spec - graph.rq

Idea	File	Status	Summary
auto_reframe	reqlan rq/extension/library/graph.rq		The graph should automatically fit to the viewport when the loaded node set changes — without requiring the user to click " Fit to view ". After each successful syncSlice, GraphCyController compares the sorted node-id set of the incoming slice with fittedNodeSetKey ( the set the viewport was last fitted to ). When they differ, finishRender triggers an automatic reframe via reframeToViewport. Triggers when any node is added or removed from the slice ( new neighbourhood, focus change, filter change that changes membership ). Does not trigger for metadata-only updates on the same node ids ( label, colour, isCenter flag, etc. ) — those keep the user's current pan / zoom. Does not trigger on requestLayout relayout when the node-id set is unchanged.
compound_graph	reqlan rq/extension/library/graph.rq		folder hierarchy is to be supported with compound layouts.
graph_cy_controller	reqlan rq/extension/library/graph.rq		the cytoscape object should use event driven patterns; lifecycle is documented here. GraphCyController in ["../../../packages/extension/webviews/shared/graph/graph-cy-controller.ts"] owns the cytoscape instance with inline lifecycle state ( idle, syncing, layouting, physics ). syncGeneration cancels stale layout callbacks when the slice changes mid-layout. Selection and drag-pinned positions are tracked in userPositionedNodes on the controller. syncSlice diffs elements ( add / remove / update the delta ) via ["../../../packages/extension/webviews/shared/graph/graph-cy-elements.ts"] so surviving nodes keep positions; requestLayout restarts the active algorithm and clears user pins. Pointer / selection wiring lives in ["../../../packages/extension/webviews/shared/graph/graph-cy-interactions.ts"]; compound hover / selection in ["../../../packages/extension/webviews/shared/graph/graph-cy-highlight.ts"]. Live physics is the custom simulation in ["../../../packages/extension/webviews/shared/graph/graph-physics.ts"]; one instance persists with the cytoscape instance and is paused / resumed, never rebuilt. Grabbing a node pins it in the running sim ( its live position keeps exerting forces ); release unpins with no restart and no snap. ResizeObserver debounces cy. resize ( ) and re-triggers a pending sync when the container gains size. Mount only while the graph container is visible and non-zero — do not keep cytoscape alive under display: none; WebGL init on a zero-size hidden container can break the host webview before messaging is attached. Viewport fitting per [reframe_view]; tracks lastSyncedNodeSetKey vs fittedNodeSetKey to drive [auto_reframe]. Label visibility per [graph_label_modes] / [graph_label_auto]: setLabelMode updates text-opacity from zoom ( and hover / drag force-opaque in auto ).
graph_cy_elements	reqlan rq/extension/library/graph.rq		syncGraphElements diffs the live cytoscape graph against the desired slice rather than remove-all / add-all on every sync. Surviving nodes keep positions; only added / removed / updated elements move. Mutable data fields ( label, color, flags ) can update without a structural relayout. per ["../../../packages/extension/webviews/shared/graph/graph-cy-elements.ts"].
graph_cytoscape	reqlan rq/extension/library/graph.rq		builds cytoscape elements and stylesheet from a generic node / edge slice. registers batch layout options ( fcose, cola, breadthfirst, circle, concentric, grid, random ) and seeds positions for new nodes. exposes CompoundBasis ( single-membership folder tree ) and GroupBasis ( flat multi-membership ) as grouping inputs. per ["../../../packages/extension/webviews/shared/graph/graph-cytoscape.ts"] and ["../../../packages/extension/webviews/shared/graph/graph-theme.ts"]. getLayoutConfig sets fit: false for initial ( mode = = = ' initial' ) batch layouts so [auto_reframe] owns the first viewport fit; relayout modes may still fit via the layout algorithm.
graph_label_auto	reqlan rq/extension/library/graph.rq	done	In Labels auto mode, visibility follows viewport zoom continuously rather than a hard cut. Below a low zoom threshold labels are fully hidden; above a slightly higher threshold they are fully opaque; between those thresholds opacity ramps briefly through a muted / semi-transparent phase ( GRAPH_LABEL_FADE_START → GRAPH_LABEL_FADE_END ). Hovered or dragged nodes remain fully opaque even when ambient auto opacity is low or zero. Zoom and Fit from [view_controls] / [reframe_view] must update this opacity on each paint or zoom event. Applies to Ideas Summary GraphCyController and HTML export canvas graph alike.
graph_label_modes	reqlan rq/extension/library/graph.rq	done	Every interactive graph should provide a Labels control that cycles auto ( default ), on, and off without changing graph membership. On forces full opacity; off hides all labels; auto follows [graph_label_auto]. Reset / default restore auto. Ideas Summary: control in ["../../../packages/extension/webviews/ideas-summary/components/GraphControls.svelte"], mode persisted via ["../module/ideas_summary/graphical_graph.rq".graph_ui_persistence]. HTML export: control in ["../../../packages/analytical/src/export/html-export-template.ts"] / ["../../../packages/analytical/src/export/html-export-assets.ts"]. Driven by the same viewport zoom as [view_controls].
graph_labels	reqlan rq/extension/library/graph.rq	done	Graph node labels must show the full idea name without character truncation. Wrapping is allowed; ellipsis truncation of display names is not. Shared contract for Ideas Summary ( cytoscape ) and HTML export ( canvas ); surface-specific wiring lives under consumers. [graph_label_modes] [graph_label_auto]
graph_library	reqlan rq/extension/library/graph.rq		Reusable cytoscape-based graph visualization library for force-directed and compound graphs. Provides a mount → sync slice → layout → optional live physics → destroy lifecycle with a simplified API. Implementation lives in ["../../../packages/extension/webviews/shared/graph/graph-cytoscape.ts"], ["../../../packages/extension/webviews/shared/graph/graph-cy-controller.ts"], ["../../../packages/extension/webviews/shared/graph/graph-cy-elements.ts"], ["../../../packages/extension/webviews/shared/graph/graph-cy-interactions.ts"], ["../../../packages/extension/webviews/shared/graph/graph-cy-highlight.ts"], ["../../../packages/extension/webviews/shared/graph/graph-physics.ts"], ["../../../packages/extension/webviews/shared/graph/graph-groups.ts"], and ["../../../packages/extension/webviews/shared/graph/graph-theme.ts"]. Ideas Summary re-exports the shared modules from ["../../../packages/extension/webviews/ideas-summary/lib/"] for backward-compatible import paths. Consumers pass a node / edge slice and sync options; the library owns the cytoscape instance, diffing, layout runs, and optional continuous physics.
graph_status_tag_filters	reqlan rq/extension/library/graph.rq	done	Status and tag graph filters are searchable checkbox dropdowns ( still a dropdown trigger; multi-select via checkboxes; OR within each field ). They must distinguish attribute absence from an empty declaration and from a literal unspecified value: - Not present — attribute key absent ( no `@status` / no `@tags` ) - Empty — attribute declared with no value ( `@status`, `@tags`, `@status ""`, bare flag ) - unspecified — literal authored value " unspecified " Do not invent unspecified for missing attributes in rollups, clusters, or filter options. Special options render differently from concrete values ( italic muted Not present; info-tint Empty; warning-tint unspecified ). Shared helpers live in ["../../../packages/analytical/src/core/filter-specials.ts"]. Surfaces: Ideas Summary SearchableCheckboxDropdown; HTML export SCD in ["../../../packages/analytical/src/export/html-export-assets.ts"].
layout_options	reqlan rq/extension/library/graph.rq		- user can select from a dropdown of layout options offered by cytoscape. js - user can select whether to use compound layouts ( where compound basis is based on the folder structure ) - compound basis should be flexible and expected as an input
layout_physics	reqlan rq/extension/library/graph.rq		defaults to force-directed layout ( fcose ) with animation on, but callers can select other options offered by cytoscape. js. a toggle leaves layout animation and live physics on for force-directed layouts instead of settling immediately. live physics is the custom obsidian-style simulation in ["../../../packages/extension/webviews/shared/graph/graph-physics.ts"] ( force core: ["../../../packages/analytical/src/graph/physics-core.js"] ), regardless of which force-directed batch layout produced the initial settle. forces are central gravity toward the centroid, linear edge springs, and inverse-square node repulsion; every childless node participates, including disconnected orphans. group container constraints live in ["../../../packages/extension/webviews/shared/graph/graph-groups.ts"]: each leaf carries data ( ' groupIds' ); disjoint groups are pushed apart after batch cola / fcose and during Animate; groups that share a member ( multi-membership, e. g. tags ) may overlap around the shared node. the simulation is deterministic ( no randomness ) and converges slowly over tens of seconds, then sleeps; interactions wake it instead of restarting it. dragging pins the held node while the sim keeps running around it; release rejoins the node at rest with no snap; clicks never disturb the sim. cycling the Animate toggle pauses and resumes the same simulation state, so it converges to the same attractor as leaving it on.
manual_reframe	reqlan rq/extension/library/graph.rq		Users can explicitly reframe the viewport when pan / zoom has moved the graph off-screen or they want to see the whole neighbourhood again. - " Fit to view " control in ["../../../packages/extension/webviews/ideas-summary/components/GraphControls.svelte"] dispatches to GraphView → GraphCyController. reframeToViewport ( ). - " Fit to view " control in ["../../../packages/extension/webviews/activity-bar/components/MiniGraphCanvas.svelte"] calls the same API on the mini-graph controller. Every graph surface that mounts GraphCyController should expose this control.
physics_options	reqlan rq/extension/library/graph.rq		- user can select from a dropdown of physics options offered by cytoscape. js - the options for the physics should be exposed to the user in a menu too. - user can select whether to use live physics / animation - live physics uses the custom graph-physics simulation; cola remains selectable as a batch layout in the layout dropdown - Ideas Summary exposes layout, live-physics, and force sliders in ["../../../packages/extension/webviews/ideas-summary/components/GraphControlPanel.svelte"]
reframe_animation	reqlan rq/extension/library/graph.rq		The first reframe on a controller mount is instant ( synchronous cy. fit + cy. center ) so the graph appears immediately on first paint. Every subsequent reframe — automatic ( [auto_reframe] ) or manual ( [manual_reframe] ) — animates pan and zoom smoothly over GRAPH_REFRAME_ANIMATION_MS using cytoscape. animate ( { fit, easing: ' ease-out-cubic ' } ). Callers may pass `reframeToViewport({ animate: false })` to force an instant reframe. Initial batch layouts use fit: false ( see [graph_cytoscape] ) so the controller owns the first fit and later animated handoffs are not double-applied.
reframe_view	reqlan rq/extension/library/graph.rq		Shared viewport behaviour for every surface that mounts GraphCyController ( Ideas Summary graph tab, activity bar mini graph, and future consumers ). Implementation: reframeGraphToViewport and GraphCyController. reframeToViewport in ["../../../packages/extension/webviews/shared/graph/graph-cy-controller.ts"]. [manual_reframe] [auto_reframe] [reframe_animation] Constants: GRAPH_VIEWPORT_PADDING ( 36 px padding around the element bounding box ), GRAPH_REFRAME_ANIMATION_MS ( 400 ms animated transition ). Reframes resize the cytoscape container first, then fit all elements and centre the camera. Does not clear selection, centreId, user-pinned drag positions, or live physics state — viewport only.
technology	reqlan rq/extension/library/graph.rq		uses cytoscape. js for the graph layout and canvas. cytoscape-fcose provides the batch force-directed settle; cytoscape-cola is available as a batch layout option. continuous ( " live " ) physics is a custom simulation in ["../../../packages/extension/webviews/shared/graph/graph-physics.ts"]. the controller initialises cytoscape with Canvas 2 D only ( pixelRatio 1, no WebGL ) so webviews do not break on unresolved CSS variables. Body prose with inline parentheses must parse per ["../../../reqlan rq/language/syntax.rq".lists] and ["../../../reqlan rq/language/syntax.rq".round_brackets].
view_controls	reqlan rq/extension/library/graph.rq		pan, zoom, and drag repositioning are supported on the canvas. zoom range is wide rather than tightly capped so users can inspect fine detail or see the whole neighbourhood. [reframe_view] fits and centres the camera on the graph bounding box without changing node positions or restarting layout / physics. Zoom and Fit must continuously drive [graph_label_auto] opacity when Labels is in auto mode.
webview_threading	reqlan rq/extension/library/graph.rq		VS Code webviews run JavaScript on a single main thread, like a browser tab. Heavy synchronous work — cytoscape layout iterations, large element builds, unbounded loops — blocks UI updates until it finishes. Layout iteration count scales with node count ( capped ) rather than running unbounded defaults. Do not restart layout synchronously on layoutstop; hand off to the graph-physics simulation, which integrates one step per requestAnimationFrame instead of blocking.

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