Wave 5+6: plugin ABI hardening, build modernization, ABI/security docs

Wave 5 (9 parallel agents):
- W1.1 atomic diag callback + DLL handle release on shutdown (lin)
- W2.1 unify cross-DLL heap discipline (host->alloc/free/strdup) (chen)
- W2.2 secure_zero api_key on shutdown for deepseek/anthropic (cao)
- W3 CMake modernization: target-based cxx_std_20, dstalk_boost_config
  INTERFACE lib, root-level RUNTIME_OUTPUT_DIRECTORY (hu)
- W4 GitHub Actions CI with dynamic Linux/Windows matrix (ma)
- W5.1 SSE buffer_body to cut peak memory ~67% on 32K streams (zhou)
- W6.1 LSP JSON-RPC frame parser hardened against header reordering (sun)
- W7 smoke test: copy plugin DLLs post-build + Boost.JSON src.hpp fix
  for full 9-plugin load coverage (wang)
- W8.1 README slimmed 398->92, Diataxis docs/ skeleton (deng)

Wave 6 (6 parallel agents):
- W9.1 docs/explanation: architecture + plugin-lifecycle (deng)
- W9.3 log credential leak audit (0 vulns, audit trail in
  docs/explanation/security-logging.md) (cao)
- W9.4 docs/reference/plugin-abi.md - 7-point ABI contract (lin)
- W9.6 CLI /history command + status integration (zhao)
- W9.8 plugin_loader fault tolerance: per-plugin failure no longer
  aborts dstalk_init (huang)
- W9.10 host_api unit tests: tests/host_api_test.cpp, 8 cases (liu)

CEO oversight (preexisting bugs fixed during Wave 5 verification):
- lsp_plugin.cpp:449 forward decl mismatch (int vs void)
- tools_plugin.cpp:109 missing forward decl

Multi-agent collaboration framework:
- agents/WORKFLOW.md: 6-stage protocol, two-tier governance,
  prompt template, technical constraints registry

Build: cmake --build 0 error / 0 warning. Tests: 2/2 100% pass.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

plugins/lsp/CMakeLists.txt

@@ -9,21 +9,11 @@ add_library(plugin-lsp SHARED
     src/lsp_plugin.cpp
 )
 
-target_include_directories(plugin-lsp PRIVATE
-    ${CMAKE_SOURCE_DIR}/dstalk-core/include
-)
-
 target_link_libraries(plugin-lsp PRIVATE dstalk)
 
 # Boost.JSON 用于 JSON-RPC 消息构建/解析
 find_package(Boost REQUIRED CONFIG)
-target_link_libraries(plugin-lsp PRIVATE boost::boost)
-
-target_compile_definitions(plugin-lsp PRIVATE
-    BOOST_ALL_NO_LIB
-    BOOST_ERROR_CODE_HEADER_ONLY
-    BOOST_JSON_HEADER_ONLY
-)
+target_link_libraries(plugin-lsp PRIVATE boost::boost dstalk_boost_config)
 
 # POSIX 平台需要 pthread (用于 std::thread)
 if(NOT WIN32)

plugins/lsp/src/lsp_plugin.cpp

@@ -9,6 +9,7 @@
 #include "dstalk/dstalk_services.h"
 
 #include <boost/json.hpp>
+#include <boost/json/src.hpp>
 
 #include <atomic>
 #include <chrono>
@@ -417,18 +418,33 @@ static void handle_message(const std::string& body) {
 
 static void reader_loop() {
     while (g_lsp.running) {
-        std::string header_line;
-        if (!g_lsp.proc.read_line(header_line)) break;
+        int content_length = -1;
+        bool pipe_ok = true;
 
-        int content_length = parse_content_length(header_line);
-        if (content_length < 0) continue;
-
-        // 跳过后续头直到空行 (\r\n 换行被视为非空行，只检查空行)
-        while (true) {
+        // 状态机式读取 header 块：循环 read_line 直到读到空行
+        // LSP 3.17: header 块以空行(\r\n)结束，允许 Content-Type 等其他 header
+        while (pipe_ok) {
             std::string line;
-            if (!g_lsp.proc.read_line(line)) break;
+            if (!g_lsp.proc.read_line(line)) {
+                pipe_ok = false;
+                break;
+            }
+
+            // header 块以空行结束
             auto sv = trim(std::string_view(line));
             if (sv.empty()) break;
+
+            // 累积 Content-Length；遇到其他 header 不丢弃，继续读取下一行
+            int len = parse_content_length(line);
+            if (len >= 0) content_length = len;
+        }
+
+        if (!pipe_ok) break;
+
+        // 空行前都没读到 Content-Length，协议错误——记日志并跳过这一帧
+        if (content_length < 0) {
+            if (g_host) g_host->log(DSTALK_LOG_ERROR, "[lsp] Invalid LSP frame: missing Content-Length header");
+            continue;
         }
 
         std::string body;
@@ -446,7 +462,7 @@ static void reader_loop() {
 // LSP 服务 vtable 实现 (定义在 vtable 变量之前)
 // ============================================================================
 
-static int g_lsp_impl_stop();
+static void g_lsp_impl_stop();
 
 static int g_lsp_impl_start(const char* server_cmd, const char* language) {
     if (!server_cmd || !server_cmd[0]) return -1;