActionPreference = "Stop"
+
+function Write-ReplayTrace {
+  param([string]$Step)
+  if ($ReplayTrace) { Write-Output "REPLAY_STEP=$Step" }
+}
+
+if (-not $BrokerGzipBase64) { throw "broker_payload_missing" }
+Write-ReplayTrace "decode_source"
+$compressed = [Convert]::FromBase64String([string]$BrokerGzipBase64)
+$inputStream = New-Object IO.MemoryStream(,$compressed)
+$gzip = New-Object IO.Compression.GzipStream(
+  $inputStream,
+  [IO.Compression.CompressionMode]::Decompress
+)
+$reader = New-Object IO.StreamReader($gzip, [Text.Encoding]::UTF8)
+try {
+  $brokerSource = $reader.ReadToEnd()
+} finally {
+  $reader.Dispose()
+  $gzip.Dispose()
+  $inputStream.Dispose()
+}
+
+$tokens = $null
+$parseErrors = $null
+$ast = [Management.Automation.Language.Parser]::ParseInput(
+  $brokerSource,
+  [ref]$tokens,
+  [ref]$parseErrors
+)
+if ($parseErrors.Count -ne 0) { throw "broker_parse_failed" }
+Write-ReplayTrace "define_functions"
+
+$functionNames = @(
+  "Test-Agent99JsonField",
+  "Assert-Agent99JsonFields",
+  "Assert-Agent99ExactJsonFields",
+  "Convert-Agent99ExecutorDocument",
+  "Assert-Agent99ApplyResultFields",
+  "Assert-Agent99VerifierFields",
+  "Get-Agent99ExecutorResult",
+  "Get-Agent99CommittedFailureResult",
+  "Assert-Agent99VerifierEvidence",
+  "Assert-Agent99PreflightEvidence",
+  "Get-Agent99TransportReceiptReadback",
+  "New-Agent99TransportLossReconciliation",
+  "Assert-Agent99ExecutorEvidence",
+  "Assert-Agent99ReconciliationEvidence",
+  "Assert-Agent99ExistingBrokerEvidence"
+)
+foreach ($functionName in $functionNames) {
+  $node = $ast.Find(
+    {
+      param($candidate)
+      $candidate -is [Management.Automation.Language.FunctionDefinitionAst] -and
+        $candidate.Name -eq $functionName
+    },
+    $true
+  )
+  if ($null -eq $node) { throw "broker_function_missing_$functionName" }
+  Invoke-Expression $node.Extent.Text
+}
+
+$SourceRevision = "a" * 40
+$RunId = "windows99-contract-replay"
+$Mode = "Apply"
+$TargetHost = "192.168.0.110"
+$ExpectedFileCount = 18
+$sourceHead = "b" * 40
+$VerifierSha256 = "c" * 64
+$payloadReceipt = "/backup/status/agent99-backup-runtime-deploy-$RunId.json"
+$terminalReceipt = "/backup/status/agent99-backup-runtime-terminal-$RunId.json"
+
+function Copy-ReplayDocument {
+  param([object]$Document)
+  return ($Document | ConvertTo-Json -Compress -Depth 12 | ConvertFrom-Json)
+}
+
+function New-ReplayTransport {
+  param([object]$Document, [int]$ExitCode)
+  return [pscustomobject]@{
+    ok = [bool]($ExitCode -eq 0)
+    exitCode = $ExitCode
+    reason = if ($ExitCode -eq 0) { "completed" } else { "process_failed" }
+    stdout = $Document | ConvertTo-Json -Compress -Depth 12
+    stderrPresent = $false
+  }
+}
+
+function Assert-Rejected {
+  param([scriptblock]$Operation, [string]$Name)
+  $accepted = $false
+  try {
+    & $Operation | Out-Null
+    $accepted = $true
+  } catch {}
+  if ($accepted) { throw "contract_mutation_accepted_$Name" }
+}
+
+$verifier = [pscustomobject]@{
+  schemaVersion = "agent99_host110_backup_runtime_verifier_v1"
+  ok = $true
+  sourceRevision = $SourceRevision
+  runId = $RunId
+  fileCount = 18
+  backupScriptFileCount = 17
+  backupHealthExporterIncluded = $true
+  destination = "/backup/scripts"
+  exporterDestination = "/home/wooo/scripts/backup-health-textfile-exporter.py"
+  remoteWritePerformed = $false
+  secretValuesRead = $false
+  selfIdentityVerified = $true
+  verifierSha256 = $VerifierSha256
+}
+$success = [pscustomobject]@{
+  schemaVersion = "agent99_host110_backup_runtime_executor_v1"
+  mode = "apply"
+  status = "verified"
+  ok = $true
+  sourceRevision = $SourceRevision
+  sourceHead = $sourceHead
+  runId = $RunId
+  fileCount = 18
+  backupScriptFileCount = 17
+  backupHealthExporterIncluded = $true
+  payloadCommitted = $true
+  rollbackAttempted = $false
+  rollbackPerformed = $false
+  rollbackVerified = $false
+  zeroResidueVerified = $true
+  zeroResidueScope = "run_owned_destination_temps"
+  stageCleanupVerified = $true
+  rollbackPrestateCleanupVerified = $true
+  receipt = $payloadReceipt
+  terminalReceipt = $terminalReceipt
+  terminalReceiptPublished = $true
+  terminalExitCode = 0
+  deferredSignal = $null
+  independentVerifierVerified = $true
+  verifier = $verifier
+}
+
+Write-ReplayTrace "accept_success"
+Get-Agent99ExecutorResult (New-ReplayTransport $success 0) "Apply" $VerifierSha256 | Out-Null
+$topLevelRequired = @(
+  "schemaVersion", "mode", "status", "ok", "sourceRevision", "sourceHead",
+  "runId", "fileCount", "backupScriptFileCount", "backupHealthExporterIncluded",
+  "payloadCommitted", "rollbackAttempted", "rollbackPerformed", "rollbackVerified",
+  "zeroResidueVerified", "zeroResidueScope", "stageCleanupVerified",
+  "rollbackPrestateCleanupVerified", "receipt", "terminalReceipt", "terminalExitCode",
+  "terminalReceiptPublished", "deferredSignal", "independentVerifierVerified", "verifier"
+)
+$verifierRequired = @(
+  "schemaVersion", "ok", "sourceRevision", "runId", "fileCount",
+  "backupScriptFileCount", "backupHealthExporterIncluded", "remoteWritePerformed",
+  "secretValuesRead", "selfIdentityVerified", "destination", "exporterDestination",
+  "verifierSha256"
+)
+$missingFieldRejections = 0
+Write-ReplayTrace "reject_missing_top"
+foreach ($field in $topLevelRequired) {
+  $mutated = Copy-ReplayDocument $success
+  $mutated.PSObject.Properties.Remove($field)
+  Assert-Rejected { Get-Agent99ExecutorResult (New-ReplayTransport $mutated 0) "Apply" $VerifierSha256 } "missing_$field"
+  $missingFieldRejections++
+}
+Write-ReplayTrace "reject_missing_verifier"
+foreach ($field in $verifierRequired) {
+  $mutated = Copy-ReplayDocument $success
+  $mutated.verifier.PSObject.Properties.Remove($field)
+  Assert-Rejected { Get-Agent99ExecutorResult (New-ReplayTransport $mutated 0) "Apply" $VerifierSha256 } "missing_verifier_$field"
+  $missingFieldRejections++
+}
+
+$typeMutations = @(
+  @{ field = "rollbackAttempted"; value = "false" },
+  @{ field = "rollbackPerformed"; value = "false" },
+  @{ field = "rollbackVerified"; value = "false" },
+  @{ field = "terminalExitCode"; value = "0" },
+  @{ field = "deferredSignal"; value = 0 }
+)
+$typeRejections = 0
+Write-ReplayTrace "reject_types"
+foreach ($mutation in $typeMutations) {
+  $mutated = Copy-ReplayDocument $success
+  $mutated.($mutation.field) = $mutation.value
+  Assert-Rejected { Get-Agent99ExecutorResult (New-ReplayTransport $mutated 0) "Apply" $VerifierSha256 } "type_$($mutation.field)"
+  $typeRejections++
+}
+$mutated = Copy-ReplayDocument $success
+$mutated.verifier.remoteWritePerformed = "false"
+Assert-Rejected { Get-Agent99ExecutorResult (New-ReplayTransport $mutated 0) "Apply" $VerifierSha256 } "type_verifier_remoteWritePerformed"
+$typeRejections++
+
+$cleanupPending = Copy-ReplayDocument $success
+$cleanupPending.ok = $false
+$cleanupPending.status = "cleanup_pending"
+$cleanupPending.stageCleanupVerified = $false
+$cleanupPending.terminalExitCode = 75
+$cleanupPending.verifier = $null
+Write-ReplayTrace "accept_cleanup_pending"
+Get-Agent99CommittedFailureResult (New-ReplayTransport $cleanupPending 75) | Out-Null
+
+$signalDeferred = Copy-ReplayDocument $success
+$signalDeferred.ok = $false
+$signalDeferred.status = "committed_signal_deferred"
+$signalDeferred.terminalExitCode = 143
+$signalDeferred.deferredSignal = "TERM"
+$signalDeferred.verifier = $null
+Write-ReplayTrace "accept_signal_deferred"
+Get-Agent99CommittedFailureResult (New-ReplayTransport $signalDeferred 143) | Out-Null
+
+$terminalReceiptFailed = Copy-ReplayDocument $success
+$terminalReceiptFailed.ok = $false
+$terminalReceiptFailed.status = "terminal_receipt_failed"
+$terminalReceiptFailed.terminalReceiptPublished = $false
+$terminalReceiptFailed.terminalExitCode = 76
+$terminalReceiptFailed.verifier = $null
+Write-ReplayTrace "accept_terminal_receipt_failed"
+Get-Agent99CommittedFailureResult (New-ReplayTransport $terminalReceiptFailed 76) | Out-Null
+
+$EvidencePath = "C:\Wooo\Agent99\evidence\host110-backup-runtime\agent99-host110-backup-runtime-$RunId.json"
+$preflight = [pscustomobject]@{
+  schemaVersion = "agent99_host110_backup_runtime_preflight_v1"
+  ok = $true
+  sourceRevision = $SourceRevision
+  sourceHead = $sourceHead
+  fileCount = 18
+  backupScriptFileCount = 17
+  backupHealthExporterIncluded = $true
+  remoteWritePerformed = $false
+}
+$brokerSuccess = [pscustomobject]@{
+  schemaVersion = "agent99_host110_backup_runtime_broker_receipt_v3"
+  ok = $true
+  status = "verified"
+  mode = "Apply"
+  sourceRevision = $SourceRevision
+  sourceHead = $sourceHead
+  runId = $RunId
+  targetHost = $TargetHost
+  sourceTransport = "windows99_gitea_exact_revision_manifest"
+  executor = "host110_backup_runtime_executor"
+  verifier = "independent_host110_backup_runtime_python_readback"
+  decisionProvider = "deterministic_only"
+  criticProvider = "deterministic_only"
+  agentAction = "controlled_apply"
+  check = $preflight
+  apply = $success
+  verify = $verifier
+  cleanupVerified = $true
+  errorCode = ""
+  elapsedSeconds = 1.25
+  evidence = $EvidencePath
+  secretValuesRead = $false
+  rawSessionStored = $false
+}
+Write-ReplayTrace "accept_existing_success"
+Assert-Agent99ExistingBrokerEvidence $brokerSuccess $EvidencePath
+
+$brokerRequired = @(
+  "schemaVersion", "ok", "status", "mode", "sourceRevision", "sourceHead",
+  "runId", "targetHost", "sourceTransport", "executor", "verifier",
+  "decisionProvider", "criticProvider", "agentAction", "check", "apply",
+  "verify", "cleanupVerified", "errorCode", "elapsedSeconds", "evidence",
+  "secretValuesRead", "rawSessionStored"
+)
+$existingEvidenceRejections = 0
+Write-ReplayTrace "reject_existing_missing"
+foreach ($field in $brokerRequired) {
+  $mutated = Copy-ReplayDocument $brokerSuccess
+  $mutated.PSObject.Properties.Remove($field)
+  Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $mutated $EvidencePath } "existing_missing_$field"
+  $existingEvidenceRejections++
+}
+$existingMutations = @(
+  @{ name = "ok_string_false"; field = "ok"; value = "false" },
+  @{ name = "wrong_mode"; field = "mode"; value = "Verify" },
+  @{ name = "wrong_run_id"; field = "runId"; value = "other-run" },
+  @{ name = "wrong_status"; field = "status"; value = "readback_ok" },
+  @{ name = "wrong_cleanup"; field = "cleanupVerified"; value = $false },
+  @{ name = "cleanup_string"; field = "cleanupVerified"; value = "true" },
+  @{ name = "elapsed_string"; field = "elapsedSeconds"; value = "1.25" }
+)
+Write-ReplayTrace "reject_existing_conflicts"
+foreach ($mutation in $existingMutations) {
+  $mutated = Copy-ReplayDocument $brokerSuccess
+  $mutated.($mutation.field) = $mutation.value
+  Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $mutated $EvidencePath } "existing_$($mutation.name)"
+  $existingEvidenceRejections++
+}
+$mutated = Copy-ReplayDocument $brokerSuccess
+$mutated.apply.runId = "other-run"
+Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $mutated $EvidencePath } "existing_apply_run_conflict"
+$existingEvidenceRejections++
+$mutated = Copy-ReplayDocument $brokerSuccess
+$mutated.verify.PSObject.Properties.Remove("selfIdentityVerified")
+Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $mutated $EvidencePath } "existing_verify_nested_missing"
+$existingEvidenceRejections++
+$mutated = Copy-ReplayDocument $brokerSuccess
+$mutated | Add-Member -NotePropertyName unexpected -NotePropertyValue $true
+Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $mutated $EvidencePath } "existing_extra_top"
+$existingEvidenceRejections++
+$mutated = Copy-ReplayDocument $brokerSuccess
+$mutated.apply | Add-Member -NotePropertyName unexpected -NotePropertyValue $true
+Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $mutated $EvidencePath } "existing_extra_apply"
+$existingEvidenceRejections++
+
+$brokerFailure = Copy-ReplayDocument $brokerSuccess
+$brokerFailure.ok = $false
+$brokerFailure.status = "failed"
+$brokerFailure.cleanupVerified = $false
+$brokerFailure.errorCode = "host110_apply_cleanup_pending"
+$brokerFailure.apply = $cleanupPending
+$brokerFailure.verify = $null
+Write-ReplayTrace "accept_existing_failure"
+Assert-Agent99ExistingBrokerEvidence $brokerFailure $EvidencePath
+$failureWithoutPreflight = Copy-ReplayDocument $brokerFailure
+$failureWithoutPreflight.check = $null
+Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $failureWithoutPreflight $EvidencePath } "failure_preflight_missing"
+$existingEvidenceRejections++
+$failureWithImpossibleVerifier = Copy-ReplayDocument $brokerFailure
+$failureWithImpossibleVerifier.verify = $verifier
+Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $failureWithImpossibleVerifier $EvidencePath } "failure_verifier_conflict"
+$existingEvidenceRejections++
+$postcommitCleanupFailure = Copy-ReplayDocument $brokerSuccess
+$postcommitCleanupFailure.ok = $false
+$postcommitCleanupFailure.status = "failed"
+$postcommitCleanupFailure.cleanupVerified = $false
+$postcommitCleanupFailure.errorCode = "remote_source_stage_cleanup_failed"
+Assert-Agent99ExistingBrokerEvidence $postcommitCleanupFailure $EvidencePath
+$malformedFailure = Copy-ReplayDocument $brokerFailure
+$malformedFailure.ok = "false"
+Assert-Rejected { Assert-Agent99ExistingBrokerEvidence $malformedFailure $EvidencePath } "malformed_failure_not_upgraded"
+$existingEvidenceRejections++
+
+$sourcePackage = [pscustomobject]@{ sourceHead = $sourceHead }
+$transportLoss = [pscustomobject]@{ reason = "transport_timeout"; exitCode = -2 }
+$receiptReadback = [pscustomobject]@{
+  schemaVersion = "agent99_host110_backup_transport_receipt_readback_v1"
+  ok = $true
+  sourceRevision = $SourceRevision
+  sourceHead = $sourceHead
+  runId = $RunId
+  payloadReceipt = $payloadReceipt
+  payloadState = "valid"
+  terminalReceipt = $terminalReceipt
+  terminalState = "missing"
+  terminalStatus = ""
+  terminalCleanupVerified = $false
+  terminalExitCode = -1
+  remoteWritePerformed = $false
+  secretValuesRead = $false
+}
+Write-ReplayTrace "reconcile_terminal_missing"
+$terminalMissing = New-Agent99TransportLossReconciliation $transportLoss $sourcePackage $receiptReadback $verifier
+if (
+  $terminalMissing.status -ne "committed_verified_terminal_missing" -or
+  -not $terminalMissing.payloadCommitted -or
+  -not $terminalMissing.destinationVerified -or
+  $terminalMissing.retryApplyAllowed
+) { throw "transport_terminal_missing_reconciliation_failed" }
+Assert-Agent99ReconciliationEvidence $terminalMissing $sourceHead
+
+$terminalPresentReadback = Copy-ReplayDocument $receiptReadback
+$terminalPresentReadback.terminalState = "valid"
+$terminalPresentReadback.terminalStatus = "verified"
+$terminalPresentReadback.terminalCleanupVerified = $true
+$terminalPresentReadback.terminalExitCode = 0
+$transportRecovered = New-Agent99TransportLossReconciliation $transportLoss $sourcePackage $terminalPresentReadback $verifier
+if ($transportRecovered.status -ne "committed_verified_transport_lost" -or $transportRecovered.retryApplyAllowed) {
+  throw "transport_verified_reconciliation_failed"
+}
+Assert-Agent99ReconciliationEvidence $transportRecovered $sourceHead
+$conflictingTransport = Copy-ReplayDocument $transportRecovered
+$conflictingTransport.terminalStatus = "cleanup_pending"
+Assert-Rejected { Assert-Agent99ReconciliationEvidence $conflictingTransport $sourceHead } "transport_terminal_status_conflict"
+$existingEvidenceRejections++
+
+$committedUnknown = New-Agent99TransportLossReconciliation `
+  $transportLoss $sourcePackage $null $null "receipt_readback_unavailable" "verifier_unavailable"
+if (
+  $committedUnknown.status -ne "committed_unknown" -or
+  $committedUnknown.payloadCommitted -or
+  $committedUnknown.destinationVerified -or
+  $committedUnknown.retryApplyAllowed
+) { throw "transport_unknown_reconciliation_failed" }
+Assert-Agent99ReconciliationEvidence $committedUnknown $sourceHead
+
+Write-ReplayTrace "complete"
+[pscustomobject]@{
+  schemaVersion = "agent99_host110_broker_contract_replay_v1"
+  ok = $true
+  parser = "WindowsPowerShell"
+  successAccepted = $true
+  cleanupPendingPreserved = $true
+  committedSignalPreserved = $true
+  terminalReceiptFailurePreserved = $true
+  existingSuccessAccepted = $true
+  existingFailurePreserved = $true
+  existingEvidenceRejections = $existingEvidenceRejections
+  terminalMissingReconciled = $true
+  committedUnknownPreserved = $true
+  missingFieldRejections = $missingFieldRejections
+  typeRejections = $typeRejections
+  remoteWritePerformed = $false
+  secretValuesRead = $false
+} | ConvertTo-Json -Compress