> 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/phase23-session02-ranking-and-presentation-selectors/implementation_summary.md). # Implementation Summary **Session ID**: `phase23-session02-ranking-and-presentation-selectors` **Package**: apps/web **Completed**: 2026-07-05 **Duration**: 0.5 hours *** ## Overview Session 02 extended the pure Legion camp helper with Champion Mode ranking and presentation selectors. The web game layer can now rank and trim scanner camps by roster size, selected context, severity tier, HP, entrenchment, timestamps, and stable ids while keeping the full camp census available to later Quest Board and battlefield sessions. *** ## Deliverables ### Files Created | File | Purpose | Lines | | ---- | ------------------------------------------------------- | ----- | | None | Session 02 extended existing web helper and test files. | 0 | ### Files Modified | File | Changes | | ------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | `apps/web/src/lib/legionCamps.ts` | Added roster modes and visible limits, selected-sector resolution, entrenched presentation metadata, deterministic ranking, visible trimming, timestamp normalization, and cloned output records. | | `apps/web/tests/legionCamps.test.ts` | Added focused coverage for visible limits, selected-context priority, unmappable fallback, lower entrenchment, timestamp fallback, stable camp-id tie-breaking, muted/edge metadata, and input immutability. | | `.spec_system/specs/phase23-session02-ranking-and-presentation-selectors/tasks.md` | Marked all 16 planned tasks complete. | | `.spec_system/specs/phase23-session02-ranking-and-presentation-selectors/implementation-notes.md` | Recorded task-by-task implementation evidence and verification notes. | | `.spec_system/specs/phase23-session02-ranking-and-presentation-selectors/code-review.md` | Recorded review result as RESOLVED and the validation fix addendum. | | `.spec_system/specs/phase23-session02-ranking-and-presentation-selectors/security-compliance.md` | Recorded security PASS and GDPR N/A. | | `.spec_system/specs/phase23-session02-ranking-and-presentation-selectors/validation.md` | Recorded validation PASS evidence. | *** ## Technical Decisions 1. **Extend the existing selector**: Kept Champion Mode ranking in `rankVisibleLegionCamps` instead of adding a second selector, so later reducer and battlefield sessions have one pure camp presentation API. 2. **Selected context is opportunistic**: Sector priority applies only when an explicit sector id, safe sector key, or file path maps to existing sector data; otherwise ranking falls back deterministically. 3. **Presentation metadata does not mutate truth**: Entrenched camps expose muted and edge-placement metadata while preserving `entrenchedScans`, HP, tier, issue ids, and sector data unchanged. *** ## Test Results | Metric | Value | | ------------------ | --------------------------------------- | | Focused Tests | 15 | | Focused Passed | 15 | | Full Suite Tests | 3223 | | Full Suite Passed | 3222 | | Full Suite Skipped | 1 | | Failed | 0 | | Coverage | Not reported by configured test command | *** ## Lessons Learned 1. The existing sector id and safe-label helpers were sufficient for selected-context ranking without importing store or UI state. 2. Entrenchment can be handled as ranking and presentation metadata now, leaving rendering decisions to Session 06. *** ## Future Considerations Items for future sessions: 1. Fold scanner snapshots into `GameProjection` in Session 03 using the existing camp reconciliation and ranking helpers. 2. Keep persistence boundaries aggregate-only in Session 04 so trimmed presentation lists never replace the full camp census. 3. Use the selector metadata for Quest Board focus and battlefield camp rendering in Sessions 05 and 06. *** ## Session Statistics * **Tasks**: 16 completed * **Files Created**: 0 implementation files * **Files Modified**: 7 session deliverable and evidence files * **Tests Added**: 3 focused ranking-selector cases * **Blockers**: 0 resolved --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase23-session02-ranking-and-presentation-selectors/implementation_summary.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.