diff --git a/pixi.toml b/pixi.toml
index f348e64be..99c401c05 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -114,10 +114,14 @@ mkdocstrings = "*"
 mkdocstrings-python = "*"
 mkdocs-gen-files = "*"
 mkdocs-literate-nav = "*"
+nbsite = ">=0.10.0a0"
 
 [feature.doc.tasks]
 # Updated tasks to use zensical instead of mkdocs
-docs-build = { cmd = 'zensical build --clean', depends-on = ['install'] }
+_docs-build-site = { cmd = 'zensical build --clean', depends-on = ['install'] }
+# llms.txt is written into builtdocs, so it has to run after --clean has wiped it.
+_docs-markdown = 'python -m nbsite build-llms --config scripts/llms_config.py'
+docs-build = { depends-on = ['_docs-build-site', '_docs-markdown'] }
 docs-serve = { cmd = 'zensical serve', depends-on = ['install'] }
 docs-clean = { cmd = 'rm -rf builtdocs', depends-on = ['install'] }
 
diff --git a/scripts/llms_config.py b/scripts/llms_config.py
new file mode 100644
index 000000000..bac866d39
--- /dev/null
+++ b/scripts/llms_config.py
@@ -0,0 +1,79 @@
+"""Config for building Lumen markdown docs and its developer-facing llms.txt."""
+
+from pathlib import Path
+
+from nbsite.scripts import LlmsBuildConfig, LlmsSection, MarkdownSource
+
+ROOT = Path(__file__).parent.parent
+DOCS_DIR = ROOT / "docs"
+BUILTDOCS_DIR = ROOT / "builtdocs"
+OUTPUT_DIR = BUILTDOCS_DIR / "markdown"
+
+DEVELOPMENT_PAGES = {
+    Path("contributing.md"): "Contributing",
+    Path("extending.md"): "Extending Lumen",
+}
+ARCHITECTURE_PAGES = {
+    Path("configuration/context.md"): "Context",
+    Path("configuration/agents.md"): "Agents",
+    Path("configuration/coordinators.md"): "Coordinators",
+    Path("configuration/tools.md"): "Tools",
+    Path("configuration/spec/customization.md"): "Custom Components",
+}
+API_PAGES = {
+    Path("reference/api.md"): "Overview",
+    Path("reference/api/ai.md"): "AI",
+    Path("reference/api/ai/agents.md"): "AI Agents",
+    Path("reference/api/ai/coordinator.md"): "AI Coordinator",
+    Path("reference/api/ai/core.md"): "AI Core",
+    Path("reference/api/ai/models.md"): "AI Models",
+    Path("reference/api/ai/tools.md"): "AI Tools",
+    Path("reference/api/pipeline.md"): "Pipeline",
+    Path("reference/api/sources.md"): "Sources",
+    Path("reference/api/transforms.md"): "Transforms",
+    Path("reference/api/views.md"): "Views",
+}
+
+
+def _section(title: str, description: str, pages: dict[Path, str]) -> LlmsSection:
+    return LlmsSection(
+        title=title,
+        description=description,
+        path_prefix=Path("."),
+        path_filter=pages.__contains__,
+        label_builder=pages.__getitem__,
+    )
+
+
+CONFIG = LlmsBuildConfig(
+    project_title="Lumen",
+    project_description=(
+        "Developer documentation for contributing to and extending Lumen, an extensible "
+        "framework for building data applications and AI-powered data workflows."
+    ),
+    markdown_root=OUTPUT_DIR,
+    llms_output_path=BUILTDOCS_DIR / "llms.txt",
+    markdown_base_url="/markdown",
+    sources=(MarkdownSource(
+        source_dir=DOCS_DIR,
+        output_dir=OUTPUT_DIR,
+        exclude_files=(Path("releases.md"),),
+    ),),
+    sections=(
+        _section(
+            "Development",
+            "Repository setup, contribution workflow, and extension points.",
+            DEVELOPMENT_PAGES,
+        ),
+        _section(
+            "Architecture",
+            "Core concepts for Lumen's agent and component architecture.",
+            ARCHITECTURE_PAGES,
+        ),
+        _section(
+            "API Reference",
+            "Python APIs for Lumen pipelines, sources, transforms, views, and AI components.",
+            API_PAGES,
+        ),
+    ),
+)
diff --git a/zensical.toml b/zensical.toml
index e9dd8803b..9196f7887 100644
--- a/zensical.toml
+++ b/zensical.toml
@@ -26,9 +26,10 @@ nav = [
       {"SaaS Company Report Dashboard" = "examples/tutorials/saas_company_report_dashboard.md"},
       {"Census Data AI Explorer" = "examples/tutorials/census_data_ai_explorer.md"},
       {"Mesonet Weather Explorer" = "examples/tutorials/mesonet_weather_explorer.md"},
-      {"Weather API Explorer" = "examples/tutorials/weather_openapi_explorer.md"},
-      {"Massive Stock Explorer" = "examples/tutorials/massive_stock_explorer.md"},
-      {"Build Dashboard with Spec" = "examples/tutorials/penguins_dashboard_spec.md"}
+      {"Weather API Explorer (OpenAPI)" = "examples/tutorials/weather_openapi_explorer.md"},
+      {"Stock Market Explorer" = "examples/tutorials/massive_stock_explorer.md"},
+      {"Build Dashboard with Spec" = "examples/tutorials/penguins_dashboard_spec.md"},
+      {"SaaS Executive Dashboard" = "examples/tutorials/saas_metrics_reports.md"}
     ]},
     {"Gallery" = [
       {"Overview" = "examples/gallery/index.md"},