fix(kugetsu): wrap cmd_continue in subshell with cd for correct worktree dir

The --dir flag only sets directory for the subprocess, not the session's
stored directory in opencode's SQLite DB. This was already fixed for
cmd_start in v0.1.10, but cmd_continue still had the bug.

Fixes #127

skills/kugetsu/scripts/kugetsu

@@ -394,6 +394,41 @@ kugetsu_get_pm_context() {
     fi
 }
 
+kugetsu_get_fork_context() {
+    local issue_ref="$1"
+    local context=""
+    
+    context="## IMPORTANT WORKING RULES
+
+1. You are working on issue: $issue_ref
+2. If you encounter ANY error, blocker, or cannot complete the task:
+   - STOP immediately
+   - Log what happened and why you cannot proceed
+   - Do NOT switch to other work or try alternative approaches
+3. Do NOT work on other issues or PRs unless explicitly asked
+4. Environment variables are available in ~/.kugetsu/env/
+
+"
+    
+    if [ -f "$REPOS_CONFIG" ]; then
+        context="${context}
+## REPOSITORIES CONFIG
+$(cat "$REPOS_CONFIG")
+
+"
+    fi
+    
+    if [ -f "$ENV_DIR/default.env" ]; then
+        context="${context}
+## ENVIRONMENT (available at ~/.kugetsu/env/)
+Environment file exists at: $ENV_DIR/default.env
+Source it with: source ~/.kugetsu/env/default.env
+"
+    fi
+    
+    echo "$context"
+}
+
 kugetsu_add_notification() {
     local type="$1"
     local message="$2"
@@ -1088,6 +1123,11 @@ EOF
         echo "Created pm-agent env file: $ENV_DIR/pm-agent.env"
     fi
 
+    if [ -d "$LOGS_DIR" ]; then
+        echo "Cleaning up old logs..."
+        rm -rf "$LOGS_DIR"/*.log 2>/dev/null || true
+    fi
+
     local existing_base=$(get_base_session_id)
     local existing_pm=$(get_pm_agent_session_id)
     
@@ -1107,12 +1147,19 @@ EOF
         exit 1
     fi
 
+    local init_worktree_dir="$HOME/.kugetsu-worktrees"
+    mkdir -p "$init_worktree_dir"
+    cd "$init_worktree_dir"
+    echo "Initialized kugetsu worktrees directory: $init_worktree_dir"
+    echo "Base session will be created in this directory."
+    echo ""
+
     local cwd_files=$(ls -A "$PWD" 2>/dev/null | wc -l)
     local cwd_git=$(git rev-parse --is-inside-work-tree 2>/dev/null || echo "false")
     if [ "$cwd_files" -gt 0 ] || [ "$cwd_git" = "true" ]; then
-        echo "Warning: Current directory is not empty: $PWD" >&2
+        echo "Warning: Worktrees directory is not empty: $PWD" >&2
         echo "This may cause project context to contaminate the base session." >&2
-        echo "Consider running kugetsu init from an empty directory." >&2
+        echo "Consider running kugetsu destroy --base -y and reinitializing." >&2
         echo "" >&2
         echo "Files in current directory: $cwd_files" >&2
         if [ "$cwd_git" = "true" ]; then
@@ -1257,13 +1304,19 @@ cmd_start() {
     local opencode_db="${OPENCODE_DB:-$HOME/.local/share/opencode/opencode.db}"
     
     > "$fork_log"
-     
+    
+    local fork_context=$(kugetsu_get_fork_context "$issue_ref")
+    local full_message="${fork_context}
+
+## YOUR TASK
+$message"
+    
     fix_session_permissions
     
     if [ "$DEBUG_MODE" = true ]; then
-        (cd "$worktree_path" && opencode run "$message" --fork --session "$base_session_id" --dir "$worktree_path" 2>&1) | tee "$fork_log" &
+        (cd "$worktree_path" && opencode run "$full_message" --fork --session "$base_session_id" --dir "$worktree_path" 2>&1) | tee "$fork_log" &
     else
-        (cd "$worktree_path" && opencode run "$message" --fork --session "$base_session_id" --dir "$worktree_path" 2>&1) >> "$fork_log" &
+        (cd "$worktree_path" && opencode run "$full_message" --fork --session "$base_session_id" --dir "$worktree_path" 2>&1) >> "$fork_log" &
     fi
 
     local fork_pid=$!
@@ -1386,12 +1439,13 @@ cmd_continue() {
 
     echo "Continuing session for '$session_name'..."
     # Note: --continue always allowed (existing sessions don't count toward limit)
+    # Wrap in subshell with cd to ensure worktree directory is set correctly in session DB
     if [ -n "$worktree_path" ] && [ -d "$worktree_path" ]; then
         echo "Using worktree: $worktree_path"
         if [ "$DEBUG_MODE" = true ]; then
-            opencode run "$message" --continue --session "$opencode_session_id" --dir "$worktree_path" 2>&1 | tee "$session_path.debug.log" &
+            (cd "$worktree_path" && opencode run "$message" --continue --session "$opencode_session_id" --dir "$worktree_path" 2>&1) | tee "$session_path.debug.log" &
         else
-            opencode run "$message" --continue --session "$opencode_session_id" --dir "$worktree_path" 2>&1 &
+            (cd "$worktree_path" && opencode run "$message" --continue --session "$opencode_session_id" --dir "$worktree_path" 2>&1) &
         fi
     else
         if [ "$DEBUG_MODE" = true ]; then
@@ -1549,19 +1603,21 @@ cmd_destroy() {
     if [ "$target" = "base" ]; then
         if [ "$force" = true ]; then
             local base_session_id=$(get_base_session_id)
+            local pm_agent_session_id=$(get_pm_agent_session_id)
             rm -f "$SESSIONS_DIR/base.json"
-            local pm_agent=$(get_pm_agent_session_id)
-            if [ -n "$pm_agent" ] && [ "$pm_agent" != "null" ]; then
-                rm -f "$SESSIONS_DIR/pm-agent.json"
-                echo '{"base": null, "pm_agent": null, "issues": {}}' > "$INDEX_FILE"
-            else
-                echo '{"base": null, "pm_agent": null, "issues": {}}' > "$INDEX_FILE"
-            fi
+            rm -f "$SESSIONS_DIR/pm-agent.json"
+            rm -f "$SESSIONS_DIR/issue-"*.json 2>/dev/null || true
+            echo '{"base": null, "pm_agent": null, "issues": {}}' > "$INDEX_FILE"
+            
             if [ -n "$base_session_id" ] && [ "$base_session_id" != "null" ]; then
-                echo "Deleting opencode session: $base_session_id"
-                opencode session delete "$base_session_id" 2>/dev/null || echo "Warning: Could not delete session from opencode (may already be deleted)"
+                echo "Deleting base session: $base_session_id"
+                opencode session delete "$base_session_id" 2>/dev/null || echo "Warning: Could not delete base session"
             fi
-            echo "Base session destroyed"
+            if [ -n "$pm_agent_session_id" ] && [ "$pm_agent_session_id" != "null" ]; then
+                echo "Deleting PM agent session: $pm_agent_session_id"
+                opencode session delete "$pm_agent_session_id" 2>/dev/null || echo "Warning: Could not delete PM agent session"
+            fi
+            echo "Base and PM agent sessions destroyed"
         else
             echo "Error: destroying base session requires --base -y" >&2
             exit 1