feat(design): offer starter token ROLES at creation, never values

A literal gets written into a stylesheet when there is no role to reach for.
This codebase demonstrated it: the house style had no "text on a filled colour"
role, so 76 call sites wrote a pure-white literal — not out of defiance, but
because nothing existed to write instead. The correction was not a better ban
list; it was declaring the missing role (#2275, #2349).

So the useful moment is creation. A system whose roles are named on day one
never presents the occasion.

Ten groups, ~40 roles: surface, text, action, semantic, border, accent, radius,
space, motion, state. Operator's call was one flat list, every group
individually skippable — presets keyed to app shape (web / CLI / docs) were
rejected because they need the product to hold opinions about app categories,
and a wrong category is worse than a list someone prunes once.

TWO BOUNDARIES THIS HAS TO HOLD, both rule #115:

- The ROLES ship; the VALUES never do. Every seeded token has an empty
  value_by_mode, so a fresh system is a set of named, deliberately-unanswered
  questions. A test asserts no hex appears anywhere in the module — not just
  that tokens are blank, but that no palette hides in a comment waiting to be
  pasted in.
- The PREFIX is the install's. `--fs-` is FabledSword's convention, not the
  product's; the default is a neutral `--ds-` and callers pass their own.

Valueless roles are already legible downstream — render_stylesheet emits them
as commented-out declarations and stylesheet_for_system reports them under
`valueless` (#2299) — so "declared but undecided" reads correctly with nothing
new built.

Both surfaces, per rule #33: MCP gains starter_role_groups/token_prefix plus
list_starter_role_groups(); REST gains the same on POST plus
GET /api/design-systems/starter-roles. The parity enumeration is extended
rather than loosened.

Note create_design_system treats None and [] alike (seed nothing), while
starter_tokens treats None as "all". Deliberate: creation must never write 40
rows into a system whose caller never asked, and the everything-checked default
belongs in the UI where the operator can see it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UaYUaouG9jjhATyuxCKrQs

src/scribe/mcp/tools/design_systems.py

@@ -22,6 +22,11 @@ from __future__ import annotations
 from scribe.mcp._context import current_user_id
 from scribe.services import design_systems as ds_svc
 from scribe.services.design_systems import DesignSystemCycle
+from scribe.services.design_starter_roles import (
+    ALL_GROUPS,
+    DEFAULT_TOKEN_PREFIX,
+    describe_groups,
+)
 
 
 async def create_design_system(
@@ -29,6 +34,8 @@ async def create_design_system(
     description: str = "",
     guidance: str = "",
     parent_id: int = 0,
+    starter_role_groups: list[str] | None = None,
+    token_prefix: str = "",
 ) -> dict:
     """Create a design system, optionally inheriting from another.
 
@@ -41,20 +48,47 @@ async def create_design_system(
         parent_id: Inherit from this system — it holds the defaults this one
             overrides. Omit (0) for a top-level "family" system, which is what
             a first design system usually is.
+        starter_role_groups: Seed the system with named but VALUELESS token
+            roles, so there is something to reach for before a literal gets
+            written instead. Call list_starter_role_groups() for the catalogue.
+            Pass ["all"] for every group. Omit for none — a system with three
+            hand-written tokens is a legitimate design system.
+        token_prefix: Naming convention for the seeded roles, e.g. "--fs-".
+            Defaults to a neutral "--ds-"; pass the install's own if it has one.
+            Ignored when no starter groups are requested.
     """
     uid = current_user_id()
+    groups = starter_role_groups
+    if groups and len(groups) == 1 and groups[0] == "all":
+        groups = list(ALL_GROUPS)
     system = await ds_svc.create_design_system(
         uid,
         title=title,
         description=description or None,
         guidance=guidance or None,
         parent_id=parent_id or None,
+        starter_role_groups=groups,
+        token_prefix=token_prefix or DEFAULT_TOKEN_PREFIX,
     )
     if system is None:
         raise ValueError(f"parent design system {parent_id} not found or not writable")
     return system.to_dict()
 
 
+async def list_starter_role_groups() -> dict:
+    """The starter token ROLES offered at design-system creation.
+
+    Roles, not values. Every group is a set of named questions — "page
+    background, the deepest surface" — that the operator answers with their own
+    palette. Nothing here carries a colour, because a default palette would be
+    one install's taste shipped as product.
+
+    Reach for this before create_design_system so the choice is informed, and
+    pass the group names you want as `starter_role_groups`.
+    """
+    return {"groups": describe_groups(), "default_prefix": DEFAULT_TOKEN_PREFIX}
+
+
 async def list_design_systems() -> dict:
     """List your design systems. An empty list is normal — most installs have none."""
     uid = current_user_id()
@@ -350,6 +384,7 @@ async def set_project_design_system(project_id: int, design_system_id: int = 0)
 def register(mcp) -> None:
     for fn in (
         create_design_system,
+        list_starter_role_groups,
         list_design_systems,
         get_design_system,
         resolve_design_system,

src/scribe/routes/design_systems.py

@@ -19,6 +19,10 @@ from quart import Blueprint, g, jsonify, request
 
 from scribe.auth import login_required
 from scribe.services import design_systems as ds_svc
+from scribe.services.design_starter_roles import (
+    DEFAULT_TOKEN_PREFIX,
+    describe_groups,
+)
 from scribe.services.design_systems import DesignSystemCycle
 
 design_systems_bp = Blueprint("design_systems", __name__, url_prefix="/api")
@@ -56,12 +60,27 @@ async def create_design_system():
         description=data.get("description") or None,
         guidance=data.get("guidance") or None,
         parent_id=data.get("parent_id"),
+        starter_role_groups=data.get("starter_role_groups"),
+        token_prefix=data.get("token_prefix") or DEFAULT_TOKEN_PREFIX,
     )
     if system is None:
         return jsonify({"error": "parent design system not found"}), 404
     return jsonify(system.to_dict()), 201
 
 
+@design_systems_bp.get("/design-systems/starter-roles")
+@login_required
+async def list_starter_role_groups():
+    """The starter role catalogue, for the creation form's checklist.
+
+    Roles and purposes only — no values, ever. See services/design_starter_roles.
+    """
+    return jsonify({
+        "groups": describe_groups(),
+        "default_prefix": DEFAULT_TOKEN_PREFIX,
+    })
+
+
 @design_systems_bp.get("/design-systems/<int:design_system_id>")
 @login_required
 async def get_design_system(design_system_id: int):

src/scribe/services/design_starter_roles.py

@@ -0,0 +1,185 @@
+"""A starter set of token ROLES, offered when a design system is created.
+
+WHY THIS EXISTS
+---------------
+A literal gets written into a stylesheet when there is no role to reach for.
+That is the mechanism, and this codebase produced a clean demonstration of it:
+the house style had no "text on a filled colour" role, so 76 call sites wrote
+a pure-white literal — not out of defiance, but because nothing existed to write
+instead (#2275). The correction was not a better ban list. It was declaring the
+missing role.
+
+So the useful moment is CREATION. A system whose roles are named on day one
+never presents the occasion for a literal, and never needs a list of values it
+forbids.
+
+WHAT SHIPS AND WHAT DOES NOT (rule #115)
+----------------------------------------
+The ROLES ship: `surface-page`, `text-primary`, `action-destructive` are
+generic CSS-design vocabulary, not one operator's kit. Every install that has a
+page has a page background.
+
+The VALUES never ship. Each token is created with an empty `value_by_mode`, so
+a fresh system is a set of named, deliberately-unanswered questions. No hex
+appears anywhere in this file, and none should ever be added to it — a default
+palette would be this operator's palette wearing product clothes.
+
+A valueless token is already legible downstream: `render_stylesheet` emits it as
+a commented-out declaration in its group (#2299), and `stylesheet_for_system`
+reports it under `valueless`. So a blank role reads as "to be decided" rather
+than as breakage, without anything new.
+
+THE PREFIX IS THE INSTALL'S
+---------------------------
+`--fs-` is FabledSword's convention, not the product's. The prefix is a
+parameter with a neutral default; a caller that has a house convention passes
+it. Baking `--fs-` in would put one family's naming into every install.
+
+FLAT, NOT PRESET
+----------------
+One list, every group individually skippable, all on by default (operator's
+call, 2026-08-03). Presets keyed to app shape — web / CLI / docs — were
+considered and rejected: they would require the product to hold opinions about
+app categories, and a wrong category is worse than a generic list someone
+prunes once.
+"""
+from __future__ import annotations
+
+DEFAULT_TOKEN_PREFIX = "--ds-"
+
+# group -> (what the group is for, ((role suffix, purpose), ...))
+#
+# Purposes are written as the QUESTION the operator is answering, because that
+# is what an unfilled role is. "Page background, the deepest surface" tells you
+# what to put there; "Colour 1" does not.
+STARTER_ROLE_GROUPS: dict[str, tuple[str, tuple[tuple[str, str], ...]]] = {
+    "surface": (
+        "Backgrounds, by elevation",
+        (
+            ("surface-page", "Page background, the deepest surface"),
+            ("surface-raised", "Cards and raised elements"),
+            ("surface-hover", "Hovered surfaces, secondary elevation"),
+        ),
+    ),
+    "text": (
+        "Foreground colours, by emphasis",
+        (
+            ("text-primary", "Primary text on a page or raised surface"),
+            ("text-secondary", "Secondary text and captions"),
+            ("text-tertiary", "Hints and metadata"),
+            # The role whose absence caused 76 literals. It is in the starter
+            # set deliberately: text on a filled colour is NOT the page text
+            # colour, because the surface under it does not change with the
+            # mode while the page does.
+            ("text-on-action", "Text on a filled colour — buttons, badges"),
+        ),
+    ),
+    "action": (
+        "What the user can do — kept separate from the accent, which is identity",
+        (
+            ("action-primary", "The confirming action: Save, Submit"),
+            ("action-secondary", "Non-destructive alternates"),
+            ("action-destructive", "Irreversible actions — delete, revoke"),
+        ),
+    ),
+    "semantic": (
+        "What the system is telling you",
+        (
+            ("success", "Something worked"),
+            ("warning", "Something needs attention"),
+            ("error", "Something failed — distinct from destructive"),
+            ("info", "Neutral information"),
+        ),
+    ),
+    "border": (
+        "Boundaries and dividers",
+        (
+            ("border-color", "The line colour itself"),
+            ("border", "The default structural border, as a shorthand"),
+            ("border-hover", "Border on hover or emphasis"),
+            ("border-active", "Selected or current — the one border that may carry the accent"),
+        ),
+    ),
+    "accent": (
+        "This install's identity — not its actions",
+        (
+            ("accent", "The single signature colour"),
+            ("accent-soft", "Tinted backgrounds — pills, tags"),
+            ("accent-faint", "The faintest wash"),
+        ),
+    ),
+    "radius": (
+        "Corner rounding",
+        (
+            ("radius-sm", "Pills, tags, code spans"),
+            ("radius-md", "Buttons, inputs, small cards"),
+            ("radius-lg", "Cards, panels, modals"),
+        ),
+    ),
+    "space": (
+        "The spacing scale — a gap not on the scale is a decision to justify",
+        tuple((f"space-{i}", f"Spacing step {i}") for i in range(1, 11)),
+    ),
+    "motion": (
+        "Transition timing — motion supports the interaction, never performs",
+        (
+            ("ease", "The one easing curve, used by every transition"),
+            ("dur-fast", "Hovers, colour and border changes"),
+            ("dur-base", "Most state changes"),
+            ("dur-slow", "Larger surface or layout shifts"),
+        ),
+    ),
+    "state": (
+        "Cross-cutting states that are otherwise improvised per view",
+        (
+            ("disabled-opacity", "Opacity for disabled controls"),
+            ("overlay", "Scrim behind modals and dialogs"),
+        ),
+    ),
+}
+
+ALL_GROUPS: tuple[str, ...] = tuple(STARTER_ROLE_GROUPS)
+
+
+def starter_tokens(
+    groups: list[str] | tuple[str, ...] | None = None,
+    prefix: str = DEFAULT_TOKEN_PREFIX,
+) -> list[dict]:
+    """Token rows for the chosen groups — names and purposes only, no values.
+
+    `groups` of None means every group; an empty list means none, which is a
+    real answer and not the same as None. An operator who wants three tokens
+    should be able to get three.
+
+    Unknown group names are ignored rather than raising: this feeds a
+    checkbox list, and a stale name from an older client should not fail a
+    creation that is otherwise fine.
+    """
+    chosen = ALL_GROUPS if groups is None else [g for g in groups if g in STARTER_ROLE_GROUPS]
+    rows: list[dict] = []
+    for group in chosen:
+        _, roles = STARTER_ROLE_GROUPS[group]
+        for index, (suffix, purpose) in enumerate(roles, start=1):
+            rows.append({
+                "name": f"{prefix}{suffix}",
+                "group_name": group,
+                "purpose": purpose,
+                # Empty, not absent: the column is NOT NULL with a {} default,
+                # so absence has exactly one spelling here as it does there.
+                "value_by_mode": {},
+                "order_index": index,
+            })
+    return rows
+
+
+def describe_groups() -> list[dict]:
+    """The catalogue, for a UI to render as a checklist."""
+    return [
+        {
+            "group": group,
+            "description": description,
+            "token_count": len(roles),
+            "names": [suffix for suffix, _ in roles],
+        }
+        for group, (description, roles) in STARTER_ROLE_GROUPS.items()
+    ]

src/scribe/services/design_systems.py

@@ -27,6 +27,10 @@ from scribe.services.design_stylesheet import (
     duplicate_values,
     render_stylesheet,
 )
+from scribe.services.design_starter_roles import (
+    DEFAULT_TOKEN_PREFIX,
+    starter_tokens,
+)
 from scribe.services.design_cascade import (
     ResolvedToken,
     ancestry,
@@ -79,11 +83,23 @@ async def create_design_system(
     description: str | None = None,
     guidance: str | None = None,
     parent_id: int | None = None,
+    starter_role_groups: list[str] | None = None,
+    token_prefix: str = DEFAULT_TOKEN_PREFIX,
 ) -> DesignSystem | None:
     """Create a system, with or without a parent.
 
     Returns None when `parent_id` names a system the caller may not write —
     which, per the ACL, means one they do not own.
+
+    `starter_role_groups` seeds the system with named, VALUELESS token roles
+    (#2349) — the moment a role is missing is the moment a literal gets written
+    instead, so the cheapest time to name them is now. Pass a list of group
+    names to choose, `[]` for none, or None for none.
+
+    None and `[]` deliberately mean the same thing here, unlike in
+    `starter_tokens` where None means "all": creation must not seed 40 rows
+    into a system whose caller never asked. Opting in is the caller's job, and
+    the UI's default of everything-checked lives in the UI.
     """
     if parent_id is not None and not await access.can_write_design_system(
         user_id, parent_id
@@ -100,6 +116,11 @@ async def create_design_system(
         session.add(system)
         await session.commit()
         await session.refresh(system)
+
+        if starter_role_groups:
+            for row in starter_tokens(starter_role_groups, prefix=token_prefix):
+                session.add(DesignToken(design_system_id=system.id, **row))
+            await session.commit()
         return system