diff --git a/README.md b/README.md
index e0470f5..44de3b9 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,22 @@ ASAPQuery has two main components: **asap-planner-rs** analyzes your PromQL quer
 └── asap-query-engine/       # Query serving and sketch precomputation engine
 ```
 
+## Supported Queries
+
+ASAPQuery accelerates PromQL queries that match the following patterns. Queries that don't match are transparently forwarded to Prometheus.
+
+**Temporal range functions** (no label selectors):
+- `rate(metric[range])`
+- `increase(metric[range])`
+- `sum_over_time(metric[range])`, `count_over_time(metric[range])`, `avg_over_time(metric[range])`, `min_over_time(metric[range])`, `max_over_time(metric[range])`
+- `quantile_over_time(φ, metric[range])`
+
+**Aggregation operators** (with optional `by (label, ...)` clause, no label selectors):
+- `sum(...)`, `count(...)`, `avg(...)`, `min(...)`, `max(...)`, `quantile(φ, ...)`, `topk(k, ...)`
+
+**Binary arithmetic** — arithmetic combinations of the above patterns:
+- e.g. `rate(errors_total[5m]) / rate(requests_total[5m])`
+
 ## Coming soon
 
 1. Drop-in ASAPQuery artifact that accelerates Clickhouse queries
diff --git a/gwt.sh b/gwt.sh
index 8b6df7b..248f8e7 100755
--- a/gwt.sh
+++ b/gwt.sh
@@ -1,17 +1,39 @@
 #!/bin/bash
-# Add a git worktree for a branch
+# Add a git worktree for an issue number (uses gh to resolve the branch)
 
 if [ -z "$1" ]; then
-  echo "Usage: gwt.sh <branch-name>"
-  echo "Example: gwt.sh 97-add-option-to-record-prometheus-scrape-duration"
+  echo "Usage: gwt.sh <issue-number>"
+  echo "Example: gwt.sh 97"
   exit 1
 fi
 
-branch_name="$1"
-issue_num="${branch_name%%-*}"  # Extract issue number (everything before first hyphen)
+issue_num="$1"
 
-echo "Fetching branch $branch_name from origin..."
+branches=$(gh issue develop "$issue_num" --list 2>/dev/null | awk '{print $1}')
+
+if [ -z "$branches" ]; then
+  echo "No branch found for issue #$issue_num. Creating one via gh..."
+  gh issue develop "$issue_num"
+  branches=$(gh issue develop "$issue_num" --list 2>/dev/null | awk '{print $1}')
+  if [ -z "$branches" ]; then
+    echo "Failed to create branch for issue #$issue_num."
+    exit 1
+  fi
+fi
+
+branch_count=$(echo "$branches" | wc -l)
+
+if [ "$branch_count" -gt 1 ]; then
+  echo "Multiple branches found for issue #$issue_num:"
+  echo "$branches"
+  exit 1
+fi
+
+branch_name="$branches"
+
+echo "Found branch: $branch_name"
+echo "Fetching from origin..."
 git fetch origin "$branch_name"
 
-echo "Creating worktree at ../worktrees/$issue_num for branch $branch_name..."
+echo "Creating worktree at ../worktrees/$issue_num..."
 git worktree add --track -b "$branch_name" "../worktrees/$issue_num" "origin/$branch_name"