--- id: "codex://object/codex-archive-system-v3-5-control-surface-notes" archive_id: "codex-archive-system-v3-5-control-surface-notes" slug: "codex-archive-system-v3-5-control-surface-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-5-control-surface-notes/" type: "codex" title: "Codex Archive System V3.5 Control Surface Notes" summary: "v3.5 unifies feed search and filter controls across desktop and mobile, and tightens header conceal/reveal rhythm." date_published: "2026-03-09T03:08:00.000Z" date_modified: "2026-03-09T03:08:00.000Z" status: "published" visibility: "public" language: "en-US" axes: {} themes: - "systems" - "architecture" - "methodology" - "signal" - "observation" constellations: - "Cascade Psalms" tags: - "systems" - "architecture" - "methodology" - "signal" - "observation" keywords: - "Codex" - "systems" - "architecture" - "methodology" - "signal" - "observation" - "Cascade Psalms" author: id: "nathan-davis" name: "Nathan Davis" designation: "Archive Operator" role: "Archive Operator" handle: "@nathandavis" avatar: "/media/people/nathan-davis.jpg" bio: "Designer, builder, and curator of the Codex Archive." contributors: - id: "nathan-davis" name: "Nathan Davis" designation: "Archive Operator" role: "Archive Operator" handle: "@nathandavis" avatar: "/media/people/nathan-davis.jpg" bio: "Designer, builder, and curator of the Codex Archive." relations: - kind: "related" target: "codex://object/codex-archive-system-v3-4-image-experience-notes" slug: "codex-archive-system-v3-4-image-experience-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-4-image-experience-notes/" - kind: "related" target: "codex://object/codex-archive-system-v3-3-modest-table-notes" slug: "codex-archive-system-v3-3-modest-table-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-3-modest-table-notes/" - kind: "related" target: "codex://object/codex-archive-system-v3-2-fragment-feed-notes" slug: "codex-archive-system-v3-2-fragment-feed-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-2-fragment-feed-notes/" - kind: "related" target: "codex://object/codex-archive-system-v3-1-build-notes" slug: "codex-archive-system-v3-1-build-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-1-build-notes/" - kind: "related" target: "codex://object/codex-archive-system-v3-plus-notes" slug: "codex-archive-system-v3-plus-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-plus-notes/" - kind: "related" target: "codex://object/on-object-oriented-archives" slug: "on-object-oriented-archives" url: "https://ndcodex.com/objects/on-object-oriented-archives/" - kind: "related" target: "codex://object/cities-built-on-ruin-reminiscence" slug: "cities-built-on-ruin-reminiscence" url: "https://ndcodex.com/objects/cities-built-on-ruin-reminiscence/" - kind: "related" target: "codex://object/bezalel-the-designated-hand" slug: "bezalel-the-designated-hand" url: "https://ndcodex.com/objects/bezalel-the-designated-hand/" - kind: "dependency" target: "codex://object/codex-archive-system-v3-4-image-experience-notes" slug: "codex-archive-system-v3-4-image-experience-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-4-image-experience-notes/" - kind: "dependency" target: "codex://object/codex-archive-system-v3-3-modest-table-notes" slug: "codex-archive-system-v3-3-modest-table-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-3-modest-table-notes/" - kind: "connection" target: "codex://object/codex-archive-system-v3-4-image-experience-notes" slug: "codex-archive-system-v3-4-image-experience-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-4-image-experience-notes/" role: "previous version" display: "feature" - kind: "connection" target: "codex://object/codex-archive-system-v3-6-reading-surface-notes" slug: "codex-archive-system-v3-6-reading-surface-notes" url: "https://ndcodex.com/objects/codex-archive-system-v3-6-reading-surface-notes/" role: "next update" display: "inline" media: [] --- v3.5 extends [Codex Archive System v3.4 Image Experience Notes](/objects/codex-archive-system-v3-4-image-experience-notes). Use v3.4 as viewing-surface context and v3.5 for current feed-control and header behavior. v3.5 is the control-surface release. Operator value prop: - Search, filters, and header concealment now behave like one coherent reading surface instead of separate mobile and desktop exceptions. Work chunks and wins: 1. Feed controls now collapse the same way on desktop and mobile Value prop: There is one operator gesture for opening the filter surface, regardless of viewport. - Promote the existing `Search & filters` toggle into the desktop feed surface. - Keep inactive controls collapsed by default. - Auto-open the panel when a search, type, or theme filter becomes active. - Let operators collapse the panel again without losing state. 2. Collapsed controls now reflect active state Value prop: A closed panel can still report what it is doing. - Show a compact active count when the control surface is collapsed. - Surface a short summary of active search/filter state in the collapsed bar. - Keep the `Clear` action and full active-filter line inside the open panel. 3. Header conceal/reveal motion was tightened Value prop: The top edge gets out of the way faster, with less drag. - Smooth header shadow and top-edge veil intensity from scroll progress instead of threshold jumps. - Reduce the hide trigger and sharpen the transform easing so the header tucks upward more quickly. - Keep a narrow residual strip in view so the page retains top-edge weight without a full chrome bar. 4. Content now fades under the top edge with lighter pressure Value prop: The reading field softens into the boundary instead of hitting a hard cut. - Place the top-edge veil under the sticky header and above the scrolling content. - Lighten the fade so it supports reading depth without feeling smoky. - Keep the effect tied to scroll state, not always-on decoration. No schema expansion is proposed in v3.5. No new object type is proposed in v3.5.