Ignore local build artifacts

.gitignore

@@ -1,2 +1,25 @@
 # Local Codex state
 .codex
+
+# OS / filesystem junk
+.DS_Store
+Thumbs.db
+desktop.ini
+
+# Editor / IDE state
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Vivado scratch dropped in the current working directory whenever Vivado is
+# invoked from anywhere other than FPGA/vivado/ (e.g. running create_project.tcl
+# from the repo root).
+.Xil/
+vivado*.jou
+vivado*.log
+vivado*.backup.*
+webtalk*.jou
+webtalk*.log
+usage_statistics_webtalk.*

Software/.gitignore

@@ -0,0 +1,21 @@
+# Bare-metal RISC-V build artifacts (riscv64-unknown-elf-gcc / ld / objcopy).
+# Source (.c, .S, .h, *.ld linker scripts, Makefiles) stays tracked.
+
+# Object / archive / dependency files
+*.o
+*.a
+*.d
+
+# Linked outputs
+*.elf
+*.bin
+*.hex
+*.map
+*.lst
+*.dis
+*.dump
+
+# Common build directories
+build/
+obj/
+out/