feat: perspectives Go layer -- the O(1) reference-architecture entity (goal 0095 slice 1, ADR-0041) - #224
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…ce 1, ADR-0041) Perspective per ADR-0041's shape (explicit MemberCardIDs/MemberLinkIDs, no DeletedAt -- delete is immediate, not soft). Pure helpers: AncestorChain (ancestry-closure computation), DescendantsAndSelf (removal cascade), FilterByPerspective (membership + the link-renders-iff-self-and-both-endpoints rule), DiffPerspectives (set difference, order-stable). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FW5GkkAG8du7tNdYLk2zSd
…ice 1) wails3 generate bindings picks up AtlasService's new Perspective CRUD/ membership methods and the atlas.Perspective type. One mechanical frontend fix rides along: AtlasSessionState's new required activePerspectiveID field means the one existing SetAtlasSession call site needs it too (always "" here -- the switcher UI is a later slice); no behavior change. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01FW5GkkAG8du7tNdYLk2zSd
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The Perspective entity per ADR-0041: named, ordered views over one space's LIVE card set — member sets for cards AND links (a target-state connection between two existing systems must not leak into Current), ancestry closure on add, removal cascade, authoring-while-active joins the active perspective, purge strips member sets in the existing tombstone pass, export/import round-trips with unknown-member filtering, session carries the active id with degrade-on-read. Default 'everything' view = absence of any record: zero perspectives, zero behavior change, zero migration.
Pure helpers (FilterByPerspective with the link-visibility rule, DiffPerspectives as set difference) + 41 tests across the layers; Card/Note untouched so every seed fingerprint stays byte-identical. UI lands in slice 2 (switcher absorbs the Lens per ADR-0041's naming rule); the seeded three-perspective example in slice 3.
Goal: docs/goals/0095-atlas-perspectives.md · ADR: docs/adr/0041.
🤖 Generated with Claude Code
https://claude.ai/code/session_01FW5GkkAG8du7tNdYLk2zSd