> For the complete documentation index, see [llms.txt](https://faction-os.gitbook.io/faction-os-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase13-session02-design-tokens-and-layout-shell/implementation_summary.md).

# Implementation Summary

**Session ID**: `phase13-session02-design-tokens-and-layout-shell` **Package**: public-website **Completed**: 2026-06-01 **Duration**: 2.5 hours

***

## Overview

Built the shared public-website shell for the FactionOS marketing site. The session replaced the starter home page styling with a reusable Astro layout system, global design tokens, navigation metadata, shell chrome, and system primitives that later Phase 13 and Phase 14 pages can compose without duplicating structure.

***

## Deliverables

### Files Created

| File                                                              | Purpose                                                                                   | Lines |
| ----------------------------------------------------------------- | ----------------------------------------------------------------------------------------- | ----- |
| `public-website/src/styles/global.css`                            | Shared reset, tokens, typography, layout helpers, focus states, and reduced-motion rules. | 448   |
| `public-website/src/data/navigation.ts`                           | Shared navigation data and external destination metadata.                                 | 96    |
| `public-website/src/layouts/BaseLayout.astro`                     | Document-level Astro layout with global stylesheet and metadata.                          | 39    |
| `public-website/src/layouts/ContentLayout.astro`                  | Reusable content page layout built on the shared shell.                                   | 62    |
| `public-website/src/layouts/LegalLayout.astro`                    | Legal/policy layout with review-state affordances.                                        | 84    |
| `public-website/src/components/layout/Shell.astro`                | Shared page chrome composition.                                                           | 28    |
| `public-website/src/components/layout/Section.astro`              | Full-width band and unframed section primitive.                                           | 101   |
| `public-website/src/components/navigation/SkipLink.astro`         | Keyboard skip link component.                                                             | 36    |
| `public-website/src/components/navigation/Header.astro`           | Route-aware desktop header and primary navigation.                                        | 204   |
| `public-website/src/components/navigation/MobileNavigation.astro` | Accessible mobile navigation control and panel.                                           | 289   |
| `public-website/src/components/navigation/Footer.astro`           | Shared footer link groups and boundary copy.                                              | 189   |
| `public-website/src/components/system/ButtonLink.astro`           | Link-style button primitive with external affordance.                                     | 121   |
| `public-website/src/components/system/Badge.astro`                | Status badge primitive with text-visible state.                                           | 91    |
| `public-website/src/components/system/Panel.astro`                | Framed repeated-item/tool primitive.                                                      | 95    |
| `public-website/src/components/system/MetricStrip.astro`          | Responsive labeled metric strip primitive.                                                | 110   |

### Files Modified

| File                                                                                          | Changes                                                                                               |
| --------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- |
| `public-website/src/pages/index.astro`                                                        | Replaced inline starter CSS and direct document shell with the shared layout and reusable primitives. |
| `.spec_system/specs/phase13-session02-design-tokens-and-layout-shell/implementation-notes.md` | Recorded task-by-task implementation notes and validation evidence.                                   |
| `.spec_system/state.json`                                                                     | Marked the session complete and cleared the current session pointer.                                  |
| `.spec_system/PRD/phase_13/PRD_phase_13.md`                                                   | Updated the phase progress tracker and progress percentage.                                           |
| `package.json`                                                                                | Incremented the repository patch version.                                                             |

***

## Technical Decisions

1. **Static Astro shell first**: Kept the public website in static-output Astro components and layouts so later pages inherit one chrome and token system without introducing runtime dependencies.
2. **Local-first typography**: Used font stacks and system fallbacks only, preserving the privacy boundary of no third-party font request in this session.
3. **Explicit external destinations**: Centralized demo and docs links in navigation data so buttons and footer links can expose external posture and accessible labels consistently.

***

## Test Results

| Metric   | Value |
| -------- | ----- |
| Tests    | 3     |
| Passed   | 3     |
| Coverage | N/A   |

Validation commands passed:

* `npm --prefix public-website run typecheck`
* `npm --prefix public-website run build`
* `npx biome lint public-website/src public-website/src/pages/index.astro .spec_system/specs/phase13-session02-design-tokens-and-layout-shell --reporter=summary`

***

## Lessons Learned

1. Keeping navigation metadata separate from shell components reduced duplication across the header, footer, and mobile menu.
2. The global CSS foundation is the right place to enforce the reduced-motion posture for decorative effects.

***

## Future Considerations

Items for future sessions:

1. Add SEO metadata and static site plumbing in the next phase session.
2. Reuse these shell primitives to build the remaining public pages without duplicating layout logic.

***

## Session Statistics

* **Tasks**: 24 completed
* **Files Created**: 15
* **Files Modified**: 5
* **Tests Added**: 0
* **Blockers**: 0 resolved


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