Update monthly changelog

Author: actions-user

changelogs/2026-04.md

@@ -1,41 +1,35 @@
 # Changelog 2026-04
 
-- Copper pours
-  - Optional `unbroken` flag for contiguous pours [props #628](https://github.com/tscircuit/props/pull/628) · enabled in core [core #2129](https://github.com/tscircuit/core/pull/2129)
-  - Obstacles now tagged `isCopperPour` for smarter keep-outs [autorouter #840](https://github.com/tscircuit/tscircuit-autorouter/pull/840)
-
-- Autorouter
-  - New Escape-Via stage ties signals to pours [autorouter #875](https://github.com/tscircuit/tscircuit-autorouter/pull/875) with free-space scoring [autorouter #880](https://github.com/tscircuit/tscircuit-autorouter/pull/880) & inner-layer support [autorouter #886](https://github.com/tscircuit/tscircuit-autorouter/pull/886)
-  - Via clearance rules & diff-net spacing DRC [autorouter #854](https://github.com/tscircuit/tscircuit-autorouter/pull/854) [autorouter #917](https://github.com/tscircuit/tscircuit-autorouter/pull/917)
-  - High-density Force-Improve solver integrated [autorouter #876](https://github.com/tscircuit/tscircuit-autorouter/pull/876)
-  - Automatic stage-by-stage PNG dumps for debug [autorouter #848](https://github.com/tscircuit/tscircuit-autorouter/pull/848)
-
-- Footprints
-  - Generic body-based courtyards adopted across SOP/TSSOP/QFN/BGA/JST/SOIC/etc. ([footprinter #584](https://github.com/tscircuit/footprinter/pull/584)-[footprinter #594](https://github.com/tscircuit/footprinter/pull/594))
-  - `pinheader` alias + centered `pinrow` geometry [footprinter #596](https://github.com/tscircuit/footprinter/pull/596) [footprinter #598](https://github.com/tscircuit/footprinter/pull/598)
-
-- Data model & DRC
-  - `routingPhaseIndex` for phased local autorouting [props #629](https://github.com/tscircuit/props/pull/629) · implemented [core #2139](https://github.com/tscircuit/core/pull/2139)
-  - `noConnect` flag on chip pins suppresses unconnected warnings [props #632](https://github.com/tscircuit/props/pull/632) [core #2147](https://github.com/tscircuit/core/pull/2147)
-  - New fields: `insertion_direction`, `display_inductance`, and trace-thickness mismatch warnings ([circuit-json #532](https://github.com/tscircuit/circuit-json/pull/532), [circuit-json #538](https://github.com/tscircuit/circuit-json/pull/538), [circuit-json #537](https://github.com/tscircuit/circuit-json/pull/537))
-  - Courtyard overlap check ignores different layers [checks #130](https://github.com/tscircuit/checks/pull/130); new thin-trace DRC error [checks #132](https://github.com/tscircuit/checks/pull/132)
-
-- Schematic/connector updates
-  - USB-C inner symbol & standardized pin labels [core #2118](https://github.com/tscircuit/core/pull/2118) [core #2131](https://github.com/tscircuit/core/pull/2131)
-
-- CLI
-  - Added `tsci check trace-length` rule [cli #2633](https://github.com/tscircuit/cli/pull/2633)
-  - Configurable worker timeout in builds [cli #2667](https://github.com/tscircuit/cli/pull/2667)
-
-- Viewers & UI
-  - PCB Viewer: drill layer always on top [pcb-viewer #735](https://github.com/tscircuit/pcb-viewer/pull/735), inner-layer pour fix [pcb-viewer #737](https://github.com/tscircuit/pcb-viewer/pull/737), error-focused zoom [pcb-viewer #741](https://github.com/tscircuit/pcb-viewer/pull/741)
-  - CAD Component Viewer: drag-and-drop landing page [cad-component-viz #5](https://github.com/tscircuit/cad-component-viz/pull/5) & revamped UI [cad-component-viz #9](https://github.com/tscircuit/cad-component-viz/pull/9)
-  - Canvas graphics → PNG export & click-to-inspect labels [graphics-debug #109](https://github.com/tscircuit/graphics-debug/pull/109) [graphics-debug #110](https://github.com/tscircuit/graphics-debug/pull/110)
-
-- CAD/3D export
-  - STEP exporter gains face-level colors & style reuse [circuit-json-to-step #71](https://github.com/tscircuit/circuit-json-to-step/pull/71)
-  - GLB board textures upgraded to 1024 px [runframe #3049](https://github.com/tscircuit/runframe/pull/3049)
-
-- Conversion tools
-  - EasyEDA: preserve `{NAME}` placeholder [easyeda-converter #374](https://github.com/tscircuit/easyeda-converter/pull/374), support oval/pill plated holes [#377](https://github.com/tscircuit/easyeda-converter/pull/377), diode/LED semantic mapping [#382](https://github.com/tscircuit/easyeda-converter/pull/382) [#383](https://github.com/tscircuit/easyeda-converter/pull/383)
-  - KiCad: inner-layer parsing & pill-hole rotation fixes [kicad-to-circuit-json #54](https://github.com/tscircuit/kicad-to-circuit-json/pull/54) [#58](https://github.com/tscircuit/kicad-to-circuit-json/pull/58) [#60](https://github.com/tscircuit/kicad-to-circuit-json/pull/60)
+- Unbroken copper pours & pour-aware autorouting
+  - Add `unbroken` flag to CopperPour props [props#628](https://github.com/tscircuit/props/pull/628) → implemented in core [core#2129](https://github.com/tscircuit/core/pull/2129) and respected by autorouter obstacles [autorouter#840](https://github.com/tscircuit/tscircuit-autorouter/pull/840).
+
+- Escape-via stage & clearance DRC in autorouter
+  - Connect signals to pours via new escape-via stage [autorouter#875](https://github.com/tscircuit/tscircuit-autorouter/pull/875).
+  - Enforce via-vs-trace clearance [autorouter#854](https://github.com/tscircuit/tscircuit-autorouter/pull/854) & different-net via spacing [autorouter#917](https://github.com/tscircuit/tscircuit-autorouter/pull/917).
+
+- Massive courtyard overhaul in Footprinter
+  - Generic body-based stepped courtyards and geometry fixes for BGA, QFP, SOIC/TSSOP/SON/SOP/VSSOP, DIP, Axial, JST, TO-220, etc. ([footprinter#584](https://github.com/tscircuit/footprinter/pull/584)‒[footprinter#594](https://github.com/tscircuit/footprinter/pull/594)).
+
+- PCB Viewer UX improvements
+  - Correct inner-layer pour rendering [pcb-viewer#737](https://github.com/tscircuit/pcb-viewer/pull/737).
+  - Smooth error-focused zoom with diamond markers [pcb-viewer#741](https://github.com/tscircuit/pcb-viewer/pull/741) & [pcb-viewer#745](https://github.com/tscircuit/pcb-viewer/pull/745).
+
+- Expanded DRC error coverage
+  - New pad-pad, pad-trace & via-trace clearance elements in Circuit JSON [circuit-json#544](https://github.com/tscircuit/circuit-json/pull/544), [circuit-json#550](https://github.com/tscircuit/circuit-json/pull/550).
+  - Corresponding checks added to DRC engine [checks#134](https://github.com/tscircuit/checks/pull/134) & [checks#135](https://github.com/tscircuit/checks/pull/135).
+
+- EasyEDA & KiCad import upgrades
+  - Preserve `{NAME}` placeholders and support oval/pill plated holes in EasyEDA conversion [easyeda#374](https://github.com/tscircuit/easyeda-converter/pull/374) [easyeda#377](https://github.com/tscircuit/easyeda-converter/pull/377).
+  - KiCad importer gains inner-layer, arc & pill-hole support plus v8 compatibility [kicad-json#54](https://github.com/tscircuit/kicad-to-circuit-json/pull/54) [#58](https://github.com/tscircuit/kicad-to-circuit-json/pull/58) [#60](https://github.com/tscircuit/kicad-to-circuit-json/pull/60) [#64](https://github.com/tscircuit/kicad-to-circuit-json/pull/64).
+
+- CLI additions
+  - New `tsci check trace-length` command [cli#2633](https://github.com/tscircuit/cli/pull/2633).
+  - Configurable worker timeout via `tscircuit.config` [cli#2667](https://github.com/tscircuit/cli/pull/2667).
+
+- CAD & rendering enhancements
+  - STEP export with face-level colors and style reuse [step#71](https://github.com/tscircuit/circuit-json-to-step/pull/71).
+  - Translucent inner-layer copper pours in canvas rendering [canvas#228](https://github.com/tscircuit/circuit-to-canvas/pull/228).
+  - Drag-and-drop model loading and full UI redesign in CAD viewer [cad-viz#5](https://github.com/tscircuit/cad-component-viz/pull/5) [cad-viz#9](https://github.com/tscircuit/cad-component-viz/pull/9).
+
+- Mirrored bottom-layer text
+  - Support `pcb_note_text.is_mirrored` in schema [circuit-json#543](https://github.com/tscircuit/circuit-json/pull/543) and auto-mirror in canvas [canvas#232](https://github.com/tscircuit/circuit-to-canvas/pull/232).