fix: remove external jq dependency from fleet.sh (#125)

Replace external jq calls with gh --jq flag and bash arrays.
fleet.sh runs on the host where jq may not be installed (especially Windows).
gh bundles its own jq implementation, so this eliminates the dependency
while keeping the same issue-fetching and deduplication logic.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: LeeCampbell

.devcontainer/fleet.sh

@@ -9,30 +9,44 @@ source "$SCRIPT_DIR/.env"
 # Build the image
 docker build -t hdrhistogram-agent -f "$SCRIPT_DIR/Dockerfile" "$SCRIPT_DIR/"
 
-# Fetch available issues (assigned to agent first, then labelled 'agent')
-ISSUES=$(GH_TOKEN="$GH_TOKEN_UPSTREAM" gh issue list --assignee "$GIT_USER_NAME" --state open \
+# Fetch assigned issues as tab-separated "number\ttitle" lines
+ASSIGNED=$(GH_TOKEN="$GH_TOKEN_UPSTREAM" gh issue list --assignee "$GIT_USER_NAME" --state open \
     --repo "$UPSTREAM_REPO" --json number,title --limit "$FLEET_SIZE" \
-    --search "sort:created-asc" 2>/dev/null || echo "[]")
+    --search "sort:created-asc" \
+    --jq '.[] | [.number, .title] | @tsv' 2>/dev/null || true)
 
-ISSUE_COUNT=$(echo "$ISSUES" | jq 'length')
+declare -a ISSUE_NUMS=()
+declare -a ISSUE_TITLES=()
+ASSIGNED_NUMS=""
+
+while IFS=$'\t' read -r num title; do
+    [ -z "$num" ] && continue
+    ISSUE_NUMS+=("$num")
+    ISSUE_TITLES+=("$title")
+    ASSIGNED_NUMS+=" $num "
+done <<< "$ASSIGNED"
+
+ISSUE_COUNT=${#ISSUE_NUMS[@]}
 
 if [ "$ISSUE_COUNT" -lt "$FLEET_SIZE" ]; then
     REMAINING=$((FLEET_SIZE - ISSUE_COUNT))
-    ASSIGNED_NUMS=$(echo "$ISSUES" | jq -r '.[].number')
-
     EXTRA=$(GH_TOKEN="$GH_TOKEN_UPSTREAM" gh issue list --label agent --state open \
         --repo "$UPSTREAM_REPO" --json number,title --limit "$REMAINING" \
-        --search "sort:created-asc" 2>/dev/null || echo "[]")
-
-    # Filter out any already-assigned issues
-    for num in $ASSIGNED_NUMS; do
-        EXTRA=$(echo "$EXTRA" | jq --argjson n "$num" '[.[] | select(.number != $n)]')
-    done
+        --search "sort:created-asc" \
+        --jq '.[] | [.number, .title] | @tsv' 2>/dev/null || true)
 
-    ISSUES=$(echo "$ISSUES $EXTRA" | jq -s 'add // []')
+    while IFS=$'\t' read -r num title; do
+        [ -z "$num" ] && continue
+        # Skip already-assigned issues
+        if [[ "$ASSIGNED_NUMS" == *" $num "* ]]; then
+            continue
+        fi
+        ISSUE_NUMS+=("$num")
+        ISSUE_TITLES+=("$title")
+    done <<< "$EXTRA"
 fi
 
-ISSUE_COUNT=$(echo "$ISSUES" | jq 'length')
+ISSUE_COUNT=${#ISSUE_NUMS[@]}
 if [ "$ISSUE_COUNT" -eq 0 ]; then
     echo "No issues available."
     exit 0
@@ -41,8 +55,8 @@ fi
 echo "Found $ISSUE_COUNT issue(s). Launching agents..."
 
 for i in $(seq 0 $((ISSUE_COUNT - 1))); do
-    ISSUE_NUM=$(echo "$ISSUES" | jq -r ".[$i].number")
-    ISSUE_TITLE=$(echo "$ISSUES" | jq -r ".[$i].title")
+    ISSUE_NUM="${ISSUE_NUMS[$i]}"
+    ISSUE_TITLE="${ISSUE_TITLES[$i]}"
     AGENT_NAME="hdrhistogram-agent-${ISSUE_NUM}"
 
     echo "Starting $AGENT_NAME for issue #${ISSUE_NUM}: ${ISSUE_TITLE}"