@@ -186,7 +186,7 @@ One of the largest consumers of the flag;
 | 47b | The inbound-mail ingest seam: `ingest` admits the system context ALONE, and `rematch` admits it without the organization, owner or `manage_mailboxes` check | service-mailbox | Get: a mail source hands a mailbox its messages, and server code re-matches any mailbox. Lose: nothing a user held — every other caller of `ingest` is refused (`PERMISSION_DENIED`), because an ingested message is shown on every record its correspondents' addresses match and a user who could hand the seam a message could write one in a correspondent's name; every other caller of `rematch` must be in the mailbox's organization and own the mailbox or hold `manage_mailboxes` | `ingest`, `authorizeRematch` |
 | 47c | The inbound-mail IMAP sync: `syncMailbox` and `syncAll` admit the system context ALONE | service-mailbox | Get: the sync job reads every mailbox row (its organization, address and IMAP cursor), writes the cursor back, and hands each fetched message to `ingest` under the system context. Lose: nothing a user held — every other caller is refused (`PERMISSION_DENIED`), because a sync stores a mailbox's mail and moves its cursor | `syncMailbox`, `syncAll` |
 | 47d | The print service REFUSES the system context: `printRecordToFile` admits a human user acting for themselves alone | service-print | Get: nothing — a system caller is refused (`PERMISSION_DENIED`) before any page is read, session minted or browser started. Lose: nothing a user held — the PDF is rendered as the requesting user and never as the system, so a record is archived only by someone who could read it | `refuseUnlessHumanCaller` |
-| 47e | The caller-scoped attach verbs REFUSE the system context: `attachFileAs` and `assertMayAttach` admit a signed-in user alone | service-storage | Get: nothing — a system caller is refused (`PERMISSION_DENIED`); the system attaches through `attachFile`, whose rows name no user. Lose: nothing a user held — the caller-scoped verbs insert the attachment under the caller's context so every insert gate judges that user and both rows name them | `requireUserContext` |
+| 47e | The caller-scoped attach verbs REFUSE the system context: `attachFileAs` and `assertMayAttach` admit a signed-in user alone, and so do the caller-scoped record-file verbs the MCP `read_file` and `create_upload_link` tools call (`listRecordFilesAs`, `readRecordFileAs`, `createUploadLinkAs`) | service-storage | Get: nothing — a system caller is refused (`PERMISSION_DENIED`); the system attaches through `attachFile`, whose rows name no user. Lose: nothing a user held — the caller-scoped verbs insert the attachment under the caller's context so every insert gate judges that user and both rows name them, and the record-file verbs read the record and judge the file as that user, and bind an upload link to them | `packages/services/service-storage/src/file-attachment-service.ts#requireUserContext`, `packages/services/service-storage/src/record-file-access.ts#requireUserContext` |
 | 47f | The file-reference claim path asks no read verdict of a system write: a record write claims or copies a referenced file only as its caller may read it (the download door's verdict), and a system write carries no caller to ask | service-storage | Get: a system write claims or copies any file the organization-scoped lookup reaches, as before #25692; a deliberate server-side copy between records runs this way. Lose: nothing a user held — a user write is judged by the download door's verdict, and a context-less programmatic write is not asked either | `referencingCallerOf` |
 | 47g | The `sys_file` storage-owned columns guard returns early on create: a system insert keeps the `key`, `mime_type`, `size`, `status` and `etag` it writes | service-storage | Get: the storage service's own inserts (the upload doors, the field-file copy and backfill) write those five columns. Lose: nothing a user held — a non-system create has them dropped and starts `pending`, and on update the same columns are `readonly`, so the UPDATE `readonly` strip keeps them for every non-system caller | `installSysFileStorageOwnedColumnsGuard` |
 
@@ -674,6 +674,7 @@ and CI refuses one that differs from what the tree produces.
 | `packages/services/service-storage/src/attachment-access-hooks.ts#installAttachmentReadVisibility` | 1 | 44 |
 | `packages/services/service-storage/src/file-attachment-service.ts#requireUserContext` | 1 | 47e |
 | `packages/services/service-storage/src/file-reference-lifecycle.ts#referencingCallerOf` | 1 | 47f |
+| `packages/services/service-storage/src/record-file-access.ts#requireUserContext` | 1 | 47e |
 | `packages/services/service-storage/src/sys-file-storage-owned-columns.ts#installSysFileStorageOwnedColumnsGuard` | 1 | 47g |
 
 {/* END GENERATED: system-context-census */}
 
@@ -93,7 +93,7 @@ what moved this page's population from 225 to 227; nothing about the two sites
 changed, only whether this instrument could see them.
 
 **The expensive failure direction is a keyword.** Sites whose receiver the author
-typed `any` have no type to read, and there are 62 of them — just over a fifth
+typed `any` have no type to read, and there are 63 of them — just over a fifth
 of the population, concentrated in exactly the seed and bootstrap paths this
 control exists for. Scoring an unreadable receiver as "not an engine" would have
 dropped every one of them silently, with a clean exit and a smaller number that
@@ -132,7 +132,7 @@ are reported as `undecidable` rather than assumed either way.
 
 The same holds twice over for the context. An options argument spelled as a
 literal can be read; one spelled `options`, `{ ...opts }`, or handed through a
-forwarding shim cannot, and **55 of the 261 sites are spelled that way**. A
+forwarding shim cannot, and **56 of the 263 sites are spelled that way**. A
 context resolved from an inline literal or a local `const` can be tested for
 `isSystem`; one arriving from a helper call cannot.
 
@@ -160,8 +160,8 @@ now **0**: nothing on this surface threads a context that provably lacks the fla
 
 **"No tenant context" counted sites it had not read.** An options argument the
 walker could not parse was folded into the same bucket as one it had read and
-found empty. That published **63 sites "carrying no tenant context at all"**
-when 8 said so and 55 were simply unread — an over-claim in the *alarming*
+found empty. That published **64 sites "carrying no tenant context at all"**
+when 8 said so and 56 were simply unread — an over-claim in the *alarming*
 direction, on the very figure this page tells other cards to cite. `carries` is
 now three-valued, and an unreadable argument can never contribute to the
 provable count.
@@ -197,10 +197,10 @@ reproduce them. Where it disagrees, it disagrees on the page:
 
 | carried figure | where it survives | this census |
 | :--- | :--- | ---: |
-| 175 write call sites | quoted in the merged changeset | **261** |
-| 24 carrying no tenant context | quoted in the merged changeset | **2** provable and tenancy-enabled; **29** more whose options argument is unreadable |
-| 127 of 175 statically decidable, 48 runtime-parameter-name sites | restated on the `isSystem`-scoping card | **184 of 261** decidable, **77** undecidable |
-| 135 (77%) silenced by the `isSystem` guard before the posture gate | the lost issue body — **no surviving corroboration** | **not reproduced**: 144 decidably elevated, 0 decidably not, 109 undecidable |
+| 175 write call sites | quoted in the merged changeset | **263** |
+| 24 carrying no tenant context | quoted in the merged changeset | **2** provable and tenancy-enabled; **30** more whose options argument is unreadable |
+| 127 of 175 statically decidable, 48 runtime-parameter-name sites | restated on the `isSystem`-scoping card | **185 of 263** decidable, **78** undecidable |
+| 135 (77%) silenced by the `isSystem` guard before the posture gate | the lost issue body — **no surviving corroboration** | **not reproduced**: 144 decidably elevated, 0 decidably not, 111 undecidable |
 | 141 and 132, two independent re-derivations | the card that filed this work | — |
 
 **The differences are not reconciled, and deliberately so.** The old census's
@@ -210,21 +210,21 @@ be stated is what this instrument counts, which is written above and re-runnable
 at any commit.
 
 Two structural facts do plausibly widen this reading against any hand or regex
-one, and both are counted in the generated tables below: the 62 sites reached
+one, and both are counted in the generated tables below: the 63 sites reached
 through an erased (`any`) receiver, and the 68 that name their object through a
 `const` rather than inline. An instrument that read either the way a person does
 would report a smaller number and would not say so.
 
 The fourth row is the one worth flagging to anyone citing it. **The 135 / 77%
 figure has no surviving corroboration anywhere in the tree.** This census reads
-144 of 261 (55%) as decidably elevated, with 109 more whose elevation is a
+144 of 263 (55%) as decidably elevated, with 111 more whose elevation is a
 run-time fact — so the claim is neither confirmed nor refuted, and the honest
 answer is that a static reading cannot settle it.
 
-⇒ **Cite `2 / 261`, and say what it is**: the sites whose options argument was
+⇒ **Cite `2 / 263`, and say what it is**: the sites whose options argument was
 READ and holds no tenant context, against a decidably tenancy-enabled object.
 That is the control's provable yield surface. ⛔ Do not cite it as "the sites
-without tenant context" — **29 further sites** have an options argument this
+without tenant context" — **30 further sites** have an options argument this
 cannot read, and they are neither in nor out.
 
 {/* BEGIN GENERATED: tenant-audit-census (scripts/tenant-audit-census.mjs) — DO NOT EDIT */}
@@ -233,31 +233,31 @@ cannot read, and they are neither in nor out.
 
 | what | count |
 | :--- | ---: |
-| write call sites on the application surface | **261** |
-| …whose object name is statically decidable | 184 |
-| …whose object name is chosen at run time | 77 |
-| …against an object with tenancy ENABLED | 178 |
+| write call sites on the application surface | **263** |
+| …whose object name is statically decidable | 185 |
+| …whose object name is chosen at run time | 78 |
+| …against an object with tenancy ENABLED | 179 |
 | …against an object that declares tenancy off | 6 |
-| threading a tenant context | 198 |
+| threading a tenant context | 199 |
 | PROVABLY carrying none (options read, no context key) | **8** |
 | …of those, against a decidably tenancy-enabled object | **2** |
-| options argument UNREADABLE — may or may not carry one | 55 |
-| …of those, against a decidably tenancy-enabled object | 29 |
+| options argument UNREADABLE — may or may not carry one | 56 |
+| …of those, against a decidably tenancy-enabled object | 30 |
 | threading a decidably ELEVATED (`isSystem`) context | 144 |
 | threading a context that is decidably NOT elevated | 0 |
-| threading a context whose elevation is a run-time fact | 109 |
+| threading a context whose elevation is a run-time fact | 111 |
 
 | how the instrument reached the site | count |
 | :--- | ---: |
-| receiver carried a readable engine type | 199 |
-| receiver erased, placed by the object NAME | 52 |
+| receiver carried a readable engine type | 200 |
+| receiver erased, placed by the object NAME | 53 |
 | receiver erased, placed by an `object: string` PARAMETER | 5 |
 | receiver erased, placed by an `UNTYPED_RECEIVERS` row | 5 |
 
-| object name spelled inline | 116 |
+| object name spelled inline | 117 |
 | object name spelled through a `const` | 68 |
 | object name is an `object: string` parameter | 7 |
-| object name is some other run-time expression | 70 |
+| object name is some other run-time expression | 71 |
 
 ### Subtractions the census could NOT defend — enforced
 
@@ -307,13 +307,13 @@ holds still. They are required to be HERE and to say WHEN they were true;
 their values are not compared. The reasoning, and the measurement behind it,
 are in `scripts/check-tenant-audit-census.mjs`.
 
-Measured on 2026-11-05 at `e40e04854`.
+Measured on 2026-11-06 at `ebd0dbc44`.
 
 | corpus scale (not enforced) | count |
 | :--- | ---: |
-| tracked non-test sources scanned | 871 |
-| engine-shaped types recognised | 105 |
-| declared objects in the registry | 127 |
-| same-named calls subtracted as non-engine | 229 |
+| tracked non-test sources scanned | 1035 |
+| engine-shaped types recognised | 111 |
+| declared objects in the registry | 130 |
+| same-named calls subtracted as non-engine | 232 |
 
 {/* END GENERATED: tenant-audit-census */}
@@ -33,19 +33,19 @@ silent, and `node scripts/tenant-audit-census.mjs --write` is the resolution.
 
 | Measure | Value |
 |---|---:|
-| Write call sites | 261 |
-| Object name statically decidable | 184 |
-| Object name chosen at run time | 77 |
-| Against a tenancy-enabled object | 178 |
+| Write call sites | 263 |
+| Object name statically decidable | 185 |
+| Object name chosen at run time | 78 |
+| Against a tenancy-enabled object | 179 |
 | Against an object declaring tenancy off | 6 |
-| Threading a tenant context | 198 |
+| Threading a tenant context | 199 |
 | Provably carrying none | 8 |
 | …and decidably tenancy-enabled | 2 |
-| Options argument unreadable | 55 |
-| …and decidably tenancy-enabled | 29 |
+| Options argument unreadable | 56 |
+| …and decidably tenancy-enabled | 30 |
 | Threading a decidably elevated context | 144 |
 | Threading a decidably non-elevated context | 0 |
-| Threading a context of undecidable elevation | 109 |
+| Threading a context of undecidable elevation | 111 |
 
 ## Subtractions the census could NOT defend — enforced
 
@@ -90,14 +90,14 @@ holds still. They are required to be HERE and to say WHEN they were true;
 their values are not compared. The reasoning, and the measurement behind it,
 are in `scripts/check-tenant-audit-census.mjs`.
 
-Measured on 2026-11-05 at `e40e04854`.
+Measured on 2026-11-06 at `ebd0dbc44`.
 
 | corpus scale (not enforced) | count |
 | :--- | ---: |
-| tracked non-test sources scanned | 871 |
-| engine-shaped types recognised | 105 |
-| declared objects in the registry | 127 |
-| same-named calls subtracted as non-engine | 229 |
+| tracked non-test sources scanned | 1035 |
+| engine-shaped types recognised | 111 |
+| declared objects in the registry | 130 |
+| same-named calls subtracted as non-engine | 232 |
 
 ## Every site
 
@@ -271,7 +271,8 @@ Measured on 2026-11-05 at `e40e04854`.
 | `packages/services/service-storage/src/file-reference-lifecycle.ts` | `update` | `sys_file` | enabled | elevated | 2 |
 | `packages/services/service-storage/src/metadata-store.ts` | `delete` | `sys_file` | enabled | options unreadable | 1 |
 | `packages/services/service-storage/src/metadata-store.ts` | `insert` | `sys_file` | enabled | options unreadable | 1 |
-| `packages/services/service-storage/src/metadata-store.ts` | `update` | `sys_file` | enabled | options unreadable | 1 |
+| `packages/services/service-storage/src/metadata-store.ts` | `update` | `sys_file` | enabled | options unreadable | 2 |
 | `packages/services/service-storage/src/metadata-store.ts` | `delete` | `sys_upload_session` | enabled | options unreadable | 1 |
 | `packages/services/service-storage/src/metadata-store.ts` | `insert` | `sys_upload_session` | enabled | options unreadable | 1 |
 | `packages/services/service-storage/src/metadata-store.ts` | `update` | `sys_upload_session` | enabled | options unreadable | 2 |
+| `packages/services/service-storage/src/record-file-access.ts` | `update` | `state.object` | undecidable | context, elevation undecidable | 1 |