Refactor CI configuration and documentation; improve error handling in KDTree functions

.github/workflows/ci.yml

@@ -8,6 +8,7 @@ on:
 
 permissions:
   contents: read
+  actions: write
 
 jobs:
   build-test-wasm:

.golangci.yml

@@ -17,5 +17,4 @@ issues:
         - errcheck
 linters-settings:
   errcheck:
-    # Be pragmatic: don't require checking of Close for defer patterns in tests/examples.
+    # Using default settings; test file exclusions are handled by exclude-rules above.
-    # (Keep defaults; exclusions above handle test files.)

CODE_OF_CONDUCT.md

@@ -2,8 +2,8 @@
 
 This project has adopted the Contributor Covenant Code of Conduct.
 
-- Version: https://www.contributor-covenant.org/version/2/1/code_of_conduct/
+- Version: [Contributor Covenant v2.1](https://www.contributor-covenant.org/version/2/1/code_of_conduct/)
-- FAQ: https://www.contributor-covenant.org/faq
+- FAQ: [Contributor Covenant FAQ](https://www.contributor-covenant.org/faq)
-- Translations: https://www.contributor-covenant.org/translations
+- Translations: [Available Translations](https://www.contributor-covenant.org/translations)
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the maintainers via GitHub issues or by email listed on the repository profile. All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances.

CONTRIBUTING.md

@@ -4,7 +4,7 @@ Thanks for your interest in contributing! This document describes how to build,
 
 ## Getting started
 
-- Go 1.22+ (1.23 preferred)
+- Go 1.23+
 - `git clone https://github.com/Snider/Poindexter`
 - `cd Poindexter`
 

Makefile

@@ -147,3 +147,7 @@ docs-serve: ## Serve MkDocs locally (requires mkdocs-material)
 .PHONY: docs-build
 docs-build: ## Build MkDocs site into site/
 	$(MKDOCS) build
+
+.PHONY: clean
+clean: ## Remove generated files and directories
+	rm -rf $(DIST_DIR) $(COVEROUT) $(COVERHTML) $(BENCHOUT)

docs/api.md

@@ -470,7 +470,9 @@ func Build4DWithStats[T any](
 ) ([]KDPoint[T], error)
 ```
 
+
 #### Example (2D)
+
 ```go
 // Compute stats once over your baseline set
 stats := poindexter.ComputeNormStats2D(peers,

docs/dht-best-ping.md

@@ -101,6 +101,7 @@ func main() {
 ### Why does querying with `[0]` work?
 We use Euclidean distance in 1D, so `distance = |ping - target|`. With target `0`, minimizing the distance is equivalent to minimizing the ping itself.
 
+
 ### Extending the metric/space
 - Multi-objective: encode more routing features (lower is better) as extra dimensions, e.g. `[ping_ms, hops, queue_delay_ms]`.
 - Metric choice:
@@ -109,6 +110,7 @@ We use Euclidean distance in 1D, so `distance = |ping - target|`. With target `0
   - `ChebyshevDistance` (L∞): cares about the worst dimension.
 - Normalization: when mixing units (ms, hops, km), normalize or weight dimensions so the metric reflects your priority.
 
+
 ### Notes
 - This KDTree currently uses an internal linear scan for queries. The API is stable and designed so it can be swapped to use `gonum.org/v1/gonum/spatial/kdtree` under the hood later for sub-linear queries on large datasets.
 - IDs are optional but recommended for O(1)-style deletes; keep them unique per tree.

docs/getting-started.md

@@ -123,5 +123,5 @@ func main() {
 
 - Check out the [API Reference](api.md) for detailed documentation
 - Try the example: [Find the best (lowest‑ping) DHT peer](dht-best-ping.md)
-- Explore multi-dimensional KDTree over ping/hops/geo/score: [Multi-Dimensional KDTree (DHT)](kdtree-multidimensional.md)
+- Explore multidimensional KDTree over ping/hops/geo/score: [Multidimensional KDTree (DHT)](kdtree-multidimensional.md)
 - Read about the [License](license.md)

docs/kdtree-multidimensional.md

@@ -237,23 +237,32 @@ func main() {
     // Initial 2‑D build (ping + hops)
     weights2 := [2]float64{1.0, 1.0}
     invert2  := [2]bool{false, false}
-    pts, _ := poindexter.Build2D(
+
+    // Compute normalization stats once over your baseline set
+    stats := poindexter.ComputeNormStats2D(
+        peers,
+        func(p Peer) float64 { return p.PingMS },
+        func(p Peer) float64 { return p.Hops },
+    )
+
+    // Build using the precomputed stats so future inserts share the same scale
+    pts, _ := poindexter.Build2DWithStats(
         peers,
         func(p Peer) string { return p.ID },
         func(p Peer) float64 { return p.PingMS },
         func(p Peer) float64 { return p.Hops },
-        weights2, invert2,
+        weights2, invert2, stats,
     )
     tree, _ := poindexter.NewKDTree(pts)
 
-    // Insert a new peer: rebuild its point using the same helper.
+    // Insert a new peer: reuse the same normalization stats to keep scale consistent
     newPeer := Peer{ID: "Z", PingMS: 12, Hops: 2}
-    addPts, _ := poindexter.Build2D(
+    addPts, _ := poindexter.Build2DWithStats(
         []Peer{newPeer},
         func(p Peer) string { return p.ID },
         func(p Peer) float64 { return p.PingMS },
         func(p Peer) float64 { return p.Hops },
-        weights2, invert2,
+        weights2, invert2, stats,
     )
     _ = tree.Insert(addPts[0])
 

docs/perf.md

@@ -16,7 +16,7 @@ Run them locally:
 go test -bench . -benchmem -run=^$ ./...
 ```
 
-GitHub Actions publishes benchmark artifacts for Go 1.22 and 1.23 on every push/PR. Look for artifacts named `bench-<go-version>.txt` in the CI run.
+GitHub Actions publishes benchmark artifacts for Go 1.23 on every push/PR. Look for artifacts named `bench-<go-version>.txt` in the CI run.
 
 ## What to expect (rule of thumb)
 

docs/wasm.md

@@ -27,7 +27,7 @@ To assemble the npm package folder with the built artifacts:
 make npm-pack
 ```
 
-This populates `npm/poindexter-wasm/` with `dist/`, license and readme files. You can then create a tarball for local testing:
+This populates `npm/poindexter-wasm/` with `dist/`, licence and readme files. You can then create a tarball for local testing:
 
 ```bash
 npm pack ./npm/poindexter-wasm

examples/dht_ping_1d/example_test.go

@@ -42,7 +42,8 @@ func TestExample1D(t *testing.T) {
 	if best.Value.Ping != 35 {
 		t.Fatalf("expected best ping 35ms, got %d", best.Value.Ping)
 	}
-	if d <= 0 {
+	// Distance from [0] to [35] should be 35
-		t.Fatalf("expected positive distance, got %v", d)
+	if d != 35 {
+		t.Fatalf("expected distance 35, got %v", d)
 	}
 }

examples/kdtree_2d_ping_hop/main.go

@@ -21,14 +21,23 @@ func main() {
 	}
 	weights := [2]float64{1.0, 1.0}
 	invert := [2]bool{false, false}
-	pts, _ := poindexter.Build2D(
+	pts, err := poindexter.Build2D(
 		peers,
 		func(p Peer2) string { return p.ID },
 		func(p Peer2) float64 { return p.PingMS },
 		func(p Peer2) float64 { return p.Hops },
 		weights, invert,
 	)
-	tr, _ := poindexter.NewKDTree(pts, poindexter.WithMetric(poindexter.ManhattanDistance{}))
+	if err != nil {
-	best, _, _ := tr.Nearest([]float64{0, 0.3})
+		panic(fmt.Sprintf("Build2D failed: %v", err))
+	}
+	tr, err := poindexter.NewKDTree(pts, poindexter.WithMetric(poindexter.ManhattanDistance{}))
+	if err != nil {
+		panic(fmt.Sprintf("NewKDTree failed: %v", err))
+	}
+	best, _, ok := tr.Nearest([]float64{0, 0.3})
+	if !ok {
+		panic("no nearest neighbour found")
+	}
 	fmt.Println("2D best:", best.ID)
 }

examples/kdtree_4d_ping_hop_geo_score/main.go

@@ -23,7 +23,7 @@ func main() {
 	}
 	weights := [4]float64{1.0, 0.7, 0.2, 1.2}
 	invert := [4]bool{false, false, false, true}
-	pts, _ := poindexter.Build4D(
+	pts, err := poindexter.Build4D(
 		peers,
 		func(p Peer4) string { return p.ID },
 		func(p Peer4) float64 { return p.PingMS },
@@ -32,7 +32,16 @@ func main() {
 		func(p Peer4) float64 { return p.Score },
 		weights, invert,
 	)
-	tr, _ := poindexter.NewKDTree(pts, poindexter.WithMetric(poindexter.EuclideanDistance{}))
+	if err != nil {
-	best, _, _ := tr.Nearest([]float64{0, weights[1] * 0.2, weights[2] * 0.3, 0})
+		panic(err)
+	}
+	tr, err := poindexter.NewKDTree(pts, poindexter.WithMetric(poindexter.EuclideanDistance{}))
+	if err != nil {
+		panic(err)
+	}
+	best, _, ok := tr.Nearest([]float64{0, weights[1] * 0.2, weights[2] * 0.3, 0})
+	if !ok {
+		panic("no nearest neighbour found")
+	}
 	fmt.Println("4D best:", best.ID)
 }

kdtree_helpers.go

@@ -246,7 +246,7 @@ func Build2DWithStats[T any](items []T, id func(T) string, f1, f2 func(T) float6
 		return nil, nil
 	}
 	if len(stats.Stats) != 2 {
-		return nil, nil
+		return nil, ErrStatsDimMismatch
 	}
 	pts := make([]KDPoint[T], len(items))
 	for i, it := range items {
@@ -317,7 +317,7 @@ func Build3DWithStats[T any](items []T, id func(T) string, f1, f2, f3 func(T) fl
 		return nil, nil
 	}
 	if len(stats.Stats) != 3 {
-		return nil, nil
+		return nil, ErrStatsDimMismatch
 	}
 	pts := make([]KDPoint[T], len(items))
 	for i, it := range items {
@@ -400,7 +400,7 @@ func Build4DWithStats[T any](items []T, id func(T) string, f1, f2, f3, f4 func(T
 		return nil, nil
 	}
 	if len(stats.Stats) != 4 {
-		return nil, nil
+		return nil, ErrStatsDimMismatch
 	}
 	pts := make([]KDPoint[T], len(items))
 	for i, it := range items {

kdtree_morecov_test.go

@@ -48,8 +48,8 @@ func TestDeleteByID_SwapDelete(t *testing.T) {
 	if ids["B"] {
 		t.Fatalf("B should not be present after delete")
 	}
-	if !ids["A"] && !ids["C"] {
+	if !ids["A"] || !ids["C"] {
-		t.Fatalf("expected either A or C to be nearest for respective queries: %v", ids)
+		t.Fatalf("expected both A and C to be found after deleting B, got: %v", ids)
 	}
 }
 

npm/poindexter-wasm/loader.js

@@ -74,7 +74,8 @@ export async function init(options = {}) {
   }
 
   // Run the Go program (it registers globals like pxNewTree, etc.)
-  await go.run(result.instance);
+  // Do not await: the Go WASM main may block (e.g., via select{}), so awaiting never resolves.
+  go.run(result.instance);
 
   const api = {
     version: async () => call('pxVersion'),