@@ -0,0 +1,39 @@
+---
+'@objectstack/spec': minor
+'@objectstack/service-automation': minor
+'@objectstack/metadata-protocol': minor
+---
+
+feat(spec)!: the ADR-0078 conversion-conflict channel is retired — `CONVERSION_CONFLICT_CODE`, `ConversionConflictNotice`, `ConversionConflictDetail`, the `onConflict` / `reservedNodeTypes` conversion options, the `conflicts` arrays and the `FLOW_CONVERSION_CONFLICT` 409
+
+Clause-②: yes (narrowing)
+
+**BREAKING (published API):** the ADR-0087 conversion API carried a channel for a rename REFUSED because its old token was a live name in the environment: a conversion reported it through `ConversionContext.reportConflict`, `applyConversions` handed it to an `onConflict` sink as a `ConversionConflictNotice` (code `OS_METADATA_CONVERSION_CONFLICT`), the automation engine collected it in `canonicalizeStoredFlow`'s `conflicts` array, and the metadata protocol answered it with `409 FLOW_CONVERSION_CONFLICT`. Its only producer was the live-executor guard inside the flow-node HTTP callout rename. Protocol 18 reserved those three names (`FLOW_RESERVED_NODE_TYPES`), so the engine refuses an executor under one, no live owner can exist, and the guard went. Nothing can raise a conversion conflict any more, so the channel leaves the published surface rather than staying as a live-looking failure mode nothing triggers.
+
+## FROM → TO
+
+| you wrote | write instead |
+| --- | --- |
+| `import { CONVERSION_CONFLICT_CODE, type ConversionConflictNotice, type ConversionConflictDetail } from '@objectstack/spec'` | delete the import — no replacement |
+| `applyConversions(stack, { onConflict, reservedNodeTypes, … })` (likewise `applyConversionsToFlow`, `applyConversionsToStoredItem`, `collectConversionNotices`) | delete both options; keep `onNotice` / `onTodo` |
+| a conversion's `apply` reading `context.reservedNodeTypes` or calling `context.reportConflict` | a rename over an open namespace reserves its old names instead (the `FLOW_RESERVED_NODE_TYPES` pattern), so the refusal happens at registration; a site with no lossless rewrite goes to `context.reportTodo` |
+| an `IAutomationService.canonicalizeStoredFlow` implementation returning `conflicts: […]` (or a `StoredFlowCanonicalization` from `@objectstack/metadata-protocol` carrying one) | drop the member; return `parsed`, `storable`, `notices` and optionally `todos` |
+| a client branch on `error.code === 'FLOW_CONVERSION_CONFLICT'` / HTTP 409 from a flow save, a package duplication or an unmanaged package import | delete the branch — no request can produce it |
+
+**The one-line fix:** delete every reference; the branch it guarded was already dead, so deleting it changes no behaviour.
+
+**What an upgrader sees.** Importing a removed name is `TS2305`; passing a removed option, or returning a `conflicts` member from a typed canonicalizer, is an excess-property `tsc` error. `ErrorCode` no longer parses `FLOW_CONVERSION_CONFLICT`.
+
+**Runtime behaviour is unchanged.** The removed branches could not fire: a stored flow carrying a reserved callout name still loads as `http` (the rewrite has been unconditional since the names were reserved), and `saveMetaItem`, `duplicatePackage`, `importUnmanagedPackage` and `os migrate meta --stored` answer exactly as before. No metadata document needs editing.
+
+## The retirement kit
+
+- **`@objectstack/spec`:** the three exports leave the root; `ApplyConversionsOptions` loses `onConflict` and `reservedNodeTypes`, `ConversionContext` loses `reservedNodeTypes` and `reportConflict`, the `IAutomationService.canonicalizeStoredFlow` result loses `conflicts`; the error-code ledger drops `FLOW_CONVERSION_CONFLICT` by its own "Retiring a code" rule (a row comes out with its last emitter).
+- **`@objectstack/service-automation`:** `AutomationEngine.canonicalizeStoredFlow` no longer returns `conflicts`, and the engine no longer builds a live-name set for the conversion pass.
+- **`@objectstack/metadata-protocol`:** `StoredFlowCanonicalization` loses `conflicts`; the flow save door's 409, the stored-migration pass's `failed` row for a refused rename, `duplicatePackage`'s failed item and `importUnmanagedPackage`'s 409 are gone with it.
+- **The D3 entry `conversion-conflict-channel-removed`.** No D2 conversion and no tombstone: no metadata document ever carried any of it.
+- **No deprecation window**, per the project's startup-stage posture.
+
+⚠️ **The out-of-repo consumer population is NOT MEASURED.** The three packages are published, so this is breaking for consumers no telemetry was consulted for.
+
+<!-- adr-0087: registered conversion-conflict-channel-removed -->
@@ -1610,7 +1610,6 @@ can produce, because both supply a live one.
 | A row stored under a non-canonical metadata type (a plural or alias spelling, e.g. `fields`) | Canonicalizing bodies is an edit; rewriting a stored *type* spelling is an identity move — a new `(org, type, name, package_id)` key — which this pass is not ruled to make. Re-author the item under its canonical type and drop the old row |
 | Types with no repository write path (`agent`) | Their write path records no history and would force a draft live — a half-write is worse than leaving the row to the read path |
 | Rows that still fail the current schema after conversion | That is a genuine contract violation, not chain-owned history. The write path's rejection is correct; fix the row in Studio |
-| A flow whose rename the conflict guard refused | The old node-type token is a live name something else owns here. Rewriting would clobber that owner, so the row fails loudly naming the token — never a silent skip |
 | A site the conversion chain leaves as stored because no lossless rewrite exists — above all a page filter carrying `$and` / `$or` / `$not` | Flattening a combinator changes which rows the page selects, so it is never done. Each site is printed as a `TODO` line under its row — path, block, and what blocks the rewrite — whatever the row's outcome; a row with nothing but TODOs is reported `skipped`. It does not fail the run, since no run of this pass can clear it: rewrite each site by hand |
 | A stored shape protocol 18 refuses and no conversion rewrites — a `controlled_by_parent` object without exactly one required `master_detail` (two masters, none, a required `lookup` only, an explicit `required: false`), a view bound to the retired view-level API data source or a page component whose `data` prop binds it (`object-grid`, `object-map`, `object-gantt`, `object-tree`), a flow value slot carrying a `{…}` token (a `get_record` / `update_record` / `delete_record` filter operand among them) | Each would need a choice only its owner can make — which master, which page, what an absent value should do — so it is never rewritten. Each site is printed as a `TODO` line under its row, naming the step-18 entry that refuses it, the object, view, page component or flow node, and the owner's choices; a binding's request headers are withheld. Until it is rewritten by hand, the row is refused: an object registers but derives no master, a view registers under `[metadata_spec_invalid]`, a page still loads, its next save is refused at the metadata save door (422), and `os validate`, `os build` and `os lint` refuse the binding in source, and a flow is not registered |
 | Any other site `registerFlow` refuses in a stored flow the parse accepts — a text slot's template hole, a decision's `mode`, a malformed predicate, a plugin node's undeclared config key, an `api` flow with no secret | The flow's own definition is wrong, and no conversion rewrites it. Each site is printed as a `TODO registerFlow` line under its row, in the words `registerFlow` refuses it with; a site already listed under a step-18 entry is not repeated. Until it is fixed, the flow is not registered at boot and never runs. A flow the parse itself refuses is reported among the rows that could not be rewritten, in the parse's words |
@@ -1627,9 +1626,9 @@ an `--apply` run alike. The list changes no row, no count and no exit code. Wher
 a node meant every branch, declare `mode: 'inclusive'` on it; declaring `mode`
 either way takes it off the list.
 
-**Flows are covered, and cost one extra plugin.** Flow-node conversions carry an
-open-namespace conflict guard that has to consult the *live* executor registry
-to tell a rename from a clobber, so this run boots the automation engine — in an
+**Flows are covered, and cost one extra plugin.** A flow canonicalizes at the
+automation engine, whose registration checks judge a plugin node against the
+*live* node registry, so this run boots the automation engine — in an
 inert mode that installs the node registry and then arms nothing: no flow
 registered, no record trigger or scheduled job bound, no connector
 materialized, no suspended run resumed. A migration process must not become a
@@ -1684,7 +1683,7 @@ It returns the same report the CLI renders, and takes the same posture:
 `manage_metadata` capability — it rewrites every eligible row in the deployment,
 not one item — and answers `403` otherwise. Flows need no extra setup on this
 path: the server already holds a live automation engine, so the run resolves the
-executor registry the conflict guard needs from the process it is running in.
+node registry the registration checks need from the process it is running in.
 
 #### `os migrate duplicates`
 
 
@@ -28,7 +28,7 @@ const result = ApiErrorSchema.parse(data);
 
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
-| **code** | `Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| 'INVALID_FORMAT' \| 'VALUE_TOO_LONG' \| 'VALUE_TOO_SHORT' \| 'VALUE_OUT_OF_RANGE' \| … +333 more>` | ✅ | Error code (e.g. VALIDATION_ERROR; StandardErrorCode ∪ the ledger the serving side registers — ERROR_CODE_LEDGER for framework packages) |
+| **code** | `Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| 'INVALID_FORMAT' \| 'VALUE_TOO_LONG' \| 'VALUE_TOO_SHORT' \| 'VALUE_OUT_OF_RANGE' \| … +332 more>` | ✅ | Error code (e.g. VALIDATION_ERROR; StandardErrorCode ∪ the ledger the serving side registers — ERROR_CODE_LEDGER for framework packages) |
 | **declaredCode** | `string` | optional | The producer-declared code, verbatim, when it is not a member of the closed `code` vocabulary — the open, author-authored channel (app-specific spellings; ADR-0112) |
 | **message** | `string` | ✅ | Readable error message |
 | **userMessage** | `string` | optional | Producer-marked user-facing refusal text, verbatim. Present exactly when the producer opted in at throw time; consumers render it to end users and keep their generic substitution for anything unmarked. Status-agnostic; never replaces `message`. |
@@ -193,7 +193,6 @@ const result = ApiErrorSchema.parse(data);
 * `FILTER_TOKEN_UNRESOLVED`
 * `FIND_HOOK_RESULT_NOT_ARRAY`
 * `FIND_ONE_HOOK_RESULT_NOT_RECORD`
-* `FLOW_CONVERSION_CONFLICT`
 * `FLOW_DISABLED`
 * `FLOW_FAILED`
 * `FLOW_INPUT_SCHEMA_INVALID`
 
@@ -360,7 +360,6 @@ const result = ErrorCode.parse(data);
 * `FILTER_TOKEN_UNRESOLVED`
 * `FIND_HOOK_RESULT_NOT_ARRAY`
 * `FIND_ONE_HOOK_RESULT_NOT_RECORD`
-* `FLOW_CONVERSION_CONFLICT`
 * `FLOW_DISABLED`
 * `FLOW_FAILED`
 * `FLOW_INPUT_SCHEMA_INVALID`
 
@@ -1477,8 +1477,8 @@ export default class MigrateMeta extends Command {
     try {
       // `PlatformObjectsPlugin` for `sys_metadata` and its history/audit
       // siblings, plus the automation engine in INERT mode so `flow` rows are
-      // covered too (#4454) — flow-node conversions need its executor registry
-      // for the conflict guard, and `armRuntime: false` means taking it arms
+      // covered too (#4454) — a flow canonicalizes at the engine, whose
+      // registration checks need its node registry, and `armRuntime: false` means taking it arms
       // nothing. No storage adapter: unlike the file migration, nothing here
       // reads bytes.
       //
@@ -1520,8 +1520,8 @@ export default class MigrateMeta extends Command {
         await import('@objectstack/metadata-protocol');
 
       // No `canonicalizeFlow` is threaded from here. The automation engine
-      // canonicalizes `flow` rows — it holds the executor registry ADR-0078's
-      // conflict guard needs (#4454) — and the protocol resolves it from the
+      // canonicalizes `flow` rows — it holds the node registry its
+      // registration checks need (#4454) — and the protocol resolves it from the
       // kernel's service table itself (#4498), which is the same table the
       // inert engine this command boots registers into. Passing it again would
       // be a second route to one capability, and the two would drift.
@@ -1591,13 +1591,14 @@ export default class MigrateMeta extends Command {
           );
         } else if (report.failed > 0) {
           // [#23391] Only what holds for every failed kind, then what does not
-          // work. The stored pass marks a row `failed` four ways: a body that is
-          // not valid JSON, a flow that does not canonicalize, a flow rename
-          // refused over a live name, and (on --apply) a rewrite the store
-          // refused. It writes none of them, so each reads as it did before the
-          // run. This line used to add "they keep reading canonically through
-          // the chain, so nothing is broken", which is false for two of the
-          // four. A body that is not valid JSON loads at no read. A flow that
+          // work. The stored pass marks a row `failed` three ways: a body that
+          // is not valid JSON, a flow that does not canonicalize, and (on
+          // --apply) a rewrite the store refused (a fourth, a flow rename
+          // refused over a live name, left with the conversion-conflict channel
+          // in protocol 18, #24001). It writes none of them, so each reads as it
+          // did before the run. This line used to add "they keep reading
+          // canonically through the chain, so nothing is broken", which is
+          // false for two of them. A body that is not valid JSON loads at no read. A flow that
           // does not canonicalize fails the same `canonicalizeFlow` parse inside
           // `AutomationEngine.registerFlow`, so no boot step registers it.
           // The report names no kind, so the flow sentence is gated on a failed
 
@@ -68,14 +68,14 @@ export async function buildDataMigrationPlugins(
   }
   if (opts.automation === true) {
     // `os migrate meta --stored` needs the automation ENGINE, never the
-    // automation RUNTIME (#4454). Flow-node conversions carry ADR-0078's
-    // open-namespace conflict guard, which consults the live executor registry
-    // to tell a rename from a clobber — and only this plugin has that registry.
+    // automation RUNTIME (#4454). A flow canonicalizes at the engine, whose
+    // registration checks judge a plugin node against the live node registry
+    // — and only this plugin has that registry.
     //
     // `armRuntime: false` is what makes taking it safe: the engine and the full
     // node registry come up (built-ins plus whatever `automation:ready`
-    // contributes, because a PARTIAL registry would make the guard rewrite over
-    // a live custom node type instead of refusing), and then nothing is armed —
+    // contributes, because a PARTIAL registry would make those checks judge a
+    // plugin node against no descriptor), and then nothing is armed —
     // no flow registered, no record trigger or scheduled job bound, no
     // declarative connector materialized, no suspended run resumed. A migration
     // process must not become a second server.
 
@@ -4,9 +4,9 @@
  * #4498 — the flow-skip becomes ONE seam, and `duplicatePackage` stops minting
  * pre-protocol flow rows.
  *
- * `convertStoredItem` returns `flow` bodies untouched, because flow-node
- * conversions carry ADR-0078's open-namespace conflict guard and that needs the
- * automation engine's live executor registry. #4454 built the capability
+ * `convertStoredItem` returns `flow` bodies untouched, because a flow
+ * canonicalizes at the automation engine, whose registration checks need its
+ * live node registry. #4454 built the capability
  * (`AutomationEngine.canonicalizeStoredFlow`) and handed it to
  * `migrateStoredMetadata` as an explicit hook, because the CLI has to boot an
  * engine of its own to hold one.
@@ -38,7 +38,7 @@ const flowBody = (config: Record<string, unknown>) => ({
 const canonicalizeStoredFlow = (_name: string, body: any) => {
     const node = body?.nodes?.[0];
     if (!node || !('filters' in (node.config ?? {}))) {
-        return { storable: body, notices: [], conflicts: [] };
+        return { storable: body, notices: [] };
     }
     const { filters, ...rest } = node.config;
     return {
@@ -51,7 +51,6 @@ const canonicalizeStoredFlow = (_name: string, body: any) => {
             path: 'flows[0].nodes[0].config',
             message: 'filters → filter',
         }],
-        conflicts: [],
     };
 };
 
@@ -155,7 +154,6 @@ describe('migrateStoredMetadata resolves the engine itself (#4498)', () => {
         const explicit = vi.fn((_n: string, body: any) => ({
             storable: { ...body, label: 'From the explicit hook' },
             notices: [],
-            conflicts: [],
         }));
         const registryHook = vi.fn(canonicalizeStoredFlow);
         const { protocol, saveMetaItem } = makeProtocol(
@@ -250,33 +248,6 @@ describe('duplicatePackage canonicalizes flow rows (#4498)', () => {
         expect(flow.item.nodes[0].config.objectName).toBe('iojn2_repair_ticket');
     });
 
-    it('a refused rename fails the item and names the token — never a silent legacy copy', async () => {
-        const conflicting = () => ({
-            storable: {},
-            notices: [],
-            conflicts: [{
-                conversionId: 'flow-node-type-open-namespace',
-                token: 'http_request',
-                path: 'flows[0].nodes[0].type',
-                message: 'a custom executor owns this node type here',
-            }],
-        });
-        const { protocol, saveMetaItem } = makeProtocol(
-            [legacyFlowRow],
-            new Map([['automation', { canonicalizeStoredFlow: conflicting }]]),
-        );
-
-        const res = await duplicate(protocol);
-
-        expect(res.failedCount).toBe(1);
-        expect(res.copiedCount).toBe(0);
-        expect(res.failed[0].error).toContain('http_request');
-        expect(res.failed[0].error).toContain('live name in this environment');
-        // The point of failing: copying the un-renamed body would mint exactly
-        // the row this fix exists to prevent.
-        expect(saveMetaItem).not.toHaveBeenCalled();
-    });
-
     it('a flow that cannot canonicalize fails the item with the reason', async () => {
         const throwing = () => { throw new Error("Unrecognized key: '_uiPosition'"); };
         const { protocol, saveMetaItem } = makeProtocol(