Add GUI Joinery panel (Phase B) + chamfers

GUI feature panel (gui/feature_panel.py), a "Joinery" tab beside Parts:
- Add buttons (Tenon/Mortise/Hole/Slot/Chamfer) drop a sensibly-sized feature
  on the selected board (add-with-default), then edit fields (face, along,
  across, width, height, depth, diameter) live; a feature list to pick which to
  edit; Delete. controller.active_feature tracks the one being edited, with
  size defaults derived from the board (controller._feature_defaults).

Chamfers (edge bevels):
- New EDGE_KINDS={"chamfer"}; geometry._apply_chamfer selects the edges around a
  face and bevels them with build123d chamfer(), clamped + try/except so an
  over-sized bevel can't crash the build. Verified: end + top-edge chamfers
  render and reduce volume.

66 tests pass (added chamfer volume + oversize-fallback). Verified GUI imports;
live window still needs a real display.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -95,14 +95,16 @@ pytest                            # 25 tests
    B is aligned to A's reference corner (top faces level + one side flush) rather
    than centered. The flush corner is fixed (A's +width/+thick side; no per-join
    choice of which corner / centered).
-2. **Joinery features** (`Feature` on each `Part`) are parametric booleans applied
-   in `geometry.part_solid`: `tenon` adds a protruding tongue (fuse); `mortise`,
-   `hole`, `slot`, `dado`, `rabbet` cut into a chosen face. The viewport
-   tessellates featured boards via build123d (plain boards stay fast pyvista
-   boxes). CLI: `feature/feature-edit/feature-delete/features`; voice:
-   `wood-feature`/`wood-feature-delete`. Not yet: **chamfers/bevels** (need edge
-   selection, not a box/cylinder cut), countersinks, and the **GUI feature panel**
-   (add/edit features by clicking — currently CLI/voice only).
+2. **Joinery features** (`Feature` on each `Part`) are parametric ops applied in
+   `geometry.part_solid`: `tenon` fuses a protruding tongue; `mortise`/`hole`/
+   `slot`/`dado`/`rabbet` cut a box/cylinder into a face; `chamfer` bevels the
+   edges around a face via build123d `chamfer()` (handled specially —
+   `_apply_chamfer`, with a try/except fallback for over-sized bevels). The
+   viewport tessellates featured boards (plain boards stay fast pyvista boxes).
+   Edit paths: CLI `feature/feature-edit/feature-delete/features`; voice
+   `wood-feature`/`wood-feature-delete`; **GUI Joinery tab** (`feature_panel.py`)
+   — add-with-default then edit fields; `controller.active_feature` is the one
+   being edited. Not yet: countersinks, and click-a-face-to-place in the GUI.
 2. **Latency** ~7–13s per utterance (one `claude -p` call).
 3. Voice path (`--voice`) reuses `dictate`; the driver loop is hardened against
    failures but the mic path isn't exercised in the unit tests.

src/woodshop/geometry.py

@@ -68,6 +68,35 @@ def _feature_solid_local(feat: Feature, L: float, w: float, t: float):
     return Pos(*c) * box, (feat.kind != "tenon")
 
 
+def _face_plane(face: str, L: float, w: float, t: float):
+    """(axis index, coordinate) of a face's plane, for selecting its edges."""
+    return {
+        "top": (2, t / 2), "bottom": (2, -t / 2),
+        "right": (1, w / 2), "left": (1, -w / 2),
+        "end_b": (0, L), "end_a": (0, 0.0),
+    }[face]
+
+
+def _apply_chamfer(solid, feat: Feature, L: float, w: float, t: float):
+    """Bevel the edges around the feature's face by width_in."""
+    from build123d import chamfer
+
+    axis, value = _face_plane(feat.face, L, w, t)
+    size = feat.width_in or min(t, w) / 3
+
+    def coord(e):
+        c = e.center()
+        return (c.X, c.Y, c.Z)[axis]
+
+    edges = [e for e in solid.edges() if abs(coord(e) - value) < 1e-3]
+    if not edges:
+        return solid
+    try:
+        return chamfer(edges, min(size, min(t, w) / 2 - 1e-3))
+    except Exception:
+        return solid  # over-sized / invalid chamfer: leave the board unbevelled
+
+
 def part_solid(part: Part):
     from build123d import Box, Pos, Rot
 
@@ -75,7 +104,10 @@ def part_solid(part: Part):
     thickness, width = part.section_in
     solid = Pos(length / 2, 0, 0) * Box(length, width, thickness)  # local, start at origin
 
-    for feat in part.features:                   # apply joinery as booleans
+    for feat in part.features:                   # apply joinery
+        if feat.kind == "chamfer":
+            solid = _apply_chamfer(solid, feat, length, width, thickness)
+            continue
         fsolid, is_cut = _feature_solid_local(feat, length, width, thickness)
         solid = (solid - fsolid) if is_cut else (solid + fsolid)
 

src/woodshop/gui/controller.py

@@ -73,6 +73,7 @@ class Controller(QObject):
         self.scene = Scene.load(self.scene_path)
         self._schemas: str | None = None
         self.selected: list[str] = [self.scene.selection] if self.scene.selection else []
+        self.active_feature: str | None = None   # feature currently being edited
 
     # ----- persistence / notify ----------------------------------------
     def save(self) -> None:
@@ -189,6 +190,70 @@ class Controller(QObject):
     def rotate(self, ref=None, yaw=None, tilt=None, roll=None):
         self._do(lambda: f"Oriented {self.scene.orient(ref, yaw=yaw, tilt=tilt, roll=roll).id}.")
 
+    # ----- joinery features --------------------------------------------
+    def _feature_defaults(self, kind: str, part) -> dict:
+        """Sensible starting dimensions derived from the board's size."""
+        t, w = part.section_in
+        L = part.length_in
+        if kind == "tenon":
+            return dict(face="end_b", width_in=round(w / 2, 3), height_in=round(t / 2, 3), depth_in=1.0)
+        if kind == "mortise":
+            return dict(face="top", along_in=round(L / 2, 3), width_in=1.5,
+                        height_in=round(w / 2, 3), depth_in=round(t / 2, 3))
+        if kind == "hole":
+            return dict(face="top", along_in=round(L / 2, 3), diameter_in=0.375, depth_in=0.0)
+        if kind == "slot":
+            return dict(face="top", along_in=round(L / 2, 3), width_in=2.0,
+                        height_in=0.5, depth_in=round(t / 2, 3))
+        if kind == "chamfer":
+            return dict(face="end_b", width_in=round(min(t, w) / 3, 3), depth_in=0.0)
+        return dict(face="top")
+
+    def add_feature(self, kind: str) -> None:
+        if not self.scene.selection:
+            self.logged.emit("sys", "Select a board first.")
+            return
+        part = self.scene.get_part(self.scene.selection)
+        try:
+            feat = self.scene.add_feature(part.id, kind, **self._feature_defaults(kind, part))
+        except (SceneError, ValueError) as exc:
+            self.logged.emit("sys", str(exc).strip('"'))
+            return
+        self.active_feature = feat.id
+        self._commit(f"Added {kind} ({feat.id}) to {part.id}.")
+
+    def select_feature(self, fid: str | None) -> None:
+        self.active_feature = fid
+        self.changed.emit()
+
+    def edit_active_feature(self, **dims) -> None:
+        if not self.active_feature:
+            return
+        try:
+            self.scene.edit_feature(self.active_feature, **dims)
+        except (SceneError, ValueError) as exc:
+            self.logged.emit("sys", str(exc).strip('"'))
+            return
+        self._commit()
+
+    def delete_active_feature(self) -> None:
+        if not self.active_feature:
+            return
+        try:
+            msg = self.scene.delete_feature(self.active_feature)
+        except SceneError:
+            return
+        self.active_feature = None
+        self._commit(msg)
+
+    def active_feature_obj(self):
+        if not self.active_feature:
+            return None
+        try:
+            return self.scene.find_feature(self.active_feature)[1]
+        except SceneError:
+            return None
+
     # ----- project / export --------------------------------------------
     def open_project(self, name): self._do(lambda: cli.cmd_open(self.scene, SimpleNamespace(name=name)))
     def save_project(self, name):

src/woodshop/gui/feature_panel.py

@@ -0,0 +1,106 @@
+"""Joinery panel: add tenon/mortise/hole/slot/chamfer features to the selected
+board, then tweak the active feature's fields. Add-with-default-then-edit:
+clicking a kind drops a sensibly-sized feature you can immediately adjust."""
+from __future__ import annotations
+
+from PySide6.QtCore import Qt
+from PySide6.QtWidgets import (QComboBox, QDoubleSpinBox, QFormLayout, QGridLayout,
+                               QHBoxLayout, QLabel, QListWidget, QListWidgetItem,
+                               QPushButton, QVBoxLayout, QWidget)
+
+from ..scene import FACES
+from .controller import Controller
+
+_KINDS = ["tenon", "mortise", "hole", "slot", "chamfer"]
+
+
+class FeaturePanel(QWidget):
+    def __init__(self, controller: Controller, parent=None):
+        super().__init__(parent)
+        self.c = controller
+        self._loading = False
+
+        root = QVBoxLayout(self)
+        root.addWidget(QLabel("<b>Joinery on the selected board</b>"))
+
+        add = QGridLayout()
+        for i, kind in enumerate(_KINDS):
+            b = QPushButton("+ " + kind.capitalize())
+            b.clicked.connect(lambda _=False, k=kind: self.c.add_feature(k))
+            add.addWidget(b, i // 2, i % 2)
+        root.addLayout(add)
+
+        self.list = QListWidget()
+        self.list.itemSelectionChanged.connect(self._on_row)
+        root.addWidget(self.list, 1)
+
+        form = QFormLayout()
+        self.face = QComboBox(); self.face.addItems(FACES)
+        self.face.currentIndexChanged.connect(self._apply)
+        self._spins = {}
+        for key, label, lo, hi in [
+            ("along_in", "Along", -48, 96), ("across_in", "Across", -24, 24),
+            ("width_in", "Width", 0, 24), ("height_in", "Height", 0, 24),
+            ("depth_in", "Depth", 0, 24), ("diameter_in", "Diameter", 0, 12)]:
+            sp = QDoubleSpinBox(); sp.setRange(lo, hi); sp.setSingleStep(0.25); sp.setSuffix(" in")
+            sp.editingFinished.connect(self._apply)
+            self._spins[key] = sp
+        form.addRow("Face", self.face)
+        for key, sp in self._spins.items():
+            form.addRow(key.replace("_in", "").capitalize(), sp)
+        root.addLayout(form)
+
+        btns = QHBoxLayout()
+        self.del_btn = QPushButton("Delete feature")
+        self.del_btn.clicked.connect(self.c.delete_active_feature)
+        btns.addWidget(self.del_btn)
+        root.addLayout(btns)
+
+        self.c.changed.connect(self.refresh)
+        self.refresh()
+
+    def _part(self):
+        pid = self.c.selected_id
+        return next((p for p in self.c.scene.parts if p.id == pid), None) if pid else None
+
+    def refresh(self) -> None:
+        self._loading = True
+        part = self._part()
+        self.list.clear()
+        feats = part.features if part else []
+        # keep the active feature pointing at something on this board
+        ids = [f.id for f in feats]
+        if self.c.active_feature not in ids:
+            self.c.active_feature = ids[0] if ids else None
+        for f in feats:
+            label = (f"{f.id}: {f.kind} · {f.face}")
+            item = QListWidgetItem(label)
+            item.setData(Qt.UserRole, f.id)
+            self.list.addItem(item)
+            if f.id == self.c.active_feature:
+                item.setSelected(True)
+
+        feat = self.c.active_feature_obj()
+        editable = feat is not None
+        self.face.setEnabled(editable)
+        self.del_btn.setEnabled(editable)
+        for sp in self._spins.values():
+            sp.setEnabled(editable)
+        if feat:
+            self.face.setCurrentText(feat.face)
+            for key, sp in self._spins.items():
+                sp.setValue(getattr(feat, key))
+        self._loading = False
+
+    def _on_row(self) -> None:
+        if self._loading:
+            return
+        items = self.list.selectedItems()
+        if items:
+            self.c.select_feature(items[0].data(Qt.UserRole))
+
+    def _apply(self) -> None:
+        if self._loading or not self.c.active_feature:
+            return
+        dims = {key: sp.value() for key, sp in self._spins.items()}
+        self.c.edit_active_feature(face=self.face.currentText(), **dims)

src/woodshop/gui/main_window.py

@@ -5,12 +5,13 @@ from __future__ import annotations
 from PySide6.QtCore import Qt, QThreadPool
 from PySide6.QtGui import QAction, QKeySequence
 from PySide6.QtWidgets import (QFileDialog, QInputDialog, QMainWindow, QMessageBox,
-                               QSplitter, QVBoxLayout, QWidget)
+                               QSplitter, QTabWidget, QVBoxLayout, QWidget)
 
 from ..cutlist import board_feet
 from ..scene import list_projects
 from .command_bar import CommandBar
 from .controller import Controller
+from .feature_panel import FeaturePanel
 from .numpad import NumpadPanel
 from .panels import PartsPanel
 from .viewport import Viewport
@@ -26,13 +27,18 @@ class MainWindow(QMainWindow):
         self.controller = Controller(scene_path)
         self.viewport = Viewport()
         self.parts = PartsPanel(self.controller)
+        self.features_panel = FeaturePanel(self.controller)
         self.numpad = NumpadPanel(self.controller, self.viewport)
         self.command = CommandBar(self.controller, self.pool)
 
+        tabs = QTabWidget()
+        tabs.addTab(self.parts, "Parts")
+        tabs.addTab(self.features_panel, "Joinery")
+
         right = QWidget()
         rlayout = QVBoxLayout(right)
         rlayout.setContentsMargins(0, 0, 0, 0)
-        rlayout.addWidget(self.parts, 1)
+        rlayout.addWidget(tabs, 1)
         rlayout.addWidget(self.numpad)
 
         top = QSplitter(Qt.Horizontal)

src/woodshop/scene.py

@@ -84,10 +84,12 @@ def list_projects() -> list[str]:
     return sorted(p.stem for p in d.glob("*.json")) if d.exists() else []
 
 
-# Feature kinds and whether they ADD material (tenon) or CUT it (everything else).
+# Feature kinds: ADD fuses material (tenon), CUT subtracts a box/cylinder, EDGE
+# operates on the board's edges (chamfer bevel).
 ADD_KINDS = {"tenon"}
 CUT_KINDS = {"mortise", "slot", "hole", "dado", "rabbet"}
-FEATURE_KINDS = ADD_KINDS | CUT_KINDS
+EDGE_KINDS = {"chamfer"}
+FEATURE_KINDS = ADD_KINDS | CUT_KINDS | EDGE_KINDS
 FACES = ("end_a", "end_b", "top", "bottom", "left", "right")
 
 

tests/test_geometry.py

@@ -31,6 +31,22 @@ def test_tenon_adds_volume():
     assert part_solid(s.get_part("p1")).volume > base
 
 
+def test_chamfer_reduces_volume():
+    s = Scene()
+    s.place("2x4", 12)
+    base = part_solid(s.get_part("p1")).volume
+    s.add_feature("p1", "chamfer", face="end_b", width_in=0.5)
+    assert part_solid(s.get_part("p1")).volume < base
+
+
+def test_oversized_chamfer_falls_back():
+    s = Scene()
+    s.place("2x4", 12)
+    # absurd chamfer size: clamped/caught, board stays valid (no crash)
+    s.add_feature("p1", "chamfer", face="end_b", width_in=99)
+    assert part_solid(s.get_part("p1")).volume > 0
+
+
 def test_featured_part_tessellates():
     s = Scene()
     s.place("2x4", 12)