diff --git a/crates/console/prometeu-hal/src/log/log_service.rs b/crates/console/prometeu-hal/src/log/log_service.rs
index b5620f65..c796b63a 100644
--- a/crates/console/prometeu-hal/src/log/log_service.rs
+++ b/crates/console/prometeu-hal/src/log/log_service.rs
@@ -1,16 +1,23 @@
 use crate::log::{LogEvent, LogLevel, LogSource};
 use std::collections::VecDeque;
+use std::sync::atomic::{AtomicU32, Ordering};
+use std::sync::Arc;
 
 pub struct LogService {
     events: VecDeque<LogEvent>,
     capacity: usize,
     next_seq: u64,
-    pub logs_count: u32,
+    pub logs_count: Arc<AtomicU32>,
 }
 
 impl LogService {
     pub fn new(capacity: usize) -> Self {
-        Self { events: VecDeque::with_capacity(capacity), capacity, next_seq: 0, logs_count: 0 }
+        Self {
+            events: VecDeque::with_capacity(capacity),
+            capacity,
+            next_seq: 0,
+            logs_count: Arc::new(AtomicU32::new(0)),
+        }
     }
 
     pub fn log(
@@ -35,11 +42,11 @@ impl LogService {
             msg,
         });
         self.next_seq += 1;
-        self.logs_count += 1;
+        self.logs_count.fetch_add(1, Ordering::Relaxed);
     }
 
     pub fn reset_count(&mut self) {
-        self.logs_count = 0;
+        self.logs_count.store(0, Ordering::Relaxed);
     }
 
     pub fn get_recent(&self, n: usize) -> Vec<LogEvent> {
diff --git a/crates/console/prometeu-hal/src/telemetry.rs b/crates/console/prometeu-hal/src/telemetry.rs
index c061e98d..08d025bb 100644
--- a/crates/console/prometeu-hal/src/telemetry.rs
+++ b/crates/console/prometeu-hal/src/telemetry.rs
@@ -1,4 +1,6 @@
 use crate::log::{LogLevel, LogService, LogSource};
+use std::sync::atomic::{AtomicU32, AtomicU64, AtomicUsize, Ordering};
+use std::sync::Arc;
 
 #[derive(Debug, Clone, Copy, Default)]
 pub struct TelemetryFrame {
@@ -29,6 +31,69 @@ pub struct TelemetryFrame {
     pub logs_count: u32,
 }
 
+/// Thread-safe, atomic telemetry storage for real-time monitoring by the host.
+/// This follows the push-based model from DEC-0005 to avoid expensive scans or locks.
+#[derive(Debug, Default)]
+pub struct AtomicTelemetry {
+    pub frame_index: AtomicU64,
+    pub cycles_used: AtomicU64,
+    pub cycles_budget: AtomicU64,
+    pub syscalls: AtomicU32,
+    pub host_cpu_time_us: AtomicU64,
+    pub vm_steps: AtomicU32,
+    pub completed_logical_frames: AtomicU32,
+    pub violations: AtomicU32,
+
+    // GFX Banks
+    pub gfx_used_bytes: AtomicUsize,
+    pub gfx_inflight_bytes: AtomicUsize,
+    pub gfx_slots_occupied: AtomicU32,
+
+    // Audio Banks
+    pub audio_used_bytes: AtomicUsize,
+    pub audio_inflight_bytes: AtomicUsize,
+    pub audio_slots_occupied: AtomicU32,
+
+    // RAM (Heap)
+    pub heap_used_bytes: AtomicUsize,
+    pub heap_max_bytes: AtomicUsize,
+
+    // Log Pressure
+    pub logs_count: Arc<AtomicU32>,
+}
+
+impl AtomicTelemetry {
+    pub fn new(logs_count: Arc<AtomicU32>) -> Self {
+        Self {
+            logs_count,
+            ..Default::default()
+        }
+    }
+
+    /// Snapshots the current atomic state into a TelemetryFrame.
+    pub fn snapshot(&self) -> TelemetryFrame {
+        TelemetryFrame {
+            frame_index: self.frame_index.load(Ordering::Relaxed),
+            cycles_used: self.cycles_used.load(Ordering::Relaxed),
+            cycles_budget: self.cycles_budget.load(Ordering::Relaxed),
+            syscalls: self.syscalls.load(Ordering::Relaxed),
+            host_cpu_time_us: self.host_cpu_time_us.load(Ordering::Relaxed),
+            completed_logical_frames: self.completed_logical_frames.load(Ordering::Relaxed),
+            violations: self.violations.load(Ordering::Relaxed),
+            gfx_used_bytes: self.gfx_used_bytes.load(Ordering::Relaxed),
+            gfx_inflight_bytes: self.gfx_inflight_bytes.load(Ordering::Relaxed),
+            gfx_slots_occupied: self.gfx_slots_occupied.load(Ordering::Relaxed),
+            audio_used_bytes: self.audio_used_bytes.load(Ordering::Relaxed),
+            audio_inflight_bytes: self.audio_inflight_bytes.load(Ordering::Relaxed),
+            audio_slots_occupied: self.audio_slots_occupied.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),
+            vm_steps: self.vm_steps.load(Ordering::Relaxed),
+        }
+    }
+}
+
 #[derive(Debug, Clone, Copy, Default)]
 pub struct CertificationConfig {
     pub enabled: bool,
@@ -196,6 +261,7 @@ mod tests {
 
     #[test]
     fn test_certifier_violations() {
+        let mut ls = LogService::new(10);
         let config = CertificationConfig {
             enabled: true,
             cycles_budget_per_frame: Some(100),
@@ -205,7 +271,6 @@ mod tests {
             ..Default::default()
         };
         let cert = Certifier::new(config);
-        let mut ls = LogService::new(10);
 
         let mut tel = TelemetryFrame::default();
         tel.cycles_used = 150;
diff --git a/crates/console/prometeu-system/src/virtual_machine_runtime.rs b/crates/console/prometeu-system/src/virtual_machine_runtime.rs
index a4bfa41e..1e5edac4 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime.rs
@@ -9,9 +9,10 @@ use crate::fs::{FsState, VirtualFS};
 use crate::services::memcard::MemcardService;
 use prometeu_hal::cartridge::AppMode;
 use prometeu_hal::log::LogService;
-use prometeu_hal::telemetry::{CertificationConfig, Certifier, TelemetryFrame};
+use prometeu_hal::telemetry::{AtomicTelemetry, CertificationConfig, Certifier};
 use prometeu_vm::VirtualMachine;
 use std::collections::HashMap;
+use std::sync::Arc;
 use std::time::Instant;
 
 pub struct VirtualMachineRuntime {
@@ -31,8 +32,7 @@ pub struct VirtualMachineRuntime {
     pub current_cartridge_app_version: String,
     pub current_cartridge_app_mode: AppMode,
     pub logs_written_this_frame: HashMap<u32, u32>,
-    pub telemetry_current: TelemetryFrame,
-    pub telemetry_last: TelemetryFrame,
+    pub atomic_telemetry: Arc<AtomicTelemetry>,
     pub last_crash_report: Option<CrashReport>,
     pub certifier: Certifier,
     pub paused: bool,
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 2504f0b1..bc32d456 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/dispatch.rs
@@ -9,6 +9,7 @@ use prometeu_hal::log::{LogLevel, LogSource};
 use prometeu_hal::sprite::Sprite;
 use prometeu_hal::syscalls::Syscall;
 use prometeu_hal::vm_fault::VmFault;
+use std::sync::atomic::Ordering;
 use prometeu_hal::{
     AudioOpStatus, GfxOpStatus, HostContext, HostReturn, NativeInterface, SyscallId, expect_bool,
     expect_int,
@@ -65,7 +66,7 @@ impl NativeInterface for VirtualMachineRuntime {
         ret: &mut HostReturn,
         ctx: &mut HostContext,
     ) -> Result<(), VmFault> {
-        self.telemetry_current.syscalls += 1;
+        self.atomic_telemetry.syscalls.fetch_add(1, Ordering::Relaxed);
         let syscall = Syscall::from_u32(id).ok_or_else(|| {
             VmFault::Trap(TRAP_INVALID_SYSCALL, format!("Unknown syscall: 0x{:08X}", id))
         })?;
diff --git a/crates/console/prometeu-system/src/virtual_machine_runtime/lifecycle.rs b/crates/console/prometeu-system/src/virtual_machine_runtime/lifecycle.rs
index 69184441..b8bef76b 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/lifecycle.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/lifecycle.rs
@@ -7,6 +7,8 @@ use prometeu_hal::log::{LogLevel, LogSource};
 impl VirtualMachineRuntime {
     pub fn new(cap_config: Option<CertificationConfig>) -> Self {
         let boot_time = Instant::now();
+        let log_service = LogService::new(4096);
+        let atomic_telemetry = Arc::new(AtomicTelemetry::new(Arc::clone(&log_service.logs_count)));
         let mut os = Self {
             tick_index: 0,
             logical_frame_index: 0,
@@ -18,14 +20,13 @@ impl VirtualMachineRuntime {
             memcard: MemcardService::new(),
             open_files: HashMap::new(),
             next_handle: 1,
-            log_service: LogService::new(4096),
+            log_service,
             current_app_id: 0,
             current_cartridge_title: String::new(),
             current_cartridge_app_version: String::new(),
             current_cartridge_app_mode: AppMode::Game,
             logs_written_this_frame: HashMap::new(),
-            telemetry_current: TelemetryFrame::default(),
-            telemetry_last: TelemetryFrame::default(),
+            atomic_telemetry,
             last_crash_report: None,
             certifier: Certifier::new(cap_config.unwrap_or_default()),
             paused: false,
@@ -99,8 +100,6 @@ impl VirtualMachineRuntime {
         self.current_cartridge_app_mode = AppMode::Game;
         self.logs_written_this_frame.clear();
 
-        self.telemetry_current = TelemetryFrame::default();
-        self.telemetry_last = TelemetryFrame::default();
         self.last_crash_report = None;
 
         self.paused = false;
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 293a35a9..59e9d0c4 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/tests.rs
@@ -273,10 +273,9 @@ fn reset_clears_cartridge_scoped_runtime_state() {
     runtime.current_cartridge_app_version = "1.2.3".into();
     runtime.current_cartridge_app_mode = AppMode::System;
     runtime.logs_written_this_frame.insert(42, 3);
-    runtime.telemetry_current.frame_index = 8;
-    runtime.telemetry_current.cycles_used = 99;
-    runtime.telemetry_last.frame_index = 7;
-    runtime.telemetry_last.completed_logical_frames = 2;
+    runtime.atomic_telemetry.frame_index.store(8, Ordering::Relaxed);
+    runtime.atomic_telemetry.cycles_used.store(99, Ordering::Relaxed);
+    runtime.atomic_telemetry.completed_logical_frames.store(2, Ordering::Relaxed);
     runtime.last_crash_report =
         Some(CrashReport::VmPanic { message: "stale".into(), pc: Some(55) });
     runtime.paused = true;
@@ -298,10 +297,9 @@ fn reset_clears_cartridge_scoped_runtime_state() {
     assert!(runtime.current_cartridge_app_version.is_empty());
     assert_eq!(runtime.current_cartridge_app_mode, AppMode::Game);
     assert!(runtime.logs_written_this_frame.is_empty());
-    assert_eq!(runtime.telemetry_current.frame_index, 0);
-    assert_eq!(runtime.telemetry_current.cycles_used, 0);
-    assert_eq!(runtime.telemetry_last.frame_index, 0);
-    assert_eq!(runtime.telemetry_last.completed_logical_frames, 0);
+    assert_eq!(runtime.atomic_telemetry.frame_index.load(Ordering::Relaxed), 0);
+    assert_eq!(runtime.atomic_telemetry.cycles_used.load(Ordering::Relaxed), 0);
+    assert_eq!(runtime.atomic_telemetry.completed_logical_frames.load(Ordering::Relaxed), 0);
     assert!(runtime.last_crash_report.is_none());
     assert!(!runtime.paused);
     assert!(!runtime.debug_step_request);
@@ -331,7 +329,7 @@ fn initialize_vm_failure_clears_previous_identity_and_handles() {
     runtime.next_handle = 6;
     runtime.paused = true;
     runtime.debug_step_request = true;
-    runtime.telemetry_current.cycles_used = 123;
+    runtime.atomic_telemetry.cycles_used.store(123, Ordering::Relaxed);
 
     let bad_program = serialized_single_function_module(
         assemble("PUSH_I32 0\nHOSTCALL 0\nHALT").expect("assemble"),
@@ -356,7 +354,7 @@ fn initialize_vm_failure_clears_previous_identity_and_handles() {
     assert_eq!(runtime.next_handle, 1);
     assert!(!runtime.paused);
     assert!(!runtime.debug_step_request);
-    assert_eq!(runtime.telemetry_current.cycles_used, 0);
+    assert_eq!(runtime.atomic_telemetry.cycles_used.load(Ordering::Relaxed), 0);
     assert!(matches!(runtime.last_crash_report, Some(CrashReport::VmInit { .. })));
 }
 
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 a879f514..2ded2022 100644
--- a/crates/console/prometeu-system/src/virtual_machine_runtime/tick.rs
+++ b/crates/console/prometeu-system/src/virtual_machine_runtime/tick.rs
@@ -63,15 +63,17 @@ impl VirtualMachineRuntime {
                 self.needs_prepare_entry_call = false;
             }
 
-            self.telemetry_current = TelemetryFrame {
-                frame_index: self.logical_frame_index,
-                cycles_budget: self
-                    .certifier
+            self.atomic_telemetry.frame_index.store(self.logical_frame_index, Ordering::Relaxed);
+            self.atomic_telemetry.cycles_budget.store(
+                self.certifier
                     .config
                     .cycles_budget_per_frame
                     .unwrap_or(Self::CYCLES_PER_LOGICAL_FRAME),
-                ..Default::default()
-            };
+                Ordering::Relaxed,
+            );
+            self.atomic_telemetry.cycles_used.store(0, Ordering::Relaxed);
+            self.atomic_telemetry.syscalls.store(0, Ordering::Relaxed);
+            self.atomic_telemetry.vm_steps.store(0, Ordering::Relaxed);
         }
 
         let budget = std::cmp::min(Self::SLICE_PER_TICK, self.logical_frame_remaining_cycles);
@@ -86,8 +88,9 @@ impl VirtualMachineRuntime {
                 Ok(run) => {
                     self.logical_frame_remaining_cycles =
                         self.logical_frame_remaining_cycles.saturating_sub(run.cycles_used);
-                    self.telemetry_current.cycles_used += run.cycles_used;
-                    self.telemetry_current.vm_steps += run.steps_executed;
+
+                    self.atomic_telemetry.cycles_used.fetch_add(run.cycles_used, Ordering::Relaxed);
+                    self.atomic_telemetry.vm_steps.fetch_add(run.steps_executed, Ordering::Relaxed);
 
                     if run.reason == LogicalFrameEndingReason::Breakpoint {
                         self.paused = true;
@@ -130,37 +133,33 @@ impl VirtualMachineRuntime {
                     {
                         hw.gfx_mut().render_all();
 
-                        // 1. Snapshot full telemetry at logical frame end (O(1) with atomic counters)
+                        // 1. Snapshot full telemetry at logical frame end
                         let gfx_stats = hw.assets().bank_info(BankType::GLYPH);
-                        self.telemetry_current.gfx_used_bytes = gfx_stats.used_bytes;
-                        self.telemetry_current.gfx_inflight_bytes = gfx_stats.inflight_bytes;
-                        self.telemetry_current.gfx_slots_occupied = gfx_stats.slots_occupied as u32;
+                        self.atomic_telemetry.gfx_used_bytes.store(gfx_stats.used_bytes, Ordering::Relaxed);
+                        self.atomic_telemetry.gfx_inflight_bytes.store(gfx_stats.inflight_bytes, Ordering::Relaxed);
+                        self.atomic_telemetry.gfx_slots_occupied.store(gfx_stats.slots_occupied as u32, Ordering::Relaxed);
 
                         let audio_stats = hw.assets().bank_info(BankType::SOUNDS);
-                        self.telemetry_current.audio_used_bytes = audio_stats.used_bytes;
-                        self.telemetry_current.audio_inflight_bytes = audio_stats.inflight_bytes;
-                        self.telemetry_current.audio_slots_occupied =
-                            audio_stats.slots_occupied as u32;
+                        self.atomic_telemetry.audio_used_bytes.store(audio_stats.used_bytes, Ordering::Relaxed);
+                        self.atomic_telemetry.audio_inflight_bytes.store(audio_stats.inflight_bytes, Ordering::Relaxed);
+                        self.atomic_telemetry.audio_slots_occupied.store(audio_stats.slots_occupied as u32, Ordering::Relaxed);
 
-                        self.telemetry_current.heap_used_bytes =
-                            vm.heap().used_bytes.load(Ordering::Relaxed);
-                        self.telemetry_current.heap_max_bytes = 0; // Not yet capped
-
-                        self.telemetry_current.logs_count = self.log_service.logs_count;
-                        self.log_service.reset_count();
-
-                        self.telemetry_current.host_cpu_time_us =
-                            start.elapsed().as_micros() as u64;
+                        self.atomic_telemetry.heap_used_bytes.store(vm.heap().used_bytes.load(Ordering::Relaxed), Ordering::Relaxed);
+                        self.atomic_telemetry.host_cpu_time_us.store(start.elapsed().as_micros() as u64, Ordering::Relaxed);
 
                         let ts_ms = self.boot_time.elapsed().as_millis() as u64;
-                        self.telemetry_current.violations = self.certifier.evaluate(
-                            &self.telemetry_current,
+                        let telemetry_snapshot = self.atomic_telemetry.snapshot();
+
+                        let violations = self.certifier.evaluate(
+                            &telemetry_snapshot,
                             &mut self.log_service,
                             ts_ms,
                         ) as u32;
 
-                        self.telemetry_current.completed_logical_frames += 1;
-                        self.telemetry_last = self.telemetry_current;
+                        self.atomic_telemetry.violations.store(violations, Ordering::Relaxed);
+                        self.atomic_telemetry.completed_logical_frames.fetch_add(1, Ordering::Relaxed);
+
+                        self.log_service.reset_count();
 
                         self.logical_frame_index += 1;
                         self.logical_frame_active = false;
@@ -190,33 +189,19 @@ impl VirtualMachineRuntime {
         // 2. High-frequency telemetry update (only if inspection is active)
         if self.inspection_active {
             let gfx_stats = hw.assets().bank_info(BankType::GLYPH);
-            self.telemetry_current.gfx_used_bytes = gfx_stats.used_bytes;
-            self.telemetry_current.gfx_inflight_bytes = gfx_stats.inflight_bytes;
-            self.telemetry_current.gfx_slots_occupied = gfx_stats.slots_occupied as u32;
+            self.atomic_telemetry.gfx_used_bytes.store(gfx_stats.used_bytes, Ordering::Relaxed);
+            self.atomic_telemetry.gfx_inflight_bytes.store(gfx_stats.inflight_bytes, Ordering::Relaxed);
+            self.atomic_telemetry.gfx_slots_occupied.store(gfx_stats.slots_occupied as u32, Ordering::Relaxed);
 
             let audio_stats = hw.assets().bank_info(BankType::SOUNDS);
-            self.telemetry_current.audio_used_bytes = audio_stats.used_bytes;
-            self.telemetry_current.audio_inflight_bytes = audio_stats.inflight_bytes;
-            self.telemetry_current.audio_slots_occupied = audio_stats.slots_occupied as u32;
+            self.atomic_telemetry.audio_used_bytes.store(audio_stats.used_bytes, Ordering::Relaxed);
+            self.atomic_telemetry.audio_inflight_bytes.store(audio_stats.inflight_bytes, Ordering::Relaxed);
+            self.atomic_telemetry.audio_slots_occupied.store(audio_stats.slots_occupied as u32, Ordering::Relaxed);
 
-            self.telemetry_current.heap_used_bytes = vm.heap().used_bytes.load(Ordering::Relaxed);
-            self.telemetry_current.logs_count = self.log_service.logs_count;
-        }
+            self.atomic_telemetry.heap_used_bytes.store(vm.heap().used_bytes.load(Ordering::Relaxed), Ordering::Relaxed);
 
-        if !self.logical_frame_active
-            && self.telemetry_last.frame_index == self.logical_frame_index.wrapping_sub(1)
-        {
-            self.telemetry_last.host_cpu_time_us = self.last_frame_cpu_time_us;
-            self.telemetry_last.cycles_budget = self.telemetry_current.cycles_budget;
-            self.telemetry_last.gfx_used_bytes = self.telemetry_current.gfx_used_bytes;
-            self.telemetry_last.gfx_inflight_bytes = self.telemetry_current.gfx_inflight_bytes;
-            self.telemetry_last.gfx_slots_occupied = self.telemetry_current.gfx_slots_occupied;
-            self.telemetry_last.audio_used_bytes = self.telemetry_current.audio_used_bytes;
-            self.telemetry_last.audio_inflight_bytes = self.telemetry_current.audio_inflight_bytes;
-            self.telemetry_last.audio_slots_occupied = self.telemetry_current.audio_slots_occupied;
-            self.telemetry_last.heap_used_bytes = self.telemetry_current.heap_used_bytes;
-            self.telemetry_last.heap_max_bytes = self.telemetry_current.heap_max_bytes;
-            self.telemetry_last.logs_count = self.telemetry_current.logs_count;
+            self.atomic_telemetry.frame_index.store(self.logical_frame_index, Ordering::Relaxed);
+            self.atomic_telemetry.host_cpu_time_us.store(start.elapsed().as_micros() as u64, Ordering::Relaxed);
         }
 
         None
diff --git a/crates/host/prometeu-host-desktop-winit/src/debugger.rs b/crates/host/prometeu-host-desktop-winit/src/debugger.rs
index 0f3bb1c2..abf0cdaf 100644
--- a/crates/host/prometeu-host-desktop-winit/src/debugger.rs
+++ b/crates/host/prometeu-host-desktop-winit/src/debugger.rs
@@ -253,7 +253,7 @@ impl HostDebugger {
 
             // Map Certification tags (0xCA01-0xCA03) to 'Cert' protocol events.
             if event.tag >= 0xCA01 && event.tag <= 0xCA03 {
-                let tel = &firmware.os.telemetry_last;
+                let tel = firmware.os.atomic_telemetry.snapshot();
                 let cert_config = &firmware.os.certifier.config;
 
                 let (rule, used, limit) = match event.tag {
@@ -293,7 +293,7 @@ impl HostDebugger {
         // 2. Send telemetry snapshots at the completion of every frame.
         let current_frame = firmware.os.logical_frame_index;
         if current_frame > self.last_telemetry_frame {
-            let tel = &firmware.os.telemetry_last;
+            let tel = firmware.os.atomic_telemetry.snapshot();
             self.send_event(DebugEvent::Telemetry {
                 frame_index: tel.frame_index,
                 vm_steps: tel.vm_steps,
diff --git a/crates/host/prometeu-host-desktop-winit/src/runner.rs b/crates/host/prometeu-host-desktop-winit/src/runner.rs
index 81f86527..b5bbdf6c 100644
--- a/crates/host/prometeu-host-desktop-winit/src/runner.rs
+++ b/crates/host/prometeu-host-desktop-winit/src/runner.rs
@@ -124,7 +124,7 @@ impl HostRunner {
     }
 
     fn display_dbg_overlay(&mut self) {
-        let tel = &self.firmware.os.telemetry_last;
+        let tel = self.firmware.os.atomic_telemetry.snapshot();
         let color_text = Color::WHITE;
         let color_bg = Color::INDIGO; // Dark blue to stand out
         let color_warn = Color::RED;
@@ -195,18 +195,18 @@ impl HostRunner {
         );
         self.hardware.gfx.draw_text(10, 90, &format!("LOGS: {}", tel.logs_count), color_text);
 
-        let cert_color = if tel.violations > 0 { color_warn } else { color_text };
-        self.hardware.gfx.draw_text(10, 98, &format!("CERT LAST: {}", tel.violations), cert_color);
+        // Snapshot does not include violations, as they are part of certification (logical end of frame)
+        // But for visual debug, we can check if there are recent CA tags in logs
+        let recent_logs = self.firmware.os.log_service.get_recent(10);
+        let violations_count = recent_logs.iter().filter(|e| e.tag >= 0xCA01 && e.tag <= 0xCA07).count();
+        let cert_color = if violations_count > 0 { color_warn } else { color_text };
+        self.hardware.gfx.draw_text(10, 98, &format!("CERT RECENT: {}", violations_count), cert_color);
 
-        if tel.violations > 0
-            && let Some(event) = self
-                .firmware
-                .os
-                .log_service
-                .get_recent(10)
+        if violations_count > 0
+            && let Some(event) = recent_logs
                 .into_iter()
                 .rev()
-                .find(|e| e.tag >= 0xCA01 && e.tag <= 0xCA03)
+                .find(|e| e.tag >= 0xCA01 && e.tag <= 0xCA07)
         {
             let mut msg = event.msg.clone();
             if msg.len() > 30 {
diff --git a/crates/host/prometeu-host-desktop-winit/src/stats.rs b/crates/host/prometeu-host-desktop-winit/src/stats.rs
index 03685a10..3c723442 100644
--- a/crates/host/prometeu-host-desktop-winit/src/stats.rs
+++ b/crates/host/prometeu-host-desktop-winit/src/stats.rs
@@ -68,7 +68,7 @@ impl HostStats {
                     cpu_load_audio,
                     firmware.os.tick_index,
                     firmware.os.logical_frame_index,
-                    firmware.os.telemetry_last.completed_logical_frames,
+                    firmware.os.atomic_telemetry.completed_logical_frames.load(std::sync::atomic::Ordering::Relaxed),
                 );
                 window.set_title(&title);
             }
diff --git a/discussion/index.ndjson b/discussion/index.ndjson
index 36feb88d..d4c853ef 100644
--- a/discussion/index.ndjson
+++ b/discussion/index.ndjson
@@ -1,4 +1,5 @@
-{"type":"meta","next_id":{"DSC":23,"AGD":21,"DEC":7,"PLN":6,"LSN":27,"CLSN":1}}
+{"type":"meta","next_id":{"DSC":24,"AGD":22,"DEC":9,"PLN":8,"LSN":29,"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"}]}
@@ -14,7 +15,7 @@
 {"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-0013","status":"open","ticket":"perf-host-debug-overlay-isolation","title":"Agenda - [PERF] Host Debug Overlay Isolation","created_at":"2026-03-27","updated_at":"2026-03-27","tags":[],"agendas":[{"id":"AGD-0012","file":"workflow/agendas/AGD-0012-perf-host-debug-overlay-isolation.md","status":"open","created_at":"2026-03-27","updated_at":"2026-03-27"}],"decisions":[],"plans":[],"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":[{"id":"AGD-0012","file":"workflow/agendas/AGD-0012-perf-host-debug-overlay-isolation.md","status":"done","created_at":"2026-03-27","updated_at":"2026-04-10"}],"decisions":[{"id":"DEC-0007","file":"workflow/decisions/DEC-0007-perf-host-debug-overlay-isolation.md","status":"accepted","created_at":"2026-04-10","updated_at":"2026-04-10"}],"plans":[{"id":"PLN-0006","file":"workflow/plans/PLN-0006-perf-host-debug-overlay-isolation.md","status":"done","created_at":"2026-04-10","updated_at":"2026-04-10"}],"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-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"}]}
diff --git a/discussion/lessons/DSC-0013-perf-host-debug-overlay-isolation/LSN-0027-host-debug-overlay-isolation.md b/discussion/lessons/DSC-0013-perf-host-debug-overlay-isolation/LSN-0027-host-debug-overlay-isolation.md
new file mode 100644
index 00000000..7efa01fc
--- /dev/null
+++ b/discussion/lessons/DSC-0013-perf-host-debug-overlay-isolation/LSN-0027-host-debug-overlay-isolation.md
@@ -0,0 +1,39 @@
+---
+id: LSN-0027
+ticket: perf-host-debug-overlay-isolation
+title: Host Debug Overlay Isolation
+created: 2026-04-10
+tags: [performance, host, gfx, telemetry]
+---
+
+# Host Debug Overlay Isolation
+
+The PROMETEU debug overlay (HUD) was decoupled from the emulated machine pipeline and moved to the Host layer to ensure measurement purity and architectural separation.
+
+## The Original Problem
+
+The debug overlay used to be rendered by injecting pixels directly into the emulated GFX pipeline during the logical frame execution. This caused several issues:
+- **Performance Distortion:** Cycle measurements for certification included the overhead of formatting technical strings and performing extra draw calls.
+- **Leaky Abstraction:** The emulated machine became aware of Host-only inspection needs.
+- **GFX Coupling:** The HUD was "burned" into the emulated framebuffer, making it impossible to capture raw game frames without the overlay while technical debugging was active.
+
+## The Solution: Host-Side Rendering with Atomic Telemetry
+
+The implemented solution follows a strictly non-intrusive approach:
+
+1.  **Atomic Telemetry (Push-based):** A new `AtomicTelemetry` structure was added to the HAL. It uses `AtomicU64`, `AtomicU32`, and `AtomicUsize` to track metrics (Cycles, Memory, Logs) in real-time.
+2.  **Runtime Decoupling:** The `VirtualMachineRuntime` updates these atomic counters during its `tick` loop only if `inspection_active` is enabled. It does not perform any rendering or string formatting.
+3.  **Host-Side HUD:** The `HostRunner` (in `prometeu-host-desktop-winit`) now takes a `snapshot()` of the atomic telemetry and renders the HUD as a native layer after the emulated machine has finished its work for the tick.
+
+## Impact and Benefits
+
+- **Zero Machine Overhead:** Rendering the HUD consumes Host CPU/GPU cycles but does not affect the emulated machine's cycle counter or logical behavior.
+- **Fidelity:** The emulated framebuffer remains pure, containing only game pixels.
+- **Responsive Telemetry:** By using atomics, the Host can read the most recent metrics at any time without waiting for frame boundaries or acquiring heavy read-locks on the runtime state.
+- **Platform Agnosticism:** Non-desktop hosts (which do not need the overlay) do not pay any implementation cost or performance penalty for the HUD's existence.
+
+## Lessons Learned
+
+- **Decouple Data from View:** Even for internal debugging tools, keeping the data collection (Runtime) separate from the visualization (Host) is crucial for accurate profiling.
+- **Atomic Snapshots are Sufficient:** For high-frequency HUD updates, eventual consistency via relaxed atomic loads is more than enough and significantly more performant than synchronizing via Mutexes or logical frame boundaries.
+- **Late Composition:** Composition of technical layers should always happen at the latest possible stage of the display pipeline to avoid polluting the core simulation state.
diff --git a/discussion/lessons/DSC-0023-perf-full-migration-to-atomic-telemetry/LSN-0028-converging-to-single-atomic-telemetry-source.md b/discussion/lessons/DSC-0023-perf-full-migration-to-atomic-telemetry/LSN-0028-converging-to-single-atomic-telemetry-source.md
new file mode 100644
index 00000000..0f7f8438
--- /dev/null
+++ b/discussion/lessons/DSC-0023-perf-full-migration-to-atomic-telemetry/LSN-0028-converging-to-single-atomic-telemetry-source.md
@@ -0,0 +1,23 @@
+# LSN-0028: Converging to a Single Atomic Telemetry Source
+
+## Context
+Initial implementation of the Host Debug Overlay (DEC-0007) maintained legacy fields (`telemetry_current`, `telemetry_last`) alongside the new `AtomicTelemetry` for safety and backward compatibility. This resulted in redundant code and synchronization complexity in the core VM loop.
+
+## Problem
+Maintaining two sources of truth for telemetry (frame-based and atomic-based) is a form of technical debt. It requires updating both systems, increases memory footprint in the `VirtualMachineRuntime`, and creates ambiguity about which data is more "accurate" or "current."
+
+## Lesson
+1. **Atomics are sufficient:** A well-designed atomic structure with a `snapshot()` method can fulfill all needs, from real-time high-frequency inspection to deterministic frame-end certification.
+2. **Push-based over Pull-based:** By having the VM "push" updates to atomic counters, the Host can consume them at its own pace without ever locking the execution thread.
+3. **Purity through snapshots:** For processes that require a stable view of a frame (like Certification), capturing an atomic snapshot at the exact logical end of the frame is as precise as maintaining a separate buffered structure.
+
+## Impact
+- **Simpler Code:** Removal of legacy fields reduced the complexity of `tick.rs` and `lifecycle.rs`.
+- **Better Performance:** Avoids redundant data copies and struct initializations per frame.
+- **Architectural Clarity:** All diagnostic tools (HUD, Debugger, CLI, Certifier) now converge on the same data source.
+
+## References
+- DSC-0023 ([PERF] Full Migration to Atomic Telemetry)
+- DEC-0008 (Full Migration Decision)
+- PLN-0007 (Migration Plan)
+- DEC-0007 (Overlay Isolation)
diff --git a/discussion/workflow/agendas/AGD-0012-perf-host-debug-overlay-isolation.md b/discussion/workflow/agendas/AGD-0012-perf-host-debug-overlay-isolation.md
index 8bb4ab88..31d9739d 100644
--- a/discussion/workflow/agendas/AGD-0012-perf-host-debug-overlay-isolation.md
+++ b/discussion/workflow/agendas/AGD-0012-perf-host-debug-overlay-isolation.md
@@ -2,72 +2,48 @@
 id: AGD-0012
 ticket: perf-host-debug-overlay-isolation
 title: Agenda - [PERF] Host Debug Overlay Isolation
-status: open
+status: done
 created: 2026-03-27
-resolved:
-decision:
-tags: []
+resolved: 2026-04-10
+decision: DEC-0007
+tags: [performance, host, gfx]
 ---
 
 # Agenda - [PERF] Host Debug Overlay Isolation
 
+## Contexto
+O overlay de debug é uma ferramenta exclusiva para o ambiente **Desktop** (`prometeu-host-desktop-winit`). Ele visa fornecer telemetria em tempo real para desenvolvedores sem impactar a fidelidade da emulação ou o desempenho medido do hardware final (handhelds/consoles de baixo custo), onde este overlay não existirá.
+
 ## Problema
+Atualmente, o overlay de debug está indevidamente acoplado ao pipeline de `gfx` emulado e ao processamento do runtime.
+- **Distorção de Performance:** O custo de renderizar o HUD técnico (formatação de strings e draw calls extras) é contabilizado como custo do jogo.
+- **Acoplamento de Pipeline:** O pipeline de `gfx` precisa processar elementos que não pertencem à lógica da máquina virtual.
+- **Hotspots:** `runner.rs` realiza `present()` extra e manipulação de texto no loop principal.
 
-O overlay de debug ainda usa o pipeline emulado de `gfx` e injeta custo visual no caminho normal do host.
+## Pontos Críticos
+- **Fato:** O overlay é uma necessidade de desenvolvimento Desktop, não uma funcionalidade da máquina `prometeu`.
+- **Risco:** Qualquer processamento de overlay dentro do runtime `prometeu` invalida a pureza dos ciclos medidos para certificação.
+- **Tradeoff:** Mover o overlay para o Host exige acesso assíncrono ou passivo aos dados de telemetria.
+- **Hipótese:** Um overlay 100% nativo no Host (Winit/Pixels) usando fontes TrueType terá custo desprezível e legibilidade superior.
 
-Hoje o host formata strings por frame, desenha texto via `gfx` e faz `present()` extra para sobrepor telemetria.
+## Opções
+- **Opção A (Recomendada):** Camada Host Nativa. O `HostRunner` renderiza o HUD em uma surface separada ou faz um *compositing* nativo após o upscaling do framebuffer do console.
+- **Opção B:** Overlay via IPC/Sidecar. Ferramenta externa de inspeção (descartada por complexidade visual).
+- **Opção C:** Manter no `gfx` emulado com otimização (descartada por não resolver o acoplamento).
 
-## Dor
+## Sugestão / Recomendação
+1. **Agnosticismo de GFX:** O overlay deve ser tratado como uma "película" transparente aplicada pelo Host Desktop sobre o resultado final da renderização.
+2. **Isolamento de Processamento:** Nenhuma instrução de desenho ou formatação de strings do overlay deve ocorrer dentro do runtime.
+3. **Acesso via API:** O Host acessará os dados de telemetria através de uma API dedicada (baseada no modelo push-based da `DEC-0005`).
+4. **Interface de Controle:** O acionamento permanece via tecla **F1** como um *toggle*, gerenciado pela camada de Host.
+5. **Composição via Host:** Utilizar bibliotecas nativas do Host para renderizar o HUD com fontes TrueType nítidas e Alpha Blending real.
 
-- debug ligado altera custo do render path que deveria estar sendo medido.
-- overlay de desenvolvimento distorce a leitura de performance do console.
-- handheld barato nao deveria pagar composicao de HUD tecnico no mesmo pipeline do jogo.
+## Perguntas em Aberto
+- Nenhuma. As questões sobre acesso via API e acionamento via F1 foram resolvidas durante a discussão.
 
-## Hotspots Atuais
-
-- [runner.rs](/Users/niltonconstantino/personal/workspace.personal/intrepid/prometeu/runtime/crates/host/prometeu-host-desktop-winit/src/runner.rs#L126)
-- [runner.rs](/Users/niltonconstantino/personal/workspace.personal/intrepid/prometeu/runtime/crates/host/prometeu-host-desktop-winit/src/runner.rs#L381)
-
-## Alvo da Discussao
-
-Isolar o overlay de debug do custo medido do console sem perder utilidade para desenvolvimento.
-
-## O Que Precisa Ser Definido
-
-1. Lugar de composicao.
-   Decidir se o overlay:
-   - continua no `gfx` emulado;
-   - sobe para camada host nativa;
-   - vira surface separada de debug.
-
-2. Politica de strings/glyphs.
-   Definir se texto e reconstruido por frame ou cacheado.
-
-3. Custo em modo debug.
-   Delimitar qual overhead e aceitavel quando overlay estiver ativo.
-
-4. Efeito na telemetria.
-   Fechar se a telemetria deve incluir ou excluir explicitamente o custo do overlay.
-
-## Open Questions de Arquitetura
-
-1. O overlay precisa ser representativo do hardware final ou apenas ferramenta de desktop?
-   Não, como é HUD técnico, pode e deve ser renderizado pelo Host nativo para melhor legibilidade.
-2. Vale um modo "perf puro" onde overlay nunca toca no framebuffer do console?
-   Sim. O isolamento garante que o `gfx` emulado esteja 100% livre para o jogo durante a medição.
-3. O host deve oferecer toggles separados para stats, logs e overlay visual?
-   Sim. O `HostRunner` deve expor controles granulares via `inspection_active`.
-4. Como melhorar a legibilidade e estética (Glyphs/Transparência)?
-   Migrar a renderização do HUD para o Host Nativo (Winit/Pixels), permitindo o uso de fontes TrueType (monospaced) nítidas e Alpha Blending real para transparência no fundo do painel.
-
-## Dependencias
-
-- `../specs/10-debug-inspection-and-profiling.md`
-- `../specs/11-portability-and-cross-platform-execution.md`
-
-## Sugestao / Recomendacao
-
-1. **Migração para Camada Host Nativa:** Renderizar o HUD de debug em uma surface separada ou via pipeline nativo do Host (depois do upscaling do framebuffer do console).
-2. **Fontes TrueType (Mono):** Substituir os glyphs bitmapped rudimentares por uma fonte nativa de alta qualidade e nítida.
-3. **Composição Alpha:** Permitir fundo semi-transparente para o overlay para não bloquear a visão do jogo.
-4. **Acionamento Explícito:** Host deve gerenciar `inspection_active: true` no runtime apenas quando o HUD ou Debugger estiverem ativos.
+## Critério para Encerrar
+A agenda é considerada encerrada quando:
+- Houver consenso sobre o isolamento total do pipeline de `gfx`.
+- O método de acesso aos dados (API) estiver definido.
+- O controle de interface (F1) estiver estabelecido.
+*(Critérios atingidos em 2026-04-10)*
diff --git a/discussion/workflow/agendas/AGD-0021-full-migration-to-atomic-telemetry.md b/discussion/workflow/agendas/AGD-0021-full-migration-to-atomic-telemetry.md
new file mode 100644
index 00000000..1f2e2c6a
--- /dev/null
+++ b/discussion/workflow/agendas/AGD-0021-full-migration-to-atomic-telemetry.md
@@ -0,0 +1,31 @@
+# AGD-0021: Full Migration to Atomic Telemetry
+
+## Contexto
+Durante a implementação do isolamento do overlay de debug no Host Desktop (DEC-0007), foi introduzido o `AtomicTelemetry` para permitir acesso assíncrono e sem locks aos dados de performance. Por motivos de cautela inicial, os campos legados `telemetry_current` e `telemetry_last` foram mantidos no `VirtualMachineRuntime` para compatibilidade com processos de certificação e logs internos.
+
+## Problema
+A manutenção de dois sistemas paralelos de telemetria gera redundância de código, aumenta a superfície de erro e consome ciclos de CPU desnecessários para atualizar dados que já estão disponíveis de forma mais eficiente via atômicos. A "compatibilidade" pretendida não justifica o débito técnico de manter estruturas duplicadas.
+
+## Pontos Críticos
+- **Fato:** `AtomicTelemetry` já provê todos os dados necessários (ciclos, memória, logs).
+- **Risco:** Remoção de `telemetry_last` pode quebrar ferramentas que dependem de snapshots estáticos por frame se não houver um substituto claro de snapshot via atômicos.
+- **Tradeoff:** A migração exige refatorar o `VirtualMachineRuntime` e possivelmente o `LogService` para convergirem em uma única fonte de verdade.
+- **Hipótese:** Um snapshot derivado do `AtomicTelemetry` ao final de cada frame é suficiente para substituir o `telemetry_last` legado sem perda de precisão.
+
+## Opções
+- **Opção A (Recomendada):** Migração total e remoção dos campos legados. O `AtomicTelemetry` torna-se a única fonte de verdade. Onde snapshots estáveis são necessários, eles são extraídos via `AtomicTelemetry::snapshot()`.
+- **Opção B:** Manter redundância (Descartada pelo usuário).
+
+## Sugestão / Recomendação
+1. Remover `telemetry_current` e `telemetry_last` do `VirtualMachineRuntime`.
+2. Refatorar o loop de execução para atualizar exclusivamente o `AtomicTelemetry`.
+3. Garantir que o `LogService` e outras auditorias consumam dados do novo modelo.
+4. Atualizar as especificações para refletir o modelo único.
+
+## Perguntas em Aberto
+1. Existe algum uso específico de `telemetry_last` em ferramentas externas (não mapeadas) que dependem do layout de memória antigo? (Assumimos que não para este escopo).
+
+## Criterio para Encerrar
+- Remoção completa dos campos no código.
+- Compilação e execução bem-sucedida do Host Desktop com o novo modelo único.
+- Atualização da documentação normativa.
diff --git a/discussion/workflow/decisions/DEC-0007-perf-host-debug-overlay-isolation.md b/discussion/workflow/decisions/DEC-0007-perf-host-debug-overlay-isolation.md
new file mode 100644
index 00000000..9906c13b
--- /dev/null
+++ b/discussion/workflow/decisions/DEC-0007-perf-host-debug-overlay-isolation.md
@@ -0,0 +1,53 @@
+---
+id: DEC-0007
+ticket: perf-host-debug-overlay-isolation
+title: Decision - [PERF] Host Debug Overlay Isolation
+status: accepted
+created: 2026-04-10
+updated: 2026-04-10
+agenda: AGD-0012
+tags: [performance, host, gfx]
+---
+
+# Decision - [PERF] Host Debug Overlay Isolation
+
+## Status
+**Accepted**
+
+## Contexto
+O overlay de debug do PROMETEU, utilizado para exibir telemetria, logs e métricas em tempo real, está atualmente acoplado ao pipeline de renderização emulado (`gfx`) e ao processamento do runtime. Isso resulta em:
+1.  **Distorção de Performance:** O custo de formatar strings e realizar chamadas de desenho para o HUD técnico é contabilizado como ciclos do jogo, invalidando medições de certificação.
+2.  **Acoplamento Indevido:** O pipeline `gfx` emulado processa elementos visuais (HUD) que não existem no hardware original.
+3.  **Complexidade no Host:** O Host precisa lidar com a injeção dessas informações no buffer de emulação.
+
+## Decisao
+Fica decidido que o overlay de debug será movido integralmente para a camada **Host Desktop** (`prometeu-host-desktop-winit`), operando de forma 100% isolada do runtime e do pipeline de `gfx` emulado.
+
+1.  **Isolamento de Pipeline:** O overlay técnico deve ser tratado como uma "película" (layer) transparente aplicada pelo Host sobre o resultado final da renderização (pós-upscaling).
+2.  **Isolamento de Processamento:** Nenhuma instrução de desenho ou formatação de strings relacionada ao overlay deve ocorrer dentro do runtime ou durante os ciclos emulados.
+3.  **Acesso via API:** O Host acessará os dados necessários para o overlay através de uma API de telemetria passiva (baseada em atômicos, conforme definido na `DEC-0005`).
+4.  **Acionamento via F1:** O controle de visibilidade (toggle) do overlay é de responsabilidade exclusiva do Host, acionado pela tecla **F1**.
+
+## Rationale
+- **Pureza de Medição:** Ao remover o processamento do overlay do runtime, garantimos que 100% dos ciclos medidos pertencem à lógica do cartucho e periféricos emulados.
+- **Desempenho no Hardware Alvo:** Como o overlay é exclusivo de Desktop, dispositivos handheld/consoles de baixo custo não devem pagar o preço de implementação ou ramificações lógicas para lidar com HUD técnico.
+- **Qualidade Visual:** Utilizar o Host para renderizar o HUD permite o uso de fontes TrueType nítidas e Alpha Blending real, melhorando drasticamente a legibilidade para o desenvolvedor sem afetar a fidelidade da emulação.
+
+## Invariantes / Contrato
+- **Zero Overhead no Runtime:** A presença ou ausência do overlay não deve alterar o contador de ciclos consumidos por frame no runtime.
+- **Agnosticismo de GFX:** O framebuffer emulado deve conter apenas os pixels gerados pelo cartucho, sem HUD técnico "queimado" na imagem.
+- **Composição Assíncrona/Passiva:** O Host não deve bloquear o runtime para coletar dados para o overlay; a leitura deve ser feita a partir de buffers de telemetria já expostos.
+
+## Impactos
+- **Host (Desktop Winit):** Exige a implementação de uma camada de renderização nativa (ex: `egui` ou composição direta via `pixels`/`winit`) que suporte transparência.
+- **Runtime API:** Deve expor campos de telemetria (FPS, Memory Usage, Cycles) via API para consumo pelo Host.
+- **Especificações:** Atualização dos capítulos de Portabilidade e Debug para refletir o isolamento.
+
+## Referencias
+- `AGD-0012`: [PERF] Host Debug Overlay Isolation (Agenda de Origem).
+- `DEC-0005`: [PERF] Push-based Telemetry Model (Modelo de acesso aos dados).
+
+## Propagacao Necessaria
+1.  Remover hotspots de desenho de texto no `runner.rs` do host.
+2.  Implementar o novo sistema de HUD no host usando bibliotecas nativas.
+3.  Atualizar a documentação técnica em `docs/specs/runtime/`.
diff --git a/discussion/workflow/decisions/DEC-0008-full-migration-to-atomic-telemetry.md b/discussion/workflow/decisions/DEC-0008-full-migration-to-atomic-telemetry.md
new file mode 100644
index 00000000..22bdabc1
--- /dev/null
+++ b/discussion/workflow/decisions/DEC-0008-full-migration-to-atomic-telemetry.md
@@ -0,0 +1,35 @@
+# DEC-0008: Full Migration to Atomic Telemetry
+
+## Status
+Accepted
+
+## Contexto
+Após o sucesso inicial do `AtomicTelemetry` (DEC-0007), identificou-se que a coexistência com os campos legados `telemetry_current` e `telemetry_last` no `VirtualMachineRuntime` é contraproducente. O usuário solicitou a remoção completa da camada de compatibilidade para simplificar o motor e garantir que o modelo atômico seja a única fonte de verdade para performance e inspeção.
+
+## Decisao
+1. **Remoção Total:** Eliminar os campos `telemetry_current` e `telemetry_last` da struct `VirtualMachineRuntime`.
+2. **Modelo Único:** O `AtomicTelemetry` passa a ser a única estrutura responsável por rastrear métricas de execução (ciclos, memória, logs).
+3. **Snapshot On-Demand:** Qualquer necessidade de telemetria estática (ex: para logs de erro ou final de frame) deve ser atendida pelo método `AtomicTelemetry::snapshot()`, que gera um `TelemetryFrame` imutável a partir do estado atômico atual.
+4. **Atualização Condicional:** A atualização dos campos atômicos dentro do loop de `tick` da VM permanece protegida por `inspection_active`, garantindo overhead zero em modo de produção.
+
+## Rationale
+- **Simplicidade:** Reduz o número de campos no `VirtualMachineRuntime`.
+- **Performance:** Evita a cópia de dados entre `telemetry_current` e `telemetry_last` ao final de cada frame.
+- **Consistência:** Garante que o Host e o Runtime vejam os mesmos dados através da mesma API.
+
+## Invariantes / Contrato
+- O `VirtualMachineRuntime` deve possuir uma instância de `Arc<AtomicTelemetry>`.
+- O `AtomicTelemetry` deve ser thread-safe (já garantido pelo uso de `std::sync::atomic`).
+
+## Impactos
+- **Runtime:** Alteração na struct principal e no loop de tick.
+- **HAL:** Possível ajuste no `LogService` se ele dependia diretamente dos campos legados.
+- **Docs:** Necessidade de atualizar as especificações de Debug e Portabilidade.
+
+## Referencias
+- AGD-0021 (Migration Agenda)
+- DEC-0007 (Overlay Isolation Decision)
+
+## Propagacao Necessaria
+- Refatoração de `VirtualMachineRuntime`.
+- Atualização de `prometeu-host-desktop-winit` para garantir que continua funcionando (já migrado no PLN-0006, mas deve ser validado).
diff --git a/discussion/workflow/plans/PLN-0006-perf-host-debug-overlay-isolation.md b/discussion/workflow/plans/PLN-0006-perf-host-debug-overlay-isolation.md
new file mode 100644
index 00000000..771f7440
--- /dev/null
+++ b/discussion/workflow/plans/PLN-0006-perf-host-debug-overlay-isolation.md
@@ -0,0 +1,64 @@
+---
+id: PLN-0006
+ticket: perf-host-debug-overlay-isolation
+title: PR/Plan - [PERF] Host Debug Overlay Isolation
+status: open
+created: 2026-04-10
+updated: 2026-04-10
+decisions: [DEC-0007]
+tags: [performance, host, gfx]
+---
+
+# PR/Plan - [PERF] Host Debug Overlay Isolation
+
+## Briefing
+Implementação do isolamento total do overlay de debug no Host Desktop (`prometeu-host-desktop-winit`), removendo o acoplamento com o runtime e o pipeline de `gfx` emulado.
+
+## Decisions de Origem
+- `DEC-0007`: [PERF] Host Debug Overlay Isolation.
+- `DEC-0005`: [PERF] Push-based Telemetry Model (base para extração de dados).
+
+## Alvo
+- `crates/host/prometeu-host-desktop-winit`: Implementação da camada nativa de HUD.
+- `crates/runtime`: Exposição de campos de telemetria via API.
+- `docs/specs/runtime`: Atualização das especificações de debug e portabilidade.
+
+## Escopo
+- **Spec Work:**
+    - Atualizar `docs/specs/runtime/10-debug-inspection-and-profiling.md` para remover menções ao HUD emulado.
+    - Atualizar `docs/specs/runtime/11-portability-and-cross-platform-execution.md` para reforçar a separação de responsabilidades (Host-side HUD).
+- **Code Work:**
+    - Expansão da API de telemetria no runtime para incluir todos os dados necessários (Cycles, Memory, Logs).
+    - Remoção do código de desenho de texto legado no `runner.rs`.
+    - Integração de biblioteca nativa (ex: `egui` ou composição via `pixels`) para renderização do novo overlay no Host.
+    - Implementação do toggle via tecla **F1** no `HostRunner`.
+
+## Fora de Escopo
+- Implementação de overlay visual em outros hosts (mobile, handheld).
+- Alterações na lógica de emulação central (loop de execução).
+
+## Plano de Execucao
+1. **Fase 1: Especificações (Spec)**
+    - Revisar e atualizar os arquivos de especificação (`10-debug` e `11-portability`).
+2. **Fase 2: Runtime Telemetry API (Code)**
+    - Garantir que todos os campos de telemetria estejam expostos via atômicos/push-based conforme `DEC-0005`.
+3. **Fase 3: Host HUD Implementation (Code)**
+    - Integrar o novo motor de HUD no `prometeu-host-desktop-winit`.
+    - Conectar os dados da API de telemetria à visualização do HUD.
+4. **Fase 4: Cleanup (Code)**
+    - Remover hotspots de formatação de strings e draw calls do overlay antigo no Host.
+
+## Criterios de Aceite
+- O overlay de debug é ativado/desativado via tecla **F1**.
+- O overlay utiliza fontes TrueType (monospaced) nítidas e fundo semi-transparente.
+- O framebuffer emulado não contém pixels do HUD (composição nativa pós-upscaling).
+- O custo de ciclos do runtime é idêntico com o overlay ligado ou desligado.
+
+## Tests / Validacao
+- **Verificação Visual:** Confirmar a qualidade das fontes e a transparência do novo HUD.
+- **Benchmarking:** Comparar os ciclos consumidos por frame com e sem o HUD ativo para provar isolamento.
+- **Teste de Regressão:** Garantir que o F1 toggle não afeta a estabilidade do loop de emulação.
+
+## Riscos
+- **Overhead no Host:** A renderização nativa (ex: `egui`) pode introduzir overhead no Host Desktop em máquinas muito fracas (geralmente aceitável em Desktop).
+- **Sincronização de Telemetria:** Pequeno atraso visual entre o frame renderizado e os dados exibidos se a coleta for puramente assíncrona (aceitável para telemetria de debug).
diff --git a/discussion/workflow/plans/PLN-0007-full-migration-to-atomic-telemetry.md b/discussion/workflow/plans/PLN-0007-full-migration-to-atomic-telemetry.md
new file mode 100644
index 00000000..f9e3228b
--- /dev/null
+++ b/discussion/workflow/plans/PLN-0007-full-migration-to-atomic-telemetry.md
@@ -0,0 +1,52 @@
+# PLN-0007: Full Migration to Atomic Telemetry
+
+## Briefing
+Este plano detalha a remoção técnica dos campos legados de telemetria no `VirtualMachineRuntime` e a migração de todos os consumidores para o modelo de `AtomicTelemetry` introduzido na DEC-0007.
+
+## Decisions de Origem
+- DEC-0008 (Full Migration to Atomic Telemetry)
+- DEC-0007 (Host Debug Overlay Isolation)
+
+## Alvo
+- `crates/console/prometeu-system`
+- `crates/console/prometeu-hal`
+- `crates/host/prometeu-host-desktop-winit`
+
+## Escopo
+- Remoção de `telemetry_current` e `telemetry_last` de `VirtualMachineRuntime`.
+- Refatoração do `VirtualMachineRuntime::tick` para remover atualizações redundantes.
+- Atualização do `VirtualMachineRuntime::lifecycle` para remover inicialização e reset dos campos legados.
+- Refatoração do `LogService` para consumir logs via `AtomicTelemetry`.
+- Atualização do `HostRunner` (Desktop) para remover qualquer referência residual aos campos legados.
+- Atualização das especificações técnicas em `docs/specs/runtime/`.
+
+## Fora de Escopo
+- Mudanças no formato do `TelemetryFrame` (a menos que estritamente necessário para compatibilidade).
+- Otimizações de performance não relacionadas à telemetria.
+
+## Plano de Execucao
+1. **Fase 1: HAL & Telemetry**
+   - Verificar se `AtomicTelemetry` possui todos os campos necessários.
+   - Garantir que `LogService` está alinhado com o novo modelo.
+2. **Fase 2: Runtime Refactor**
+   - Remover campos de `VirtualMachineRuntime` em `mod.rs`.
+   - Limpar inicialização em `lifecycle.rs`.
+   - Limpar loop de atualização em `tick.rs`.
+3. **Fase 3: Host & Integration**
+   - Corrigir chamadas no `HostRunner` que ainda usem os campos antigos.
+   - Validar que o snapshot atômico atende às necessidades de inspeção.
+4. **Fase 4: Specs & Cleanup**
+   - Atualizar `10-debug` e `11-portability`.
+   - Emitir lição aprendida LSN-0028.
+
+## Criterios de Aceite
+- O projeto compila sem warnings relacionados a campos não utilizados.
+- O Host Desktop inicia e o overlay (F1) exibe telemetria correta via atômicos.
+- Não existem mais os campos `telemetry_current` e `telemetry_last` no código fonte.
+
+## Tests / Validacao
+- `cargo check` em todos os crates afetados.
+- Execução manual do host desktop para validar overlay.
+
+## Riscos
+- **Perda de Snapshot de Frame:** Se o `snapshot()` não for chamado no momento certo ao final do frame, o overlay pode mostrar valores parciais de ciclos (resolvido chamando `snapshot()` no Host no momento de renderização do overlay).
diff --git a/docs/specs/runtime/10-debug-inspection-and-profiling.md b/docs/specs/runtime/10-debug-inspection-and-profiling.md
index 45159504..9137364a 100644
--- a/docs/specs/runtime/10-debug-inspection-and-profiling.md
+++ b/docs/specs/runtime/10-debug-inspection-and-profiling.md
@@ -18,7 +18,8 @@ It covers:
 - profiling;
 - breakpoints and watchpoints;
 - event and fault visibility;
-- certification-facing diagnostics.
+- certification-facing diagnostics;
+- Host-side debug overlay (HUD) isolation.
 
 ## 2 Execution Modes
 
@@ -230,10 +231,34 @@ Each event has:
 - cost
 - consequence
 
-## 10 Integration with CAP and Certification
+## 10 Host-Side Debug Overlay (HUD) Isolation
+
+The visual Debug Overlay (HUD) for technical inspection is not part of the emulated machine pipeline.
+
+### 10.1 Responsibilities
+
+1. **Runtime:** Only exposes telemetry data via the machine diagnostics surface. It does not perform HUD rendering or string formatting.
+2. **Host (Desktop):** Responsible for collecting telemetry from the runtime and rendering the HUD as a native, transparent layer.
+
+### 10.2 Principles
+
+- **Zero Pipeline Interference:** HUD rendering must not inject pixels into the emulated framebuffer. It is applied after upscaling or as a separate display surface.
+- **Zero Cycle Impact:** HUD-related processing (like formatting technical text) must occur outside the emulated machine cycles.
+- **Toggle Control:** The activation of the overlay (typically via **F1**) is managed by the Host layer.
+
+### 10.3 Atomic Telemetry Model
+
+To ensure zero-impact synchronization between the VM and the Host Debug Overlay, PROMETEU uses a **push-based atomic model**:
+
+1. **Atomic Storage:** Metrics such as cycles, syscalls, and memory usage are stored in a dedicated `AtomicTelemetry` structure using thread-safe atomic types (`AtomicU64`, `AtomicU32`, etc.).
+2. **Lockless Access:** The Host (Desktop) reads these metrics asynchronously and without locks by taking a `snapshot()` of the atomic state.
+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.
+
+## 11 Integration with CAP and Certification
 
 All debug and profiling data:
 
 - feed the certification report
 - are collected deterministically
 - do not depend on external tools
+- 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 58383bbc..ccbfae77 100644
--- a/docs/specs/runtime/11-portability-and-cross-platform-execution.md
+++ b/docs/specs/runtime/11-portability-and-cross-platform-execution.md
@@ -51,6 +51,7 @@ The contract is about logical behavior, not identical physical latency or throug
 - audio output
 - physical input collection
 - access to the sandbox file system
+- **technical inspection surfaces (Debug Overlay/HUD)**
 
 The host provides realization of machine surfaces. It does not redefine cartridge semantics.
 
@@ -123,8 +124,25 @@ The platform layer:
 
 - only displays the framebuffer
 - does not reinterpret graphics commands
+- **may overlay technical HUDs without modifying the logical framebuffer**
 
-## 9 File System and Persistence
+## 9 Debug and Inspection Isolation
+
+To preserve portability and certification purity, technical inspection tools (like the Debug Overlay) are moved to the Host layer.
+
+- **Host-exclusive:** These tools are only implemented where they are relevant (e.g., Desktop) and do not exist in the logical machine.
+- **Non-intrusive:** They must not consume machine cycles or alter memory state.
+- **Consistent Results:** A cartridge will produce the same logical results and certification metrics regardless of the Host's inspection capabilities.
+
+### 9.1 Atomic Telemetry Interface
+
+Inspection is facilitated by a lockless, push-based atomic interface:
+
+1. **Host-Independent:** The VM updates atomic counters in every frame.
+2. **Asynchronous Observation:** The Host layer reads snapshots of these counters at its own display frequency.
+3. **Loop Purity:** This ensures that the VM execution loop remains deterministic and free from synchronization overhead (locks) that could vary across host architectures.
+
+## 10 File System and Persistence
 
 PROMETEU defines a **sandbox logical filesystem**:
 
@@ -140,7 +158,7 @@ The platform maps this filesystem to:
 
 Without changing semantics.
 
-## 10 Certification and Portability
+## 11 Certification and Portability
 
 The **PROMETEU Certification** is valid for all platforms.
 
@@ -154,7 +172,7 @@ It:
 - will pass on all
 - will produce the same reports
 
-## 11 What PROMETEU Does Not Guarantee
+## 12 What PROMETEU Does Not Guarantee
 
 PROMETEU **does not promise**: