@@ -0,0 +1,99 @@
+---
+'@objectstack/spec': minor
+'@objectstack/platform-objects': patch
+---
+
+feat(spec)!: an agent's `memory` contract states exactly what the runtime honours — `maxEntries` and `reflectionInterval` are required once long-term memory is enabled, `longTerm.store` is retired, and the block is `live`, enforced by the cloud AI runtime (#20274)
+
+**BREAKING** — `agent.memory` narrows to what the cloud AI runtime, the one runtime
+that executes agents, actually does with it. That runtime recalls the newest
+`maxEntries` distilled notes for the user before the first round, writes one note
+every `reflectionInterval` delivered interactions, evicts notes beyond `maxEntries`,
+and keeps them in its own database store. Before an agent's first turn it refused
+exactly the declarations this spec still accepted, so authoring now refuses them,
+by name, with a prescription (ADR-0049 enforce-or-remove):
+
+- **`longTerm.maxEntries` and `reflectionInterval` are required when
+  `longTerm.enabled` is true.** No default is declared for either: none has a
+  measured basis, and the runtime adds none.
+- **`reflectionInterval` is refused without an enabled `longTerm`** — a reflection
+  writes a long-term note, so with none enabled it would do nothing.
+- **`longTerm.store` is retired as a whole key.** The memory store is platform
+  infrastructure, not agent metadata: the runtime keeps the notes in its own
+  database store, and refused `vector` (the key's default, so what an omitted
+  `store` parsed to) and `redis`. Its old spellings `backend`, `storage` and
+  `provider` under `longTerm` are answered with the same prescription instead of
+  being steered onto `store`.
+
+`longTerm.enabled` is unchanged.
+
+### FROM → TO
+
+| before | what to write instead |
+| --- | --- |
+| `memory.longTerm.store` — any value, `database` included | delete the key; where the notes are kept is the platform's choice. |
+| `longTerm: { enabled: true, … }` without `maxEntries` | add `maxEntries`: how many distilled notes are kept for each user (an integer of at least 1). |
+| `longTerm: { enabled: true, … }` without `memory.reflectionInterval` | add `reflectionInterval`: how many delivered interactions pass between the reflections that write a note (an integer of at least 1). |
+| `memory.reflectionInterval` without `longTerm.enabled: true` | enable long-term memory with both numbers, or delete `reflectionInterval`. |
+
+**The one-line fix: declare `maxEntries` and `reflectionInterval` when `longTerm.enabled`; delete `store`.**
+`os migrate meta --from 17` lists the mechanical edits for existing sources (the
+`store` deletion); the two numbers are the author's to choose.
+
+Each refusal is a parse error at the key's own path, naming the key and the fix, and
+`store` also fails `tsc` (its input type is `never`).
+
+### The retirement kit
+
+- **Tombstone.** `longTerm.store` is a `retiredKey()` carrying the prescription; the
+  three old alias spellings moved from `aliases` to `guidance`, because an alias may
+  not steer an author onto a tombstone.
+- **The contract check** is a refinement on `memory` (`reflectionInterval` is
+  `longTerm`'s sibling), one `custom` issue per missing or misplaced key. A JSON
+  Schema cannot state a value-conditioned requirement in the closed projection list,
+  so the published `ai/Agent` schema (and the four installed-package schemas that
+  embed agents) names the site in `x-dropped-refinements`, recorded in
+  `dropped-refinements.baseline.json`.
+- **D2 conversion `agent-memory-long-term-store-removed`** (step 18, retired from the
+  load path): it deletes `store` from `memory.longTerm`, whatever it holds — the
+  delete is lossless, because no value of it ever chose a backend. Stored
+  `sys_metadata` agent rows and built artifacts replay it; one notice per agent. It
+  supplies neither number.
+- **D3 entry `agent-memory-store-retired-and-limits-required`** carries the judgement
+  the conversion cannot make: the two numbers an enabled `longTerm` now requires.
+- **`RETIRED_KEYS_BY_MAJOR[18]`** registers `ai/Agent:memory.longTerm.store`.
+- **No deprecation window**, per the project's startup-stage posture.
+
+### Describes and the liveness ledger
+
+- `agent.memory` drops `[EXPERIMENTAL — not enforced]`: it states that the cloud AI
+  runtime enforces it and that the open framework edition does not run agents.
+  `longTerm`, `enabled`, `maxEntries` and `reflectionInterval` each state what the
+  runtime does with them.
+- The ledger row moves `experimental` → `live`, citing the cloud reader
+  `agent-runtime.ts#compileAgentMemory` (via `AgentRuntime.resolveTurnGuardrails`),
+  the enforcement in `ai-service.ts` and the store `agent-memory.ts#AgentMemoryStore`,
+  as attested by the cloud seat's reading at cloud `ef5a4344`, `verifiedAt`
+  2026-10-02. `os lint` / `os validate` no longer warn
+  `liveness-experimental-property` on an agent that sets `memory`.
+- ⚠️ **The window, stated.** At `ef5a4344` the cloud reader still reads `store`: it
+  honours `database` only and refuses `vector` and `redis`. Cloud drops `store` in
+  that one reader once this release reaches its pin, and no earlier.
+
+### The agent form's help texts
+
+- The `memory` row's help text on the agent metadata form named short-term memory,
+  a key the schema refuses. It now states what memory does and that `maxEntries`
+  and `reflectionInterval` are required once long-term memory is enabled.
+- The neighbouring `planning` row named a strategy and a replan switch the schema
+  does not declare; it now states the one key it has, the iteration cap.
+- The `platform-objects` metadata-form catalogs follow: the English leaves are
+  regenerated, and the `zh-CN`, `ja-JP` and `es-ES` leaves are authored, not copied.
+
+⚠️ **The out-of-repo consumer population is NOT MEASURED.** `@objectstack/spec` is
+published, and tenant-authored agents were not measured. This repo authors no
+`longTerm` outside `packages/spec`, and no cloud built-in agent declares one.
+
+Clause-②: yes (narrowing)
+
+<!-- adr-0087: registered agent-memory-long-term-store-removed, agent-memory-store-retired-and-limits-required -->
@@ -58,7 +58,7 @@ const result = AIModelConfigSchema.parse(data);
 | **access** | `string[]` | optional | Who can chat with this agent |
 | **permissions** | `string[]` | optional | Required permission-set capabilities |
 | **planning** | `{ maxIterations: integer }` | optional | Autonomous reasoning and planning configuration |
-| **memory** | `{ longTerm?: object; reflectionInterval?: integer }` | optional | [EXPERIMENTAL — not enforced] Agent memory management. Parsed but no runtime consumer yet. |
+| **memory** | `{ longTerm?: object; reflectionInterval?: integer }` | optional | Agent memory (long-term notes recalled before each conversation and written by periodic reflection), enforced by the cloud AI runtime; the open framework edition does not run agents. |
 | **guardrails** | `{ maxTokensPerInvocation?: integer; maxExecutionTimeSec?: integer; blockedTopics?: string[] }` | optional | Safety guardrails for the agent (token budget, time limit, blocked topics), enforced per user turn by the cloud AI runtime; the open framework edition does not run agents. |
 | **structuredOutput** | `{ format: Enum<'json_object' \| 'json_schema'>; schema?: Record<string, any>; strict: boolean; retryOnValidationFailure: boolean; … }` | optional | Structured output contract for the agent's final answer (JSON format, schema, retries, fallback format, transform steps), enforced on every final answer by the cloud AI runtime; the open framework edition does not run agents. |
 | **protection** | `{ lock: Enum<'none' \| 'no-overlay' \| 'no-delete' \| 'full'>; reason: string; docsUrl?: string }` | optional | Package author protection block — lock policy for this agent. |
@@ -101,8 +101,8 @@ const result = AIModelConfigSchema.parse(data);
 
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
-| **longTerm** | `{ enabled: boolean; store: Enum<'vector' \| 'database' \| 'redis'>; maxEntries?: integer }` | optional | Long-term / persistent memory |
-| **reflectionInterval** | `integer` | optional | Reflect every N interactions to improve behavior |
+| **longTerm** | `{ enabled: boolean; maxEntries?: integer }` | optional | Long-term memory: distilled notes kept per user and agent and recalled before each conversation |
+| **reflectionInterval** | `integer` | optional | Reflect every N delivered interactions: each reflection writes one distilled note to long-term memory. Required when longTerm.enabled is true, and refused without it |
 
 ### Nested Shape: `Agent.guardrails`
 
 
@@ -119,12 +119,13 @@ describe('lintLivenessProperties', () => {
     expect(ruleOf(findings, 'nodes.outputSchema')).toBe(LIVENESS_DEAD_PROPERTY);
   });
 
-  it('warns on an experimental prop with no authorWarn of its own (agent.memory)', () => {
+  it('warns on an experimental prop with no authorWarn of its own (tool.outputSchema)', () => {
     // `experimental` warns implicitly — shouldWarn() treats a declared-but-
     // unenforced guarantee like an opted-in dead prop. Repointed from
-    // action.undoable in #3714, which turned out to have two objectui readers.
-    const findings = lintLivenessProperties({ agents: [{ name: 'ag1', memory: { kind: 'buffer' } }] });
-    const f = findings.find((x) => x.message.includes('`memory`'));
+    // action.undoable in #3714, which turned out to have two objectui readers,
+    // and from agent.memory in #20274, which the cloud AI runtime enforces.
+    const findings = lintLivenessProperties({ tools: [{ name: 't1', outputSchema: { type: 'object' } }] });
+    const f = findings.find((x) => x.message.includes('`outputSchema`'));
     expect(f).toBeDefined();
     expect(f!.rule).toBe('liveness-experimental-property');
   });
@@ -930,12 +931,12 @@ describe('lintLivenessProperties', () => {
   describe('never throws on a malformed collection item (#11385)', () => {
     it('flat TYPE_COLLECTIONS loop: skips a null item and keeps walking past it', () => {
       const findings = lintLivenessProperties({
-        // agent.memory is a real, currently-`experimental` ledger row (see
+        // tool.outputSchema is a real, currently-`experimental` ledger row (see
         // "warns on an experimental prop" above) — a real ledger witness,
         // not a synthetic one.
-        agents: [null, { name: 'ag1', memory: { kind: 'buffer' } }],
+        tools: [null, { name: 't1', outputSchema: { type: 'object' } }],
       });
-      expect(paths(findings).some((m) => m.includes('`memory`'))).toBe(true);
+      expect(paths(findings).some((m) => m.includes('`outputSchema`'))).toBe(true);
     });
 
     it('object walk: skips a null item and keeps walking past it', () => {
@@ -1596,12 +1597,12 @@ describe('a per-type ledger that could not be READ is reported once (#19276)', (
   });
 
   it('keeps walking the types whose ledgers ARE readable, and puts the fault first', () => {
-    // agent.memory is a real `experimental` row, so this proves the fault does
-    // not abort the pass: one type is dark, the rest still enforce, and the
-    // line that explains the darkness is the one a reader meets first.
+    // tool.outputSchema is a real `experimental` row, so this proves the fault
+    // does not abort the pass: one type is dark, the rest still enforce, and
+    // the line that explains the darkness is the one a reader meets first.
     const findings = lintLivenessPropertiesFromLedgerDir(
       ledgerDirWith((dir) => rmSync(join(dir, 'object.json'))),
-      { agents: [{ name: 'ag1', memory: { kind: 'buffer' } }] },
+      { tools: [{ name: 't1', outputSchema: { type: 'object' } }] },
     );
     expect(findings.map((f) => f.rule)).toEqual([LIVENESS_LEDGER_UNREADABLE, LIVENESS_EXPERIMENTAL_PROPERTY]);
     expect(findings[0].where).toBe("liveness ledger 'object'");
 
@@ -2394,11 +2394,11 @@ export const enMetadataForms: NonNullable<TranslationData['metadataForms']> = {
       },
       planning: {
         label: "Planning",
-        helpText: "Autonomous reasoning configuration (strategy, max iterations, replan)"
+        helpText: "Autonomous reasoning configuration: the maximum number of reasoning iterations before the agent stops (1–100, default 10)."
       },
       memory: {
         label: "Memory",
-        helpText: "Memory management (short-term, long-term, reflection)"
+        helpText: "Long-term memory: distilled notes kept per user, recalled before each conversation and written by a reflection every reflectionInterval delivered interactions. When long-term memory is enabled, maxEntries and reflectionInterval are required. Enforced by the cloud AI runtime."
       },
       lifecycle: {
         label: "Lifecycle",
 
@@ -2394,11 +2394,11 @@ export const esESMetadataForms: NonNullable<TranslationData['metadataForms']> =
       },
       planning: {
         label: "Planificación",
-        helpText: "Configuración de razonamiento autónomo (strategy, max iterations, replan)"
+        helpText: "Configuración de razonamiento autónomo: el número máximo de iteraciones de razonamiento antes de que el agente se detenga (1–100, 10 por defecto)."
       },
       memory: {
         label: "Memoria",
-        helpText: "Gestión de memoria (short-term, long-term, reflection)"
+        helpText: "Memoria a largo plazo: notas destiladas que se guardan por usuario, se recuperan antes de cada conversación y las escribe una reflexión cada reflectionInterval interacciones entregadas. Cuando la memoria a largo plazo está habilitada, maxEntries y reflectionInterval son obligatorios. Lo aplica el runtime de IA en la nube."
       },
       lifecycle: {
         label: "Ciclo de vida",
 
@@ -2394,11 +2394,11 @@ export const jaJPMetadataForms: NonNullable<TranslationData['metadataForms']> =
       },
       planning: {
         label: "計画",
-        helpText: "自律推論設定（strategy, max iterations, replan）"
+        helpText: "自律推論設定: エージェントが停止するまでの最大推論反復回数（1〜100、既定値 10）。"
       },
       memory: {
         label: "メモリ",
-        helpText: "メモリ管理（short-term, long-term, reflection）"
+        helpText: "長期メモリ: ユーザーごとに保持される要約ノート。各会話の前に呼び出され、配信済みのやり取り reflectionInterval 回ごとに 1 回のリフレクションで書き込まれます。長期メモリを有効にする場合、maxEntries と reflectionInterval は必須です。クラウド AI ランタイムが適用します。"
       },
       lifecycle: {
         label: "ライフサイクル",
 
@@ -2394,11 +2394,11 @@ export const zhCNMetadataForms: NonNullable<TranslationData['metadataForms']> =
       },
       planning: {
         label: "规划",
-        helpText: "自主推理配置（策略、最大迭代、是否重规划）"
+        helpText: "自主推理配置：代理停止前的最大推理迭代次数（1–100，默认 10）。"
       },
       memory: {
         label: "记忆",
-        helpText: "记忆管理（短期、长期、反思）"
+        helpText: "长期记忆：按用户保存的提炼笔记，在每次会话前召回，并每隔 reflectionInterval 次已送达的交互由一次反思写入。启用长期记忆时，maxEntries 与 reflectionInterval 为必填。由云端 AI 运行时强制执行。"
       },
       lifecycle: {
         label: "生命周期",
 
@@ -3,13 +3,14 @@
   "measured": {
     "zod": "4.4.3",
     "publishedSchemasWithDroppedRefinements": 215,
-    "droppedRefinementSites": 635,
+    "droppedRefinementSites": 640,
     "refinementSitesThatDidProject": 369,
     "refinementSitesWithNoJsonFormToCompare": 0
   },
   "entries": {
     "ai/Agent": {
       "sites": [
+        "memory",
         "structuredOutput.schema"
       ]
     },
@@ -63,6 +64,7 @@
         "manifest.actions.element.in",
         "manifest.actions.element.in.ai.outputSchema",
         "manifest.actions.element.in.params.element.in",
+        "manifest.agents.element.memory",
         "manifest.agents.element.structuredOutput.schema",
         "manifest.connectors.element.out",
         "manifest.dashboards.element.globalFilters.element",
@@ -168,6 +170,7 @@
         "data.options[1].manifest.actions.element.in",
         "data.options[1].manifest.actions.element.in.ai.outputSchema",
         "data.options[1].manifest.actions.element.in.params.element.in",
+        "data.options[1].manifest.agents.element.memory",
         "data.options[1].manifest.agents.element.structuredOutput.schema",
         "data.options[1].manifest.connectors.element.out",
         "data.options[1].manifest.dashboards.element.globalFilters.element",
@@ -258,6 +261,7 @@
         "options[1].manifest.actions.element.in",
         "options[1].manifest.actions.element.in.ai.outputSchema",
         "options[1].manifest.actions.element.in.params.element.in",
+        "options[1].manifest.agents.element.memory",
         "options[1].manifest.agents.element.structuredOutput.schema",
         "options[1].manifest.connectors.element.out",
         "options[1].manifest.dashboards.element.globalFilters.element",
@@ -308,6 +312,7 @@
         "data.packages.element.options[1].manifest.actions.element.in",
         "data.packages.element.options[1].manifest.actions.element.in.ai.outputSchema",
         "data.packages.element.options[1].manifest.actions.element.in.params.element.in",
+        "data.packages.element.options[1].manifest.agents.element.memory",
         "data.packages.element.options[1].manifest.agents.element.structuredOutput.schema",
         "data.packages.element.options[1].manifest.connectors.element.out",
         "data.packages.element.options[1].manifest.dashboards.element.globalFilters.element",