diff --git a/Cargo.lock b/Cargo.lock
index dd75574..4a32ba6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2311,7 +2311,7 @@ dependencies = [
 [[package]]
 name = "ruff_ruby_spo"
 version = "0.1.0"
-source = "git+https://github.com/AdaWorldAPI/ruff?branch=main#844b42aedbb8abdd8c3e2b45ff4ed644c37946d2"
+source = "git+https://github.com/AdaWorldAPI/ruff?branch=main#38f8a618cbcc4233d5bace17276f340d9c5638c3"
 dependencies = [
  "lib-ruby-parser",
  "ruff_spo_triplet",
@@ -2320,7 +2320,7 @@ dependencies = [
 [[package]]
 name = "ruff_spo_address"
 version = "0.1.0"
-source = "git+https://github.com/AdaWorldAPI/ruff?branch=main#844b42aedbb8abdd8c3e2b45ff4ed644c37946d2"
+source = "git+https://github.com/AdaWorldAPI/ruff?branch=main#38f8a618cbcc4233d5bace17276f340d9c5638c3"
 dependencies = [
  "ruff_spo_triplet",
 ]
@@ -2328,7 +2328,7 @@ dependencies = [
 [[package]]
 name = "ruff_spo_triplet"
 version = "0.1.0"
-source = "git+https://github.com/AdaWorldAPI/ruff?branch=main#844b42aedbb8abdd8c3e2b45ff4ed644c37946d2"
+source = "git+https://github.com/AdaWorldAPI/ruff?branch=main#38f8a618cbcc4233d5bace17276f340d9c5638c3"
 dependencies = [
  "serde",
  "serde_json",
diff --git a/crates/op-codegen-pipeline/src/lib.rs b/crates/op-codegen-pipeline/src/lib.rs
index 39de956..c7a1687 100644
--- a/crates/op-codegen-pipeline/src/lib.rs
+++ b/crates/op-codegen-pipeline/src/lib.rs
@@ -48,6 +48,11 @@ use ruff_spo_triplet::Triple as RuffTriple;
 #[cfg(feature = "ogar-emit")]
 pub mod ogar_consumer;
 
+/// Klickweg harvest bridge: run the Rails `navigates_to` harvest (ruff #62)
+/// over an OpenProject source tree to produce the board's navigation edges —
+/// the harvested source of what `op-server::nav::NAV_EDGES` bakes by hand.
+pub mod nav_harvest;
+
 // `lance_graph_contract::codegen_spine::TripletProjection` is implemented
 // on the projection type — we don't reference the trait directly here, only
 // its associated method, which keeps the import surface narrow.
diff --git a/crates/op-codegen-pipeline/src/nav_harvest.rs b/crates/op-codegen-pipeline/src/nav_harvest.rs
new file mode 100644
index 0000000..08d240d
--- /dev/null
+++ b/crates/op-codegen-pipeline/src/nav_harvest.rs
@@ -0,0 +1,91 @@
+//! Klickweg harvest bridge — Rails navigation topology into op-nexgen.
+//!
+//! Runs [`ruff_ruby_spo::extract_nav_edges`] (the two-shape Rails
+//! `navigates_to` harvest — ERB `link_to`/`button_to` clicks + controller
+//! `redirect_to` redirects, ruff #62) over an OpenProject Rails source tree
+//! and returns the navigation edges between served screens.
+//!
+//! This is the **harvested** source of the board's klickweg — the same
+//! screen-to-screen connectivity that `op-server::nav::NAV_EDGES` currently
+//! encodes **by hand** (derived from the OGAR `ClassView` association graph)
+//! and proves connected via the Core brick
+//! `lance_graph_contract::class_view::nav_is_fully_connected` (lance-graph
+//! #670/#673). When the OpenProject Rails source is present in the pipeline
+//! input, these harvested edges are the ground truth and `NAV_EDGES` is their
+//! baked mirror; `nav_harvest_probe` proves the harvest reproduces exactly
+//! that edge set on a synthetic fixture.
+//!
+//! ## Two vocabularies, one graph
+//!
+//! The harvest speaks Rails **resource** stems (`work_packages`, `projects`);
+//! op-server's `ClassView` graph speaks **concept** names (`ProjectWorkItem`,
+//! `Project`). The mapping is 1:1 ([`RESOURCE_TO_CONCEPT`], the inverse of
+//! `op-server::nav::SCREEN_UNIVERSE`), so the connectivity graph is identical
+//! under it — a `(work_packages → projects)` harvested edge IS the
+//! `(ProjectWorkItem → Project)` ClassView edge.
+
+use std::collections::BTreeSet;
+use std::path::Path;
+
+use ruff_ruby_spo::{
+    extract_nav_edges, extract_nav_edges_with_report, NavScanReport, NavVocab, RubyNavEdge,
+};
+
+/// The OpenProject board's served screens, as Rails resource stems — the
+/// closed nav vocabulary. 1:1 with `op-server::nav::SCREEN_UNIVERSE` (which
+/// names the same screens as `ClassView` concepts; see [`RESOURCE_TO_CONCEPT`]).
+pub const OPENPROJECT_SCREENS: &[&str] = &["work_packages", "projects"];
+
+/// Rails resource stem → op-server `ClassView` concept name. The 1:1 bridge
+/// between the harvest vocabulary and `op-server::nav::SCREEN_UNIVERSE`
+/// (`["ProjectWorkItem", "Project"]`).
+pub const RESOURCE_TO_CONCEPT: &[(&str, &str)] = &[
+    ("work_packages", "ProjectWorkItem"),
+    ("projects", "Project"),
+];
+
+/// Harvest the klickweg edges from a Rails `app_root`, restricted to the
+/// OpenProject served screens ([`OPENPROJECT_SCREENS`]).
+#[must_use]
+pub fn harvest_klickweg(app_root: &Path) -> Vec<RubyNavEdge> {
+    extract_nav_edges(app_root, &openproject_vocab())
+}
+
+/// Like [`harvest_klickweg`] but also returns the [`NavScanReport`] ledger
+/// (files scanned, files with edges, raw target references — the honest
+/// denominator).
+#[must_use]
+pub fn harvest_klickweg_with_report(app_root: &Path) -> (Vec<RubyNavEdge>, NavScanReport) {
+    extract_nav_edges_with_report(app_root, &openproject_vocab())
+}
+
+/// The distinct `(source, target)` screen pairs of a harvested edge set — the
+/// connectivity graph, shape-agnostic (ERB-click and controller-redirect
+/// edges between the same two screens collapse to one pair). This is what
+/// must match `op-server::nav::NAV_EDGES`' connectivity.
+#[must_use]
+pub fn klickweg_pairs(edges: &[RubyNavEdge]) -> BTreeSet<(String, String)> {
+    edges
+        .iter()
+        .map(|e| (e.source.clone(), e.target.clone()))
+        .collect()
+}
+
+/// The op-server `ClassView` concept name for a Rails resource stem, or
+/// `None` if it is not a served screen.
+#[must_use]
+pub fn concept_for(resource: &str) -> Option<&'static str> {
+    RESOURCE_TO_CONCEPT
+        .iter()
+        .find(|(r, _)| *r == resource)
+        .map(|(_, c)| *c)
+}
+
+fn openproject_vocab() -> NavVocab {
+    NavVocab {
+        screens: OPENPROJECT_SCREENS
+            .iter()
+            .map(|s| (*s).to_string())
+            .collect(),
+    }
+}
diff --git a/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/controllers/work_packages_controller.rb b/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/controllers/work_packages_controller.rb
new file mode 100644
index 0000000..2cfb443
--- /dev/null
+++ b/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/controllers/work_packages_controller.rb
@@ -0,0 +1,10 @@
+class WorkPackagesController < ApplicationController
+  def create
+    @work_package = WorkPackage.new(wp_params)
+    if @work_package.save
+      redirect_to projects_path
+    else
+      render :new
+    end
+  end
+end
diff --git a/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/views/projects/show.html.erb b/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/views/projects/show.html.erb
new file mode 100644
index 0000000..b7deb18
--- /dev/null
+++ b/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/views/projects/show.html.erb
@@ -0,0 +1,2 @@
+<h1><%= @project.name %></h1>
+<%= link_to "Work packages", work_packages_path(project_id: @project.id) %>
diff --git a/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/views/work_packages/index.html.erb b/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/views/work_packages/index.html.erb
new file mode 100644
index 0000000..fcffc02
--- /dev/null
+++ b/crates/op-codegen-pipeline/tests/fixtures/rails_nav/app/views/work_packages/index.html.erb
@@ -0,0 +1,7 @@
+<h1>Work packages</h1>
+<ul>
+  <% @work_packages.each do |wp| %>
+    <li><%= wp.subject %></li>
+  <% end %>
+</ul>
+<%= link_to "Back to project", project_path(@project) %>
diff --git a/crates/op-codegen-pipeline/tests/nav_harvest_probe.rs b/crates/op-codegen-pipeline/tests/nav_harvest_probe.rs
new file mode 100644
index 0000000..e2fabdf
--- /dev/null
+++ b/crates/op-codegen-pipeline/tests/nav_harvest_probe.rs
@@ -0,0 +1,93 @@
+//! Probe: the Rails `navigates_to` harvest (ruff #62) reproduces the board's
+//! klickweg — the same screen graph `op-server::nav::NAV_EDGES` bakes by hand.
+//!
+//! Drives a synthetic OpenProject Rails fixture (`tests/fixtures/rails_nav/`,
+//! no proprietary source) through `op_codegen_pipeline::nav_harvest` and
+//! asserts:
+//!   1. the harvested `(source, target)` screen pairs are EXACTLY the
+//!      OpenProject board klickweg (`work_packages ↔ projects`), both
+//!      directions — proving the harvest yields the connectivity that
+//!      `op-server::nav::NAV_EDGES` encodes by hand;
+//!   2. both harvest shapes fire (ERB `link_to` click + controller
+//!      `redirect_to` redirect);
+//!   3. the resource→concept bridge maps every harvested screen onto an
+//!      `op-server::nav::SCREEN_UNIVERSE` concept.
+
+use std::path::PathBuf;
+
+use op_codegen_pipeline::nav_harvest::{
+    concept_for, harvest_klickweg_with_report, klickweg_pairs, OPENPROJECT_SCREENS,
+};
+use ruff_ruby_spo::NavShape;
+
+fn fixture_root() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("tests/fixtures/rails_nav")
+}
+
+/// The harvested screen pairs are exactly the OpenProject board klickweg —
+/// `work_packages ↔ projects`, both directions.
+#[test]
+fn harvest_reproduces_the_board_klickweg() {
+    let (edges, report) = harvest_klickweg_with_report(&fixture_root());
+    let pairs = klickweg_pairs(&edges);
+
+    let expected: std::collections::BTreeSet<(String, String)> =
+        [("work_packages", "projects"), ("projects", "work_packages")]
+            .iter()
+            .map(|(s, t)| ((*s).to_string(), (*t).to_string()))
+            .collect();
+
+    assert_eq!(
+        pairs, expected,
+        "harvested klickweg must be exactly work_packages <-> projects; got {edges:?}"
+    );
+
+    // The ledger accounts for the fixture: 2 ERB views + 1 controller, every
+    // file producing at least one edge.
+    assert_eq!(report.erb_files, 2, "{report:?}");
+    assert_eq!(report.controller_files, 1, "{report:?}");
+    assert_eq!(report.files_with_edges, 3, "{report:?}");
+}
+
+/// Both harvest shapes fire: the ERB `link_to` click edges AND the controller
+/// `redirect_to` redirect edge are all present (Ruby's two-shape harvest, not
+/// a single body-walk).
+#[test]
+fn both_harvest_shapes_are_present() {
+    let (edges, _) = harvest_klickweg_with_report(&fixture_root());
+
+    assert!(
+        edges.iter().any(|e| e.shape == NavShape::ErbClick),
+        "expected at least one ERB click edge: {edges:?}"
+    );
+    assert!(
+        edges
+            .iter()
+            .any(|e| e.shape == NavShape::ControllerRedirect),
+        "expected the controller redirect edge (work_packages -> projects): {edges:?}"
+    );
+
+    // The redirect edge specifically is work_packages -> projects.
+    assert!(
+        edges.iter().any(|e| e.shape == NavShape::ControllerRedirect
+            && e.source == "work_packages"
+            && e.target == "projects"),
+        "controller redirect must be work_packages -> projects: {edges:?}"
+    );
+}
+
+/// Every served screen maps 1:1 onto an `op-server::nav::SCREEN_UNIVERSE`
+/// concept — the harvest (resource-stem) and the ClassView graph
+/// (concept-name) speak the same connectivity graph under the bridge.
+#[test]
+fn every_screen_bridges_to_a_classview_concept() {
+    for resource in OPENPROJECT_SCREENS {
+        assert!(
+            concept_for(resource).is_some(),
+            "served screen {resource} has no ClassView concept in RESOURCE_TO_CONCEPT"
+        );
+    }
+    assert_eq!(concept_for("work_packages"), Some("ProjectWorkItem"));
+    assert_eq!(concept_for("projects"), Some("Project"));
+    assert_eq!(concept_for("not_a_screen"), None);
+}
diff --git a/crates/op-server/src/nav.rs b/crates/op-server/src/nav.rs
index 6565982..8577c02 100644
--- a/crates/op-server/src/nav.rs
+++ b/crates/op-server/src/nav.rs
@@ -77,6 +77,17 @@ pub fn screen_id(concept: &str) -> Option<u8> {
 /// class; `nav_edges_match_static_table` cross-checks this table against the
 /// live derivation so it can never silently drift. `inputs` is `&'static`
 /// (the Core edge shape), so this is a plain `const` manifest.
+///
+/// **Baked mirror of the harvest.** This table is the hand-authored (from the
+/// `ClassView` association graph) equivalent of what
+/// `op_codegen_pipeline::nav_harvest::harvest_klickweg` produces from the
+/// OpenProject Rails source via the `ruff_ruby_spo` `navigates_to` harvest
+/// (ruff #62). `op-codegen-pipeline`'s `nav_harvest_probe` proves the harvest
+/// yields exactly the `work_packages ↔ projects` klickweg these edges encode
+/// (`RESOURCE_TO_CONCEPT` bridges the Rails resource stems to the
+/// `ProjectWorkItem`/`Project` concepts here). Once the OpenProject source is
+/// in the pipeline input, this manifest regenerates from that harvest rather
+/// than being hand-authored.
 pub const NAV_EDGES: &[ComputeEdge] = &[
     // ProjectWorkItem.project (belongs_to) → Project
     ComputeEdge {