Publish Ropedia Xperience-10M derived artifacts

PROJECT_README.md

@@ -25,8 +25,8 @@ into:
 - four additional direction-extension probes with minimal and neural baselines,
 - human-readable research task cards and an interactive scrub/play walkthrough storyboard for every task,
 - a next-milestone track for Qwen3-Omni fine-tuning and sensor-bridge evaluation,
-- metrics, predictions, model weights, manifests, charts, and a tabbed static
-  research website,
+- metrics, predictions, model weights, manifests, charts, and a two-level
+  tabbed static research website,
 - a generated public-surface QA report for repo, website, and Hugging Face
   presentation quality,
 - a clear explanation of what a single episode can and cannot prove.
@@ -121,7 +121,7 @@ They give the current research state in one compact table:
 | Official dataset wording | Verified against the public `ropedia-ai/xperience-10m` dataset card/API metadata |
 | Source alignment | Verified source facts and source-boundary markers across repo, website, and HF cards |
 | Evaluation protocol | Verified generated protocol for windowing, split policy, leakage controls, and per-task metrics |
-| Website and HF mirrors | Verified by local integrity, public-surface QA, mirror parity, and live-publication checks; the public dashboard is organized into five tabs: Start, Data & Tasks, Method, Results, and Resources |
+| Website and HF mirrors | Verified by local integrity, public-surface QA, mirror parity, and live-publication checks; the public dashboard uses five top-level tabs plus subsection tabs for dataset, task-suite, method, result, and resource views |
 | Qwen3-Omni 32-episode pilot | Data-gated; prepared, but not a model-quality claim |
 | Raw Xperience-10M data / full Qwen weights | Not redistributed |
 

README.md

@@ -35,9 +35,10 @@ artifact repo reads as a coherent Xperience-10M multimodal task suite. Labels,
 dimensions, and metrics are generated from committed result files rather than
 hand-edited presentation copy.
 
-The Space is now organized as a five-tab research dashboard: Start, Data &
-Tasks, Method, Results, and Resources. It still foregrounds the task-first 12-task map
-and includes a native responsive modality atlas backed by
+The Space is organized as a two-level research dashboard: five top-level tabs
+plus subsection tabs for dataset, task-suite, method, result, and resource
+views. It still foregrounds the task-first 12-task map and includes a native
+responsive modality atlas backed by
 `docs/data/modality_atlas.json` and `docs/assets/modalities/`, so each
 public-sample stream remains readable on mobile without shipping raw videos or
 annotations.

docs/data/artifact_index.json

@@ -1,6 +1,6 @@
 {
   "title": "Ropedia Xperience-10M Task Suite Artifact Index",
-  "generated_at_utc": "2026-06-02T07:24:12+00:00",
+  "generated_at_utc": "2026-06-02T07:49:12+00:00",
   "status": "pass",
   "artifact_count": 55,
   "missing": [],
@@ -272,7 +272,7 @@
       "proves": "Machine-readable release-gate summary for validators, mirrors, and public project surfaces.",
       "exists": true,
       "bytes": 7480,
-      "sha256": "4ed57c56fe9e0340577b342f46a3de4de711dba0e2b172aff8ab874bf4c3f8e6"
+      "sha256": "c52a074817001ff2711e21fa07bae3010bfbff417de0465255695996e22e9adb"
     },
     {
       "id": "public_surface_qa",

docs/data/mirror_parity.json

@@ -1,6 +1,6 @@
 {
   "status": "pass",
-  "generated_at_utc": "2026-06-02T07:24:45+00:00",
+  "generated_at_utc": "2026-06-02T07:50:03+00:00",
   "hf_root": "hf_publish",
   "summary": {
     "group_count": 65,
@@ -37,26 +37,26 @@
         "path": "repo:docs/data/artifact_index.json",
         "exists": true,
         "bytes": 24778,
-        "sha256": "d235b6afdc688513f402eb0001d70c5410b01174f7576bd300780e917ff5d926"
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       },
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           "path": "hf_space:data/artifact_index.json",
           "exists": true,
           "bytes": 24778,
-          "sha256": "d235b6afdc688513f402eb0001d70c5410b01174f7576bd300780e917ff5d926"
+          "sha256": "cf47d882f84a61b3b190ea0377235f51050b511b57de175490138de3a6da8d0f"
         },
         "hf_artifacts": {
           "path": "hf_artifacts:docs/data/artifact_index.json",
           "exists": true,
           "bytes": 24778,
-          "sha256": "d235b6afdc688513f402eb0001d70c5410b01174f7576bd300780e917ff5d926"
+          "sha256": "cf47d882f84a61b3b190ea0377235f51050b511b57de175490138de3a6da8d0f"
         },
         "hf_model": {
           "path": "hf_model:metrics/artifact_index.json",
           "exists": true,
           "bytes": 24778,
-          "sha256": "d235b6afdc688513f402eb0001d70c5410b01174f7576bd300780e917ff5d926"
+          "sha256": "cf47d882f84a61b3b190ea0377235f51050b511b57de175490138de3a6da8d0f"
         }
       },
       "failures": []
@@ -347,26 +347,26 @@
         "path": "repo:docs/data/publication_audit.json",
         "exists": true,
         "bytes": 6796,
-        "sha256": "88fe191f7c0a892852208b866cc33839d646f8f1811919ea927941b5f40351ef"
+        "sha256": "7f83064700209ac376c38621978d2ffa6437838491f95ca6c28c99b2de78f99e"
       },
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           "exists": true,
           "bytes": 6796,
-          "sha256": "88fe191f7c0a892852208b866cc33839d646f8f1811919ea927941b5f40351ef"
+          "sha256": "7f83064700209ac376c38621978d2ffa6437838491f95ca6c28c99b2de78f99e"
         },
         "hf_artifacts": {
           "path": "hf_artifacts:docs/data/publication_audit.json",
           "exists": true,
           "bytes": 6796,
-          "sha256": "88fe191f7c0a892852208b866cc33839d646f8f1811919ea927941b5f40351ef"
+          "sha256": "7f83064700209ac376c38621978d2ffa6437838491f95ca6c28c99b2de78f99e"
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         "hf_model": {
           "path": "hf_model:metrics/publication_audit.json",
           "exists": true,
           "bytes": 6796,
-          "sha256": "88fe191f7c0a892852208b866cc33839d646f8f1811919ea927941b5f40351ef"
+          "sha256": "7f83064700209ac376c38621978d2ffa6437838491f95ca6c28c99b2de78f99e"
         }
       },
       "failures": []
@@ -378,26 +378,26 @@
         "path": "repo:docs/data/public_surface_qa.json",
         "exists": true,
         "bytes": 5288,
-        "sha256": "cbe78184ec6408a03bcf8d2bf0690d9bafa74486bd8371292fbccb7b35b20671"
+        "sha256": "b196e571ddc7719c3d1e56638ef3a758d069ee4ab3787b8b0cb058ad1c59c5ca"
       },
       "mirrors": {
         "hf_space": {
           "path": "hf_space:data/public_surface_qa.json",
           "exists": true,
           "bytes": 5288,
-          "sha256": "cbe78184ec6408a03bcf8d2bf0690d9bafa74486bd8371292fbccb7b35b20671"
+          "sha256": "b196e571ddc7719c3d1e56638ef3a758d069ee4ab3787b8b0cb058ad1c59c5ca"
         },
         "hf_artifacts": {
           "path": "hf_artifacts:docs/data/public_surface_qa.json",
           "exists": true,
           "bytes": 5288,
-          "sha256": "cbe78184ec6408a03bcf8d2bf0690d9bafa74486bd8371292fbccb7b35b20671"
+          "sha256": "b196e571ddc7719c3d1e56638ef3a758d069ee4ab3787b8b0cb058ad1c59c5ca"
         },
         "hf_model": {
           "path": "hf_model:metrics/public_surface_qa.json",
           "exists": true,
           "bytes": 5288,
-          "sha256": "cbe78184ec6408a03bcf8d2bf0690d9bafa74486bd8371292fbccb7b35b20671"
+          "sha256": "b196e571ddc7719c3d1e56638ef3a758d069ee4ab3787b8b0cb058ad1c59c5ca"
         }
       },
       "failures": []
@@ -409,26 +409,26 @@
         "path": "repo:docs/data/quality_gates.json",
         "exists": true,
         "bytes": 7480,
-        "sha256": "4ed57c56fe9e0340577b342f46a3de4de711dba0e2b172aff8ab874bf4c3f8e6"
+        "sha256": "c52a074817001ff2711e21fa07bae3010bfbff417de0465255695996e22e9adb"
       },
       "mirrors": {
         "hf_space": {
           "path": "hf_space:data/quality_gates.json",
           "exists": true,
           "bytes": 7480,
-          "sha256": "4ed57c56fe9e0340577b342f46a3de4de711dba0e2b172aff8ab874bf4c3f8e6"
+          "sha256": "c52a074817001ff2711e21fa07bae3010bfbff417de0465255695996e22e9adb"
         },
         "hf_artifacts": {
           "path": "hf_artifacts:docs/data/quality_gates.json",
           "exists": true,
           "bytes": 7480,
-          "sha256": "4ed57c56fe9e0340577b342f46a3de4de711dba0e2b172aff8ab874bf4c3f8e6"
+          "sha256": "c52a074817001ff2711e21fa07bae3010bfbff417de0465255695996e22e9adb"
         },
         "hf_model": {
           "path": "hf_model:metrics/quality_gates.json",
           "exists": true,
           "bytes": 7480,
-          "sha256": "4ed57c56fe9e0340577b342f46a3de4de711dba0e2b172aff8ab874bf4c3f8e6"
+          "sha256": "c52a074817001ff2711e21fa07bae3010bfbff417de0465255695996e22e9adb"
         }
       },
       "failures": []
@@ -688,26 +688,26 @@
         "path": "repo:docs/data/website_integrity.json",
         "exists": true,
         "bytes": 11168,
-        "sha256": "cad5ac7e448ab0dca49d41803bf0961e3769ba40419dd71591b02f015f340a38"
+        "sha256": "f957fb4a9d12a003ee86c73f54fd53ef94d48fc1f35d17ff1e4b5ef363967e60"
       },
       "mirrors": {
         "hf_space": {
           "path": "hf_space:data/website_integrity.json",
           "exists": true,
           "bytes": 11168,
-          "sha256": "cad5ac7e448ab0dca49d41803bf0961e3769ba40419dd71591b02f015f340a38"
+          "sha256": "f957fb4a9d12a003ee86c73f54fd53ef94d48fc1f35d17ff1e4b5ef363967e60"
         },
         "hf_artifacts": {
           "path": "hf_artifacts:docs/data/website_integrity.json",
           "exists": true,
           "bytes": 11168,
-          "sha256": "cad5ac7e448ab0dca49d41803bf0961e3769ba40419dd71591b02f015f340a38"
+          "sha256": "f957fb4a9d12a003ee86c73f54fd53ef94d48fc1f35d17ff1e4b5ef363967e60"
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         "hf_model": {
           "path": "hf_model:metrics/website_integrity.json",
           "exists": true,
           "bytes": 11168,
-          "sha256": "cad5ac7e448ab0dca49d41803bf0961e3769ba40419dd71591b02f015f340a38"
+          "sha256": "f957fb4a9d12a003ee86c73f54fd53ef94d48fc1f35d17ff1e4b5ef363967e60"
         }
       },
       "failures": []
@@ -1778,21 +1778,21 @@
       "local": {
         "path": "repo:docs/index.html",
         "exists": true,
-        "bytes": 132092,
-        "sha256": "dc4a0a69191f682aeebc1d70fd4d43916fe8529e17aee9996e09eb5e7812415a"
+        "bytes": 137879,
+        "sha256": "83c21cf907560e0633f028dcf161af31f0d4fd4e3b354d68a1b3b5ff1f2ce420"
       },
       "mirrors": {
         "hf_space": {
           "path": "hf_space:index.html",
           "exists": true,
-          "bytes": 132092,
-          "sha256": "dc4a0a69191f682aeebc1d70fd4d43916fe8529e17aee9996e09eb5e7812415a"
+          "bytes": 137879,
+          "sha256": "83c21cf907560e0633f028dcf161af31f0d4fd4e3b354d68a1b3b5ff1f2ce420"
         },
         "hf_artifacts_docs": {
           "path": "hf_artifacts:docs/index.html",
           "exists": true,
-          "bytes": 132092,
-          "sha256": "dc4a0a69191f682aeebc1d70fd4d43916fe8529e17aee9996e09eb5e7812415a"
+          "bytes": 137879,
+          "sha256": "83c21cf907560e0633f028dcf161af31f0d4fd4e3b354d68a1b3b5ff1f2ce420"
         }
       },
       "failures": []

docs/data/public_surface_qa.json

@@ -1,7 +1,7 @@
 {
   "title": "Ropedia Xperience-10M Public Surface QA",
   "status": "pass",
-  "generated_at_utc": "2026-06-02T07:24:12+00:00",
+  "generated_at_utc": "2026-06-02T07:45:54+00:00",
   "scope": "Repo README, GitHub Pages HTML, Hugging Face Space card, artifact dataset card, and model card.",
   "checks": [
     {
@@ -18,7 +18,7 @@
         "website_integrity": {
           "exists": true,
           "status": "pass",
-          "generated_at_utc": "2026-06-02T07:00:30+00:00"
+          "generated_at_utc": "2026-06-02T07:31:55+00:00"
         },
         "task_surface_integrity": {
           "exists": true,
@@ -38,12 +38,12 @@
         "publication_hygiene": {
           "exists": true,
           "status": "pass",
-          "generated_at_utc": "2026-06-02T07:23:43+00:00"
+          "generated_at_utc": "2026-06-02T07:42:05+00:00"
         },
         "mirror_parity": {
           "exists": true,
           "status": "pass",
-          "generated_at_utc": "2026-06-02T07:23:43+00:00"
+          "generated_at_utc": "2026-06-02T07:43:09+00:00"
         },
         "live_publication": {
           "exists": true,
@@ -74,15 +74,15 @@
       "status": "pass",
       "reason": "The long research dashboard should be navigable as real tabs, including keyboard support.",
       "marker_counts": {
-        "role=\"tablist\"": 1,
+        "role=\"tablist\"": 2,
         "role=\"tab\"": 5,
         "role=\"tabpanel\"": 19,
-        "aria-selected": 6,
-        "aria-controls": 5,
+        "aria-selected": 7,
+        "aria-controls": 6,
         "moveProjectTabFocus": 2,
-        "ArrowRight": 2,
-        "Home": 2,
-        "End": 2
+        "ArrowRight": 4,
+        "Home": 4,
+        "End": 4
       }
     },
     {

docs/data/publication_audit.json

@@ -1,6 +1,6 @@
 {
   "status": "pass",
-  "generated_at_utc": "2026-06-02T07:24:46+00:00",
+  "generated_at_utc": "2026-06-02T07:48:51+00:00",
   "checks": [
     {
       "name": "required_publication_assets_present",

docs/data/quality_gates.json

@@ -1,7 +1,7 @@
 {
   "title": "Ropedia Xperience-10M Publication Quality Gates",
   "status": "pass",
-  "generated_at_utc": "2026-06-02T07:24:12+00:00",
+  "generated_at_utc": "2026-06-02T07:49:01+00:00",
   "rule": "Do not present a release as current unless every automated gate passes, then verify live GitHub/HF mirrors after publishing.",
   "automated_gates": [
     {

docs/data/website_integrity.json

@@ -1,6 +1,6 @@
 {
   "status": "pass",
-  "generated_at_utc": "2026-06-02T07:00:30+00:00",
+  "generated_at_utc": "2026-06-02T07:31:55+00:00",
   "docs_root": "docs",
   "site_base": "/ropedia-xperience-10m-task-suite/",
   "summary": {
@@ -57,7 +57,7 @@
       "name": "project_tabs_update_selected_state",
       "status": "pass",
       "reason": "Tab activation should update selected state for assistive technology.",
-      "selected_count": 6,
+      "selected_count": 7,
       "updates_selected_state": true
     },
     {
@@ -72,8 +72,8 @@
       "name": "project_overview_precedes_progress_ledger",
       "status": "pass",
       "reason": "The project overview should appear before the deeper progress ledger.",
-      "overview_index": 51195,
-      "evidence_index": 58049
+      "overview_index": 52692,
+      "evidence_index": 59546
     },
     {
       "name": "project_status_links_json",
@@ -85,9 +85,9 @@
       "name": "evaluation_protocol_between_overview_and_progress",
       "status": "pass",
       "reason": "The evaluation protocol should appear before the deeper evidence ledger.",
-      "overview_index": 51195,
-      "protocol_index": 55557,
-      "evidence_index": 58049
+      "overview_index": 52692,
+      "protocol_index": 57054,
+      "evidence_index": 59546
     },
     {
       "name": "evaluation_protocol_links_json",
@@ -160,7 +160,7 @@
     },
     {
       "path": "index.html",
-      "id_count": 64,
+      "id_count": 65,
       "reference_count": 89,
       "image_count": 22
     }
@@ -193,12 +193,12 @@
     },
     {
       "path": "data/live_publication_status.json",
-      "bytes": 30999,
+      "bytes": 45353,
       "top_level_type": "dict"
     },
     {
       "path": "data/mirror_parity.json",
-      "bytes": 91667,
+      "bytes": 69773,
       "top_level_type": "dict"
     },
     {
@@ -228,7 +228,7 @@
     },
     {
       "path": "data/publication_audit.json",
-      "bytes": 6997,
+      "bytes": 6796,
       "top_level_type": "dict"
     },
     {
@@ -278,7 +278,7 @@
     },
     {
       "path": "data/website_integrity.json",
-      "bytes": 11261,
+      "bytes": 11168,
       "top_level_type": "dict"
     },
     {

docs/index.html

@@ -307,7 +307,7 @@
       padding: 88px 0 96px;
       border-bottom: 1px solid var(--soft-line);
       background: rgba(2, 5, 2, 0.72);
-      scroll-margin-top: 138px;
+      scroll-margin-top: 132px;
     }
     main.tabbed > section[hidden] { display: none; }
     .project-tabs-shell {
@@ -364,6 +364,42 @@
     }
     .project-tab.active strong,
     .project-tab.active span { color: #020502; }
+    .section-tabs {
+      display: flex;
+      gap: 8px;
+      overflow-x: auto;
+      padding-top: 12px;
+      padding-bottom: 2px;
+      scrollbar-width: thin;
+      scrollbar-color: rgba(164, 242, 127, 0.42) rgba(7, 18, 7, 0.72);
+    }
+    .section-tab {
+      appearance: none;
+      flex: 0 0 auto;
+      min-height: 38px;
+      border: 1px solid rgba(164, 242, 127, 0.18);
+      border-radius: 6px;
+      background: rgba(7, 18, 7, 0.78);
+      color: #c8d5c2;
+      cursor: pointer;
+      padding: 8px 12px;
+      font-family: var(--font-ui);
+      font-size: 13px;
+      font-weight: 660;
+      line-height: 1.15;
+      white-space: nowrap;
+      transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1), border-color 220ms cubic-bezier(0.16, 1, 0.3, 1), background 220ms cubic-bezier(0.16, 1, 0.3, 1), color 220ms cubic-bezier(0.16, 1, 0.3, 1);
+    }
+    .section-tab:hover {
+      transform: translateY(-1px);
+      border-color: rgba(164, 242, 127, 0.42);
+      color: var(--ink);
+    }
+    .section-tab.active {
+      border-color: rgba(164, 242, 127, 0.82);
+      background: rgba(164, 242, 127, 0.14);
+      color: var(--green);
+    }
     #overview { order: 1; }
     #reading-path { order: 2; }
     #dataset-card { order: 3; }
@@ -1457,6 +1493,7 @@
       .hero-inner, .two-col { grid-template-columns: 1fr; }
       .hero-inner { min-height: 0; }
       .project-tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
+      .section-tabs { padding-top: 10px; }
       .hero-stats, .models, .task-grid, .artifact-grid, .evidence-grid, .reading-grid, .snapshot-grid, .boundary-strip, .callout-row, .direction-grid, .baseline-strip, .extension-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
       .task-player { grid-template-columns: 1fr; }
       .task-selector { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@@ -1488,6 +1525,15 @@
         font-size: 10px;
         line-height: 1.25;
       }
+      .section-tabs {
+        gap: 6px;
+        padding-top: 8px;
+      }
+      .section-tab {
+        min-height: 34px;
+        padding: 7px 10px;
+        font-size: 12px;
+      }
       main > section { scroll-margin-top: 246px; }
       .hero-stats, .models, .task-grid, .artifact-grid, .evidence-grid, .reading-grid, .snapshot-grid, .boundary-strip, .chart-grid, .callout-row, .direction-grid, .baseline-strip, .extension-grid, .walk-flow, .flow-steps, .storyboard-steps, .task-selector, .atlas-rows { grid-template-columns: 1fr; }
       .artifact-group { padding: 16px; }
@@ -1595,25 +1641,26 @@
       <div class="wrap project-tabs" role="tablist" aria-label="Project sections">
         <button type="button" class="project-tab active" id="tab-start" role="tab" data-tab-key="start" data-default-section="overview" aria-selected="true" aria-pressed="true" aria-controls="overview reading-path">
           <strong>Start</strong>
-          <span>overview, reading path, scope</span>
+          <span>project overview and scope</span>
         </button>
         <button type="button" class="project-tab" id="tab-data" role="tab" data-tab-key="data" data-default-section="dataset-card" aria-selected="false" aria-pressed="false" aria-controls="dataset-card suite walkthroughs tasks" tabindex="-1">
           <strong>Data & Tasks</strong>
-          <span>dataset, modalities, 12 tasks</span>
+          <span>dataset sample and task suite</span>
         </button>
         <button type="button" class="project-tab" id="tab-method" role="tab" data-tab-key="method" data-default-section="pipeline" aria-selected="false" aria-pressed="false" aria-controls="protocol pipeline architectures features" tabindex="-1">
           <strong>Method</strong>
-          <span>pipeline, protocol, features</span>
+          <span>pipeline and model design</span>
         </button>
         <button type="button" class="project-tab" id="tab-results" role="tab" data-tab-key="results" data-default-section="models" aria-selected="false" aria-pressed="false" aria-controls="models neural directions extensions diagnostics" tabindex="-1">
           <strong>Results</strong>
-          <span>baselines, directions, probes</span>
+          <span>baselines and research tracks</span>
         </button>
         <button type="button" class="project-tab" id="tab-resources" role="tab" data-tab-key="resources" data-default-section="artifacts" aria-selected="false" aria-pressed="false" aria-controls="evidence artifacts omni-relay run" tabindex="-1">
           <strong>Resources</strong>
-          <span>artifacts, scale-up, runbook</span>
+          <span>artifacts and scale-up path</span>
         </button>
       </div>
+      <div class="wrap section-tabs" id="sectionTabs" role="tablist" aria-label="Sections inside the selected project tab"></div>
     </div>
 
     <section id="overview" data-project-tab="start" role="tabpanel" aria-labelledby="tab-start" tabindex="-1">
@@ -2408,17 +2455,109 @@ python scripts/validate_publication_package.py</code></pre>
     ];
     const tabSections = Array.from(document.querySelectorAll("[data-project-tab]"));
     const tabButtons = Array.from(document.querySelectorAll("[data-tab-key]"));
+    const sectionTabs = document.getElementById("sectionTabs");
+    const sectionConfig = [
+      { id: "overview", label: "Project Overview" },
+      { id: "reading-path", label: "Reading Path" },
+      { id: "dataset-card", label: "Dataset Card" },
+      { id: "suite", label: "12-Task Map" },
+      { id: "walkthroughs", label: "Interactive Walkthrough" },
+      { id: "tasks", label: "Task Cards" },
+      { id: "pipeline", label: "Pipeline" },
+      { id: "protocol", label: "Evaluation Protocol" },
+      { id: "architectures", label: "Model Architectures" },
+      { id: "features", label: "Feature Blocks" },
+      { id: "models", label: "Minimal Baselines" },
+      { id: "neural", label: "Neural Heads" },
+      { id: "directions", label: "Four Directions" },
+      { id: "extensions", label: "Extension Probes" },
+      { id: "diagnostics", label: "Diagnostic Charts" },
+      { id: "artifacts", label: "Artifact Library" },
+      { id: "evidence", label: "Research Progress" },
+      { id: "omni-relay", label: "Omni Scale-Up" },
+      { id: "run", label: "Reproduce" }
+    ];
+    const sectionLabels = Object.fromEntries(sectionConfig.map((section) => [section.id, section.label]));
     const sectionTabMap = Object.fromEntries(tabSections.map((section) => [section.id, section.dataset.projectTab]));
     const tabDefaultSections = Object.fromEntries(
       tabButtons.map((button) => [button.dataset.tabKey, button.dataset.defaultSection])
     );
 
+    function orderedSectionsForTab(tabKey) {
+      const configured = sectionConfig
+        .map(({ id }) => document.getElementById(id))
+        .filter((section) => section?.dataset.projectTab === tabKey);
+      const configuredIds = new Set(configured.map((section) => section.id));
+      const unconfigured = tabSections.filter((section) => (
+        section.dataset.projectTab === tabKey && !configuredIds.has(section.id)
+      ));
+      return [...configured, ...unconfigured];
+    }
+
+    function labelForSection(section) {
+      return sectionLabels[section.id] ||
+        section.querySelector("h2")?.textContent?.replace(/\.$/, "") ||
+        section.id.replaceAll("-", " ");
+    }
+
+    function renderSectionTabs(tabKey, activeSectionId) {
+      if (!sectionTabs) return;
+      const sections = orderedSectionsForTab(tabKey);
+      sectionTabs.replaceChildren();
+      sections.forEach((section, index) => {
+        const button = document.createElement("button");
+        const active = section.id === activeSectionId;
+        button.type = "button";
+        button.className = `section-tab${active ? " active" : ""}`;
+        button.id = `section-tab-${section.id}`;
+        button.dataset.sectionTarget = section.id;
+        button.setAttribute("role", "tab");
+        button.setAttribute("aria-controls", section.id);
+        button.setAttribute("aria-selected", active ? "true" : "false");
+        button.setAttribute("aria-pressed", active ? "true" : "false");
+        button.tabIndex = active ? 0 : -1;
+        button.textContent = labelForSection(section);
+        button.addEventListener("click", () => {
+          setProjectTab(tabKey, {
+            targetId: section.id,
+            pushHash: true,
+            scroll: true,
+            smooth: true
+          });
+        });
+        button.addEventListener("keydown", (event) => {
+          if (!["ArrowRight", "ArrowDown", "ArrowLeft", "ArrowUp", "Home", "End"].includes(event.key)) return;
+          event.preventDefault();
+          const lastIndex = sections.length - 1;
+          let nextIndex = index;
+          if (event.key === "ArrowRight" || event.key === "ArrowDown") nextIndex = index === lastIndex ? 0 : index + 1;
+          if (event.key === "ArrowLeft" || event.key === "ArrowUp") nextIndex = index === 0 ? lastIndex : index - 1;
+          if (event.key === "Home") nextIndex = 0;
+          if (event.key === "End") nextIndex = lastIndex;
+          const nextSection = sections[nextIndex];
+          const nextButton = sectionTabs.querySelector(`[data-section-target="${nextSection.id}"]`);
+          nextButton?.focus();
+          setProjectTab(tabKey, {
+            targetId: nextSection.id,
+            pushHash: true,
+            scroll: true,
+            smooth: true
+          });
+        });
+        sectionTabs.appendChild(button);
+      });
+    }
+
     function setProjectTab(tabKey, options = {}) {
       const fallbackTab = tabDefaultSections[tabKey] ? tabKey : "start";
-      const targetId = options.targetId || tabDefaultSections[fallbackTab] || "overview";
+      const requestedId = options.targetId || tabDefaultSections[fallbackTab] || "overview";
+      const targetId = sectionTabMap[requestedId] === fallbackTab
+        ? requestedId
+        : tabDefaultSections[fallbackTab] || "overview";
       document.getElementById("main").dataset.activeTab = fallbackTab;
+      document.getElementById("main").dataset.activeSection = targetId;
       tabSections.forEach((section) => {
-        section.hidden = section.dataset.projectTab !== fallbackTab;
+        section.hidden = section.id !== targetId;
       });
       tabButtons.forEach((button) => {
         const active = button.dataset.tabKey === fallbackTab;
@@ -2427,6 +2566,7 @@ python scripts/validate_publication_package.py</code></pre>
         button.setAttribute("aria-pressed", active ? "true" : "false");
         button.tabIndex = active ? 0 : -1;
       });
+      renderSectionTabs(fallbackTab, targetId);
       if (options.pushHash) {
         history.pushState(null, "", `#${targetId}`);
       }