diff --git a/include/crm/common/scheduler.h b/include/crm/common/scheduler.h
index 5eb8b03600..47ed0ccdbd 100644
--- a/include/crm/common/scheduler.h
+++ b/include/crm/common/scheduler.h
@@ -1,242 +1,249 @@
 /*
  * Copyright 2004-2023 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
  * This source code is licensed under the GNU Lesser General Public License
  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
  */
 
 #ifndef PCMK__CRM_COMMON_SCHEDULER__H
 #  define PCMK__CRM_COMMON_SCHEDULER__H
 
 #include <sys/types.h>                  // time_t
 #include <libxml/tree.h>                // xmlNode
 #include <glib.h>                       // guint, GList, GHashTable
 
 #include <crm/common/iso8601.h>         // crm_time_t
 
 #include <crm/common/actions.h>
 #include <crm/common/nodes.h>
 #include <crm/common/resources.h>
 #include <crm/common/roles.h>
 #include <crm/common/rules.h>
 #include <crm/common/scheduler_types.h>
 #include <crm/common/tags.h>
 #include <crm/common/tickets.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*!
  * \file
  * \brief Scheduler API
  * \ingroup core
  */
 
 //! Possible responses to loss of quorum
 enum pe_quorum_policy {
     pcmk_no_quorum_freeze,  //<! Do not recover resources from outside partition
     pcmk_no_quorum_stop,    //<! Stop all resources in partition
     pcmk_no_quorum_ignore,  //<! Act as if partition still holds quorum
     pcmk_no_quorum_fence,   //<! Fence all nodes in partition
     pcmk_no_quorum_demote,  //<! Demote promotable resources and stop all others
 
 #if !defined(PCMK_ALLOW_DEPRECATED) || (PCMK_ALLOW_DEPRECATED == 1)
     //! \deprecated Use pcmk_no_quorum_freeze instead
     no_quorum_freeze    = pcmk_no_quorum_freeze,
 
     //! \deprecated Use pcmk_no_quorum_stop instead
     no_quorum_stop      = pcmk_no_quorum_stop,
 
     //! \deprecated Use pcmk_no_quorum_ignore instead
     no_quorum_ignore    = pcmk_no_quorum_ignore,
 
     //! \deprecated Use pcmk_no_quorum_fence instead
     no_quorum_suicide   = pcmk_no_quorum_fence,
 
     //! \deprecated Use pcmk_no_quorum_demote instead
     no_quorum_demote    = pcmk_no_quorum_demote,
 #endif
 };
 
 //! Scheduling options and conditions
 enum pcmk_scheduler_flags {
     //! No scheduler flags set (compare with equality rather than bit set)
     pcmk_sched_none                     = 0ULL,
 
     // These flags are dynamically determined conditions
 
     //! Whether partition has quorum (via have-quorum property)
     pcmk_sched_quorate                  = (1ULL << 0),
 
     //! Whether cluster is symmetric (via symmetric-cluster property)
     pcmk_sched_symmetric_cluster        = (1ULL << 1),
 
     //! Whether cluster is in maintenance mode (via maintenance-mode property)
     pcmk_sched_in_maintenance           = (1ULL << 3),
 
     //! Whether fencing is enabled (via stonith-enabled property)
     pcmk_sched_fencing_enabled          = (1ULL << 4),
 
     //! Whether cluster has a fencing resource (via CIB resources)
     pcmk_sched_have_fencing             = (1ULL << 5),
 
     //! Whether any resource provides or requires unfencing (via CIB resources)
     pcmk_sched_enable_unfencing         = (1ULL << 6),
 
     //! Whether concurrent fencing is allowed (via concurrent-fencing property)
     pcmk_sched_concurrent_fencing       = (1ULL << 7),
 
     /*!
      * Whether resources removed from the configuration should be stopped (via
      * stop-orphan-resources property)
      */
     pcmk_sched_stop_removed_resources   = (1ULL << 8),
 
     /*!
      * Whether recurring actions removed from the configuration should be
      * cancelled (via stop-orphan-actions property)
      */
     pcmk_sched_cancel_removed_actions   = (1ULL << 9),
 
     //! Whether to stop all resources (via stop-all-resources property)
     pcmk_sched_stop_all                 = (1ULL << 10),
 
     /*!
      * Whether start failure should be treated as if migration-threshold is 1
      * (via start-failure-is-fatal property)
      */
     pcmk_sched_start_failure_fatal      = (1ULL << 12),
 
     //! \deprecated Do not use
     pcmk_sched_remove_after_stop        = (1ULL << 13),
 
     //! Whether unseen nodes should be fenced (via startup-fencing property)
     pcmk_sched_startup_fencing          = (1ULL << 14),
 
     /*!
      * Whether resources should be left stopped when their node shuts down
      * cleanly (via shutdown-lock property)
      */
     pcmk_sched_shutdown_lock            = (1ULL << 15),
 
     /*!
      * Whether resources' current state should be probed (when unknown) before
      * scheduling any other actions (via the enable-startup-probes property)
      */
     pcmk_sched_probe_resources          = (1ULL << 16),
 
     //! Whether the CIB status section has been parsed yet
     pcmk_sched_have_status              = (1ULL << 17),
 
     //! Whether the cluster includes any Pacemaker Remote nodes (via CIB)
     pcmk_sched_have_remote_nodes        = (1ULL << 18),
 
     // The remaining flags are scheduling options that must be set explicitly
 
     /*!
      * Whether to skip unpacking the CIB status section and stop the scheduling
      * sequence after applying node-specific location criteria (skipping
      * assignment, ordering, actions, etc.).
      */
     pcmk_sched_location_only            = (1ULL << 20),
 
     //! Whether sensitive resource attributes have been masked
     pcmk_sched_sanitized                = (1ULL << 21),
 
     //! Skip counting of total, disabled, and blocked resource instances
     pcmk_sched_no_counts                = (1ULL << 23),
 
     /*!
      * Skip deprecated code kept solely for backward API compatibility
      * (internal code should always set this)
      */
     pcmk_sched_no_compat                = (1ULL << 24),
 
     //! Whether node scores should be output instead of logged
     pcmk_sched_output_scores            = (1ULL << 25),
 
     //! Whether to show node and resource utilization (in log or output)
     pcmk_sched_show_utilization         = (1ULL << 26),
 
     /*!
      * Whether to stop the scheduling sequence after unpacking the CIB,
      * calculating cluster status, and applying node health (skipping
      * applying node-specific location criteria, assignment, etc.)
      */
     pcmk_sched_validate_only            = (1ULL << 27),
 };
 
 //! Implementation of pcmk_scheduler_t
 struct pe_working_set_s {
     // Be careful about when each piece of information is available and final
 
     xmlNode *input;                 //!< CIB XML
     crm_time_t *now;                //!< Current time for evaluation purposes
     char *dc_uuid;                  //!< Node ID of designated controller
     pcmk_node_t *dc_node;           //!< Node object for DC
     const char *stonith_action;     //!< Default fencing action
     const char *placement_strategy; //!< Value of placement-strategy property
 
     // @COMPAT Change to uint64_t at a compatibility break
     unsigned long long flags;       //!< Group of enum pcmk_scheduler_flags
 
     int stonith_timeout;            //!< Value of stonith-timeout property
     enum pe_quorum_policy no_quorum_policy; //!< Response to loss of quorum
     GHashTable *config_hash;        //!< Cluster properties
 
     //!< Ticket constraints unpacked from ticket state
     GHashTable *tickets;
 
     //! Actions for which there can be only one (such as "fence node X")
     GHashTable *singletons;
 
     GList *nodes;                   //!< Nodes in cluster
     GList *resources;               //!< Resources in cluster
     GList *placement_constraints;   //!< Location constraints
     GList *ordering_constraints;    //!< Ordering constraints
     GList *colocation_constraints;  //!< Colocation constraints
 
     //!< Ticket constraints unpacked by libpacemaker
     GList *ticket_constraints;
 
     GList *actions;                 //!< Scheduled actions
     xmlNode *failed;                //!< History entries of failed actions
     xmlNode *op_defaults;           //!< Configured operation defaults
     xmlNode *rsc_defaults;          //!< Configured resource defaults
     int num_synapse;                //!< Number of transition graph synapses
     int max_valid_nodes;            //!< \deprecated Do not use
     int order_id;                   //!< ID to use for next created ordering
     int action_id;                  //!< ID to use for next created action
     xmlNode *graph;                 //!< Transition graph
     GHashTable *template_rsc_sets;  //!< Mappings of template ID to resource ID
 
     // @COMPAT Replace this with a fencer variable (only place it's used)
     const char *localhost;          //!< \deprecated Do not use
 
     GHashTable *tags;               //!< Configuration tags (ID -> pcmk_tag_t *)
     int blocked_resources;          //!< Number of blocked resources in cluster
     int disabled_resources;         //!< Number of disabled resources in cluster
     GList *param_check;             //!< History entries that need to be checked
     GList *stop_needed;             //!< Containers that need stop actions
     time_t recheck_by;              //!< Hint to controller when to reschedule
     int ninstances;                 //!< Total number of resource instances
     guint shutdown_lock;            //!< How long to lock resources (seconds)
     int priority_fencing_delay;     //!< Priority fencing delay
 
     // pcmk__output_t *
     void *priv;                     //!< For Pacemaker use only
 
     guint node_pending_timeout;     //!< Pending join times out after this (ms)
 };
 
-// Whether the scheduler input currently being processed has errors
+/* Whether the scheduler input currently being processed has errors
+ *
+ * @COMPAT When we can break API compatibility, we should make this
+ * internal-only. Ideally it would be converted to a pcmk_scheduler_flags
+ * value, but everywhere it's needed doesn't currently have access to the
+ * scheduler data.
+ */
+//! \deprecated Do not use
 extern gboolean was_processing_error;
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif // PCMK__CRM_COMMON_SCHEDULER__H