From 496e96b206b0a20306545b332a317293fa0ee42d Mon Sep 17 00:00:00 2001
From: Matt <47545907+SoundMatt@users.noreply.github.com>
Date: Tue, 28 Jul 2026 13:02:44 -0700
Subject: [PATCH] =?UTF-8?q?feat:=20v2.8.0=20=E2=80=94=20Fragmentation=20Go?=
 =?UTF-8?q?/No-Go=20Decision,=20formal=20close-out=20(milestone=2052)?=
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ROADMAP.md milestone 52 already stated the final call in prose (no-go for
this cycle), and every downstream consequence of that decision had already
landed in earlier milestones (uart.hpp, spi.hpp, can.hpp, wire.hpp,
.fusa-reqs.json all cite it as settled). This closes the milestone itself:

- rcp/regmap.hpp: fix the lone stale kOptFragmentation comment that still
  said "go/no-go pending" to match the already-decided no-go wording used
  everywhere else in the tree
- rcp/version.hpp / CMakeLists.txt: bump to 2.8.0
- ROADMAP.md: add the Done (v2.8.0) retrospective paragraph milestone 52
  was missing, cross-referencing where the decision's consequences already
  live

No wire-format, endpoint, or safety-mechanism behavior changes.

Signed-off-by: Matt <47545907+SoundMatt@users.noreply.github.com>
---
 CMakeLists.txt          |  2 +-
 ROADMAP.md              | 18 ++++++++++++++++++
 include/rcp/regmap.hpp  |  2 +-
 include/rcp/version.hpp |  2 +-
 4 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 229f568..6d574ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.21)
 
 project(cpp-rcp
-    VERSION 2.7.0
+    VERSION 2.8.0
     DESCRIPTION "Remote Control Protocol for automotive zonal architecture (C++)"
     HOMEPAGE_URL "https://github.com/SoundMatt/cpp-RCP"
     LANGUAGES CXX
diff --git a/ROADMAP.md b/ROADMAP.md
index 53f37b8..ba1d23c 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -698,6 +698,24 @@ still not claimed — see this file's own disclaimer pattern in
 
 ### 52. Fragmentation — Go/No-Go Decision (v2.8.0)
 
+**Done (v2.8.0):** this milestone's call was made in prose (below) before
+any of its downstream consequences landed, and every one of those
+consequences was already built and cross-referencing "ROADMAP.md milestone
+52" as settled fact by the time this close-out PR was opened: the
+single-AVTPDU UART RX-FIFO/`read_size` bound in `rcp/uart.hpp`, the
+equivalent SPI framing note in `rcp/spi.hpp`, the CAN XL
+`kMaxXlPayloadSingleAvtpdu` vs. `kMaxXlPayloadSpec` split in `rcp/can.hpp`,
+the `ms` ("more segments") field comment in `rcp/wire.hpp`, and the
+`REQ-UART-006`/`REQ-CANEP-004` traceability entries in `.fusa-reqs.json`.
+This milestone formally closes the decision itself: the
+`kOptFragmentation` bit comment in `rcp/regmap.hpp` — the one remaining
+place in the tree still describing the call as "pending" — now reads
+consistently with the rest of the codebase (reserved, never set, per this
+already-decided no-go), and `rcp::kVersion`/the CMake project version move
+to `2.8.0` to mark the milestone as landed. No wire-format, endpoint, or
+safety-mechanism behavior changes in this milestone — it is a documentation
+and version close-out only.
+
 **Decision: no-go for this cycle.** Fragmentation (the `ms`/`segment_num`
 mechanism for splitting one logical request/response across multiple
 AVTPDUs) is explicitly called out in the specification itself as optional
diff --git a/include/rcp/regmap.hpp b/include/rcp/regmap.hpp
index 5fe9f9a..bd18844 100644
--- a/include/rcp/regmap.hpp
+++ b/include/rcp/regmap.hpp
@@ -233,7 +233,7 @@ struct ResponseQueueConfig {
 
 constexpr uint32_t kOptConditionalRequests = 0x0000'0001; // compound/triggered/timed/chained requests (v2.5.0)
 constexpr uint32_t kOptSafetyRequests      = 0x0000'0002; // E2E CRC safe points + safety-request variants (v2.6.0)
-constexpr uint32_t kOptFragmentation       = 0x0000'0004; // multi-segment requests (v2.8.0, go/no-go pending)
+constexpr uint32_t kOptFragmentation       = 0x0000'0004; // multi-segment requests — bit reserved, never set: ROADMAP.md milestone 52's already-decided fragmentation no-go (v2.8.0)
 
 // ── TablePointer ──────────────────────────────────────────────────────────────
 // The pointer/capacity pair pattern used for each of the five bootstrap
diff --git a/include/rcp/version.hpp b/include/rcp/version.hpp
index ba8982b..6ad5580 100644
--- a/include/rcp/version.hpp
+++ b/include/rcp/version.hpp
@@ -6,6 +6,6 @@
 namespace rcp {
 
 // Semantic version of the cpp-RCP implementation (matches the latest git tag).
-constexpr std::string_view kVersion = "2.7.0";
+constexpr std::string_view kVersion = "2.8.0";
 
 } // namespace rcp