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backend/restart_backend.sh

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+#!/usr/bin/env bash
+# Restart the backend: kill the whole uvicorn process tree on port 8000, then start --reload.
+# Log goes to repo root backend_run.log.
+# Usage (Git Bash, from repo root):  bash backend/restart_backend.sh
+set -u
+
+# Always run relative to this script, so it works from any cwd.
+cd "$(dirname "$0")" || exit 1
+
+# 1) Kill every python process running THIS backend. uvicorn --reload on Windows
+#    spawns three processes (top launcher -> reloader -> worker); killing only the
+#    port listener leaves an orphan reloader that can later rebind :8000 and fight
+#    the new instance. Match the command line to catch launcher + reloader, then
+#    taskkill /T tears down each of their descendant trees (the worker included).
+pids=$(wmic process where "name='python.exe' and commandline like '%uvicorn app.main%'" \
+        get ProcessId 2>/dev/null \
+      | tr -d '\r' \
+      | grep -Eo '[0-9]+' \
+      | sort -u)
+
+if [ -n "$pids" ]; then
+  for pid in $pids; do
+    echo "kill old backend PID $pid"
+    # //PID double slash stops Git Bash from turning /PID into a path.
+    taskkill //PID "$pid" //T //F >/dev/null 2>&1
+  done
+  sleep 2
+fi
+
+# 2) Clear SSLKEYLOGFILE: the user env var's value has a leading U+202A control
+#    char that makes asyncpg throw OSError [Errno 22] on connect.
+unset SSLKEYLOGFILE
+
+# 3) Start, redirecting to repo root backend_run.log (--reload for hot reload).
+echo "starting uvicorn, log: ../backend_run.log"
+exec .venv/Scripts/python.exe -m uvicorn app.main:app --reload --port 8000 > ../backend_run.log 2>&1