> 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/phase02-session05-battlefield-asset-and-public-demo-parity/implementation_summary.md).

# Implementation Summary

**Session ID**: `phase02-session05-battlefield-asset-and-public-demo-parity` **Package**: Cross-cutting (`apps/web`, `public-demo`, docs, scripts) **Completed**: 2026-05-29 **Duration**: 2-4 hours

***

## Overview

This session validated and documented parity between the app battlefield asset set and the standalone public demo. It added a deterministic asset check, kept the demo's synthetic battlefield behavior and offline support aligned with the app contract, updated stable docs, and verified that the public demo remained a no-build artifact with no workspace imports.

***

## Deliverables

### Files Created

| File                                                                                                      | Purpose                                                                                        | Lines |
| --------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- | ----- |
| `scripts/check-battlefield-assets.mjs`                                                                    | Deterministic app/demo asset parity, service worker precache, byte-budget, and boundary checks | \~180 |
| `.spec_system/specs/phase02-session05-battlefield-asset-and-public-demo-parity/IMPLEMENTATION_SUMMARY.md` | Session closeout summary                                                                       | \~80  |

### Files Modified

| File                                                                                    | Changes                                                                                        |
| --------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- |
| `package.json`                                                                          | Added the root `battlefield:check` command and bumped the patch version                        |
| `scripts/README_scripts.md`                                                             | Documented the new parity check command                                                        |
| `tests/e2e/support/browserGuards.ts`                                                    | Strengthened asset request failure reporting                                                   |
| `public-demo/index.html`                                                                | Aligned battlefield state labels, fallback behavior, selection clearing, and limitation copy   |
| `public-demo/sw.js`                                                                     | Updated or verified the precache list and cache version behavior                               |
| `tests/e2e/public-demo.e2e.ts`                                                          | Extended coverage for asset loading, selection, fallbacks, offline reload, and limitation copy |
| `tests/e2e/app.e2e.ts`                                                                  | Confirmed app battlefield loading and visible state expectations                               |
| `public-demo/README_public-demo.md`                                                     | Documented demo battlefield behavior and constraints                                           |
| `public-demo/docs_public-demo/validation.md`                                            | Added parity and offline validation steps                                                      |
| `public-demo/docs_public-demo/maintenance.md`                                           | Recorded parity check usage after asset changes                                                |
| `docs/public-demo-code-sharing.md`                                                      | Clarified no-import parity maintenance rules                                                   |
| `docs/battlefield.md`                                                                   | Updated app/demo parity and validation guidance                                                |
| `docs/media-assets.md`                                                                  | Confirmed asset measurements and validation references                                         |
| `.spec_system/specs/phase02-session05-battlefield-asset-and-public-demo-parity/spec.md` | Marked the session complete                                                                    |
| `.spec_system/PRD/phase_02/PRD_phase_02.md`                                             | Marked Session 05 complete and updated phase progress                                          |
| `.spec_system/state.json`                                                               | Cleared the current session and recorded completion                                            |

***

## Technical Decisions

1. **Explicit asset parity checks**: The session used a deterministic Node script rather than relying only on browser inspection so drift can fail fast at the repo root.
2. **Standalone demo boundary**: The public demo stayed as plain browser code with synthetic data and no workspace imports to preserve no-build compatibility.

***

## Test Results

| Metric   | Value            |
| -------- | ---------------- |
| Tests    | 5 command groups |
| Passed   | 5                |
| Coverage | N/A              |

***

## Lessons Learned

1. Asset drift is easier to catch when the expected app and demo paths are treated as explicit project data.
2. Offline demo validation needs a fresh browser context and a prior online visit to exercise cache behavior reliably.

***

## Future Considerations

Items for future sessions:

1. Keep the parity check and demo docs updated whenever the battlefield asset set changes.
2. Re-run the public demo offline flow after any service worker or shell asset update.

***

## Session Statistics

* **Tasks**: 20 completed
* **Files Created**: 2
* **Files Modified**: 14+
* **Tests Added**: 2
* **Blockers**: 0 resolved


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