Feature: Visualizer UI improvements and related project file changes

Makefile

@@ -50,7 +50,7 @@ docker-build:
 docker-run:
 	docker run --rm -v $(PROJECT_DIR):/app --network="host" $(DOCKER_IMAGE) examples/function_minimization/initial_program.py examples/function_minimization/evaluator.py --config examples/function_minimization/config.yaml --iterations 1000
 
-# Run the lm-eval benchmark
-.PHONY: lm-eval
-lm-eval:
-	$(PYTHON) scripts/lm_eval/lm-eval.py
+# Run the visualization script
+.PHONY: visualizer
+visualizer:
+	$(PYTHON) scripts/visualizer.py --path examples/

README.md

@@ -137,9 +137,21 @@ The script in `scripts/visualize.py` allows you to visualize the evolution tree
 # Install requirements
 pip install -r scripts/requirements.txt
 
-# Start the visualization web server
+# Start the visualization web server and have it watch the examples/ folder
 python scripts/visualizer.py
+
+# Start the visualization web server with a specific checkpoint
+python scripts/visualizer.py --path examples/function_minimization/openevolve_output/checkpoints/checkpoint_100/
 ```
+
+In the visualization UI, you can
+- see the branching of your program evolution in a network visualization, with node radius chosen by the program fitness (= the currently selected metric),
+- see the parent-child relationship of nodes and click through them in the sidebar (use the yellow locator icon in the sidebar to center the node in the graph),
+- select the metric of interest (with the available metric choices depending on your data set),
+- highlight nodes, for example the top score (for the chosen metric) or the MAP-elites members,
+- click nodes to see their code and prompts (if available from the checkpoint data) in a sidebar,
+- in the "Performance" tab, see their selected metric score vs generation in a graph
+
 ![OpenEvolve Visualizer](openevolve-visualizer.png)
 
 ### Docker

pyproject.toml

@@ -17,6 +17,7 @@ dependencies = [
     "pyyaml>=6.0",
     "numpy>=1.22.0",
     "tqdm>=4.64.0",
+    "flask",
 ]
 
 [project.optional-dependencies]

scripts/static/js/graph.js

@@ -52,6 +52,7 @@ export function updateGraphNodeSelection() {
         .attr('stroke', d => selectedProgramId === d.id ? 'red' : '#333')
         .attr('stroke-width', d => selectedProgramId === d.id ? 3 : 1.5)
         .classed('node-selected', d => selectedProgramId === d.id);
+    updateGraphEdgeSelection(); // update edge highlight when node selection changes
 }
 
 export function getNodeColor(d) {
@@ -104,6 +105,9 @@ export function selectProgram(programId) {
         }
         nodeElem.classed("node-hovered", false);
     });
+    // Dispatch event for list view sync
+    window.dispatchEvent(new CustomEvent('node-selected', { detail: { id: programId } }));
+    updateGraphEdgeSelection(); // update edge highlight on selection
 }
 
 let svg = null;
@@ -252,6 +256,7 @@ function renderGraph(data, options = {}) {
         node
             .attr("cx", d => d.x)
             .attr("cy", d => d.y);
+        updateGraphEdgeSelection(); // update edge highlight on tick
     });
 
     // Intelligent zoom/pan
@@ -309,6 +314,7 @@ function renderGraph(data, options = {}) {
     }
 
     selectProgram(selectedProgramId);
+    updateGraphEdgeSelection(); // update edge highlight after render
     applyDragHandlersToAllNodes();
 
     svg.on("click", function(event) {
@@ -385,6 +391,14 @@ export function centerAndHighlightNodeInGraph(nodeId) {
     }
 }
 
+export function updateGraphEdgeSelection() {
+    if (!g) return;
+    g.selectAll('line')
+        .attr('stroke', d => (selectedProgramId && (d.source.id === selectedProgramId || d.target.id === selectedProgramId)) ? 'red' : '#999')
+        .attr('stroke-width', d => (selectedProgramId && (d.source.id === selectedProgramId || d.target.id === selectedProgramId)) ? 4 : 2)
+        .attr('stroke-opacity', d => (selectedProgramId && (d.source.id === selectedProgramId || d.target.id === selectedProgramId)) ? 0.95 : 0.6);
+}
+
 function dragstarted(event, d) {
     if (!event.active && simulation) simulation.alphaTarget(0.3).restart(); // Keep simulation alive
     d.fx = d.x;
@@ -400,4 +414,9 @@ function dragended(event, d) {
     d.fy = null;
 }
 
+window.addEventListener('node-selected', function(e) {
+    // When node selection changes (e.g., from list view), update graph node selection
+    updateGraphNodeSelection();
+});
+
 export { renderGraph, g };

scripts/static/js/list.js

@@ -55,6 +55,9 @@ export function renderNodeList(nodes) {
         <span class="summary-label">Average</span>
         <span class="summary-value">${avgScore.toFixed(4)}</span>
         ${renderMetricBar(avgScore, minScore, maxScore)}
+        <span style="margin-left:1.2em;font-size:0.98em;color:#888;vertical-align:middle;">
+          <span title="Total programs, generations, islands">📦</span> Total: ${nodes.length} programs, ${new Set(nodes.map(n => n.generation)).size} generations, ${new Set(nodes.map(n => n.island)).size} islands
+        </span>
       </div>
     `;
     container.innerHTML = '';
@@ -151,6 +154,12 @@ export function renderNodeList(nodes) {
         }, 0);
         container.appendChild(row);
     });
+    container.focus();
+    // Scroll to selected node if present
+    const selected = container.querySelector('.node-list-item.selected');
+    if (selected) {
+        selected.scrollIntoView({behavior: 'smooth', block: 'center'});
+    }
 }
 export function selectListNodeById(id) {
     setSelectedProgramId(id);
@@ -200,4 +209,53 @@ function showSidebarListView() {
     } else {
         showSidebar();
     }
-}
+}
+
+// Sync selection when switching to list tab
+const tabListBtn = document.getElementById('tab-list');
+if (tabListBtn) {
+    tabListBtn.addEventListener('click', () => {
+        renderNodeList(allNodeData);
+    });
+}
+
+// Keyboard navigation for up/down in list view
+const nodeListContainer = document.getElementById('node-list-container');
+if (nodeListContainer) {
+    nodeListContainer.tabIndex = 0;
+    nodeListContainer.addEventListener('keydown', function(e) {
+        if (!['ArrowUp', 'ArrowDown'].includes(e.key)) return;
+        e.preventDefault(); // Always prevent default to avoid browser scroll
+        const items = Array.from(nodeListContainer.querySelectorAll('.node-list-item'));
+        if (!items.length) return;
+        let idx = items.findIndex(item => item.classList.contains('selected'));
+        if (idx === -1) idx = 0;
+        if (e.key === 'ArrowUp' && idx > 0) idx--;
+        if (e.key === 'ArrowDown' && idx < items.length - 1) idx++;
+        const nextItem = items[idx];
+        if (nextItem) {
+            const nodeId = nextItem.getAttribute('data-node-id');
+            selectListNodeById(nodeId);
+            nextItem.focus();
+            nextItem.scrollIntoView({behavior: 'smooth', block: 'center'});
+            // Also scroll the page if needed
+            const rect = nextItem.getBoundingClientRect();
+            if (rect.top < 0 || rect.bottom > window.innerHeight) {
+                window.scrollTo({top: window.scrollY + rect.top - 100, behavior: 'smooth'});
+            }
+        }
+    });
+    // Focus container on click to enable keyboard nav
+    nodeListContainer.addEventListener('click', function() {
+        nodeListContainer.focus();
+    });
+}
+
+// Listen for node selection events from other views and sync selection in the list view
+window.addEventListener('node-selected', function(e) {
+    // e.detail should contain the selected node id
+    if (e.detail && e.detail.id) {
+        setSelectedProgramId(e.detail.id);
+        renderNodeList(allNodeData);
+    }
+});

scripts/static/js/main.js

@@ -5,6 +5,7 @@ import { updateListSidebarLayout, renderNodeList } from './list.js';
 import { renderGraph, g, getNodeRadius, animateGraphNodeAttributes } from './graph.js';
 
 export let allNodeData = [];
+let metricMinMax = {};
 
 let archiveProgramIds = [];
 
@@ -13,15 +14,55 @@ const sidebarEl = document.getElementById('sidebar');
 let lastDataStr = null;
 let selectedProgramId = null;
 
+function computeMetricMinMax(nodes) {
+    metricMinMax = {};
+    if (!nodes) return;
+    nodes.forEach(n => {
+        if (n.metrics && typeof n.metrics === 'object') {
+            for (const [k, v] of Object.entries(n.metrics)) {
+                if (typeof v === 'number' && isFinite(v)) {
+                    if (!(k in metricMinMax)) {
+                        metricMinMax[k] = {min: v, max: v};
+                    } else {
+                        metricMinMax[k].min = Math.min(metricMinMax[k].min, v);
+                        metricMinMax[k].max = Math.max(metricMinMax[k].max, v);
+                    }
+                }
+            }
+        }
+    });
+    // Avoid min==max
+    for (const k in metricMinMax) {
+        if (metricMinMax[k].min === metricMinMax[k].max) {
+            metricMinMax[k].min = 0;
+            metricMinMax[k].max = 1;
+        }
+    }
+}
+
 function formatMetrics(metrics) {
-    return Object.entries(metrics).map(([k, v]) => `<b>${k}</b>: ${v}`).join('<br>');
+    if (!metrics || typeof metrics !== 'object') return '';
+    let rows = Object.entries(metrics).map(([k, v]) => {
+        let min = 0, max = 1;
+        if (metricMinMax[k]) {
+            min = metricMinMax[k].min;
+            max = metricMinMax[k].max;
+        }
+        let valStr = (typeof v === 'number' && isFinite(v)) ? v.toFixed(4) : v;
+        return `<tr><td style='padding-right:0.7em;'><b>${k}</b></td><td style='padding-right:0.7em;'>${valStr}</td><td style='min-width:90px;'>${typeof v === 'number' ? renderMetricBar(v, min, max) : ''}</td></tr>`;
+    }).join('');
+    return `<table class='metrics-table'><tbody>${rows}</tbody></table>`;
 }
 
 function renderMetricBar(value, min, max, opts={}) {
     let percent = 0;
-    if (typeof value === 'number' && isFinite(value) && max > min) {
-        percent = (value - min) / (max - min);
-        percent = Math.max(0, Math.min(1, percent));
+    if (typeof value === 'number' && isFinite(value)) {
+        if (max > min) {
+            percent = (value - min) / (max - min);
+            percent = Math.max(0, Math.min(1, percent));
+        } else if (max === min) {
+            percent = 1; // Show as filled if min==max
+        }
     }
     let minLabel = `<span class="metric-bar-min">${min.toFixed(2)}</span>`;
     let maxLabel = `<span class="metric-bar-max">${max.toFixed(2)}</span>`;
@@ -201,10 +242,11 @@ document.getElementById('tab-branching').addEventListener('click', function() {
 // Export all shared state and helpers for use in other modules
 export function setAllNodeData(nodes) {
     allNodeData = nodes;
+    computeMetricMinMax(nodes);
 }
 
 export function setSelectedProgramId(id) {
     selectedProgramId = id;
 }
 
-export { archiveProgramIds, lastDataStr, selectedProgramId, formatMetrics, renderMetricBar, getHighlightNodes, getSelectedMetric };
+export { archiveProgramIds, lastDataStr, selectedProgramId, formatMetrics, renderMetricBar, getHighlightNodes, getSelectedMetric, metricMinMax };