@@ -0,0 +1,10 @@
+---
+"@objectstack/rest": minor
+---
+
+`metaSaveRequestOptions` is exported: the one mapping from a `PUT /meta/:type/:name` request's `If-Match`, `If-None-Match` and `?mode=draft` to `saveMetaItem`'s `parentVersion` and `mode`
+
+Clause-②: yes (widening)
+
+- `RestServer`'s `PUT /api/v1/meta/:type/:name` door now reads its precondition and its lifecycle through this function. The runtime dispatcher's `/meta` door, the one behind the `@objectstack/hono` catch-all, reads them through it too, so the two doors cannot answer the same save differently. It accepts a `Headers`-like object (`get`) or a plain header record, plus the query. It answers `{ ok: true, request }`, where `request` holds only the members the caller asked for, or `{ ok: false, message }`, the sentence of a `400`.
+- Unchanged: `RestServer`'s answers. The token still has ETag quotes stripped, `If-None-Match: *` still pins "no row of this lifecycle", and the two `400` refusals keep their wording. `?mode=draft`, matched case-insensitively, still stages a draft. Any other `mode` value is still an active save.
@@ -0,0 +1,11 @@
+---
+"@objectstack/runtime": patch
+---
+
+The runtime dispatcher's `PUT /meta/:type/:name` honours `If-Match`, `If-None-Match: *` and `?mode=draft`, so a host that mounts the `@objectstack/hono` catch-all no longer overwrites a pinned save or publishes a draft save
+
+Clause-②: no
+
+- Behind `createHonoApp`'s `${prefix}/*` catch-all, this door handed `saveMetaItem` no `parentVersion` and no `mode`. A stale `If-Match` wrote (`200`, not `409`), `If-None-Match: *` over an existing row wrote, and a `?mode=draft` save landed on the ACTIVE row with a receipt saying `state: 'active'`, so every draft edit went live without a publish. The door now reads the request through `metaSaveRequestOptions` from `@objectstack/rest`, the same mapping `RestServer`'s `PUT` door reads it through. It answers as that door does: `409 METADATA_CONFLICT` for a stale token or for `*` over an existing row, a draft row that leaves the active row alone, and `400 VALIDATION_ERROR` for `If-Match` sent beside `If-None-Match` or for an `If-None-Match` other than `*`. Each refusal writes nothing.
+- A host whose protocol has no `saveMetaItem` falls back to the metadata service's `saveItem(type, name, item)`, which cannot carry a precondition or a lifecycle. A save that asks for one there is now refused `501 NOT_IMPLEMENTED` and is not written.
+- Unchanged: a save that sends neither header and no `?mode=draft` writes the active row, last writer wins, as before. The refusal envelope is this transport's own (`{ success: false, error: { code, message, httpStatus } }`).
@@ -168,3 +168,18 @@ export type {
     MetaTypeReadRefusal,
     MetaTypeWriteRefusal,
 } from './meta-item-read-gate.js';
+
+// [#22141] …and the write side of the same parity: the precondition
+// (`If-Match` / `If-None-Match: *` → `parentVersion`, with its two `400`
+// refusals) and the lifecycle (`?mode=draft` → `mode`) a `PUT /meta/:type/:name`
+// asks `saveMetaItem` for. `RestServer` reads them through it, and so does the
+// runtime dispatcher's `/meta` domain — the only answer behind the
+// `@objectstack/hono` catch-all, which dropped all three until this landed.
+// Each door hands in its own headers and query and writes a refusal in its own
+// envelope (`meta-save-request.ts`'s header is the authority).
+export { metaSaveRequestOptions } from './meta-save-request.js';
+export type {
+    MetaSaveRequestHttp,
+    MetaSaveRequestMembers,
+    MetaSaveRequestOptions,
+} from './meta-save-request.js';
@@ -35,6 +35,13 @@
  * Spellings it cannot see — a switch read under another name, a draft asked
  * for by a spread of the raw query — are review questions, not rows; the
  * behaviour pins are what hold the doors it names.
+ *
+ * [#22141] `PUT /meta/:type/:name?mode=draft` — a `write` switch — is no row
+ * here because it is no longer read in this file: the door asks
+ * `metaSaveRequestOptions` (`meta-save-request.ts`), the one mapping the
+ * runtime dispatcher's `/meta` door asks too, after its write-capability gate.
+ * Its behaviour is held by `meta-compound-save-mode-parity.test.ts` and by both
+ * doors' rows in `packages/runtime/src/domains/meta-save-preconditions-parity.test.ts`.
  */
 
 import { describe, it, expect } from 'vitest';
@@ -160,11 +167,6 @@ const LEDGER: readonly LedgerRow[] = [
         disposition: 'read',
         door: 'GET /meta/:type/:name?preview=draft — the draft overlaid on the active item',
     },
-    {
-        site: "PUT ${metaPath}/:type/:name » req.query.mode.toLowerCase() === 'draft'",
-        disposition: 'write',
-        door: 'PUT /meta/:type/:name?mode=draft — SAVES a draft; admitted by the write-capability gate first',
-    },
     {
         site: "DELETE ${metaPath}/:type/:name » req.query.state.toLowerCase() === 'draft'",
         disposition: 'write',
 
@@ -0,0 +1,127 @@
+// Copyright (c) 2026 ObjectStack. Licensed under the Apache-2.0 license.
+
+/**
+ * [#22141] What a `PUT /meta/:type/:name` request asks of `saveMetaItem`
+ * beyond the item itself — the ADR-0008 precondition and the ADR-0033
+ * lifecycle — read ONCE, here, for both doors that serve that route:
+ * `RestServer`'s `PUT` and the runtime dispatcher's `/meta` domain, which is
+ * the only answer on a host that mounts just `@objectstack/hono`'s
+ * `${prefix}/*` catch-all.
+ *
+ * The dispatcher's door read neither. It handed `saveMetaItem` no
+ * `parentVersion` and no `mode`, so through the catch-all a stale `If-Match`
+ * wrote (`200`, not `409`), `If-None-Match: *` over an existing row wrote, and
+ * a `?mode=draft` save landed ACTIVE — a draft went live without a publish,
+ * past ADR-0033's gate, with a `200` the client read as success. Both doors now
+ * call this one mapping, so they cannot answer the same request differently.
+ *
+ * What travels is the decision and nothing transport-shaped: each door hands
+ * in its own request members ({@link MetaSaveRequestHttp}), spreads
+ * `request` into its `saveMetaItem` literal, and writes a refusal on its own
+ * wire, in its own envelope — the split `metaRequestLocale` makes. Every key
+ * of `request` is ABSENT unless the caller asked for it, so an unguarded,
+ * active save reaches `saveMetaItem` exactly as before.
+ *
+ * ## The precondition (moved here unchanged from `RestServer`, #22114)
+ *
+ * `parentVersion` is the `If-Match` token (ETag-style quotes stripped), `null`
+ * for `If-None-Match: *` ("no row of this lifecycle is here", the first-write
+ * pin the protocol has always declared), or absent for neither (unpinned,
+ * last-write-wins).
+ *
+ * `If-None-Match` is read with a CLOSED value set, `*` alone (AGENTS.md
+ * 〈Route & surface ownership〉 rule 5's reason, one carrier over): a header
+ * read for the values it knows and dropped otherwise would write a caller
+ * unguarded who asked for a guard. Measured before it landed: no first-party
+ * client sends `If-None-Match` on a `PUT` (the SDK sends it only on its cached
+ * `GET`, objectui's ETag hook has no caller). Two refusals, both `400`:
+ *
+ *  - a value other than `*` — an entity-tag list asks "write unless the head is
+ *    one of these", a condition no `/meta` client has and neither door
+ *    evaluates;
+ *  - `If-None-Match` beside `If-Match` — the pair can never hold (RFC 9110
+ *    §13.2.2 evaluates both: `If-Match` true needs a current row, `*` true
+ *    needs none), and a `409` would send the caller round a re-read that
+ *    serves a token it would pair with `*` again.
+ *
+ * ## The lifecycle
+ *
+ * `?mode=draft` (any case) is `mode: 'draft'`: the save stages a draft row and
+ * leaves the active row alone. Any other value is an active save, as it has
+ * always been on `RestServer`.
+ *
+ * `query.mode` is read as the string a door has already judged for
+ * multiplicity. `RestServer` calls this AFTER `refuseRepeatedQueryParams`,
+ * which refuses a repeated `mode` and unwraps one occurrence encoded as an
+ * array; the `@objectstack/hono` catch-all flattens its query from the URL, one
+ * string per name. ⛔ So call it after your own multiplicity gate, never
+ * before: an array reaching here is not read as a draft.
+ */
+
+import type { SaveMetaItemRequest } from '@objectstack/spec/api';
+
+/** The two request members a save's precondition and lifecycle are read from — each door hands in its own. */
+export interface MetaSaveRequestHttp {
+    /** A `Headers`-like (`get`) — the Fetch `Request` the catch-all hands on — or a plain header record. */
+    readonly headers?: unknown;
+    readonly query?: Readonly<Record<string, unknown>>;
+}
+
+/** The `saveMetaItem` members {@link metaSaveRequestOptions} answers, each present only when the request asked for it. */
+export type MetaSaveRequestMembers = Pick<SaveMetaItemRequest, 'parentVersion' | 'mode'>;
+
+/** {@link metaSaveRequestOptions}'s answer: the members to spread into the save, or the sentence of a `400`. */
+export type MetaSaveRequestOptions =
+    | { readonly ok: true; readonly request: MetaSaveRequestMembers }
+    | { readonly ok: false; readonly message: string };
+
+/**
+ * One request header, read from either shape a door hands in. `Headers.get`
+ * answers `null` for an absent header; that is folded to `undefined`, the
+ * record shape's absence, so both shapes ask the same question below.
+ */
+function requestHeader(headers: unknown, lower: string, canonical: string): unknown {
+    if (!headers || typeof headers !== 'object') return undefined;
+    const h = headers as { get?: unknown } & Record<string, unknown>;
+    if (typeof h.get === 'function') return (h.get as (name: string) => unknown).call(headers, lower) ?? undefined;
+    return h[lower] ?? h[canonical];
+}
+
+/**
+ * [#22141] The precondition and lifecycle a `PUT /meta/:type/:name` request
+ * asks `saveMetaItem` for — see this module's header.
+ */
+export function metaSaveRequestOptions(http: MetaSaveRequestHttp): MetaSaveRequestOptions {
+    const ifMatch = requestHeader(http.headers, 'if-match', 'If-Match');
+    const ifNoneMatch = requestHeader(http.headers, 'if-none-match', 'If-None-Match');
+    let parentVersion: string | null | undefined;
+    if (ifNoneMatch !== undefined) {
+        if (ifMatch !== undefined) {
+            return {
+                ok: false,
+                message: 'Send If-Match or If-None-Match, not both. If-Match: <version> saves only over that '
+                    + 'version; If-None-Match: * saves only where no row of this lifecycle exists. A row '
+                    + 'cannot both exist and not exist, so this pair can never be honoured.',
+            };
+        }
+        if (typeof ifNoneMatch !== 'string' || ifNoneMatch.trim() !== '*') {
+            return {
+                ok: false,
+                message: 'If-None-Match on this route takes "*" alone (save only if no row of this lifecycle '
+                    + 'exists). To pin a save to the version you read, send it as If-Match: <version>.',
+            };
+        }
+        parentVersion = null;
+    } else if (typeof ifMatch === 'string') {
+        parentVersion = ifMatch.replace(/^"|"$/g, '');
+    }
+    const mode = http.query?.mode;
+    const draft = typeof mode === 'string' && mode.toLowerCase() === 'draft';
+    return {
+        ok: true,
+        request: {
+            ...(parentVersion !== undefined ? { parentVersion } : {}),
+            ...(draft ? { mode: 'draft' as const } : {}),
+        },
+    };
+}
@@ -213,6 +213,9 @@ import type {
 // to the implementation is a governed-surface edit, so it is left to the
 // maintainer; this line goes when that row moves.
 export { filterAppForUser } from './meta-item-read-gate.js';
+// [#22141] The `PUT /meta/:type/:name` door's precondition and lifecycle, read
+// through the ONE mapping the runtime dispatcher's `/meta` domain asks too.
+import { metaSaveRequestOptions } from './meta-save-request.js';
 import type { ISecurityService } from '@objectstack/spec/contracts';
 import {
     resolveEffectiveApiMethods,
@@ -1717,57 +1720,6 @@ function mayReadPendingDrafts(caller: unknown): boolean {
     return isObjectSchemaMaskExempt(caller);
 }
 
-/**
- * [#22114] The ADR-0008 pin `PUT /meta/:type/:name` reads off its request
- * headers: `parentVersion` for `saveMetaItem` — the `If-Match` token (ETag-style
- * quotes stripped), `null` for `If-None-Match: *` ("no row of this lifecycle
- * is here", the first-write pin the protocol has always declared), or
- * `undefined` for neither (unpinned, last-write-wins, as before) — or the
- * sentence of a `400` for a pin that cannot be honoured.
- *
- * `If-None-Match` is read on this route from the day it lands with a CLOSED
- * value set, `*` alone (AGENTS.md 〈Route & surface ownership〉 rule 5's reason,
- * one carrier over): a header read for the values it knows and dropped
- * otherwise would write a caller unguarded who asked for a guard. Measured
- * before it landed: no first-party client sends `If-None-Match` on a `PUT`
- * (the SDK sends it only on its cached `GET`, objectui's ETag hook has no
- * caller), and nothing on this path read it. Two refusals, both `400`:
- *
- *  - a value other than `*` — an entity-tag list asks "write unless the head is
- *    one of these", a condition no `/meta` client has and this door does not
- *    evaluate;
- *  - `If-None-Match` beside `If-Match` — the pair can never hold (RFC 9110
- *    §13.2.2 evaluates both: `If-Match` true needs a current row, `*` true
- *    needs none), and a `409` would send the caller round a re-read that
- *    serves a token it would pair with `*` again.
- */
-function metaSavePreconditionPin(headers: Record<string, unknown> | undefined):
-    | { ok: true; parentVersion?: string | null }
-    | { ok: false; message: string } {
-    const ifMatch = headers?.['if-match'] ?? headers?.['If-Match'];
-    const ifNoneMatch = headers?.['if-none-match'] ?? headers?.['If-None-Match'];
-    if (ifNoneMatch !== undefined) {
-        if (ifMatch !== undefined) {
-            return {
-                ok: false,
-                message: 'Send If-Match or If-None-Match, not both. If-Match: <version> saves only over that '
-                    + 'version; If-None-Match: * saves only where no row of this lifecycle exists. A row '
-                    + 'cannot both exist and not exist, so this pair can never be honoured.',
-            };
-        }
-        if (typeof ifNoneMatch !== 'string' || ifNoneMatch.trim() !== '*') {
-            return {
-                ok: false,
-                message: 'If-None-Match on this route takes "*" alone (save only if no row of this lifecycle '
-                    + 'exists). To pin a save to the version you read, send it as If-Match: <version>.',
-            };
-        }
-        return { ok: true, parentVersion: null };
-    }
-    if (typeof ifMatch === 'string') return { ok: true, parentVersion: ifMatch.replace(/^"|"$/g, '') };
-    return { ok: true };
-}
-
 /**
  * [#22128] The ONE reading of `?package=` on the `/meta/:type/:name` item doors
  * — the read (`GET`), the save (`PUT`) and the publish
@@ -7160,14 +7112,25 @@ export class RestServer {
                     // stored content hash, never the hash itself; the protocol
                     // compares it in that form, so it passes through here as sent.
                     // [#22114] The item read serves the same token as `version`,
-                    // and `If-None-Match: *` pins a save that expects no row —
-                    // see {@link metaSavePreconditionPin}.
-                    const pin = metaSavePreconditionPin(req.headers);
-                    if (!pin.ok) {
-                        res.status(400).json({ error: { code: 'VALIDATION_ERROR', message: pin.message } });
+                    // and `If-None-Match: *` pins a save that expects no row.
+                    // [#22141] The pin and `?mode=draft` are read through
+                    // {@link metaSaveRequestOptions} — the ONE mapping the
+                    // runtime dispatcher's `/meta` door asks too, so the
+                    // `@objectstack/hono` catch-all cannot answer this request
+                    // differently. Its `request` members are spread into the
+                    // save below, each present only when the caller asked.
+                    //
+                    // The multiplicity guard runs FIRST: it refuses a repeated
+                    // `force`, `package` or `mode` (see the `force` read below
+                    // for why that one is sharp) and UNWRAPS one occurrence
+                    // encoded as an array, so `?mode=` reaches the mapping as
+                    // the string it reads.
+                    if (refuseRepeatedQueryParams(req, res, ['force', 'package', 'mode'])) return;
+                    const saveOptions = metaSaveRequestOptions({ headers: req.headers, query: req.query });
+                    if (!saveOptions.ok) {
+                        res.status(400).json({ error: { code: 'VALIDATION_ERROR', message: saveOptions.message } });
                         return;
                     }
-                    const parentVersion = pin.parentVersion;
                     // [#7749 producer, #7941 precedence] The request's authenticated
                     // identity — one producer, shared by every `/meta` write (see
                     // resolveMetaWriteActor). `X-Actor` is not consulted.
@@ -7181,8 +7144,8 @@ export class RestServer {
                     // string, and a non-empty array is truthy — so
                     // `?force=false&force=false`, a caller repeating an explicit
                     // OPT-OUT, turned the destructive-change guard ON. An
-                    // inversion, on a destructive verb, reported as 200.
-                    if (refuseRepeatedQueryParams(req, res, ['force', 'package', 'mode'])) return;
+                    // inversion, on a destructive verb, reported as 200. The
+                    // multiplicity guard above refuses it before this read.
                     const forceRaw = req.query?.force;
                     const force = typeof forceRaw === 'string'
                         ? ['true', '1', 'yes', 'on'].includes(forceRaw.toLowerCase())
@@ -7291,13 +7254,13 @@ export class RestServer {
                         // a client cannot smuggle a face in.
                         writeFace: 'meta-envelope',
                         ...(environmentId ? { environmentId } : {}),
-                        ...(parentVersion !== undefined ? { parentVersion } : {}),
+                        // `parentVersion` and `mode`, each only when asked —
+                        // a closed two-key object read off the headers and the
+                        // query, never the body.
+                        ...saveOptions.request,
                         ...(actor ? { actor } : {}),
                         ...(force ? { force: true } : {}),
                         ...(packageId ? { packageId } : {}),
-                        ...((typeof req.query?.mode === 'string'
-                            && req.query.mode.toLowerCase() === 'draft')
-                            ? { mode: 'draft' } : {}),
                     };
                     const result = await p.saveMetaItem(saveRequest);
                     res.json(result);