arandu/techspec.md at main · devitools/arandu

Executive Summary

This TechSpec defines the implementation plan for the Arandu Session Browser & Plan Manager POC, a React-based web application at apps/web that lets developers browse coding agent sessions, review plans and task lists, and add developer annotations. The POC uses mock data with a SessionRepository adapter pattern ( src/features/sessions/data/) so the data layer can be swapped for real filesystem access later. TanStack Query v5 manages session/task data caching while Zustand handles UI state (active tab, sidebar selection). The existing VS Code-like layout shell (ActivityBar, Sidebar, TabBar) is reused and restyled with a new visual identity. Session detail views use an accumulating tab model (max ~5 tabs, VS Code-style). Plan markdown is rendered with the existing react-markdown + remark-gfm pipeline, and tasks are extracted from [ ]/[x] checkboxes in the repository layer as structured Task[] objects cached by TanStack Query. Developer annotations are in-memory only (not persisted), using the existing ReviewPanel block-based comment system with line-range selection.

Key risks: mock data fidelity vs. real Copilot session structure, and ensuring the adapter interface is broad enough for future real implementations without over-engineering the POC.

System Architecture

Domain Placement

apps/web/src/
├── features/
│   └── sessions/                    # NEW — Session browser feature module
│       ├── data/
│       │   ├── session.repository.ts      # SessionRepository interface
│       │   ├── mock-session.repository.ts # MockSessionRepository implementation
│       │   ├── mock-data.ts               # Hardcoded mock session data
│       │   └── plan-parser.ts             # Markdown → Task[] parser
│       ├── hooks/
│       │   ├── use-sessions.ts            # TanStack Query hook: session list
│       │   ├── use-session-detail.ts      # TanStack Query hook: single session + plan + tasks
│       │   └── use-session-comments.ts    # In-memory comment state hook
│       ├── components/
│       │   ├── SessionList.tsx            # Sidebar session list component
│       │   ├── SessionDetail.tsx          # Tab content: plan viewer + task list
│       │   ├── TaskList.tsx               # Extracted task list display
│       │   └── SessionTab.tsx             # Individual tab header component
│       ├── types/
│       │   └── session.types.ts           # Session, Plan, Task, Comment types
│       └── index.ts                       # Public exports
├── components/
│   └── layout/                      # EXISTING — Reuse & restyle
│       ├── ActivityBar.tsx                # Vertical icon bar (restyle)
│       ├── Sidebar.tsx                    # Collapsible panel (extend with SessionList)
│       ├── TabBar.tsx                     # Horizontal tabs (extend with session tabs)
│       └── MainContent.tsx                # NEW — Tab content area orchestrator
│   └── markdown/                    # EXISTING — Reuse as-is
│       └── MarkdownViewer.tsx             # Block-based markdown with line numbers
│   └── review/                      # EXISTING — Reuse as-is
│       └── ReviewPanel.tsx                # Comment system with line-range selection
├── store/
│   └── useAranduStore.ts            # MODIFY — Add session UI state (tabs, active session)
├── lib/
│   └── query-client.ts             # NEW — TanStack Query client setup
└── App.tsx                          # MODIFY — Wire QueryClientProvider + session feature

Boundaries:

features/sessions/ owns all session-specific logic (data, hooks, components, types)
components/layout/ is shared infrastructure — extended but not owned by the session feature
components/markdown/ and components/review/ are reused as-is from the existing codebase
store/useAranduStore.ts is extended with session-specific UI slices (tab state, active session)
lib/query-client.ts provides the shared TanStack Query client instance

Component Overview

Component	Responsibility	Key Dependencies
`SessionRepository`	Abstract interface for session data access	None (pure interface)
`MockSessionRepository`	Hardcoded mock implementation with plan.md parsing	`plan-parser.ts`, mock data
`plan-parser.ts`	Extracts `Task[]` from markdown checkbox syntax	None (pure function)
`use-sessions`	TanStack Query hook for session list	`SessionRepository`, `@tanstack/react-query`
`use-session-detail`	TanStack Query hook for session plan + tasks	`SessionRepository`, `@tanstack/react-query`
`use-session-comments`	In-memory annotation state per session	React `useState`/`useRef`
`SessionList`	Renders session entries in the Sidebar	`use-sessions`, Zustand store
`SessionDetail`	Orchestrates plan viewer + task list + review panel	`use-session-detail`, `MarkdownViewer`, `ReviewPanel`
`TaskList`	Displays extracted tasks with checkbox status	`Task[]` from parent
`TabBar` (extended)	Manages session tab headers with close buttons	Zustand store (tab state)
`MainContent`	Routes tab content area to correct SessionDetail	Zustand store (active tab)

Data flow: User clicks session in SessionList → Zustand adds tab → MainContent renders SessionDetail for active tab → use-session-detail hook fetches plan+tasks from SessionRepository via TanStack Query → MarkdownViewer renders plan, TaskList renders extracted tasks, ReviewPanel enables annotations.

Implementation Design

Core Interfaces

// apps/web/src/features/sessions/data/session.repository.ts
interface SessionRepository {
  /** List all available sessions, sorted by modification date descending */
  listSessions (): Promise<SessionSummary[]>;

  /** Get full session detail including raw plan markdown and parsed tasks */
  getSessionDetail (sessionId: string): Promise<SessionDetail>;
}

// apps/web/src/features/sessions/data/plan-parser.ts
/** Pure function: extracts Task[] from plan.md markdown content */
function parsePlanTasks (markdown: string): Task[];

// apps/web/src/features/sessions/data/mock-session.repository.ts
class MockSessionRepository implements SessionRepository {
  async listSessions (): Promise<SessionSummary[]> {
    // Returns hardcoded session summaries with realistic Copilot-like data
  }

  async getSessionDetail (sessionId: string): Promise<SessionDetail> {
    // Returns mock plan markdown + runs parsePlanTasks() to extract Task[]
  }
}

// apps/web/src/lib/query-client.ts
import { QueryClient } from '@tanstack/react-query';

export const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      staleTime: Infinity,    // Mock data never goes stale
      gcTime: 1000 * 60 * 30, // 30 min garbage collection
      retry: false,            // No retries for mock data
    },
  },
});

Data Models

// apps/web/src/features/sessions/types/session.types.ts

/** Shown in the sidebar session list */
interface SessionSummary {
  id: string;                    // UUID matching Copilot session ID
  name: string;                  // Derived from workspace.yaml or first line of plan
  summary: string;               // Brief description or plan excerpt
  createdAt: string;             // ISO 8601
  modifiedAt: string;            // ISO 8601
  agentType: 'copilot' | 'generic'; // Agent identifier for UI badges
  workspacePath: string;         // Original workspace directory path
  taskStats: {
    total: number;
    completed: number;
  };
}

/** Full session detail for the tab content view */
interface SessionDetail {
  id: string;
  name: string;
  summary: string;
  createdAt: string;
  modifiedAt: string;
  agentType: 'copilot' | 'generic';
  workspacePath: string;
  plan: {
    raw: string;                 // Original plan.md markdown content
    tasks: Task[];               // Extracted from [ ]/[x] checkboxes
  };
}

/** Individual task extracted from plan.md checkboxes */
interface Task {
  id: string;                    // Generated: `task-{lineNumber}`
  title: string;                 // Text content after [ ] or [x]
  completed: boolean;            // true if [x], false if [ ]
  lineNumber: number;            // Source line in plan.md (for comment anchoring)
  indent: number;                // Nesting level (0-based, from leading whitespace)
}

/** Developer annotation on plan content */
interface SessionComment {
  id: string;                    // UUID
  sessionId: string;
  lineRange: {
    start: number;               // Start line in plan.md
    end: number;                 // End line in plan.md
  };
  content: string;               // Comment text (plain text)
  createdAt: string;             // ISO 8601
}

/** Tab state in Zustand store */
interface SessionTab {
  sessionId: string;
  title: string;                 // Session name for tab header
}

Validation rules:

SessionSummary.id and SessionDetail.id must be valid UUIDs
Task.lineNumber must be > 0 and correspond to actual plan.md lines
SessionComment.lineRange.start must be <= lineRange.end
SessionTab list max length: 5 (enforced in Zustand action)

Contract Specifications

Data Contracts

SessionRepository Interface Contract:

Method	Input	Output	Error Behavior
`listSessions()`	none	`Promise<SessionSummary[]>`	Returns empty array on failure
`getSessionDetail(sessionId)`	`string` (UUID)	`Promise<SessionDetail>`	Throws `SessionNotFoundError` if ID unknown

class SessionNotFoundError extends Error {
  constructor (public sessionId: string) {
    super(`Session not found: ${sessionId}`);
    this.name = 'SessionNotFoundError';
  }
}

TanStack Query Key Conventions:

Session list: ['sessions']
Session detail: ['sessions', sessionId]

Zustand Store Extension (session UI slice):

// Added to existing useAranduStore.ts
interface SessionUIState {
  tabs: SessionTab[];            // Open session tabs (max 5)
  activeTabId: string | null;    // Currently visible session tab
  sidebarSessionsExpanded: boolean;

  // Actions
  openSession: (session: SessionSummary) => void;
  closeTab: (sessionId: string) => void;
  setActiveTab: (sessionId: string) => void;
}

openSession behavior:

If session already has a tab → activate that tab (no duplicate)
If tabs.length >= 5 → close oldest tab, then add new
Otherwise → add new tab at end, activate it

closeTab behavior:

Remove tab from array
If closed tab was active → activate the tab to the left (or first tab, or null if empty)

Comment Data Contract (In-Memory)

Comments are stored per-session in a Map<string, SessionComment[]> managed by the use-session-comments hook. No persistence, no API. The hook exposes:

interface UseSessionCommentsReturn {
  comments: SessionComment[];
  addComment: (lineRange: { start: number; end: number }, content: string) => void;
  removeComment: (commentId: string) => void;
}

API Endpoints

Not applicable — this POC has no backend API. All data flows through the in-memory SessionRepository interface.

Integration Points

Existing Component Integration

Existing Component	Integration Strategy	Modifications Required
`ActivityBar`	Add "Sessions" icon (e.g., `FolderGit2` from lucide-react)	Add new nav item to icon list
`Sidebar`	Render `SessionList` when Sessions activity is selected	Add conditional content rendering
`TabBar`	Extend to show `SessionTab` headers with close buttons	Add session tab type, close button handler
`MarkdownViewer`	Reuse as-is inside `SessionDetail` for plan.md rendering	No changes — receives markdown string prop
`ReviewPanel`	Reuse as-is inside `SessionDetail` for annotations	Wire to `use-session-comments` hook instead of store

External Dependencies (Already Installed)

Dependency	Version	Usage	Status
`@tanstack/react-query`	^5.x	Session data caching	Installed, currently unused — activate
`react-markdown`	^9.x	Plan.md rendering	Already in use by MarkdownViewer
`remark-gfm`	^4.x	GFM support (checkboxes, tables)	Already in use
`zustand`	^5.x	UI state management	Already in use
`lucide-react`	^0.x	Icons	Already in use
`shadcn/ui` components	latest	UI primitives (ScrollArea, Badge, Button)	Already configured

No new dependencies required. All needed packages are already installed.

Sequence and Failure Flows

Primary Execution Sequence

App Initialization (App.tsx)

Wrap app in QueryClientProvider with shared queryClient
Instantiate MockSessionRepository and provide via React context or module-level singleton
Render existing layout shell (ActivityBar + Sidebar + TabBar + MainContent)

Session List Loading (on app mount)

SessionList component mounts inside Sidebar
useSessions() hook triggers queryClient.fetchQuery(['sessions'], () => repository.listSessions())
TanStack Query caches SessionSummary[] — staleTime: Infinity (mock data)
Sidebar renders list sorted by modifiedAt descending

Session Selection (user click in sidebar)

User clicks a session entry in SessionList
openSession(session) Zustand action fires → adds/activates tab
TabBar re-renders with new tab header
MainContent renders SessionDetail for active sessionId
useSessionDetail(sessionId) hook triggers queryClient.fetchQuery(['sessions', sessionId], () => repository.getSessionDetail(sessionId))
TanStack Query caches SessionDetail (includes raw markdown + parsed Task[])

Plan Rendering (inside SessionDetail)

MarkdownViewer receives plan.raw markdown string
Renders with block-based line numbers (existing functionality)
TaskList receives plan.tasks and renders checkbox-style task items

Annotation (user interaction)

User selects line range in MarkdownViewer (existing block selection)
ReviewPanel opens with selected range
User types annotation text and submits
addComment() from use-session-comments stores in-memory
Comment indicators appear on MarkdownViewer gutter (existing functionality)

Tab Switching

User clicks different tab in TabBar
setActiveTab(sessionId) fires in Zustand
MainContent swaps to corresponding SessionDetail
TanStack Query serves cached data (no re-fetch)

Failure Behavior

Failure Mode	Expected Behavior	User-Visible Outcome
Session list fetch fails	TanStack Query `error` state	Sidebar shows "Failed to load sessions" message with retry button
Session detail fetch fails	TanStack Query `error` state	Tab content shows "Session not found" error message
Invalid session ID in openSession	`SessionNotFoundError` caught by TanStack Query	Error boundary in tab content area
Max tabs exceeded (>5)	Oldest tab auto-closed by `openSession` action	Oldest tab disappears, new tab opens
Plan.md parsing yields no tasks	`parsePlanTasks` returns empty `Task[]`	TaskList renders "No tasks found" placeholder
Comment on invalid line range	`addComment` validates range, silently ignores invalid	No comment created, no error shown

Since this is a mock-data POC, most failure modes are edge cases during development rather than production concerns.

Impact Analysis

Affected Component	Type of Impact	Description & Risk Level	Required Action
`App.tsx`	Structural Change	Add `QueryClientProvider` wrapper, session repository provider. Low risk — additive only.	Wire providers around existing app tree
`useAranduStore.ts`	State Extension	Add session UI slice (tabs, activeTab). Low risk — new slice, no changes to existing state.	Add `SessionUIState` slice using Zustand's slice pattern
`ActivityBar`	UI Extension	Add "Sessions" navigation icon. Low risk — one new item in existing icon array.	Add icon entry
`Sidebar`	Content Extension	Conditionally render `SessionList` vs. existing content based on active activity. Low risk.	Add conditional rendering branch
`TabBar`	Feature Extension	Support session-type tabs with close buttons. Medium risk — existing tab logic may need generalization.	Extend tab model to support closeable session tabs
`MarkdownViewer`	No Change	Reused as-is for plan.md rendering. No risk.	None
`ReviewPanel`	Integration Change	Wire to `use-session-comments` hook instead of store for session-specific comments. Low risk.	Pass comments/handlers as props instead of reading from store
CSS/Theme	Visual Overhaul	Restyle all layout components with new visual identity. Medium risk — broad surface area.	Update CSS variables, component styles in Tailwind config

Testing Approach

Unit Tests

Test framework: Vitest (already configured in vitest.config.ts)

Component	Test Focus	Mock Requirements
`parsePlanTasks()`	Checkbox extraction accuracy, edge cases (nested, empty, mixed)	None — pure function
`MockSessionRepository`	Returns expected data shape, `SessionNotFoundError` for unknown IDs	None
`openSession` action	Tab accumulation, duplicate prevention, max-5 eviction, activation	None — Zustand store test
`closeTab` action	Tab removal, active tab reassignment	None
`use-session-comments`	Add/remove comments, line range validation	None

Critical test cases for parsePlanTasks:

- [ ] unchecked task       → { completed: false, title: "unchecked task" }
- [x] completed task       → { completed: true, title: "completed task" }
  - [ ] nested task        → { completed: false, indent: 1 }
- [ ] task with **bold**   → { title: "task with **bold**" }
Empty markdown             → []
Markdown with no checkboxes → []
Mixed content with checkboxes → only checkbox items extracted

Integration Tests

Test Scenario	Components Involved	Validation
Session list renders on mount	`SessionList` + `useSessions` + `MockSessionRepository`	List shows all mock sessions with correct metadata
Click session opens tab	`SessionList` + `TabBar` + `SessionDetail`	New tab appears, detail content loads
Plan markdown renders with tasks	`SessionDetail` + `MarkdownViewer` + `TaskList`	Markdown rendered, tasks extracted and shown
Annotation workflow	`SessionDetail` + `ReviewPanel` + `use-session-comments`	Select lines → add comment → comment indicator appears
Tab switching preserves state	Multiple `SessionDetail` instances	Switch tabs, previous tab retains scroll position
Max tabs behavior	6 sequential session opens	5th tab opens normally, 6th evicts oldest

End-to-End / Contract Verification

Verification	Method
`SessionRepository` contract	TypeScript compiler enforces interface implementation
Mock data shape matches real Copilot format	Manual review of mock data against real `~/.copilot/session-state/` structure
TanStack Query cache keys	Unit tests verify cache hits on repeated fetches
Zustand tab state invariants	Unit tests verify max-5, no duplicates, active-tab consistency

Development Sequencing

Build Order

Types & Interfaces (session.types.ts, session.repository.ts) — Foundation with no dependencies. Enables parallel work on all other components.
Plan Parser (plan-parser.ts) — Pure function, independently testable. Unblocks mock repository implementation.
Mock Data & Repository (mock-data.ts, mock-session.repository.ts) — Depends on types + parser. Creates realistic session data matching Copilot format. Provides the data layer for all UI work.
TanStack Query Setup (query-client.ts, use-sessions.ts, use-session-detail.ts) — Depends on repository. Wire TanStack Query hooks with mock repository as query functions.
Zustand Store Extension (useAranduStore.ts session UI slice) — Add tab state management (openSession, closeTab, setActiveTab). Independent of data hooks.
Session List Component (SessionList.tsx) — Depends on useSessions hook. First visible UI — renders sessions in sidebar.
Session Detail Components (SessionDetail.tsx, TaskList.tsx, SessionTab.tsx) — Depends on useSessionDetail hook + existing MarkdownViewer. Core content view.
Layout Integration (ActivityBar, Sidebar, TabBar, MainContent, App.tsx) — Wire session feature into existing layout shell. Add QueryClientProvider.
Comment Integration (use-session-comments.ts + wire to ReviewPanel) — In-memory annotation support using existing ReviewPanel.
Visual Restyling — Update CSS variables, Tailwind config, and component styles for new visual identity across all layout components.

Technical Dependencies

Dependency	Status	Blocking?
TanStack Query v5	Installed, unused	No — just need to import and configure
Zustand v5	Active	No — extend existing store
react-markdown + remark-gfm	Active	No — already rendering markdown
shadcn/ui components	Configured	No — already available
Vitest	Configured	No — test infrastructure ready

No blocking external dependencies. All required libraries are already installed.

Monitoring & Observability

Since this is a client-side POC with mock data, traditional server-side monitoring does not apply. Instead:

Development-time observability:

Tool	Purpose	Implementation
React Query DevTools	Inspect cache state, query status, stale/fresh timing	Add `<ReactQueryDevtools>` in `App.tsx` (dev only)
Zustand DevTools	Inspect tab state, active session, sidebar state	Already available via `devtools` middleware in existing store
Browser Console	Error logging for repository failures, parse errors	`console.error` in TanStack Query `onError` callbacks
Vite HMR	Hot reload during development	Already configured

Key metrics to log (console):

Session list fetch duration (even for mock — validates hook wiring)
Plan parse time and task count per session
Tab state transitions (open/close/switch)

Operational Acceptance

Not applicable for a client-side POC. Acceptance criteria:

App loads without errors in Chrome/Edge (latest)
All mock sessions appear in sidebar
Clicking a session opens a tab with plan content
Tasks extracted and displayed from plan markdown
Annotations can be added/removed via ReviewPanel
Max 5 tabs enforced, oldest evicted

Rollout and Rollback

Rollout Plan

This is a greenfield POC in apps/web — no production traffic, no existing users to migrate.

Development branch: All work on feature branch off main
Incremental PRs: Follow build order above — types/data first, UI second, integration last
Local validation: npm run dev serves the POC at localhost:5173
No deployment pipeline needed: POC is local-only for now

Rollback Plan

Git revert: Since all changes are in apps/web/src/features/sessions/ and minimal modifications to existing files, revert is straightforward
Existing functionality preserved: Layout shell modifications are additive (new activity item, new tab type) — removing them restores original behavior
No data migration: In-memory mock data, nothing to roll back

Technical Considerations

Key Decisions

Decision	Rationale	Alternative Rejected
Feature Module Architecture (`src/features/sessions/`)	Clean domain boundary, easy to find/modify session code, follows React community conventions	Flat structure (all in `src/components/`) — harder to navigate as feature grows
SessionRepository adapter pattern	Enables future swap to real filesystem access without changing hooks/components	Inline mock data in store — requires refactoring when adding real data
TanStack Query for data + Zustand for UI	TanStack Query provides caching, loading/error states, deduplication for free. Zustand handles synchronous UI state (tabs). Clean separation.	Zustand for everything — loses caching/query semantics; TanStack Query for everything — poor fit for synchronous UI state
Plan.md parsing in repository layer	Parsed `Task[]` cached by TanStack Query alongside raw markdown. Single fetch returns both.	Parsing in component — mixes data transformation with rendering, re-parses on every render
In-memory comments (not persisted)	Simplest implementation, validates the annotation UX without persistence complexity	localStorage — adds serialization complexity for a POC that may pivot
No router (Zustand-driven tabs)	Single-screen app with tabs doesn't need URL routing. Simpler architecture.	React Router — adds dependency and complexity for a single-screen POC
Max 5 tabs with oldest eviction	Prevents memory bloat, familiar VS Code pattern	Unlimited tabs — memory concerns, cluttered UI

Known Risks

Risk	Likelihood	Impact	Mitigation
Mock data diverges from real Copilot format	Medium	Medium — future adapter may need rework	Base mock data on actual `~/.copilot/session-state/` files examined during discovery
SessionRepository interface too narrow	Low	Medium — adding methods later is straightforward	Start minimal (list + detail), extend when real data requirements emerge
New visual identity delays POC	Medium	Low — functionality works regardless of styling	Build functionality first, restyle as final step
Existing layout components tightly coupled to current store	Low	Medium — may require prop refactoring	Audit each layout component's store dependencies before integration
TanStack Query staleTime: Infinity masks reactivity issues	Low	Low — only matters when moving to real data	Document that real implementation must configure appropriate staleTime

Assumptions

apps/web at /Users/william/Work/Projects/Devitools/arandu/apps/web is the correct working directory for this POC
All existing apps/web dependencies (@tanstack/react-query, react-markdown, remark-gfm, zustand, shadcn/ui) are at compatible versions and working
The existing layout components (ActivityBar, Sidebar, TabBar, MarkdownViewer, ReviewPanel) are functional and can be extended without major refactoring
Mock data matching Copilot's workspace.yaml + plan.md format is sufficient to validate the session browser concept
In-memory comment storage is acceptable for POC validation — persistence will be added in a future iteration
Chrome/Edge (latest) is the target browser — no IE/Safari compatibility needed for POC
The plan-parser.ts only needs to handle GFM-style - [ ] and - [x] checkboxes (not arbitrary task formats)

Open Technical Questions

Visual identity specifics: The "new visual identity" needs a design reference or style guide. The TechSpec assumes this will be provided during the restyling phase — functionality can proceed without it.
Agent-agnostic session format: While the UI is designed to be agent-agnostic (via agentType field), the specific session format for non-Copilot agents (Claude Code, Gemini CLI) is not yet defined. The mock data can include agentType: 'generic' entries for validation.

Standards Compliance

Standard	Compliance
TypeScript strict mode	Yes — all new code uses strict TypeScript with explicit types
React 18 patterns	Yes — functional components, hooks, no class components
shadcn/ui conventions	Yes — uses shadcn/ui primitives (ScrollArea, Badge, Button, etc.)
Tailwind CSS	Yes — all styling via Tailwind utility classes + CSS variables
Vitest testing	Yes — unit + integration tests using existing Vitest config
ESLint	Yes — follows existing `eslint.config.js` rules
Feature module pattern	Yes — self-contained `src/features/sessions/` with clear public API
TanStack Query conventions	Yes — query keys as arrays, custom hooks wrapping `useQuery`
Zustand patterns	Yes — slice pattern for store extension, devtools middleware

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Executive Summary

System Architecture

Domain Placement

Component Overview

Implementation Design

Core Interfaces

Data Models

Contract Specifications

Data Contracts

Comment Data Contract (In-Memory)

API Endpoints

Integration Points

Existing Component Integration

External Dependencies (Already Installed)

Sequence and Failure Flows

Primary Execution Sequence

Failure Behavior

Impact Analysis

Testing Approach

Unit Tests

Integration Tests

End-to-End / Contract Verification

Development Sequencing

Build Order

Technical Dependencies

Monitoring & Observability

Operational Acceptance

Rollout and Rollback

Rollout Plan

Rollback Plan

Technical Considerations

Key Decisions

Known Risks

Assumptions

Open Technical Questions

Standards Compliance

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Executive Summary

System Architecture

Domain Placement

Component Overview

Implementation Design

Core Interfaces

Data Models

Contract Specifications

Data Contracts

Comment Data Contract (In-Memory)

API Endpoints

Integration Points

Existing Component Integration

External Dependencies (Already Installed)

Sequence and Failure Flows

Primary Execution Sequence

Failure Behavior

Impact Analysis

Testing Approach

Unit Tests

Integration Tests

End-to-End / Contract Verification

Development Sequencing

Build Order

Technical Dependencies

Monitoring & Observability

Operational Acceptance

Rollout and Rollback

Rollout Plan

Rollback Plan

Technical Considerations

Key Decisions

Known Risks

Assumptions

Open Technical Questions

Standards Compliance