chore: add project planning-with-files hooks

.codex/skills/planning-with-files/scripts/set-active-plan.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+# planning-with-files: set or display the active plan pointer.
+#
+# Usage:
+#   set-active-plan.sh <plan_id>   — pin .planning/.active_plan to plan_id
+#   set-active-plan.sh             — print the current active plan (if any)
+#
+# The active plan is stored in .planning/.active_plan and is read by
+# resolve-plan-dir.sh when no $PLAN_ID env var is set.
+
+set -e
+
+PLAN_ROOT="${PWD}/.planning"
+ACTIVE_FILE="${PLAN_ROOT}/.active_plan"
+
+# No args → show current active plan
+if [ "${1:-}" = "" ]; then
+    if [ -f "${ACTIVE_FILE}" ]; then
+        plan_id="$(tr -d '\r\n' < "${ACTIVE_FILE}")"
+        if [ -n "${plan_id}" ] && [ -d "${PLAN_ROOT}/${plan_id}" ]; then
+            echo "Active plan: ${plan_id}"
+            echo "Path: ${PLAN_ROOT}/${plan_id}"
+        elif [ -n "${plan_id}" ]; then
+            echo "Active plan pointer: ${plan_id} (directory not found — stale pointer)"
+        else
+            echo "No active plan set."
+        fi
+    else
+        echo "No active plan set."
+    fi
+    exit 0
+fi
+
+PLAN_ID="$1"
+PLAN_DIR="${PLAN_ROOT}/${PLAN_ID}"
+
+if [ ! -d "${PLAN_DIR}" ]; then
+    echo "Error: plan directory not found: ${PLAN_DIR}" >&2
+    echo "Run: init-session.sh \"${PLAN_ID}\" to create it, or check .planning/ for available plans." >&2
+    exit 1
+fi
+
+mkdir -p "${PLAN_ROOT}"
+printf "%s\n" "${PLAN_ID}" > "${ACTIVE_FILE}"
+
+echo "Active plan set to: ${PLAN_ID}"
+echo "Path: ${PLAN_DIR}"
+echo ""
+echo "To pin this terminal session only:"
+echo "  export PLAN_ID=${PLAN_ID}"