> 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/phase16-session02-performance-and-image-optimization/implementation-notes.md).

# Implementation Notes

**Session ID**: `phase16-session02-performance-and-image-optimization` **Package**: `public-website` **Started**: 2026-06-02 03:10 **Last Updated**: 2026-06-02 03:35

***

## Session Progress

| Metric              | Value   |
| ------------------- | ------- |
| Tasks Completed     | 20 / 20 |
| Estimated Remaining | 0 hours |
| Blockers            | 0       |

***

## Environment Baseline

* Spec analyzer current session: `phase16-session02-performance-and-image-optimization`.
* Package scope: `public-website`.
* Environment prerequisite check: pass for `.spec_system`, `jq`, `git`, package directory, package manifest, and npm workspace manager.
* Tool check: `node` and `npm` available in the shell.
* Repository runtime baseline: `.nvmrc` and root/public website package engines require Node.js `26.2.0` or newer.
* Current shell versions: Node.js `24.14.0`, npm `10.5.1`.
* Baseline-compatible verification runner: `npx -y -p node@26.2.0 -p npm@11.16.0` verified Node.js `26.2.0` and npm `11.16.0`.
* Final package checks will run through the baseline-compatible runner unless the shell version is upgraded during the session.

***

## Baseline Inventory

### Launch Assets

Source assets are present under `public-website/src/assets`.

| Bytes   | Path                                                                   |
| ------- | ---------------------------------------------------------------------- |
| 2994468 | `public-website/src/assets/showcase/heroes-banner.jpg`                 |
| 458090  | `public-website/src/assets/showcase/factionos-strip.webp`              |
| 312990  | `public-website/src/assets/brand/factionos-logo-square.webp`           |
| 177835  | `public-website/src/assets/brand/og-default.png`                       |
| 147962  | `public-website/src/assets/showcase/factionos-strip-cover.jpg`         |
| 112477  | `public-website/src/assets/showcase/strip-frames/3-victory_chorus.jpg` |
| 101331  | `public-website/src/assets/showcase/strip-frames/2-mid_combat.jpg`     |
| 95084   | `public-website/src/assets/showcase/strip-frames/4-night_watch.jpg`    |
| 84579   | `public-website/src/assets/showcase/strip-frames/1-dusk_muster.jpg`    |
| 53896   | `public-website/src/assets/brand/factionos-logo.webp`                  |

### Public Pass-Through Files

`public-website/public` is limited to intentional pass-through launch files:

| Bytes | Path                                     | Status                         |
| ----- | ---------------------------------------- | ------------------------------ |
| 1388  | `public-website/public/press/README.md`  | Press pass-through policy only |
| 904   | `public-website/public/favicon.svg`      | Browser favicon                |
| 598   | `public-website/public/site.webmanifest` | PWA/browser manifest           |
| 74    | `public-website/public/robots.txt`       | Search crawler policy          |

### Media Registry Entries

The registry has ten package-local image keys:

* `brand.logo`
* `brand.logoSquare`
* `brand.ogDefault`
* `showcase.strip`
* `showcase.stripCover`
* `showcase.heroesBanner`
* `showcase.stripFrameDuskMuster`
* `showcase.stripFrameMidCombat`
* `showcase.stripFrameVictoryChorus`
* `showcase.stripFrameNightWatch`

Registry observations:

* `brand.ogDefault` is the only high-priority eager media entry.
* `showcase.strip` has `showcase.stripCover` as its reduced-motion fallback.
* `showcase.heroesBanner` is a 2994468-byte conditional showcase asset and the largest launch payload risk.
* The typed `getWebsiteMediaAsset` switch is exhaustive over all keys.

### Font References

* No `@font-face`, Google Fonts, external stylesheet, preconnect, or remote font URL was found in source.
* Font tokens use system/local fallback families only:
  * `--font-display`: `Orbitron, Rajdhani, "Arial Narrow", "Segoe UI", system-ui, sans-serif`
  * `--font-body`: Inter-like local/system sans fallback stack
  * `--font-code`: local monospace fallback stack
* Because Orbitron, Rajdhani, and JetBrains Mono are referenced by family name without a shipped webfont, the browser will use installed fonts if available, then fall back locally. This avoids third-party font requests but can vary visually by platform.

### Browser Scripts

Source script surfaces:

* `public-website/src/components/seo/JsonLd.astro` emits inert `application/ld+json`.
* `public-website/src/components/navigation/MobileNavigation.astro` contains the mobile menu behavior, click handlers, keydown handling, media query handling, pageshow reset, pagehide cleanup, and a transition timer.
* `public-website/src/components/navigation/SkipLink.astro` contains skip-link focus behavior.

Static boundary scan found no source-side `fetch`, WebSocket constructor, EventSource constructor, browser storage writes, `sendBeacon`, analytics SDK, hosted form script, or third-party embed.

### High-Cost CSS And Motion Surfaces

Primary review targets:

* `public-website/src/styles/global.css`: page radial gradients, tactical grid mask, scanline animation, blurred atmospheric wash, and pulse-ring animation.
* `public-website/src/components/marketing/HeroCockpit.astro`: first-viewport gradients, panel shadows, and cockpit scan animation.
* `public-website/src/components/marketing/BattlefieldMap.astro`: repeated gradients and three continuous animations, already disabled under reduced motion.
* `public-website/src/components/navigation/Header.astro`: `backdrop-filter: blur(16px)` on the sticky header.
* `public-website/src/components/marketing/PressAssetGrid.astro`: card gradients and panel shadows for preview media.

### Baseline Built Output

| Item                         | Size |
| ---------------------------- | ---- |
| `public-website/dist`        | 8.7M |
| `public-website/dist/_astro` | 7.0M |
| `public-website/src/assets`  | 4.4M |
| `public-website/public`      | 24K  |

Byte totals:

* `public-website/dist`: 8691226 bytes.
* `public-website/dist/_astro`: 7170262 bytes.
* Built JavaScript files: none found.

Largest current built outputs:

| Bytes   | Path                                                                     |
| ------- | ------------------------------------------------------------------------ |
| 2994468 | `public-website/dist/_astro/heroes-banner.DdvYTajD.jpg`                  |
| 458090  | `public-website/dist/_astro/factionos-strip.zIUdbvcc.webp`               |
| 435458  | `public-website/dist/_astro/factionos-strip.zIUdbvcc_Z1ds8CM.webp`       |
| 312990  | `public-website/dist/_astro/factionos-logo-square.C6ezxowc.webp`         |
| 312816  | `public-website/dist/_astro/heroes-banner.DdvYTajD_1PmGv1.webp`          |
| 276690  | `public-website/dist/_astro/factionos-strip.zIUdbvcc_ZHkCCV.webp`        |
| 227462  | `public-website/dist/_astro/factionos-logo-square.C6ezxowc_Z2mcan7.webp` |
| 177835  | `public-website/dist/_astro/og-default.CNq-ZtZO.png`                     |
| 169840  | `public-website/dist/_astro/factionos-strip.zIUdbvcc_Z6Xy01.webp`        |
| 147962  | `public-website/dist/_astro/factionos-strip-cover.CZxQglb4.jpg`          |

Largest baseline route HTML outputs:

| Bytes | Path                                      |
| ----- | ----------------------------------------- |
| 92364 | `public-website/dist/security/index.html` |
| 88027 | `public-website/dist/index.html`          |
| 81250 | `public-website/dist/product/index.html`  |
| 76884 | `public-website/dist/faq/index.html`      |
| 68723 | `public-website/dist/features/index.html` |

Largest baseline CSS outputs:

| Bytes | Path                                               |
| ----- | -------------------------------------------------- |
| 48833 | `public-website/dist/_astro/index.DqxcZuei.css`    |
| 30018 | `public-website/dist/_astro/product.LBMcjKh5.css`  |
| 28977 | `public-website/dist/_astro/security.DnnLWtcX.css` |
| 19866 | `public-website/dist/_astro/features.CVZFmSZU.css` |
| 19819 | `public-website/dist/_astro/Shell.WIYwKDXS.css`    |

### Payload Placeholders

Fixed during implementation:

* Replaced the press-preview import for `showcase.heroesBanner` with a 168720-byte package-local WebP launch derivative generated from the tracked 2994468-byte JPEG source.
* Removed the 2994468-byte raw hero JPEG from built `_astro` output.
* Capped generated press preview widths for the operator lineup at 1280px.
* Removed global page-wide scanline and status pulse animations.
* Kept built JavaScript output at zero files.

Accepted launch tradeoffs:

* Astro still emits raw imported source copies for currently registry-backed media such as the showcase strip, square logo, Open Graph preview, strip cover, and strip frames.
* Route HTML grew slightly where status copy, captions, and data attributes make performance/privacy state visible.
* CSS bundle sizes are mostly stable; small press CSS growth is accepted for high-byte preview status styling.

Deferred launch blockers:

* Full automated image pipeline remains deferred to a later media pipeline session.
* Broad release of conditional showcase media remains blocked until source, rights, attribution, metadata, accessibility, privacy, and budget evidence closes.
* Exact brand webfont delivery remains deferred unless a later privacy review approves local self-hosting and byte budgets.

***

## Task Log

### 2026-06-02 - Session Start

**Environment verified**:

* [x] Prerequisites confirmed.
* [x] Tools available.
* [x] Directory structure ready.
* [x] Package scope resolved to `public-website`.

***

### Task T001 - Verify Phase 16 Session 02 Prerequisites

**Started**: 2026-06-02 03:10 **Completed**: 2026-06-02 03:10 **Duration**: 4 minutes

**Notes**:

* Confirmed Phase 16 Session 02 PRD exists and is scoped to `public-website`.
* Confirmed Phase 16 Session 01 validation result is PASS.
* Confirmed public website package scripts exist for `typecheck`, `build`, and `check:links`.
* Confirmed launch images are present in `public-website/src/assets`.
* Confirmed required Node.js baseline is `26.2.0` or newer. The current shell is Node.js `24.14.0`, so final verification will use the verified baseline-compatible `npx -p node@26.2.0 -p npm@11.16.0` runner.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Recorded environment baseline and prerequisite evidence.

**BQC Fixes**:

* N/A - prerequisite and evidence task only.

***

### Task T002 - Inventory Assets, Scripts, Fonts, And CSS Cost

**Started**: 2026-06-02 03:10 **Completed**: 2026-06-02 03:11 **Duration**: 5 minutes

**Notes**:

* Inventoried source assets, public pass-through files, media registry keys, font references, browser script surfaces, and high-cost CSS/motion targets.
* Confirmed no remote font request is currently declared in source.
* Confirmed runtime JavaScript is limited to JSON-LD, mobile navigation, and skip-link accessibility behavior.
* Identified `showcase.heroesBanner` as the dominant source and built asset risk.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Added inventory sections for registry, fonts, scripts, and CSS cost surfaces.

**BQC Fixes**:

* N/A - inventory and evidence task only.

***

### Task T003 - Record Baseline Built Output Sizes

**Started**: 2026-06-02 03:11 **Completed**: 2026-06-02 03:12 **Duration**: 3 minutes

**Notes**:

* Recorded baseline total built bytes, `_astro` bytes, largest assets, largest route HTML files, largest CSS outputs, and the absence of emitted JavaScript files.
* Added placeholders for fixed issues, accepted tradeoffs, and deferred launch blockers to resolve after the final build.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Added baseline output-size details and payload tracking placeholders.

**BQC Fixes**:

* N/A - payload evidence task only.

***

### Task T004 - Tune Website Media Registry Metadata

**Started**: 2026-06-02 03:12 **Completed**: 2026-06-02 03:15 **Duration**: 3 minutes

**Notes**:

* Added typed registry metadata for responsive widths, default sizes, image quality, fit intent, and per-asset performance notes.
* Kept `showcase.strip` linked to `showcase.stripCover` for reduced-motion fallback behavior.
* Kept `showcase.heroesBanner` lazy, standard priority, conditional, and capped below its 3168px original for preview use.
* Verified the public website typecheck passes under the required Node.js 26.2.0/npm 11.16.0 runner.

**Files Changed**:

* `public-website/src/lib/media.ts` - Added `WebsiteMediaQuality`, `WebsiteMediaFit`, responsive output defaults, default sizes, quality policy, fit policy, and high-byte asset notes.

**BQC Fixes**:

* Contract alignment: Ran package typecheck after extending the registry contract and confirmed consumers still compile (`public-website/src/lib/media.ts`).

***

### Task T005 - Harden Optimized Media Rendering Defaults

**Started**: 2026-06-02 03:15 **Completed**: 2026-06-02 03:16 **Duration**: 4 minutes

**Notes**:

* Updated `OptimizedMedia` to consume registry defaults for responsive widths, sizes, quality, and fit.
* Added width normalization so generated widths are positive, unique, sorted, and capped to the intrinsic source width.
* Added reduced-motion fallback width normalization so fallback images cannot request larger-than-source variants.
* Kept non-empty alt enforcement and added media priority/source-byte data attributes for local output inspection.
* Replaced hard-coded CSS `object-fit: cover` with the resolved media fit policy.
* Verified public website typecheck passes under the required Node.js 26.2.0/npm 11.16.0 runner.

**Files Changed**:

* `public-website/src/components/media/OptimizedMedia.astro` - Centralized responsive rendering defaults, sanitized widths, fallback handling, and object-fit behavior.

**BQC Fixes**:

* Contract alignment: Component props now align with the extended registry contract and typecheck passes.
* Failure path completeness: Empty alt text continues to throw a clear build-time error instead of silently emitting inaccessible media.
* Accessibility and platform compliance: Alt enforcement and reduced-motion fallback handling remain centralized.

***

### Task T006 - Confirm Public Pass-Through Asset Policy

**Started**: 2026-06-02 03:16 **Completed**: 2026-06-02 03:17 **Duration**: 2 minutes

**Notes**:

* Confirmed `public-website/public` contains only favicon, robots, manifest, and press policy files.
* Updated the press pass-through README with the current public inventory.
* Recorded that no content image, showcase preview, Open Graph fallback, or press download intentionally bypasses Astro optimization for this launch session.

**Files Changed**:

* `public-website/public/press/README.md` - Added current pass-through inventory and explicit no-bypassed-content-image policy.

**BQC Fixes**:

* N/A - policy documentation task only.

***

### Task T007 - Document Font Strategy And Launch Performance Constraints

**Started**: 2026-06-02 03:17 **Completed**: 2026-06-02 03:18 **Duration**: 3 minutes

**Notes**:

* Documented that no external font request is declared and launch fonts use local/system fallback stacks.
* Documented the rule for future exact-brand typography: self-host locally, record license and byte budget, and keep third-party font fetching disabled unless separately approved.
* Documented public asset policy, image optimization choke point, high-byte showcase constraint, no emitted static-presentation JavaScript bundle, and no telemetry/hosted-service boundary.
* Replaced stale local Node path validation examples with the verified Node.js 26.2.0/npm 11.16.0 `npx` runner commands.

**Files Changed**:

* `public-website/README_public-website.md` - Added launch performance, font, static-boundary, and validation command guidance.

**BQC Fixes**:

* N/A - documentation task only.

***

### Task T008 - Review Mobile Navigation Script Lifecycle

**Started**: 2026-06-02 03:18 **Completed**: 2026-06-02 03:19 **Duration**: 4 minutes

**Notes**:

* Kept mobile navigation JavaScript because it controls menu accessibility state, Escape handling, outside-click dismissal, viewport breakpoint reset, and page cache reset.
* Added an `AbortController` for acquired event listeners.
* Added cancellation for pending focus `requestAnimationFrame` work and transition timers.
* Preserved back-forward cache behavior by aborting listeners only on non-persisted `pagehide` exits.
* Verified public website typecheck passes under the required Node.js 26.2.0/npm 11.16.0 runner.

**Files Changed**:

* `public-website/src/components/navigation/MobileNavigation.astro` - Added abortable listeners, transient work cleanup, and page lifecycle handling.

**BQC Fixes**:

* Resource cleanup: Timers, focus frames, and event listeners now have explicit cleanup paths.
* State freshness on re-entry: `pageshow` continues to reset the menu to closed state.
* Duplicate action prevention: Existing transition lock remains in place for repeated toggle clicks.
* Accessibility and platform compliance: Focus restoration, Escape close behavior, and aria-expanded/aria-label updates remain intact.

***

### Task T009 - Tune First-Viewport Brand Media Usage

**Started**: 2026-06-02 03:19 **Completed**: 2026-06-02 03:20 **Duration**: 3 minutes

**Notes**:

* Reduced hero brand mark generated widths to 96px and 160px variants.
* Matched hero brand mark `sizes` to the actual desktop, tablet, and mobile rendered widths.
* Switched the mark to `fit="contain"` to avoid crop/distortion risk.
* Reduced first-viewport mark shadow and scanline opacity while preserving the Cyber-Tactical direction.
* Verified public website typecheck passes under the required Node.js 26.2.0/npm 11.16.0 runner.

**Files Changed**:

* `public-website/src/components/marketing/HeroCockpit.astro` - Tuned brand mark loading, widths, sizes, fit, and decorative scan/shadow cost.

**BQC Fixes**:

* Contract alignment: Hero media props align with the optimized media component contract and typecheck passes.
* Accessibility and platform compliance: Existing reduced-motion media query still disables the terminal scan animation.

***

### Task T010 - Tune Press Asset Previews

**Started**: 2026-06-02 03:20 **Completed**: 2026-06-02 03:21 **Duration**: 4 minutes

**Notes**:

* Added per-preview width sets for brand marks, Open Graph preview, showcase previews, and the high-byte operator lineup.
* Capped `showcase.heroesBanner` press preview output at 1280px instead of allowing larger registry variants.
* Added explicit contain fit for brand previews and cover fit for showcase previews.
* Kept provenance captions visible and added explicit reduced-motion fallback copy for the animated showcase strip preview.
* Verified public website typecheck passes under the required Node.js 26.2.0/npm 11.16.0 runner.

**Files Changed**:

* `public-website/src/components/marketing/PressAssetGrid.astro` - Added preview sizing helpers, high-byte classing, fit selection, and reduced-motion caption context.

**BQC Fixes**:

* Contract alignment: Press preview props align with `OptimizedMedia` and typecheck passes.
* Accessibility and platform compliance: Conditional preview status, provenance captions, and reduced-motion fallback context remain visible in the press card content.

***

### Task T011 - Review Press Asset Descriptors And Launch Blockers

**Started**: 2026-06-02 03:21 **Completed**: 2026-06-02 03:22 **Duration**: 3 minutes

**Notes**:

* Updated conditional press status label to `conditional preview`.
* Made unavailable download language explicitly identify the launch blocker.
* Updated operator lineup copy to call out the conditional high-byte preview and 2994468-byte source.
* Confirmed all press downloads remain unavailable until pass-through evidence is complete.
* Verified public website typecheck passes under the required Node.js 26.2.0/npm 11.16.0 runner.

**Files Changed**:

* `public-website/src/data/company.ts` - Clarified press preview status labels, download blocker copy, and high-byte operator lineup notes.

**BQC Fixes**:

* Contract alignment: Press descriptors continue to satisfy their TypeScript contract and typecheck passes.

***

### Task T012 - Trim Global Decorative CSS Cost

**Started**: 2026-06-02 03:22 **Completed**: 2026-06-02 03:24 **Duration**: 5 minutes

**Notes**:

* Reduced global shadow token intensity and panel shadow spread.
* Reduced body, backdrop, and fixed glow gradient opacity and size.
* Removed the global scanline animation and pulsing status-dot animation.
* Removed the fixed-glow blur filter.
* Adjusted display font fallback ordering while keeping local/system-only font behavior and no remote font requests.
* Confirmed no `@font-face`, Google Fonts, remote font URL, preconnect, or external font stylesheet is declared.

**Files Changed**:

* `public-website/src/styles/global.css` - Trimmed global gradients, shadows, blur, and continuous animation cost while preserving static tactical context.

**BQC Fixes**:

* Accessibility and platform compliance: Reduced-motion users still receive disabled animation behavior, and default users no longer receive the page-wide continuous global scanline or pulse animation.

***

### Task T013 - Review Skip-Link Script

**Started**: 2026-06-02 03:24 **Completed**: 2026-06-02 03:25 **Duration**: 3 minutes

**Notes**:

* Kept the skip-link script because it provides keyboard focus transfer to the main content target.
* Added an abortable click listener and pagehide cleanup for non-persisted page exits.
* Added a guarded hash update with a location hash fallback.
* Confirmed no runtime network API, storage API, analytics, beacon, or hosted behavior was introduced.
* Verified public website typecheck passes under the required Node.js 26.2.0/npm 11.16.0 runner.

**Files Changed**:

* `public-website/src/components/navigation/SkipLink.astro` - Added abortable listener cleanup and guarded hash updates.

**BQC Fixes**:

* Resource cleanup: Skip-link event listeners now have an explicit cleanup path on real page exits.
* Failure path completeness: Hash update failure falls back to `window.location.hash`.
* Accessibility and platform compliance: Main-content focus behavior remains intact for keyboard users.

***

### Task T014 - Review Package Scripts And Dependency Surface

**Started**: 2026-06-02 03:25 **Completed**: 2026-06-02 03:26 **Duration**: 3 minutes

**Notes**:

* Confirmed `public-website/package.json` scripts cover `typecheck`, `build`, and `check:links`.
* Confirmed package engine remains Node.js `>=26.2.0`.
* Confirmed public website production dependencies remain Astro integrations, Astro, and Sharp only.
* Confirmed no package file changes were made and no production dependency, telemetry tool, analytics SDK, or hosted-service dependency was added.
* Root lockfile contains pre-existing telemetry/analytics-related dependency names from other dependency trees and packages; no public website dependency surface was changed in this session.

**Files Changed**:

* None - package script and dependency surface review only.

**BQC Fixes**:

* External dependency resilience: Avoided adding any new production dependency or telemetry package for launch performance review.

***

### Task T015 - Record Final Size Comparison

**Started**: 2026-06-02 03:26 **Completed**: 2026-06-02 03:28 **Duration**: 7 minutes

**Notes**:

* Generated `public-website/src/assets/showcase/heroes-banner-preview.webp`, a 1920x815 WebP launch derivative from the tracked operator lineup source.
* Updated `showcase.heroesBanner` registry metadata to use the 168720-byte derivative while preserving provenance back to the 2994468-byte source.
* Rebuilt the public website successfully under the required Node.js 26.2.0/npm 11.16.0 runner.
* Final total built bytes: 4692665, down from the 8691226-byte baseline.
* Final `_astro` bytes: 3154056, down from the 7170262-byte baseline.
* Final emitted JavaScript files: none.

Final output comparison:

| Area                                   | Baseline                                      | Final                                                   | Change                               |
| -------------------------------------- | --------------------------------------------- | ------------------------------------------------------- | ------------------------------------ |
| `public-website/dist` bytes            | 8691226                                       | 4692665                                                 | -3998561                             |
| `public-website/dist` disk size        | 8.7M                                          | 4.8M                                                    | -3.9M                                |
| `public-website/dist/_astro` bytes     | 7170262                                       | 3154056                                                 | -4016206                             |
| `public-website/dist/_astro` disk size | 7.0M                                          | 3.2M                                                    | -3.8M                                |
| Largest built asset                    | `heroes-banner.DdvYTajD.jpg` at 2994468 bytes | `factionos-strip.zIUdbvcc.webp` at 458090 bytes         | Hero JPEG source removed from output |
| Largest hero preview output            | 2994468-byte raw JPEG plus variants           | 168720-byte WebP source plus variants up to 97016 bytes | High-byte preview fixed              |
| Emitted JavaScript files               | 0                                             | 0                                                       | unchanged                            |

Largest final route HTML outputs:

| Bytes | Path                                      |
| ----- | ----------------------------------------- |
| 92874 | `public-website/dist/security/index.html` |
| 88718 | `public-website/dist/index.html`          |
| 81760 | `public-website/dist/product/index.html`  |
| 77394 | `public-website/dist/faq/index.html`      |
| 69233 | `public-website/dist/features/index.html` |
| 61544 | `public-website/dist/press/index.html`    |

Largest final CSS outputs:

| Bytes | Path                                               |
| ----- | -------------------------------------------------- |
| 48855 | `public-website/dist/_astro/index.DGi2YZJz.css`    |
| 30018 | `public-website/dist/_astro/product.LBMcjKh5.css`  |
| 28977 | `public-website/dist/_astro/security.DnnLWtcX.css` |
| 19866 | `public-website/dist/_astro/features.CVZFmSZU.css` |
| 19562 | `public-website/dist/_astro/Shell.kLskuj4e.css`    |

**Files Changed**:

* `public-website/src/assets/showcase/heroes-banner-preview.webp` - Added launch WebP derivative for the operator lineup preview.
* `public-website/src/lib/media.ts` - Pointed `showcase.heroesBanner` at the launch derivative and updated source bytes, hash, and performance notes.
* `public-website/src/data/company.ts` - Documented that the press page uses the 168720-byte launch derivative for the conditional operator lineup preview.
* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Added final payload comparison and fixed/deferred payload records.

**BQC Fixes**:

* External dependency resilience: Used existing Sharp dependency through the local Node environment; no new dependency or runtime image service was added.
* Contract alignment: Media registry metadata and press copy now match the launch derivative actually used by the build.

***

### Task T016 - Verify Optimized Images In Built Output

**Started**: 2026-06-02 03:28 **Completed**: 2026-06-02 03:31 **Duration**: 6 minutes

**Notes**:

* Static built-output check confirmed only `heroes-banner-preview` files are emitted for the operator lineup; the original `heroes-banner.jpg` is not in `dist/_astro`.
* Static built-output check confirmed the hero mark emits 96w and 160w variants, `loading="eager"`, and `fetchpriority="high"`.
* Static built-output check confirmed the operator lineup emits 320w, 640w, 960w, and 1280w variants with no 1600w or 1920w preview variant.
* Static built-output check confirmed `showcase.strip` includes a motion image plus `showcase.stripCover` fallback image and reduced-motion CSS.
* Browser spot check against `astro preview` passed on home and press routes:
  * Hero mark completed loading, rendered at 86x86 CSS pixels, used `object-fit: contain`, and selected the 96w variant.
  * Operator lineup completed loading, used `heroes-banner-preview`, selected a generated WebP variant, and used `object-fit: cover`.
  * Normal motion displayed the animated strip image and hid the fallback.
  * Reduced-motion displayed the static strip-cover fallback and hid the motion image.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Added optimized image verification evidence.

**BQC Fixes**:

* Contract alignment: Browser output matched declared width, loading, fit, and fallback contracts.
* Accessibility and platform compliance: Reduced-motion fallback behavior was verified in Chromium.

***

### Task T017 - Run Public Website Typecheck

**Started**: 2026-06-02 03:31 **Completed**: 2026-06-02 03:32 **Duration**: 2 minutes

**Notes**:

* Ran `npx -y -p node@26.2.0 -p npm@11.16.0 npm --workspace @factionos/public-website run typecheck`.
* `astro sync && tsc --noEmit` passed.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Recorded typecheck evidence.

**BQC Fixes**:

* Contract alignment: Final media registry, Astro component, navigation script, and press descriptor types passed package typecheck.

***

### Task T018 - Run Public Website Build

**Started**: 2026-06-02 03:32 **Completed**: 2026-06-02 03:33 **Duration**: 3 minutes

**Notes**:

* Ran `npx -y -p node@26.2.0 -p npm@11.16.0 npm --workspace @factionos/public-website run build`.
* Astro built static output successfully.
* Build generated 31 pages.
* Optimized image generation completed with 26 variants.
* No server adapter or Cloudflare adapter was added.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Recorded build evidence.

**BQC Fixes**:

* Contract alignment: Final static build completed with the optimized media contract and launch derivative in place.

***

### Task T019 - Run Link And Static-Boundary Checker

**Started**: 2026-06-02 03:33 **Completed**: 2026-06-02 03:34 **Duration**: 1 minute

**Notes**:

* Ran `npx -y -p node@26.2.0 -p npm@11.16.0 npm --workspace @factionos/public-website run check:links`.
* Public website static checks passed with 31 routes and 2185 links.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Recorded link/static-boundary checker evidence.

**BQC Fixes**:

* Trust boundary enforcement: Static-boundary checker passed after script, link, and media changes.

***

### Task T020 - Confirm Encoding, Privacy Boundaries, And Readiness

**Started**: 2026-06-02 03:34 **Completed**: 2026-06-02 03:35 **Duration**: 3 minutes

**Notes**:

* ASCII scan over modified text files returned no non-ASCII matches.
* CRLF scan over modified text files returned no matches.
* Remote-font scan returned no `@font-face`, Google Fonts, gstatic, remote font URL, or local webfont file references.
* Built-output runtime boundary scan returned no `fetch(`, `navigator.sendBeacon`, `new WebSocket`, `new EventSource`, browser storage writes, or cookie writes.
* `check:links` already passed with 31 routes and 2185 links.
* Implementation notes contain baseline inventory, final size comparison, fixed/deferred payload decisions, optimized image verification, and command evidence.
* Binary image asset `public-website/src/assets/showcase/heroes-banner-preview.webp` is intentionally excluded from text encoding scans.

**Files Changed**:

* `.spec_system/specs/phase16-session02-performance-and-image-optimization/implementation-notes.md` - Recorded final readiness evidence.
* `.spec_system/specs/phase16-session02-performance-and-image-optimization/tasks.md` - Marked final task and completion checklist complete.

**BQC Fixes**:

* Trust boundary enforcement: Final static-boundary and built-output runtime API scans passed.
* Error information boundaries: No debug, stack, or secret-bearing runtime output was added.

***


---

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