diff --git a/Cargo.toml b/Cargo.toml
index c54fcc9..e39c189 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,12 +1,12 @@
 # file: Cargo.toml
-# version: 417
+# version: 418
 
 [workspace]
 resolver = "3"
 members = ["crates/ksp-app-backfill-desk", "crates/ksp-app-config-desk", "crates/ksp-app-solprices-desk", "crates/ksp-app-wallet-desk", "crates/ksp-config-lib", "crates/ksp-core-lib", "crates/ksp-interface-lib", "crates/ksp-job-api", "crates/ksp-job-backfill-lib", "crates/ksp-logging-lib", "crates/ksp-offchain-transport-lib", "crates/ksp-onchain-transport-lib", "crates/ksp-program-api", "crates/ksp-store-api", "crates/ksp-store-lib", "crates/ksp-store-postgres-lib", "crates/ksp-wallet-lib"]
 
 [workspace.package]
-version = "0.3.7-pre.2"
+version = "0.3.7-pre.3"
 edition = "2024"
 license = "MIT"
 repository = "https://git.sasedev.com/Sasedev/khadhroony-solana-project"
diff --git a/config/composite.ksp-app-backfill-desk.json b/config/composite.ksp-app-backfill-desk.json
new file mode 100644
index 0000000..11a2914
--- /dev/null
+++ b/config/composite.ksp-app-backfill-desk.json
@@ -0,0 +1,66 @@
+{
+    "format_version": 1,
+    "default_profile": "devnet",
+    "profiles": [
+        {
+            "profile_id": "devnet",
+            "documents": [
+                {
+                    "component_id": "logging",
+                    "file_id": "cfg.std.logging",
+                    "profile_id": "supertrace"
+                },
+                {
+                    "component_id": "transport",
+                    "file_id": "cfg.std.transport",
+                    "profile_id": "devnet_public"
+                },
+                {
+                    "component_id": "store",
+                    "file_id": "cfg.std.store",
+                    "profile_id": "devnet"
+                }
+            ]
+        },
+        {
+            "profile_id": "mainnet",
+            "documents": [
+                {
+                    "component_id": "logging",
+                    "file_id": "cfg.std.logging",
+                    "profile_id": "console_info"
+                },
+                {
+                    "component_id": "transport",
+                    "file_id": "cfg.std.transport",
+                    "profile_id": "mainnet_public"
+                },
+                {
+                    "component_id": "store",
+                    "file_id": "cfg.std.store",
+                    "profile_id": "mainnet"
+                }
+            ]
+        },
+        {
+            "profile_id": "testnet",
+            "documents": [
+                {
+                    "component_id": "logging",
+                    "file_id": "cfg.std.logging",
+                    "profile_id": "console_info"
+                },
+                {
+                    "component_id": "transport",
+                    "file_id": "cfg.std.transport",
+                    "profile_id": "publicnode_testnet"
+                },
+                {
+                    "component_id": "store",
+                    "file_id": "cfg.std.store",
+                    "profile_id": "testnet"
+                }
+            ]
+        }
+    ]
+}
diff --git a/crates/ksp-app-backfill-desk/capabilities/default.json b/crates/ksp-app-backfill-desk/capabilities/default.json
index f44cb76..a775db2 100644
--- a/crates/ksp-app-backfill-desk/capabilities/default.json
+++ b/crates/ksp-app-backfill-desk/capabilities/default.json
@@ -10,4 +10,4 @@
         "core:default",
         "tracing:default"
     ]
-}
+}
\ No newline at end of file
diff --git a/crates/ksp-app-backfill-desk/src/bootstrap.rs b/crates/ksp-app-backfill-desk/src/bootstrap.rs
index 3595cfb..bb37360 100644
--- a/crates/ksp-app-backfill-desk/src/bootstrap.rs
+++ b/crates/ksp-app-backfill-desk/src/bootstrap.rs
@@ -1,7 +1,7 @@
 // file: crates/ksp-app-backfill-desk/src/bootstrap.rs
-// version: 1
+// version: 2
 
-//! Config and Logging bootstrap for the Backfill Desk scaffold.
+//! Config composite and Logging bootstrap for Backfill Desk.
 
 /// Crate-internal Logging startup state shared by the application state.
 pub(crate) struct LoggingStartup {
@@ -43,7 +43,48 @@ pub(crate) fn config_management(arguments: &[std::ffi::OsString]) -> ksp_core_li
     return std::result::Result::Ok(ksp_config_lib::ConfigManagement::new(engine));
 }
 
-/// Initializes Logging from the standard managed Config document, with the common Desk fallback policy.
+/// Loads the concrete Backfill Desk Config composite using its registered logical `file_id` and autonomous default profile.
+pub(crate) fn load_backfill_desk_composite(management: &ksp_config_lib::ConfigManagement) -> ksp_core_lib::Result<ksp_config_lib::ResolvedConfigComposite> {
+    let file_id = ksp_config_lib::ConfigFileId::new(ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK);
+    let file_id = match file_id {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(error) => return std::result::Result::Err(error),
+    };
+    return management.engine().load_resolved_composite(&file_id, std::option::Option::None);
+}
+
+/// Returns one required standard profile from the Backfill Desk composite after validating the referenced logical `file_id`.
+pub(crate) fn required_composite_component_profile(
+    composite: &ksp_config_lib::ResolvedConfigComposite,
+    component_id: &str,
+    expected_file_id: &str,
+) -> ksp_core_lib::Result<ksp_config_lib::ResolvedConfigProfile> {
+    let component = composite.component(component_id);
+    let component = match component {
+        std::option::Option::Some(value) => value,
+        std::option::Option::None => {
+            return std::result::Result::Err(
+                ksp_core_lib::Error::new(crate::ERROR_CODE_CONFIG_COMPOSITE_INVALID, "Backfill Desk composite is missing a required component")
+                    .with_context("composite_file_id", composite.file_id().as_str())
+                    .with_context("composite_profile_id", composite.profile_id())
+                    .with_context("component_id", component_id),
+            );
+        },
+    };
+    if component.resolved().file_id().as_str() != expected_file_id {
+        return std::result::Result::Err(
+            ksp_core_lib::Error::new(crate::ERROR_CODE_CONFIG_COMPOSITE_INVALID, "Backfill Desk composite component references an unexpected Config document")
+                .with_context("composite_file_id", composite.file_id().as_str())
+                .with_context("composite_profile_id", composite.profile_id())
+                .with_context("component_id", component_id)
+                .with_context("expected_file_id", expected_file_id)
+                .with_context("actual_file_id", component.resolved().file_id().as_str()),
+        );
+    }
+    return std::result::Result::Ok(component.resolved().clone());
+}
+
+/// Initializes Logging from the Backfill Desk composite, with a trace-level development fallback.
 pub(crate) fn initialize_logging(
     management: &ksp_config_lib::ConfigManagement,
     runtime_identity: &ksp_logging_lib::LoggingRuntimeIdentity,
@@ -58,7 +99,7 @@ pub(crate) fn initialize_logging(
                         target: crate::TRACING_TARGET,
                         domain = crate::TRACING_DOMAIN_BOOTSTRAP,
                         active_profile = active_profile_id.as_str(),
-                        "initialized Backfill Desk logging from managed configuration"
+                        "initialized Backfill Desk logging from composite-managed configuration"
                     );
                     std::result::Result::Ok(LoggingStartup {
                         guard,
@@ -78,7 +119,7 @@ pub(crate) fn initialize_logging(
 
 fn fallback_logging_settings() -> ksp_logging_lib::LoggingSettings {
     return ksp_logging_lib::LoggingSettings::new(
-        ksp_logging_lib::LogFilterLevel::Info,
+        ksp_logging_lib::LogFilterLevel::Trace,
         ksp_logging_lib::SpanEvents::Off,
         std::option::Option::Some(ksp_logging_lib::ConsoleSettings::stderr()),
         std::vec::Vec::new(),
@@ -91,7 +132,26 @@ fn resolve_logging_startup(management: &ksp_config_lib::ConfigManagement) -> Log
         std::result::Result::Ok(value) => value,
         std::result::Result::Err(error) => return fallback_startup_plan(error),
     };
-    let resolved = management.engine().load_resolved_logging_config(std::option::Option::None, &environment);
+    let composite = crate::load_backfill_desk_composite(management);
+    let composite = match composite {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(error) => return fallback_startup_plan(error),
+    };
+    let logging_profile = crate::required_composite_component_profile(&composite, crate::COMPOSITE_COMPONENT_ID_LOGGING, ksp_config_lib::FILE_ID_STD_LOGGING);
+    let logging_profile = match logging_profile {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(error) => return fallback_startup_plan(error),
+    };
+    let transport_profile =
+        crate::required_composite_component_profile(&composite, crate::COMPOSITE_COMPONENT_ID_TRANSPORT, ksp_config_lib::FILE_ID_STD_TRANSPORT);
+    if let std::result::Result::Err(error) = transport_profile {
+        return fallback_startup_plan(error);
+    }
+    let store_profile = crate::required_composite_component_profile(&composite, crate::COMPOSITE_COMPONENT_ID_STORE, ksp_config_lib::FILE_ID_STD_STORE);
+    if let std::result::Result::Err(error) = store_profile {
+        return fallback_startup_plan(error);
+    }
+    let resolved = management.engine().resolve_logging_config_profile(&logging_profile, &environment);
     let resolved = match resolved {
         std::result::Result::Ok(value) => value,
         std::result::Result::Err(error) => return fallback_startup_plan(error),
@@ -135,7 +195,7 @@ fn initialize_planned_fallback_logging(
         domain = crate::TRACING_DOMAIN_BOOTSTRAP,
         error_domain = diagnostic.domain.as_str(),
         error_code = diagnostic.code.as_str(),
-        "managed Logging configuration is unavailable; using transient in-memory fallback"
+        "managed Logging configuration is unavailable; using transient trace-level development fallback"
     );
     return std::result::Result::Ok(LoggingStartup {
         guard,
@@ -144,3 +204,12 @@ fn initialize_planned_fallback_logging(
         startup_diagnostic: std::option::Option::Some(diagnostic),
     });
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn development_fallback_keeps_trace_level_enabled() {
+        let settings = super::fallback_logging_settings();
+        assert_eq!(settings.default_filter(), ksp_logging_lib::LogFilterLevel::Trace);
+    }
+}
diff --git a/crates/ksp-app-backfill-desk/src/constants.rs b/crates/ksp-app-backfill-desk/src/constants.rs
index af2cc21..0d3c3ef 100644
--- a/crates/ksp-app-backfill-desk/src/constants.rs
+++ b/crates/ksp-app-backfill-desk/src/constants.rs
@@ -1,8 +1,14 @@
 // file: crates/ksp-app-backfill-desk/src/constants.rs
-// version: 1
+// version: 2
 
 //! Application-owned tracing targets and domains.
 
+/// Composite component identifier for Logging.
+pub(crate) const COMPOSITE_COMPONENT_ID_LOGGING: &str = "logging";
+/// Composite component identifier for Store.
+pub(crate) const COMPOSITE_COMPONENT_ID_STORE: &str = "store";
+/// Composite component identifier for Transport.
+pub(crate) const COMPOSITE_COMPONENT_ID_TRANSPORT: &str = "transport";
 /// Structured domain used while bootstrapping Config and Logging.
 pub(crate) const TRACING_DOMAIN_BOOTSTRAP: &str = "backfill.bootstrap";
 /// Structured domain used by technical frontend events.
diff --git a/crates/ksp-app-backfill-desk/src/errors.rs b/crates/ksp-app-backfill-desk/src/errors.rs
index 70607ec..6eac950 100644
--- a/crates/ksp-app-backfill-desk/src/errors.rs
+++ b/crates/ksp-app-backfill-desk/src/errors.rs
@@ -1,8 +1,10 @@
 // file: crates/ksp-app-backfill-desk/src/errors.rs
-// version: 1
+// version: 2
 
 //! Application-local error codes for Backfill Desk composition and desktop runtime surfaces.
 
+/// Backfill Desk composite configuration is missing or references an unexpected document.
+pub(crate) const ERROR_CODE_CONFIG_COMPOSITE_INVALID: ksp_core_lib::ErrorCode = ksp_core_lib::ErrorCode::new("backfill_desk", "config_composite_invalid");
 /// Shared Backfill Desk runtime state is internally inconsistent.
 pub(crate) const ERROR_CODE_APP_STATE_INVALID: ksp_core_lib::ErrorCode = ksp_core_lib::ErrorCode::new("backfill_desk", "app_state_invalid");
 /// Shared Backfill Desk runtime state cannot be locked safely.
diff --git a/crates/ksp-app-backfill-desk/src/lib.rs b/crates/ksp-app-backfill-desk/src/lib.rs
index 23d11b5..58546be 100644
--- a/crates/ksp-app-backfill-desk/src/lib.rs
+++ b/crates/ksp-app-backfill-desk/src/lib.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-app-backfill-desk/src/lib.rs
-// version: 1
+// version: 2
 
 //! Tauri desktop application scaffold for controlling and inspecting KSP RAW backfill jobs.
 
@@ -28,8 +28,18 @@ pub(crate) use self::app_state::AppState;
 pub(crate) use self::bootstrap::LoggingStartup;
 /// Builds the Config management facade from the common KSP CLI bootstrap contract.
 pub(crate) use self::bootstrap::config_management;
-/// Initializes the scaffold Logging runtime from standard Config, with a bounded in-memory fallback.
+/// Initializes Logging from the Backfill Desk composite, with a trace-level development fallback.
 pub(crate) use self::bootstrap::initialize_logging;
+/// Loads the concrete Backfill Desk Config composite.
+pub(crate) use self::bootstrap::load_backfill_desk_composite;
+/// Returns one required component profile from the Backfill Desk composite.
+pub(crate) use self::bootstrap::required_composite_component_profile;
+/// Composite component identifier for Logging.
+pub(crate) use self::constants::COMPOSITE_COMPONENT_ID_LOGGING;
+/// Composite component identifier for Store.
+pub(crate) use self::constants::COMPOSITE_COMPONENT_ID_STORE;
+/// Composite component identifier for Transport.
+pub(crate) use self::constants::COMPOSITE_COMPONENT_ID_TRANSPORT;
 /// Structured domain used while bootstrapping Config and Logging.
 pub(crate) use self::constants::TRACING_DOMAIN_BOOTSTRAP;
 /// Structured domain used by technical frontend events.
@@ -54,6 +64,8 @@ pub(crate) use self::dto_common::ShellStatusDto;
 pub(crate) use self::errors::ERROR_CODE_APP_STATE_INVALID;
 /// Shared Backfill Desk runtime state cannot be locked safely.
 pub(crate) use self::errors::ERROR_CODE_APP_STATE_LOCK_FAILED;
+/// Backfill Desk composite configuration is missing or references an unexpected document.
+pub(crate) use self::errors::ERROR_CODE_CONFIG_COMPOSITE_INVALID;
 /// Frontend logging requested an unsupported level.
 pub(crate) use self::errors::ERROR_CODE_FRONTEND_LOG_LEVEL_INVALID;
 /// Frontend logging requested a target outside the application whitelist.
diff --git a/crates/ksp-app-backfill-desk/src/tauri.rs b/crates/ksp-app-backfill-desk/src/tauri.rs
index 28c63cb..68e89bf 100644
--- a/crates/ksp-app-backfill-desk/src/tauri.rs
+++ b/crates/ksp-app-backfill-desk/src/tauri.rs
@@ -1,11 +1,16 @@
 // file: crates/ksp-app-backfill-desk/src/tauri.rs
-// version: 1
+// version: 2
 
 //! Tauri runtime assembly for the KSP Backfill desktop application.
 
 /// Runs the Backfill desktop application.
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run(arguments: &[std::ffi::OsString]) -> ksp_core_lib::Result<()> {
+    let context = tauri::generate_context!();
+    let runtime_layout = configure_packaged_runtime(&context);
+    if let std::result::Result::Err(error) = runtime_layout {
+        return std::result::Result::Err(error);
+    }
     let app_state = crate::AppState::initialize(arguments);
     let app_state = match app_state {
         std::result::Result::Ok(value) => value,
@@ -16,7 +21,7 @@ pub fn run(arguments: &[std::ffi::OsString]) -> ksp_core_lib::Result<()> {
     builder = configure_plugins(builder);
     builder = configure_commands(builder);
     builder = configure_setup(builder);
-    let run_result = builder.run(tauri::generate_context!());
+    let run_result = builder.run(context);
     return match run_result {
         std::result::Result::Ok(()) => std::result::Result::Ok(()),
         std::result::Result::Err(error) => std::result::Result::Err(
@@ -26,6 +31,36 @@ pub fn run(arguments: &[std::ffi::OsString]) -> ksp_core_lib::Result<()> {
     };
 }
 
+fn configure_packaged_runtime(context: &tauri::Context<tauri::Wry>) -> ksp_core_lib::Result<()> {
+    if cfg!(debug_assertions) {
+        return std::result::Result::Ok(());
+    }
+    let resource_root = tauri::utils::platform::resource_dir(context.package_info(), &tauri::Env::default());
+    let resource_root = match resource_root {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(error) => {
+            return std::result::Result::Err(
+                ksp_core_lib::Error::new(crate::ERROR_CODE_TAURI_RUNTIME_FAILED, "Cannot resolve packaged Tauri resource directory")
+                    .with_context("tauri_error", error.to_string()),
+            );
+        },
+    };
+    let layout = ksp_config_lib::prepare_packaged_runtime(resource_root.as_path());
+    let layout = match layout {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(error) => return std::result::Result::Err(error),
+    };
+    let working_directory = std::env::set_current_dir(layout.runtime_root());
+    return match working_directory {
+        std::result::Result::Ok(()) => std::result::Result::Ok(()),
+        std::result::Result::Err(error) => std::result::Result::Err(
+            ksp_core_lib::Error::new(crate::ERROR_CODE_TAURI_RUNTIME_FAILED, "Cannot activate packaged KSP runtime directory")
+                .with_context("runtime_root", layout.runtime_root().to_string_lossy().into_owned())
+                .with_source(error),
+        ),
+    };
+}
+
 fn configure_state(builder: tauri::Builder<tauri::Wry>, app_state: crate::AppState) -> tauri::Builder<tauri::Wry> {
     return builder.manage(app_state);
 }
diff --git a/crates/ksp-app-backfill-desk/tauri.conf.json b/crates/ksp-app-backfill-desk/tauri.conf.json
index d58ae8f..7d6bde4 100644
--- a/crates/ksp-app-backfill-desk/tauri.conf.json
+++ b/crates/ksp-app-backfill-desk/tauri.conf.json
@@ -50,6 +50,22 @@
         "icon": [
             "icons/favicon.png",
             "icons/favicon.ico"
-        ]
+        ],
+        "resources": {
+            "../../config/composite.ksp-app-backfill-desk.json": "config/composite.ksp-app-backfill-desk.json",
+            "../../config/composite.ksp-app-solprices-desk.json": "config/composite.ksp-app-solprices-desk.json",
+            "../../config/composite.ksp-app-wallet-desk.json": "config/composite.ksp-app-wallet-desk.json",
+            "../../config/std.logging.json": "config/std.logging.json",
+            "../../config/std.offchain_transport.json": "config/std.offchain_transport.json",
+            "../../config/std.store.json": "config/std.store.json",
+            "../../config/std.transport.json": "config/std.transport.json",
+            "../../config/std.wallet.json": "config/std.wallet.json",
+            "../../config/schemas/composite.schema.json": "config/schemas/composite.schema.json",
+            "../../config/schemas/std.logging.schema.json": "config/schemas/std.logging.schema.json",
+            "../../config/schemas/std.offchain_transport.schema.json": "config/schemas/std.offchain_transport.schema.json",
+            "../../config/schemas/std.store.schema.json": "config/schemas/std.store.schema.json",
+            "../../config/schemas/std.transport.schema.json": "config/schemas/std.transport.schema.json",
+            "../../config/schemas/std.wallet.schema.json": "config/schemas/std.wallet.schema.json"
+        }
     }
 }
diff --git a/crates/ksp-app-backfill-desk/tests/config_composition.rs b/crates/ksp-app-backfill-desk/tests/config_composition.rs
new file mode 100644
index 0000000..52867cd
--- /dev/null
+++ b/crates/ksp-app-backfill-desk/tests/config_composition.rs
@@ -0,0 +1,88 @@
+// file: crates/ksp-app-backfill-desk/tests/config_composition.rs
+// version: 1
+
+//! Config composite contracts for Backfill Desk pre.003.
+
+#![forbid(unsafe_code)]
+#![deny(unreachable_pub)]
+#![warn(missing_docs)]
+
+fn workspace_engine() -> ksp_core_lib::Result<ksp_config_lib::ConfigDocumentEngine> {
+    let workspace = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../..");
+    let bootstrap = ksp_config_lib::ConfigBootstrapOptions::from_paths(workspace.join("config"), workspace.join("config/schemas"));
+    let bootstrap = match bootstrap {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(error) => return std::result::Result::Err(error),
+    };
+    let registry = ksp_config_lib::ConfigFileRegistry::defaults();
+    return match registry {
+        std::result::Result::Ok(value) => std::result::Result::Ok(ksp_config_lib::ConfigDocumentEngine::new(bootstrap, value)),
+        std::result::Result::Err(error) => std::result::Result::Err(error),
+    };
+}
+
+fn assert_component(composite: &ksp_config_lib::ResolvedConfigComposite, component_id: &str, file_id: &str, profile_id: &str) {
+    let component = composite.component(component_id);
+    assert!(component.is_some(), "missing component {component_id}");
+    if let std::option::Option::Some(component) = component {
+        assert_eq!(component.resolved().file_id().as_str(), file_id);
+        assert_eq!(component.resolved().profile_id(), profile_id);
+        assert_eq!(component.resolved().selection_source(), ksp_config_lib::ConfigProfileSelectionSource::Composite);
+    }
+}
+
+#[test]
+fn pre_003_default_composite_selects_trace_devnet_logging_transport_and_store() {
+    let engine = workspace_engine();
+    assert!(engine.is_ok(), "workspace Config engine should be constructible: {engine:?}");
+    let engine = match engine {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(_) => return,
+    };
+    let file_id = ksp_config_lib::ConfigFileId::new(ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK);
+    assert!(file_id.is_ok(), "Backfill Desk composite file_id should be valid: {file_id:?}");
+    let file_id = match file_id {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(_) => return,
+    };
+    let composite = engine.load_resolved_composite(&file_id, std::option::Option::None);
+    assert!(composite.is_ok(), "committed Backfill Desk composite should resolve: {composite:?}");
+    if let std::result::Result::Ok(composite) = composite {
+        assert_eq!(composite.profile_id(), "devnet");
+        assert_component(&composite, "logging", ksp_config_lib::FILE_ID_STD_LOGGING, "supertrace");
+        assert_component(&composite, "transport", ksp_config_lib::FILE_ID_STD_TRANSPORT, "devnet_public");
+        assert_component(&composite, "store", ksp_config_lib::FILE_ID_STD_STORE, "devnet");
+        let logging = composite.component("logging");
+        assert!(logging.is_some(), "Backfill Desk composite should expose Logging");
+        if let std::option::Option::Some(logging) = logging {
+            assert_eq!(logging.resolved().profile().get("default_filter").and_then(serde_json::Value::as_str), std::option::Option::Some("trace"));
+        }
+    }
+}
+
+#[test]
+fn pre_003_named_profiles_keep_transport_and_store_network_selection_paired() {
+    let engine = workspace_engine();
+    assert!(engine.is_ok(), "workspace Config engine should be constructible: {engine:?}");
+    let engine = match engine {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(_) => return,
+    };
+    let file_id = ksp_config_lib::ConfigFileId::new(ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK);
+    let file_id = match file_id {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(_) => return,
+    };
+    for (profile_id, logging_profile, transport_profile, store_profile) in
+        [("mainnet", "console_info", "mainnet_public", "mainnet"), ("testnet", "console_info", "publicnode_testnet", "testnet")]
+    {
+        let composite = engine.load_resolved_composite(&file_id, std::option::Option::Some(profile_id));
+        assert!(composite.is_ok(), "Backfill Desk composite profile {profile_id} should resolve: {composite:?}");
+        if let std::result::Result::Ok(composite) = composite {
+            assert_eq!(composite.profile_id(), profile_id);
+            assert_component(&composite, "logging", ksp_config_lib::FILE_ID_STD_LOGGING, logging_profile);
+            assert_component(&composite, "transport", ksp_config_lib::FILE_ID_STD_TRANSPORT, transport_profile);
+            assert_component(&composite, "store", ksp_config_lib::FILE_ID_STD_STORE, store_profile);
+        }
+    }
+}
diff --git a/crates/ksp-app-backfill-desk/tests/desktop_contract.rs b/crates/ksp-app-backfill-desk/tests/desktop_contract.rs
index d5c768d..72e1bb6 100644
--- a/crates/ksp-app-backfill-desk/tests/desktop_contract.rs
+++ b/crates/ksp-app-backfill-desk/tests/desktop_contract.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-app-backfill-desk/tests/desktop_contract.rs
-// version: 1
+// version: 2
 
 //! Structural desktop contract checks for the Backfill Desk scaffold.
 
@@ -24,6 +24,16 @@ fn read_text(path: &std::path::Path) -> String {
     };
 }
 
+fn read_json(path: &std::path::Path) -> serde_json::Value {
+    let source = read_text(path);
+    let parsed = serde_json::from_str(source.as_str());
+    assert!(parsed.is_ok(), "unable to parse {}", path.display());
+    return match parsed {
+        std::result::Result::Ok(value) => value,
+        std::result::Result::Err(_) => serde_json::Value::Null,
+    };
+}
+
 fn read_bytes(path: &std::path::Path) -> std::vec::Vec<u8> {
     let source = std::fs::read(path);
     assert!(source.is_ok(), "unable to read {}", path.display());
@@ -119,3 +129,52 @@ fn pre_002_shell_and_splash_use_shared_frontend_tooling() {
     assert!(splash.contains("Splash opacity animation started"));
     assert!(splash.contains("Backfill Desk splash frontend loaded"));
 }
+
+#[test]
+fn pre_003_composite_packaging_follows_atomic_config_registry_contract() {
+    let root = app_root();
+    let config = read_json(root.join("tauri.conf.json").as_path());
+    let resources = config.get("bundle").and_then(|value| value.get("resources")).and_then(serde_json::Value::as_object);
+    assert!(resources.is_some());
+    let resources = match resources {
+        std::option::Option::Some(value) => value,
+        std::option::Option::None => return,
+    };
+    assert_eq!(resources.len(), 14);
+    for required in [
+        "../../config/composite.ksp-app-backfill-desk.json",
+        "../../config/composite.ksp-app-solprices-desk.json",
+        "../../config/composite.ksp-app-wallet-desk.json",
+        "../../config/std.logging.json",
+        "../../config/std.offchain_transport.json",
+        "../../config/std.store.json",
+        "../../config/std.transport.json",
+        "../../config/std.wallet.json",
+        "../../config/schemas/composite.schema.json",
+        "../../config/schemas/std.logging.schema.json",
+        "../../config/schemas/std.offchain_transport.schema.json",
+        "../../config/schemas/std.store.schema.json",
+        "../../config/schemas/std.transport.schema.json",
+        "../../config/schemas/std.wallet.schema.json",
+    ] {
+        assert!(resources.contains_key(required), "missing packaged Config resource {required}");
+    }
+    let tauri = read_text(root.join("src/tauri.rs").as_path());
+    assert!(tauri.contains("prepare_packaged_runtime"));
+    assert!(tauri.contains("resource_dir"));
+    assert!(tauri.contains("set_current_dir"));
+}
+
+#[test]
+fn pre_003_bootstrap_uses_composite_logging_without_opening_transport_or_store() {
+    let root = app_root();
+    let bootstrap = read_text(root.join("src/bootstrap.rs").as_path());
+    assert!(bootstrap.contains("FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK"));
+    assert!(bootstrap.contains("COMPOSITE_COMPONENT_ID_LOGGING"));
+    assert!(bootstrap.contains("COMPOSITE_COMPONENT_ID_TRANSPORT"));
+    assert!(bootstrap.contains("COMPOSITE_COMPONENT_ID_STORE"));
+    assert!(bootstrap.contains("LogFilterLevel::Trace"));
+    for forbidden in ["HttpTransportPool", "Store::open", "BackfillJobRuntime", "BackfillRequest"] {
+        assert!(!bootstrap.contains(forbidden), "pre.003 opens later runtime surface {forbidden}");
+    }
+}
diff --git a/crates/ksp-app-backfill-desk/tests/desktop_security.rs b/crates/ksp-app-backfill-desk/tests/desktop_security.rs
index e13821c..3652192 100644
--- a/crates/ksp-app-backfill-desk/tests/desktop_security.rs
+++ b/crates/ksp-app-backfill-desk/tests/desktop_security.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-app-backfill-desk/tests/desktop_security.rs
-// version: 1
+// version: 2
 
 //! Security and dependency-boundary checks for the Backfill Desk scaffold.
 
@@ -113,3 +113,17 @@ fn pre_002_frontend_instrumentation_avoids_business_or_secret_payloads() {
         assert!(!main.contains(forbidden));
     }
 }
+
+#[test]
+fn pre_003_keeps_config_only_composition_boundary() {
+    let root = app_root();
+    let manifest = read_text(root.join("Cargo.toml").as_path());
+    assert!(manifest.contains("ksp-config-lib.workspace = true"));
+    for forbidden in ["ksp-job-backfill-lib", "ksp-onchain-transport-lib", "ksp-store-lib", "ksp-store-api", "ksp-store-postgres-lib"] {
+        assert!(!manifest.contains(forbidden), "pre.003 opens a later-layer dependency: {forbidden}");
+    }
+    let bootstrap = read_text(root.join("src/bootstrap.rs").as_path());
+    assert!(bootstrap.contains("LogFilterLevel::Trace"));
+    assert!(!bootstrap.contains("HttpTransportPool"));
+    assert!(!bootstrap.contains("Store::open"));
+}
diff --git a/crates/ksp-app-config-desk/tauri.conf.json b/crates/ksp-app-config-desk/tauri.conf.json
index d733515..d4be766 100644
--- a/crates/ksp-app-config-desk/tauri.conf.json
+++ b/crates/ksp-app-config-desk/tauri.conf.json
@@ -52,6 +52,7 @@
             "icons/favicon.ico"
         ],
         "resources": {
+            "../../config/composite.ksp-app-backfill-desk.json": "config/composite.ksp-app-backfill-desk.json",
             "../../config/composite.ksp-app-solprices-desk.json": "config/composite.ksp-app-solprices-desk.json",
             "../../config/composite.ksp-app-wallet-desk.json": "config/composite.ksp-app-wallet-desk.json",
             "../../config/std.logging.json": "config/std.logging.json",
diff --git a/crates/ksp-app-config-desk/tests/desktop_contract.rs b/crates/ksp-app-config-desk/tests/desktop_contract.rs
index 253dc48..765f598 100644
--- a/crates/ksp-app-config-desk/tests/desktop_contract.rs
+++ b/crates/ksp-app-config-desk/tests/desktop_contract.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-app-config-desk/tests/desktop_contract.rs
-// version: 11
+// version: 12
 
 //! Desktop build/shell contract audits for Config Desk.
 
@@ -110,7 +110,11 @@ fn pre_018_packaged_runtime_bundles_config_resources_and_activates_shared_writab
     let resources = tauri.pointer("/bundle/resources").and_then(serde_json::Value::as_object);
     assert!(resources.is_some(), "packaged Config resources map must exist");
     if let std::option::Option::Some(resources) = resources {
-        assert_eq!(resources.len(), 13);
+        assert_eq!(resources.len(), 14);
+        assert_eq!(
+            resources.get("../../config/composite.ksp-app-backfill-desk.json").and_then(serde_json::Value::as_str),
+            std::option::Option::Some("config/composite.ksp-app-backfill-desk.json"),
+        );
         assert_eq!(
             resources.get("../../config/composite.ksp-app-solprices-desk.json").and_then(serde_json::Value::as_str),
             std::option::Option::Some("config/composite.ksp-app-solprices-desk.json"),
diff --git a/crates/ksp-app-solprices-desk/tauri.conf.json b/crates/ksp-app-solprices-desk/tauri.conf.json
index ffe398e..aca4a3a 100644
--- a/crates/ksp-app-solprices-desk/tauri.conf.json
+++ b/crates/ksp-app-solprices-desk/tauri.conf.json
@@ -52,6 +52,7 @@
             "icons/favicon.ico"
         ],
         "resources": {
+            "../../config/composite.ksp-app-backfill-desk.json": "config/composite.ksp-app-backfill-desk.json",
             "../../config/composite.ksp-app-solprices-desk.json": "config/composite.ksp-app-solprices-desk.json",
             "../../config/composite.ksp-app-wallet-desk.json": "config/composite.ksp-app-wallet-desk.json",
             "../../config/std.logging.json": "config/std.logging.json",
diff --git a/crates/ksp-app-solprices-desk/tests/desktop_contract.rs b/crates/ksp-app-solprices-desk/tests/desktop_contract.rs
index bf30b86..d3d34a8 100644
--- a/crates/ksp-app-solprices-desk/tests/desktop_contract.rs
+++ b/crates/ksp-app-solprices-desk/tests/desktop_contract.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-app-solprices-desk/tests/desktop_contract.rs
-// version: 10
+// version: 11
 
 //! Desktop scaffold, shared-template and Config packaging contract audits for SOL Prices Desk `0.2.12`.
 
@@ -85,13 +85,17 @@ fn pre_002_package_is_mixed_lib_bin_and_frontend_is_scaffold_only() {
 }
 
 #[test]
-fn pre_004_packaging_contains_current_thirteen_config_resources() {
+fn pre_004_packaging_contains_current_fourteen_config_resources() {
     let root = app_root();
     let tauri = read_json(root.join("tauri.conf.json").as_path());
     let resources = tauri.pointer("/bundle/resources").and_then(serde_json::Value::as_object);
     assert!(resources.is_some());
     if let std::option::Option::Some(resources) = resources {
-        assert_eq!(resources.len(), 13);
+        assert_eq!(resources.len(), 14);
+        assert_eq!(
+            resources.get("../../config/composite.ksp-app-backfill-desk.json").and_then(serde_json::Value::as_str),
+            std::option::Option::Some("config/composite.ksp-app-backfill-desk.json"),
+        );
         assert_eq!(
             resources.get("../../config/composite.ksp-app-solprices-desk.json").and_then(serde_json::Value::as_str),
             std::option::Option::Some("config/composite.ksp-app-solprices-desk.json"),
diff --git a/crates/ksp-app-wallet-desk/tauri.conf.json b/crates/ksp-app-wallet-desk/tauri.conf.json
index 50b3477..23b1907 100644
--- a/crates/ksp-app-wallet-desk/tauri.conf.json
+++ b/crates/ksp-app-wallet-desk/tauri.conf.json
@@ -52,6 +52,7 @@
             "icons/favicon.ico"
         ],
         "resources": {
+            "../../config/composite.ksp-app-backfill-desk.json": "config/composite.ksp-app-backfill-desk.json",
             "../../config/composite.ksp-app-solprices-desk.json": "config/composite.ksp-app-solprices-desk.json",
             "../../config/composite.ksp-app-wallet-desk.json": "config/composite.ksp-app-wallet-desk.json",
             "../../config/std.logging.json": "config/std.logging.json",
diff --git a/crates/ksp-app-wallet-desk/tests/desktop_contract.rs b/crates/ksp-app-wallet-desk/tests/desktop_contract.rs
index 231c16a..199ca20 100644
--- a/crates/ksp-app-wallet-desk/tests/desktop_contract.rs
+++ b/crates/ksp-app-wallet-desk/tests/desktop_contract.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-app-wallet-desk/tests/desktop_contract.rs
-// version: 31
+// version: 32
 
 //! Desktop build, shell and Config-status contract audits for Wallet Desk.
 
@@ -432,7 +432,11 @@ fn pre_018_packaged_runtime_bundles_config_resources_and_keeps_wallet_desk_versi
     let resources = tauri.pointer("/bundle/resources").and_then(serde_json::Value::as_object);
     assert!(resources.is_some(), "packaged Wallet Desk Config resources map must exist");
     if let std::option::Option::Some(resources) = resources {
-        assert_eq!(resources.len(), 13);
+        assert_eq!(resources.len(), 14);
+        assert_eq!(
+            resources.get("../../config/composite.ksp-app-backfill-desk.json").and_then(serde_json::Value::as_str),
+            std::option::Option::Some("config/composite.ksp-app-backfill-desk.json"),
+        );
         assert_eq!(
             resources.get("../../config/composite.ksp-app-solprices-desk.json").and_then(serde_json::Value::as_str),
             std::option::Option::Some("config/composite.ksp-app-solprices-desk.json"),
diff --git a/crates/ksp-app-wallet-desk/tests/release_compliance.rs b/crates/ksp-app-wallet-desk/tests/release_compliance.rs
index fe92280..08184ce 100644
--- a/crates/ksp-app-wallet-desk/tests/release_compliance.rs
+++ b/crates/ksp-app-wallet-desk/tests/release_compliance.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-app-wallet-desk/tests/release_compliance.rs
-// version: 10
+// version: 11
 
 //! Release-wide deterministic compliance canaries for Wallet Desk.
 
@@ -199,7 +199,7 @@ fn packaged_resources_include_only_registered_config_sources_and_schemas() {
         std::option::Option::Some(value) => value,
         std::option::Option::None => return,
     };
-    assert_eq!(resources.len(), 13);
+    assert_eq!(resources.len(), 14);
     for (source, destination) in resources {
         let destination = destination.as_str();
         assert!(destination.is_some(), "resource destination must be textual");
diff --git a/crates/ksp-config-lib/src/lib.rs b/crates/ksp-config-lib/src/lib.rs
index fe68215..afe95b1 100644
--- a/crates/ksp-config-lib/src/lib.rs
+++ b/crates/ksp-config-lib/src/lib.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-config-lib/src/lib.rs
-// version: 21
+// version: 22
 
 #![warn(missing_docs)]
 #![deny(unreachable_pub)]
@@ -151,6 +151,8 @@ pub use self::registry::ConfigFileId;
 pub use self::registry::ConfigFileKind;
 /// Registry of KSP-known logical Config files and their replaceable physical filenames.
 pub use self::registry::ConfigFileRegistry;
+/// Default physical filename for the Backfill Desk composite configuration document.
+pub use self::registry::DEFAULT_COMPOSITE_KSP_APP_BACKFILL_DESK_FILENAME;
 /// Default physical filename for the SOL Prices Desk composite configuration document.
 pub use self::registry::DEFAULT_COMPOSITE_KSP_APP_SOLPRICES_DESK_FILENAME;
 /// Default physical filename for the Wallet Desk composite configuration document.
@@ -177,6 +179,8 @@ pub use self::registry::DEFAULT_STD_TRANSPORT_SCHEMA_FILENAME;
 pub use self::registry::DEFAULT_STD_WALLET_FILENAME;
 /// Default physical filename for the standard Wallet JSON Schema document.
 pub use self::registry::DEFAULT_STD_WALLET_SCHEMA_FILENAME;
+/// Logical file identifier for the Backfill Desk composite configuration document.
+pub use self::registry::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK;
 /// Logical file identifier for the SOL Prices Desk composite configuration document.
 pub use self::registry::FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK;
 /// Logical file identifier for the Wallet Desk composite configuration document.
diff --git a/crates/ksp-config-lib/src/registry.rs b/crates/ksp-config-lib/src/registry.rs
index 3eda52b..206e950 100644
--- a/crates/ksp-config-lib/src/registry.rs
+++ b/crates/ksp-config-lib/src/registry.rs
@@ -1,8 +1,10 @@
 // file: crates/ksp-config-lib/src/registry.rs
-// version: 13
+// version: 14
 
 /// Bootstrap argument used to replace a known Config filename mapping.
 pub const ARG_FILE_MAP: &str = "--filemap";
+/// Default physical filename for the Backfill Desk composite configuration document.
+pub const DEFAULT_COMPOSITE_KSP_APP_BACKFILL_DESK_FILENAME: &str = "composite.ksp-app-backfill-desk.json";
 /// Default physical filename for the SOL Prices Desk composite configuration document.
 pub const DEFAULT_COMPOSITE_KSP_APP_SOLPRICES_DESK_FILENAME: &str = "composite.ksp-app-solprices-desk.json";
 /// Default physical filename for the Wallet Desk composite configuration document.
@@ -29,6 +31,8 @@ pub const DEFAULT_STD_TRANSPORT_SCHEMA_FILENAME: &str = "std.transport.schema.js
 pub const DEFAULT_STD_WALLET_FILENAME: &str = "std.wallet.json";
 /// Default physical filename for the standard Wallet JSON Schema document.
 pub const DEFAULT_STD_WALLET_SCHEMA_FILENAME: &str = "std.wallet.schema.json";
+/// Logical file identifier for the Backfill Desk composite configuration document.
+pub const FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK: &str = "cfg.composite.ksp-app-backfill-desk";
 /// Logical file identifier for the SOL Prices Desk composite configuration document.
 pub const FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK: &str = "cfg.composite.ksp-app-solprices-desk";
 /// Logical file identifier for the Wallet Desk composite configuration document.
@@ -160,6 +164,16 @@ pub struct ConfigFileRegistry {
 impl ConfigFileRegistry {
     /// Creates the registry containing the KSP default file mappings known in the current release.
     pub fn defaults() -> ksp_core_lib::Result<Self> {
+        let backfill_composite = ConfigFileDescriptor::new(
+            FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK,
+            ConfigFileKind::Config,
+            DEFAULT_COMPOSITE_KSP_APP_BACKFILL_DESK_FILENAME,
+            std::option::Option::Some(FILE_ID_SCHEMA_COMPOSITE),
+        );
+        let backfill_composite = match backfill_composite {
+            std::result::Result::Ok(value) => value,
+            std::result::Result::Err(error) => return std::result::Result::Err(error),
+        };
         let solprices_composite = ConfigFileDescriptor::new(
             FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK,
             ConfigFileKind::Config,
@@ -271,6 +285,7 @@ impl ConfigFileRegistry {
             std::result::Result::Err(error) => return std::result::Result::Err(error),
         };
         return crate::build_registry([
+            backfill_composite,
             solprices_composite,
             wallet_composite,
             composite_schema,
diff --git a/crates/ksp-config-lib/tests/public_api.rs b/crates/ksp-config-lib/tests/public_api.rs
index d69d1c5..8f50ddd 100644
--- a/crates/ksp-config-lib/tests/public_api.rs
+++ b/crates/ksp-config-lib/tests/public_api.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-config-lib/tests/public_api.rs
-// version: 26
+// version: 27
 
 //! Integration tests for the public `ksp-config-lib` bootstrap, registry, JSON/profile/composite, environment-resolution, sensitivity,
 //! Logging/Transport/Store adapters and management contracts.
@@ -80,21 +80,22 @@ fn registry_descriptor_inventory_is_available_from_crate_root() {
     assert!(registry.is_ok(), "public registry should remain constructible: {registry:?}");
     if let std::result::Result::Ok(registry) = registry {
         let descriptors: std::vec::Vec<&ksp_config_lib::ConfigFileDescriptor> = registry.descriptors().collect();
-        assert_eq!(descriptors.len(), 13);
-        assert_eq!(descriptors[0].file_id().as_str(), ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK);
-        assert_eq!(descriptors[1].file_id().as_str(), ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_WALLET_DESK);
-        assert_eq!(descriptors[2].file_id().as_str(), ksp_config_lib::FILE_ID_STD_LOGGING);
-        assert_eq!(descriptors[3].file_id().as_str(), ksp_config_lib::FILE_ID_STD_OFFCHAIN_TRANSPORT);
-        assert_eq!(descriptors[4].file_id().as_str(), ksp_config_lib::FILE_ID_STD_STORE);
-        assert_eq!(descriptors[5].file_id().as_str(), ksp_config_lib::FILE_ID_STD_TRANSPORT);
-        assert_eq!(descriptors[6].file_id().as_str(), ksp_config_lib::FILE_ID_STD_WALLET);
-        assert_eq!(descriptors[7].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_COMPOSITE);
-        assert_eq!(descriptors[8].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_LOGGING);
-        assert_eq!(descriptors[9].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_OFFCHAIN_TRANSPORT);
-        assert_eq!(descriptors[10].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_STORE);
-        assert_eq!(descriptors[11].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_TRANSPORT);
-        assert_eq!(descriptors[12].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_WALLET);
-        let schema_file_id = descriptors[6].schema_file_id();
+        assert_eq!(descriptors.len(), 14);
+        assert_eq!(descriptors[0].file_id().as_str(), ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK);
+        assert_eq!(descriptors[1].file_id().as_str(), ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK);
+        assert_eq!(descriptors[2].file_id().as_str(), ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_WALLET_DESK);
+        assert_eq!(descriptors[3].file_id().as_str(), ksp_config_lib::FILE_ID_STD_LOGGING);
+        assert_eq!(descriptors[4].file_id().as_str(), ksp_config_lib::FILE_ID_STD_OFFCHAIN_TRANSPORT);
+        assert_eq!(descriptors[5].file_id().as_str(), ksp_config_lib::FILE_ID_STD_STORE);
+        assert_eq!(descriptors[6].file_id().as_str(), ksp_config_lib::FILE_ID_STD_TRANSPORT);
+        assert_eq!(descriptors[7].file_id().as_str(), ksp_config_lib::FILE_ID_STD_WALLET);
+        assert_eq!(descriptors[8].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_COMPOSITE);
+        assert_eq!(descriptors[9].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_LOGGING);
+        assert_eq!(descriptors[10].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_OFFCHAIN_TRANSPORT);
+        assert_eq!(descriptors[11].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_STORE);
+        assert_eq!(descriptors[12].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_TRANSPORT);
+        assert_eq!(descriptors[13].file_id().as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_WALLET);
+        let schema_file_id = descriptors[7].schema_file_id();
         assert!(schema_file_id.is_some(), "public Wallet descriptor should preserve schema association");
         if let std::option::Option::Some(schema_file_id) = schema_file_id {
             assert_eq!(schema_file_id.as_str(), ksp_config_lib::FILE_ID_SCHEMA_STD_WALLET);
@@ -163,6 +164,8 @@ fn composite_schema_and_provenance_contracts_are_available_from_crate_root() {
             assert_eq!(descriptor.kind(), ksp_config_lib::ConfigFileKind::Schema);
         }
     }
+    assert_eq!(ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK, "cfg.composite.ksp-app-backfill-desk");
+    assert_eq!(ksp_config_lib::DEFAULT_COMPOSITE_KSP_APP_BACKFILL_DESK_FILENAME, "composite.ksp-app-backfill-desk.json");
     assert_eq!(ksp_config_lib::FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK, "cfg.composite.ksp-app-solprices-desk");
     assert_eq!(ksp_config_lib::DEFAULT_COMPOSITE_KSP_APP_SOLPRICES_DESK_FILENAME, "composite.ksp-app-solprices-desk.json");
     assert_ne!(ksp_config_lib::ConfigProfileSelectionSource::Composite, ksp_config_lib::ConfigProfileSelectionSource::Explicit);
diff --git a/crates/ksp-config-lib/unit_tests/fixtures/composite.ksp-app-backfill-desk.json b/crates/ksp-config-lib/unit_tests/fixtures/composite.ksp-app-backfill-desk.json
new file mode 100644
index 0000000..11a2914
--- /dev/null
+++ b/crates/ksp-config-lib/unit_tests/fixtures/composite.ksp-app-backfill-desk.json
@@ -0,0 +1,66 @@
+{
+    "format_version": 1,
+    "default_profile": "devnet",
+    "profiles": [
+        {
+            "profile_id": "devnet",
+            "documents": [
+                {
+                    "component_id": "logging",
+                    "file_id": "cfg.std.logging",
+                    "profile_id": "supertrace"
+                },
+                {
+                    "component_id": "transport",
+                    "file_id": "cfg.std.transport",
+                    "profile_id": "devnet_public"
+                },
+                {
+                    "component_id": "store",
+                    "file_id": "cfg.std.store",
+                    "profile_id": "devnet"
+                }
+            ]
+        },
+        {
+            "profile_id": "mainnet",
+            "documents": [
+                {
+                    "component_id": "logging",
+                    "file_id": "cfg.std.logging",
+                    "profile_id": "console_info"
+                },
+                {
+                    "component_id": "transport",
+                    "file_id": "cfg.std.transport",
+                    "profile_id": "mainnet_public"
+                },
+                {
+                    "component_id": "store",
+                    "file_id": "cfg.std.store",
+                    "profile_id": "mainnet"
+                }
+            ]
+        },
+        {
+            "profile_id": "testnet",
+            "documents": [
+                {
+                    "component_id": "logging",
+                    "file_id": "cfg.std.logging",
+                    "profile_id": "console_info"
+                },
+                {
+                    "component_id": "transport",
+                    "file_id": "cfg.std.transport",
+                    "profile_id": "publicnode_testnet"
+                },
+                {
+                    "component_id": "store",
+                    "file_id": "cfg.std.store",
+                    "profile_id": "testnet"
+                }
+            ]
+        }
+    ]
+}
diff --git a/crates/ksp-config-lib/unit_tests/registry.rs b/crates/ksp-config-lib/unit_tests/registry.rs
index ec1ac66..bcbe38b 100644
--- a/crates/ksp-config-lib/unit_tests/registry.rs
+++ b/crates/ksp-config-lib/unit_tests/registry.rs
@@ -1,5 +1,5 @@
 // file: crates/ksp-config-lib/unit_tests/registry.rs
-// version: 11
+// version: 12
 
 #[test]
 fn descriptors_expose_complete_registry_in_deterministic_file_id_order() {
@@ -7,27 +7,27 @@ fn descriptors_expose_complete_registry_in_deterministic_file_id_order() {
     assert!(registry.is_ok(), "default registry should be valid: {registry:?}");
     if let std::result::Result::Ok(registry) = registry {
         let descriptors: std::vec::Vec<&crate::ConfigFileDescriptor> = registry.descriptors().collect();
-        assert_eq!(descriptors.len(), 13);
-        assert_eq!(descriptors[0].file_id().as_str(), crate::FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK);
-        assert_eq!(descriptors[0].filename(), std::path::Path::new(crate::DEFAULT_COMPOSITE_KSP_APP_SOLPRICES_DESK_FILENAME));
+        assert_eq!(descriptors.len(), 14);
+        assert_eq!(descriptors[0].file_id().as_str(), crate::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK);
+        assert_eq!(descriptors[0].filename(), std::path::Path::new(crate::DEFAULT_COMPOSITE_KSP_APP_BACKFILL_DESK_FILENAME));
         assert_eq!(descriptors[0].schema_file_id().map(crate::ConfigFileId::as_str), std::option::Option::Some(crate::FILE_ID_SCHEMA_COMPOSITE));
-        assert_eq!(descriptors[1].file_id().as_str(), crate::FILE_ID_COMPOSITE_KSP_APP_WALLET_DESK);
-        assert_eq!(descriptors[1].filename(), std::path::Path::new(crate::DEFAULT_COMPOSITE_KSP_APP_WALLET_DESK_FILENAME));
-        assert_eq!(descriptors[2].file_id().as_str(), crate::FILE_ID_STD_LOGGING);
-        assert_eq!(descriptors[3].file_id().as_str(), crate::FILE_ID_STD_OFFCHAIN_TRANSPORT);
-        assert_eq!(descriptors[4].file_id().as_str(), crate::FILE_ID_STD_STORE);
-        assert_eq!(descriptors[5].file_id().as_str(), crate::FILE_ID_STD_TRANSPORT);
-        assert_eq!(descriptors[6].file_id().as_str(), crate::FILE_ID_STD_WALLET);
-        assert_eq!(descriptors[6].filename(), std::path::Path::new(crate::DEFAULT_STD_WALLET_FILENAME));
-        assert_eq!(descriptors[6].schema_file_id().map(crate::ConfigFileId::as_str), std::option::Option::Some(crate::FILE_ID_SCHEMA_STD_WALLET));
-        assert_eq!(descriptors[7].file_id().as_str(), crate::FILE_ID_SCHEMA_COMPOSITE);
-        assert_eq!(descriptors[8].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_LOGGING);
-        assert_eq!(descriptors[9].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_OFFCHAIN_TRANSPORT);
-        assert_eq!(descriptors[10].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_STORE);
-        assert_eq!(descriptors[11].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_TRANSPORT);
-        assert_eq!(descriptors[12].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_WALLET);
-        assert!(descriptors[0..7].iter().all(|descriptor| return descriptor.kind() == crate::ConfigFileKind::Config));
-        assert!(descriptors[7..13].iter().all(|descriptor| return descriptor.kind() == crate::ConfigFileKind::Schema));
+        assert_eq!(descriptors[1].file_id().as_str(), crate::FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK);
+        assert_eq!(descriptors[2].file_id().as_str(), crate::FILE_ID_COMPOSITE_KSP_APP_WALLET_DESK);
+        assert_eq!(descriptors[3].file_id().as_str(), crate::FILE_ID_STD_LOGGING);
+        assert_eq!(descriptors[4].file_id().as_str(), crate::FILE_ID_STD_OFFCHAIN_TRANSPORT);
+        assert_eq!(descriptors[5].file_id().as_str(), crate::FILE_ID_STD_STORE);
+        assert_eq!(descriptors[6].file_id().as_str(), crate::FILE_ID_STD_TRANSPORT);
+        assert_eq!(descriptors[7].file_id().as_str(), crate::FILE_ID_STD_WALLET);
+        assert_eq!(descriptors[7].filename(), std::path::Path::new(crate::DEFAULT_STD_WALLET_FILENAME));
+        assert_eq!(descriptors[7].schema_file_id().map(crate::ConfigFileId::as_str), std::option::Option::Some(crate::FILE_ID_SCHEMA_STD_WALLET));
+        assert_eq!(descriptors[8].file_id().as_str(), crate::FILE_ID_SCHEMA_COMPOSITE);
+        assert_eq!(descriptors[9].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_LOGGING);
+        assert_eq!(descriptors[10].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_OFFCHAIN_TRANSPORT);
+        assert_eq!(descriptors[11].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_STORE);
+        assert_eq!(descriptors[12].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_TRANSPORT);
+        assert_eq!(descriptors[13].file_id().as_str(), crate::FILE_ID_SCHEMA_STD_WALLET);
+        assert!(descriptors[0..8].iter().all(|descriptor| return descriptor.kind() == crate::ConfigFileKind::Config));
+        assert!(descriptors[8..14].iter().all(|descriptor| return descriptor.kind() == crate::ConfigFileKind::Schema));
     }
 }
 
@@ -362,27 +362,41 @@ fn absolute_fixture_path() -> std::path::PathBuf {
 }
 
 #[test]
-fn defaults_register_generic_composite_schema_and_both_runtime_composites() {
+fn defaults_register_generic_composite_schema_and_three_runtime_composites() {
     let registry = crate::ConfigFileRegistry::defaults();
     let schema_id = crate::ConfigFileId::new(crate::FILE_ID_SCHEMA_COMPOSITE);
+    let backfill_id = crate::ConfigFileId::new(crate::FILE_ID_COMPOSITE_KSP_APP_BACKFILL_DESK);
     let solprices_id = crate::ConfigFileId::new(crate::FILE_ID_COMPOSITE_KSP_APP_SOLPRICES_DESK);
     let wallet_id = crate::ConfigFileId::new(crate::FILE_ID_COMPOSITE_KSP_APP_WALLET_DESK);
     assert!(registry.is_ok(), "default registry should be valid: {registry:?}");
     assert!(schema_id.is_ok(), "composite schema file_id should be valid: {schema_id:?}");
+    assert!(backfill_id.is_ok(), "Backfill Desk composite runtime file_id should be valid: {backfill_id:?}");
     assert!(solprices_id.is_ok(), "SOL Prices Desk composite runtime file_id should be valid: {solprices_id:?}");
     assert!(wallet_id.is_ok(), "Wallet Desk composite runtime file_id should be valid: {wallet_id:?}");
-    if let (std::result::Result::Ok(registry), std::result::Result::Ok(schema_id), std::result::Result::Ok(solprices_id), std::result::Result::Ok(wallet_id)) =
-        (registry, schema_id, solprices_id, wallet_id)
+    if let (
+        std::result::Result::Ok(registry),
+        std::result::Result::Ok(schema_id),
+        std::result::Result::Ok(backfill_id),
+        std::result::Result::Ok(solprices_id),
+        std::result::Result::Ok(wallet_id),
+    ) = (registry, schema_id, backfill_id, solprices_id, wallet_id)
     {
         let schema = registry.descriptor(&schema_id);
+        let backfill = registry.descriptor(&backfill_id);
         let solprices = registry.descriptor(&solprices_id);
         let wallet = registry.descriptor(&wallet_id);
         assert!(schema.is_ok(), "generic composite schema should be registered: {schema:?}");
+        assert!(backfill.is_ok(), "Backfill Desk runtime composite should be registered: {backfill:?}");
         assert!(solprices.is_ok(), "SOL Prices Desk runtime composite should be registered: {solprices:?}");
         assert!(wallet.is_ok(), "Wallet Desk runtime composite should be registered: {wallet:?}");
-        if let (std::result::Result::Ok(schema), std::result::Result::Ok(solprices), std::result::Result::Ok(wallet)) = (schema, solprices, wallet) {
+        if let (std::result::Result::Ok(schema), std::result::Result::Ok(backfill), std::result::Result::Ok(solprices), std::result::Result::Ok(wallet)) =
+            (schema, backfill, solprices, wallet)
+        {
             assert_eq!(schema.kind(), crate::ConfigFileKind::Schema);
             assert_eq!(schema.filename(), std::path::Path::new(crate::DEFAULT_COMPOSITE_SCHEMA_FILENAME));
+            assert_eq!(backfill.kind(), crate::ConfigFileKind::Config);
+            assert_eq!(backfill.filename(), std::path::Path::new(crate::DEFAULT_COMPOSITE_KSP_APP_BACKFILL_DESK_FILENAME));
+            assert_eq!(backfill.schema_file_id(), std::option::Option::Some(&schema_id));
             assert_eq!(solprices.kind(), crate::ConfigFileKind::Config);
             assert_eq!(solprices.filename(), std::path::Path::new(crate::DEFAULT_COMPOSITE_KSP_APP_SOLPRICES_DESK_FILENAME));
             assert_eq!(solprices.schema_file_id(), std::option::Option::Some(&schema_id));
diff --git a/deltas/0.3.7/pre.003.md b/deltas/0.3.7/pre.003.md
new file mode 100644
index 0000000..9e7b216
--- /dev/null
+++ b/deltas/0.3.7/pre.003.md
@@ -0,0 +1,83 @@
+<!-- file: deltas/0.3.7/pre.003.md -->
+<!-- version: 1 -->
+
+# Delta 0.3.7-pre.003 — Config composite et packaging Backfill Desk
+
+## Base
+
+`0.3.7-pre.002` validée par le gate opérateur fourni : audits Rust/Markdown, `cargo check --workspace`, Clippy et tests `ksp-app-backfill-desk` propres.
+
+## Objectif
+
+Introduire le composite Config de Backfill Desk, brancher son bootstrap Config/Logging et le packaging release, tout en conservant Transport, Store et Backfill runtime fermés. Pendant le développement du Desk, rendre son tracing volontairement verbeux via `supertrace` sur le profil `devnet` et `trace` pour le fallback local.
+
+## Fichiers ajoutés
+
+- `config/composite.ksp-app-backfill-desk.json` ;
+- `crates/ksp-config-lib/unit_tests/fixtures/composite.ksp-app-backfill-desk.json` ;
+- `crates/ksp-app-backfill-desk/tests/config_composition.rs` ;
+- `deltas/0.3.7/pre.003.md`.
+
+## Fichiers modifiés
+
+- `Cargo.toml` ;
+- `crates/ksp-config-lib/src/lib.rs` ;
+- `crates/ksp-config-lib/src/registry.rs` ;
+- `crates/ksp-config-lib/tests/public_api.rs` ;
+- `crates/ksp-config-lib/unit_tests/registry.rs` ;
+- `crates/ksp-app-backfill-desk/src/bootstrap.rs` ;
+- `crates/ksp-app-backfill-desk/src/constants.rs` ;
+- `crates/ksp-app-backfill-desk/src/errors.rs` ;
+- `crates/ksp-app-backfill-desk/src/lib.rs` ;
+- `crates/ksp-app-backfill-desk/src/tauri.rs` ;
+- `crates/ksp-app-backfill-desk/tauri.conf.json` ;
+- `crates/ksp-app-backfill-desk/tests/desktop_contract.rs` ;
+- `crates/ksp-app-backfill-desk/tests/desktop_security.rs` ;
+- `crates/ksp-app-config-desk/tauri.conf.json` ;
+- `crates/ksp-app-config-desk/tests/desktop_contract.rs` ;
+- `crates/ksp-app-solprices-desk/tauri.conf.json` ;
+- `crates/ksp-app-solprices-desk/tests/desktop_contract.rs` ;
+- `crates/ksp-app-wallet-desk/tauri.conf.json` ;
+- `crates/ksp-app-wallet-desk/tests/desktop_contract.rs` ;
+- `crates/ksp-app-wallet-desk/tests/release_compliance.rs` ;
+- `docs/plans/028-V0_3_7_BACKFILL_DESK_PLAN.md` ;
+- `docs/validation/024-V0_3_7_BACKFILL_DESK.md`.
+
+## Fichiers supprimés
+
+Aucun.
+
+## Décisions
+
+- Le composite Backfill Desk possède `devnet`, `mainnet` et `testnet`, avec `devnet` par défaut.
+- `devnet` sélectionne Logging `supertrace`; le fallback local de Backfill Desk utilise `LogFilterLevel::Trace` pendant le développement. Aucun niveau des autres Desk n'est modifié.
+- Le bootstrap valide les composants Logging/Transport/Store mais ne résout que Logging en `pre.003`; Transport et Store restent fermés jusqu'aux tranches prévues.
+- `prepare_packaged_runtime()` traverse tout le registre Config. L'ajout du composite porte ce registre à 14 descriptors : les quatre Desk embarquent donc atomiquement les 14 resources Config/schema.
+- La présence de documents Wallet/offchain dans le bundle Backfill satisfait uniquement le contrat de packaging partagé ; elle ne crée ni dépendance Rust ni capability frontend correspondante.
+
+## Validations exécutées
+
+- `python3 scripts/audit_rust_workspace_rules.py` : propre, zéro candidat d'export ;
+- `python3 scripts/audit_markdown_tables.py README.md RULES.md ROADMAP.md CHANGELOG.md docs prompts crates deltas/0.3.7` : propre, 270 tableaux / 150 fichiers ;
+- parsing JSON : 7 manifests/resources contrôlés ;
+- parsing TOML : `Cargo.toml` racine et manifeste Backfill Desk contrôlés ;
+- validation JSON Schema : composite source et fixture conformes à `composite.schema.json` ;
+- profils composite : `devnet/mainnet/testnet` et sélections Logging/Transport/Store exacts ;
+- packaging : 14/14 resources Config/schema identiques dans les quatre Desk ;
+- frontend : dépendances minimales et `devDependencies` du gabarit préservées ;
+- tracing développement : `supertrace` via le composite `devnet`, `Trace` en fallback ;
+- frontière `pre.003` : aucune dépendance/runtime Transport, Store ou Backfill ouverte.
+- diff `pre.002 -> pre.003` : 4 fichiers ajoutés, 22 fichiers modifiés, aucune suppression.
+
+## Validations non exécutées
+
+- `cargo fmt --all` ;
+- `cargo check --workspace` ;
+- `cargo clippy --workspace --all-targets` ;
+- suites Cargo de `ksp-config-lib` et des quatre Desk.
+
+L'exécutable `cargo`/`rustfmt` n'est pas disponible dans le sandbox d'assemblage.
+
+## Questions ouvertes
+
+Aucune question bloquante. Le niveau de tracing verbeux est explicitement temporaire pour la phase de développement et devra être réévalué avant la publication stable.
diff --git a/docs/plans/028-V0_3_7_BACKFILL_DESK_PLAN.md b/docs/plans/028-V0_3_7_BACKFILL_DESK_PLAN.md
index 655587e..53a1246 100644
--- a/docs/plans/028-V0_3_7_BACKFILL_DESK_PLAN.md
+++ b/docs/plans/028-V0_3_7_BACKFILL_DESK_PLAN.md
@@ -1,5 +1,5 @@
 <!-- file: docs/plans/028-V0_3_7_BACKFILL_DESK_PLAN.md -->
-<!-- version: 2 -->
+<!-- version: 3 -->
 
 # Plan v0.3.7 — Backfill Desk
 
@@ -148,7 +148,7 @@ Au bootstrap, l'application charge le composite, résout Logging/Transport/Store
 
 Les rôles présentés à l'UI sont dérivés des snapshots/settings Transport, dédupliqués, puis validés côté Rust comme capables de sélectionner à la fois `getSignaturesForAddress` et `getTransaction`. Le rôle `default` est actuellement le seul rôle des profils standard, mais il n'est pas codé en dur comme contrat du Desk.
 
-Les resources bundle minimales sont le composite Backfill Desk, `std.logging.json`, `std.transport.json`, `std.store.json` et leurs schemas, plus `composite.schema.json`. Les documents Wallet/offchain ne sont pas embarqués sans besoin démontré.
+Le packaging Config suit le contrat atomique déjà détenu par `ksp-config-lib::prepare_packaged_runtime()` : il traverse l'intégralité de `ConfigFileRegistry::defaults()`. L'ajout du composite Backfill Desk fait donc passer le registre de 13 à 14 descriptors et impose que les quatre applications Desk qui utilisent ce packaging embarquent les 14 resources Config/schema du registre. Backfill Desk embarque ainsi également les documents Wallet/offchain sans les consommer au runtime ; leur présence satisfait le contrat de packaging partagé et n'ouvre aucune dépendance, permission frontend ou responsabilité métier supplémentaire.
 
 ## 8. Dependency map
 
@@ -235,7 +235,7 @@ Créer package lib+bin, shell/splash/tracing/capability, frontend minimal, ports
 
 ### pre.003 — Config composite et packaging
 
-Ajouter composite Backfill Desk, resources minimales, bootstrap Config/Logging et canaries packaging/composition sans encore ouvrir réseau/Store réel.
+Ajouter le composite Backfill Desk et l'enregistrer dans Config, mettre à jour atomiquement les quatre bundles Desk vers les 14 resources du registre, puis brancher le bootstrap Config/Logging et ses canaries sans encore ouvrir Transport/Store réel. Pendant le développement de l'application, `devnet` sélectionne le profil Logging `supertrace` et le fallback local Backfill Desk reste au niveau `trace`; ce choix est local au Desk et devra être resserré avant publication stable.
 
 ### pre.004 — Transport readiness
 
diff --git a/docs/validation/024-V0_3_7_BACKFILL_DESK.md b/docs/validation/024-V0_3_7_BACKFILL_DESK.md
index b6a3542..7cd2d6a 100644
--- a/docs/validation/024-V0_3_7_BACKFILL_DESK.md
+++ b/docs/validation/024-V0_3_7_BACKFILL_DESK.md
@@ -1,5 +1,5 @@
 <!-- file: docs/validation/024-V0_3_7_BACKFILL_DESK.md -->
-<!-- version: 2 -->
+<!-- version: 3 -->
 
 # Validation v0.3.7 — Backfill Desk
 
@@ -95,7 +95,7 @@ Le journal opérateur fourni rapporte `cargo clean`, `cargo fmt`, audits Rust/Ma
 - [ ] Package Rust lib + bin conforme.
 - [ ] Ports Vite/HMR 1436/1437 stricts.
 - [ ] Splash/main + tracing conformes.
-- [ ] Composite Backfill Desk packagé et valide.
+- [X] Composite Backfill Desk packagé et valide.
 - [ ] Transport readiness et role inventory sûrs.
 - [ ] Store readiness et cohérence réseau.
 - [ ] Quatre scopes + commitments + bornes mappés.
@@ -135,3 +135,33 @@ Contraintes de gabarit vérifiées statiquement : mêmes assets splash/logo/DOS
 - [ ] typecheck npm complet / build Tauri : non exécutés dans le sandbox.
 
 Le contrôle TypeScript local est syntaxique avec le compilateur global disponible ; il ne remplace pas le typecheck complet avec dépendances npm et bindings TS-RS générés. Toute correction révélée par le gate opérateur reste dans la lane `pre.002-fix.NNN`.
+
+## 10. pre.003 — composite Config et packaging
+
+Le composite `cfg.composite.ksp-app-backfill-desk` est enregistré dans `ksp-config-lib` avec `devnet` par défaut. Il sélectionne `supertrace + devnet_public + devnet`, tandis que `mainnet` et `testnet` conservent des couples Transport/Store cohérents. Le bootstrap Backfill Desk valide les trois composants requis mais ne résout encore que Logging : aucun `HttpTransportPool`, `Store::open`, `BackfillRequest` ou `BackfillJobRuntime` n'est ouvert dans cette tranche.
+
+Le niveau de développement est volontairement verbeux pour cette application : `devnet` utilise `supertrace`, et le fallback Logging propre à Backfill Desk utilise `LogFilterLevel::Trace`. Les autres applications Desk ne changent pas de profil Logging.
+
+La découverte du contrat réel de `prepare_packaged_runtime()` a réconcilié le plan : la fonction traverse tout `ConfigFileRegistry::defaults()`. Le registre compte désormais 14 descriptors, de sorte que Config Desk, Wallet Desk, SOL Prices Desk et Backfill Desk embarquent toutes les 14 resources Config/schema. Les documents Wallet/offchain présents dans le bundle Backfill ne sont pas consommés par son runtime et n'élargissent ni ses capabilities ni ses dépendances Rust.
+
+### Gate pre.002 opérateur acquis
+
+- [X] audits Rust et Markdown propres ;
+- [X] `cargo check --workspace` propre ;
+- [X] `cargo clippy --workspace --all-targets` propre ;
+- [X] `cargo test -p ksp-app-backfill-desk` : 12 unitaires + 5 desktop contract + 4 desktop security + 1 public API, aucun échec.
+
+### Gate statique local pre.003
+
+- [X] composite Backfill Desk ajouté au source Config et aux fixtures Config ;
+- [X] registre Config porté à 14 descriptors avec exports publics associés ;
+- [X] profils `devnet/mainnet/testnet` et références Logging/Transport/Store couplés conformément au plan ;
+- [X] les quatre `tauri.conf.json` Desk embarquent le registre Config complet de 14 resources ;
+- [X] release packaging Backfill Desk appelle `prepare_packaged_runtime()` avant l'initialisation applicative ;
+- [X] bootstrap Backfill valide Logging/Transport/Store puis ne résout que Logging ;
+- [X] niveau de développement Backfill Desk verrouillé à `supertrace` via Config et `trace` en fallback ;
+- [X] aucune dépendance `ksp-job-backfill-lib`, `ksp-onchain-transport-lib`, `ksp-store-lib` ou backend Store ajoutée au manifeste Backfill Desk ;
+- [X] audit Rust workspace propre, zéro candidat d'export ;
+- [X] audit Markdown propre : 270 tableaux / 150 fichiers ;
+- [X] parsing JSON/TOML, validation JSON Schema et audit structurel Config/package propres ;
+- [ ] `cargo fmt/check/clippy/test` pre.003 : à exécuter par l'opérateur, `cargo`/`rustfmt` absents du sandbox.