diff --git a/text12.txt b/text12.txt
index aeda68b..6db95b8 100644
--- a/text12.txt
+++ b/text12.txt
@@ -2086,3 +2086,88 @@ host_wasm_opfs_browser_smokes=ok
 继续推进 SDK/API surface。下一批建议为 shell/session handoff summary 增加 focused compatibility
 predicate 或 versioned summary schema（例如 `createIniPanelShellSessionHandoffSummarySchema()`），
 让外部 shell 能独立判断 summary shape 是否可消费；仍保持只读，不新增控制按钮，不解析 G-code。
+
+二十六、2026-06-15 继续执行记录：INI panel shell session handoff summary schema gate
+
+本轮按“第一原则：加快实质性推进”继续推进 SDK/API surface，为 shell/session handoff
+summary 增加 versioned schema 与 focused compatibility predicate，并暴露到真实 launch browser
+API，让外部 shell 能在消费 summary 前独立判断 shape 是否可支持。
+
+完成内容：
+
+- `ui-shell.js` 新增 `createIniPanelShellSessionHandoffSummarySchema()`；
+- `ui-shell.js` 新增 `isSupportedIniPanelShellSessionHandoffSummary()`；
+- `createIniPanelShellSessionHandoffSummary()` 新增：
+  - `apiName: "ini-panel-shell-session-handoff-summary"`；
+  - `summaryVersion: 1`；
+- `createIniPanelLaunchApiManifest().methods` 新增：
+  - `getShellSessionHandoffSummarySchema`；
+  - `isSupportedShellSessionHandoffSummary`；
+- `launch.html` 的 `window.linuxCncIniPanelLaunchApi` 新增：
+  - `getShellSessionHandoffSummarySchema()`；
+  - `isSupportedShellSessionHandoffSummary()`；
+- `ini_panel_launch_smoke.html` 在真实 launch iframe 中校验：
+  - summary schema version；
+  - 当前 summary 可支持；
+  - 错误 summary version 被拒绝；
+- `ini_panel_shell_integration_workflow_smoke.html` 在 browser shell handoff workflow 中校验：
+  - launch API 暴露 summary schema 与 predicate；
+  - 当前 handoff summary 可支持；
+- `verify_ini_panel_shell_integration_manifest.mjs` 覆盖：
+  - summary schema 完整 shape；
+  - valid summary 支持；
+  - 错误 version、错误 apiName、缺字段、null 被拒绝；
+- `verify_ini_panel_launch_api_manifest.mjs`、`verify_ini_panel_ui_shell.mjs`、
+  `verify_ini_panel_entry_docs.mjs` 与 `docs/panel-entry.md` 同步记录和校验新 API；
+- 未新增控制按钮；
+- 未解析 G-code；
+- 未解释 canonical events；
+- 未新增 JS CNC 语义；
+- 未改变 OPFS/session persistence、LinuxCNC interpreter、tool、parameter、planner 或
+  LinuxCNC-owned runtime semantics。
+
+验证已通过：
+
+```bash
+git diff --check
+wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_ui_shell.sh
+wasm-port/tests/ui/node/verify_ini_panel_entry_docs.sh
+wasm-port/tests/ui/node/verify_ui_node_smokes.sh
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_ini_panel_browser.sh
+wasm-port/tools/verify_vendor_sync.sh
+wasm-port/tools/verify_no_standalone_cnc_semantics.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_interp_wasm.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_sim_configs_inventory_wasm.sh
+wasm-port/tests/host/verify_host_smokes.sh
+```
+
+关键输出：
+
+```text
+ini_panel_shell_integration_manifest_node_smoke=ok
+ini_panel_launch_api_manifest_node_smoke=ok
+ini_panel_ui_shell_node_smoke=ok
+ini_panel_entry_docs_node_smoke=ok
+ui_node_smokes=ok
+browser_ini_opfs_smoke=ok
+browser_ini_control_page_smoke=ok
+browser_ini_launch_smoke=ok
+browser_ini_shell_integration_workflow_smoke=ok
+vendor sync up to date
+standalone CNC semantics guard complete
+interp_wasm_node_smoke=ok
+sim_configs_wasm_node_inventory_executed=28
+sim_configs_wasm_node_inventory_passed=28
+sim_configs_wasm_node_inventory_skipped=131
+sim_configs_wasm_node_inventory_unexpected_fail=0
+host_wasm_opfs_browser_smokes=ok
+```
+
+下一步建议：
+
+继续推进 SDK/API surface 与 browser/UI workflow 的交界。下一批建议增加一个
+`createIniPanelShellSessionHandoffCompatibilityReport()` 或等价 helper，把 summary schema
+支持状态、缺失字段、version/apiName mismatch 与 blocking reasons 合并成可显示报告，便于外部
+shell 在 UI 中解释为什么不能消费 handoff summary；仍保持只读，不新增控制按钮，不解析 G-code。
diff --git a/text13.txt b/text13.txt
new file mode 100644
index 0000000..85c79d6
--- /dev/null
+++ b/text13.txt
@@ -0,0 +1,509 @@
+项目整体完成情况与后续执行计划
+
+生成时间：2026-06-15 CST
+
+本文件接替 `text12.txt`。后续工作按 `text13.txt` 执行；除非明确要求审计旧记录，
+不要再回到 `text1/text2/text3/text4/text5/text6/text7/text8/text9/text10/text11/text12`
+扩展进度。`text12.txt` 作为历史归档保留。
+
+一、第一原则：加快实质性推进
+
+后续批次必须以“实质性能力优先”为第一遵守原则。
+
+1. 优先级从高到低：
+
+- OPFS/session persistence；
+- SDK/API surface；
+- browser/UI workflow；
+- sim config coverage promotion；
+- host/runtime boundary proof；
+- 文档化可执行工作流。
+
+2. 每批默认应产出至少一种可直接复用的能力：
+
+- 可调用 helper；
+- 可复用 API；
+- 可验证用户流程；
+- 可执行 gate；
+- 可提升覆盖面的 runtime boundary proof；
+- 能直接指导下一步实现的设计/清单。
+
+3. 暂停低收益推进：
+
+- 不再把“局部常量化、路径变量收敛、断言分组整理”作为主目标；
+- 只有当它支撑可复用 workflow/API/gate 时，才允许做测试胶水；
+- 禁止为了推进而扩大 CNC 语义边界；
+- 禁止启动性能测试，除非已有明确用户流程需要性能基线。
+
+4. LinuxCNC 仍是唯一 CNC 语义来源：
+
+- G-code、remap、tool、parameter、planner、kinematics、user-M、tool DB、Python remap
+  等语义必须来自 LinuxCNC upstream 或 vendored LinuxCNC C/C++/配置/脚本源码；
+- JS/browser 只允许做 build、source sync、runtime shim、filesystem staging、OPFS、
+  WASM/browser boundary、测试胶水、文档和机器可读 gate/artifact；
+- 不在 JS 中重写 G-code 或 CNC 语义；
+- 不修改 vendored LinuxCNC 源文件来让测试通过；
+- 不把 full-process/HAL/UI/Python/tool DB 依赖伪装成 standalone pass；
+- 不把 expected failure 硬改成 pass，除非已有 LinuxCNC-owned runtime proof，并且
+  native、Node、browser gate 都按顺序通过；
+- browser 不能依赖目录枚举。
+
+二、续接状态与防重规则
+
+1. 当前续接点。
+
+`text12.txt` 已推进到：
+
+```text
+二十六、2026-06-15 继续执行记录：INI panel shell session handoff summary schema gate
+```
+
+本文件从 `text13.txt` 重新开始记录后续进度。
+
+2. 每轮开始前必须先执行：
+
+```bash
+git status --short
+git log -5 --oneline
+tail -n 120 text13.txt
+awk '/^[一二三四五六七八九十百]+、/ {print}' text13.txt | sort | uniq -d
+```
+
+执行规则：
+
+- 如果 `git status --short` 是 clean，且最新提交已经包含当前建议工作，不要重复追加记录；
+- 每轮只追加一个新的中文编号记录；
+- 提交前再次检查标题唯一性；
+- `text13.txt` 只记录新的后续进度，不复制 `text12.txt` 的长历史；
+- 每批完成后，如果要写记录，先写 `text13.txt`，再提交该批代码和记录；
+- 如果发现重复记录，先做 dedupe 清理并提交，再继续新功能或新 guard；
+- `text12.txt` 不再追加新进度，除非明确要求审计或修正历史记录。
+
+三、当前完成情况摘要
+
+1. 当前工作树状态。
+
+切换到 `text13.txt` 时工作树包含上一批未提交改动：
+
+```text
+M text12.txt
+M wasm-port/docs/panel-entry.md
+M wasm-port/runtime/ui/ini-panel/launch.html
+M wasm-port/runtime/ui/ini-panel/ui-shell.js
+M wasm-port/tests/browser/ini_panel_launch_smoke.html
+M wasm-port/tests/browser/ini_panel_shell_integration_workflow_smoke.html
+M wasm-port/tests/ui/node/verify_ini_panel_entry_docs.mjs
+M wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.mjs
+M wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.mjs
+M wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs
+```
+
+上述改动对应 `text12.txt` 第 26 条：shell session handoff summary schema gate。
+
+2. 最近提交：
+
+```text
+01817f6 推进 INI 面板 shell handoff summary browser API
+b31b9a2 推进 INI 面板 shell session handoff summary
+ee665c4 推进 INI 面板 shell integration workflow plan
+a663c8d 推进 INI 面板 shell integration browser workflow smoke
+1f9a8c3 推进 INI 面板 shell integration readiness helper
+```
+
+3. 关键基线保持稳定。
+
+- `linuxcnc/nc_files` native Layer 1：
+  - `total 107`
+  - `pass 101`
+  - `expected_fail 6`
+  - `unexpected_fail 0`
+- `linuxcnc/configs/sim` native Layer 2：
+  - `total 159`
+  - `pass 151`
+  - `expected_fail 8`
+  - `unexpected_fail 0`
+- Node sim-config inventory：
+  - `executed=28`
+  - `passed=28`
+  - `skipped=131`
+  - `unexpected_fail=0`
+
+4. blocked runtime family 仍未 promotion。
+
+仍 blocked，不允许 promotion：
+
+- `L4-USER-M-PROCESS`
+- `L4-TOOL-DB`
+- `L4-PYTHON-REMAP`
+
+当前 host 仍按缺少 LinuxCNC host runtime 处理，不执行任何：
+
+```bash
+ENABLE_MILLTURN_USER_M_RUNTIME_PROBE=1 bash wasm-port/tests/native/probe_millturn_user_m_runtime.sh
+ENABLE_TOOL_DB_RUNTIME_PROBE=1 bash wasm-port/tests/native/probe_tool_db_runtime.sh
+ENABLE_PYTHON_REMAP_RUNTIME_PROBE=1 bash wasm-port/tests/native/probe_python_remap_runtime.sh
+```
+
+四、当前实质能力进展
+
+1. INI panel/UI helper 能力。
+
+当前 UI helper 已覆盖：
+
+- run summary；
+- run workflow；
+- session snapshot summary；
+- session load summary；
+- machine file save/load summary；
+- panel state summary；
+- session snapshot save/restore workflow；
+- entry manifest、launcher link view-model、shell view-model；
+- read-only control-page controller；
+- read-only control-page refresh workflow；
+- read-only control-page session readiness workflow；
+- shell integration readiness、workflow plan、session handoff summary；
+- shell session handoff summary versioned schema 与 compatibility predicate。
+
+当前聚合验证入口：
+
+```bash
+wasm-port/tests/ui/node/verify_ui_node_smokes.sh
+```
+
+2. Browser/UI workflow 验证。
+
+当前 browser INI panel smoke 覆盖真实 OPFS/session persistence workflow 与外部 shell handoff：
+
+```bash
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_ini_panel_browser.sh
+```
+
+关键输出：
+
+```text
+browser_ini_opfs_smoke=ok
+browser_ini_control_page_smoke=ok
+browser_ini_launch_smoke=ok
+browser_ini_shell_integration_workflow_smoke=ok
+```
+
+五、当前必须保持通过的验证入口
+
+每批后续改动至少运行：
+
+```bash
+git diff --check
+wasm-port/tools/verify_vendor_sync.sh
+wasm-port/tools/verify_no_standalone_cnc_semantics.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_interp_wasm.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_sim_configs_inventory_wasm.sh
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_ini_panel_browser.sh
+wasm-port/tests/ui/node/verify_ui_node_smokes.sh
+wasm-port/tests/host/verify_host_smokes.sh
+```
+
+如果涉及 browser interpreter smoke，再运行：
+
+```bash
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_interp_browser.sh
+```
+
+涉及 native baseline 或大范围 source/staging 改动时，再运行：
+
+```bash
+wasm-port/tests/native/verify_nc_files.sh
+wasm-port/tests/native/verify_sim_configs.sh
+```
+
+六、下一步建议
+
+继续推进 SDK/API surface 与 browser/UI workflow 的交界。下一批建议增加一个
+`createIniPanelShellSessionHandoffCompatibilityReport()` 或等价 helper，把 summary schema
+支持状态、缺失字段、version/apiName mismatch 与 blocking reasons 合并成可显示报告，便于外部
+shell 在 UI 中解释为什么不能消费 handoff summary；仍保持只读，不新增控制按钮，不解析 G-code。
+
+一、2026-06-15 继续执行记录：INI panel shell session handoff compatibility report
+
+本轮按“第一原则：加快实质性推进”创建 `text13.txt` 续接文件，并继续推进 SDK/API
+surface 与 browser/UI workflow 的交界：新增 shell session handoff compatibility report，让外部
+shell 能读取 display-ready 诊断，判断 handoff summary 是否可消费以及失败原因。
+
+完成内容：
+
+- 新建 `text13.txt`，接替 `text12.txt` 作为后续执行记录；
+- `ui-shell.js` 新增 `createIniPanelShellSessionHandoffCompatibilityReport()`；
+- compatibility report 输出：
+  - `apiName: "ini-panel-shell-session-handoff-compatibility-report"`；
+  - `reportVersion: 1`；
+  - `phase: "ready" | "blocked"`；
+  - `compatible`；
+  - `summarySupported`；
+  - `handoffReady`；
+  - `schema`；
+  - `summary`；
+  - `missingFields`；
+  - `mismatchFields`；
+  - `blockingReasons`；
+- `createIniPanelShellViewModel()` 新增：
+  - `shellSessionHandoffCompatibilityReport`；
+  - `createShellSessionHandoffCompatibilityReport`；
+- `createIniPanelLaunchApiManifest().methods` 新增
+  `getShellSessionHandoffCompatibilityReport`；
+- `launch.html` 的 `window.linuxCncIniPanelLaunchApi` 新增真实 browser 入口
+  `getShellSessionHandoffCompatibilityReport()`；
+- `ini_panel_launch_smoke.html` 校验真实 launch iframe 的 compatibility report：
+  - `compatible === true`；
+  - `summarySupported === true`；
+  - `missingFields` 为空；
+- `ini_panel_shell_integration_workflow_smoke.html` 校验外部 shell handoff workflow 能读取
+  compatibility report，并确认当前 report 无 blocking reasons；
+- `verify_ini_panel_shell_integration_manifest.mjs` 覆盖：
+  - ready report 完整 shape；
+  - 错误 `summaryVersion` 进入 `mismatchFields`；
+  - 缺字段进入 `missingFields`；
+  - `null` summary 返回完整缺字段列表；
+  - blocked workflow 的 `blockingReasons` 和 `compatible === false`；
+- `verify_ini_panel_launch_api_manifest.mjs`、`verify_ini_panel_ui_shell.mjs`、
+  `verify_ini_panel_entry_docs.mjs` 与 `docs/panel-entry.md` 同步记录和校验新 helper/API；
+- 未新增控制按钮；
+- 未解析 G-code；
+- 未解释 canonical events；
+- 未新增 JS CNC 语义；
+- 未改变 OPFS/session persistence、LinuxCNC interpreter、tool、parameter、planner 或
+  LinuxCNC-owned runtime semantics。
+
+验证已通过：
+
+```bash
+git diff --check
+wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_ui_shell.sh
+wasm-port/tests/ui/node/verify_ini_panel_entry_docs.sh
+wasm-port/tests/ui/node/verify_ui_node_smokes.sh
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_ini_panel_browser.sh
+wasm-port/tools/verify_vendor_sync.sh
+wasm-port/tools/verify_no_standalone_cnc_semantics.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_interp_wasm.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_sim_configs_inventory_wasm.sh
+wasm-port/tests/host/verify_host_smokes.sh
+```
+
+关键输出：
+
+```text
+ini_panel_shell_integration_manifest_node_smoke=ok
+ini_panel_launch_api_manifest_node_smoke=ok
+ini_panel_ui_shell_node_smoke=ok
+ini_panel_entry_docs_node_smoke=ok
+ui_node_smokes=ok
+browser_ini_opfs_smoke=ok
+browser_ini_control_page_smoke=ok
+browser_ini_launch_smoke=ok
+browser_ini_shell_integration_workflow_smoke=ok
+vendor sync up to date
+standalone CNC semantics guard complete
+interp_wasm_node_smoke=ok
+sim_configs_wasm_node_inventory_executed=28
+sim_configs_wasm_node_inventory_passed=28
+sim_configs_wasm_node_inventory_skipped=131
+sim_configs_wasm_node_inventory_unexpected_fail=0
+host_wasm_opfs_browser_smokes=ok
+```
+
+下一步建议：
+
+继续推进 browser/UI workflow。下一批建议把 compatibility report 用到一个真实的外部 shell
+display view-model 或 DOM smoke 中，让 launch 页面能直接展示 handoff 是否可消费、缺失字段和
+blocking reasons；仍保持只读，不新增控制按钮，不解析 G-code。
+
+二、2026-06-15 继续执行记录：INI panel shell handoff display view-model
+
+本轮按“第一原则：加快实质性推进”继续推进 browser/UI workflow，把上一批 compatibility
+report 接入可复用 display view-model 与真实 launch DOM，让外部 shell 能直接展示 handoff
+是否可消费、缺失字段、mismatch fields 与 blocking reasons。
+
+完成内容：
+
+- `ui-shell.js` 新增 `createIniPanelShellSessionHandoffDisplayViewModel()`；
+- display view-model 输出：
+  - `phase: "ready" | "blocked"`；
+  - `title`；
+  - `statusText`；
+  - `detailText`；
+  - `rows`；
+- `rows` 固定覆盖：
+  - `summary-supported`；
+  - `handoff-ready`；
+  - `missing-fields`；
+  - `mismatch-fields`；
+  - `blocking-reasons`；
+- `createIniPanelShellViewModel()` 新增：
+  - `shellSessionHandoffDisplayViewModel`；
+  - `createShellSessionHandoffDisplayViewModel`；
+- `createIniPanelLaunchApiManifest().methods` 新增
+  `getShellSessionHandoffDisplayViewModel`；
+- `launch.html` 的 `window.linuxCncIniPanelLaunchApi` 新增真实 browser 入口
+  `getShellSessionHandoffDisplayViewModel()`；
+- `launch.html` 新增只读 DOM 展示区域：
+  - `[data-handoff-status]`；
+  - `[data-handoff-rows]`；
+  - `[data-handoff-value="missing-fields"]`；
+  - `[data-handoff-value="blocking-reasons"]`；
+- `ini_panel_launch_smoke.html` 校验真实 launch iframe：
+  - display view-model `statusText === "Ready"`；
+  - display rows 数量为 5；
+  - DOM status 为 `Ready: No blocking reasons`；
+  - DOM missing fields 为 `none`；
+  - DOM blocking reasons 为 `none`；
+- `ini_panel_shell_integration_workflow_smoke.html` 校验外部 shell workflow 能读取
+  display view-model，并确认 display status/detail 与 compatibility report 一致；
+- `verify_ini_panel_shell_integration_manifest.mjs` 覆盖：
+  - ready display view-model 完整 shape；
+  - 错误 `summaryVersion` 显示到 `mismatch-fields` row；
+- `verify_ini_panel_ui_shell.mjs` 覆盖 shell view-model 的 display view-model shape；
+- `verify_ini_panel_launch_api_manifest.mjs`、`verify_ini_panel_entry_docs.mjs` 与
+  `docs/panel-entry.md` 同步记录和校验新 helper/API/DOM 节点；
+- 未新增控制按钮；
+- 未解析 G-code；
+- 未解释 canonical events；
+- 未新增 JS CNC 语义；
+- 未改变 OPFS/session persistence、LinuxCNC interpreter、tool、parameter、planner 或
+  LinuxCNC-owned runtime semantics。
+
+验证已通过：
+
+```bash
+git diff --check
+wasm-port/tests/ui/node/verify_ini_panel_ui_shell.sh
+wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_entry_docs.sh
+wasm-port/tests/ui/node/verify_ui_node_smokes.sh
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_ini_panel_browser.sh
+wasm-port/tools/verify_vendor_sync.sh
+wasm-port/tools/verify_no_standalone_cnc_semantics.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_interp_wasm.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_sim_configs_inventory_wasm.sh
+wasm-port/tests/host/verify_host_smokes.sh
+```
+
+关键输出：
+
+```text
+ini_panel_ui_shell_node_smoke=ok
+ini_panel_shell_integration_manifest_node_smoke=ok
+ini_panel_launch_api_manifest_node_smoke=ok
+ini_panel_entry_docs_node_smoke=ok
+ui_node_smokes=ok
+browser_ini_opfs_smoke=ok
+browser_ini_control_page_smoke=ok
+browser_ini_launch_smoke=ok
+browser_ini_shell_integration_workflow_smoke=ok
+vendor sync up to date
+standalone CNC semantics guard complete
+interp_wasm_node_smoke=ok
+sim_configs_wasm_node_inventory_executed=28
+sim_configs_wasm_node_inventory_passed=28
+sim_configs_wasm_node_inventory_skipped=131
+sim_configs_wasm_node_inventory_unexpected_fail=0
+host_wasm_opfs_browser_smokes=ok
+```
+
+下一步建议：
+
+继续推进 OPFS/session persistence 与 browser/UI workflow 的交界。下一批建议新增一个只读
+`createIniPanelShellSessionHandoffSnapshot()` 或等价 helper，把 integration readiness、handoff
+summary、compatibility report、display view-model 聚合成单次外部 shell snapshot API，减少外部
+shell 多次读取 launch API 的组合风险；仍保持只读，不新增控制按钮，不解析 G-code。
+
+三、2026-06-15 继续执行记录：INI panel shell handoff snapshot API
+
+本轮按“第一原则：加快实质性推进”继续推进 OPFS/session persistence 与 browser/UI workflow
+的交界，新增只读 shell handoff snapshot API，把 integration readiness、handoff summary、
+compatibility report 和 display view-model 聚合成单次外部 shell 读取。
+
+完成内容：
+
+- `ui-shell.js` 新增 `createIniPanelShellSessionHandoffSnapshot()`；
+- snapshot 输出：
+  - `apiName: "ini-panel-shell-session-handoff-snapshot"`；
+  - `snapshotVersion: 1`；
+  - `phase`；
+  - `ready`；
+  - `readiness`；
+  - `summary`；
+  - `compatibilityReport`；
+  - `displayViewModel`；
+- `createIniPanelShellViewModel()` 新增：
+  - `shellSessionHandoffSnapshot`；
+  - `createShellSessionHandoffSnapshot`；
+- `createIniPanelLaunchApiManifest().methods` 新增
+  `getShellSessionHandoffSnapshot`；
+- `launch.html` 的 `window.linuxCncIniPanelLaunchApi` 新增真实 browser 入口
+  `getShellSessionHandoffSnapshot()`；
+- `ini_panel_launch_smoke.html` 校验真实 launch iframe：
+  - snapshot version 为 1；
+  - snapshot `ready === true`；
+  - snapshot readiness 与独立 readiness API 一致；
+  - snapshot summary 与独立 summary API 一致；
+  - snapshot display view-model 与独立 display API 一致；
+- `ini_panel_shell_integration_workflow_smoke.html` 校验外部 shell workflow 能读取 snapshot，
+  并确认 snapshot display status 为 `Ready`；
+- `verify_ini_panel_shell_integration_manifest.mjs` 覆盖：
+  - ready snapshot 完整 shape；
+  - default snapshot 包含 5 个 display rows；
+- `verify_ini_panel_ui_shell.mjs` 覆盖 shell view-model 的 snapshot 聚合关系；
+- `verify_ini_panel_launch_api_manifest.mjs`、`verify_ini_panel_entry_docs.mjs` 与
+  `docs/panel-entry.md` 同步记录和校验新 helper/API；
+- 未新增控制按钮；
+- 未解析 G-code；
+- 未解释 canonical events；
+- 未新增 JS CNC 语义；
+- 未改变 OPFS/session persistence、LinuxCNC interpreter、tool、parameter、planner 或
+  LinuxCNC-owned runtime semantics。
+
+验证已通过：
+
+```bash
+git diff --check
+wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.sh
+wasm-port/tests/ui/node/verify_ini_panel_ui_shell.sh
+wasm-port/tests/ui/node/verify_ini_panel_entry_docs.sh
+wasm-port/tests/ui/node/verify_ui_node_smokes.sh
+SKIP_INI_BUILD=1 SKIP_INTERP_BUILD=1 wasm-port/tests/browser/verify_ini_panel_browser.sh
+wasm-port/tools/verify_vendor_sync.sh
+wasm-port/tools/verify_no_standalone_cnc_semantics.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_interp_wasm.sh
+SKIP_INTERP_BUILD=1 wasm-port/tests/wasm/node/verify_sim_configs_inventory_wasm.sh
+wasm-port/tests/host/verify_host_smokes.sh
+```
+
+关键输出：
+
+```text
+ini_panel_shell_integration_manifest_node_smoke=ok
+ini_panel_launch_api_manifest_node_smoke=ok
+ini_panel_ui_shell_node_smoke=ok
+ini_panel_entry_docs_node_smoke=ok
+ui_node_smokes=ok
+browser_ini_opfs_smoke=ok
+browser_ini_control_page_smoke=ok
+browser_ini_launch_smoke=ok
+browser_ini_shell_integration_workflow_smoke=ok
+vendor sync up to date
+standalone CNC semantics guard complete
+interp_wasm_node_smoke=ok
+sim_configs_wasm_node_inventory_executed=28
+sim_configs_wasm_node_inventory_passed=28
+sim_configs_wasm_node_inventory_skipped=131
+sim_configs_wasm_node_inventory_unexpected_fail=0
+host_wasm_opfs_browser_smokes=ok
+```
+
+下一步建议：
+
+继续推进 browser/UI workflow。下一批建议在 launch 页面或等价外部 shell view 中增加一个只读
+snapshot consumer helper，把 snapshot 直接压成 launch-side render state，并对 blocked snapshot
+做 focused browser smoke；仍保持只读，不新增控制按钮，不解析 G-code。
diff --git a/wasm-port/docs/panel-entry.md b/wasm-port/docs/panel-entry.md
index 1aa3f0e..756b6cd 100644
--- a/wasm-port/docs/panel-entry.md
+++ b/wasm-port/docs/panel-entry.md
@@ -21,7 +21,11 @@ import {
   createIniPanelShellIntegrationReadiness,
   createIniPanelShellIntegrationSchema,
   createIniPanelShellIntegrationWorkflowPlan,
+  createIniPanelShellSessionHandoffCompatibilityReport,
+  createIniPanelShellSessionHandoffDisplayViewModel,
+  createIniPanelShellSessionHandoffSnapshot,
   createIniPanelShellSessionHandoffSummary,
+  createIniPanelShellSessionHandoffSummarySchema,
   createIniPanelShellViewModel,
   getIniPanelEntryByHref,
   getVisibleIniPanelEntries,
@@ -37,6 +41,7 @@ import {
   isSupportedIniPanelControlPageApiManifest,
   isSupportedIniPanelLaunchApiManifest,
   isSupportedIniPanelShellIntegrationManifest,
+  isSupportedIniPanelShellSessionHandoffSummary,
 } from "../runtime/ui/ini-panel/ui-shell.js";
 ```
 
@@ -135,6 +140,25 @@ read-only display summary of readiness, target page, persistence capabilities,
 readonly status fields, handoff methods, and blocking reasons. Browser shells
 can read the same summary through
 `linuxCncIniPanelLaunchApi.getShellSessionHandoffSummary()`.
+Use `createIniPanelShellSessionHandoffSummarySchema()` or
+`linuxCncIniPanelLaunchApi.getShellSessionHandoffSummarySchema()` for the
+versioned summary shape, and `isSupportedIniPanelShellSessionHandoffSummary()`
+or `linuxCncIniPanelLaunchApi.isSupportedShellSessionHandoffSummary()` before
+consuming a summary from a browser shell.
+Use `createIniPanelShellSessionHandoffCompatibilityReport()` or
+`linuxCncIniPanelLaunchApi.getShellSessionHandoffCompatibilityReport()` when an
+outer shell needs display-ready diagnostics for schema support, missing fields,
+api/version mismatches, and current blocking reasons before consuming the
+handoff summary.
+Use `createIniPanelShellSessionHandoffDisplayViewModel()` or
+`linuxCncIniPanelLaunchApi.getShellSessionHandoffDisplayViewModel()` when an
+outer shell needs the same diagnostics as stable read-only label/value rows for
+DOM display. The launch page renders those rows in `[data-handoff-status]` and
+`[data-handoff-rows]` without adding control actions.
+Use `createIniPanelShellSessionHandoffSnapshot()` or
+`linuxCncIniPanelLaunchApi.getShellSessionHandoffSnapshot()` when an outer shell
+needs one read-only API read that includes readiness, handoff summary,
+compatibility report, and display view-model together.
 The browser workflow smoke
 `tests/browser/ini_panel_shell_integration_workflow_smoke.html` verifies the
 same external shell handoff: read integration manifest, pass readiness gate,
diff --git a/wasm-port/runtime/ui/ini-panel/launch.html b/wasm-port/runtime/ui/ini-panel/launch.html
index ffb071a..ebdb610 100644
--- a/wasm-port/runtime/ui/ini-panel/launch.html
+++ b/wasm-port/runtime/ui/ini-panel/launch.html
@@ -46,6 +46,27 @@
       display: grid;
       gap: 8px;
     }
+    .handoff-status {
+      border-top: 1px solid var(--border);
+      padding-top: 12px;
+      display: grid;
+      gap: 8px;
+    }
+    .handoff-status dl {
+      margin: 0;
+      display: grid;
+      grid-template-columns: minmax(120px, 180px) 1fr;
+      gap: 6px 12px;
+      font: 13px/1.4 "Segoe UI", "Noto Sans", sans-serif;
+    }
+    .handoff-status dt {
+      color: var(--muted);
+    }
+    .handoff-status dd {
+      margin: 0;
+      color: var(--text);
+      overflow-wrap: anywhere;
+    }
     a {
       color: var(--accent);
       text-decoration: none;
@@ -70,6 +91,10 @@
         <a data-entry-id="edit-run" href="./index.html">Open edit and run panel</a>
         <a data-entry-id="control-view" href="./control-page.html">Open read-only control view</a>
       </div>
+      <section class="handoff-status" aria-label="Shell handoff compatibility">
+        <p data-handoff-status>Checking shell handoff compatibility.</p>
+        <dl data-handoff-rows></dl>
+      </section>
     </section>
   </main>
   <script type="module">
@@ -89,6 +114,18 @@
       link.textContent = linkModel.label;
       link.href = linkModel.href;
     }
+    const handoffDisplay = shellViewModel.shellSessionHandoffDisplayViewModel;
+    document.querySelector("[data-handoff-status]").textContent = `${handoffDisplay.statusText}: ${handoffDisplay.detailText}`;
+    const handoffRows = document.querySelector("[data-handoff-rows]");
+    for (const row of handoffDisplay.rows) {
+      const term = document.createElement("dt");
+      term.dataset.handoffRow = row.id;
+      term.textContent = row.label;
+      const detail = document.createElement("dd");
+      detail.dataset.handoffValue = row.id;
+      detail.textContent = row.value;
+      handoffRows.append(term, detail);
+    }
 
     window.linuxCncIniPanelLaunchApi = {
       isSupportedLaunchApiManifest: isSupportedIniPanelLaunchApiManifest,
@@ -97,7 +134,12 @@
       getShellIntegrationSchema: () => shellViewModel.shellIntegrationSchema,
       getShellIntegrationManifest: () => shellViewModel.shellIntegrationManifest,
       getShellIntegrationReadiness: () => shellViewModel.shellIntegrationReadiness,
+      getShellSessionHandoffSummarySchema: () => shellViewModel.shellSessionHandoffSummarySchema,
       getShellSessionHandoffSummary: () => shellViewModel.shellSessionHandoffSummary,
+      isSupportedShellSessionHandoffSummary: shellViewModel.isSupportedShellSessionHandoffSummary,
+      getShellSessionHandoffCompatibilityReport: () => shellViewModel.shellSessionHandoffCompatibilityReport,
+      getShellSessionHandoffDisplayViewModel: () => shellViewModel.shellSessionHandoffDisplayViewModel,
+      getShellSessionHandoffSnapshot: () => shellViewModel.shellSessionHandoffSnapshot,
       getLauncherLinks: () => shellViewModel.launcherLinks,
       getControlPageApiMethods: () => shellViewModel.controlPage.browserApiMethods,
     };
diff --git a/wasm-port/runtime/ui/ini-panel/ui-shell.js b/wasm-port/runtime/ui/ini-panel/ui-shell.js
index 37b1d9c..fbe842c 100644
--- a/wasm-port/runtime/ui/ini-panel/ui-shell.js
+++ b/wasm-port/runtime/ui/ini-panel/ui-shell.js
@@ -126,7 +126,12 @@ export function createIniPanelLaunchApiManifest(entries = getVisibleIniPanelEntr
       "getShellIntegrationSchema",
       "getShellIntegrationManifest",
       "getShellIntegrationReadiness",
+      "getShellSessionHandoffSummarySchema",
       "getShellSessionHandoffSummary",
+      "isSupportedShellSessionHandoffSummary",
+      "getShellSessionHandoffCompatibilityReport",
+      "getShellSessionHandoffDisplayViewModel",
+      "getShellSessionHandoffSnapshot",
       "getLauncherLinks",
       "getControlPageApiMethods",
     ],
@@ -381,11 +386,44 @@ export function createIniPanelShellIntegrationWorkflowPlan({
   };
 }
 
+export function createIniPanelShellSessionHandoffSummarySchema() {
+  return {
+    apiName: "ini-panel-shell-session-handoff-summary",
+    summaryVersion: 1,
+    fields: [
+      "apiName",
+      "summaryVersion",
+      "phase",
+      "ready",
+      "targetPage",
+      "readiness",
+      "persistenceCapabilities",
+      "readonlyStatusFields",
+      "handoffMethods",
+      "blockingReasons",
+    ],
+  };
+}
+
+export function isSupportedIniPanelShellSessionHandoffSummary(
+  summary,
+  schema = createIniPanelShellSessionHandoffSummarySchema(),
+) {
+  if (!summary || typeof summary !== "object") {
+    return false;
+  }
+  if (summary.apiName !== schema.apiName || summary.summaryVersion !== schema.summaryVersion) {
+    return false;
+  }
+  return schema.fields.every((fieldName) => Object.hasOwn(summary, fieldName));
+}
+
 export function createIniPanelShellSessionHandoffSummary({
   manifest = createIniPanelShellIntegrationManifest(),
   readiness = createIniPanelShellIntegrationReadiness(manifest),
   workflowPlan = createIniPanelShellIntegrationWorkflowPlan({ manifest, readiness }),
 } = {}) {
+  const schema = createIniPanelShellSessionHandoffSummarySchema();
   const persistenceCapabilities = Array.isArray(manifest?.persistenceCapabilities)
     ? manifest.persistenceCapabilities.map(({ id, label, scope }) => ({ id, label, scope }))
     : [];
@@ -393,6 +431,8 @@ export function createIniPanelShellSessionHandoffSummary({
     ? [...workflowPlan.readonlyStatusHandoff.expectedStatusFields]
     : [];
   return {
+    apiName: schema.apiName,
+    summaryVersion: schema.summaryVersion,
     phase: workflowPlan.ready ? "ready" : "blocked",
     ready: Boolean(workflowPlan.ready),
     targetPage: workflowPlan.targetPage,
@@ -412,6 +452,107 @@ export function createIniPanelShellSessionHandoffSummary({
   };
 }
 
+export function createIniPanelShellSessionHandoffCompatibilityReport(
+  summary = createIniPanelShellSessionHandoffSummary(),
+  schema = createIniPanelShellSessionHandoffSummarySchema(),
+) {
+  const summaryObject = summary && typeof summary === "object" ? summary : {};
+  const missingFields = schema.fields.filter((fieldName) => !Object.hasOwn(summaryObject, fieldName));
+  const mismatchFields = [
+    ...(summaryObject.apiName === schema.apiName ? [] : ["apiName"]),
+    ...(summaryObject.summaryVersion === schema.summaryVersion ? [] : ["summaryVersion"]),
+  ];
+  const summarySupported = missingFields.length === 0 && mismatchFields.length === 0;
+  const blockingReasons = Array.isArray(summaryObject.blockingReasons)
+    ? [...summaryObject.blockingReasons]
+    : [];
+  const handoffReady = summarySupported && summaryObject.ready === true && blockingReasons.length === 0;
+
+  return {
+    apiName: "ini-panel-shell-session-handoff-compatibility-report",
+    reportVersion: 1,
+    phase: handoffReady ? "ready" : "blocked",
+    compatible: handoffReady,
+    summarySupported,
+    handoffReady,
+    schema: {
+      apiName: schema.apiName,
+      summaryVersion: schema.summaryVersion,
+      fields: [...schema.fields],
+    },
+    summary: {
+      apiName: summaryObject.apiName ?? null,
+      summaryVersion: summaryObject.summaryVersion ?? null,
+      phase: summaryObject.phase ?? null,
+      ready: summaryObject.ready ?? false,
+    },
+    missingFields,
+    mismatchFields,
+    blockingReasons,
+  };
+}
+
+export function createIniPanelShellSessionHandoffDisplayViewModel(
+  report = createIniPanelShellSessionHandoffCompatibilityReport(),
+) {
+  const missingFields = Array.isArray(report?.missingFields) ? report.missingFields : [];
+  const mismatchFields = Array.isArray(report?.mismatchFields) ? report.mismatchFields : [];
+  const blockingReasons = Array.isArray(report?.blockingReasons) ? report.blockingReasons : [];
+  const problems = [...missingFields, ...mismatchFields, ...blockingReasons];
+
+  return {
+    phase: report?.phase === "ready" ? "ready" : "blocked",
+    title: "Shell handoff compatibility",
+    statusText: report?.compatible ? "Ready" : "Blocked",
+    detailText: problems.length === 0 ? "No blocking reasons" : problems.join(", "),
+    rows: [
+      {
+        id: "summary-supported",
+        label: "Summary schema",
+        value: report?.summarySupported ? "supported" : "blocked",
+      },
+      {
+        id: "handoff-ready",
+        label: "Handoff readiness",
+        value: report?.handoffReady ? "ready" : "blocked",
+      },
+      {
+        id: "missing-fields",
+        label: "Missing fields",
+        value: missingFields.length === 0 ? "none" : missingFields.join(", "),
+      },
+      {
+        id: "mismatch-fields",
+        label: "Mismatched fields",
+        value: mismatchFields.length === 0 ? "none" : mismatchFields.join(", "),
+      },
+      {
+        id: "blocking-reasons",
+        label: "Blocking reasons",
+        value: blockingReasons.length === 0 ? "none" : blockingReasons.join(", "),
+      },
+    ],
+  };
+}
+
+export function createIniPanelShellSessionHandoffSnapshot({
+  readiness = createIniPanelShellIntegrationReadiness(),
+  summary = createIniPanelShellSessionHandoffSummary(),
+  compatibilityReport = createIniPanelShellSessionHandoffCompatibilityReport(summary),
+  displayViewModel = createIniPanelShellSessionHandoffDisplayViewModel(compatibilityReport),
+} = {}) {
+  return {
+    apiName: "ini-panel-shell-session-handoff-snapshot",
+    snapshotVersion: 1,
+    phase: compatibilityReport.phase,
+    ready: Boolean(compatibilityReport.compatible),
+    readiness,
+    summary,
+    compatibilityReport,
+    displayViewModel,
+  };
+}
+
 export function createIniPanelShellViewModel(entries = getVisibleIniPanelEntries()) {
   const shellIntegrationManifest = createIniPanelShellIntegrationManifest(entries);
   const shellIntegrationReadiness = createIniPanelShellIntegrationReadiness(shellIntegrationManifest);
@@ -419,6 +560,23 @@ export function createIniPanelShellViewModel(entries = getVisibleIniPanelEntries
     manifest: shellIntegrationManifest,
     readiness: shellIntegrationReadiness,
   });
+  const shellSessionHandoffSummary = createIniPanelShellSessionHandoffSummary({
+    manifest: shellIntegrationManifest,
+    readiness: shellIntegrationReadiness,
+    workflowPlan: shellIntegrationWorkflowPlan,
+  });
+  const shellSessionHandoffCompatibilityReport = createIniPanelShellSessionHandoffCompatibilityReport(
+    shellSessionHandoffSummary,
+  );
+  const shellSessionHandoffDisplayViewModel = createIniPanelShellSessionHandoffDisplayViewModel(
+    shellSessionHandoffCompatibilityReport,
+  );
+  const shellSessionHandoffSnapshot = createIniPanelShellSessionHandoffSnapshot({
+    readiness: shellIntegrationReadiness,
+    summary: shellSessionHandoffSummary,
+    compatibilityReport: shellSessionHandoffCompatibilityReport,
+    displayViewModel: shellSessionHandoffDisplayViewModel,
+  });
   return {
     pages: entries.map(({ id, href, title }) => ({
       id,
@@ -430,17 +588,22 @@ export function createIniPanelShellViewModel(entries = getVisibleIniPanelEntries
     shellIntegrationManifest,
     shellIntegrationReadiness,
     shellIntegrationWorkflowPlan,
-    shellSessionHandoffSummary: createIniPanelShellSessionHandoffSummary({
-      manifest: shellIntegrationManifest,
-      readiness: shellIntegrationReadiness,
-      workflowPlan: shellIntegrationWorkflowPlan,
-    }),
+    shellSessionHandoffSummarySchema: createIniPanelShellSessionHandoffSummarySchema(),
+    shellSessionHandoffSummary,
+    shellSessionHandoffCompatibilityReport,
+    shellSessionHandoffDisplayViewModel,
+    shellSessionHandoffSnapshot,
     launchApiSchema: createIniPanelLaunchApiSchema(),
     launchApiManifest: createIniPanelLaunchApiManifest(entries),
     isSupportedShellIntegrationManifest: isSupportedIniPanelShellIntegrationManifest,
     createShellIntegrationReadiness: createIniPanelShellIntegrationReadiness,
     createShellIntegrationWorkflowPlan: createIniPanelShellIntegrationWorkflowPlan,
+    isSupportedShellSessionHandoffSummary: isSupportedIniPanelShellSessionHandoffSummary,
+    createShellSessionHandoffSummarySchema: createIniPanelShellSessionHandoffSummarySchema,
     createShellSessionHandoffSummary: createIniPanelShellSessionHandoffSummary,
+    createShellSessionHandoffCompatibilityReport: createIniPanelShellSessionHandoffCompatibilityReport,
+    createShellSessionHandoffDisplayViewModel: createIniPanelShellSessionHandoffDisplayViewModel,
+    createShellSessionHandoffSnapshot: createIniPanelShellSessionHandoffSnapshot,
     controlPage: {
       browserApiSchema: createControlPageBrowserApiSchema(),
       browserApiManifest: createControlPageBrowserApiManifest(),
diff --git a/wasm-port/tests/browser/ini_panel_launch_smoke.html b/wasm-port/tests/browser/ini_panel_launch_smoke.html
index 16acecf..bce9b75 100644
--- a/wasm-port/tests/browser/ini_panel_launch_smoke.html
+++ b/wasm-port/tests/browser/ini_panel_launch_smoke.html
@@ -73,7 +73,12 @@
         !launchApi?.getShellIntegrationSchema ||
         !launchApi?.getShellIntegrationManifest ||
         !launchApi?.getShellIntegrationReadiness ||
+        !launchApi?.getShellSessionHandoffSummarySchema ||
         !launchApi?.getShellSessionHandoffSummary ||
+        !launchApi?.isSupportedShellSessionHandoffSummary ||
+        !launchApi?.getShellSessionHandoffCompatibilityReport ||
+        !launchApi?.getShellSessionHandoffDisplayViewModel ||
+        !launchApi?.getShellSessionHandoffSnapshot ||
         !launchApi?.getLauncherLinks ||
         !launchApi?.getControlPageApiMethods
       ) {
@@ -113,13 +118,17 @@
       );
       assertEqual(
         launchApiManifest.methods.join(","),
-        "isSupportedLaunchApiManifest,getLaunchApiSchema,getLaunchApiManifest,getShellIntegrationSchema,getShellIntegrationManifest,getShellIntegrationReadiness,getShellSessionHandoffSummary,getLauncherLinks,getControlPageApiMethods",
+        "isSupportedLaunchApiManifest,getLaunchApiSchema,getLaunchApiManifest,getShellIntegrationSchema,getShellIntegrationManifest,getShellIntegrationReadiness,getShellSessionHandoffSummarySchema,getShellSessionHandoffSummary,isSupportedShellSessionHandoffSummary,getShellSessionHandoffCompatibilityReport,getShellSessionHandoffDisplayViewModel,getShellSessionHandoffSnapshot,getLauncherLinks,getControlPageApiMethods",
         "launch API manifest methods",
       );
       const shellIntegrationSchema = launchApi.getShellIntegrationSchema();
       const shellIntegrationManifest = launchApi.getShellIntegrationManifest();
       const shellIntegrationReadiness = launchApi.getShellIntegrationReadiness();
+      const shellSessionHandoffSummarySchema = launchApi.getShellSessionHandoffSummarySchema();
       const shellSessionHandoffSummary = launchApi.getShellSessionHandoffSummary();
+      const shellSessionHandoffCompatibilityReport = launchApi.getShellSessionHandoffCompatibilityReport();
+      const shellSessionHandoffDisplayViewModel = launchApi.getShellSessionHandoffDisplayViewModel();
+      const shellSessionHandoffSnapshot = launchApi.getShellSessionHandoffSnapshot();
       assertEqual(
         shellIntegrationSchema.manifestVersion,
         1,
@@ -165,6 +174,86 @@
         true,
         "shell session handoff summary readiness",
       );
+      assertEqual(
+        shellSessionHandoffSummarySchema.summaryVersion,
+        1,
+        "shell session handoff summary schema version",
+      );
+      assertEqual(
+        launchApi.isSupportedShellSessionHandoffSummary(shellSessionHandoffSummary),
+        true,
+        "shell session handoff summary supported",
+      );
+      assertEqual(
+        launchApi.isSupportedShellSessionHandoffSummary({ ...shellSessionHandoffSummary, summaryVersion: 2 }),
+        false,
+        "shell session handoff summary rejects version",
+      );
+      assertEqual(
+        shellSessionHandoffCompatibilityReport.compatible,
+        true,
+        "shell session handoff compatibility report",
+      );
+      assertEqual(
+        shellSessionHandoffCompatibilityReport.summarySupported,
+        true,
+        "shell session handoff summary support report",
+      );
+      assertEqual(
+        shellSessionHandoffCompatibilityReport.missingFields.join(","),
+        "",
+        "shell session handoff compatibility missing fields",
+      );
+      assertEqual(
+        shellSessionHandoffDisplayViewModel.statusText,
+        "Ready",
+        "shell session handoff display status",
+      );
+      assertEqual(
+        shellSessionHandoffDisplayViewModel.rows.length,
+        5,
+        "shell session handoff display rows",
+      );
+      assertEqual(
+        shellSessionHandoffSnapshot.snapshotVersion,
+        1,
+        "shell session handoff snapshot version",
+      );
+      assertEqual(
+        shellSessionHandoffSnapshot.ready,
+        true,
+        "shell session handoff snapshot readiness",
+      );
+      assertEqual(
+        JSON.stringify(shellSessionHandoffSnapshot.readiness),
+        JSON.stringify(shellIntegrationReadiness),
+        "shell session handoff snapshot readiness object",
+      );
+      assertEqual(
+        JSON.stringify(shellSessionHandoffSnapshot.summary),
+        JSON.stringify(shellSessionHandoffSummary),
+        "shell session handoff snapshot summary object",
+      );
+      assertEqual(
+        JSON.stringify(shellSessionHandoffSnapshot.displayViewModel),
+        JSON.stringify(shellSessionHandoffDisplayViewModel),
+        "shell session handoff snapshot display object",
+      );
+      assertEqual(
+        launchDoc.querySelector("[data-handoff-status]").textContent,
+        "Ready: No blocking reasons",
+        "shell session handoff DOM status",
+      );
+      assertEqual(
+        launchDoc.querySelector('[data-handoff-value="missing-fields"]').textContent,
+        "none",
+        "shell session handoff DOM missing fields",
+      );
+      assertEqual(
+        launchDoc.querySelector('[data-handoff-value="blocking-reasons"]').textContent,
+        "none",
+        "shell session handoff DOM blocking reasons",
+      );
       assertEqual(
         shellSessionHandoffSummary.targetPage.href,
         "./control-page.html",
diff --git a/wasm-port/tests/browser/ini_panel_shell_integration_workflow_smoke.html b/wasm-port/tests/browser/ini_panel_shell_integration_workflow_smoke.html
index 948309f..867a5e7 100644
--- a/wasm-port/tests/browser/ini_panel_shell_integration_workflow_smoke.html
+++ b/wasm-port/tests/browser/ini_panel_shell_integration_workflow_smoke.html
@@ -64,14 +64,36 @@ TOOL_TABLE = browser-shell-tool.tbl
       if (
         !launchApi?.getShellIntegrationManifest ||
         !launchApi?.getShellIntegrationReadiness ||
-        !launchApi?.getShellSessionHandoffSummary
+        !launchApi?.getShellSessionHandoffSummarySchema ||
+        !launchApi?.getShellSessionHandoffSummary ||
+        !launchApi?.isSupportedShellSessionHandoffSummary ||
+        !launchApi?.getShellSessionHandoffCompatibilityReport ||
+        !launchApi?.getShellSessionHandoffDisplayViewModel ||
+        !launchApi?.getShellSessionHandoffSnapshot
       ) {
         throw new Error("launch API namespace did not expose shell integration helpers");
       }
 
       const integrationManifest = launchApi.getShellIntegrationManifest();
       const readiness = launchApi.getShellIntegrationReadiness();
+      const handoffSummarySchema = launchApi.getShellSessionHandoffSummarySchema();
       const handoffSummary = launchApi.getShellSessionHandoffSummary();
+      const compatibilityReport = launchApi.getShellSessionHandoffCompatibilityReport();
+      const handoffDisplay = launchApi.getShellSessionHandoffDisplayViewModel();
+      const handoffSnapshot = launchApi.getShellSessionHandoffSnapshot();
+      assertEqual(handoffSummarySchema.summaryVersion, 1, "shell handoff summary schema version");
+      assertEqual(
+        launchApi.isSupportedShellSessionHandoffSummary(handoffSummary),
+        true,
+        "shell handoff summary supported",
+      );
+      assertEqual(compatibilityReport.compatible, true, "shell handoff compatibility report");
+      assertEqual(compatibilityReport.summarySupported, true, "shell handoff summary report support");
+      assertEqual(compatibilityReport.blockingReasons.join(","), "", "shell handoff report blocking reasons");
+      assertEqual(handoffDisplay.statusText, "Ready", "shell handoff display status");
+      assertEqual(handoffDisplay.detailText, "No blocking reasons", "shell handoff display detail");
+      assertEqual(handoffSnapshot.ready, true, "shell handoff snapshot readiness");
+      assertEqual(handoffSnapshot.displayViewModel.statusText, "Ready", "shell handoff snapshot display status");
       assertEqual(readiness.phase, "ready", "shell integration readiness phase");
       assertEqual(readiness.ready, true, "shell integration readiness");
       assertEqual(readiness.missing.join(","), "", "shell integration readiness missing checks");
diff --git a/wasm-port/tests/ui/node/verify_ini_panel_entry_docs.mjs b/wasm-port/tests/ui/node/verify_ini_panel_entry_docs.mjs
index f5f100d..b793793 100644
--- a/wasm-port/tests/ui/node/verify_ini_panel_entry_docs.mjs
+++ b/wasm-port/tests/ui/node/verify_ini_panel_entry_docs.mjs
@@ -18,7 +18,11 @@ import {
   createIniPanelShellIntegrationReadiness,
   createIniPanelShellIntegrationSchema,
   createIniPanelShellIntegrationWorkflowPlan,
+  createIniPanelShellSessionHandoffCompatibilityReport,
+  createIniPanelShellSessionHandoffDisplayViewModel,
+  createIniPanelShellSessionHandoffSnapshot,
   createIniPanelShellSessionHandoffSummary,
+  createIniPanelShellSessionHandoffSummarySchema,
   createIniPanelShellViewModel,
   createMachineSessionReadonlyStatus,
   createMachineSessionReadonlyStatusApiManifest,
@@ -29,6 +33,7 @@ import {
   isSupportedIniPanelControlPageApiManifest,
   isSupportedIniPanelLaunchApiManifest,
   isSupportedIniPanelShellIntegrationManifest,
+  isSupportedIniPanelShellSessionHandoffSummary,
 } from "../../../runtime/ui/ini-panel/ui-shell.js";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
@@ -66,13 +71,18 @@ const requiredShellExports = [
   "createIniPanelShellIntegrationReadiness",
   "createIniPanelShellIntegrationSchema",
   "createIniPanelShellIntegrationWorkflowPlan",
+  "createIniPanelShellSessionHandoffCompatibilityReport",
+  "createIniPanelShellSessionHandoffDisplayViewModel",
+  "createIniPanelShellSessionHandoffSnapshot",
   "createIniPanelShellSessionHandoffSummary",
+  "createIniPanelShellSessionHandoffSummarySchema",
   "createIniPanelShellViewModel",
   "getIniPanelEntryByHref",
   "getVisibleIniPanelEntries",
   "isSupportedIniPanelControlPageApiManifest",
   "isSupportedIniPanelLaunchApiManifest",
   "isSupportedIniPanelShellIntegrationManifest",
+  "isSupportedIniPanelShellSessionHandoffSummary",
   "createMachineSessionControlPageController",
   "createMachineSessionReadonlyStatus",
   "createMachineSessionReadonlyStatusApiManifest",
@@ -152,6 +162,28 @@ assert.deepEqual(
     workflowPlan: createIniPanelShellViewModel().shellIntegrationWorkflowPlan,
   }),
 );
+assert.deepEqual(
+  createIniPanelShellViewModel().shellSessionHandoffSummarySchema,
+  createIniPanelShellSessionHandoffSummarySchema(),
+);
+assert.equal(isSupportedIniPanelShellSessionHandoffSummary(createIniPanelShellViewModel().shellSessionHandoffSummary), true);
+assert.deepEqual(
+  createIniPanelShellViewModel().shellSessionHandoffCompatibilityReport,
+  createIniPanelShellSessionHandoffCompatibilityReport(createIniPanelShellViewModel().shellSessionHandoffSummary),
+);
+assert.deepEqual(
+  createIniPanelShellViewModel().shellSessionHandoffDisplayViewModel,
+  createIniPanelShellSessionHandoffDisplayViewModel(createIniPanelShellViewModel().shellSessionHandoffCompatibilityReport),
+);
+assert.deepEqual(
+  createIniPanelShellViewModel().shellSessionHandoffSnapshot,
+  createIniPanelShellSessionHandoffSnapshot({
+    readiness: createIniPanelShellViewModel().shellIntegrationReadiness,
+    summary: createIniPanelShellViewModel().shellSessionHandoffSummary,
+    compatibilityReport: createIniPanelShellViewModel().shellSessionHandoffCompatibilityReport,
+    displayViewModel: createIniPanelShellViewModel().shellSessionHandoffDisplayViewModel,
+  }),
+);
 assert.equal(isSupportedIniPanelShellIntegrationManifest(createIniPanelShellViewModel().shellIntegrationManifest), true);
 assert.deepEqual(createIniPanelShellViewModel().launchApiSchema, createIniPanelLaunchApiSchema());
 assert.deepEqual(createIniPanelShellViewModel().launchApiManifest, createIniPanelLaunchApiManifest());
@@ -206,10 +238,15 @@ assert.match(shellText, /\bexport function createIniPanelShellIntegrationSchema\
 assert.match(shellText, /\bexport function createIniPanelShellIntegrationManifest\b/);
 assert.match(shellText, /\bexport function createIniPanelShellIntegrationReadiness\b/);
 assert.match(shellText, /\bexport function createIniPanelShellIntegrationWorkflowPlan\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffCompatibilityReport\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffDisplayViewModel\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffSnapshot\b/);
 assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffSummary\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffSummarySchema\b/);
 assert.match(shellText, /\bexport function isSupportedIniPanelControlPageApiManifest\b/);
 assert.match(shellText, /\bexport function isSupportedIniPanelLaunchApiManifest\b/);
 assert.match(shellText, /\bexport function isSupportedIniPanelShellIntegrationManifest\b/);
+assert.match(shellText, /\bexport function isSupportedIniPanelShellSessionHandoffSummary\b/);
 assert.match(controlPageText, /\bisSupportedControlPageApiManifest\b/);
 assert.match(controlPageText, /\bgetControlPageApiSchema\b/);
 assert.match(controlPageText, /\bgetControlPageApiManifest\b/);
@@ -221,7 +258,14 @@ assert.match(launchText, /\bgetLaunchApiManifest\b/);
 assert.match(launchText, /\bgetShellIntegrationSchema\b/);
 assert.match(launchText, /\bgetShellIntegrationManifest\b/);
 assert.match(launchText, /\bgetShellIntegrationReadiness\b/);
+assert.match(launchText, /\bgetShellSessionHandoffSummarySchema\b/);
 assert.match(launchText, /\bgetShellSessionHandoffSummary\b/);
+assert.match(launchText, /\bisSupportedShellSessionHandoffSummary\b/);
+assert.match(launchText, /\bgetShellSessionHandoffCompatibilityReport\b/);
+assert.match(launchText, /\bgetShellSessionHandoffDisplayViewModel\b/);
+assert.match(launchText, /\bgetShellSessionHandoffSnapshot\b/);
+assert.match(launchText, /\bdata-handoff-status\b/);
+assert.match(launchText, /\bdata-handoff-rows\b/);
 assert.match(launchText, /\bgetControlPageApiMethods\b/);
 assert.match(controlPageText, /\bgetControlPageContract\b/);
 assert.match(controlPageText, /\breadControlPageStatus\b/);
@@ -240,22 +284,38 @@ assert.match(docText, /\bcreateIniPanelShellIntegrationManifest\b/);
 assert.match(docText, /\bcreateIniPanelShellIntegrationReadiness\b/);
 assert.match(docText, /\bcreateIniPanelShellIntegrationSchema\b/);
 assert.match(docText, /\bcreateIniPanelShellIntegrationWorkflowPlan\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffCompatibilityReport\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffDisplayViewModel\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffSnapshot\b/);
 assert.match(docText, /\bcreateIniPanelShellSessionHandoffSummary\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffSummarySchema\b/);
 assert.match(docText, /\bisSupportedIniPanelControlPageApiManifest\b/);
 assert.match(docText, /\bisSupportedIniPanelLaunchApiManifest\b/);
 assert.match(docText, /\bisSupportedIniPanelShellIntegrationManifest\b/);
+assert.match(docText, /\bisSupportedIniPanelShellSessionHandoffSummary\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.isSupportedLaunchApiManifest\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getLaunchApiSchema\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getLaunchApiManifest\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellIntegrationSchema\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellIntegrationManifest\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellIntegrationReadiness\b/);
+assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellSessionHandoffSummarySchema\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellSessionHandoffSummary\b/);
+assert.match(docText, /\blinuxCncIniPanelLaunchApi\.isSupportedShellSessionHandoffSummary\b/);
+assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellSessionHandoffCompatibilityReport\b/);
+assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellSessionHandoffDisplayViewModel\b/);
+assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getShellSessionHandoffSnapshot\b/);
+assert.match(docText, /\bdata-handoff-status\b/);
+assert.match(docText, /\bdata-handoff-rows\b/);
 assert.match(docText, /\blinuxCncIniPanelLaunchApi\.getControlPageApiMethods\b/);
 assert.match(docText, /\bini_panel_shell_integration_workflow_smoke\.html\b/);
 assert.match(browserIniPanelText, /\bini_panel_shell_integration_workflow_smoke\.html\b/);
 assert.match(shellIntegrationWorkflowSmokeText, /\bgetShellIntegrationReadiness\b/);
 assert.match(shellIntegrationWorkflowSmokeText, /\bgetShellSessionHandoffSummary\b/);
+assert.match(shellIntegrationWorkflowSmokeText, /\bisSupportedShellSessionHandoffSummary\b/);
+assert.match(shellIntegrationWorkflowSmokeText, /\bgetShellSessionHandoffCompatibilityReport\b/);
+assert.match(shellIntegrationWorkflowSmokeText, /\bgetShellSessionHandoffDisplayViewModel\b/);
+assert.match(shellIntegrationWorkflowSmokeText, /\bgetShellSessionHandoffSnapshot\b/);
 assert.match(shellIntegrationWorkflowSmokeText, /\bhandoffSummary\.handoffMethods\.readStatus\b/);
 assert.match(shellIntegrationWorkflowSmokeText, /\breadControlPageStatus\b/);
 assert.match(shellIntegrationWorkflowSmokeText, /\bbrowser_ini_shell_integration_workflow_smoke=ok\b/);
diff --git a/wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.mjs b/wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.mjs
index 7612d81..0d64de5 100644
--- a/wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.mjs
+++ b/wasm-port/tests/ui/node/verify_ini_panel_launch_api_manifest.mjs
@@ -46,7 +46,12 @@ assert.deepEqual(manifest, {
     "getShellIntegrationSchema",
     "getShellIntegrationManifest",
     "getShellIntegrationReadiness",
+    "getShellSessionHandoffSummarySchema",
     "getShellSessionHandoffSummary",
+    "isSupportedShellSessionHandoffSummary",
+    "getShellSessionHandoffCompatibilityReport",
+    "getShellSessionHandoffDisplayViewModel",
+    "getShellSessionHandoffSnapshot",
     "getLauncherLinks",
     "getControlPageApiMethods",
   ],
@@ -147,7 +152,12 @@ assert.match(launchText, /\bgetLaunchApiManifest\b/);
 assert.match(launchText, /\bgetShellIntegrationSchema\b/);
 assert.match(launchText, /\bgetShellIntegrationManifest\b/);
 assert.match(launchText, /\bgetShellIntegrationReadiness\b/);
+assert.match(launchText, /\bgetShellSessionHandoffSummarySchema\b/);
 assert.match(launchText, /\bgetShellSessionHandoffSummary\b/);
+assert.match(launchText, /\bisSupportedShellSessionHandoffSummary\b/);
+assert.match(launchText, /\bgetShellSessionHandoffCompatibilityReport\b/);
+assert.match(launchText, /\bgetShellSessionHandoffDisplayViewModel\b/);
+assert.match(launchText, /\bgetShellSessionHandoffSnapshot\b/);
 assert.match(launchText, /\blinuxCncIniPanelLaunchApi\b/);
 
 console.log("ini_panel_launch_api_manifest_node_smoke=ok");
diff --git a/wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.mjs b/wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.mjs
index ed87685..744c036 100644
--- a/wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.mjs
+++ b/wasm-port/tests/ui/node/verify_ini_panel_shell_integration_manifest.mjs
@@ -14,9 +14,14 @@ import {
   createIniPanelShellIntegrationReadiness,
   createIniPanelShellIntegrationSchema,
   createIniPanelShellIntegrationWorkflowPlan,
+  createIniPanelShellSessionHandoffCompatibilityReport,
+  createIniPanelShellSessionHandoffDisplayViewModel,
+  createIniPanelShellSessionHandoffSnapshot,
   createIniPanelShellSessionHandoffSummary,
+  createIniPanelShellSessionHandoffSummarySchema,
   getVisibleIniPanelEntries,
   isSupportedIniPanelShellIntegrationManifest,
+  isSupportedIniPanelShellSessionHandoffSummary,
 } from "../../../runtime/ui/ini-panel/ui-shell.js";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
@@ -30,6 +35,15 @@ const manifest = createIniPanelShellIntegrationManifest();
 const readiness = createIniPanelShellIntegrationReadiness(manifest);
 const workflowPlan = createIniPanelShellIntegrationWorkflowPlan({ manifest, readiness });
 const handoffSummary = createIniPanelShellSessionHandoffSummary({ manifest, readiness, workflowPlan });
+const handoffSummarySchema = createIniPanelShellSessionHandoffSummarySchema();
+const handoffCompatibilityReport = createIniPanelShellSessionHandoffCompatibilityReport(handoffSummary);
+const handoffDisplayViewModel = createIniPanelShellSessionHandoffDisplayViewModel(handoffCompatibilityReport);
+const handoffSnapshot = createIniPanelShellSessionHandoffSnapshot({
+  readiness,
+  summary: handoffSummary,
+  compatibilityReport: handoffCompatibilityReport,
+  displayViewModel: handoffDisplayViewModel,
+});
 
 assert.deepEqual(schema, {
   apiName: "ini-panel-shell-integration",
@@ -85,7 +99,7 @@ assert.deepEqual(readiness, {
   counts: {
     pages: 2,
     launcherLinks: 2,
-    launchMethods: 9,
+    launchMethods: 14,
     controlPageMethods: 11,
     persistenceCapabilities: 3,
   },
@@ -133,6 +147,8 @@ assert.deepEqual(workflowPlan, {
   },
 });
 assert.deepEqual(handoffSummary, {
+  apiName: "ini-panel-shell-session-handoff-summary",
+  summaryVersion: 1,
   phase: "ready",
   ready: true,
   targetPage: {
@@ -145,7 +161,7 @@ assert.deepEqual(handoffSummary, {
     counts: {
       pages: 2,
       launcherLinks: 2,
-      launchMethods: 9,
+      launchMethods: 14,
       controlPageMethods: 11,
       persistenceCapabilities: 3,
     },
@@ -189,6 +205,149 @@ assert.deepEqual(handoffSummary, {
   },
   blockingReasons: [],
 });
+assert.deepEqual(handoffSummarySchema, {
+  apiName: "ini-panel-shell-session-handoff-summary",
+  summaryVersion: 1,
+  fields: [
+    "apiName",
+    "summaryVersion",
+    "phase",
+    "ready",
+    "targetPage",
+    "readiness",
+    "persistenceCapabilities",
+    "readonlyStatusFields",
+    "handoffMethods",
+    "blockingReasons",
+  ],
+});
+assert.equal(isSupportedIniPanelShellSessionHandoffSummary(handoffSummary), true);
+assert.equal(
+  isSupportedIniPanelShellSessionHandoffSummary({ ...handoffSummary, summaryVersion: 2 }),
+  false,
+);
+assert.equal(
+  isSupportedIniPanelShellSessionHandoffSummary({ ...handoffSummary, apiName: "other" }),
+  false,
+);
+const missingSummaryField = { ...handoffSummary };
+delete missingSummaryField.readonlyStatusFields;
+assert.equal(isSupportedIniPanelShellSessionHandoffSummary(missingSummaryField), false);
+assert.equal(isSupportedIniPanelShellSessionHandoffSummary(null), false);
+assert.deepEqual(handoffCompatibilityReport, {
+  apiName: "ini-panel-shell-session-handoff-compatibility-report",
+  reportVersion: 1,
+  phase: "ready",
+  compatible: true,
+  summarySupported: true,
+  handoffReady: true,
+  schema: {
+    apiName: "ini-panel-shell-session-handoff-summary",
+    summaryVersion: 1,
+    fields: [
+      "apiName",
+      "summaryVersion",
+      "phase",
+      "ready",
+      "targetPage",
+      "readiness",
+      "persistenceCapabilities",
+      "readonlyStatusFields",
+      "handoffMethods",
+      "blockingReasons",
+    ],
+  },
+  summary: {
+    apiName: "ini-panel-shell-session-handoff-summary",
+    summaryVersion: 1,
+    phase: "ready",
+    ready: true,
+  },
+  missingFields: [],
+  mismatchFields: [],
+  blockingReasons: [],
+});
+assert.deepEqual(handoffDisplayViewModel, {
+  phase: "ready",
+  title: "Shell handoff compatibility",
+  statusText: "Ready",
+  detailText: "No blocking reasons",
+  rows: [
+    {
+      id: "summary-supported",
+      label: "Summary schema",
+      value: "supported",
+    },
+    {
+      id: "handoff-ready",
+      label: "Handoff readiness",
+      value: "ready",
+    },
+    {
+      id: "missing-fields",
+      label: "Missing fields",
+      value: "none",
+    },
+    {
+      id: "mismatch-fields",
+      label: "Mismatched fields",
+      value: "none",
+    },
+    {
+      id: "blocking-reasons",
+      label: "Blocking reasons",
+      value: "none",
+    },
+  ],
+});
+assert.deepEqual(handoffSnapshot, {
+  apiName: "ini-panel-shell-session-handoff-snapshot",
+  snapshotVersion: 1,
+  phase: "ready",
+  ready: true,
+  readiness,
+  summary: handoffSummary,
+  compatibilityReport: handoffCompatibilityReport,
+  displayViewModel: handoffDisplayViewModel,
+});
+assert.equal(createIniPanelShellSessionHandoffSnapshot().displayViewModel.rows.length, 5);
+assert.deepEqual(
+  createIniPanelShellSessionHandoffDisplayViewModel(
+    createIniPanelShellSessionHandoffCompatibilityReport({ ...handoffSummary, summaryVersion: 2 }),
+  ).rows.find((row) => row.id === "mismatch-fields"),
+  {
+    id: "mismatch-fields",
+    label: "Mismatched fields",
+    value: "summaryVersion",
+  },
+);
+assert.deepEqual(
+  createIniPanelShellSessionHandoffCompatibilityReport({ ...handoffSummary, summaryVersion: 2 }),
+  {
+    ...handoffCompatibilityReport,
+    phase: "blocked",
+    compatible: false,
+    summarySupported: false,
+    handoffReady: false,
+    summary: {
+      apiName: "ini-panel-shell-session-handoff-summary",
+      summaryVersion: 2,
+      phase: "ready",
+      ready: true,
+    },
+    mismatchFields: ["summaryVersion"],
+  },
+);
+const missingFieldReportInput = { ...handoffSummary };
+delete missingFieldReportInput.readonlyStatusFields;
+assert.deepEqual(
+  createIniPanelShellSessionHandoffCompatibilityReport(missingFieldReportInput).missingFields,
+  ["readonlyStatusFields"],
+);
+assert.deepEqual(
+  createIniPanelShellSessionHandoffCompatibilityReport(null).missingFields,
+  handoffSummarySchema.fields,
+);
 const blockedManifest = {
   ...createIniPanelShellIntegrationManifest(),
   compatibility: {
@@ -210,7 +369,7 @@ assert.deepEqual(createIniPanelShellIntegrationReadiness(blockedManifest), {
   counts: {
     pages: 2,
     launcherLinks: 2,
-    launchMethods: 9,
+    launchMethods: 14,
     controlPageMethods: 11,
     persistenceCapabilities: 3,
   },
@@ -239,6 +398,22 @@ assert.deepEqual(
   }).blockingReasons,
   ["launchCompatibility"],
 );
+assert.deepEqual(
+  createIniPanelShellSessionHandoffCompatibilityReport(createIniPanelShellSessionHandoffSummary({
+    manifest: blockedManifest,
+    readiness: createIniPanelShellIntegrationReadiness(blockedManifest),
+    workflowPlan: blockedWorkflowPlan,
+  })).blockingReasons,
+  ["launchCompatibility"],
+);
+assert.equal(
+  createIniPanelShellSessionHandoffCompatibilityReport(createIniPanelShellSessionHandoffSummary({
+    manifest: blockedManifest,
+    readiness: createIniPanelShellIntegrationReadiness(blockedManifest),
+    workflowPlan: blockedWorkflowPlan,
+  })).compatible,
+  false,
+);
 const missingTargetPlan = createIniPanelShellIntegrationWorkflowPlan({
   manifest,
   controlEntryId: "missing-entry",
@@ -337,7 +512,12 @@ assert.match(shellText, /\bexport function createIniPanelShellIntegrationSchema\
 assert.match(shellText, /\bexport function createIniPanelShellIntegrationManifest\b/);
 assert.match(shellText, /\bexport function createIniPanelShellIntegrationReadiness\b/);
 assert.match(shellText, /\bexport function createIniPanelShellIntegrationWorkflowPlan\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffCompatibilityReport\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffDisplayViewModel\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffSnapshot\b/);
 assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffSummary\b/);
+assert.match(shellText, /\bexport function createIniPanelShellSessionHandoffSummarySchema\b/);
+assert.match(shellText, /\bexport function isSupportedIniPanelShellSessionHandoffSummary\b/);
 assert.match(shellText, /\bexport function isSupportedIniPanelShellIntegrationManifest\b/);
 assert.match(launchText, /\bgetShellIntegrationSchema\b/);
 assert.match(launchText, /\bgetShellIntegrationManifest\b/);
@@ -345,7 +525,12 @@ assert.match(launchText, /\bgetShellIntegrationReadiness\b/);
 assert.match(docText, /\bcreateIniPanelShellIntegrationManifest\b/);
 assert.match(docText, /\bcreateIniPanelShellIntegrationReadiness\b/);
 assert.match(docText, /\bcreateIniPanelShellIntegrationWorkflowPlan\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffCompatibilityReport\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffDisplayViewModel\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffSnapshot\b/);
 assert.match(docText, /\bcreateIniPanelShellSessionHandoffSummary\b/);
+assert.match(docText, /\bcreateIniPanelShellSessionHandoffSummarySchema\b/);
+assert.match(docText, /\bisSupportedIniPanelShellSessionHandoffSummary\b/);
 assert.match(docText, /\bisSupportedIniPanelShellIntegrationManifest\b/);
 assert.doesNotMatch(shellText, /\bparseGcode\b|\bcanonicalEvents\b|\btoolTable\b|\bplanner\b/);
 
diff --git a/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs b/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs
index d730eac..ff7d1ab 100644
--- a/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs
+++ b/wasm-port/tests/ui/node/verify_ini_panel_ui_shell.mjs
@@ -14,7 +14,11 @@ import {
   createIniPanelShellIntegrationReadiness,
   createIniPanelShellIntegrationSchema,
   createIniPanelShellIntegrationWorkflowPlan,
+  createIniPanelShellSessionHandoffCompatibilityReport,
+  createIniPanelShellSessionHandoffDisplayViewModel,
+  createIniPanelShellSessionHandoffSnapshot,
   createIniPanelShellSessionHandoffSummary,
+  createIniPanelShellSessionHandoffSummarySchema,
   createIniPanelShellViewModel,
   createMachineSessionReadonlyStatus,
   createMachineSessionReadonlyStatusApiManifest,
@@ -27,6 +31,7 @@ import {
   isSupportedIniPanelControlPageApiManifest,
   isSupportedIniPanelLaunchApiManifest,
   isSupportedIniPanelShellIntegrationManifest,
+  isSupportedIniPanelShellSessionHandoffSummary,
   loadMachineSessionForControlPageWorkflow,
   readMachineSessionReadonlyStatus,
   refreshMachineSessionControlPage,
@@ -67,7 +72,11 @@ assert.equal(typeof createIniPanelShellIntegrationManifest, "function");
 assert.equal(typeof createIniPanelShellIntegrationReadiness, "function");
 assert.equal(typeof createIniPanelShellIntegrationSchema, "function");
 assert.equal(typeof createIniPanelShellIntegrationWorkflowPlan, "function");
+assert.equal(typeof createIniPanelShellSessionHandoffCompatibilityReport, "function");
+assert.equal(typeof createIniPanelShellSessionHandoffDisplayViewModel, "function");
+assert.equal(typeof createIniPanelShellSessionHandoffSnapshot, "function");
 assert.equal(typeof createIniPanelShellSessionHandoffSummary, "function");
+assert.equal(typeof createIniPanelShellSessionHandoffSummarySchema, "function");
 assert.equal(typeof loadMachineSessionForControlPageWorkflow, "function");
 assert.equal(typeof readMachineSessionReadonlyStatus, "function");
 assert.equal(typeof refreshMachineSessionControlPage, "function");
@@ -75,6 +84,7 @@ assert.equal(typeof renderMachineSessionControlView, "function");
 assert.equal(typeof isSupportedIniPanelControlPageApiManifest, "function");
 assert.equal(typeof isSupportedIniPanelLaunchApiManifest, "function");
 assert.equal(typeof isSupportedIniPanelShellIntegrationManifest, "function");
+assert.equal(typeof isSupportedIniPanelShellSessionHandoffSummary, "function");
 
 const shellManifest = getIniPanelEntryManifest();
 shellManifest[0].title = "changed";
@@ -132,6 +142,58 @@ assert.deepEqual(
     workflowPlan: shellViewModel.shellIntegrationWorkflowPlan,
   }),
 );
+assert.deepEqual(shellViewModel.shellSessionHandoffSummarySchema, createIniPanelShellSessionHandoffSummarySchema());
+assert.equal(isSupportedIniPanelShellSessionHandoffSummary(shellViewModel.shellSessionHandoffSummary), true);
+assert.deepEqual(
+  shellViewModel.shellSessionHandoffCompatibilityReport,
+  createIniPanelShellSessionHandoffCompatibilityReport(shellViewModel.shellSessionHandoffSummary),
+);
+assert.deepEqual(
+  shellViewModel.shellSessionHandoffDisplayViewModel,
+  createIniPanelShellSessionHandoffDisplayViewModel(shellViewModel.shellSessionHandoffCompatibilityReport),
+);
+assert.deepEqual(
+  shellViewModel.shellSessionHandoffSnapshot,
+  createIniPanelShellSessionHandoffSnapshot({
+    readiness: shellViewModel.shellIntegrationReadiness,
+    summary: shellViewModel.shellSessionHandoffSummary,
+    compatibilityReport: shellViewModel.shellSessionHandoffCompatibilityReport,
+    displayViewModel: shellViewModel.shellSessionHandoffDisplayViewModel,
+  }),
+);
+assert.deepEqual(shellViewModel.shellSessionHandoffDisplayViewModel, {
+  phase: "ready",
+  title: "Shell handoff compatibility",
+  statusText: "Ready",
+  detailText: "No blocking reasons",
+  rows: [
+    {
+      id: "summary-supported",
+      label: "Summary schema",
+      value: "supported",
+    },
+    {
+      id: "handoff-ready",
+      label: "Handoff readiness",
+      value: "ready",
+    },
+    {
+      id: "missing-fields",
+      label: "Missing fields",
+      value: "none",
+    },
+    {
+      id: "mismatch-fields",
+      label: "Mismatched fields",
+      value: "none",
+    },
+    {
+      id: "blocking-reasons",
+      label: "Blocking reasons",
+      value: "none",
+    },
+  ],
+});
 assert.equal(
   isSupportedIniPanelShellIntegrationManifest(shellViewModel.shellIntegrationManifest),
   true,
@@ -164,7 +226,18 @@ assert.equal(shellViewModel.controlPage.createController, createMachineSessionCo
 assert.equal(shellViewModel.isSupportedShellIntegrationManifest, isSupportedIniPanelShellIntegrationManifest);
 assert.equal(shellViewModel.createShellIntegrationReadiness, createIniPanelShellIntegrationReadiness);
 assert.equal(shellViewModel.createShellIntegrationWorkflowPlan, createIniPanelShellIntegrationWorkflowPlan);
+assert.equal(shellViewModel.isSupportedShellSessionHandoffSummary, isSupportedIniPanelShellSessionHandoffSummary);
+assert.equal(shellViewModel.createShellSessionHandoffSummarySchema, createIniPanelShellSessionHandoffSummarySchema);
 assert.equal(shellViewModel.createShellSessionHandoffSummary, createIniPanelShellSessionHandoffSummary);
+assert.equal(
+  shellViewModel.createShellSessionHandoffCompatibilityReport,
+  createIniPanelShellSessionHandoffCompatibilityReport,
+);
+assert.equal(
+  shellViewModel.createShellSessionHandoffDisplayViewModel,
+  createIniPanelShellSessionHandoffDisplayViewModel,
+);
+assert.equal(shellViewModel.createShellSessionHandoffSnapshot, createIniPanelShellSessionHandoffSnapshot);
 assert.deepEqual(shellViewModel.controlPage.contract, createIniPanelShellControlPageContract());
 assert.equal(shellViewModel.controlPage.isSupportedBrowserApiManifest, isSupportedIniPanelControlPageApiManifest);
 assert.equal(shellViewModel.controlPage.loadSessionState, loadMachineSessionForControlPageWorkflow);