Q-W6: registration table (OCP) in main.cpp; bank verbs -> shell/bank_ops(Session&); persist.h + wav_trim + namespaces.h shims deleted; 61/61

capture.h realtime seam split to capture_realtime_shell.h; GetProjExtState grow-loop rehomed to core/wire/ext_state_read; stale persist.cpp/bank_panel.cpp comment refs fixed; CLAUDE.md persist/bank_book/actions bullets updated. Command-id suffixes, display phrases, and undo labels byte-identical.

src/shell/instrument/reaper_bridge.cpp

@@ -1,4 +1,3 @@
-#include "core/namespaces.h"
 // reaper_bridge.cpp — see reaper_bridge.h. The DAW-facing edge; keep it thin.
 
 #include "shell/instrument/reaper_bridge.h"
@@ -6,6 +5,7 @@
 #include <vector>
 
 #include "core/instrument/map/bridge_marshal.h"
+#include "core/wire/ext_state_read.h"  // readProjExtStateGrowing (T2-04 grow-loop policy)
 #include "core/capture/capture_paths.h"  // projectDirOfRpp (shared M4 project-dir derivation)
 #include "ext_keys.h"       // kProjExtNamespace (shared wire contract)
 
@@ -39,6 +39,10 @@ DEF_CLASS_IID(Steinberg::IReaperHostApplication)
 
 namespace reasampler::vst {
 
+// Real-namespace-home using-declarations (Q-W6: the namespaces.h shim is retired).
+using capture::projectDirOfRpp;
+using instrument::map::decodeGetProjExtState;
+
 bool ReaperBridge::connect(Steinberg::FUnknown* context) {
     getProjExtState_ = nullptr;
     enumProjExtState_ = nullptr;
@@ -63,7 +67,8 @@ bool ReaperBridge::connect(Steinberg::FUnknown* context) {
     enumProjExtState_ = reinterpret_cast<EnumProjExtStateFn>(
         reaper->getReaperApi("EnumProjExtState"));
     // EnumProjects(-1, ...) yields the active project AND its .rpp path — the same call
-    // persist.cpp uses, so the instrument derives the project directory identically.
+    // the persist shell (ext_state_io.cpp) uses, so the instrument derives the project
+    // directory identically.
     enumProjects_ = reinterpret_cast<EnumProjectsFn>(
         reaper->getReaperApi("EnumProjects"));
     // pS-usage: the (prefix-guarded) usage publish write + the track-identity pair the
@@ -93,17 +98,17 @@ std::optional<std::string> ReaperBridge::readReasamplerExtState(const std::strin
 
     // GetProjExtState writes into a caller buffer; the bank blob can be large (many
     // samples), so grow the buffer until the value fits rather than risk a silent
-    // truncation. The retry policy is the SHARED pure
-    // instrument::map::readProjExtStateGrowing (Q-W5 rider T2-04 — one loop for the
+    // truncation. The retry policy is the SHARED pure wire::readProjExtStateGrowing
+    // (T2-04 — one loop for the
     // extension's persist/usage reads and this bridge read; the rules cannot drift):
     // absent (rv <= 0) and the >16 MB ceiling both fold to nullopt here, and a
     // complete value still runs through decodeGetProjExtState (the stale/empty-buffer
     // guard) exactly as before.
-    const auto read = instrument::map::readProjExtStateGrowing(
+    const auto read = wire::readProjExtStateGrowing(
         [&](char* buf, int cap) {
             return getProjExtState_(proj, kProjExtNamespace(), key.c_str(), buf, cap);
         });
-    if (read.status != instrument::map::GrowingExtStateRead::Status::Complete)
+    if (read.status != wire::GrowingExtStateRead::Status::Complete)
         return std::nullopt;  // absent / empty key, or pathologically large (>16 MB)
     return decodeGetProjExtState(read.apiReturn, read.value);
 }
@@ -147,7 +152,7 @@ std::string ReaperBridge::currentTrackGuid() {
 std::string ReaperBridge::activeProjectDir() {
     if (!enumProjects_) return {};
     // idx=-1 is the current project tab; the out-buffer receives the full .rpp path,
-    // EMPTY for a never-saved project. Same call + convention as persist.cpp; the pure
+    // EMPTY for a never-saved project. Same call + convention as the persist shell; the pure
     // projectDirOfRpp turns the .rpp path into the project directory (parent, forward-
     // slashed) and keeps an unsaved project's empty path empty (no default-location
     // fallback — the tool's invariant).