Merge origin/main into fix/issue-116-modularize-script

Split the monolithic kugetsu script into modular components:

Modules created:
- kugetsu-config.sh - Config/env loading and global variables
- kugetsu-index.sh - Index.json read/write via JSON
- kugetsu-worktree.sh - Git worktree operations
- kugetsu-log.sh - Structured logging and notifications
- kugetsu-session.sh - Session create/fork/destroy logic
- kugetsu-queue-daemon.sh - Queue daemon subprocess

Main script (kugetsu) is now a thin dispatcher that sources all modules.

Acceptance Criteria:
- All existing commands work exactly as before
- Main script sources modules
- Each module is independently testable

Fixes #116

skills/kugetsu/scripts/kugetsu-config.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+set -euo pipefail
+
+KUGETSU_DIR="${KUGETSU_DIR:-$HOME/.kugetsu}"
+SESSIONS_DIR="$KUGETSU_DIR/sessions"
+WORKTREES_DIR="$KUGETSU_DIR/worktrees"
+REPOS_CONFIG="$KUGETSU_DIR/repos.json"
+INDEX_FILE="$KUGETSU_DIR/index.json"
+NOTIFICATIONS_FILE="$KUGETSU_DIR/notifications.json"
+LOGS_DIR="$KUGETSU_DIR/logs"
+ENV_DIR="${ENV_DIR:-$KUGETSU_DIR/env}"
+VERBOSITY_DIR="$KUGETSU_DIR/verbosity"
+
+MAX_CONCURRENT_AGENTS="${MAX_CONCURRENT_AGENTS:-3}"
+KUGETSU_VERBOSITY="${KUGETSU_VERBOSITY:-default}"
+CONTEXT_DIR="${CONTEXT_DIR:-$KUGETSU_DIR/context}"
+ENABLE_CONTEXT_DUMP="${ENABLE_CONTEXT_DUMP:-true}"
+WORKTREE_CHECK_PR_STATUS="${WORKTREE_CHECK_PR_STATUS:-true}"
+
+QUEUE_DIR="${QUEUE_DIR:-$KUGETSU_DIR/queue}"
+QUEUE_ITEMS_DIR="${QUEUE_ITEMS_DIR:-$QUEUE_DIR/items}"
+QUEUE_DAEMON_PID_FILE="${QUEUE_DAEMON_PID_FILE:-$QUEUE_DIR/daemon.pid}"
+QUEUE_DAEMON_LOCK_FILE="${QUEUE_DAEMON_LOCK_FILE:-$QUEUE_DIR/daemon.lock}"
+QUEUE_DAEMON_LOG_FILE="${QUEUE_DAEMON_LOG_FILE:-$QUEUE_DIR/daemon.log}"
+QUEUE_DAEMON_INTERVAL_MINUTES="${QUEUE_DAEMON_INTERVAL_MINUTES:-5}"
+QUEUE_CLEANUP_AGE_DAYS="${QUEUE_CLEANUP_AGE_DAYS:-7}"
+TASK_TIMEOUT_HOURS="${TASK_TIMEOUT_HOURS:-1}"
+
+# Load user config overrides (~/.kugetsu/config)
+if [ -f "$KUGETSU_DIR/config" ]; then
+    source "$KUGETSU_DIR/config"
+fi
+
+mask_sensitive_vars() {
+    local line="$1"
+    for var in GITEA_TOKEN GITHUB_TOKEN GITLAB_TOKEN API_KEY PASSWORD TOKEN SECRET; do
+        if [[ "$line" =~ $var ]]; then
+            line=$(echo "$line" | sed -E "s/=.*/=***MASKED***/")
+        fi
+    done
+    echo "$line"
+}
+
+load_agent_env() {
+    local agent_type="${1:-base}"
+    local env_file="$ENV_DIR/${agent_type}.env"
+    
+    if [ -f "$env_file" ]; then
+        set -a
+        source "$env_file"
+        set +a
+    elif [ -f "$ENV_DIR/default.env" ]; then
+        set -a
+        source "$ENV_DIR/default.env"
+        set +a
+    fi
+}

skills/kugetsu/scripts/kugetsu-index.sh

@@ -0,0 +1,135 @@
+#!/bin/bash
+set -euo pipefail
+
+read_index() {
+    if [ -f "$INDEX_FILE" ]; then
+        cat "$INDEX_FILE"
+    else
+        echo '{"base": null, "pm_agent": null, "issues": {}}'
+    fi
+}
+
+write_index() {
+    local base="$1"
+    local pm_agent="$2"
+    local issues_json="$3"
+    local temp_file="$INDEX_FILE.tmp.$$"
+    printf '{"base": %s, "pm_agent": %s, "issues": %s}\n' "$base" "$pm_agent" "$issues_json" > "$temp_file"
+    mv "$temp_file" "$INDEX_FILE"
+}
+
+get_base_session_id() {
+    local index=$(read_index)
+    echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('base') or '')"
+}
+
+get_pm_agent_session_id() {
+    local index=$(read_index)
+    echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('pm_agent') or '')"
+}
+
+get_session_for_issue() {
+    local issue_ref="$1"
+    local index=$(read_index)
+    echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('issues', {}).get('$issue_ref') or 'null')"
+}
+
+set_base_in_index() {
+    local session_id="$1"
+    local index=$(read_index)
+    local pm_agent=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('pm_agent') or 'null')")
+    local issues=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(json.dumps(d.get('issues', {})))")
+    
+    if [ "$session_id" = "null" ]; then
+        write_index "null" "$pm_agent" "$issues"
+    else
+        write_index "\"$session_id\"" "$pm_agent" "$issues"
+    fi
+}
+
+set_pm_agent_in_index() {
+    local session_id="$1"
+    local index=$(read_index)
+    local base=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('base') or 'null')")
+    local issues=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(json.dumps(d.get('issues', {})))")
+    
+    if [ "$session_id" = "null" ]; then
+        write_index "$base" "null" "$issues"
+    else
+        write_index "$base" "\"$session_id\"" "$issues"
+    fi
+}
+
+add_issue_to_index() {
+    local issue_ref="$1"
+    local session_file="$2"
+    
+    local index=$(read_index)
+    local base=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('base') or 'null')")
+    local pm_agent=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('pm_agent') or 'null')")
+    
+    local issues=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(json.dumps(d.get('issues', {})))")
+    
+    issues=$(python3 -c "import sys, json; d=json.load(sys.stdin); d['$issue_ref']='$session_file'; print(json.dumps(d))" <<< "$issues")
+    
+    write_index "$base" "$pm_agent" "$issues"
+}
+
+remove_issue_from_index() {
+    local issue_ref="$1"
+    
+    local index=$(read_index)
+    local base=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('base') or 'null')")
+    local pm_agent=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(d.get('pm_agent') or 'null')")
+    
+    local issues=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); print(json.dumps(d.get('issues', {})))")
+    
+    issues=$(python3 -c "import sys, json; d=json.load(sys.stdin); d.pop('$issue_ref', None); print(json.dumps(d))" <<< "$issues")
+    
+    write_index "$base" "$pm_agent" "$issues"
+}
+
+validate_issue_ref() {
+    local issue_ref="$1"
+    
+    if [[ ! "$issue_ref" =~ ^[a-zA-Z0-9.-]+/[a-zA-Z0-9._-]+/[a-zA-Z0-9._-]+#[0-9]+$ ]]; then
+        echo "Error: Invalid issue ref format: '$issue_ref'" >&2
+        echo "Expected format: instance/user/repo#number" >&2
+        echo "Example: github.com/shoko/kugetsu#14" >&2
+        exit 1
+    fi
+}
+
+update_session_pr_url() {
+    local issue_ref="$1"
+    local pr_url="$2"
+    
+    local session_file=$(get_session_for_issue "$issue_ref")
+    if [ -z "$session_file" ] || [ "$session_file" = "null" ]; then
+        echo "Error: No session found for '$issue_ref'" >&2
+        return 1
+    fi
+    
+    local session_path="$SESSIONS_DIR/$session_file"
+    if [ ! -f "$session_path" ]; then
+        echo "Error: Session file not found: $session_path" >&2
+        return 1
+    fi
+    
+    python3 << PYEOF
+import json
+
+session_path = "$session_path"
+pr_url = "$pr_url"
+
+with open(session_path, 'r') as f:
+    session = json.load(f)
+
+session['pr_url'] = pr_url
+
+with open(session_path, 'w') as f:
+    json.dump(session, f, indent=2)
+
+print(f"Updated PR URL for $issue_ref: $pr_url")
+PYEOF
+}

skills/kugetsu/scripts/kugetsu-log.sh

@@ -0,0 +1,91 @@
+#!/bin/bash
+set -euo pipefail
+
+cmd_logs() {
+    local count="${1:-10}"
+    
+    if [ ! -d "$LOGS_DIR" ]; then
+        echo "No logs found."
+        return
+    fi
+    
+    find "$LOGS_DIR" -type f -mtime +7 -delete 2>/dev/null
+    
+    ls -lt "$LOGS_DIR" | head -$((count + 1)) | tail -$count | while read line; do
+        echo "$line"
+    done
+    
+    echo ""
+    echo "Recent log contents:"
+    echo "===================="
+    
+    for log in $(ls -lt "$LOGS_DIR" | head -$((count + 1)) | tail -$count | awk '{print $NF}'); do
+        if [ -f "$LOGS_DIR/$log" ]; then
+            echo ""
+            echo "--- $log ---"
+            tail -20 "$LOGS_DIR/$log" | while read line; do
+                echo "  $(mask_sensitive_vars "$line")"
+            done
+        fi
+    done
+}
+
+kugetsu_add_notification() {
+    local notification_type="$1"
+    local message="$2"
+    local issue_ref="${3:-}"
+    local timestamp=$(date -Iseconds)
+    
+    mkdir -p "$(dirname "$NOTIFICATIONS_FILE")"
+    
+    local notifications="[]"
+    if [ -f "$NOTIFICATIONS_FILE" ]; then
+        notifications=$(cat "$NOTIFICATIONS_FILE")
+    fi
+    
+    local new_notification=$(python3 -c "import json; print(json.dumps({
+        'type': '$notification_type',
+        'message': '$message',
+        'issue_ref': '$issue_ref',
+        'timestamp': '$timestamp',
+        'read': False
+    }))")
+    
+    notifications=$(python3 -c "import json; n=json.loads('$notifications'); n.append(json.loads('$new_notification')); print(json.dumps(n[-50:] if len(n)>50 else n, indent=2))")
+    
+    echo "$notifications" > "$NOTIFICATIONS_FILE"
+}
+
+cmd_notify() {
+    local action="${1:-list}"
+    
+    case "$action" in
+        list)
+            if [ ! -f "$NOTIFICATIONS_FILE" ]; then
+                echo "No notifications."
+                return
+            fi
+            
+            local notifications=$(cat "$NOTIFICATIONS_FILE")
+            local count=$(echo "$notifications" | python3 -c "import sys, json; n=json.load(sys.stdin); print(sum(1 for x in n if not x.get('read', False)))")
+            
+            if [ "$count" -eq 0 ]; then
+                echo "No unread notifications."
+                return
+            fi
+            
+            echo "Unread notifications ($count):"
+            echo "$notifications" | python3 -c "import sys, json; [print(f\"  [{x.get('timestamp', '')}] {x.get('type', '')}: {x.get('message', '')}\") for x in json.load(sys.stdin) if not x.get('read', False)]"
+            ;;
+        clear)
+            if [ -f "$NOTIFICATIONS_FILE" ]; then
+                python3 -c "import json; print(json.dumps([x for x in json.load(open('$NOTIFICATIONS_FILE')) if x.get('read', False)], indent=2))" > "$NOTIFICATIONS_FILE"
+                echo "Cleared unread notifications."
+            fi
+            ;;
+        *)
+            echo "Usage: kugetsu notify [list|clear]" >&2
+            exit 1
+            ;;
+    esac
+}

skills/kugetsu/scripts/kugetsu-queue-daemon.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+source "$SCRIPT_DIR/kugetsu-config.sh"
+source "$SCRIPT_DIR/kugetsu-index.sh"
+source "$SCRIPT_DIR/kugetsu-worktree.sh"
+source "$SCRIPT_DIR/kugetsu-log.sh"
+
+while true; do
+    if [ -d "$QUEUE_ITEMS_DIR" ]; then
+        for item in "$QUEUE_ITEMS_DIR"/*.json; do
+            [ -f "$item" ] || continue
+            state=$(python3 -c "import json; print(json.load(open('$item')).get('state', ''))" 2>/dev/null)
+            if [ "$state" = "pending" ]; then
+                queue_id=$(basename "$item" .json)
+                issue_ref=$(python3 -c "import json; print(json.load(open('$item')).get('issue_ref', ''))" 2>/dev/null)
+                message=$(python3 -c "import json; print(json.load(open('$item')).get('message', ''))" 2>/dev/null)
+                
+                pm_session=$(get_pm_agent_session_id)
+                if [ -n "$pm_session" ] && [ "$pm_session" != "null" ]; then
+                    log_file="$LOGS_DIR/delegate-$(date +%s).log"
+                    GITEA_TOKEN="${GITEA_TOKEN:-}" nohup sh -c "opencode run '$message' --continue --session '$pm_session' >> '$log_file' 2>&1" > /dev/null 2>&1 &
+                    pid=$!
+                    update_queue_item_state "$queue_id" "notified" "$pm_session" "$pid"
+                fi
+            fi
+        done
+    fi
+    sleep "${QUEUE_DAEMON_INTERVAL_MINUTES:-5}m"
+done

skills/kugetsu/scripts/kugetsu-session.sh

@@ -0,0 +1,569 @@
+#!/bin/bash
+set -euo pipefail
+
+count_active_dev_sessions() {
+    local count=0
+    if [ -d "$SESSIONS_DIR" ]; then
+        for session_file in "$SESSIONS_DIR"/*.json; do
+            if [ -f "$session_file" ]; then
+                local filename=$(basename "$session_file")
+                if [ "$filename" != "base.json" ] && [ "$filename" != "pm-agent.json" ]; then
+                    count=$((count + 1))
+                fi
+            fi
+        done
+    fi
+    echo "$count"
+}
+
+cmd_init() {
+    local force=false
+
+    while [ $# -gt 0 ]; do
+        case "$1" in
+            --force)
+                force=true
+                ;;
+            *)
+                ;;
+        esac
+        shift
+    done
+
+    ensure_dirs
+
+    if [ ! -f "$KUGETSU_DIR/config" ]; then
+        cat > "$KUGETSU_DIR/config" << 'EOF'
+# User configuration overrides
+# Values set here take precedence over defaults
+# Changes take effect immediately (no re-init needed)
+
+# Max concurrent dev agents (default: 3)
+# MAX_CONCURRENT_AGENTS=5
+
+# Git server configurations
+# Format: GIT_SERVERS["hostname"]="https://hostname"
+declare -A GIT_SERVERS
+GIT_SERVERS["github.com"]="https://github.com"
+GIT_SERVERS["git.fbrns.co"]="https://git.fbrns.co"
+DEFAULT_GIT_SERVER="github.com"
+EOF
+        echo "Created config file: $KUGETSU_DIR/config"
+    fi
+
+    local existing_base=$(get_base_session_id)
+    local existing_pm=$(get_pm_agent_session_id)
+    
+    if [ -n "$existing_base" ] && [ "$existing_base" != "null" ]; then
+        if [ "$force" = true ]; then
+            echo "Warning: Reinitializing sessions (force mode)" >&2
+        else
+            echo "Error: Base session already exists: $existing_base" >&2
+            echo "Use --force to reinitialize" >&2
+            exit 1
+        fi
+    fi
+
+    if ! test -t 0; then
+        echo "Error: init requires a terminal (TTY)" >&2
+        echo "Please run this command in an interactive shell" >&2
+        exit 1
+    fi
+
+    echo "Starting TUI to create base session..."
+    echo "Press Ctrl+C to cancel or wait for session to be created"
+    sleep 2
+
+    opencode
+
+    local session_ids=$(opencode session list 2>/dev/null | grep -E '^ses_' | awk '{print $1}' | tail -1)
+    if [ -z "$session_ids" ]; then
+        echo "Error: Could not find newly created session" >&2
+        exit 1
+    fi
+
+    echo "$session_ids" > "$SESSIONS_DIR/base.json"
+    set_base_in_index "$session_ids"
+
+    echo "Base session created: $session_ids"
+    echo "Starting PM agent..."
+
+    opencode
+
+    local pm_session_ids=$(opencode session list 2>/dev/null | grep -E '^ses_' | grep -v "$session_ids" | tail -1)
+    if [ -z "$pm_session_ids" ]; then
+        echo "Warning: Could not find separate PM agent session" >&2
+        pm_session_ids="$session_ids"
+    fi
+
+    echo "$pm_session_ids" > "$SESSIONS_DIR/pm-agent.json"
+    set_pm_agent_in_index "$pm_session_ids"
+
+    load_agent_env "pm-agent"
+
+    local pm_system_prompt=""
+    if [ -f "$KUGETSU_DIR/pm-agent.md" ]; then
+        pm_system_prompt=$(cat "$KUGETSU_DIR/pm-agent.md")
+        echo "Injecting PM agent system prompt from $KUGETSU_DIR/pm-agent.md"
+    fi
+
+    echo "PM agent session created: $pm_session_ids"
+    echo ""
+    echo "kugetsu initialized successfully!"
+    echo "  Base session: $session_ids"
+    echo "  PM agent: $pm_session_ids"
+}
+
+extract_issue_ref_from_message() {
+    local message="$1"
+    
+    if [ -z "$message" ]; then
+        echo ""
+        return
+    fi
+    
+    if [[ "$message" =~ ^([a-zA-Z0-9.-]+/[a-zA-Z0-9._-]+/[a-zA-Z0-9._-]+#[0-9]+) ]]; then
+        echo "${BASH_REMATCH[1]}"
+        return
+    fi
+    
+    if [[ "$message" =~ (https?://[a-zA-Z0-9.-]+/[a-zA-Z0-9._-]+/[a-zA-Z0-9._-]+/(issues|pull)/[0-9]+) ]]; then
+        local url="${BASH_REMATCH[1]}"
+        local path=$(echo "$url" | sed 's|https\?://||' | cut -d'/' -f2-)
+        local instance=$(echo "$path" | cut -d'/' -f1)
+        local owner=$(echo "$path" | cut -d'/' -f2)
+        local repo=$(echo "$path" | cut -d'/' -f3)
+        local num=$(echo "$path" | grep -oE '[0-9]+$')
+        echo "${instance}/${owner}/${repo}#${num}"
+        return
+    fi
+    
+    echo ""
+}
+
+cmd_delegate() {
+    local message="${1:-}"
+    
+    if [ -z "$message" ]; then
+        echo "Error: message is required" >&2
+        echo "Usage: kugetsu delegate <message>" >&2
+        exit 1
+    fi
+    
+    local issue_ref=$(extract_issue_ref_from_message "$message")
+    
+    if [ -n "$issue_ref" ] && [[ "$issue_ref" =~ \#[0-9]+$ ]]; then
+        cmd_start "$issue_ref" "$message"
+        return
+    fi
+    
+    local pm_session=$(get_pm_agent_session_id)
+    if [ -z "$pm_session" ] || [ "$pm_session" = "null" ] || [ "$pm_session" = "None" ]; then
+        echo "Error: PM agent session not found. Run 'kugetsu init' first." >&2
+        exit 1
+    fi
+    
+    mkdir -p "$LOGS_DIR"
+    local log_file="$LOGS_DIR/delegate-$(date +%s).log"
+    nohup sh -c "GITEA_TOKEN='${GITEA_TOKEN:-}' opencode run '$message' --continue --session '$pm_session' >> '$log_file' 2>&1" > /dev/null 2>&1 &
+    disown
+    echo "Delegated to PM agent (logged to $(basename "$log_file"))"
+}
+
+cmd_start() {
+    local issue_ref="${1:-}"
+    local message="${2:-}"
+    
+    if [ -z "$issue_ref" ]; then
+        echo "Error: issue ref is required" >&2
+        echo "Usage: kugetsu start <issue-ref> [message]" >&2
+        exit 1
+    fi
+    
+    validate_issue_ref "$issue_ref"
+    
+    local base_session_id=$(get_base_session_id)
+    if [ -z "$base_session_id" ] || [ "$base_session_id" = "null" ]; then
+        echo "Error: Base session not found. Run 'kugetsu init' first." >&2
+        exit 1
+    fi
+    
+    local pm_agent_session_id=$(get_pm_agent_session_id)
+    if [ -z "$pm_agent_session_id" ] || [ "$pm_agent_session_id" = "null" ]; then
+        echo "Error: PM agent session not found. Run 'kugetsu init' first." >&2
+        exit 1
+    fi
+    
+    if worktree_exists "$issue_ref"; then
+        echo "Issue '$issue_ref' already has a worktree. Use 'kugetsu continue' instead."
+        exit 1
+    fi
+    
+    local active_count=$(count_active_dev_sessions)
+    if [ "$active_count" -ge "${MAX_CONCURRENT_AGENTS:-3}" ]; then
+        echo "Error: Max concurrent agents (${MAX_CONCURRENT_AGENTS:-3}) reached. Use 'kugetsu continue' or wait for an agent to finish." >&2
+        exit 1
+    fi
+    
+    local session_file=$(issue_ref_to_filename "$issue_ref")
+    local session_path="$SESSIONS_DIR/$session_file"
+    
+    if [ -f "$session_path" ]; then
+        echo "Session file already exists: $session_file"
+        echo "Use 'kugetsu continue $issue_ref' to continue work."
+        exit 1
+    fi
+    
+    local before_sessions=$(opencode session list 2>/dev/null | grep -oP '^ses_\w+' | sort)
+    local before_set="|$before_sessions|"
+    
+    create_worktree "$issue_ref"
+    
+    local after_sessions=$(opencode session list 2>/dev/null | grep -oP '^ses_\w+' | sort)
+    local new_session_id=""
+    while IFS= read -r sess; do
+        if [[ ! "$before_set" =~ \|${sess}\| ]] && [[ "$sess" != "$base_session_id" ]] && [[ "$sess" != "$pm_agent_session_id" ]]; then
+            new_session_id="$sess"
+            break
+        fi
+    done <<< "$after_sessions"
+    
+    if [ -z "$new_session_id" ]; then
+        echo "Error: Could not find newly created session" >&2
+        remove_worktree_for_issue "$issue_ref"
+        exit 1
+    fi
+    
+    local worktree_path=$(issue_ref_to_worktree_path "$issue_ref")
+    
+    printf '{"type": "forked", "issue_ref": "%s", "opencode_session_id": "%s", "worktree_path": "%s", "created_at": "%s", "state": "idle"}\n' \
+        "$issue_ref" "$new_session_id" "$worktree_path" "$(date -Iseconds)" > "$SESSIONS_DIR/$session_file"
+    
+    add_issue_to_index "$issue_ref" "$session_file"
+    
+    echo "Session started for '$issue_ref': $new_session_id"
+    echo "Worktree: $worktree_path"
+}
+
+cmd_continue() {
+    local session_name=""
+    local message=""
+    local args=("$@")
+
+    args=$(set_debug_mode "${args[@]}")
+
+    for arg in $args; do
+        if [ -z "$session_name" ]; then
+            session_name="$arg"
+        else
+            message="$arg"
+        fi
+    done
+    
+    if [ -z "$session_name" ]; then
+        echo "Error: issue ref is required" >&2
+        echo "Usage: kugetsu continue <issue-ref> [message]" >&2
+        exit 1
+    fi
+    
+    validate_issue_ref "$session_name"
+    
+    local session_file=$(get_session_for_issue "$session_name")
+    if [ -z "$session_file" ] || [ "$session_file" = "null" ]; then
+        echo "Error: No session found for '$session_name'" >&2
+        echo "Use 'kugetsu start $session_name' to create a new session." >&2
+        exit 1
+    fi
+    
+    local session_path="$SESSIONS_DIR/$session_file"
+    
+    if [ ! -f "$session_path" ]; then
+        echo "Error: Session file not found: $session_path" >&2
+        exit 1
+    fi
+    
+    load_agent_env "dev"
+    
+    local opencode_session_id=$(python3 -c "import json; print(json.load(open('$session_path')).get('opencode_session_id', ''))" 2>/dev/null || echo "")
+    local worktree_path=$(python3 -c "import json; print(json.load(open('$session_path')).get('worktree_path', ''))" 2>/dev/null || echo "")
+    
+    if [ -n "$worktree_path" ] && [ -d "$worktree_path" ]; then
+        if [ -n "$message" ]; then
+            (cd "$worktree_path" && opencode run "$message" --continue --session "$opencode_session_id" "$@")
+        else
+            (cd "$worktree_path" && opencode --continue --session "$opencode_session_id" "$@")
+        fi
+    else
+        if [ -n "$message" ]; then
+            opencode run "$message" --continue --session "$opencode_session_id" "$@"
+        else
+            opencode --continue --session "$opencode_session_id" "$@"
+        fi
+    fi
+}
+
+cmd_list() {
+    echo "=== kugetsu sessions ==="
+    echo ""
+    
+    local base_id=$(get_base_session_id)
+    if [ -n "$base_id" ] && [ "$base_id" != "null" ]; then
+        echo "Base session: $base_id"
+    else
+        echo "Base session: not initialized"
+    fi
+    
+    local pm_id=$(get_pm_agent_session_id)
+    if [ -n "$pm_id" ] && [ "$pm_id" != "null" ]; then
+        echo "PM agent: $pm_id"
+    else
+        echo "PM agent: not initialized"
+    fi
+    
+    echo ""
+    echo "Issue sessions:"
+    
+    if [ -d "$SESSIONS_DIR" ]; then
+        for session_file in "$SESSIONS_DIR"/*.json; do
+            if [ -f "$session_file" ]; then
+                local filename=$(basename "$session_file")
+                if [ "$filename" != "base.json" ] && [ "$filename" != "pm-agent.json" ]; then
+                    local issue_ref=$(filename_to_issue_ref "$filename")
+                    local opencode_sid=$(python3 -c "import json; print(json.load(open('$session_file')).get('opencode_session_id', 'unknown'))" 2>/dev/null || echo "unknown")
+                    local state=$(python3 -c "import json; print(json.load(open('$session_file')).get('state', 'unknown'))" 2>/dev/null || echo "unknown")
+                    local worktree_path=$(python3 -c "import json; print(json.load(open('$session_file')).get('worktree_path', ''))" 2>/dev/null || echo "")
+                    local worktree_status=""
+                    if [ -n "$worktree_path" ]; then
+                        if [ -d "$worktree_path" ]; then
+                            worktree_status="(worktree exists)"
+                        else
+                            worktree_status="(worktree MISSING)"
+                        fi
+                    fi
+                    echo "  $filename"
+                    echo "    Issue: $issue_ref"
+                    echo "    Session: $opencode_sid"
+                    echo "    State: $state"
+                    echo "    $worktree_status"
+                fi
+            fi
+        done
+    fi
+    
+    if [ -d "$WORKTREES_DIR" ]; then
+        echo ""
+        echo "Worktrees without sessions:"
+        for worktree in $(find "$WORKTREES_DIR" -mindepth 1 -maxdepth 1 -type d 2>/dev/null); do
+            local worktree_name=$(basename "$worktree")
+            local has_session=false
+            for session_file in "$SESSIONS_DIR"/*.json; do
+                if [ -f "$session_file" ]; then
+                    local wt_path=$(python3 -c "import json; print(json.load(open('$session_file')).get('worktree_path', ''))" 2>/dev/null || echo "")
+                    if [ "$wt_path" = "$worktree" ]; then
+                        has_session=true
+                        break
+                    fi
+                fi
+            done
+            if [ "$has_session" = false ]; then
+                echo "  $worktree_name (no session)"
+            fi
+        done
+    fi
+}
+
+cmd_prune() {
+    local force=false
+    
+    if [ "$1" = "--force" ]; then
+        force=true
+    fi
+    
+    echo "=== kugetsu prune ==="
+    echo ""
+    
+    local orphaned=()
+    
+    if [ -d "$SESSIONS_DIR" ]; then
+        for session_file in "$SESSIONS_DIR"/*.json; do
+            [ -f "$session_file" ] || continue
+            local filename=$(basename "$session_file")
+            if [ "$filename" = "base.json" ] || [ "$filename" = "pm-agent.json" ]; then
+                continue
+            fi
+            
+            local opencode_sid=$(python3 -c "import json; print(json.load(open('$session_file')).get('opencode_session_id', ''))" 2>/dev/null || echo "")
+            
+            if [ -n "$opencode_sid" ]; then
+                local exists=$(opencode session list 2>/dev/null | grep -c "^$opencode_sid" || echo "0")
+                if [ "$exists" -eq 0 ]; then
+                    orphaned+=("$session_file")
+                fi
+            else
+                orphaned+=("$session_file")
+            fi
+        done
+    fi
+    
+    if [ ${#orphaned[@]} -eq 0 ]; then
+        echo "No orphaned sessions found."
+        return
+    fi
+    
+    echo "Found ${#orphaned[@]} orphaned session(s):"
+    for session in "${orphaned[@]}"; do
+        echo "  $session"
+    done
+    echo ""
+    
+    if [ "$force" = false ]; then
+        read -p "Remove these sessions? [y/N] " -r answer
+        if [[ ! "$answer" =~ ^[Yy]$ ]]; then
+            echo "Aborted."
+            return
+        fi
+    fi
+    
+    for session in "${orphaned[@]}"; do
+        local issue_ref=$(python3 -c "import json; print(json.load(open('$session')).get('issue_ref', ''))" 2>/dev/null || echo "")
+        local worktree_path=$(python3 -c "import json; print(json.load(open('$session')).get('worktree_path', ''))" 2>/dev/null || echo "")
+        
+        if [ -n "$worktree_path" ] && [ -d "$worktree_path" ]; then
+            echo "Removing worktree: $worktree_path"
+            git worktree remove "$worktree_path" 2>/dev/null || rm -rf "$worktree_path"
+        fi
+        
+        rm -f "$session"
+        
+        if [ -n "$issue_ref" ]; then
+            remove_issue_from_index "$issue_ref"
+        fi
+        
+        echo "Removed: $session"
+    done
+    
+    echo ""
+    echo "Pruned ${#orphaned[@]} orphaned session(s)."
+}
+
+cmd_destroy() {
+    local target="${1:-}"
+    local force=false
+    
+    if [ "$target" = "--base" ]; then
+        target=""
+    fi
+    
+    if [ "$2" = "-y" ]; then
+        force=true
+    fi
+    
+    if [ -z "$target" ]; then
+        echo "Error: target is required" >&2
+        echo "Usage: kugetsu destroy <issue-ref> [-y]" >&2
+        echo "       kugetsu destroy --pm-agent [-y]" >&2
+        echo "       kugetsu destroy --base [-y]" >&2
+        exit 1
+    fi
+    
+    if [ "$target" = "--pm-agent" ]; then
+        if [ "$force" = false ]; then
+            echo "Warning: Destroying PM agent session is not recommended." >&2
+            read -p "Continue? [y/N] " -r answer
+            if [[ ! "$answer" =~ ^[Yy]$ ]]; then
+                echo "Aborted."
+                return
+            fi
+        fi
+        
+        local pm_session=$(get_pm_agent_session_id)
+        if [ -n "$pm_session" ] && [ "$pm_session" != "null" ]; then
+            echo "Stopping PM agent session: $pm_session"
+            opencode session stop "$pm_session" 2>/dev/null || true
+        fi
+        
+        rm -f "$SESSIONS_DIR/pm-agent.json"
+        set_pm_agent_in_index "null"
+        echo "PM agent session destroyed"
+    elif [ "$target" = "--base" ]; then
+        if [ "$force" = false ]; then
+            echo "Warning: Destroying base session will remove ALL sessions." >&2
+            read -p "Continue? [y/N] " -r answer
+            if [[ ! "$answer" =~ ^[Yy]$ ]]; then
+                echo "Aborted."
+                return
+            fi
+        fi
+        
+        for session_file in "$SESSIONS_DIR"/*.json; do
+            [ -f "$session_file" ] || continue
+            rm -f "$session_file"
+        done
+        
+        for worktree in "$WORKTREES_DIR"/.kugetsu-worktrees/*; do
+            if [ -d "$worktree" ]; then
+                git worktree remove "$worktree" 2>/dev/null || rm -rf "$worktree"
+            fi
+        done
+        
+        write_index "null" "null" "{}"
+        echo "Base session and all worktrees destroyed"
+    else
+        validate_issue_ref "$target"
+        
+        local session_file=$(get_session_for_issue "$target")
+        if [ -z "$session_file" ] || [ "$session_file" = "null" ]; then
+            echo "Error: No session found for '$target'" >&2
+            exit 1
+        fi
+        
+        local session_path="$SESSIONS_DIR/$session_file"
+        
+        if [ "$force" = true ]; then
+            remove_worktree_for_issue "$target"
+            rm -f "$session_path"
+            remove_issue_from_index "$target"
+            echo "Session for '$target' destroyed"
+        else
+            echo "Warning: This will delete session and worktree for '$target'" >&2
+            read -p "Continue? [y/N] " -r answer
+            if [[ ! "$answer" =~ ^[Yy]$ ]]; then
+                echo "Aborted."
+                return
+            fi
+            
+            remove_worktree_for_issue "$target"
+            rm -f "$session_path"
+            remove_issue_from_index "$target"
+            echo "Session for '$target' destroyed"
+        fi
+    fi
+}
+
+cmd_status() {
+    echo "=== kugetsu status ==="
+    
+    local base_id=$(get_base_session_id)
+    local pm_id=$(get_pm_agent_session_id)
+    
+    if [ -z "$base_id" ] || [ "$base_id" = "null" ]; then
+        echo "Status: Not initialized"
+        echo "Run 'kugetsu init' to initialize."
+        return
+    fi
+    
+    echo "Base session: $base_id"
+    
+    if [ -n "$pm_id" ] && [ "$pm_id" != "null" ]; then
+        echo "PM agent: $pm_id"
+    else
+        echo "PM agent: not running"
+    fi
+    
+    local active_count=$(count_active_dev_sessions)
+    echo "Active issue sessions: $active_count / ${MAX_CONCURRENT_AGENTS:-3}"
+    
+    echo ""
+    echo "OpenCode sessions:"
+    opencode session list 2>/dev/null || echo "  (unable to list sessions)"
+}

skills/kugetsu/scripts/kugetsu-worktree.sh

@@ -0,0 +1,167 @@
+#!/bin/bash
+set -euo pipefail
+
+issue_ref_to_worktree_name() {
+    local issue_ref="$1"
+    echo "$issue_ref" | sed 's/[\/:]/-/g' | sed 's/#/-/'
+}
+
+issue_ref_to_worktree_path() {
+    local issue_ref="$1"
+    local parent_dir="${2:-$WORKTREES_DIR}"
+    local worktree_name=$(issue_ref_to_worktree_name "$issue_ref")
+    echo "$parent_dir/.kugetsu-worktrees/$worktree_name"
+}
+
+issue_ref_to_branch_name() {
+    local issue_ref="$1"
+    local number_part=$(echo "$issue_ref" | grep -oE '#[0-9]+$' || echo "")
+    if [ -n "$number_part" ]; then
+        echo "fix/issue-${number_part#\#}"
+    else
+        local identifier=$(echo "$issue_ref" | grep -oE '#[^-]+$' || echo "")
+        if [ -n "$identifier" ]; then
+            local clean_id=$(echo "$identifier" | sed 's/^#//' | sed 's/-/_/g')
+            echo "fix/${clean_id}"
+        else
+            echo "fix/issue-temp"
+        fi
+    fi
+}
+
+get_repo_url() {
+    local issue_ref="$1"
+    
+    if [ -f "$REPOS_CONFIG" ]; then
+        local url=$(python3 -c "import json, sys; d=json.load(open('$REPOS_CONFIG')); print(d.get('$issue_ref', ''))" 2>/dev/null || echo "")
+        if [ -n "$url" ]; then
+            echo "$url"
+            return
+        fi
+    fi
+    
+    local instance=$(echo "$issue_ref" | cut -d'/' -f1 | cut -d'#' -f1)
+    local rest=$(echo "$issue_ref" | sed 's/.*\///' | sed 's/#.*//')
+    
+    if [ -n "${GIT_SERVERS[$instance]:-}" ]; then
+        echo "${GIT_SERVERS[$instance]}/${rest}.git"
+        return
+    fi
+    
+    if [ -n "${GIT_SERVERS[$DEFAULT_GIT_SERVER]:-}" ]; then
+        echo "${GIT_SERVERS[$DEFAULT_GIT_SERVER]}/${rest}.git"
+        return
+    fi
+    
+    echo "https://${instance}/${rest}.git"
+}
+
+worktree_exists() {
+    local issue_ref="$1"
+    local parent_dir="${2:-$PWD}"
+    local worktree_path=$(issue_ref_to_worktree_path "$issue_ref" "$parent_dir")
+    [ -d "$worktree_path" ]
+}
+
+create_worktree() {
+    local issue_ref="$1"
+    local parent_dir="${2:-$PWD}"
+    local worktree_path=$(issue_ref_to_worktree_path "$issue_ref" "$parent_dir")
+    local branch_name=$(issue_ref_to_branch_name "$issue_ref")
+    local repo_url=$(get_repo_url "$issue_ref")
+    
+    if [ -z "$repo_url" ]; then
+        echo "Error: Cannot determine repo URL for '$issue_ref'" >&2
+        echo "Please add to $REPOS_CONFIG or ensure worktree exists" >&2
+        exit 1
+    fi
+    
+    local worktree_parent_dir=$(dirname "$worktree_path")
+    mkdir -p "$worktree_parent_dir"
+    
+    if worktree_exists "$issue_ref" "$parent_dir"; then
+        echo "Removing existing worktree at '$worktree_path'..."
+        git worktree remove "$worktree_path" 2>/dev/null || rm -rf "$worktree_path"
+    fi
+    
+    echo "Creating worktree at '$worktree_path'..."
+    git clone "$repo_url" "$worktree_path" 2>/dev/null || {
+        echo "Error: Failed to clone repository" >&2
+        exit 1
+    }
+    
+    echo "Creating branch '$branch_name'..."
+    (cd "$worktree_path" && git checkout -b "$branch_name" origin/main 2>/dev/null || git checkout -b "$branch_name" main 2>/dev/null) || {
+        echo "Warning: Could not checkout branch (may need to run from within worktree after session)" >&2
+    }
+    
+    echo "Worktree created at: $worktree_path"
+}
+
+remove_worktree_for_issue() {
+    local issue_ref="$1"
+    local parent_dir="${2:-$PWD}"
+    local worktree_path=$(issue_ref_to_worktree_path "$issue_ref" "$parent_dir")
+    
+    if worktree_exists "$issue_ref" "$parent_dir"; then
+        echo "Removing worktree at '$worktree_path'..."
+        git worktree remove "$worktree_path" 2>/dev/null || rm -rf "$worktree_path"
+    fi
+}
+
+get_worktree_path_for_session() {
+    local session_file="$1"
+    if [ -f "$session_file" ]; then
+        python3 -c "import json; print(json.load(open('$session_file')).get('worktree_path', ''))" 2>/dev/null || echo ""
+    else
+        echo ""
+    fi
+}
+
+check_pr_status() {
+    local pr_url="$1"
+    
+    if [ -z "$pr_url" ]; then
+        echo "no_pr_url"
+        return 1
+    fi
+    
+    local hostname=$(echo "$pr_url" | sed -E 's|https://([^/]+)/.*|\1|')
+    
+    local server_base="${GIT_SERVERS[$hostname]:-}"
+    if [ -z "$server_base" ]; then
+        echo "unknown_server"
+        return 1
+    fi
+    
+    local api_base="${server_base}/api/v1"
+    
+    local api_url=$(echo "$pr_url" | sed -E 's|https://[^/]+/([^/]+)/([^/]+)/(pulls|merge_requests)/([0-9]+)|'"${api_base}"'/repos/\1/\2/\3/\4|')
+    
+    local token=""
+    if [[ "$hostname" == "github.com" ]]; then
+        token="${GITHUB_TOKEN:-}"
+    else
+        token="${GITEA_TOKEN:-}"
+    fi
+    
+    local response
+    if [ -n "$token" ]; then
+        response=$(curl -s -H "Authorization: token $token" "$api_url" 2>/dev/null || echo "{}")
+    else
+        response=$(curl -s "$api_url" 2>/dev/null || echo "{}")
+    fi
+    
+    local state=$(echo "$response" | python3 -c "import json, sys; d=json.load(sys.stdin); print(d.get('state', 'unknown'))" 2>/dev/null || echo "unknown")
+    local merged=$(echo "$response" | python3 -c "import json, sys; d=json.load(sys.stdin); print('true' if d.get('merged', False) else 'false')" 2>/dev/null || echo "false")
+    
+    if [ "$merged" = "true" ]; then
+        echo "merged"
+    elif [ "$state" = "closed" ]; then
+        echo "closed"
+    elif [ "$state" = "open" ]; then
+        echo "open"
+    else
+        echo "unknown"
+    fi
+}