@@ -0,0 +1,26 @@
+---
+"@objectstack/spec": minor
+"@objectstack/core": minor
+"@objectstack/lint": minor
+---
+
+A record-scoped filter token, `{record_id}`: the id of the record a `type: 'record'` page is showing. It resolves where a record is in context, and is refused by name everywhere else (#20003).
+
+On a record page, `record:related_list` was the only component that could scope itself to the record in view. Every other data-bearing component takes a `FilterCondition`, and the only dynamic values a filter could hold named the signed-in viewer. So "open tasks" on a person's record page counted the whole organisation's tasks, under that person's name. `{ assignee: '{record_id}' }` now says "this record's".
+
+**Where it is accepted, and where it is refused:**
+
+- **Accepted:** a filter on a component of a `type: 'record'` page (`regions[].components[]`, `slots`, and any filter key inside them). `os lint` / `os validate` pass it there. A page with no `type` is a record page by `PageSchema`'s default.
+- **Refused by `os lint` / `os validate`** (rule `filter-token-unknown`, `error`), with the reason "no record in context on this surface" rather than the unknown-token message: list views (top-level `views` and an object's list views and field filters), dashboard widgets and dashboard filters, reports, datasets, app navigation filters, and every page whose `type` is not `'record'` (`home`, `app`, `utility`, `list`, including a list page's `interfaceConfig.filterBy`).
+- **Refused on every server path.** `resolveFilterTokens()` in `@objectstack/core` throws `UnresolvedFilterTokenError` (`FILTER_TOKEN_UNRESOLVED` / 400, `token: 'record_id'`) on the ObjectQL read path (`find`, `findOne`, `count`, `aggregate`), the write path (`update` / `delete`, by id or `multi`), the analytics query door and the dataset executor. That is the same envelope a session token gets when the request has no value for it. It happens whatever the request carries, because no server path knows which record a page is showing. The token never becomes `null` (a count "about nobody"), is never dropped (a count "about everybody"), and never reaches the driver.
+
+**What is in `@objectstack/spec/data`:**
+
+- `RECORD_CONTEXT_TOKENS` (`['record_id']`), `RecordContextToken` and `isRecordContextToken()`: a sibling of `CONTEXT_TOKENS`, not a member. `CONTEXT_TOKENS` resolves against the caller's session, and `{record_id}` resolves against the surface. So `isContextToken('record_id')`, `ContextTokenSchema` and `ContextTokenPlaceholderSchema` are unchanged and still reject it, and a client resolver that fills `CONTEXT_TOKENS` from the session does not pick it up.
+- `classifyFilterToken('{record_id}')` returns the new kind `{ kind: 'record-context', token: 'record_id' }` instead of `unknown`. A consumer that switches exhaustively on `kind` gets a compile error until it handles the new kind.
+- `isKnownFilterToken('record_id')` stays `false`. That predicate answers "can the server resolve it?", and its one consumer, the flow engine's filter hand-off, is a server position. A flow addresses its own record as `{record.id}`.
+- Near misses are still refused, now with `{record_id}` suggested: `{recordId}` (the URL / flow-template placeholder), `{record.id}`, `{record-id}`, `{current_record_id}`. `CONTEXT_TOKEN_SUGGESTIONS`' value type widens to `ContextToken | RecordContextToken`.
+
+**Presentation scope, not access.** Like `{current_user_id}`, `{record_id}` narrows what a component shows. It decides nothing about which rows the caller may read; that is still RLS.
+
+**What you do:** on a record page, filter a component on the record in view with `{ <field>: '{record_id}' }`. If `os validate` refuses it with "no record in context on this surface", the filter is on a surface with no record: move it onto a component of a `type: 'record'` page, or filter on a concrete id. Until the renderer you run resolves `{record_id}`, a record-page query that carries it is refused by the server with `FILTER_TOKEN_UNRESOLVED` rather than answered with a wrong number.
@@ -6,7 +6,18 @@ description: Context Tokens protocol schemas
 {/* ⚠️  AUTO-GENERATED — DO NOT EDIT. Run build-docs.ts to regenerate. Hand-written docs live in the module folders under content/docs/. */}
 
 Context Tokens — the declarative placeholders that resolve against the
-**caller's session** (who am I, which org am I in) rather than the clock.
+**caller's session** (who am I, which org am I in) rather than the clock,
+plus one sibling that resolves against the **surface**: `{record_id}`, the
+record a `type: 'record'` page is showing.
+
+The two resolve against different things, so they are two lists, never one:
+
+| | `CONTEXT_TOKENS` | `RECORD_CONTEXT_TOKENS` |
+|---|---|---|
+| Tokens | `{current_user_id}`, `{current_org_id}` | `{record_id}` |
+| Resolves against | the caller's session | the record the page is bound to |
+| Known on the server | yes — `ExecutionContext` | never — only the page renderer knows which record is in view |
+| Valid on | every filter surface | a component on a `type: 'record'` page, and nowhere else |
 
 ## Why this lives in `spec`
 
@@ -38,11 +49,24 @@ neither is an ERROR, not a null comparand: resolving to `null`
 degrades to `IS NULL` on most drivers and would hand back the rows
 the filter was written to exclude.
 
+`{record_id}` is resolved on ONE side of the wire only: by the page
+renderer, which substitutes the id of the record a `type: 'record'` page
+is showing before the filter leaves the browser. The server never knows
+which record a page is showing, so a filter that reaches
+`resolveFilterTokens()` still carrying `{record_id}` is refused by name
+(`FILTER_TOKEN_UNRESOLVED` / 400) — which is also what an author sees
+from a renderer that does not resolve the token yet. It never becomes
+`null`, `undefined` or the literal string: a number written as "about
+this record" must neither silently become "about everybody" (the
+condition dropped) nor "about nobody" (the token compared as text).
+
 ## Presentation scope, NOT a security boundary
 
 This is the single most important thing to understand about these
 tokens. `{current_user_id}` scopes what a surface *shows*; it does not
-decide what a caller is *allowed* to read. Enforcement is RLS, which
+decide what a caller is *allowed* to read. `{record_id}` is the same: it
+narrows a record-page component to the record in view, and which of those
+rows the caller may read is still not its decision. Enforcement is RLS, which
 uses a different and genuinely server-side vocabulary rooted at
 `current_user` (`owner_id = current_user.id`, compiled by
 `@objectstack/plugin-security`'s RLS compiler).
@@ -62,19 +86,48 @@ a `{current_user_id}` filter widens a *view*; it must never widen
 
 ## Where the tokens are honoured
 
-Filter values on every surface that resolves placeholders — object list
-views, dashboard widgets, reports, SDUI page components. Navigation
-(`recordId` / `params`) additionally resolves `AppContextSelector` ids
-such as `{active_package}`; those are nav-only and are NOT valid inside
-filter values, because filters are not evaluated with the sidebar's
-selector state.
+`{current_user_id}` and `{current_org_id}`: filter values on every surface
+that resolves placeholders — object list views, dashboard widgets,
+reports, datasets, SDUI page components — and on the server's ObjectQL
+read and write paths and analytics doors.
+
+`{record_id}`: filter values on a component of a `type: 'record'` page,
+and nowhere else. `@objectstack/lint`'s `validate-filter-tokens` refuses it
+by name ("no record in context on this surface") on list views, dashboard
+widgets, reports, datasets, apps, object definitions and every page that is
+not `type: 'record'`. The server refuses it on every path, because no
+server path has a record in context.
+
+Navigation (`recordId` / `params`) additionally resolves
+`AppContextSelector` ids such as `{active_package}`; those are nav-only and
+are NOT valid inside filter values, because filters are not evaluated with
+the sidebar's selector state.
+
+## `{record_id}` is not `{recordId}`, and not the `'record_id'` variable type
+
+Three spellings look alike and are three different mechanisms:
+
+- `{record_id}` — this filter token. A whole filter VALUE, resolved to the
+  id of the record the page shows.
+- `{recordId}` — a URL / flow-template placeholder: an action's
+  `newTabUrl` (`action.zod.ts`) and the flow template dialect
+  (`@objectstack/lint`'s `flow-template-grammar.ts`). It is interpolated by
+  those surfaces' own template engines and is NOT a filter token. Written
+  inside a filter it is refused, with `{record_id}` suggested.
+- `'record_id'` — a page-variable TYPE (`PageVariableSchema.type` in
+  `page.zod.ts`), naming what a page variable holds, e.g. the selection of
+  an `element:record_picker`. It is read in expressions as `page.<name>`,
+  never written as a placeholder.
 
 ## Out of scope
 
 - `current_user.*` RLS expressions — see `@objectstack/plugin-security`.
 - `{date-macros}` — the clock-based sibling; see `./date-macros.zod.ts`.
 - `titleFormat` field interpolation (`{user_id}` etc.) — that substitutes
   *record fields*, an unrelated mechanism that happens to share braces.
+- Tokens for a record OTHER than the one in view (a related record, a
+  parent of the record). Each is its own contract with its own resolver,
+  not an extension of `{record_id}`.
 
 <Callout type="info">
 **Source:** `packages/spec/src/data/context-tokens.zod.ts`
 
@@ -145,6 +145,72 @@ describe('resolveFilterToken — context tokens', () => {
   });
 });
 
+/**
+ * `{record_id}` — the record-context token. The server never has a record in
+ * context, so it refuses by name on every path, whatever the request carries.
+ * The refusal is the same envelope as a session token the request has no value
+ * for (`FILTER_TOKEN_UNRESOLVED` / 400): the spelling is right, the context is
+ * missing, and `token` names which context.
+ */
+describe('resolveFilterTokens — the record-context token refuses by name', () => {
+  // A FULL context on purpose: the refusal must not depend on what the
+  // request happens to carry.
+  const full = { now: NOW, userId: 'usr_1', orgId: 'org_9', timezone: 'UTC' };
+
+  function refusal(filter: unknown): UnresolvedFilterTokenError {
+    let err: unknown;
+    try {
+      resolveFilterTokens(filter, full);
+    } catch (e) {
+      err = e;
+    }
+    expect(err).toBeInstanceOf(UnresolvedFilterTokenError);
+    return err as UnresolvedFilterTokenError;
+  }
+
+  it.each([
+    ['a MongoDB-style condition', { assignee: '{record_id}' }],
+    ['an operator comparand', { assignee: { $eq: '{record_id}' } }],
+    ['the `${…}` spelling', { assignee: '${record_id}' }],
+    ['a rule-array filter', [{ field: 'assignee', operator: 'equals', value: '{record_id}' }]],
+    ['a logical branch beside a resolvable token', { $and: [{ owner: '{current_user_id}' }, { account: '{record_id}' }] }],
+  ])('%s: FILTER_TOKEN_UNRESOLVED / 400, the token named', (_label, filter) => {
+    const err = refusal(filter);
+    expect(err.code).toBe('FILTER_TOKEN_UNRESOLVED');
+    expect(err.status).toBe(400);
+    expect(err.name).toBe('UnresolvedFilterTokenError');
+    expect(err.token).toBe('record_id');
+    expect(err.message).toContain('{record_id}');
+  });
+
+  it('resolveFilterToken refuses it directly too — never `undefined`, never the literal', () => {
+    expect(() => resolveFilterToken('record_id', full)).toThrow(UnresolvedFilterTokenError);
+  });
+
+  it('lit control — a session token in the same request still resolves', () => {
+    expect(resolveFilterTokens({ owner: '{current_user_id}' }, full)).toEqual({ owner: 'usr_1' });
+  });
+
+  it.each([
+    ['{recordid}', 'recordid'],
+    ['{record-id}', 'record-id'],
+    ['{recordId}', 'recordId'],
+  ])('near miss %s stays FILTER_TOKEN_UNKNOWN, with {record_id} suggested', (value, token) => {
+    let err: unknown;
+    try {
+      resolveFilterTokens({ assignee: value }, full);
+    } catch (e) {
+      err = e;
+    }
+    expect(err).toBeInstanceOf(UnknownFilterTokenError);
+    const e = err as UnknownFilterTokenError;
+    expect(e.code).toBe('FILTER_TOKEN_UNKNOWN');
+    expect(e.status).toBe(400);
+    expect(e.token).toBe(token);
+    expect(e.suggestion).toBe('record_id');
+  });
+});
+
 describe('resolveFilterTokens — tree walk', () => {
   const ctx = { now: NOW, userId: 'usr_1', orgId: 'org_9' };
 
 
@@ -72,10 +72,22 @@
  * natural-language spellings are exactly what an author migrating from another
  * system's macro syntax reaches for first. See `FILTER_TOKEN_WRAPPED_RE` in
  * `@objectstack/spec`.
+ *
+ * # A record-context token always refuses here
+ *
+ * `{record_id}` (`RECORD_CONTEXT_TOKENS` in `@objectstack/spec`) is the id of
+ * the record a `type: 'record'` page is showing. Only the page renderer knows
+ * that record; no server path has one in context. So a filter that arrives
+ * here still carrying `{record_id}` throws {@link UnresolvedFilterTokenError}
+ * naming it, on every path, whatever the request carries. It never resolves
+ * to `null`, `undefined` or the literal: a count written as "about this
+ * record" would otherwise come back as "about nobody", or, with the condition
+ * gone, "about everybody".
  */
 
 import {
   classifyFilterToken,
+  isRecordContextToken,
   parseDateMacroParam,
   type DateMacroUnit,
 } from '@objectstack/spec/data';
@@ -143,10 +155,15 @@ export class UnknownFilterTokenError extends Error {
 
 /**
  * Raised when a token IS in the vocabulary but the request carries no value
- * for it — an unauthenticated caller filtering on `{current_user_id}`.
+ * for it — an unauthenticated caller filtering on `{current_user_id}`, or any
+ * filter carrying the record-context token `{record_id}`, which no server
+ * path has a value for (see the module doc).
  *
  * Distinct from {@link UnknownFilterTokenError} because the fix is different:
- * the metadata is correct, the context is not. Never silently resolves to
+ * the spelling is correct, the context is not. For `{record_id}` the fix is
+ * WHERE the filter is authored or resolved: a component on a `type: 'record'`
+ * page, whose renderer resolves the token before the query leaves the
+ * browser. `token` names which context is missing. Never silently resolves to
  * `null`/`undefined`, which on most drivers degrades to `IS NULL` and would
  * quietly hand back rows the filter was written to exclude.
  */
@@ -320,6 +337,23 @@ export function resolveFilterToken(
     return ctx.orgId;
   }
 
+  // ── Record-context tokens ─────────────────────────────────────────────
+  // Never resolvable here, whatever the request carries: the server does not
+  // know which record a page is showing. See the module doc.
+  if (isRecordContextToken(token)) {
+    throw new UnresolvedFilterTokenError(
+      token,
+      'no record in context on the server. {record_id} is the id of the record a ' +
+      "`type: 'record'` page is showing, and only that page's renderer knows it: it " +
+      'resolves the token before the query leaves the browser. A filter still carrying ' +
+      'it here was authored on a surface with no record in context (a list view, a ' +
+      'dashboard widget, a report, a dataset, a page that is not a record page), or sent ' +
+      'by a client that did not resolve it. Move the filter onto a component of a record ' +
+      'page, or filter on a concrete id. Resolving it to null would count no records, and ' +
+      'dropping the condition would count them all.',
+    );
+  }
+
   // ── Date macros ───────────────────────────────────────────────────────
   const today = proxyDay(now, ctx.timezone);