docs(23): UI design contract for brainstormer-flow phase

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-04-01 21:21:04 +00:00 · 2026-04-01 21:21:04 +00:00 · fe61a0bc09
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+---
+phase: 23
+slug: brainstormer-flow
+status: draft
+shadcn_initialized: true
+preset: new-york / neutral / css-variables
+created: 2026-04-01
+---
+
+# Phase 23 — UI Design Contract
+
+> Visual and interaction contract for Phase 23: Brainstormer Flow.
+> Generated by gsd-ui-researcher. Verified by gsd-ui-checker.
+
+---
+
+## Design System
+
+| Property | Value | Source |
+|----------|-------|--------|
+| Tool | shadcn/ui | `ui/components.json` — unchanged from Phase 21/22 |
+| Style | new-york | `ui/components.json` |
+| Base color | neutral | `ui/components.json` |
+| CSS variables | true | `ui/components.json` |
+| Component library | Radix UI (via shadcn new-york) | `ui/components.json` |
+| Icon library | lucide-react ^0.574.0 | `ui/components.json` |
+| Font | System UI (`font-sans`, inherited) | `ui/src/index.css` |
+
+**Existing shadcn components available (no install needed):**
+`avatar`, `badge`, `button`, `card`, `checkbox`, `collapsible`, `command`, `dialog`, `dropdown-menu`, `input`, `label`, `popover`, `scroll-area`, `select`, `separator`, `sheet`, `skeleton`, `tabs`, `textarea`, `tooltip`
+
+**Existing custom components to reuse/extend:**
+- `ChatMessage.tsx` — extend with `role === "system"` rendering branch for handoff/spec/status-update messages
+- `ChatPanel.tsx` — extend with Brainstormer default agent selection on new conversation
+- `AgentIcon` (from `AgentIconPicker.tsx`) — used for Brainstormer identity in all message identity bars
+- `agentRoleColors` (from `agent-role-colors.ts`) — `general` role maps to `text-slate-600 dark:text-slate-400` for Brainstormer avatar
+- `issuesApi` — referenced from `ui/src/api/issues` for task creation link-out
+
+**New DB migration required:**
+- Add `message_type` column to `chat_messages` table: `text("message_type")` — values: `null` (normal), `"handoff"`, `"spec_card"`, `"task_created"`, `"status_update"`. Used by Phase 23 system message rendering to determine which specialized card to display.
+
+---
+
+## Layout Contract
+
+### Layout Unchanged
+
+The overall layout established in Phase 21 and unmodified in Phase 22 remains:
+
+```
+[ CompanyRail ] [ Sidebar ] [ <main> ] [ ChatPanel ] [ PropertiesPanel ]
+```
+
+Phase 23 adds new UI surfaces **inside** `ChatPanel` and `ChatMessageList` only. No layout-level changes.
+
+### Default Brainstormer Selection (AGENT-01)
+
+When the user opens a **new conversation** (no prior messages), the `ChatPanel` auto-selects the workspace agent with `role === "general"` as the default. The `ChatAgentSelector` renders this agent immediately without user action.
+
+**Selection precedence:**
+1. If a `general` role agent exists in the workspace — select it
+2. If multiple `general` agents exist — select the first by `createdAt` ascending
+3. If no `general` agent exists — fall back to the first agent alphabetically (same as current behavior)
+4. Auto-selection fires only when `activeAgentId === null` and the conversation has zero messages
+
+The auto-selected agent is visually indistinguishable from a manually selected agent — the `ChatAgentSelector` shows its icon + name normally.
+
+### Spec Card Layout (AGENT-02)
+
+When the Brainstormer completes its questioning flow, it emits a **spec card** as a `system` role message with `message_type: "spec_card"`. The `ChatMessage` component renders a `ChatSpecCard` instead of a markdown message.
+
+```
+┌─────────────────────────────────────────────┐
+│  [Brain icon]  Brainstormer — Spec Ready     │  ← identity bar (standard)
+├─────────────────────────────────────────────┤
+│  What: {what field text}                     │
+│  Why: {why field text}                       │
+│  Constraints: {constraints field text}       │
+│  Success: {success field text}               │
+├─────────────────────────────────────────────┤
+│  [ Send to PM ]  [ Edit ]  [ Save as Draft ] │  ← action row
+└─────────────────────────────────────────────┘
+```
+
+- Container: `rounded-lg border border-border bg-card p-4 max-w-[480px]` — uses `bg-card` (secondary 30% surface) to visually distinguish spec from normal prose
+- Section labels ("What", "Why", "Constraints", "Success"): `text-[11px] font-semibold uppercase tracking-wide text-muted-foreground` — same weight/size pattern as Phase 22 timestamps
+- Section content: `text-[15px] font-normal text-foreground leading-relaxed` — standard body
+- Vertical rhythm between sections: `space-y-3` (12px gaps)
+- Action row: `flex gap-2 pt-3 border-t border-border mt-3` — separated from content with a border
+- "Send to PM" button: `variant="default" size="sm"` — primary action
+- "Edit" button: `variant="outline" size="sm"` — secondary action
+- "Save as Draft" button: `variant="ghost" size="sm"` — tertiary action
+
+### Handoff Indicator Layout (AGENT-05, CHAT-09)
+
+When the user clicks "Send to PM", a **handoff message** is inserted as a `system` role message with `message_type: "handoff"`. The `ChatMessage` component renders a `ChatHandoffIndicator`.
+
+```
+┌───────────────────────────────────────────────┐
+│  ──  Brainstormer → PM: spec handed off  ──   │  ← separator-style indicator
+└───────────────────────────────────────────────┘
+```
+
+- Container: `flex items-center gap-3 py-2 text-[13px] text-muted-foreground`
+- Left and right: `<hr className="flex-1 border-border" />` — lines flanking the label
+- Center label: `whitespace-nowrap` — "Brainstormer → PM" + brief description (see Copywriting)
+- Arrow character: `→` unicode, not a Lucide icon — matches the simple prose style
+- No background, no border-radius — this is a separator, not a card
+
+### Task Created Notification Layout (AGENT-03, AGENT-06)
+
+When the PM agent creates Nexus issues from the spec, a `system` role message with `message_type: "task_created"` appears. The `ChatMessage` component renders a `ChatTaskCreatedBadge`.
+
+```
+[ #123  Issue title text  →  View task ]
+```
+
+- Container: `inline-flex items-center gap-2 rounded-md border border-border bg-card px-3 py-1.5 text-[13px]`
+- Issue ID badge: `text-[11px] font-semibold text-muted-foreground` — e.g. "T-123"
+- Issue title: `text-[13px] text-foreground`
+- "View task" link: `text-primary underline-offset-2 hover:underline` — navigates to the issue detail page
+- Multiple tasks from one spec: render one `ChatTaskCreatedBadge` per task, stacked vertically with `gap-2` wrapper
+
+### Status Update Notification Layout (AGENT-07)
+
+When an Engineer or Generalist completes a task, a `system` role message with `message_type: "status_update"` appears. The `ChatMessage` component renders a `ChatStatusUpdateBadge`.
+
+```
+[ ✓  Engineer completed T-123: Issue title ]
+```
+
+- Container: `inline-flex items-center gap-2 rounded-md border border-border bg-card px-3 py-1.5 text-[13px]`
+- Icon: `CheckCircle2` (lucide), 14×14px, `text-green-500 dark:text-green-400` — indicates completion
+- Text: `text-[13px] text-foreground` — agent name + action + task reference
+- Task reference: `text-primary underline-offset-2 hover:underline` — link to issue detail
+
+---
+
+## Spacing Scale
+
+Inherited from Phase 21 and Phase 22. No new tokens for Phase 23.
+
+| Token | Value | Phase 23 Usage |
+|-------|-------|----------------|
+| xs | 4px | Section label letter-spacing, gap within inline badges |
+| sm | 8px | Action button gap in spec card row (`gap-2`), badge padding |
+| md | 16px | Spec card padding (`p-4`) |
+| lg | 24px | (no new usage) |
+| xl | 32px | (no new usage) |
+
+**New spacing values (Phase 23 only):**
+- Spec card section vertical rhythm: `space-y-3` (12px) — between What/Why/Constraints/Success blocks
+- Spec card action row top: `pt-3` (12px) — from content to action row border
+- Task badge height: `py-1.5` (6px top/bottom) — compact inline badge
+- Handoff indicator vertical: `py-2` (8px) — matches section separator rhythm
+
+---
+
+## Typography
+
+All inherited from Phase 21 and 22. No new type tokens for Phase 23.
+
+| Role | Size | Weight | Line Height | Usage |
+|------|------|--------|-------------|-------|
+| Body / message text | 15px (0.9375rem) | 400 | 1.6 | Spec card content, chat message prose (unchanged) |
+| Label / UI chrome | 13px (0.8125rem) | 400 | 1.4 | Task badge text, handoff indicator label, agent selector (unchanged) |
+| Spec section label | 11px (0.6875rem) | 600 | 1.4 | "What", "Why", "Constraints", "Success" labels in spec card |
+| Message timestamp | 11px (0.6875rem) | 400 | 1.4 | Identity bar timestamps (Phase 22, unchanged) |
+
+**Weights used:** 400 (regular) and 600 (semibold). No additional weights. Same constraint as Phase 21/22.
+
+**Spec section label note:** The 11px / 600 uppercase-tracked label pattern matches the existing `text-[11px] text-muted-foreground` timestamp pattern from Phase 22. The semibold weight at 11px + `uppercase tracking-wide` provides adequate differentiation from surrounding 15px prose. No new weight is introduced.
+
+---
+
+## Color
+
+All values inherited from Phase 21 CSS variable system. No new color variables introduced.
+
+| Role | Catppuccin Mocha | Tokyo Night | Catppuccin Latte | Phase 23 Usage |
+|------|-----------------|-------------|-----------------|----------------|
+| Dominant (60%) | `--background` #1e1e2e | `--background` #1a1b26 | `--background` #eff1f5 | Unchanged |
+| Secondary (30%) | `--card` #181825 | `--card` #16161e | `--card` #e6e9ef | Spec card background, task badge background, status badge background |
+| Accent (10%) | `--accent` #45475a | `--accent` #3b4261 | `--accent` #bcc0cc | Hovered rows (unchanged) |
+| Primary | `--primary` | `--primary` | `--primary` | "Send to PM" button, task/status reference links |
+| Destructive | `--destructive` | `--destructive` | `--destructive` | Not used in Phase 23 |
+| Muted text | `--muted-foreground` | `--muted-foreground` | `--muted-foreground` | Handoff indicator label, spec section labels, task ID badges |
+
+**Accent reserved for (unchanged from Phase 22):**
+1. Hovered conversation list row
+2. Currently active/selected conversation row
+3. Code block toolbar background on hover
+4. Input focus-within ring
+5. Slash command popover highlighted item
+
+**Task completion check icon:** `text-green-500 dark:text-green-400` — same Tailwind semantic color pattern as Phase 22 agent role colors. Sufficient contrast in all three themes.
+
+**Brainstormer avatar color:** `text-slate-600 dark:text-slate-400` — mapped from `agentRoleColors["general"]` in the existing `agent-role-colors.ts` utility. No new color needed.
+
+**Spec card border:** `border-border` — resolves correctly via CSS variable in all three themes.
+
+---
+
+## Component Inventory
+
+New components to build in Phase 23:
+
+| Component | shadcn base | Notes |
+|-----------|-------------|-------|
+| `ChatSpecCard.tsx` | `button`, `card` | Spec fields (What/Why/Constraints/Success) + action row; rendered inside `ChatMessage` when `messageType === "spec_card"` |
+| `ChatHandoffIndicator.tsx` | none | Separator-style indicator; `flex items-center gap-3` with flanking `<hr>` elements |
+| `ChatTaskCreatedBadge.tsx` | none | Inline badge for a single created task; receives `taskId`, `taskTitle`, `taskUrl` props |
+| `ChatStatusUpdateBadge.tsx` | none | Inline badge for task completion; receives `agentName`, `taskId`, `taskTitle`, `taskUrl` props |
+| `useBrainstormerDefault.ts` | none | Hook: queries workspace agents, returns the `general` role agent ID for auto-selection on new conversations |
+
+**Existing components to modify:**
+
+| Component | Change |
+|-----------|--------|
+| `ChatMessage.tsx` | Add rendering branch for `messageType` prop: `"spec_card"` → `ChatSpecCard`, `"handoff"` → `ChatHandoffIndicator`, `"task_created"` → `ChatTaskCreatedBadge`, `"status_update"` → `ChatStatusUpdateBadge`, `null` → existing markdown/bubble rendering |
+| `ChatPanel.tsx` | Wire `useBrainstormerDefault` to set `activeAgentId` when `activeConversationId === null` and `activeAgentId === null` |
+
+**DB migration component:**
+- `server/src/db/migrations/XXXX_add_message_type.ts` — adds `message_type text` nullable column to `chat_messages` table
+
+**Icons (lucide-react) — Phase 23 additions:**
+- `CheckCircle2` — task completion status badge
+- `Brain` — recommended default icon for the Brainstormer agent (user configures, but `brain` is a valid `AGENT_ICON_NAME`)
+
+**All icons from Phase 21 and Phase 22 remain unchanged.**
+
+---
+
+## Interaction Contract
+
+### Brainstormer Default Agent (AGENT-01)
+
+| Interaction | Behavior |
+|-------------|---------|
+| User opens new conversation (no messages) | `useBrainstormerDefault` resolves `general` role agent; `ChatAgentSelector` reflects that agent immediately |
+| User changes agent mid-flow | Normal agent selector behavior (Phase 22); no lock-in to Brainstormer |
+| No `general` agent in workspace | Fall back to first agent alphabetically; no error state; log warning to console |
+
+### Structured Questioning Flow (AGENT-02)
+
+The Brainstormer agent's structured questioning flow is entirely **server-side** (system prompt + LLM). The UI has no state machine for question steps — it renders the agent's streamed responses normally via the existing `ChatMessage` + `ChatMarkdownMessage` pipeline.
+
+The spec card is produced when the LLM outputs a message with `message_type: "spec_card"` and a structured JSON body in `content`. The server parses this and stores it as a `system` role message. The UI detects `messageType === "spec_card"` and renders `ChatSpecCard`.
+
+| Interaction | Behavior |
+|-------------|---------|
+| Brainstormer streams a clarifying question | Standard streaming rendering (Phase 22 pipeline); no special UI |
+| User answers a question | Standard message send; no special UI |
+| Brainstormer produces spec card | `message_type: "spec_card"` message appears; `ChatSpecCard` renders inline in message thread |
+
+### Spec Card Actions (AGENT-02)
+
+| Interaction | Behavior |
+|-------------|---------|
+| Click "Send to PM" | Optimistic: spec card action buttons disabled immediately; `ChatHandoffIndicator` appended to thread; POST to `/api/conversations/:id/handoff` with spec content and `targetRole: "pm"` |
+| Click "Edit" | Spec card enters edit mode: each field (What/Why/Constraints/Success) becomes an editable `<textarea>`; "Save changes" and "Discard" buttons replace the original action row |
+| Click "Save changes" (in edit mode) | PATCH spec card message with updated content; reverts to read-only spec card |
+| Click "Discard" (in edit mode) | Revert to read-only spec card; no server call |
+| Click "Save as Draft" | Spec card persists as-is; no handoff action; action buttons remain; `[Draft]` badge appended to spec card header in `text-muted-foreground text-[11px]` |
+| "Send to PM" succeeds | PM agent begins streaming a response; `ChatHandoffIndicator` already in thread; PM's response follows below it |
+| "Send to PM" fails | Toast: "Could not send to PM. Try again."; spec card action buttons re-enabled |
+
+### Handoff Indicator (AGENT-05, CHAT-09)
+
+| Interaction | Behavior |
+|-------------|---------|
+| Handoff message renders | `ChatHandoffIndicator` is non-interactive — display only; no click, no hover state |
+| Multiple handoffs in one conversation | Each handoff gets its own separator row in chronological position |
+
+### Task Created (AGENT-03, AGENT-06)
+
+| Interaction | Behavior |
+|-------------|---------|
+| Task badge renders | `ChatTaskCreatedBadge` is inline; "View task" link navigates via React Router to the issue detail page |
+| Multiple tasks from one spec | Multiple `ChatTaskCreatedBadge` elements stacked vertically |
+| Task ID not yet known (optimistic) | Badge shows "Creating task..." in `text-muted-foreground` until `taskId` is available; no spinner — inline text is sufficient |
+
+### Status Update (AGENT-07)
+
+| Interaction | Behavior |
+|-------------|---------|
+| Status update message renders | `ChatStatusUpdateBadge` is inline read-only; "View task" link navigates to issue detail |
+| Multiple status updates | Each is a separate `system` message in the thread; rendered independently |
+
+### Spec Card Edit Mode
+
+| Interaction | Behavior |
+|-------------|---------|
+| Click field textarea | Standard browser focus; no special behavior |
+| Tab between fields | Natural tab order: What → Why → Constraints → Success → Save → Discard |
+| Escape in edit mode | Discard changes (same as "Discard" button click) |
+| Save with all fields empty | "Save changes" button disabled when all four fields are empty |
+| Save with some fields empty | Allowed — partial specs are valid |
+
+---
+
+## Copywriting Contract
+
+All Phase 21 and Phase 22 copy is preserved unchanged. Phase 23 additions:
+
+| Element | Copy | Notes |
+|---------|------|-------|
+| Spec card header | "Spec Ready" | Preceded by Brainstormer identity bar; no separate heading needed |
+| Spec card section label: What | "What" | `text-[11px] uppercase tracking-wide text-muted-foreground` |
+| Spec card section label: Why | "Why" | Same style |
+| Spec card section label: Constraints | "Constraints" | Same style |
+| Spec card section label: Success | "Success" | Same style |
+| Spec card "Send to PM" button | "Send to PM" | `variant="default" size="sm"` |
+| Spec card "Edit" button | "Edit" | `variant="outline" size="sm"` |
+| Spec card "Save as Draft" button | "Save as Draft" | `variant="ghost" size="sm"` |
+| Spec card "Save changes" button (edit mode) | "Save changes" | `variant="default" size="sm"` |
+| Spec card "Discard" button (edit mode) | "Discard" | `variant="ghost" size="sm"` |
+| Spec card draft badge | "[Draft]" | `text-[11px] text-muted-foreground ml-2`; appended to Brainstormer name in identity bar |
+| Handoff indicator label | "Brainstormer → PM: spec handed off" | `text-[13px] text-muted-foreground`; `→` is unicode, not icon |
+| Task created badge: creating state | "Creating task..." | Shown before `taskId` is available |
+| Task created badge: view link | "View task" | `text-primary underline-offset-2 hover:underline` |
+| Status update: completion | "{agentName} completed {taskId}" | e.g. "Engineer completed T-123"; task title truncated to 40 chars with ellipsis |
+| Status update: view link | "View task" | Same style as task created badge |
+| Send to PM failure toast | "Could not send to PM. Try again." | Standard toast pattern; no new toast component needed |
+| Spec card edit field placeholder: What | "What should be built?" | `textarea` placeholder; shown when field is empty |
+| Spec card edit field placeholder: Why | "Why is this important?" | `textarea` placeholder |
+| Spec card edit field placeholder: Constraints | "Any constraints or requirements?" | `textarea` placeholder |
+| Spec card edit field placeholder: Success | "How will success be measured?" | `textarea` placeholder |
+
+**Tone:** Direct, functional, no corporate language. Consistent with Phase 21/22.
+
+---
+
+## States and Loading
+
+| Component | Loading state | Empty state | Error state | Notes |
+|-----------|--------------|-------------|-------------|-------|
+| `ChatSpecCard` | n/a | n/a | "Could not render spec." in `text-destructive text-[13px]` — shown if content cannot be parsed | Fallback if JSON parse fails |
+| `ChatHandoffIndicator` | n/a | n/a | n/a | Display only; no async operation |
+| `ChatTaskCreatedBadge` | "Creating task..." inline text | n/a | "Task creation failed." in `text-destructive text-[13px]` with retry link | Retry link: `text-primary underline cursor-pointer` |
+| `ChatStatusUpdateBadge` | n/a | n/a | n/a | Display only; task link navigates if available |
+| `useBrainstormerDefault` | `activeAgentId` stays `null` while agents load | Falls back to first agent | Silent fallback (no error UI — agent selector shows "Select agent" fallback) | — |
+
+**Optimistic updates:**
+- "Send to PM" click: `ChatHandoffIndicator` appended immediately before API call completes; spec card buttons disabled. On API failure, `ChatHandoffIndicator` is removed and buttons re-enabled with failure toast.
+- Task creation: `ChatTaskCreatedBadge` appears with "Creating task..." state; updates in place when `taskId` resolves.
+
+---
+
+## Theme Integration Contract
+
+Phase 23 extends Phase 21/22's zero-new-plumbing approach:
+
+- Spec card uses `bg-card` and `border-border` — resolves correctly in all three themes via CSS variables
+- Task/status badges use `bg-card` and `border-border` — same
+- Handoff separator uses `border-border` for the `<hr>` lines — correct in all themes
+- `CheckCircle2` completion icon uses `text-green-500 dark:text-green-400` — same Tailwind semantic pattern as Phase 22 agent role colors
+- No hardcoded hex colors introduced in Phase 23
+
+**THEME-01 / THEME-02 checklist (Phase 23 surfaces):**
+- `ChatSpecCard`: `bg-card`, `border-border`, `text-foreground`, `text-muted-foreground` — all CSS variables
+- `ChatHandoffIndicator`: `text-muted-foreground`, `border-border` — CSS variables
+- `ChatTaskCreatedBadge`: `bg-card`, `border-border`, `text-foreground`, `text-primary` — CSS variables
+- `ChatStatusUpdateBadge`: same as task badge + `text-green-500 dark:text-green-400`
+
+---
+
+## Accessibility
+
+Inherits all Phase 21 and Phase 22 accessibility contracts. Phase 23 additions:
+
+| Concern | Requirement |
+|---------|-------------|
+| Spec card | `role="region"` with `aria-label="Specification"` |
+| Spec card action buttons | Standard labeled buttons — no icon-only ambiguity |
+| Spec card edit textareas | Each has an explicit `aria-label`: "What to build", "Why it matters", "Constraints", "Success criteria" |
+| Handoff indicator | `aria-label="Agent handoff from Brainstormer to PM"` on the container; `aria-hidden="true"` on the `<hr>` decorators |
+| Task created badge | `role="status"` on the badge container; "View task" link has `aria-label="View task {taskId}"` |
+| Status update badge | `role="status"` on the badge container; same link labeling pattern |
+| System messages in thread | `aria-live="polite"` on `ChatMessageList` (established Phase 21) handles announcement of spec cards, handoffs, task badges — no new plumbing needed |
+| Spec card "Send to PM" disabled state | `aria-disabled="true"` when action is in-flight; `aria-busy="true"` on the card region |
+
+---
+
+## Animation and Motion
+
+Inherits Phase 21 and Phase 22 animation contracts. Phase 23 additions:
+
+| Element | Animation | Duration | Easing | CSS |
+|---------|-----------|----------|--------|-----|
+| Spec card appear | `animate-in fade-in slide-in-from-bottom-2` | 200ms | `ease-out` — shadcn default |
+| Handoff indicator appear | `animate-in fade-in` | 150ms | `ease-out` |
+| Task badge appear | `animate-in fade-in slide-in-from-bottom-1` | 150ms | `ease-out` |
+| Status badge appear | Same as task badge | 150ms | `ease-out` |
+| Spec card edit mode toggle | No animation — immediate swap; avoids layout shift (matches Phase 22 edit mode pattern) | — | — |
+| "Creating task..." → resolved | Content swap with no animation — immediate; simple text replacement | — | — |
+
+**Reduced motion:** All Phase 23 entrance animations must respect `prefers-reduced-motion` via `motion-safe:` Tailwind prefix — matching the established pattern from Phase 21/22.
+
+---
+
+## Registry Safety
+
+| Registry | Blocks Used | Safety Gate |
+|----------|-------------|-------------|
+| shadcn official | All existing Phase 21/22 components (already installed) | not required |
+| Third-party | none | not applicable |
+
+**No third-party shadcn registries used in Phase 23.** No new npm packages are required — all new components are built from existing shadcn primitives (`button`, `card`, `textarea`), Lucide icons, and CSS variable tokens already present in the project.
+
+---
+
+## Checker Sign-Off
+
+- [ ] Dimension 1 Copywriting: PASS
+- [ ] Dimension 2 Visuals: PASS
+- [ ] Dimension 3 Color: PASS
+- [ ] Dimension 4 Typography: PASS
+- [ ] Dimension 5 Spacing: PASS
+- [ ] Dimension 6 Registry Safety: PASS
+
+**Approval:** pending