fix(queue-daemon): make base branch configurable via KUGETSU_BASE_BRANCH

- Add KUGETSU_BASE_BRANCH env var (default: origin/main)
- Update check_task_completion() to use configurable base branch
- Update create_worktree() to use configurable base branch

Closes #165

skills/kugetsu/SKILL.md

@@ -364,14 +364,10 @@ kugetsu queue-daemon logs       # Show recent daemon logs
 
 **Daemon Behavior:**
 1. Runs at configurable interval (default: 5 minutes)
-2. Checks queue for pending items
-3. For each pending item:
-   - Acquires lock to prevent duplicate processing
-   - Sources kugetsu-session.sh and calls `cmd_continue`
-   - `cmd_continue` handles worktree/session creation and forks dev agent from base session
-   - Updates queue item state to "notified"
-4. Uses per-issue locking to prevent race conditions
-5. Implements timeout for tasks that don't complete (marks as "error" after TASK_TIMEOUT_HOURS)
+2. Checks if active agents < MAX_CONCURRENT_AGENTS
+3. Picks 1-N pending items (configurable batch size)
+4. Forks PM session for each picked item
+5. PM decides whether to use `start` or `continue`
 
 **Queue Directory:**
 ```
@@ -530,13 +526,6 @@ The script will:
 
 See [docs/kugetsu-setup.md](../../docs/kugetsu-setup.md) for full Tailscale setup documentation.
 
-## Version History
-
-### v0.2.3
-- **Queue daemon context drift fix** (issue #156): Daemon now sources kugetsu-session.sh and calls `cmd_continue` directly instead of forking PM session. This fixes context drift where daemon would lose track of task state.
-- **Daemon locking**: Added per-issue locking to prevent race conditions when multiple daemon instances run.
-- **Timeout handling**: Tasks that don't complete within TASK_TIMEOUT_HOURS are marked as "error".
-
 ## Without kugetsu
 
 If kugetsu is not available, use opencode directly:

skills/kugetsu/scripts/kugetsu-config.sh

@@ -28,6 +28,7 @@ TASK_TIMEOUT_HOURS="${TASK_TIMEOUT_HOURS:-1}"
 
 NETWORK_RETRY_ATTEMPTS="${NETWORK_RETRY_ATTEMPTS:-3}"
 NETWORK_RETRY_DELAY_SECONDS="${NETWORK_RETRY_DELAY_SECONDS:-5}"
+KUGETSU_BASE_BRANCH="${KUGETSU_BASE_BRANCH:-origin/main}"
 
 # Load user config overrides (~/.kugetsu/config)
 if [ -f "$KUGETSU_DIR/config" ]; then

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

@@ -75,7 +75,7 @@ check_task_completion() {
             local has_commits=false
 
             if [ -d "$worktree_path" ] && [ -d "$worktree_path/.git" ]; then
-                if [ -n "$(git -C "$worktree_path" log --oneline origin/main..HEAD 2>/dev/null)" ]; then
+                if [ -n "$(git -C "$worktree_path" log --oneline "$KUGETSU_BASE_BRANCH..HEAD" 2>/dev/null)" ]; then
                     has_commits=true
                 fi
             fi
@@ -95,7 +95,7 @@ check_task_completion() {
             local has_commits=false
 
             if [ -d "$worktree_path" ] && [ -d "$worktree_path/.git" ]; then
-                if [ -n "$(git -C "$worktree_path" log --oneline origin/main..HEAD 2>/dev/null)" ]; then
+                if [ -n "$(git -C "$worktree_path" log --oneline "$KUGETSU_BASE_BRANCH..HEAD" 2>/dev/null)" ]; then
                     has_commits=true
                 fi
             fi

skills/kugetsu/scripts/kugetsu-worktree.sh

@@ -109,7 +109,7 @@ create_worktree() {
     fi
     
     echo "Creating branch '$branch_name'..."
-    if git -C "$worktree_path" checkout -b "$branch_name" origin/main 2>/dev/null; then
+    if git -C "$worktree_path" checkout -b "$branch_name" "$KUGETSU_BASE_BRANCH" 2>/dev/null; then
         :
     elif git -C "$worktree_path" checkout -b "$branch_name" main 2>/dev/null; then
         :