diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index a99f3c0effb..06fd09d9de1 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -84,6 +84,7 @@ RUN curl -fsSL https://claude.ai/install.sh | bash
 
 RUN \
    rustup install $RUST_VERSION && \
+   rustup default $RUST_VERSION && \
    rustup component add rustfmt && \
    rustup component add clippy && \
    cargo install cargo-make
diff --git a/js-packages/profiler-app/src/App.svelte b/js-packages/profiler-app/src/App.svelte
index d59000790d5..960e370f1bc 100644
--- a/js-packages/profiler-app/src/App.svelte
+++ b/js-packages/profiler-app/src/App.svelte
@@ -20,7 +20,7 @@
   let sqlPanelFullHeight = $state(false)
 
   let profileData: {
-    profile: JsonProfiles
+    profile: JsonProfiles | undefined
     dataflow: Dataflow | undefined
     sources: string[] | undefined
     logText: string | undefined
@@ -65,7 +65,7 @@
         const suitableProfiles = getSuitableProfiles(zipData)
         if (suitableProfiles.length === 0) {
           throw new Error(
-            'No suitable profiles found in the uploaded support bundle. Check if it contains the circuit profile and dataflow graph (optional).'
+            'No readable data found in the uploaded support bundle. Check that it contains a circuit profile, config, logs or stats.'
           )
         }
         profileFiles = suitableProfiles
@@ -147,8 +147,8 @@
 
       <div class="bg-surface-50 max-w-md rounded-container p-6 shadow-lg">
         <p class="mb-6 text-sm text-surface-700">
-          Load a Feldera support bundle (.zip file) containing circuit profile data to begin
-          visualization.
+          Load a Feldera support bundle (.zip file) to explore the circuit profile,
+          program code, logs and the pipeline config.
         </p>
 
         {#if isLoading}
diff --git a/js-packages/profiler-layout/src/lib/components/SupportBundleViewerLayout.svelte b/js-packages/profiler-layout/src/lib/components/SupportBundleViewerLayout.svelte
index 96d588c24c5..21b6f7ec623 100644
--- a/js-packages/profiler-layout/src/lib/components/SupportBundleViewerLayout.svelte
+++ b/js-packages/profiler-layout/src/lib/components/SupportBundleViewerLayout.svelte
@@ -39,7 +39,8 @@
   type AnalysisTab = (typeof TABS)[number]
 
   interface Props {
-    profileData: JsonProfiles
+    /** Parsed circuit profile */
+    profileData?: JsonProfiles
     dataflowData: Dataflow | undefined
     programCode: string[] | undefined
     logText?: string
@@ -81,6 +82,12 @@
     onRenderingChange
   }: Props = $props()
 
+  const hasProfile = $derived(profileData !== undefined)
+
+  const graphPaneDefaultSize = 55
+  const graphPaneMinSize = 20
+  const belowGraphPaneDefaultSize = 100 - graphPaneDefaultSize
+
   let profilerDiagram: ProfilerDiagram | undefined = $state()
   // The loaded profile's toplevel node id, so the analysis panel can recognise overview data.
   const diagramRootNodeId = $derived(profilerDiagram?.getProfile()?.rootNodeId)
@@ -137,7 +144,6 @@
       const attrs = data.match({ some: (v) => v, none: () => null })
       untrack(() => {
         if (attrs) {
-          currentTab = 'Metrics'
           tooltipData = { nodeAttributes: attrs }
           // Only cache while we're on a node view, so an `'overview'` round-trip can't
           // overwrite the operator the user actually inspected.
@@ -205,19 +211,18 @@
     profilerDiagram?.selectMetric(selectedMetricId)
   })
 
-  // Show the overview each time a profile loads. `analysisView` is reset first so the
+  // Reset to the overview whenever the loaded bundle changes. `analysisView` is reset first so the
   // SegmentedControl indicator follows the new view, and so the sticky `displayNodeAttributes`
   // that `showGlobalMetrics` triggers sees a non-node view and can't overwrite `lastNodeData`
   // with the overview payload.
   $effect(() => {
     void profileData
     const diagram = profilerDiagram
-    if (!diagram) {
-      return
-    }
     queueMicrotask(() => {
       analysisView = 'overview'
-      diagram.showGlobalMetrics(true)
+      tooltipData = null
+      lastNodeData = null
+      diagram?.showGlobalMetrics(true)
     })
   })
 
@@ -316,42 +321,54 @@
 
 <!-- ── Graph panel (dataflow graph) ────────────────────────────────────────── -->
 {#snippet graphPanel()}
-  <div class="flex h-full flex-col overflow-hidden rounded-container bg-surface-50-950">
+  <div
+    class="flex flex-col overflow-hidden rounded-container bg-surface-50-950 {hasProfile
+      ? 'h-full'
+      : ''}"
+  >
     <!-- Header -->
     <div class="flex flex-shrink-0 flex-wrap items-center gap-2 p-4">
       {@render loadProfileControl?.()}
       <ProfileTimestampSelector {profileFiles} {selectedTimestamp} {onSelectTimestamp} />
-      <div class="ml-auto">
-        <input
-          bind:value={nodeSearchQuery}
-          type="text"
-          placeholder="Search node"
-          title="Search for a node by ID or persistent ID"
-          onkeydown={(e) => e.key === 'Enter' && handleSearch()}
-          class="input h-6 w-36 text-sm"
-        />
-      </div>
+      {#if hasProfile}
+        <div class="ml-auto">
+          <input
+            bind:value={nodeSearchQuery}
+            type="text"
+            placeholder="Search node"
+            title="Search for a node by ID or persistent ID"
+            onkeydown={(e) => e.key === 'Enter' && handleSearch()}
+            class="input h-6 w-36 text-sm"
+          />
+        </div>
+      {:else}
+        <p class="text-sm text-surface-600-400">
+          This bundle has no circuit profile, so the dataflow graph is unavailable.
+        </p>
+      {/if}
     </div>
     <!-- Diagram slot. The actual <ProfilerDiagram> is rendered once outside the layout-
          toggle as a <PersistentContent> overlay so it survives the sqlPanelFullHeight
          layout toggle without re-initialising the Visualizer. The `use:` action mirrors
          this div's bounding rect onto the shared handle. -->
-    <div use:diagramRect.placeholder class="relative min-h-0 flex-1 bg-white-dark">
-      {#if error}
-        <div
-          class="absolute inset-x-4 top-4 z-10 rounded border border-red-300 bg-white p-3 font-mono text-sm text-red-600 shadow"
-        >
-          {error}
-        </div>
-      {/if}
-      {#if message}
-        <div
-          class="absolute left-2 top-2 z-10 rounded bg-white/90 px-2 py-1 font-mono text-sm shadow"
-        >
-          {message}
-        </div>
-      {/if}
-    </div>
+    {#if hasProfile}
+      <div use:diagramRect.placeholder class="relative min-h-0 flex-1 bg-white-dark">
+        {#if error}
+          <div
+            class="absolute inset-x-4 top-4 z-10 rounded border border-red-300 bg-white p-3 font-mono text-sm text-red-600 shadow"
+          >
+            {error}
+          </div>
+        {/if}
+        {#if message}
+          <div
+            class="absolute left-2 top-2 z-10 rounded bg-white/90 px-2 py-1 font-mono text-sm shadow"
+          >
+            {message}
+          </div>
+        {/if}
+      </div>
+    {/if}
   </div>
 {/snippet}
 
@@ -446,7 +463,7 @@
     items={[
       { value: 'overview', label: 'Overview' },
       { value: 'node', label: 'Node', disabled: !lastNodeData },
-      { value: 'top-nodes', label: 'Top nodes' }
+      { value: 'top-nodes', label: 'Top nodes', disabled: !hasProfile }
     ]}
     class="px-2"
   />
@@ -491,11 +508,17 @@
 <!-- ══ Layout: normal (graph top, SQL + tabs bottom) ══════════════════════ -->
 {#if !sqlPanelFullHeight}
   <PaneGroup direction="vertical" class="!overflow-visible h-full">
-    <Pane defaultSize={55} minSize={20} class="!overflow-visible">
-      {@render graphPanel()}
-    </Pane>
-    <PaneResizer class="pane-divider-horizontal my-2" />
-    <Pane defaultSize={45} minSize={15} class="!overflow-visible">
+    {#if hasProfile}
+      <Pane defaultSize={graphPaneDefaultSize} minSize={graphPaneMinSize} class="!overflow-visible">
+        {@render graphPanel()}
+      </Pane>
+      <PaneResizer class="pane-divider-horizontal my-2" />
+    {:else}
+      <div class="mb-4">
+        {@render graphPanel()}
+      </div>
+    {/if}
+    <Pane defaultSize={belowGraphPaneDefaultSize} minSize={15} class="!overflow-visible">
       <PaneGroup direction="horizontal" class="!overflow-visible h-full">
         <Pane defaultSize={50} minSize={0} class="!overflow-visible">
           <div use:sqlPanelRect.placeholder class="h-full"></div>
@@ -516,11 +539,21 @@
     <PaneResizer class="pane-divider-vertical mx-1.5" />
     <Pane minSize={20} class="!overflow-visible">
       <PaneGroup direction="vertical" class="!overflow-visible h-full">
-        <Pane defaultSize={55} minSize={20} class="!overflow-visible">
-          {@render graphPanel()}
-        </Pane>
-        <PaneResizer class="pane-divider-horizontal my-2" />
-        <Pane defaultSize={45} minSize={15} class="!overflow-visible">
+        {#if hasProfile}
+          <Pane
+            defaultSize={graphPaneDefaultSize}
+            minSize={graphPaneMinSize}
+            class="!overflow-visible"
+          >
+            {@render graphPanel()}
+          </Pane>
+          <PaneResizer class="pane-divider-horizontal my-2" />
+        {:else}
+          <div class="mb-4">
+            {@render graphPanel()}
+          </div>
+        {/if}
+        <Pane defaultSize={belowGraphPaneDefaultSize} minSize={15} class="!overflow-visible">
           {@render analysisPanel()}
         </Pane>
       </PaneGroup>
@@ -532,15 +565,17 @@
      <PersistentPlaceholder> in graphPanel. Surviving the layout toggle (and any other
      conditional re-render of graphPanel) is what keeps the Visualizer's internal state intact
      instead of being torn down and re-created from `profileData` each time. -->
-<PersistentContent persistent={diagramRect} class="overflow-hidden bg-white-dark">
-  <ProfilerDiagram
-    bind:this={profilerDiagram}
-    {profileData}
-    {dataflowData}
-    {programCode}
-    {callbacks}
-  />
-</PersistentContent>
+{#if profileData}
+  <PersistentContent persistent={diagramRect} class="overflow-hidden bg-white-dark">
+    <ProfilerDiagram
+      bind:this={profilerDiagram}
+      {profileData}
+      {dataflowData}
+      {programCode}
+      {callbacks}
+    />
+  </PersistentContent>
+{/if}
 
 <!-- Persistent SQL panel overlay. Hoisted out of the layout branches for the same reason as the
      diagram: rendered once, it mirrors the placeholder in whichever {#if} branch is active, so the
diff --git a/js-packages/profiler-layout/src/lib/functions/processZipBundle.test.ts b/js-packages/profiler-layout/src/lib/functions/processZipBundle.test.ts
index f9cad849f7c..563472880fa 100644
--- a/js-packages/profiler-layout/src/lib/functions/processZipBundle.test.ts
+++ b/js-packages/profiler-layout/src/lib/functions/processZipBundle.test.ts
@@ -1,6 +1,6 @@
 import type { ZipItem } from 'but-unzip'
 import { describe, expect, it } from 'vitest'
-import { processProfileFiles } from './processZipBundle.js'
+import { processProfileFiles, selectProfiles } from './processZipBundle.js'
 
 /** Build a ZipItem whose `read()` returns the UTF-8 bytes of `text`. */
 function file(filename: string, text: string): ZipItem {
@@ -9,19 +9,61 @@ function file(filename: string, text: string): ZipItem {
 
 const TIMESTAMP = '2026-05-25T12-34-56.789Z'
 
-/** A minimal circuit profile; `processProfileFiles` requires this file to exist. */
-function circuitProfile(): ZipItem {
-  return file(`${TIMESTAMP}/circuit_profile.json`, JSON.stringify({ nodes: [] }))
+/** A minimal circuit profile. */
+function circuitProfile(dir = TIMESTAMP): ZipItem {
+  return file(`${dir}/circuit_profile.json`, JSON.stringify({ nodes: [] }))
 }
 
 /** A `pipeline_config.json` with the given extra top-level fields alongside `program_code`. */
-function pipelineConfig(extra: Record<string, unknown>): ZipItem {
+function pipelineConfig(extra: Record<string, unknown>, dir = TIMESTAMP): ZipItem {
   return file(
-    `${TIMESTAMP}/pipeline_config.json`,
+    `${dir}/pipeline_config.json`,
     JSON.stringify({ program_code: 'SELECT 1;', name: 'p', ...extra })
   )
 }
 
+function logs(dir = TIMESTAMP): ZipItem {
+  return file(`${dir}/logs.txt`, 'starting up\n')
+}
+
+describe('selectProfiles', () => {
+  it('keeps a collection that has no circuit profile but does have other files', () => {
+    // Regression: the old filter required a circuit_profile.json, so a config/logs-only bundle
+    // was dropped and refused to open.
+    const collections = selectProfiles([pipelineConfig({}), logs()])
+    expect(collections).toHaveLength(1)
+    expect(collections[0][1]).toHaveLength(2)
+  })
+
+  it('drops files that carry no recognised content', () => {
+    const collections = selectProfiles([
+      file(`${TIMESTAMP}/unknown.bin`, 'x'),
+      file('README.txt', 'not in a collection dir')
+    ])
+    expect(collections).toEqual([])
+  })
+
+  it('sorts multiple collections oldest-first', () => {
+    const older = '2026-05-25T12-00-00.000Z'
+    const newer = '2026-05-25T13-00-00.000Z'
+    const collections = selectProfiles([circuitProfile(newer), logs(older)])
+    expect(collections.map(([d]) => d.getTime())).toEqual([
+      new Date('2026-05-25T12:00:00.000Z').getTime(),
+      new Date('2026-05-25T13:00:00.000Z').getTime()
+    ])
+  })
+})
+
+describe('processProfileFiles without a circuit profile', () => {
+  it('leaves profile undefined while still extracting config and logs', async () => {
+    const result = await processProfileFiles([pipelineConfig({}), logs()])
+    expect(result.profile).toBeUndefined()
+    expect(result.sources).toEqual(['SELECT 1;'])
+    expect(result.pipelineName).toBe('p')
+    expect(result.logText).toBe('starting up\n')
+  })
+})
+
 describe('processProfileFiles runtimeConfig', () => {
   it('extracts runtime_config from pipeline_config.json', async () => {
     const runtime_config = { workers: 8, storage: { backend: { name: 'default' } } }
diff --git a/js-packages/profiler-layout/src/lib/functions/processZipBundle.ts b/js-packages/profiler-layout/src/lib/functions/processZipBundle.ts
index ac5999b7b0a..dfdecc2acd0 100644
--- a/js-packages/profiler-layout/src/lib/functions/processZipBundle.ts
+++ b/js-packages/profiler-layout/src/lib/functions/processZipBundle.ts
@@ -10,6 +10,16 @@ const pipelineConfigRegex = /pipeline_config\.json$/
 const logsRegex = /logs\.txt$/
 const statsRegex = /stats\.json$/
 
+// Any of these files makes a collection worth opening. A bundle missing the circuit profile
+// still carries program code, config, logs and stats, all of which the viewer can display.
+const usefulFileRegexes = [
+  circuitProfileRegex,
+  dataflowGraphRegex,
+  pipelineConfigRegex,
+  logsRegex,
+  statsRegex
+]
+
 // New bundle layout (since support-bundle metadata_version 1): each collection
 // lives under a directory named after its timestamp, e.g.
 // "2026-05-25T12-34-56.789Z/circuit_profile.json". Collisions get a "-N" suffix
@@ -42,7 +52,8 @@ function collectionDate(key: string): Date {
 }
 
 export interface ProcessedProfile {
-  profile: JsonProfiles
+  /** Parsed `circuit_profile.json` */
+  profile?: JsonProfiles
   dataflow?: Dataflow
   sources?: string[]
   logText?: string
@@ -55,8 +66,10 @@ export interface ProcessedProfile {
 }
 
 /**
- * Unzip a bundle and extract all suitable profiles with their files.
+ * Unzip a bundle and extract every readable profile with its files.
  * This function only unzips once - store the result for efficient timestamp switching.
+ * A profile is readable when it holds any recognised file (circuit profile, dataflow graph,
+ * pipeline config, logs or stats).
  * @param zipData Raw zip file data
  * @returns Array of [timestamp, files] tuples sorted by timestamp (oldest first)
  * @throws Error if the zip is invalid
@@ -70,14 +83,23 @@ export function getSuitableProfiles(zipData: Uint8Array): [Date, ZipItem[]][] {
       `Failed to unzip bundle: ${error instanceof Error ? error.message : String(error)}`
     )
   }
+  return selectProfiles(profileFiles)
+}
 
-  const profileTimestamps = groupBy(profileFiles, (file) => collectionKey(file.filename)).filter(
-    (group) => group[0] && group[1].some((file) => circuitProfileRegex.test(file.filename))
-    // Pipeline config and dataflow graph are not required
+/**
+ * Group already-unzipped bundle files into readable profiles, sorted oldest-first.
+ * A collection is kept when its timestamp directory holds any recognised file; the circuit
+ * profile is not required.
+ */
+export function selectProfiles(files: ZipItem[]): [Date, ZipItem[]][] {
+  const profiles = groupBy(files, (file) => collectionKey(file.filename)).filter(
+    (group) =>
+      group[0] &&
+      group[1].some((file) => usefulFileRegexes.some((regex) => regex.test(file.filename)))
   )
 
   return sortOn(
-    profileTimestamps.map(([key, files]) => [collectionDate(key), files] as [Date, ZipItem[]]),
+    profiles.map(([key, files]) => [collectionDate(key), files] as [Date, ZipItem[]]),
     (p) => p[0]
   )
 }
@@ -91,9 +113,12 @@ export function getSuitableProfiles(zipData: Uint8Array): [Date, ZipItem[]][] {
 export async function processProfileFiles(files: ZipItem[]): Promise<ProcessedProfile> {
   const decoder = new TextDecoder()
 
-  // Read and parse the three required files
-  const profileFile = files.find((file) => circuitProfileRegex.test(file.filename))!
-  const profile = JSON.parse(decoder.decode(await profileFile.read())) as JsonProfiles
+  // The circuit profile is optional: a bundle without it still yields config, logs and stats.
+  const profileFile = files.find((file) => circuitProfileRegex.test(file.filename))
+  let profile: JsonProfiles | undefined
+  if (profileFile) {
+    profile = JSON.parse(decoder.decode(await profileFile.read())) as JsonProfiles
+  }
 
   const dataflowFile = files.find((file) => dataflowGraphRegex.test(file.filename))
   let dataflow: Dataflow | undefined
diff --git a/js-packages/web-console/src/lib/components/pipelines/list/Actions.svelte b/js-packages/web-console/src/lib/components/pipelines/list/Actions.svelte
index bb3cd817056..05f0ccf1fdd 100644
--- a/js-packages/web-console/src/lib/components/pipelines/list/Actions.svelte
+++ b/js-packages/web-console/src/lib/components/pipelines/list/Actions.svelte
@@ -117,7 +117,9 @@ groups related actions into multi-action dropdowns when multiple options are ava
 
   // An already-deleted pipeline offers no Delete action; otherwise the backend
   // dictates when deletion is possible (fully stopped, storage cleared).
-  const deleteDisabledReason = $derived(deletePipelineDisabledReason(pipeline.current.status, pipeline.current.storageStatus, deleted))
+  const deleteDisabledReason = $derived(
+    deletePipelineDisabledReason(pipeline.current.status, pipeline.current.storageStatus, deleted)
+  )
 
   const actions = {
     _start,
diff --git a/js-packages/web-console/src/lib/functions/pipelines/status.spec.ts b/js-packages/web-console/src/lib/functions/pipelines/status.spec.ts
index b2ac7a138d4..4185532bb56 100644
--- a/js-packages/web-console/src/lib/functions/pipelines/status.spec.ts
+++ b/js-packages/web-console/src/lib/functions/pipelines/status.spec.ts
@@ -21,13 +21,17 @@ describe('deletePipelineDisabledReason', () => {
   })
 
   it('asks to stop the pipeline while it is still running', () => {
-    expect(deletePipelineDisabledReason('Running', 'Cleared', false)).toBe('Stop the pipeline to delete it.')
+    expect(deletePipelineDisabledReason('Running', 'Cleared', false)).toBe(
+      'Stop the pipeline to delete it.'
+    )
   })
 
   // Stop takes priority: a running pipeline always holds its storage, so naming
   // storage first would send the user down a step they cannot take yet.
   it('asks to stop first even when storage is still in use', () => {
-    expect(deletePipelineDisabledReason('Running', 'InUse', false)).toBe('Stop the pipeline to delete it.')
+    expect(deletePipelineDisabledReason('Running', 'InUse', false)).toBe(
+      'Stop the pipeline to delete it.'
+    )
   })
 
   it('asks to clear storage when stopped but storage is in use', () => {
@@ -61,7 +65,9 @@ describe('deletePipelineDisabledReason', () => {
     const anyStorage: StorageStatus[] = ['Cleared', 'InUse', 'Clearing']
     for (const status of transitional) {
       for (const storage of anyStorage) {
-        expect(deletePipelineDisabledReason(status, storage, false)).toBe('Stop the pipeline to delete it.')
+        expect(deletePipelineDisabledReason(status, storage, false)).toBe(
+          'Stop the pipeline to delete it.'
+        )
       }
     }
   })
diff --git a/js-packages/web-console/src/routes/(system)/(authenticated)/profile-viewer/+page.svelte b/js-packages/web-console/src/routes/(system)/(authenticated)/profile-viewer/+page.svelte
index 103e7aeb117..26b2729c6d4 100644
--- a/js-packages/web-console/src/routes/(system)/(authenticated)/profile-viewer/+page.svelte
+++ b/js-packages/web-console/src/routes/(system)/(authenticated)/profile-viewer/+page.svelte
@@ -45,7 +45,7 @@
   let selectedProfile: Date | null = $state(null)
   let getProfileData:
     | (() => {
-        profile: JsonProfiles
+        profile: JsonProfiles | undefined
         dataflow: Dataflow | undefined
         sources: string[] | undefined
         logText: string | undefined
@@ -126,7 +126,7 @@
         const buffer = await receiveUploadedBundle(channel)
         await processZipBundle(
           new Uint8Array(buffer),
-          'No suitable profiles found in the uploaded bundle.'
+          'No readable data found in the uploaded bundle.'
         )
       } else {
         downloadProgress.onProgress(0, 1)
@@ -144,7 +144,7 @@
         const supportBundle = await dataPromise
         await processZipBundle(
           new Uint8Array(await supportBundle.data.arrayBuffer()),
-          'No suitable profiles found. Try enabling "Collect new data".'
+          'No readable data found. Try enabling "Collect new data".'
         )
       }
     }, onLoadError('Failed to load the profile bundle.'))
@@ -169,7 +169,7 @@
       const bundle = await dataPromise
       await processZipBundle(
         new Uint8Array(await bundle.data.arrayBuffer()),
-        'No suitable profiles found. Try enabling "Collect new data".'
+        'No readable data found. Try enabling "Collect new data".'
       )
     }, onLoadError('Failed to download the profile bundle.'))
   }