diff --git a/crates/console/prometeu-hal/src/debugger_protocol.rs b/crates/console/prometeu-hal/src/debugger_protocol.rs
index 033c0cc2..cc6e8950 100644
--- a/crates/console/prometeu-hal/src/debugger_protocol.rs
+++ b/crates/console/prometeu-hal/src/debugger_protocol.rs
@@ -68,6 +68,8 @@ pub enum DebugEvent {
         glyph_slots_total: u32,
         sound_slots_used: u32,
         sound_slots_total: u32,
+        scene_slots_used: u32,
+        scene_slots_total: u32,
     },
     #[serde(rename = "fault")]
     Fault {
@@ -99,6 +101,8 @@ mod tests {
             glyph_slots_total: 16,
             sound_slots_used: 2,
             sound_slots_total: 16,
+            scene_slots_used: 3,
+            scene_slots_total: 16,
         };
 
         let json = serde_json::to_string(&event).unwrap();
diff --git a/crates/console/prometeu-hal/src/syscalls.rs b/crates/console/prometeu-hal/src/syscalls.rs
index 3e9b269a..d63173a1 100644
--- a/crates/console/prometeu-hal/src/syscalls.rs
+++ b/crates/console/prometeu-hal/src/syscalls.rs
@@ -64,7 +64,6 @@ pub enum Syscall {
     AssetCommit = 0x6003,
     AssetCancel = 0x6004,
     BankInfo = 0x6101,
-    BankSlotInfo = 0x6102,
 }
 
 /// Canonical metadata describing a syscall using the unified slot-based ABI.
diff --git a/crates/console/prometeu-hal/src/syscalls/domains/bank.rs b/crates/console/prometeu-hal/src/syscalls/domains/bank.rs
index 87a7ef1b..2fda20d9 100644
--- a/crates/console/prometeu-hal/src/syscalls/domains/bank.rs
+++ b/crates/console/prometeu-hal/src/syscalls/domains/bank.rs
@@ -1,12 +1,7 @@
 use crate::syscalls::{Syscall, SyscallRegistryEntry, caps};
 
-pub(crate) const ENTRIES: &[SyscallRegistryEntry] = &[
-    SyscallRegistryEntry::builder(Syscall::BankInfo, "bank", "info")
+pub(crate) const ENTRIES: &[SyscallRegistryEntry] =
+    &[SyscallRegistryEntry::builder(Syscall::BankInfo, "bank", "info")
         .args(1)
-        .rets(1)
-        .caps(caps::BANK),
-    SyscallRegistryEntry::builder(Syscall::BankSlotInfo, "bank", "slot_info")
-        .args(2)
-        .rets(1)
-        .caps(caps::BANK),
-];
+        .rets(2)
+        .caps(caps::BANK)];
diff --git a/crates/console/prometeu-hal/src/syscalls/registry.rs b/crates/console/prometeu-hal/src/syscalls/registry.rs
index b8007c71..7b353b1a 100644
--- a/crates/console/prometeu-hal/src/syscalls/registry.rs
+++ b/crates/console/prometeu-hal/src/syscalls/registry.rs
@@ -48,7 +48,6 @@ impl Syscall {
             0x6003 => Some(Self::AssetCommit),
             0x6004 => Some(Self::AssetCancel),
             0x6101 => Some(Self::BankInfo),
-            0x6102 => Some(Self::BankSlotInfo),
             _ => None,
         }
     }
@@ -99,7 +98,6 @@ impl Syscall {
             Self::AssetCommit => "AssetCommit",
             Self::AssetCancel => "AssetCancel",
             Self::BankInfo => "BankInfo",
-            Self::BankSlotInfo => "BankSlotInfo",
         }
     }
 }
diff --git a/crates/console/prometeu-hal/src/syscalls/tests.rs b/crates/console/prometeu-hal/src/syscalls/tests.rs
index 3129d813..362a6687 100644
--- a/crates/console/prometeu-hal/src/syscalls/tests.rs
+++ b/crates/console/prometeu-hal/src/syscalls/tests.rs
@@ -249,6 +249,22 @@ fn status_first_syscall_signatures_are_pinned() {
     let asset_cancel = meta_for(Syscall::AssetCancel);
     assert_eq!(asset_cancel.arg_slots, 1);
     assert_eq!(asset_cancel.ret_slots, 1);
+
+    let bank_info = meta_for(Syscall::BankInfo);
+    assert_eq!(bank_info.arg_slots, 1);
+    assert_eq!(bank_info.ret_slots, 2);
+}
+
+#[test]
+fn resolver_rejects_removed_bank_slot_info_identity() {
+    assert!(resolve_syscall("bank", "slot_info", 1).is_none());
+
+    let requested = [SyscallIdentity { module: "bank", name: "slot_info", version: 1 }];
+    let err = resolve_program_syscalls(&requested, caps::ALL).unwrap_err();
+    assert_eq!(
+        err,
+        LoadError::UnknownSyscall { module: "bank".into(), name: "slot_info".into(), version: 1 }
+    );
 }
 
 #[test]
diff --git a/crates/console/prometeu-hal/src/telemetry.rs b/crates/console/prometeu-hal/src/telemetry.rs
index 0965a95d..8dd9ea75 100644
--- a/crates/console/prometeu-hal/src/telemetry.rs
+++ b/crates/console/prometeu-hal/src/telemetry.rs
@@ -18,6 +18,8 @@ pub struct TelemetryFrame {
     pub glyph_slots_total: u32,
     pub sound_slots_used: u32,
     pub sound_slots_total: u32,
+    pub scene_slots_used: u32,
+    pub scene_slots_total: u32,
 
     // RAM (Heap)
     pub heap_used_bytes: usize,
@@ -45,6 +47,8 @@ pub struct AtomicTelemetry {
     pub glyph_slots_total: AtomicU32,
     pub sound_slots_used: AtomicU32,
     pub sound_slots_total: AtomicU32,
+    pub scene_slots_used: AtomicU32,
+    pub scene_slots_total: AtomicU32,
 
     // RAM (Heap)
     pub heap_used_bytes: AtomicUsize,
@@ -75,6 +79,8 @@ impl AtomicTelemetry {
             glyph_slots_total: self.glyph_slots_total.load(Ordering::Relaxed),
             sound_slots_used: self.sound_slots_used.load(Ordering::Relaxed),
             sound_slots_total: self.sound_slots_total.load(Ordering::Relaxed),
+            scene_slots_used: self.scene_slots_used.load(Ordering::Relaxed),
+            scene_slots_total: self.scene_slots_total.load(Ordering::Relaxed),
             heap_used_bytes: self.heap_used_bytes.load(Ordering::Relaxed),
             heap_max_bytes: self.heap_max_bytes.load(Ordering::Relaxed),
             logs_count: self.logs_count.load(Ordering::Relaxed),
@@ -93,6 +99,8 @@ impl AtomicTelemetry {
         self.glyph_slots_total.store(0, Ordering::Relaxed);
         self.sound_slots_used.store(0, Ordering::Relaxed);
         self.sound_slots_total.store(0, Ordering::Relaxed);
+        self.scene_slots_used.store(0, Ordering::Relaxed);
+        self.scene_slots_total.store(0, Ordering::Relaxed);
         self.heap_used_bytes.store(0, Ordering::Relaxed);
         self.vm_steps.store(0, Ordering::Relaxed);
         self.logs_count.store(0, Ordering::Relaxed);
diff --git a/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs b/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
index 2a0fb39b..fdf0c963 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
@@ -567,19 +567,8 @@ impl NativeInterface for VirtualMachineRuntime {
                         used_slots: 0,
                         total_slots: 0,
                     });
-                let json = serde_json::to_string(&telemetry).unwrap_or_default();
-                ret.push_string(json);
-                Ok(())
-            }
-            Syscall::BankSlotInfo => {
-                let asset_type = match expect_int(args, 0)? as u32 {
-                    0 => BankType::GLYPH,
-                    1 => BankType::SOUNDS,
-                    _ => return Err(VmFault::Trap(TRAP_TYPE, "Invalid asset type".to_string())),
-                };
-                let slot = SlotRef { asset_type, index: expect_int(args, 1)? as usize };
-                let json = serde_json::to_string(&hw.assets().slot_info(slot)).unwrap_or_default();
-                ret.push_string(json);
+                ret.push_int(telemetry.used_slots as i64);
+                ret.push_int(telemetry.total_slots as i64);
                 Ok(())
             }
         }
diff --git a/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs b/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
index 6ca08d2b..df491343 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
@@ -937,6 +937,60 @@ fn tick_asset_status_unknown_handle_returns_status_not_crash() {
     assert_eq!(vm.operand_stack_top(1), vec![Value::Int64(LoadStatus::UnknownHandle as i64)]);
 }
 
+#[test]
+fn tick_bank_info_returns_slot_summary_not_json() {
+    let mut runtime = VirtualMachineRuntime::new(None);
+    let mut vm = VirtualMachine::default();
+    let mut hardware = Hardware::new();
+    let signals = InputSignals::default();
+    let asset_data = test_glyph_asset_data();
+    hardware.assets.initialize_for_cartridge(
+        vec![test_glyph_asset_entry("tile_asset", asset_data.len())],
+        vec![prometeu_hal::asset::PreloadEntry { asset_id: 7, slot: 0 }],
+        AssetsPayloadSource::from_bytes(asset_data),
+    );
+    let code = assemble("PUSH_I32 0\nHOSTCALL 0\nHALT").expect("assemble");
+    let program = serialized_single_function_module(
+        code,
+        vec![SyscallDecl {
+            module: "bank".into(),
+            name: "info".into(),
+            version: 1,
+            arg_slots: 1,
+            ret_slots: 2,
+        }],
+    );
+    let cartridge = cartridge_with_program(program, caps::BANK);
+
+    runtime.initialize_vm(&mut vm, &cartridge).expect("runtime must initialize");
+    let report = runtime.tick(&mut vm, &signals, &mut hardware);
+    assert!(report.is_none(), "bank summary must not crash");
+    assert!(vm.is_halted());
+    assert_eq!(vm.operand_stack_top(2), vec![Value::Int64(16), Value::Int64(1)]);
+}
+
+#[test]
+fn initialize_vm_rejects_removed_bank_slot_info_syscall_identity() {
+    let mut runtime = VirtualMachineRuntime::new(None);
+    let mut vm = VirtualMachine::default();
+    let code = assemble("PUSH_I32 0\nPUSH_I32 0\nHOSTCALL 0\nHALT").expect("assemble");
+    let program = serialized_single_function_module(
+        code,
+        vec![SyscallDecl {
+            module: "bank".into(),
+            name: "slot_info".into(),
+            version: 1,
+            arg_slots: 2,
+            ret_slots: 1,
+        }],
+    );
+    let cartridge = cartridge_with_program(program, caps::BANK);
+
+    let res = runtime.initialize_vm(&mut vm, &cartridge);
+
+    assert!(matches!(res, Err(CrashReport::VmInit { error: VmInitError::LoaderPatchFailed(_) })));
+}
+
 #[test]
 fn tick_asset_commit_invalid_transition_returns_status_not_crash() {
     let mut runtime = VirtualMachineRuntime::new(None);
diff --git a/crates/console/prometeu-system/src/virtual_machine_runtime/tick.rs b/crates/console/prometeu-system/src/virtual_machine_runtime/tick.rs
index 4a281f66..72c67b1d 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/tick.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/tick.rs
@@ -7,7 +7,9 @@ use prometeu_vm::LogicalFrameEndingReason;
 use std::sync::atomic::Ordering;
 
 impl VirtualMachineRuntime {
-    fn bank_telemetry_summary(hw: &dyn HardwareBridge) -> (BankTelemetry, BankTelemetry) {
+    fn bank_telemetry_summary(
+        hw: &dyn HardwareBridge,
+    ) -> (BankTelemetry, BankTelemetry, BankTelemetry) {
         let telemetry = hw.assets().bank_telemetry();
         let glyph =
             telemetry.iter().find(|entry| entry.bank_type == BankType::GLYPH).cloned().unwrap_or(
@@ -17,8 +19,12 @@ impl VirtualMachineRuntime {
             telemetry.iter().find(|entry| entry.bank_type == BankType::SOUNDS).cloned().unwrap_or(
                 BankTelemetry { bank_type: BankType::SOUNDS, used_slots: 0, total_slots: 0 },
             );
+        let scenes =
+            telemetry.iter().find(|entry| entry.bank_type == BankType::SCENE).cloned().unwrap_or(
+                BankTelemetry { bank_type: BankType::SCENE, used_slots: 0, total_slots: 0 },
+            );
 
-        (glyph, sounds)
+        (glyph, sounds, scenes)
     }
 
     pub fn debug_step_instruction(
@@ -148,7 +154,7 @@ impl VirtualMachineRuntime {
                         hw.render_frame();
 
                         // 1. Snapshot full telemetry at logical frame end
-                        let (glyph_bank, sound_bank) = Self::bank_telemetry_summary(hw);
+                        let (glyph_bank, sound_bank, scene_bank) = Self::bank_telemetry_summary(hw);
                         self.atomic_telemetry
                             .glyph_slots_used
                             .store(glyph_bank.used_slots as u32, Ordering::Relaxed);
@@ -161,6 +167,12 @@ impl VirtualMachineRuntime {
                         self.atomic_telemetry
                             .sound_slots_total
                             .store(sound_bank.total_slots as u32, Ordering::Relaxed);
+                        self.atomic_telemetry
+                            .scene_slots_used
+                            .store(scene_bank.used_slots as u32, Ordering::Relaxed);
+                        self.atomic_telemetry
+                            .scene_slots_total
+                            .store(scene_bank.total_slots as u32, Ordering::Relaxed);
 
                         self.atomic_telemetry
                             .heap_used_bytes
@@ -218,7 +230,7 @@ impl VirtualMachineRuntime {
 
         // 2. High-frequency telemetry update (only if inspection is active)
         if self.inspection_active {
-            let (glyph_bank, sound_bank) = Self::bank_telemetry_summary(hw);
+            let (glyph_bank, sound_bank, scene_bank) = Self::bank_telemetry_summary(hw);
             self.atomic_telemetry
                 .glyph_slots_used
                 .store(glyph_bank.used_slots as u32, Ordering::Relaxed);
@@ -231,6 +243,12 @@ impl VirtualMachineRuntime {
             self.atomic_telemetry
                 .sound_slots_total
                 .store(sound_bank.total_slots as u32, Ordering::Relaxed);
+            self.atomic_telemetry
+                .scene_slots_used
+                .store(scene_bank.used_slots as u32, Ordering::Relaxed);
+            self.atomic_telemetry
+                .scene_slots_total
+                .store(scene_bank.total_slots as u32, Ordering::Relaxed);
 
             self.atomic_telemetry
                 .heap_used_bytes
diff --git a/crates/host/prometeu-host-desktop-winit/src/debugger.rs b/crates/host/prometeu-host-desktop-winit/src/debugger.rs
index 2127459b..c698ec2e 100644
--- a/crates/host/prometeu-host-desktop-winit/src/debugger.rs
+++ b/crates/host/prometeu-host-desktop-winit/src/debugger.rs
@@ -2,6 +2,7 @@ use prometeu_drivers::hardware::Hardware;
 use prometeu_firmware::{BootTarget, Firmware};
 use prometeu_hal::cartridge_loader::CartridgeLoader;
 use prometeu_hal::debugger_protocol::*;
+use prometeu_hal::telemetry::{CertificationConfig, TelemetryFrame};
 use prometeu_system::CrashReport;
 use std::io::{Read, Write};
 use std::net::{TcpListener, TcpStream};
@@ -12,6 +13,8 @@ use std::net::{TcpListener, TcpStream};
 /// Prometeu Debugger) to observe and control the execution of the virtual machine.
 ///
 /// Communication is based on JSONL (JSON lines) over TCP.
+/// Detailed inspection and certification events are synthesized in the host
+/// from telemetry snapshots and host/runtime integration state.
 pub struct HostDebugger {
     /// If true, the VM will not start execution until a 'start' command is received.
     pub waiting_for_start: bool,
@@ -230,6 +233,72 @@ impl HostDebugger {
         }
     }
 
+    pub(crate) fn cert_event_from_snapshot(
+        tag: u16,
+        telemetry: TelemetryFrame,
+        cert_config: &CertificationConfig,
+        frame_index: u64,
+    ) -> Option<DebugEvent> {
+        let (rule, used, limit) = match tag {
+            0xCA01 => (
+                "cycles_budget".to_string(),
+                telemetry.cycles_used,
+                cert_config.cycles_budget_per_frame.unwrap_or(0),
+            ),
+            0xCA02 => (
+                "max_syscalls".to_string(),
+                telemetry.syscalls as u64,
+                cert_config.max_syscalls_per_frame.unwrap_or(0) as u64,
+            ),
+            0xCA03 => (
+                "max_host_cpu_us".to_string(),
+                telemetry.host_cpu_time_us,
+                cert_config.max_host_cpu_us_per_frame.unwrap_or(0),
+            ),
+            0xCA04 => (
+                "max_glyph_slots_used".to_string(),
+                telemetry.glyph_slots_used as u64,
+                cert_config.max_glyph_slots_used.unwrap_or(0) as u64,
+            ),
+            0xCA05 => (
+                "max_sound_slots_used".to_string(),
+                telemetry.sound_slots_used as u64,
+                cert_config.max_sound_slots_used.unwrap_or(0) as u64,
+            ),
+            0xCA06 => (
+                "max_heap_bytes".to_string(),
+                telemetry.heap_used_bytes as u64,
+                cert_config.max_heap_bytes.unwrap_or(0) as u64,
+            ),
+            0xCA07 => (
+                "max_logs_per_frame".to_string(),
+                telemetry.logs_count as u64,
+                cert_config.max_logs_per_frame.unwrap_or(0) as u64,
+            ),
+            _ => return None,
+        };
+
+        Some(DebugEvent::Cert { rule, used, limit, frame_index })
+    }
+
+    pub(crate) fn telemetry_event_from_snapshot(telemetry: TelemetryFrame) -> DebugEvent {
+        DebugEvent::Telemetry {
+            frame_index: telemetry.frame_index,
+            vm_steps: telemetry.vm_steps,
+            syscalls: telemetry.syscalls,
+            cycles: telemetry.cycles_used,
+            cycles_budget: telemetry.cycles_budget,
+            host_cpu_time_us: telemetry.host_cpu_time_us,
+            violations: telemetry.violations,
+            glyph_slots_used: telemetry.glyph_slots_used,
+            glyph_slots_total: telemetry.glyph_slots_total,
+            sound_slots_used: telemetry.sound_slots_used,
+            sound_slots_total: telemetry.sound_slots_total,
+            scene_slots_used: telemetry.scene_slots_used,
+            scene_slots_total: telemetry.scene_slots_total,
+        }
+    }
+
     /// Scans the system for new information to push to the debugger client.
     fn stream_events(&mut self, firmware: &mut Firmware) {
         if let Some(report) = firmware.os.last_crash_report.as_ref() {
@@ -251,46 +320,15 @@ impl HostDebugger {
                 });
             }
 
-            // Map Certification tags (0xCA01-0xCA03) to 'Cert' protocol events.
-            if event.tag >= 0xCA01 && event.tag <= 0xCA03 {
-                let tel = firmware.os.atomic_telemetry.snapshot();
-                let cert_config = &firmware.os.certifier.config;
-
-                let (rule, used, limit) = match event.tag {
-                    0xCA01 => (
-                        "cycles_budget".to_string(),
-                        tel.cycles_used,
-                        cert_config.cycles_budget_per_frame.unwrap_or(0),
-                    ),
-                    0xCA02 => (
-                        "max_syscalls".to_string(),
-                        tel.syscalls as u64,
-                        cert_config.max_syscalls_per_frame.unwrap_or(0) as u64,
-                    ),
-                    0xCA03 => (
-                        "max_host_cpu_us".to_string(),
-                        tel.host_cpu_time_us,
-                        cert_config.max_host_cpu_us_per_frame.unwrap_or(0),
-                    ),
-                    0xCA04 => (
-                        "max_glyph_slots_used".to_string(),
-                        tel.glyph_slots_used as u64,
-                        cert_config.max_glyph_slots_used.unwrap_or(0) as u64,
-                    ),
-                    0xCA05 => (
-                        "max_sound_slots_used".to_string(),
-                        tel.sound_slots_used as u64,
-                        cert_config.max_sound_slots_used.unwrap_or(0) as u64,
-                    ),
-                    _ => ("unknown".to_string(), 0, 0),
-                };
-
-                self.send_event(DebugEvent::Cert {
-                    rule,
-                    used,
-                    limit,
-                    frame_index: firmware.os.logical_frame_index,
-                });
+            if (0xCA01..=0xCA07).contains(&event.tag)
+                && let Some(cert_event) = Self::cert_event_from_snapshot(
+                    event.tag,
+                    firmware.os.atomic_telemetry.snapshot(),
+                    &firmware.os.certifier.config,
+                    firmware.os.logical_frame_index,
+                )
+            {
+                self.send_event(cert_event);
             }
 
             self.send_event(DebugEvent::Log {
@@ -304,19 +342,7 @@ impl HostDebugger {
         let current_frame = firmware.os.logical_frame_index;
         if current_frame > self.last_telemetry_frame {
             let tel = firmware.os.atomic_telemetry.snapshot();
-            self.send_event(DebugEvent::Telemetry {
-                frame_index: tel.frame_index,
-                vm_steps: tel.vm_steps,
-                syscalls: tel.syscalls,
-                cycles: tel.cycles_used,
-                cycles_budget: tel.cycles_budget,
-                host_cpu_time_us: tel.host_cpu_time_us,
-                violations: tel.violations,
-                glyph_slots_used: tel.glyph_slots_used,
-                glyph_slots_total: tel.glyph_slots_total,
-                sound_slots_used: tel.sound_slots_used,
-                sound_slots_total: tel.sound_slots_total,
-            });
+            self.send_event(Self::telemetry_event_from_snapshot(tel));
             self.last_telemetry_frame = current_frame;
         }
     }
diff --git a/crates/host/prometeu-host-desktop-winit/src/overlay.rs b/crates/host/prometeu-host-desktop-winit/src/overlay.rs
index f1d707a1..b55967d7 100644
--- a/crates/host/prometeu-host-desktop-winit/src/overlay.rs
+++ b/crates/host/prometeu-host-desktop-winit/src/overlay.rs
@@ -94,6 +94,7 @@ pub(crate) fn capture_snapshot(stats: &HostStats, firmware: &Firmware) -> Overla
     let heap_ratio = ratio(tel.heap_used_bytes as u64, heap_total_bytes as u64);
     let glyph_ratio = ratio(tel.glyph_slots_used as u64, tel.glyph_slots_total as u64);
     let sound_ratio = ratio(tel.sound_slots_used as u64, tel.sound_slots_total as u64);
+    let scene_ratio = ratio(tel.scene_slots_used as u64, tel.scene_slots_total as u64);
 
     OverlaySnapshot {
         rows: vec![
@@ -163,6 +164,12 @@ pub(crate) fn capture_snapshot(stats: &HostStats, firmware: &Firmware) -> Overla
                 ratio: sound_ratio,
                 warn: tel.sound_slots_total > 0 && tel.sound_slots_used >= tel.sound_slots_total,
             },
+            OverlayBar {
+                label: "SCENE",
+                value: format!("{} / {} slots", tel.scene_slots_used, tel.scene_slots_total),
+                ratio: scene_ratio,
+                warn: tel.scene_slots_total > 0 && tel.scene_slots_used >= tel.scene_slots_total,
+            },
         ],
         footer,
     }
diff --git a/crates/host/prometeu-host-desktop-winit/src/runner.rs b/crates/host/prometeu-host-desktop-winit/src/runner.rs
index cb1cd9cb..79f10c29 100644
--- a/crates/host/prometeu-host-desktop-winit/src/runner.rs
+++ b/crates/host/prometeu-host-desktop-winit/src/runner.rs
@@ -58,7 +58,8 @@ pub struct HostRunner {
 
     /// Performance metrics collector.
     stats: HostStats,
-    /// Remote debugger interface.
+    /// Remote debugger interface. It consumes host-owned telemetry and runtime state
+    /// directly instead of depending on guest-visible inspection syscalls.
     debugger: HostDebugger,
 
     /// Flag to enable/disable the technical telemetry display.
@@ -225,7 +226,8 @@ impl ApplicationHandler for HostRunner {
         // 1. Process pending debug commands from the network.
         self.debugger.check_commands(&mut self.firmware, &mut self.hardware);
 
-        // Sync inspection mode state.
+        // Sync inspection mode state. This is host-owned overlay/debugger control,
+        // not a guest-visible debug ABI switch.
         self.firmware.os.inspection_active = self.overlay_enabled || self.debugger.stream.is_some();
 
         // 2. Maintain filesystem connection if it was lost (e.g., directory removed).
@@ -307,9 +309,123 @@ mod tests {
     use super::*;
     use prometeu_firmware::BootTarget;
     use prometeu_hal::debugger_protocol::DEVTOOLS_PROTOCOL_VERSION;
+    use prometeu_hal::telemetry::{CertificationConfig, TelemetryFrame};
     use std::io::{Read, Write};
     use std::net::TcpStream;
 
+    #[test]
+    fn host_debugger_maps_cert_events_from_host_owned_sources() {
+        let telemetry = TelemetryFrame {
+            glyph_slots_used: 3,
+            heap_used_bytes: 4096,
+            logs_count: 7,
+            ..Default::default()
+        };
+        let config = CertificationConfig {
+            enabled: true,
+            max_glyph_slots_used: Some(2),
+            max_heap_bytes: Some(2048),
+            max_logs_per_frame: Some(5),
+            ..Default::default()
+        };
+
+        match HostDebugger::cert_event_from_snapshot(0xCA04, telemetry, &config, 12) {
+            Some(prometeu_hal::debugger_protocol::DebugEvent::Cert {
+                rule,
+                used,
+                limit,
+                frame_index,
+            }) => {
+                assert_eq!(rule, "max_glyph_slots_used");
+                assert_eq!(used, 3);
+                assert_eq!(limit, 2);
+                assert_eq!(frame_index, 12);
+            }
+            other => panic!("unexpected glyph cert event: {:?}", other),
+        }
+        match HostDebugger::cert_event_from_snapshot(0xCA06, telemetry, &config, 12) {
+            Some(prometeu_hal::debugger_protocol::DebugEvent::Cert {
+                rule,
+                used,
+                limit,
+                frame_index,
+            }) => {
+                assert_eq!(rule, "max_heap_bytes");
+                assert_eq!(used, 4096);
+                assert_eq!(limit, 2048);
+                assert_eq!(frame_index, 12);
+            }
+            other => panic!("unexpected heap cert event: {:?}", other),
+        }
+        match HostDebugger::cert_event_from_snapshot(0xCA07, telemetry, &config, 12) {
+            Some(prometeu_hal::debugger_protocol::DebugEvent::Cert {
+                rule,
+                used,
+                limit,
+                frame_index,
+            }) => {
+                assert_eq!(rule, "max_logs_per_frame");
+                assert_eq!(used, 7);
+                assert_eq!(limit, 5);
+                assert_eq!(frame_index, 12);
+            }
+            other => panic!("unexpected logs cert event: {:?}", other),
+        }
+    }
+
+    #[test]
+    fn host_debugger_maps_telemetry_from_atomic_snapshot_fields() {
+        let telemetry = TelemetryFrame {
+            frame_index: 8,
+            vm_steps: 123,
+            syscalls: 9,
+            cycles_used: 456,
+            cycles_budget: 789,
+            host_cpu_time_us: 321,
+            violations: 2,
+            glyph_slots_used: 1,
+            glyph_slots_total: 16,
+            sound_slots_used: 0,
+            sound_slots_total: 8,
+            scene_slots_used: 2,
+            scene_slots_total: 16,
+            ..Default::default()
+        };
+
+        match HostDebugger::telemetry_event_from_snapshot(telemetry) {
+            prometeu_hal::debugger_protocol::DebugEvent::Telemetry {
+                frame_index,
+                vm_steps,
+                syscalls,
+                cycles,
+                cycles_budget,
+                host_cpu_time_us,
+                violations,
+                glyph_slots_used,
+                glyph_slots_total,
+                sound_slots_used,
+                sound_slots_total,
+                scene_slots_used,
+                scene_slots_total,
+            } => {
+                assert_eq!(frame_index, 8);
+                assert_eq!(vm_steps, 123);
+                assert_eq!(syscalls, 9);
+                assert_eq!(cycles, 456);
+                assert_eq!(cycles_budget, 789);
+                assert_eq!(host_cpu_time_us, 321);
+                assert_eq!(violations, 2);
+                assert_eq!(glyph_slots_used, 1);
+                assert_eq!(glyph_slots_total, 16);
+                assert_eq!(sound_slots_used, 0);
+                assert_eq!(sound_slots_total, 8);
+                assert_eq!(scene_slots_used, 2);
+                assert_eq!(scene_slots_total, 16);
+            }
+            other => panic!("unexpected telemetry event: {:?}", other),
+        }
+    }
+
     #[test]
     #[ignore = "requires localhost TCP bind/connect; run via `cargo test -p prometeu-host-desktop-winit --lib -- --ignored`"]
     fn test_debug_port_opens() {
diff --git a/discussion/.backups/index.ndjson.20260419-085004.bak b/discussion/.backups/index.ndjson.20260419-085004.bak
new file mode 100644
index 00000000..0b53408d
--- /dev/null
+++ b/discussion/.backups/index.ndjson.20260419-085004.bak
@@ -0,0 +1,29 @@
+{"type":"meta","next_id":{"DSC":29,"AGD":29,"DEC":18,"PLN":33,"LSN":34,"CLSN":1}}
+{"type":"discussion","id":"DSC-0023","status":"done","ticket":"perf-full-migration-to-atomic-telemetry","title":"Agenda - [PERF] Full Migration to Atomic Telemetry","created_at":"2026-04-10","updated_at":"2026-04-10","tags":["perf","runtime","telemetry"],"agendas":[{"id":"AGD-0021","file":"workflow/agendas/AGD-0021-full-migration-to-atomic-telemetry.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}],"decisions":[{"id":"DEC-0008","file":"workflow/decisions/DEC-0008-full-migration-to-atomic-telemetry.md","status":"accepted","created_at":"2026-04-10","updated_at":"2026-04-10"}],"plans":[{"id":"PLN-0007","file":"workflow/plans/PLN-0007-full-migration-to-atomic-telemetry.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}],"lessons":[{"id":"LSN-0028","file":"lessons/DSC-0023-perf-full-migration-to-atomic-telemetry/LSN-0028-converging-to-single-atomic-telemetry-source.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
+{"type":"discussion","id":"DSC-0020","status":"done","ticket":"jenkins-gitea-integration","title":"Jenkins Gitea Integration and Relocation","created_at":"2026-04-07","updated_at":"2026-04-07","tags":["ci","jenkins","gitea"],"agendas":[{"id":"AGD-0018","file":"workflow/agendas/AGD-0018-jenkins-gitea-integration-and-relocation.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}],"decisions":[{"id":"DEC-0003","file":"workflow/decisions/DEC-0003-jenkins-gitea-strategy.md","status":"accepted","created_at":"2026-04-07","updated_at":"2026-04-07"}],"plans":[{"id":"PLN-0003","file":"workflow/plans/PLN-0003-jenkins-gitea-execution.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}],"lessons":[{"id":"LSN-0021","file":"lessons/DSC-0020-jenkins-gitea-integration/LSN-0021-jenkins-gitea-integration.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}]}
+{"type":"discussion","id":"DSC-0021","status":"done","ticket":"asset-entry-codec-enum-with-metadata","title":"Asset Entry Codec Enum Contract","created_at":"2026-04-09","updated_at":"2026-04-09","tags":["asset","runtime","codec","metadata"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0024","file":"lessons/DSC-0021-asset-entry-codec-enum-contract/LSN-0024-string-on-the-wire-enum-in-runtime.md","status":"done","created_at":"2026-04-09","updated_at":"2026-04-09"}]}
+{"type":"discussion","id":"DSC-0022","status":"done","ticket":"tile-bank-vs-glyph-bank-domain-naming","title":"Glyph Bank Domain Naming Contract","created_at":"2026-04-09","updated_at":"2026-04-10","tags":["gfx","runtime","naming","domain-model"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0025","file":"lessons/DSC-0022-glyph-bank-domain-naming/LSN-0025-rename-artifact-by-meaning-not-by-token.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
+{"type":"discussion","id":"DSC-0001","status":"done","ticket":"legacy-runtime-learn-import","title":"Import legacy runtime learn into discussion lessons","created_at":"2026-03-27","updated_at":"2026-03-27","tags":["migration","tech-debt"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0001","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0001-prometeu-learn-index.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0002","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0002-historical-asset-status-first-fault-and-return-contract.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0003","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0003-historical-audio-status-first-fault-and-return-contract.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0004","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0004-historical-cartridge-boot-protocol-and-manifest-authority.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0005","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0005-historical-game-memcard-slots-surface-and-semantics.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0006","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0006-historical-gfx-status-first-fault-and-return-contract.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0007","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0007-historical-retired-fault-and-input-decisions.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0008","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0008-historical-vm-core-and-assets.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0009","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0009-mental-model-asset-management.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0010","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0010-mental-model-audio.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0011","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0011-mental-model-gfx.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0012","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0012-mental-model-input.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0013","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0013-mental-model-observability-and-debugging.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0014","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0014-mental-model-portability-and-cross-platform.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0015","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0015-mental-model-save-memory-and-memcard.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0016","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0016-mental-model-status-first-and-fault-thinking.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0017","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0017-mental-model-time-and-cycles.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"},{"id":"LSN-0018","file":"lessons/DSC-0001-runtime-learn-legacy-import/LSN-0018-mental-model-touch.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"}]}
+{"type":"discussion","id":"DSC-0002","status":"open","ticket":"runtime-edge-test-plan","title":"Agenda - Runtime Edge Test Plan","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0001","file":"workflow/agendas/AGD-0001-runtime-edge-test-plan.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0003","status":"open","ticket":"packed-cartridge-loader-pmc","title":"Agenda - Packed Cartridge Loader PMC","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0002","file":"workflow/agendas/AGD-0002-packed-cartridge-loader-pmc.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0004","status":"open","ticket":"system-run-cart","title":"Agenda - System Run Cart","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0003","file":"workflow/agendas/AGD-0003-system-run-cart.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0005","status":"open","ticket":"system-fault-semantics-and-control-surface","title":"Agenda - System Fault Semantics and Control Surface","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0004","file":"workflow/agendas/AGD-0004-system-fault-semantics-and-control-surface.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0006","status":"open","ticket":"vm-owned-random-service","title":"Agenda - VM-Owned Random Service","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0005","file":"workflow/agendas/AGD-0005-vm-owned-random-service.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0007","status":"open","ticket":"app-home-filesystem-surface-and-semantics","title":"Agenda - App Home Filesystem Surface and Semantics","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0006","file":"workflow/agendas/AGD-0006-app-home-filesystem-surface-and-semantics.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0008","status":"done","ticket":"perf-runtime-telemetry-hot-path","title":"Agenda - [PERF] Runtime Telemetry Hot Path","created_at":"2026-03-27","updated_at":"2026-04-10","tags":[],"agendas":[{"id":"AGD-0007","file":"workflow/agendas/AGD-0007-perf-runtime-telemetry-hot-path.md","status":"done","created_at":"2026-03-27","updated_at":"2026-04-10"}],"decisions":[{"id":"DEC-0005","file":"workflow/decisions/DEC-0005-perf-push-based-telemetry-model.md","status":"accepted","created_at":"2026-04-10","updated_at":"2026-04-10"}],"plans":[{"id":"PLN-0005","file":"workflow/plans/PLN-0005-perf-push-based-telemetry-implementation.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}],"lessons":[{"id":"LSN-0026","file":"lessons/DSC-0008-perf-runtime-telemetry-hot-path/LSN-0026-push-based-telemetry-model.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
+{"type":"discussion","id":"DSC-0009","status":"open","ticket":"perf-async-background-work-lanes-for-assets-and-fs","title":"Agenda - [PERF] Async Background Work Lanes for Assets and FS","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0008","file":"workflow/agendas/AGD-0008-perf-async-background-work-lanes-for-assets-and-fs.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0010","status":"open","ticket":"perf-host-desktop-frame-pacing-and-presentation","title":"Agenda - [PERF] Host Desktop Frame Pacing and Presentation","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0009","file":"workflow/agendas/AGD-0009-perf-host-desktop-frame-pacing-and-presentation.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0011","status":"open","ticket":"perf-gfx-render-pipeline-and-dirty-regions","title":"Agenda - [PERF] GFX Render Pipeline and Dirty Regions","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0010","file":"workflow/agendas/AGD-0010-perf-gfx-render-pipeline-and-dirty-regions.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0012","status":"review","ticket":"perf-runtime-introspection-syscalls","title":"Agenda - [PERF] Runtime Introspection Syscalls","created_at":"2026-03-27","updated_at":"2026-04-19","tags":["perf","runtime","syscall","telemetry","debug","asset"],"agendas":[{"id":"AGD-0011","file":"workflow/agendas/AGD-0011-perf-runtime-introspection-syscalls.md","status":"accepted","created_at":"2026-03-27","updated_at":"2026-04-18"}],"decisions":[{"id":"DEC-0009","file":"workflow/decisions/DEC-0009-host-owned-debug-and-certification.md","status":"accepted","created_at":"2026-04-18","updated_at":"2026-04-19","ref_agenda":"AGD-0011"}],"plans":[{"id":"PLN-0030","file":"workflow/plans/PLN-0030-dec9-spec-boundary-propagation.md","status":"done","created_at":"2026-04-19","updated_at":"2026-04-19","ref_decisions":["DEC-0009"]},{"id":"PLN-0031","file":"workflow/plans/PLN-0031-dec9-runtime-bank-abi-cleanup.md","status":"done","created_at":"2026-04-19","updated_at":"2026-04-19","ref_decisions":["DEC-0009"]},{"id":"PLN-0032","file":"workflow/plans/PLN-0032-dec9-host-debugger-and-certification-alignment.md","status":"done","created_at":"2026-04-19","updated_at":"2026-04-19","ref_decisions":["DEC-0009"]}],"lessons":[]}
+{"type":"discussion","id":"DSC-0013","status":"done","ticket":"perf-host-debug-overlay-isolation","title":"Agenda - [PERF] Host Debug Overlay Isolation","created_at":"2026-03-27","updated_at":"2026-04-10","tags":[],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0027","file":"lessons/DSC-0013-perf-host-debug-overlay-isolation/LSN-0027-host-debug-overlay-isolation.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
+{"type":"discussion","id":"DSC-0024","status":"done","ticket":"generic-memory-bank-slot-contract","title":"Agenda - Generic Memory Bank Slot Contract","created_at":"2026-04-10","updated_at":"2026-04-10","tags":["runtime","asset","memory-bank","slots","host"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0029","file":"lessons/DSC-0024-generic-memory-bank-slot-contract/LSN-0029-slot-first-bank-telemetry-belongs-in-asset-manager.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
+{"type":"discussion","id":"DSC-0025","status":"done","ticket":"scene-bank-and-viewport-cache-refactor","title":"Scene Bank and Viewport Cache Refactor","created_at":"2026-04-11","updated_at":"2026-04-14","tags":["gfx","tilemap","runtime","render"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0030","file":"lessons/DSC-0025-scene-bank-and-viewport-cache-refactor/LSN-0030-canonical-scene-cache-and-resolver-split.md","status":"done","created_at":"2026-04-14","updated_at":"2026-04-14"}]}
+{"type":"discussion","id":"DSC-0026","status":"done","ticket":"render-all-scene-cache-and-camera-integration","title":"Integrate render_all with Scene Cache and Camera","created_at":"2026-04-14","updated_at":"2026-04-18","tags":["gfx","runtime","render","camera","scene"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0031","file":"lessons/DSC-0026-render-all-scene-cache-and-camera-integration/LSN-0031-frame-composition-belongs-above-the-render-backend.md","status":"done","created_at":"2026-04-18","updated_at":"2026-04-18"}]}
+{"type":"discussion","id":"DSC-0027","status":"done","ticket":"frame-composer-public-syscall-surface","title":"Agenda - FrameComposer Public Syscall Surface","created_at":"2026-04-17","updated_at":"2026-04-18","tags":["gfx","runtime","syscall","abi","frame-composer","scene","camera","sprites"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0032","file":"lessons/DSC-0027-frame-composer-public-syscall-surface/LSN-0032-public-abi-must-follow-the-canonical-service-boundary.md","status":"done","created_at":"2026-04-18","updated_at":"2026-04-18"}]}
+{"type":"discussion","id":"DSC-0028","status":"done","ticket":"deferred-overlay-and-primitive-composition","title":"Deferred Overlay and Primitive Composition over FrameComposer","created_at":"2026-04-18","updated_at":"2026-04-18","tags":["gfx","runtime","render","frame-composer","overlay","primitives","hud"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0033","file":"lessons/DSC-0028-deferred-overlay-and-primitive-composition/LSN-0033-debug-primitives-should-be-a-final-overlay-not-part-of-game-composition.md","status":"done","created_at":"2026-04-18","updated_at":"2026-04-18"}]}
+{"type":"discussion","id":"DSC-0014","status":"open","ticket":"perf-vm-allocation-and-copy-pressure","title":"Agenda - [PERF] VM Allocation and Copy Pressure","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0013","file":"workflow/agendas/AGD-0013-perf-vm-allocation-and-copy-pressure.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0015","status":"open","ticket":"perf-cartridge-boot-and-program-ownership","title":"Agenda - [PERF] Cartridge Boot and Program Ownership","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0014","file":"workflow/agendas/AGD-0014-perf-cartridge-boot-and-program-ownership.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0016","status":"done","ticket":"tilemap-empty-cell-vs-tile-id-zero","title":"Tilemap Empty Cell vs Tile ID Zero","created_at":"2026-03-27","updated_at":"2026-04-09","tags":[],"agendas":[{"id":"AGD-0015","file":"workflow/agendas/AGD-0015-tilemap-empty-cell-vs-tile-id-zero.md","status":"done","created_at":"2026-03-27","updated_at":"2026-04-09"}],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0022","file":"lessons/DSC-0016-tilemap-empty-cell-semantics/LSN-0022-tilemap-empty-cell-convergence.md","status":"done","created_at":"2026-04-09","updated_at":"2026-04-09"}]}
+{"type":"discussion","id":"DSC-0017","status":"done","ticket":"asset-entry-metadata-normalization-contract","title":"Asset Entry Metadata Normalization Contract","created_at":"2026-03-27","updated_at":"2026-04-09","tags":[],"agendas":[{"id":"AGD-0016","file":"workflow/agendas/AGD-0016-asset-entry-metadata-normalization-contract.md","status":"done","created_at":"2026-03-27","updated_at":"2026-04-09"}],"decisions":[{"id":"DEC-0004","file":"workflow/decisions/DEC-0004-asset-entry-metadata-normalization-contract.md","status":"accepted","created_at":"2026-04-09","updated_at":"2026-04-09"}],"plans":[],"lessons":[{"id":"LSN-0023","file":"lessons/DSC-0017-asset-metadata-normalization/LSN-0023-typed-asset-metadata-helpers.md","status":"done","created_at":"2026-04-09","updated_at":"2026-04-09"}]}
+{"type":"discussion","id":"DSC-0018","status":"done","ticket":"asset-load-asset-id-int-contract","title":"Asset Load Asset ID Int Contract","created_at":"2026-03-27","updated_at":"2026-03-27","tags":["asset","runtime","abi"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0019","file":"lessons/DSC-0018-asset-load-asset-id-int-contract/LSN-0019-asset-load-id-abi-convergence.md","status":"done","created_at":"2026-03-27","updated_at":"2026-03-27"}]}
+{"type":"discussion","id":"DSC-0019","status":"done","ticket":"jenkinsfile-correction","title":"Jenkinsfile Correction and Relocation","created_at":"2026-04-07","updated_at":"2026-04-07","tags":["ci","jenkins"],"agendas":[{"id":"AGD-0017","file":"workflow/agendas/AGD-0017-jenkinsfile-correction.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}],"decisions":[{"id":"DEC-0002","file":"workflow/decisions/DEC-0002-jenkinsfile-strategy.md","status":"accepted","created_at":"2026-04-07","updated_at":"2026-04-07"}],"plans":[{"id":"PLN-0002","file":"workflow/plans/PLN-0002-jenkinsfile-execution.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}],"lessons":[{"id":"LSN-0020","file":"lessons/DSC-0019-jenkins-ci-standardization/LSN-0020-jenkins-standard-relocation.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}]}
diff --git a/discussion/index.ndjson b/discussion/index.ndjson
index 6c1c7a0d..d86c5efc 100644
--- a/discussion/index.ndjson
+++ b/discussion/index.ndjson
@@ -1,4 +1,4 @@
-{"type":"meta","next_id":{"DSC":29,"AGD":29,"DEC":17,"PLN":30,"LSN":34,"CLSN":1}}
+{"type":"meta","next_id":{"DSC":29,"AGD":29,"DEC":18,"PLN":33,"LSN":35,"CLSN":1}}
 {"type":"discussion","id":"DSC-0023","status":"done","ticket":"perf-full-migration-to-atomic-telemetry","title":"Agenda - [PERF] Full Migration to Atomic Telemetry","created_at":"2026-04-10","updated_at":"2026-04-10","tags":["perf","runtime","telemetry"],"agendas":[{"id":"AGD-0021","file":"workflow/agendas/AGD-0021-full-migration-to-atomic-telemetry.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}],"decisions":[{"id":"DEC-0008","file":"workflow/decisions/DEC-0008-full-migration-to-atomic-telemetry.md","status":"accepted","created_at":"2026-04-10","updated_at":"2026-04-10"}],"plans":[{"id":"PLN-0007","file":"workflow/plans/PLN-0007-full-migration-to-atomic-telemetry.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}],"lessons":[{"id":"LSN-0028","file":"lessons/DSC-0023-perf-full-migration-to-atomic-telemetry/LSN-0028-converging-to-single-atomic-telemetry-source.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
 {"type":"discussion","id":"DSC-0020","status":"done","ticket":"jenkins-gitea-integration","title":"Jenkins Gitea Integration and Relocation","created_at":"2026-04-07","updated_at":"2026-04-07","tags":["ci","jenkins","gitea"],"agendas":[{"id":"AGD-0018","file":"workflow/agendas/AGD-0018-jenkins-gitea-integration-and-relocation.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}],"decisions":[{"id":"DEC-0003","file":"workflow/decisions/DEC-0003-jenkins-gitea-strategy.md","status":"accepted","created_at":"2026-04-07","updated_at":"2026-04-07"}],"plans":[{"id":"PLN-0003","file":"workflow/plans/PLN-0003-jenkins-gitea-execution.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}],"lessons":[{"id":"LSN-0021","file":"lessons/DSC-0020-jenkins-gitea-integration/LSN-0021-jenkins-gitea-integration.md","status":"done","created_at":"2026-04-07","updated_at":"2026-04-07"}]}
 {"type":"discussion","id":"DSC-0021","status":"done","ticket":"asset-entry-codec-enum-with-metadata","title":"Asset Entry Codec Enum Contract","created_at":"2026-04-09","updated_at":"2026-04-09","tags":["asset","runtime","codec","metadata"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0024","file":"lessons/DSC-0021-asset-entry-codec-enum-contract/LSN-0024-string-on-the-wire-enum-in-runtime.md","status":"done","created_at":"2026-04-09","updated_at":"2026-04-09"}]}
@@ -14,7 +14,7 @@
 {"type":"discussion","id":"DSC-0009","status":"open","ticket":"perf-async-background-work-lanes-for-assets-and-fs","title":"Agenda - [PERF] Async Background Work Lanes for Assets and FS","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0008","file":"workflow/agendas/AGD-0008-perf-async-background-work-lanes-for-assets-and-fs.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
 {"type":"discussion","id":"DSC-0010","status":"open","ticket":"perf-host-desktop-frame-pacing-and-presentation","title":"Agenda - [PERF] Host Desktop Frame Pacing and Presentation","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0009","file":"workflow/agendas/AGD-0009-perf-host-desktop-frame-pacing-and-presentation.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
 {"type":"discussion","id":"DSC-0011","status":"open","ticket":"perf-gfx-render-pipeline-and-dirty-regions","title":"Agenda - [PERF] GFX Render Pipeline and Dirty Regions","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0010","file":"workflow/agendas/AGD-0010-perf-gfx-render-pipeline-and-dirty-regions.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
-{"type":"discussion","id":"DSC-0012","status":"open","ticket":"perf-runtime-introspection-syscalls","title":"Agenda - [PERF] Runtime Introspection Syscalls","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0011","file":"workflow/agendas/AGD-0011-perf-runtime-introspection-syscalls.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"lessons":[]}
+{"type":"discussion","id":"DSC-0012","status":"done","ticket":"perf-runtime-introspection-syscalls","title":"Agenda - [PERF] Runtime Introspection Syscalls","created_at":"2026-03-27","updated_at":"2026-04-19","tags":["perf","runtime","syscall","telemetry","debug","asset"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0034","file":"lessons/DSC-0012-perf-runtime-introspection-syscalls/LSN-0034-host-owned-debug-boundaries.md","status":"done","created_at":"2026-04-19","updated_at":"2026-04-19"}]}
 {"type":"discussion","id":"DSC-0013","status":"done","ticket":"perf-host-debug-overlay-isolation","title":"Agenda - [PERF] Host Debug Overlay Isolation","created_at":"2026-03-27","updated_at":"2026-04-10","tags":[],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0027","file":"lessons/DSC-0013-perf-host-debug-overlay-isolation/LSN-0027-host-debug-overlay-isolation.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
 {"type":"discussion","id":"DSC-0024","status":"done","ticket":"generic-memory-bank-slot-contract","title":"Agenda - Generic Memory Bank Slot Contract","created_at":"2026-04-10","updated_at":"2026-04-10","tags":["runtime","asset","memory-bank","slots","host"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0029","file":"lessons/DSC-0024-generic-memory-bank-slot-contract/LSN-0029-slot-first-bank-telemetry-belongs-in-asset-manager.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}]}
 {"type":"discussion","id":"DSC-0025","status":"done","ticket":"scene-bank-and-viewport-cache-refactor","title":"Scene Bank and Viewport Cache Refactor","created_at":"2026-04-11","updated_at":"2026-04-14","tags":["gfx","tilemap","runtime","render"],"agendas":[],"decisions":[],"plans":[],"lessons":[{"id":"LSN-0030","file":"lessons/DSC-0025-scene-bank-and-viewport-cache-refactor/LSN-0030-canonical-scene-cache-and-resolver-split.md","status":"done","created_at":"2026-04-14","updated_at":"2026-04-14"}]}
diff --git a/discussion/lessons/DSC-0012-perf-runtime-introspection-syscalls/LSN-0034-host-owned-debug-boundaries.md b/discussion/lessons/DSC-0012-perf-runtime-introspection-syscalls/LSN-0034-host-owned-debug-boundaries.md
new file mode 100644
index 00000000..8234b304
--- /dev/null
+++ b/discussion/lessons/DSC-0012-perf-runtime-introspection-syscalls/LSN-0034-host-owned-debug-boundaries.md
@@ -0,0 +1,55 @@
+---
+id: LSN-0034
+ticket: perf-runtime-introspection-syscalls
+title: Host-Owned Debug Boundaries and Cheap Machine Diagnostics
+created: 2026-04-19
+tags: [runtime, host, debug, certification, telemetry, abi]
+---
+
+## Context
+
+`DSC-0012` resolved a recurring ambiguity in PROMETEU: whether development diagnostics should be treated as part of the guest/runtime contract or as host tooling concerns. The codebase already had host overlay rendering, atomic telemetry snapshots, and slot-first bank telemetry, but the runtime still exposed JSON-formatted bank inspection syscalls.
+
+The completed work converged specs, runtime ABI, and host debugger behavior around a single boundary: rich diagnostics belong to the host, while the runtime exports only bounded machine-facing summaries.
+
+## Key Decisions
+
+### Host-Owned Debug and Certification (`DEC-0009`)
+
+**What:**
+Debug tooling and certification are host-owned concerns. Guest-visible debug convenience APIs are not part of the long-term runtime ABI.
+
+**Why:**
+Development inspection, profiling, and certification analysis happen on desktop host environments, not on production handheld/runtime targets. Keeping those concerns in the guest ABI forces production execution to carry tooling-oriented surface area and cost.
+
+**Trade-offs:**
+The runtime gives up general introspection syscalls, so host tooling must consume telemetry and internal host/runtime integration points directly. In exchange, the public ABI becomes cheaper, narrower, and easier to reason about.
+
+## Patterns and Algorithms
+
+- Treat diagnostics as a layered boundary:
+  The runtime owns deterministic counters, bounded summaries, and machine-facing operational signals.
+  The host owns rendering, protocol projection, certification output, and rich inspection UX.
+
+- Prefer cheap structured values over textual debug payloads:
+  If a machine-facing diagnostic survives, it should return small canonical stack values such as `(used_slots, total_slots)`, not JSON blobs.
+
+- Use one telemetry source for all host consumers:
+  Atomic telemetry snapshots should feed debugger streaming, overlays, and certification evaluation so the platform does not fork multiple diagnostic pipelines.
+
+- Keep telemetry slot-first when the real machine contract is slot-first:
+  Bank occupancy was correctly modeled as slot usage, so the surviving public summary stayed aligned with that semantic model instead of byte-oriented totals or slot-detail dumps.
+
+## Pitfalls
+
+- Do not let host-only needs backdoor themselves into the guest ABI as "temporary" debug syscalls. They tend to linger and become accidental contract.
+
+- Do not use JSON-on-the-wire as a fallback ABI for runtime inspection. It is easy to add, but it creates unbounded cost and weakens the canonical machine model.
+
+- Do not update only specs or only code. This boundary needed spec propagation, runtime ABI cleanup, and host debugger alignment together to avoid split-brain behavior.
+
+## Takeaways
+
+- Debug and certification pipelines should be modeled as host products that consume runtime telemetry, not as guest features.
+- Surviving machine diagnostics must be justified by operational need and expressed as bounded structured values.
+- The clean boundary is: runtime produces telemetry, host interprets and presents it.
diff --git a/discussion/workflow/agendas/AGD-0011-perf-runtime-introspection-syscalls.md b/discussion/workflow/agendas/AGD-0011-perf-runtime-introspection-syscalls.md
deleted file mode 100644
index ab1e508c..00000000
--- a/discussion/workflow/agendas/AGD-0011-perf-runtime-introspection-syscalls.md
+++ /dev/null
@@ -1,72 +0,0 @@
----
-id: AGD-0011
-ticket: perf-runtime-introspection-syscalls
-title: Agenda - [PERF] Runtime Introspection Syscalls
-status: open
-created: 2026-03-27
-resolved:
-decision:
-tags: []
----
-
-# Agenda - [PERF] Runtime Introspection Syscalls
-
-## Problema
-
-As syscalls de introspecao ainda carregam custo de serializacao e agregacao demais para algo que deveria ser observabilidade sob demanda.
-
-Hoje `BankInfo` e `BankSlotInfo` montam JSON por chamada e puxam dados potencialmente caros do asset manager.
-
-## Dor
-
-- tooling de debug pode contaminar custo percebido da runtime surface.
-- serializacao de string/JSON vira alocacao no meio do dispatch.
-- sem fronteira clara, apps podem abusar de syscalls de introspecao como se fossem baratas.
-
-## Hotspots Atuais
-
-- [dispatch.rs](/Users/niltonconstantino/personal/workspace.personal/intrepid/prometeu/runtime/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs#L481)
-- [asset.rs](/Users/niltonconstantino/personal/workspace.personal/intrepid/prometeu/runtime/crates/console/prometeu-drivers/src/asset.rs#L618)
-
-## Alvo da Discussao
-
-Separar claramente custo de introspecao/debug do custo da superficie operacional normal.
-
-## O Que Precisa Ser Definido
-
-1. Papel dessas syscalls.
-   Decidir se `BankInfo`/`BankSlotInfo` sao:
-   - superficie publica normal;
-   - superficie de debug;
-   - superficie host/devtools apenas.
-
-2. Shape de retorno.
-   Definir se JSON continua existindo ou se v1 exige shape mais barato/canonico.
-
-3. Caching.
-   Delimitar se snapshots de introspecao podem ser cacheados por frame.
-
-4. Limites de uso.
-   Decidir se o runtime deve impor throttling, budget ou feature gate de debug.
-
-## Open Questions de Arquitetura
-
-1. Vale manter JSON na ABI do guest ou isso deveria ficar restrito ao host/debugger?
-2. Existe um subconjunto de dados numericos suficiente para carts sem tooling externo?
-3. O certifier deve observar essas chamadas como custo anormal de debug?
-
-## Dependencias
-
-- `../specs/10-debug-inspection-and-profiling.md`
-- `../specs/15-asset-management.md`
-- `../specs/16-host-abi-and-syscalls.md`
-- `../specs/16a-syscall-policies.md`
-
-## Criterio de Saida Desta Agenda
-
-Pode virar PR quando houver decisao escrita sobre:
-
-- papel normativo de `BankInfo`/`BankSlotInfo`;
-- permanencia ou remocao de JSON como shape de retorno;
-- politica de cache/throttling;
-- custo aceitavel de introspecao no dispatch.
diff --git a/docs/specs/runtime/09-events-and-concurrency.md b/docs/specs/runtime/09-events-and-concurrency.md
index bfba647f..200ad704 100644
--- a/docs/specs/runtime/09-events-and-concurrency.md
+++ b/docs/specs/runtime/09-events-and-concurrency.md
@@ -98,7 +98,7 @@ Important properties:
 
 - events are processed at known points;
 - no execution occurs outside the frame loop;
-- frame structure remains observable for tooling and certification.
+- frame structure remains observable for host tooling and host-owned certification.
 
 ## 7 Determinism and Best Practices
 
diff --git a/docs/specs/runtime/10-debug-inspection-and-profiling.md b/docs/specs/runtime/10-debug-inspection-and-profiling.md
index 50db8446..4f140f23 100644
--- a/docs/specs/runtime/10-debug-inspection-and-profiling.md
+++ b/docs/specs/runtime/10-debug-inspection-and-profiling.md
@@ -7,19 +7,18 @@ Didactic companion: [`../learn/mental-model-observability-and-debugging.md`](../
 
 ## 1 Scope
 
-This chapter defines the machine-visible debugging, inspection, and profiling surface of PROMETEU.
+This chapter defines the machine-visible diagnostics and profiling surface of PROMETEU after `DEC-0009`.
+
+`DEC-0009` locks debug tooling and certification output as host-owned concerns. The runtime machine contract therefore exposes only bounded operational diagnostics and deterministic telemetry production, not a general-purpose guest-visible debug surface.
 
 It covers:
 
-- execution modes;
-- pause and stepping;
-- state inspection;
-- graphics inspection;
+- runtime-visible execution control used by host tooling;
+- bounded operational telemetry;
 - profiling;
-- breakpoints and watchpoints;
 - event and fault visibility;
-- certification-facing diagnostics;
-- Host-side debug overlay (HUD) isolation.
+- certification input data;
+- host-side debug overlay (HUD) isolation.
 
 ## 2 Execution Modes
 
@@ -34,18 +33,18 @@ PROMETEU operates in three main modes:
 ### 2.2 Debug Mode
 
 - controlled execution
-- access to internal state
+- host-mediated access to internal state
 - pauses and stepping
 
 ### 2.3 Certification Mode
 
 - deterministic execution
 - collected metrics
-- report generation
+- host-generated report output
 
 No mode alters the logical result of the program.
 
-## 3 Execution Debug
+## 3 Execution Control
 
 ### 3.1 Pause and Resume
 
@@ -64,24 +63,26 @@ During pause:
 
 ### 3.2 Step-by-Step
 
-PROMETEU allows stepping at different levels:
+PROMETEU allows host tooling to step execution at different levels:
 
 - **by frame**
 - **by function**
 - **by VM instruction**
 
-Stepping by instruction reveals:
+When the host activates instruction-level inspection, it may observe:
 
 - Program Counter (PC)
 - current instruction
 - operand stack
 - call stack
 
-## 4 State Inspection
+## 4 State Inspection Boundary
+
+Detailed state inspection is a host-owned concern. The runtime may expose deterministic machine state to host tooling, but this chapter does not define a general guest ABI for introspection convenience.
 
 ### 4.1 Stacks
 
-PROMETEU allows inspecting:
+Host tooling may inspect:
 
 - **Operand Stack**
 - **Call Stack**
@@ -94,7 +95,7 @@ For each frame:
 
 ### 4.2 Heap
 
-The heap can be inspected in real time:
+The host may inspect heap state in real time:
 
 - total size
 - current usage
@@ -109,22 +110,22 @@ The programmer can observe:
 
 ### 4.3 Global Space
 
-Global variables:
+Host-owned inspection may observe global variables, including:
 
 - current values
 - references
 - initialization
 
-## 5 Graphics Debug
+## 5 Graphics Inspection Boundary
 
-PROMETEU allows inspecting the graphics system:
+Host tooling may inspect the graphics system:
 
 - front buffer
 - back buffer
 - palette state
 - active sprites
 
-It is possible to:
+The host may:
 
 - freeze the image
 - observe buffers separately
@@ -153,7 +154,7 @@ SYSTEM:612
 
 ### 6.2 Per-Function Profiling
 
-PROMETEU can associate cycles with:
+Host tooling may associate cycles with:
 
 - functions
 - methods
@@ -161,7 +162,7 @@ PROMETEU can associate cycles with:
 
 ### 6.3 Per-Instruction Profiling
 
-At the lowest level, the system can display:
+At the lowest level, host tooling can display:
 
 - executed instructions
 - individual cost
@@ -185,13 +186,13 @@ Peak:34KB❌
 Limit:32KB
 ```
 
-These data directly feed the certification.
+These data feed host-owned certification.
 
 ### 7.1 Bank Occupancy Profiling
 
 Bank occupancy diagnostics are slot-first.
 
-The visible per-bank telemetry used by host inspection surfaces and certification is:
+The visible per-bank telemetry used by host inspection surfaces and host-owned certification is:
 
 - `bank_type`
 - `used_slots`
@@ -206,9 +207,11 @@ Byte-oriented bank occupancy is not the canonical visible profiling contract.
 
 ## 8 Breakpoints and Watchpoints
 
+Breakpoints and watchpoints are host-mediated tooling controls. They are not part of the gameplay-facing cartridge contract.
+
 ### 8.1 Breakpoints
 
-PROMETEU supports breakpoints in:
+The platform supports host-owned breakpoints in:
 
 - specific frames
 - functions
@@ -222,7 +225,7 @@ Breakpoints:
 
 ### 8.2 Watchpoints
 
-Watchpoints monitor:
+Host tooling may monitor watchpoints over:
 
 - variables
 - heap addresses
@@ -233,10 +236,14 @@ Execution can pause when:
 - a value changes
 - a limit is exceeded
 
-## 9 Event and Fault Debugging
+## 9 Event and Fault Diagnostics
 
 ## 10 Certification Diagnostics
 
+Certification diagnostics are produced by the host from deterministic runtime telemetry.
+
+The runtime does not generate the final certification artifact. It only maintains the machine-facing counters and summaries required for host-owned certification.
+
 Certification diagnostics may enforce bank occupancy ceilings.
 
 For bank residency, certification uses slot-based limits, such as:
@@ -246,7 +253,7 @@ For bank residency, certification uses slot-based limits, such as:
 
 Bank certification MUST NOT depend on `max_gfx_bytes` or `max_audio_bytes`.
 
-PROMETEU allows observing:
+Host tooling may observe:
 
 - event queue
 - active timers
@@ -259,7 +266,7 @@ Each event has:
 - cost
 - consequence
 
-## 10 Host-Side Debug Overlay (HUD) Isolation
+## 11 Host-Side Debug Overlay (HUD) Isolation
 
 The visual Debug Overlay (HUD) for technical inspection is not part of the emulated machine pipeline.
 
@@ -270,7 +277,7 @@ The visual Debug Overlay (HUD) for technical inspection is not part of the emula
 3. **Host overlay module:** The Desktop Host owns a dedicated overlay module that performs host-side text, panel, and simple bar composition.
 4. **Composition boundary:** The overlay is composed on the Host presentation surface after the emulated frame is ready. Overlay pixels must not be written back into the emulated framebuffer.
 5. **Host control:** Overlay visibility and presentation policy remain under Host control.
-2. **Host (Desktop):** Responsible for collecting telemetry from the runtime and rendering the HUD as a native, transparent layer.
+6. **Host (Desktop):** Responsible for collecting telemetry from the runtime and rendering the HUD as a native, transparent layer.
 
 ### 10.2 Principles
 
@@ -287,11 +294,11 @@ To ensure zero-impact synchronization between the VM and the Host Debug Overlay,
 3. **Single Source of Truth:** This model is the exclusive source of truth for both real-time inspection and frame-end certification, replacing legacy per-frame buffered fields.
 4. **Frame-Closed Log Metric:** `logs_count` in the snapshot represents the number of logs emitted in the last completed logical frame, not a transient in-flight counter.
 
-## 11 Integration with CAP and Certification
+## 12 Integration with CAP and Certification
 
-All debug and profiling data:
+All machine diagnostics and profiling data:
 
-- feed the certification report
-- are collected deterministically
-- do not depend on external tools
+- feed the host-owned certification report;
+- are collected deterministically;
+- do not require a guest-visible debug ABI;
 - are consistent regardless of whether the Host HUD is active or not.
diff --git a/docs/specs/runtime/11-portability-and-cross-platform-execution.md b/docs/specs/runtime/11-portability-and-cross-platform-execution.md
index e745eef9..dac986f4 100644
--- a/docs/specs/runtime/11-portability-and-cross-platform-execution.md
+++ b/docs/specs/runtime/11-portability-and-cross-platform-execution.md
@@ -162,7 +162,7 @@ Without changing semantics.
 
 ## 11 Certification and Portability
 
-The **PROMETEU Certification** is valid for all platforms.
+The host-owned **PROMETEU Certification** is valid for all platforms.
 
 If a cartridge:
 
diff --git a/docs/specs/runtime/15-asset-management.md b/docs/specs/runtime/15-asset-management.md
index 90c56683..9de63331 100644
--- a/docs/specs/runtime/15-asset-management.md
+++ b/docs/specs/runtime/15-asset-management.md
@@ -110,44 +110,44 @@ This table describes content identity and storage layout, not live residency.
 
 ### 4.1 `TILES` asset contract in v1
 
-Para `BankType::TILES`, o contrato v1 voltado para o runtime é:
+For `BankType::TILES`, the v1 runtime-facing contract is:
 
 - `codec = NONE`
-- pixels serializados usam índices de paleta `u4` empacotados
-- paletas serializadas usam `RGB565` (`u16`, little-endian)
+- serialized pixels use packed `u4` palette indices
+- serialized palettes use `RGB565` (`u16`, little-endian)
 - `palette_count = 64`
-- a materialização em runtime pode expandir índices de pixel para um `u8` por pixel
+- runtime materialization may expand pixel indices to one `u8` per pixel
 
-`NONE` para `TILES` significa que não há camada de codec genérica adicional além do próprio contrato do banco.
+For `TILES`, `NONE` means there is no additional generic codec layer beyond the bank contract itself.
 
-Para a janela de transição atual:
+For the current transition window:
 
-- `RAW` é um alias legado e depreciado de `NONE`
-- novos materiais publicados devem usar `NONE` como valor canônico
+- `RAW` is a legacy deprecated alias of `NONE`
+- newly published material must use `NONE` as the canonical value
 
-Mesmo com `codec = NONE`, `TILES` ainda requer decode específico de banco a partir de seu payload serializado. O layout de bytes serializados não precisa, portanto, ser idêntico ao layout em memória.
+Even with `codec = NONE`, `TILES` still requires bank-specific decode from its serialized payload. The serialized byte layout therefore does not need to match the in-memory layout.
 
 #### 4.1.1 Metadata Normalization
 
-Seguindo a `DEC-0004`, o campo `AssetEntry.metadata` deve ser estruturado de forma segmentada para evitar ambiguidades.
+Following `DEC-0004`, the `AssetEntry.metadata` field must be structured in segmented form to avoid ambiguity.
 
-Campos de metadados obrigatórios (efetivos) para `TILES` no nível raiz:
+Required effective metadata fields for `TILES` at the root level:
 
-- `tile_size`: aresta do tile em pixels; valores válidos são `8`, `16`, ou `32`
-- `width`: largura total da folha do banco em pixels
-- `height`: altura total da folha do banco em pixels
-- `palette_count`: número de paletas serializadas para o banco
+- `tile_size`: tile edge in pixels; valid values are `8`, `16`, or `32`
+- `width`: total sheet width in pixels
+- `height`: total sheet height in pixels
+- `palette_count`: number of serialized palettes for the bank
 
-Subárvores opcionais e informativas:
+Optional informative subtrees:
 
-- `metadata.codec`: Configuração específica do codec/compressor (ex: dicionários, flags de compressão).
-- `metadata.pipeline`: Metadados informativos do processo de build do Studio (ex: source hashes, timestamps, tool versions).
+- `metadata.codec`: codec/compressor-specific configuration (for example dictionaries or compression flags).
+- `metadata.pipeline`: informative metadata from the Studio build process (for example source hashes, timestamps, or tool versions).
 
-Regras de validação para `TILES` v1:
+Validation rules for `TILES` v1:
 
-- `palette_count` deve ser `64`
-- `width * height` define o número de pixels indexados lógicos na folha decodificada
-- metadados adicionais podem existir, mas o contrato do runtime não deve depender deles para reconstruir o banco em memória (exceto se definidos na raiz como campos efetivos).
+- `palette_count` must be `64`
+- `width * height` defines the number of logical indexed pixels in the decoded sheet
+- extra metadata may exist, but the runtime contract must not depend on it to reconstruct the in-memory bank unless that data is defined at the root as an effective field.
 
 #### 4.1.2 Payload Layout
 
@@ -202,7 +202,8 @@ Rules:
 
 - the visible contract MUST NOT expose byte-oriented bank occupancy as the canonical summary;
 - canonical bank names are `GLYPH` and `SOUNDS`;
-- detailed occupancy inspection remains slot-based through slot references, not bank byte totals;
+- detailed occupancy inspection remains host-owned and slot-based through slot references, not bank byte totals;
+- public runtime specs MUST NOT treat `bank.slot_info` or JSON bank inspection payloads as the long-term guest ABI after `DEC-0009`;
 - any residual byte accounting MAY exist internally, but it is not part of the visible bank telemetry contract.
 
 ## 6 Load Lifecycle
@@ -255,9 +256,9 @@ Therefore:
 - shutting down a cartridge can release bank residency independently of VM heap behavior.
 - the runtime must not keep the full `assets.pa` payload resident in RAM as a baseline requirement.
 
-## 8 Bank Telemetry
+## 8 Bank Telemetry and Inspection Boundary
 
-The runtime surfaces bank and slot statistics such as:
+The runtime may maintain bank and slot statistics such as:
 
 - total bytes;
 - used bytes;
@@ -266,7 +267,11 @@ The runtime surfaces bank and slot statistics such as:
 - slot occupancy;
 - resident asset identity per slot.
 
-These metrics support debugging, telemetry, and certification-oriented inspection.
+These metrics support host-owned debugging, telemetry, and certification-oriented inspection.
+
+Only bounded operational summaries belong to the public runtime contract.
+
+Detailed per-slot inspection is valid for host tooling and runtime internals, but it must not be treated as a general guest-visible debug convenience API.
 
 ## 9 Preload
 
diff --git a/docs/specs/runtime/16-host-abi-and-syscalls.md b/docs/specs/runtime/16-host-abi-and-syscalls.md
index 0e2b4c1b..77d66115 100644
--- a/docs/specs/runtime/16-host-abi-and-syscalls.md
+++ b/docs/specs/runtime/16-host-abi-and-syscalls.md
@@ -15,6 +15,8 @@ It focuses on:
 
 Operational policies such as capabilities, fault classes, determinism, GC interaction, budgeting, and blocking are split into a companion chapter.
 
+Per `DEC-0009`, debug tooling and certification are host-owned concerns. This chapter therefore excludes general-purpose guest-visible debug syscalls from the canonical public ABI.
+
 ## 1 Design Principles
 
 The syscall ABI follows these rules:
@@ -199,6 +201,16 @@ For `asset.load`:
 - `slot` is the target slot index;
 - bank kind is resolved from `asset_table` by `asset_id`, not supplied by the caller.
 
+### Bank diagnostics surface (`bank`, v1)
+
+`DEC-0009` narrows the public bank contract:
+
+- `bank.info(bank_type) -> (used_slots, total_slots)` is the only surviving public bank diagnostic shape in v1;
+- `bank.info` exists only as a cheap deterministic operational summary aligned with the slot-first bank telemetry contract from [`15-asset-management.md`](15-asset-management.md);
+- `bank.slot_info` is host/debug tooling surface and is not part of the canonical public guest ABI;
+- JSON-on-the-wire bank inspection payloads are not valid public ABI;
+- `bank.info` returns stack values, not textual structured payloads.
+
 ### Composition surface (`composer`, v1)
 
 The canonical frame-orchestration public ABI uses module `composer`.
diff --git a/docs/specs/runtime/16a-syscall-policies.md b/docs/specs/runtime/16a-syscall-policies.md
index fb940b1f..1efb10ef 100644
--- a/docs/specs/runtime/16a-syscall-policies.md
+++ b/docs/specs/runtime/16a-syscall-policies.md
@@ -9,6 +9,8 @@ It complements [`16-host-abi-and-syscalls.md`](16-host-abi-and-syscalls.md), whi
 
 Unless a domain chapter explicitly narrows behavior further, this chapter is the transversal policy for all syscalls in v1.
 
+Per `DEC-0009`, guest-visible syscalls must not exist merely for debug convenience or certification plumbing. Those concerns belong to host-owned tooling.
+
 ## 1 Error Model: Faults vs Status Returns
 
 Syscalls use a status-first hybrid model.
@@ -61,6 +63,7 @@ Practical rule:
 
 - `void` is allowed only for operations whose non-fault path is effectively unconditional success;
 - any operation with a meaningful operational non-success outcome must surface that outcome through `status`, not through absence of return values.
+- debug-only or certification-only convenience calls are not justified public ABI even if they could be given a valid return shape.
 
 ### No-op policy
 
@@ -77,6 +80,14 @@ This means operational problems must not be reclassified as:
 - `Trap`, when the failure is not structural;
 - `Panic`, when the failure is not an internal invariant break.
 
+### Diagnostics boundary
+
+These policy constraints also apply to observability surfaces:
+
+- host-owned inspection and certification consumers may use runtime telemetry and internal host/runtime integration paths;
+- guest-visible syscalls must be justified by machine-facing operational needs, not by tooling convenience;
+- textual JSON diagnostics are not valid long-term public syscall ABI.
+
 ## 2 Capability System
 
 Each syscall requires a declared capability.
@@ -141,7 +152,7 @@ The system may account for:
 - cycles spent in syscalls;
 - allocations triggered by syscalls.
 
-This keeps host interaction visible in certification, telemetry, and profiling.
+This keeps host interaction visible in host-owned certification, telemetry, and profiling.
 
 ## 6 Blocking and Long Operations