From 6a59fe42ed74dc0f35d1c62fca2dd50c11df57c8 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 22 Sep 2025 23:19:51 -0700
Subject: [PATCH 01/24] feat: submit hook for capture both successful, failed
 submissions

---
 lua/leetcode/config/template.lua | 4 ++++
 lua/leetcode/runner/init.lua     | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 3d7c5c74..705237ce 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -24,6 +24,7 @@
 ---| "enter"
 ---| "question_enter"
 ---| "leave"
+---| "submit"
 
 ---@alias lc.size
 ---| string
@@ -120,6 +121,9 @@ local M = {
 
         ---@type fun()[]
         ["leave"] = {},
+
+        ---@type fun(question: lc.ui.Question, buffer: string, status_msg: string|nil, success: string|nil)[]
+        ["submit"] = {},
     },
 
     keys = {
diff --git a/lua/leetcode/runner/init.lua b/lua/leetcode/runner/init.lua
index 69fd5438..12722200 100644
--- a/lua/leetcode/runner/init.lua
+++ b/lua/leetcode/runner/init.lua
@@ -4,6 +4,7 @@ local log = require("leetcode.logger")
 local interpreter = require("leetcode.api.interpreter")
 local config = require("leetcode.config")
 local Judge = require("leetcode.logger.spinner.judge")
+local utils = require("leetcode.utils")
 
 ---@type Path
 local leetbody = config.storage.cache:joinpath("body")
@@ -52,6 +53,7 @@ function Runner:handle(submit)
         end
 
         if item then
+            utils.exec_hooks("submit", question, body.typed_code, item.status_msg, item._.success)
             if item._.success then
                 judge:success(item.status_msg)
             else

From 606ac3d38d8dc29c34de49bdf7880c70e7f3d73b Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Dec 2025 14:30:49 -0800
Subject: [PATCH 02/24] fix: bundle entire item into the submit hook and
 delegate logic outside

---
 lua/leetcode/config/template.lua | 2 +-
 lua/leetcode/runner/init.lua     | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 705237ce..82230441 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -122,7 +122,7 @@ local M = {
         ---@type fun()[]
         ["leave"] = {},
 
-        ---@type fun(question: lc.ui.Question, buffer: string, status_msg: string|nil, success: string|nil)[]
+        ---@type fun(question: lc.ui.Question, buffer: string, item_json: table)[]
         ["submit"] = {},
     },
 
diff --git a/lua/leetcode/runner/init.lua b/lua/leetcode/runner/init.lua
index 12722200..e61a89ad 100644
--- a/lua/leetcode/runner/init.lua
+++ b/lua/leetcode/runner/init.lua
@@ -53,7 +53,10 @@ function Runner:handle(submit)
         end
 
         if item then
-            utils.exec_hooks("submit", question, body.typed_code, item.status_msg, item._.success)
+            -- print(vim.inspect(item))
+            -- utils.exec_hooks("submit", question, body.typed_code, item.status_msg, item._.success)
+            utils.exec_hooks("submit", question, body.typed_code, item)
+
             if item._.success then
                 judge:success(item.status_msg)
             else

From ec9c0a734aa541a865148f205871f36cf654ce9a Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 23 Feb 2026 00:15:15 -0800
Subject: [PATCH 03/24] feat: add upload commands for test and submit results
 with hook triggering

---
 lua/leetcode-ui/layout/console.lua |  4 ++--
 lua/leetcode/command/init.lua      | 20 ++++++++++++++++++++
 lua/leetcode/runner/init.lua       | 11 +++++++----
 3 files changed, 29 insertions(+), 6 deletions(-)

diff --git a/lua/leetcode-ui/layout/console.lua b/lua/leetcode-ui/layout/console.lua
index b7e88c01..92cab6e4 100644
--- a/lua/leetcode-ui/layout/console.lua
+++ b/lua/leetcode-ui/layout/console.lua
@@ -59,7 +59,7 @@ function ConsoleLayout:mount()
     })
 end
 
-function ConsoleLayout:run(submit)
+function ConsoleLayout:run(submit, trigger_hook)
     local range = self.question:editor_section_range("code")
     if not range:is_valid_or_log() then
         return
@@ -71,7 +71,7 @@ function ConsoleLayout:run(submit)
 
     self.result:focus()
 
-    Runner:init(self.question):run(submit)
+    Runner:init(self.question):run(submit, trigger_hook)
 end
 
 function ConsoleLayout:use_testcase()
diff --git a/lua/leetcode/command/init.lua b/lua/leetcode/command/init.lua
index 11824456..88fc11e1 100644
--- a/lua/leetcode/command/init.lua
+++ b/lua/leetcode/command/init.lua
@@ -277,6 +277,24 @@ function cmd.q_submit()
     end
 end
 
+function cmd.q_upload_test_result()
+    local utils = require("leetcode.utils")
+    utils.auth_guard()
+    local q = utils.curr_question()
+    if q then
+        q.console:run(false, true) -- test flow but trigger hook
+    end
+end
+
+function cmd.q_upload_submit_result()
+    local utils = require("leetcode.utils")
+    utils.auth_guard()
+    local q = utils.curr_question()
+    if q then
+        q.console:run(true, true) -- submit flow and trigger hook
+    end
+end
+
 function cmd.ui_skills()
     if config.is_cn then
         return
@@ -610,7 +628,9 @@ cmd.commands = {
     lang = { cmd.change_lang },
     run = { cmd.q_run },
     test = { cmd.q_run },
+    upload_test_result = { cmd.q_upload_test_result },
     submit = { cmd.q_submit },
+    upload_submit_result = { cmd.q_upload_submit_result },
     daily = { cmd.qot },
     yank = { cmd.yank },
     open = { cmd.open },
diff --git a/lua/leetcode/runner/init.lua b/lua/leetcode/runner/init.lua
index e61a89ad..170e503b 100644
--- a/lua/leetcode/runner/init.lua
+++ b/lua/leetcode/runner/init.lua
@@ -19,12 +19,13 @@ Runner.running = false
 
 ---@param self lc.Runner
 ---@param submit boolean
-Runner.run = vim.schedule_wrap(function(self, submit)
+---@param trigger_hook? boolean
+Runner.run = vim.schedule_wrap(function(self, submit, trigger_hook)
     if Runner.running then
         return log.warn("Runner is busy")
     end
 
-    local ok, err = pcall(Runner.handle, self, submit)
+    local ok, err = pcall(Runner.handle, self, submit, trigger_hook)
     if not ok then
         self:stop()
         log.error(err)
@@ -35,7 +36,7 @@ Runner.stop = function()
     Runner.running = false
 end
 
-function Runner:handle(submit)
+function Runner:handle(submit, trigger_hook)
     Runner.running = true
     local question = self.question
 
@@ -55,7 +56,9 @@ function Runner:handle(submit)
         if item then
             -- print(vim.inspect(item))
             -- utils.exec_hooks("submit", question, body.typed_code, item.status_msg, item._.success)
-            utils.exec_hooks("submit", question, body.typed_code, item)
+            if trigger_hook then
+                utils.exec_hooks("submit", question, body.typed_code, item)
+            end
 
             if item._.success then
                 judge:success(item.status_msg)

From c77b282c4ee425ec57e5a9b3ff2effd5810015a9 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 23 Feb 2026 01:09:37 -0800
Subject: [PATCH 04/24] feat: implement timer functionality with hooks for
 question sessions

---
 lua/leetcode-ui/question.lua     | 42 ++++++++++++++++++++++++++++++++
 lua/leetcode/command/init.lua    | 24 ++++++++++++++++++
 lua/leetcode/config/hooks.lua    |  8 ++++++
 lua/leetcode/config/template.lua |  8 +++++-
 lua/leetcode/runner/init.lua     |  4 +--
 5 files changed, 83 insertions(+), 3 deletions(-)

diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index a72ccafb..b3fb97b4 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -270,6 +270,9 @@ function Question:_unmount()
         return
     end
 
+    self:stop_timer_display()
+    utils.exec_hooks("question_leave", self)
+
     vim.schedule(function()
         self.info:unmount()
         self.console:unmount()
@@ -304,6 +307,45 @@ function Question:autocmds()
     })
 end
 
+function Question:start_timer_display()
+    self:stop_timer_display() -- reset if already running
+
+    local start_ms = vim.loop.hrtime() / 1e6 -- milliseconds
+
+    local function update_winbar()
+        local elapsed_s = math.floor((vim.loop.hrtime() / 1e6 - start_ms) / 1000)
+        local mins = math.floor(elapsed_s / 60)
+        local secs = elapsed_s % 60
+        local label = string.format(" ⏱ %02d:%02d", mins, secs)
+        vim.schedule(function()
+            if not (self.winid and vim.api.nvim_win_is_valid(self.winid)) then
+                self:stop_timer_display()
+                return
+            end
+            vim.api.nvim_set_option_value("winbar", label, { win = self.winid })
+        end)
+    end
+
+    update_winbar() -- render immediately
+    self._session_timer = vim.loop.new_timer()
+    self._session_timer:start(1000, 1000, update_winbar)
+end
+
+function Question:stop_timer_display()
+    if self._session_timer then
+        self._session_timer:stop()
+        if not self._session_timer:is_closing() then
+            self._session_timer:close()
+        end
+        self._session_timer = nil
+    end
+    vim.schedule(function()
+        if self.winid and vim.api.nvim_win_is_valid(self.winid) then
+            vim.api.nvim_set_option_value("winbar", "", { win = self.winid })
+        end
+    end)
+end
+
 function Question:handle_mount()
     self:create_buffer()
 
diff --git a/lua/leetcode/command/init.lua b/lua/leetcode/command/init.lua
index 88fc11e1..ee1c84d6 100644
--- a/lua/leetcode/command/init.lua
+++ b/lua/leetcode/command/init.lua
@@ -277,6 +277,24 @@ function cmd.q_submit()
     end
 end
 
+function cmd.timer_start()
+    local utils = require("leetcode.utils")
+    local q = utils.curr_question()
+    if not q then
+        return
+    end
+    utils.exec_hooks("timer_start", q)
+end
+
+function cmd.timer_stop()
+    local utils = require("leetcode.utils")
+    local q = utils.curr_question()
+    if not q then
+        return
+    end
+    utils.exec_hooks("question_leave", q)
+end
+
 function cmd.q_upload_test_result()
     local utils = require("leetcode.utils")
     utils.auth_guard()
@@ -631,6 +649,8 @@ cmd.commands = {
     upload_test_result = { cmd.q_upload_test_result },
     submit = { cmd.q_submit },
     upload_submit_result = { cmd.q_upload_submit_result },
+    timer_start = { cmd.timer_start },
+    timer_stop = { cmd.timer_stop },
     daily = { cmd.qot },
     yank = { cmd.yank },
     open = { cmd.open },
@@ -668,6 +688,10 @@ cmd.commands = {
         update = { cmd.cookie_prompt },
         delete = { cmd.sign_out },
     },
+    session = {
+        start = { cmd.timer_start },
+        stop = { cmd.timer_stop },
+    },
     cache = {
         update = { cmd.cache_update },
     },
diff --git a/lua/leetcode/config/hooks.lua b/lua/leetcode/config/hooks.lua
index 05b4406e..0d818654 100644
--- a/lua/leetcode/config/hooks.lua
+++ b/lua/leetcode/config/hooks.lua
@@ -12,4 +12,12 @@ hooks["question_enter"] = {
     end,
 }
 
+hooks["upload_submit_result"] = {}
+
+hooks["upload_test_result"] = {}
+
+hooks["timer_start"] = {}
+
+hooks["question_leave"] = {}
+
 return hooks
diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 82230441..5b990439 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -23,8 +23,11 @@
 ---@alias lc.hook
 ---| "enter"
 ---| "question_enter"
+---| "question_leave"
 ---| "leave"
----| "submit"
+---| "upload_submit_result"
+---| "upload_test_result"
+---| "timer_start"
 
 ---@alias lc.size
 ---| string
@@ -119,6 +122,9 @@ local M = {
         ---@type fun(question: lc.ui.Question)[]
         ["question_enter"] = {},
 
+        ---@type fun(question: lc.ui.Question)[]
+        ["question_leave"] = {},
+
         ---@type fun()[]
         ["leave"] = {},
 
diff --git a/lua/leetcode/runner/init.lua b/lua/leetcode/runner/init.lua
index 170e503b..ebb9fba3 100644
--- a/lua/leetcode/runner/init.lua
+++ b/lua/leetcode/runner/init.lua
@@ -55,9 +55,9 @@ function Runner:handle(submit, trigger_hook)
 
         if item then
             -- print(vim.inspect(item))
-            -- utils.exec_hooks("submit", question, body.typed_code, item.status_msg, item._.success)
             if trigger_hook then
-                utils.exec_hooks("submit", question, body.typed_code, item)
+                local hook_event = submit and "upload_submit_result" or "upload_test_result"
+                utils.exec_hooks(hook_event, question, body.typed_code, item)
             end
 
             if item._.success then

From e2891f5296e3477910bc15e9c10ba64104f51c49 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 23 Feb 2026 01:19:10 -0800
Subject: [PATCH 05/24] docs: update README to reflect extended features and
 new hooks for session management

---
 README.md | 604 +++++++++---------------------------------------------
 1 file changed, 102 insertions(+), 502 deletions(-)

diff --git a/README.md b/README.md
index efd575ca..6abb18c2 100644
--- a/README.md
+++ b/README.md
@@ -1,549 +1,149 @@
 <div align="center">
 
-# leetcode.nvim
+# 🍴 leetcode.nvim (Extended Fork)
 
-🔥 Solve [LeetCode] problems within [Neovim] 🔥
+**Extended hooks and external integration for [kawre/leetcode.nvim](https://github.com/kawre/leetcode.nvim)**
 
-<!-- 🇺🇸 English, 🇨🇳 <a href="README.zh.md">简体中文</a> -->
+The original project seems not be not actively maintained thats why i forked it
+Track problems, time spent, and submissions via external services.
 
 </div>
 
-https://github.com/kawre/leetcode.nvim/assets/69250723/aee6584c-e099-4409-b114-123cb32b7563
+## ✨ What's New
 
-## ✨ Features
+This fork adds submission tracking and session management capabilities to leetcode.nvim:
 
-- 📌 an intuitive dashboard for effortless navigation within [leetcode.nvim]
+- **Session Timer Commands**: `:Leet timer_start` / `:Leet timer_stop`
+- **Extended Hooks**: `timer_start`, `question_leave`, and improved `upload_submit_result` / `upload_test_result`
+- **External Integration**: Wire hooks to external APIs for persistence
+- **Bug Fix**: Resolved `nvim_win_is_valid` fast event crash in timer display
 
-- 😍 question description formatting for a better readability
+## 🎯 New Hooks
 
-- 📈 [LeetCode] profile statistics within [Neovim]
+Beyond the original hooks, this fork adds:
 
-- 🔀 support for daily and random questions
+| Hook | Signature | When |
+|------|-----------|------|
+| `timer_start` | `fun(question: lc.ui.Question)` | Session timer started (`:Leet session start`) |
+| `question_leave` | `fun(question: lc.ui.Question)` | Question window closed or session stopped |
 
-- 💾 caching for optimized performance
+Existing hooks also trigger on submissions:
 
-## 📬 Requirements
+| Hook | Signature | When |
+|------|-----------|------|
+| `upload_submit_result` | `fun(question, buffer, item_json)` | After `:Leet submit` |
+| `upload_test_result` | `fun(question, buffer, item_json)` | After `:Leet run` |
 
-- [Neovim] >= 0.9.0
+## 🛠️ New Commands
 
-- [Picker](#picker)
-
-- [plenary.nvim]
-
-- [nui.nvim]
-
-- [tree-sitter-html] _**(optional, but highly recommended)**_
-  used for formatting the question description.
-  Can be installed with [nvim-treesitter].
-
-- [Nerd Font][nerd-font] & [nvim-web-devicons] _**(optional)**_
-
-## 📦 Installation
-
-- [lazy.nvim]
-
-```lua
-{
-    "kawre/leetcode.nvim",
-    build = ":TSUpdate html", -- if you have `nvim-treesitter` installed
-    dependencies = {
-        -- include a picker of your choice, see picker section for more details
-        "nvim-lua/plenary.nvim",
-        "MunifTanjim/nui.nvim",
-    },
-    opts = {
-        -- configuration goes here
-    },
-}
+```vim
+:Leet timer_start          " Start tracking session time
+:Leet timer_stop           " Stop tracking (drop session without saving)
+:Leet session start        " Alias for timer_start
+:Leet session stop         " Alias for timer_stop
 ```
 
-## 🛠️ Configuration
-
-To see full configuration types see [template.lua](./lua/leetcode/config/template.lua)
+## 📡 External Integration Example
 
-### ⚙️ default configuration
+Connect to a submission server to save data:
 
 ```lua
-{
-    ---@type string
-    arg = "leetcode.nvim",
-
-    ---@type lc.lang
-    lang = "cpp",
+-- ~/.config/nvim/init.lua or plugin spec
+local db_saver = require("submission_db_saver")
 
-    cn = { -- leetcode.cn
-        enabled = false, ---@type boolean
-        translator = true, ---@type boolean
-        translate_problems = true, ---@type boolean
-    },
-
-    ---@type lc.storage
-    storage = {
-        home = vim.fn.stdpath("data") .. "/leetcode",
-        cache = vim.fn.stdpath("cache") .. "/leetcode",
-    },
-
-    ---@type table<string, boolean>
-    plugins = {
-        non_standalone = false,
-    },
-
-    ---@type boolean
-    logging = true,
-
-    injector = {}, ---@type table<lc.lang, lc.inject>
-
-    cache = {
-        update_interval = 60 * 60 * 24 * 7, ---@type integer 7 days
-    },
-
-    editor = {
-        reset_previous_code = true, ---@type boolean
-        fold_imports = true, ---@type boolean
-    },
-
-    console = {
-        open_on_runcode = true, ---@type boolean
-
-        dir = "row", ---@type lc.direction
-
-        size = { ---@type lc.size
-            width = "90%",
-            height = "75%",
-        },
-
-        result = {
-            size = "60%", ---@type lc.size
-        },
-
-        testcase = {
-            virt_text = true, ---@type boolean
-
-            size = "40%", ---@type lc.size
+return {
+    "kawre/leetcode.nvim",
+    opts = {
+        hooks = {
+            -- Track time on a problem
+            ["timer_start"] = {
+                function(question)
+                    db_saver.timer_start(question)
+                    question:start_timer_display()
+                end,
+            },
+            -- Clean up timer on close
+            ["question_leave"] = {
+                function(question)
+                    db_saver.drop_session(question)
+                end,
+            },
+            -- Save test runs
+            ["upload_test_result"] = {
+                function(question, buffer, item)
+                    db_saver.save_submission(question, buffer, item)
+                end,
+            },
+            -- Save final submissions
+            ["upload_submit_result"] = {
+                function(question, buffer, item)
+                    db_saver.save_submission(question, buffer, item)
+                end,
+            },
         },
     },
-
-    description = {
-        position = "left", ---@type lc.position
-
-        width = "40%", ---@type lc.size
-
-        show_stats = true, ---@type boolean
-    },
-
-    ---@type lc.picker
-    picker = { provider = nil },
-
-    hooks = {
-        ---@type fun()[]
-        ["enter"] = {},
-
-        ---@type fun(question: lc.ui.Question)[]
-        ["question_enter"] = {},
-
-        ---@type fun()[]
-        ["leave"] = {},
-    },
-
-    keys = {
-        toggle = { "q" }, ---@type string|string[]
-        confirm = { "<CR>" }, ---@type string|string[]
-
-        reset_testcases = "r", ---@type string
-        use_testcase = "U", ---@type string
-        focus_testcases = "H", ---@type string
-        focus_result = "L", ---@type string
-    },
-
-    ---@type lc.highlights
-    theme = {},
-
-    ---@type boolean
-    image_support = false,
 }
 ```
 
-### arg
+## 🖥️ Server API
 
-Argument for [Neovim]
+Expected server endpoints:
 
-```lua
----@type string
-arg = "leetcode.nvim"
 ```
-
-<small>See [usage](#-usage) for more info</small>
-
-### lang
-
-Language to start your session with
-
-```lua
----@type lc.lang
-lang = "cpp"
-```
-
-<details>
-  <summary>available languages</summary>
-
-| Language   | lang       |
-| ---------- | ---------- |
-| C++        | cpp        |
-| Java       | java       |
-| Python     | python     |
-| Python3    | python3    |
-| C          | c          |
-| C#         | csharp     |
-| JavaScript | javascript |
-| TypeScript | typescript |
-| PHP        | php        |
-| Swift      | swift      |
-| Kotlin     | kotlin     |
-| Dart       | dart       |
-| Go         | golang     |
-| Ruby       | ruby       |
-| Scala      | scala      |
-| Rust       | rust       |
-| Racket     | racket     |
-| Erlang     | erlang     |
-| Elixir     | elixir     |
-| Bash       | bash       |
-
-</details>
-
-### cn
-
-Use [leetcode.cn] instead of [leetcode.com][leetcode]
-
-```lua
-cn = { -- leetcode.cn
-    enabled = false, ---@type boolean
-    translator = true, ---@type boolean
-    translate_problems = true, ---@type boolean
-},
-```
-
-### storage
-
-storage directories
-
-```lua
----@type lc.storage
-storage = {
-    home = vim.fn.stdpath("data") .. "/leetcode",
-    cache = vim.fn.stdpath("cache") .. "/leetcode",
-},
-```
-
-### plugins
-
-[plugins list](#-plugins)
-
-```lua
----@type table<string, boolean>
-plugins = {
-    non_standalone = false,
-},
-```
-
-### logging
-
-Whether to log [leetcode.nvim] status notifications
-
-```lua
----@type boolean
-logging = true
-```
-
-### injector
-
-Inject code before or after your solution, injected code won't be submitted or run.
-
-Imports will be injected at the top of the buffer, automatically
-folded by default.
-
-```lua
-injector = { ---@type table<lc.lang, lc.inject>
-    ["python3"] = {
-        imports = function(default_imports)
-            vim.list_extend(default_imports, { "from .leetcode import *" })
-            return default_imports
-        end,
-        after = { "def test():", "    print('test')" },
-    },
-    ["cpp"] = {
-        imports = function()
-            -- return a different list to omit default imports
-            return { "#include <bits/stdc++.h>", "using namespace std;" }
-        end,
-        after = "int main() {}",
-    },
-},
+POST /api/session
+{
+    "action": "start_timer" | "drop_timer" | "save_submission",
+    "title_slug": "two-sum",
+    "content": "...",          // for save_submission
+    "item": {...}              // for save_submission
+}
 ```
 
-### picker
-
-Supported picker providers are:
-
-- [`snacks-picker`][snacks.nvim]
-- [`fzf-lua`][fzf-lua]
-- [`telescope`][telescope.nvim]
-- [`mini-picker`][mini-picker]
-
-If `provider` is `nil`, [leetcode.nvim] will try to resolve the first
-available one in the order above.
-
-```lua
----@type lc.picker
-picker = { provider = nil },
+Server should respond with:
+```json
+{
+    "success": true,
+    "action": "start_timer"
+}
 ```
 
-### hooks
-
-List of functions that get executed on specified event
+## 📝 Implementation Details
 
-```lua
-hooks = {
-    ---@type fun()[]
-    ["enter"] = {},
+### Files Modified
 
-    ---@type fun(question: lc.ui.Question)[]
-    ["question_enter"] = {},
+- `lua/leetcode/command/init.lua` - Added `timer_start` / `timer_stop` commands
+- `lua/leetcode/config/hooks.lua` - Registered new hook events
+- `lua/leetcode/config/template.lua` - Hook type aliases
+- `lua/leetcode-ui/question.lua` - Fire `question_leave` on unmount, fixed timer fast event bug
+- `packages/submission_server/src/submission_server.py` - Added `DROP_TIMER` action
+- `packages/submission_server/src/submission_db_saver.lua` - Added `timer_start()` and `drop_session()`
 
-    ---@type fun()[]
-    ["leave"] = {},
-},
-```
+### Usage Pattern
 
-### theme
+1. User runs `:Leet session start` → `timer_start` hook fires → server starts session timer
+2. User closes question or runs `:Leet session stop` → `question_leave` hook fires → server drops timer
+3. User submits code → `upload_submit_result` hook fires → server saves submission
+4. Time and submissions are persisted in external database
 
-Override the [default theme](./lua/leetcode/theme/default.lua).
+## 🔧 Installation
 
-Each value is the same type as val parameter in `:help nvim_set_hl`
+Use this fork instead of the original:
 
 ```lua
----@type lc.highlights
-theme = {
-    ["alt"] = {
-        bg = "#FFFFFF",
+{
+    "jingyi-zhao-01/leetcode.nvim",  -- or your fork
+    build = ":TSUpdate html",
+    dependencies = {
+        "nvim-lua/plenary.nvim",
+        "MunifTanjim/nui.nvim",
     },
-    ["normal"] = {
-        fg = "#EA4AAA",
+    opts = {
+        -- See hooks example above
     },
-},
-```
-
-### image support
-
-Whether to render question description images using [image.nvim]
-
-> [!WARNING]
-> Enabling this will disable question description wrap,
-> because of https://github.com/3rd/image.nvim/issues/62#issuecomment-1778082534
-
-```lua
----@type boolean
-image_support = false,
-```
-
-## 📋 Commands
-
-### `Leet` opens menu dashboard
-
-- `menu` same as `Leet`
-
-- `exit` close [leetcode.nvim]
-
-- `console` opens console pop-up for currently opened question
-
-- `info` opens a pop-up containing information about the currently opened question
-
-- `tabs` opens a picker with all currently opened question tabs
-
-- `yank` yanks the code section
-
-- `lang` opens a picker to change the language of the current question
-
-- `run` run currently opened question
-
-- `test` same as `Leet run`
-
-- `submit` submit currently opened question
-
-- `random` opens a random question
-
-- `daily` opens the question of today problem
-
-- `list` opens a picker with all available leetcode problems
-
-- `open` opens the current question in a default browser
-
-- `restore` try to restore default question layout
-
-- `last_submit` tries to replace the editor code section with the latest submitted code
-
-- `reset` resets editor code section to the default snippet
-
-- `inject` re-injects editor code, keeping the code section intact
-
-- `fold` applies folding to the current question imports section
-
-<!-- - `session` -->
-<!--   - `create` create a new session -->
-<!--   - `change` change the current session -->
-<!---->
-<!--   - `update` update the current session in case it went out of sync -->
-
-- `desc` toggle question description
-  - `toggle` same as `Leet desc`
-
-  - `stats` toggle description stats visibility
-
-- `cookie`
-  - `update` opens a prompt to enter a new cookie
-
-  - `delete` deletes stored cookie and logs out of [leetcode.nvim]
-
-- `cache`
-  - `update` fetches all available problems and updates the local cache of [leetcode.nvim]
-
-#### Some commands can take optional arguments. To stack argument values separate them by a `,`
-
-- `Leet list`
-
-  ```
-  Leet list status=<status> difficulty=<difficulty>
-  ```
-
-- `Leet random`
-
-  ```
-  Leet random status=<status> difficulty=<difficulty> tags=<tags>
-  ```
-
-## 🚀 Usage
-
-This plugin can be initiated in two ways:
-
-- To start [leetcode.nvim], simply pass [`arg`](#arg)
-  as the _first and **only**_ [Neovim] argument
-
-  ```
-  nvim leetcode.nvim
-  ```
-
-- Use `:Leet` command to open [leetcode.nvim]
-  within your preferred dashboard plugin. The only requirement is that [Neovim]
-  must not have any listed buffers open.
-  To bypass this requirement use [`non_standalone`](#non-standalone-mode) plugin.
-
-### Sign In
-
-> [!WARNING]
-> Be sure to copy the `Cookie` from request headers, not the `set-cookie` from
-> response headers.
-
-> [!WARNING]
-> If you are using **brave browser**, see [this
-> issue](https://github.com/kawre/leetcode.nvim/issues/160#issuecomment-2619611920)
-
-https://github.com/kawre/leetcode.nvim/assets/69250723/b7be8b95-5e2c-4153-8845-4ad3abeda5c3
-
-## ❓ FAQ
-
-### I keep getting `cookie expired` error
-
-If you keep getting `Your cookie may have expired, or LeetCode has temporarily
-restricted API access`, it most likely means that LeetCode website is under
-heavy load and is restricting API access (mostly during contests).
-
-All you can do is wait it out, try disabling a VPN if you’re using one, and if
-the problem is persistent, open an issue.
-
-### Switching between test cases
-
-To switch between test cases, just press the number of the corresponding case:  
-`1` for `Case (1)`, `2` for `Case (2)`, and so on.
-
-### Switching between questions
-
-To switch between questions, use `Leet tabs`
-
-### I'm not getting LSP completions
-
-Some languages require additional setup to get LSP completions.  
-For example, Rust needs extra configuration — see [this issue](https://github.com/kawre/leetcode.nvim/issues/86).
-
-## 🍴 Recipes
-
-### 💤 lazy loading with [lazy.nvim]
-
-> [!WARNING]
-> opting for either option makes the alternative
-> launch method unavailable due to lazy loading
-
-- with [`arg`](#arg)
-
-  ```lua
-  local leet_arg = "leetcode.nvim"
-  ```
-
-  ```lua
-  {
-      "kawre/leetcode.nvim",
-      lazy = leet_arg ~= vim.fn.argv(0, -1),
-      opts = { arg = leet_arg },
-  }
-  ```
-
-- with `:Leet`
-
-  ```lua
-  {
-      "kawre/leetcode.nvim",
-      cmd = "Leet",
-  }
-  ```
-
-### 🪟 Windows
-
-If you are using Windows,
-it is recommended to use [Cygwin](https://www.cygwin.com/) for a more consistent and Unix-like experience.
-
-## 🧩 Plugins
-
-### Non-Standalone mode
-
-To run [leetcode.nvim] in a non-standalone mode (i.e. not with argument or an empty Neovim session),
-enable the `non_standalone` plugin in your config:
-
-```lua
-plugins = {
-    non_standalone = true,
 }
 ```
 
-You can then exit [leetcode.nvim] using `:Leet exit` command
-
-## 🙌 Credits
-
-- [Leetbuddy.nvim](https://github.com/Dhanus3133/Leetbuddy.nvim)
-
-- [alpha-nvim](https://github.com/goolord/alpha-nvim)
-
-[image.nvim]: https://github.com/3rd/image.nvim
-[lazy.nvim]: https://github.com/folke/lazy.nvim
-[leetcode]: https://leetcode.com
-[leetcode.cn]: https://leetcode.cn
-[leetcode.nvim]: https://github.com/kawre/leetcode.nvim
-[neovim]: https://github.com/neovim/neovim
-[nerd-font]: https://www.nerdfonts.com
-[nui.nvim]: https://github.com/MunifTanjim/nui.nvim
-[nvim-treesitter]: https://github.com/nvim-treesitter/nvim-treesitter
-[nvim-web-devicons]: https://github.com/nvim-tree/nvim-web-devicons
-[telescope.nvim]: https://github.com/nvim-telescope/telescope.nvim
-[fzf-lua]: https://github.com/ibhagwan/fzf-lua
-[snacks.nvim]: https://github.com/folke/snacks.nvim
-[tree-sitter-html]: https://github.com/tree-sitter/tree-sitter-html
-[plenary.nvim]: https://github.com/nvim-lua/plenary.nvim
-[mini-picker]: https://github.com/nvim-mini/mini.pick
+## 📚 Refer to Original
+
+For core leetcode.nvim features, installation, and configuration, see:
+https://github.com/kawre/leetcode.nvim

From 2eca73feffbd884cdfd8217440c1f43f07138622 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 23 Feb 2026 01:28:10 -0800
Subject: [PATCH 06/24] - hightlight thought sytnax in the question buffer

---
 lua/leetcode-ui/question.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index b3fb97b4..a5fa5e34 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -135,7 +135,7 @@ function Question:open_buffer(existed)
     ui_utils.buf_set_opts(self.bufnr, { buflisted = true })
     ui_utils.win_set_buf(self.winid, self.bufnr, true)
 
-    vim.cmd([[match DiagnosticHint /@leet/]])
+    vim.cmd([[match DiagnosticHint /@leet\|@thought/]])
 
     if config.user.editor.fold_imports then
         self:editor_fold_imports(false)

From 28f2383a5a4bbfc7b2f62d392ff33a6f79248d30 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Tue, 24 Feb 2026 20:35:08 -0800
Subject: [PATCH 07/24] feat: implement timer stop hook and update related
 commands

---
 lua/leetcode-ui/question.lua     | 2 +-
 lua/leetcode/command/init.lua    | 2 +-
 lua/leetcode/config/hooks.lua    | 6 ++++++
 lua/leetcode/config/template.lua | 1 +
 4 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index a5fa5e34..327dfcf1 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -270,7 +270,7 @@ function Question:_unmount()
         return
     end
 
-    self:stop_timer_display()
+    utils.exec_hooks("timer_stop", self)
     utils.exec_hooks("question_leave", self)
 
     vim.schedule(function()
diff --git a/lua/leetcode/command/init.lua b/lua/leetcode/command/init.lua
index ee1c84d6..99144c54 100644
--- a/lua/leetcode/command/init.lua
+++ b/lua/leetcode/command/init.lua
@@ -292,7 +292,7 @@ function cmd.timer_stop()
     if not q then
         return
     end
-    utils.exec_hooks("question_leave", q)
+    utils.exec_hooks("timer_stop", q)
 end
 
 function cmd.q_upload_test_result()
diff --git a/lua/leetcode/config/hooks.lua b/lua/leetcode/config/hooks.lua
index 0d818654..5139c1b5 100644
--- a/lua/leetcode/config/hooks.lua
+++ b/lua/leetcode/config/hooks.lua
@@ -18,6 +18,12 @@ hooks["upload_test_result"] = {}
 
 hooks["timer_start"] = {}
 
+hooks["timer_stop"] = {
+    function(q)
+        q:stop_timer_display()
+    end,
+}
+
 hooks["question_leave"] = {}
 
 return hooks
diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 5b990439..35b37b7f 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -28,6 +28,7 @@
 ---| "upload_submit_result"
 ---| "upload_test_result"
 ---| "timer_start"
+---| "timer_stop"
 
 ---@alias lc.size
 ---| string

From a9def5aa10274a68f5d06a82dae6f869a3eec8a8 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Wed, 25 Feb 2026 00:56:05 -0800
Subject: [PATCH 08/24] - feat: add timer color

---
 lua/leetcode-ui/question.lua   | 2 +-
 lua/leetcode/theme/default.lua | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index 327dfcf1..5fd9abee 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -316,7 +316,7 @@ function Question:start_timer_display()
         local elapsed_s = math.floor((vim.loop.hrtime() / 1e6 - start_ms) / 1000)
         local mins = math.floor(elapsed_s / 60)
         local secs = elapsed_s % 60
-        local label = string.format(" ⏱ %02d:%02d", mins, secs)
+        local label = string.format(" %%#leetcode_timer#⏱ %02d:%02d%%*", mins, secs)
         vim.schedule(function()
             if not (self.winid and vim.api.nvim_win_is_valid(self.winid)) then
                 self:stop_timer_display()
diff --git a/lua/leetcode/theme/default.lua b/lua/leetcode/theme/default.lua
index 5eb22761..942d40e9 100644
--- a/lua/leetcode/theme/default.lua
+++ b/lua/leetcode/theme/default.lua
@@ -32,6 +32,7 @@ M.get = function()
         easy = { fg = "#46c6c2" },
         medium = { fg = "#fac31d" },
         hard = { fg = "#f8615c" },
+        timer = { fg = "#f8615c" },
 
         easy_alt = { fg = "#294d35" },
         medium_alt = { fg = "#5e4e25" },

From 551343301036278cdf7d2a9707baa91acf43cc01 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 25 May 2026 00:51:43 -0700
Subject: [PATCH 09/24] feat: implement leave hooks for timer management and
 enhance hook execution

---
 lua/leetcode-ui/question.lua  | 33 ++++++++++++++++++++++++++++++---
 lua/leetcode/config/hooks.lua | 17 +++++++++++++++--
 lua/leetcode/utils.lua        |  2 ++
 3 files changed, 47 insertions(+), 5 deletions(-)

diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index 5fd9abee..28456c48 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -266,13 +266,12 @@ function Question:injector(code)
 end
 
 function Question:_unmount()
+    self:run_leave_hooks()
+
     if vim.v.dying ~= 0 then
         return
     end
 
-    utils.exec_hooks("timer_stop", self)
-    utils.exec_hooks("question_leave", self)
-
     vim.schedule(function()
         self.info:unmount()
         self.console:unmount()
@@ -297,6 +296,17 @@ function Question:unmount()
 end
 
 local group = vim.api.nvim_create_augroup("leetcode_questions", { clear = true })
+
+function Question:run_leave_hooks()
+    if self._leave_hooks_ran then
+        return
+    end
+
+    self._leave_hooks_ran = true
+    utils.exec_hooks("timer_stop", self)
+    utils.exec_hooks("question_leave", self)
+end
+
 function Question:autocmds()
     vim.api.nvim_create_autocmd("WinClosed", {
         group = group,
@@ -305,6 +315,23 @@ function Question:autocmds()
             self:_unmount()
         end,
     })
+
+    vim.api.nvim_create_autocmd("TabLeave", {
+        group = group,
+        callback = function()
+            local tabp = utils.question_tabp(self)
+            if tabp and tabp == vim.api.nvim_get_current_tabpage() and self._session_timer then
+                utils.exec_hooks("timer_stop", self)
+            end
+        end,
+    })
+
+    vim.api.nvim_create_autocmd("VimLeavePre", {
+        group = group,
+        callback = function()
+            self:run_leave_hooks()
+        end,
+    })
 end
 
 function Question:start_timer_display()
diff --git a/lua/leetcode/config/hooks.lua b/lua/leetcode/config/hooks.lua
index 5139c1b5..7303a956 100644
--- a/lua/leetcode/config/hooks.lua
+++ b/lua/leetcode/config/hooks.lua
@@ -10,13 +10,26 @@ hooks["question_enter"] = {
             end)
         end
     end,
+    function(q)
+        require("leetcode.utils").exec_hooks("timer_start", q)
+    end,
 }
 
-hooks["upload_submit_result"] = {}
+hooks["upload_submit_result"] = {
+    function(q, _, item)
+        if item and item._ and item._.success then
+            require("leetcode.utils").exec_hooks("timer_stop", q)
+        end
+    end,
+}
 
 hooks["upload_test_result"] = {}
 
-hooks["timer_start"] = {}
+hooks["timer_start"] = {
+    function(q)
+        q:start_timer_display()
+    end,
+}
 
 hooks["timer_stop"] = {
     function(q)
diff --git a/lua/leetcode/utils.lua b/lua/leetcode/utils.lua
index e2d9b1b5..ac0cf57c 100644
--- a/lua/leetcode/utils.lua
+++ b/lua/leetcode/utils.lua
@@ -93,6 +93,8 @@ function utils.get_hooks(event)
 
     if type(fns) == "function" then
         fns = { fns }
+    else
+        fns = vim.deepcopy(fns)
     end
 
     return vim.list_extend(fns, config.hooks[event] or {})

From 3bd9b7d59f97c91db401dd0036bedacd9b555774 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 25 May 2026 05:28:12 -0700
Subject: [PATCH 10/24] feat: add on_test_result hook and update related
 commands for improved submission tracking

---
 README.md                        |  7 ++++---
 lua/leetcode/command/init.lua    |  8 ++++----
 lua/leetcode/config/hooks.lua    |  2 ++
 lua/leetcode/config/template.lua | 15 ++++++++++++++-
 lua/leetcode/runner/init.lua     | 17 ++++++++++-------
 5 files changed, 34 insertions(+), 15 deletions(-)

diff --git a/README.md b/README.md
index 6abb18c2..94eb960f 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Track problems, time spent, and submissions via external services.
 This fork adds submission tracking and session management capabilities to leetcode.nvim:
 
 - **Session Timer Commands**: `:Leet timer_start` / `:Leet timer_stop`
-- **Extended Hooks**: `timer_start`, `question_leave`, and improved `upload_submit_result` / `upload_test_result`
+- **Extended Hooks**: `timer_start`, `question_leave`, `on_test_result`, and improved upload hooks
 - **External Integration**: Wire hooks to external APIs for persistence
 - **Bug Fix**: Resolved `nvim_win_is_valid` fast event crash in timer display
 
@@ -31,8 +31,9 @@ Existing hooks also trigger on submissions:
 
 | Hook | Signature | When |
 |------|-----------|------|
+| `on_test_result` | `fun(question, buffer, item_json)` | After `:Leet run` / `:Leet test` |
 | `upload_submit_result` | `fun(question, buffer, item_json)` | After `:Leet submit` |
-| `upload_test_result` | `fun(question, buffer, item_json)` | After `:Leet run` |
+| `upload_test_result` | `fun(question, buffer, item_json)` | After `:Leet upload_test_result` |
 
 ## 🛠️ New Commands
 
@@ -69,7 +70,7 @@ return {
                 end,
             },
             -- Save test runs
-            ["upload_test_result"] = {
+            ["on_test_result"] = {
                 function(question, buffer, item)
                     db_saver.save_submission(question, buffer, item)
                 end,
diff --git a/lua/leetcode/command/init.lua b/lua/leetcode/command/init.lua
index 99144c54..e0bc3eca 100644
--- a/lua/leetcode/command/init.lua
+++ b/lua/leetcode/command/init.lua
@@ -264,7 +264,7 @@ function cmd.q_run()
     utils.auth_guard()
     local q = utils.curr_question()
     if q then
-        q.console:run()
+        q.console:run(false, "on_test_result")
     end
 end
 
@@ -273,7 +273,7 @@ function cmd.q_submit()
     utils.auth_guard()
     local q = utils.curr_question()
     if q then
-        q.console:run(true)
+        q.console:run(true, "upload_submit_result")
     end
 end
 
@@ -300,7 +300,7 @@ function cmd.q_upload_test_result()
     utils.auth_guard()
     local q = utils.curr_question()
     if q then
-        q.console:run(false, true) -- test flow but trigger hook
+        q.console:run(false, "upload_test_result")
     end
 end
 
@@ -309,7 +309,7 @@ function cmd.q_upload_submit_result()
     utils.auth_guard()
     local q = utils.curr_question()
     if q then
-        q.console:run(true, true) -- submit flow and trigger hook
+        q.console:run(true, "upload_submit_result")
     end
 end
 
diff --git a/lua/leetcode/config/hooks.lua b/lua/leetcode/config/hooks.lua
index 7303a956..dcd3751f 100644
--- a/lua/leetcode/config/hooks.lua
+++ b/lua/leetcode/config/hooks.lua
@@ -25,6 +25,8 @@ hooks["upload_submit_result"] = {
 
 hooks["upload_test_result"] = {}
 
+hooks["on_test_result"] = {}
+
 hooks["timer_start"] = {
     function(q)
         q:start_timer_display()
diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 35b37b7f..de9f0533 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -25,6 +25,7 @@
 ---| "question_enter"
 ---| "question_leave"
 ---| "leave"
+---| "on_test_result"
 ---| "upload_submit_result"
 ---| "upload_test_result"
 ---| "timer_start"
@@ -130,7 +131,19 @@ local M = {
         ["leave"] = {},
 
         ---@type fun(question: lc.ui.Question, buffer: string, item_json: table)[]
-        ["submit"] = {},
+        ["on_test_result"] = {},
+
+        ---@type fun(question: lc.ui.Question, buffer: string, item_json: table)[]
+        ["upload_submit_result"] = {},
+
+        ---@type fun(question: lc.ui.Question, buffer: string, item_json: table)[]
+        ["upload_test_result"] = {},
+
+        ---@type fun(question: lc.ui.Question)[]
+        ["timer_start"] = {},
+
+        ---@type fun(question: lc.ui.Question)[]
+        ["timer_stop"] = {},
     },
 
     keys = {
diff --git a/lua/leetcode/runner/init.lua b/lua/leetcode/runner/init.lua
index ebb9fba3..aca2c311 100644
--- a/lua/leetcode/runner/init.lua
+++ b/lua/leetcode/runner/init.lua
@@ -19,13 +19,13 @@ Runner.running = false
 
 ---@param self lc.Runner
 ---@param submit boolean
----@param trigger_hook? boolean
-Runner.run = vim.schedule_wrap(function(self, submit, trigger_hook)
+---@param hook_event? lc.hook|boolean
+Runner.run = vim.schedule_wrap(function(self, submit, hook_event)
     if Runner.running then
         return log.warn("Runner is busy")
     end
 
-    local ok, err = pcall(Runner.handle, self, submit, trigger_hook)
+    local ok, err = pcall(Runner.handle, self, submit, hook_event)
     if not ok then
         self:stop()
         log.error(err)
@@ -36,7 +36,7 @@ Runner.stop = function()
     Runner.running = false
 end
 
-function Runner:handle(submit, trigger_hook)
+function Runner:handle(submit, hook_event)
     Runner.running = true
     local question = self.question
 
@@ -55,9 +55,12 @@ function Runner:handle(submit, trigger_hook)
 
         if item then
             -- print(vim.inspect(item))
-            if trigger_hook then
-                local hook_event = submit and "upload_submit_result" or "upload_test_result"
-                utils.exec_hooks(hook_event, question, body.typed_code, item)
+            if hook_event then
+                local event = hook_event
+                if hook_event == true then
+                    event = submit and "upload_submit_result" or "upload_test_result"
+                end
+                utils.exec_hooks(event, question, body.typed_code, item)
             end
 
             if item._.success then

From 0fda2d5a672744f8b62fe757d61dd7d7ec35b4bd Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 25 May 2026 14:45:53 -0700
Subject: [PATCH 11/24] feat: add submission side panel and hooks for past
 submissions tracking

---
 README.md                             |  17 +-
 lua/leetcode-ui/question.lua          |  18 +++
 lua/leetcode-ui/split/submissions.lua | 213 ++++++++++++++++++++++++++
 lua/leetcode/config/hooks.lua         |   2 +
 lua/leetcode/config/template.lua      |  10 ++
 sample.leetcode.lua                   |   1 +
 6 files changed, 260 insertions(+), 1 deletion(-)
 create mode 100644 lua/leetcode-ui/split/submissions.lua
 create mode 120000 sample.leetcode.lua

diff --git a/README.md b/README.md
index 94eb960f..f29823f7 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ This fork adds submission tracking and session management capabilities to leetco
 
 - **Session Timer Commands**: `:Leet timer_start` / `:Leet timer_stop`
 - **Extended Hooks**: `timer_start`, `question_leave`, `on_test_result`, and improved upload hooks
+- **Submission Side Panel**: Optional left-bottom panel for past submissions
 - **External Integration**: Wire hooks to external APIs for persistence
 - **Bug Fix**: Resolved `nvim_win_is_valid` fast event crash in timer display
 
@@ -24,6 +25,7 @@ Beyond the original hooks, this fork adds:
 
 | Hook | Signature | When |
 |------|-----------|------|
+| `problem_description_open` | `fun(question: lc.ui.Question)` | After the problem description buffer mounts |
 | `timer_start` | `fun(question: lc.ui.Question)` | Session timer started (`:Leet session start`) |
 | `question_leave` | `fun(question: lc.ui.Question)` | Question window closed or session stopped |
 
@@ -55,6 +57,13 @@ local db_saver = require("submission_db_saver")
 return {
     "kawre/leetcode.nvim",
     opts = {
+        description = {
+            submissions = {
+                enabled = true,
+                height = "28%",
+                limit = 10,
+            },
+        },
         hooks = {
             -- Track time on a problem
             ["timer_start"] = {
@@ -63,6 +72,11 @@ return {
                     question:start_timer_display()
                 end,
             },
+            ["problem_description_open"] = {
+                function(question)
+                    db_saver.show_past_submissions(question, 10)
+                end,
+            },
             -- Clean up timer on close
             ["question_leave"] = {
                 function(question)
@@ -93,8 +107,9 @@ Expected server endpoints:
 ```
 POST /api/session
 {
-    "action": "start_timer" | "drop_timer" | "save_submission",
+    "action": "start_timer" | "drop_timer" | "save_submission" | "get_past_submissions",
     "title_slug": "two-sum",
+    "limit": 10,               // optional, for get_past_submissions
     "content": "...",          // for save_submission
     "item": {...}              // for save_submission
 }
diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index 28456c48..505e6014 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -1,4 +1,5 @@
 local Description = require("leetcode-ui.split.description")
+local Submissions = require("leetcode-ui.split.submissions")
 local Console = require("leetcode-ui.layout.console")
 local Info = require("leetcode-ui.popup.info")
 local Object = require("nui.object")
@@ -15,6 +16,7 @@ local log = require("leetcode.logger")
 ---@field file Path
 ---@field q lc.question_res
 ---@field description lc.ui.Description
+---@field submissions? lc.ui.Submissions
 ---@field bufnr integer
 ---@field console lc.ui.Console
 ---@field lang string
@@ -275,6 +277,9 @@ function Question:_unmount()
     vim.schedule(function()
         self.info:unmount()
         self.console:unmount()
+        if self.submissions then
+            self.submissions:unmount()
+        end
         self.description:unmount()
 
         if self.bufnr and vim.api.nvim_buf_is_valid(self.bufnr) then
@@ -377,6 +382,11 @@ function Question:handle_mount()
     self:create_buffer()
 
     self.description = Description(self):mount()
+    if config.user.description.submissions.enabled then
+        self.submissions = Submissions(self):mount()
+    end
+    utils.exec_hooks("problem_description_open", self)
+
     self.console = Console(self)
     self.info = Info(self)
 
@@ -388,6 +398,14 @@ function Question:handle_mount()
     return self
 end
 
+---@param submissions table[]
+function Question:set_past_submissions(submissions)
+    self.past_submissions = submissions or {}
+    if self.submissions then
+        self.submissions:update_submissions(self.past_submissions)
+    end
+end
+
 function Question:mount()
     local tabp = utils.detect_duplicate_question(self.cache.title_slug, config.lang)
     if tabp then
diff --git a/lua/leetcode-ui/split/submissions.lua b/lua/leetcode-ui/split/submissions.lua
new file mode 100644
index 00000000..51cdcbad
--- /dev/null
+++ b/lua/leetcode-ui/split/submissions.lua
@@ -0,0 +1,213 @@
+local config = require("leetcode.config")
+
+local Group = require("leetcode-ui.group")
+local Line = require("leetcode-ui.line")
+local Padding = require("leetcode-ui.lines.padding")
+local Split = require("leetcode-ui.split")
+
+---@class lc.ui.Submissions : lc-ui.Split
+---@field question lc.ui.Question
+---@field state "loading"|"ready"|"empty"|"error"
+---@field submissions table[]
+---@field message? string
+local Submissions = Split:extend("LeetSubmissions")
+
+local function debug_log(msg)
+    vim.schedule(function()
+        vim.fn.histadd("message", "[submissions_panel] " .. msg)
+    end)
+end
+
+local function status_hl(status)
+    if status == "Accepted" then
+        return "leetcode_easy"
+    end
+
+    if status == "Wrong Answer" or status == "Runtime Error" or status == "Time Limit Exceeded" then
+        return "leetcode_hard"
+    end
+
+    return "leetcode_normal"
+end
+
+local function trim_timestamp(timestamp)
+    if not timestamp or timestamp == "" then
+        return "unknown"
+    end
+
+    return timestamp:gsub(" %u+$", "")
+end
+
+function Submissions:populate()
+    local layout = Group({}, {
+        padding = {
+            left = 1,
+            right = 1,
+            top = 1,
+        },
+    })
+
+    local header = Line()
+    header:append("Past Submissions", "leetcode_medium")
+    layout:insert(header)
+    layout:insert(Padding(1))
+
+    if self.state == "loading" then
+        local line = Line()
+        line:append("Loading submissions...", "leetcode_alt")
+        layout:insert(line)
+    elseif self.state == "error" then
+        local line = Line()
+        line:append(self.message or "Submission service unavailable", "leetcode_hard")
+        layout:insert(line)
+    elseif self.state == "empty" then
+        local line = Line()
+        line:append("No past submissions yet", "leetcode_alt")
+        layout:insert(line)
+    else
+        for index, submission in ipairs(self.submissions) do
+            local title = Line()
+            title:append(("%d. "):format(index), "leetcode_list")
+            title:append(trim_timestamp(submission.submitted_at_pst), "leetcode_alt")
+            layout:insert(title)
+
+            local details = Line()
+            details:append("result=", "leetcode_list")
+            details:append(submission.submit_result or "Unknown", status_hl(submission.submit_result))
+            details:append("  time=", "leetcode_list")
+
+            local time_spent = submission.time_spent_minutes
+            if time_spent == nil or time_spent == vim.NIL then
+                details:append("n/a", "leetcode_alt")
+            else
+                details:append(("%sm"):format(time_spent), "leetcode_normal")
+            end
+
+            details:append("  test=", "leetcode_list")
+            details:append(submission.is_test and "yes" or "no", submission.is_test and "leetcode_medium" or "leetcode_normal")
+            layout:insert(details)
+
+            if index < #self.submissions then
+                layout:insert(Padding(1))
+            end
+        end
+    end
+
+    self.renderer:replace({ layout })
+end
+
+function Submissions:draw()
+    self:populate()
+    Submissions.super.draw(self)
+end
+
+function Submissions:set_loading()
+    debug_log("set_loading")
+    self.state = "loading"
+    self.message = nil
+    self.submissions = {}
+    self:draw()
+end
+
+---@param msg string
+function Submissions:set_error(msg)
+    debug_log("set_error " .. tostring(msg))
+    self.state = "error"
+    self.message = msg
+    self.submissions = {}
+    self:draw()
+end
+
+---@param submissions table[]
+function Submissions:update_submissions(submissions)
+    debug_log("update_submissions count=" .. tostring(submissions and #submissions or 0))
+    self.submissions = submissions or {}
+    self.message = nil
+    self.state = vim.tbl_isempty(self.submissions) and "empty" or "ready"
+    self:draw()
+end
+
+function Submissions:fetch()
+    debug_log("fetch begin for " .. self.question.q.title_slug)
+    self:set_loading()
+
+    local ok, saver = pcall(require, "submission_db_saver")
+    if not ok then
+        self:set_error("submission_db_saver.lua not found")
+        return
+    end
+
+    saver.get_past_submissions(self.question, function(response)
+        vim.schedule(function()
+            if not self._.mounted then
+                debug_log("callback ignored because panel unmounted")
+                return
+            end
+
+            debug_log("callback response=" .. vim.inspect(response))
+            if response.error then
+                self:set_error(response.error)
+                return
+            end
+
+            local submissions = response.submissions or {}
+            self.question.past_submissions = submissions
+            self:update_submissions(submissions)
+        end)
+    end, config.user.description.submissions.limit)
+end
+
+function Submissions:mount()
+    Submissions.super.mount(self)
+    self:fetch()
+
+    local ui_utils = require("leetcode-ui.utils")
+    ui_utils.buf_set_opts(self.bufnr, {
+        modifiable = false,
+        buflisted = false,
+        swapfile = false,
+        buftype = "nofile",
+        filetype = config.name,
+    })
+    ui_utils.win_set_opts(self.winid, {
+        winhighlight = "Normal:NormalFloat,FloatBorder:FloatBorder",
+        wrap = false,
+        colorcolumn = "",
+        foldcolumn = "0",
+        cursorcolumn = false,
+        cursorline = false,
+        number = false,
+        relativenumber = false,
+        list = false,
+        spell = false,
+        signcolumn = "no",
+        linebreak = false,
+    })
+    ui_utils.win_set_winfixbuf(self.winid)
+
+    self:draw()
+    return self
+end
+
+---@param parent lc.ui.Question
+function Submissions:init(parent)
+    Submissions.super.init(self, {
+        relative = {
+            type = "win",
+            winid = parent.description.winid,
+        },
+        position = "bottom",
+        size = config.user.description.submissions.height,
+        enter = false,
+        focusable = true,
+    })
+
+    self.question = parent
+    self.state = "loading"
+    self.submissions = parent.past_submissions or {}
+end
+
+---@type fun(parent: lc.ui.Question): lc.ui.Submissions
+local LeetSubmissions = Submissions
+
+return LeetSubmissions
diff --git a/lua/leetcode/config/hooks.lua b/lua/leetcode/config/hooks.lua
index dcd3751f..aa394573 100644
--- a/lua/leetcode/config/hooks.lua
+++ b/lua/leetcode/config/hooks.lua
@@ -1,6 +1,8 @@
 ---@class lc.Hooks
 local hooks = {}
 
+hooks["problem_description_open"] = {}
+
 hooks["question_enter"] = {
     function(q)
         -- https://github.com/kawre/leetcode.nvim/issues/14
diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index de9f0533..4a06998e 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -22,6 +22,7 @@
 
 ---@alias lc.hook
 ---| "enter"
+---| "problem_description_open"
 ---| "question_enter"
 ---| "question_leave"
 ---| "leave"
@@ -112,6 +113,12 @@ local M = {
         width = "40%", ---@type lc.size
 
         show_stats = true, ---@type boolean
+
+        submissions = {
+            enabled = true, ---@type boolean
+            height = 10, ---@type lc.size
+            limit = 10, ---@type integer
+        },
     },
 
     ---@type lc.picker
@@ -121,6 +128,9 @@ local M = {
         ---@type fun()[]
         ["enter"] = {},
 
+        ---@type fun(question: lc.ui.Question)[]
+        ["problem_description_open"] = {},
+
         ---@type fun(question: lc.ui.Question)[]
         ["question_enter"] = {},
 
diff --git a/sample.leetcode.lua b/sample.leetcode.lua
new file mode 120000
index 00000000..2bf9b741
--- /dev/null
+++ b/sample.leetcode.lua
@@ -0,0 +1 @@
+/home/jingyi/dotfiles/.config/nvim/lua/plugins/leetcode.lua
\ No newline at end of file

From 9d38b4c64822dabbd0b86724ecaad9c36e0d5f4f Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Mon, 25 May 2026 14:57:49 -0700
Subject: [PATCH 12/24] feat: enhance submission details display with status
 icons

---
 lua/leetcode-ui/split/submissions.lua | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/lua/leetcode-ui/split/submissions.lua b/lua/leetcode-ui/split/submissions.lua
index 51cdcbad..e753b118 100644
--- a/lua/leetcode-ui/split/submissions.lua
+++ b/lua/leetcode-ui/split/submissions.lua
@@ -30,6 +30,14 @@ local function status_hl(status)
     return "leetcode_normal"
 end
 
+local function status_icon(status)
+    if status == "Accepted" then
+        return config.icons.status.ac, "leetcode_easy"
+    end
+
+    return config.icons.status.notac, "leetcode_hard"
+end
+
 local function trim_timestamp(timestamp)
     if not timestamp or timestamp == "" then
         return "unknown"
@@ -72,8 +80,8 @@ function Submissions:populate()
             layout:insert(title)
 
             local details = Line()
-            details:append("result=", "leetcode_list")
-            details:append(submission.submit_result or "Unknown", status_hl(submission.submit_result))
+            local icon, icon_hl = status_icon(submission.submit_result)
+            details:append(icon, icon_hl)
             details:append("  time=", "leetcode_list")
 
             local time_spent = submission.time_spent_minutes
@@ -85,6 +93,8 @@ function Submissions:populate()
 
             details:append("  test=", "leetcode_list")
             details:append(submission.is_test and "yes" or "no", submission.is_test and "leetcode_medium" or "leetcode_normal")
+            details:append("  ", "leetcode_list")
+            details:append(submission.submit_result or "Unknown", status_hl(submission.submit_result))
             layout:insert(details)
 
             if index < #self.submissions then

From 227e6ee5a2ee78d0f83d0adea1ffc13819aaec1e Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 16:48:07 -0700
Subject: [PATCH 13/24] feat: add CodeCompanion integration for enhanced
 problem context assistance

---
 README.md                                   |  25 +++
 lua/leetcode/command/init.lua               |   5 +
 lua/leetcode/config/template.lua            |   9 +
 lua/leetcode/integrations/codecompanion.lua | 181 ++++++++++++++++++++
 sample.codecompanionconfig.lua              |   1 +
 5 files changed, 221 insertions(+)
 create mode 100644 lua/leetcode/integrations/codecompanion.lua
 create mode 120000 sample.codecompanionconfig.lua

diff --git a/README.md b/README.md
index f29823f7..73839247 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ This fork adds submission tracking and session management capabilities to leetco
 - **Extended Hooks**: `timer_start`, `question_leave`, `on_test_result`, and improved upload hooks
 - **Submission Side Panel**: Optional left-bottom panel for past submissions
 - **External Integration**: Wire hooks to external APIs for persistence
+- **CodeCompanion Bridge**: `:Leet companion` can inject LeetCode context into CodeCompanion while delegating the actual LLM call to your own service
 - **Bug Fix**: Resolved `nvim_win_is_valid` fast event crash in timer display
 
 ## 🎯 New Hooks
@@ -44,8 +45,32 @@ Existing hooks also trigger on submissions:
 :Leet timer_stop           " Stop tracking (drop session without saving)
 :Leet session start        " Alias for timer_start
 :Leet session stop         " Alias for timer_stop
+:Leet companion            " Open a CodeCompanion chat seeded with the current LeetCode context
 ```
 
+## 🤖 CodeCompanion Bridge
+
+If you want `CodeCompanion` to be just the UI bridge while your own submission service owns the provider, model, and system prompt, configure a local OpenAI-compatible adapter in `CodeCompanion` and point `leetcode.nvim` at it:
+
+```lua
+require("leetcode").setup({
+    companion = {
+        adapter = "submission_service",
+        default_prompt = "Help me understand the bug in my current approach.",
+    },
+})
+```
+
+Then run `:Leet companion` on an open problem buffer. The plugin injects:
+
+- problem title / slug / difficulty
+- problem description
+- tags and hints
+- active testcase
+- current code from the editor
+
+as hidden chat context, while the visible prompt stays focused on what you want help with.
+
 ## 📡 External Integration Example
 
 Connect to a submission server to save data:
diff --git a/lua/leetcode/command/init.lua b/lua/leetcode/command/init.lua
index e0bc3eca..ec12bb85 100644
--- a/lua/leetcode/command/init.lua
+++ b/lua/leetcode/command/init.lua
@@ -450,6 +450,10 @@ function cmd.fold()
     q:editor_fold_imports(true)
 end
 
+function cmd.companion()
+    require("leetcode.integrations.codecompanion").prompt_and_open()
+end
+
 function cmd.get_active_session()
     local sessions = config.sessions.all
     return vim.tbl_filter(function(s)
@@ -659,6 +663,7 @@ cmd.commands = {
     restore = { cmd.restore },
     inject = { cmd.inject },
     fold = { cmd.fold },
+    companion = { cmd.companion },
     -- session = {
     --     change = {
     --         cmd.change_session,
diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 4a06998e..86a3fc21 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -124,6 +124,15 @@ local M = {
     ---@type lc.picker
     picker = { provider = nil },
 
+    companion = {
+        adapter = "submission_service", ---@type string
+        model = nil, ---@type string|nil
+        auto_submit = true, ---@type boolean
+        prompt_user = true, ---@type boolean
+        default_prompt = "Help me understand this problem and my current code.", ---@type string
+        window = nil, ---@type table|nil
+    },
+
     hooks = {
         ---@type fun()[]
         ["enter"] = {},
diff --git a/lua/leetcode/integrations/codecompanion.lua b/lua/leetcode/integrations/codecompanion.lua
new file mode 100644
index 00000000..370f0704
--- /dev/null
+++ b/lua/leetcode/integrations/codecompanion.lua
@@ -0,0 +1,181 @@
+local config = require("leetcode.config")
+local lc_utils = require("leetcode.utils")
+
+local M = {}
+
+local function notify(message, level)
+    vim.notify(message, level or vim.log.levels.INFO, { title = "leetcode.nvim" })
+end
+
+local function current_code(question)
+    if not (question and question.bufnr and vim.api.nvim_buf_is_valid(question.bufnr)) then
+        return question and question:snippet(true) or ""
+    end
+
+    local range = question:editor_section_range("code")
+    if range.complete then
+        return table.concat(range.lines, "\n", range.start_i, range.end_i)
+    end
+
+    return question:snippet(true) or ""
+end
+
+local function question_description(question)
+    local q = question.q or {}
+    local content = type(q.content) == "string" and q.content or ""
+    local translated = type(q.translated_content) == "string" and q.translated_content or ""
+    return lc_utils.translate(content, translated)
+end
+
+local function question_tags(question)
+    local tags = {}
+    local topic_tags = type(question.q.topic_tags) == "table" and question.q.topic_tags or {}
+    for _, tag in ipairs(topic_tags) do
+        table.insert(tags, tag.name or tag.slug or "")
+    end
+    return vim.tbl_filter(function(tag)
+        return tag ~= ""
+    end, tags)
+end
+
+local function question_hints(question)
+    local hints = type(question.q.hints) == "table" and question.q.hints or {}
+    return vim.tbl_map(function(hint)
+        return tostring(hint)
+    end, hints)
+end
+
+function M.build_context(question)
+    return {
+        title = question.q.title or "",
+        title_slug = question.q.title_slug or "",
+        difficulty = question.q.difficulty or "",
+        lang = question.lang or config.lang,
+        description = question_description(question),
+        tags = question_tags(question),
+        hints = question_hints(question),
+        code = current_code(question),
+        testcase = question.console and question.console.testcase and question.console.testcase:content() or "",
+    }
+end
+
+function M.render_context(context)
+    local parts = {
+        "# LeetCode Problem Context",
+        "",
+        ("- Title: %s"):format(context.title),
+        ("- Title Slug: %s"):format(context.title_slug),
+        ("- Difficulty: %s"):format(context.difficulty),
+        ("- Language: %s"):format(context.lang),
+    }
+
+    if not vim.tbl_isempty(context.tags) then
+        table.insert(parts, ("- Tags: %s"):format(table.concat(context.tags, ", ")))
+    end
+
+    table.insert(parts, "")
+    table.insert(parts, "## Problem Description")
+    table.insert(parts, context.description ~= "" and context.description or "(empty)")
+
+    if not vim.tbl_isempty(context.hints) then
+        table.insert(parts, "")
+        table.insert(parts, "## Hints")
+        for index, hint in ipairs(context.hints) do
+            table.insert(parts, ("%d. %s"):format(index, hint))
+        end
+    end
+
+    if context.testcase ~= "" then
+        table.insert(parts, "")
+        table.insert(parts, "## Active Testcase")
+        table.insert(parts, "```text")
+        table.insert(parts, context.testcase)
+        table.insert(parts, "```")
+    end
+
+    table.insert(parts, "")
+    table.insert(parts, "## Current Code")
+    table.insert(parts, ("```%s"):format(context.lang))
+    table.insert(parts, context.code ~= "" and context.code or "")
+    table.insert(parts, "```")
+
+    return table.concat(parts, "\n")
+end
+
+function M.open(opts)
+    opts = opts or {}
+
+    local question = lc_utils.curr_question()
+    if not question then
+        return
+    end
+
+    local ok, codecompanion = pcall(require, "codecompanion")
+    if not ok then
+        notify("CodeCompanion is not available", vim.log.levels.ERROR)
+        return
+    end
+
+    local cc = config.user.companion or {}
+    local prompt = opts.prompt or cc.default_prompt or ""
+    local params = {
+        adapter = cc.adapter,
+    }
+
+    if cc.model and cc.model ~= "" then
+        params.model = cc.model
+    end
+
+    local context = M.build_context(question)
+    return codecompanion.chat({
+        auto_submit = cc.auto_submit ~= false,
+        ignore_system_prompt = true,
+        params = params,
+        title = ("LeetCode: %s"):format(context.title ~= "" and context.title or context.title_slug),
+        user_prompt = prompt,
+        window_opts = cc.window,
+        callbacks = {
+            on_created = function(chat)
+                chat:add_context(
+                    {
+                        role = "user",
+                        content = M.render_context(context),
+                    },
+                    "leetcode",
+                    ("<leetcode:%s>"):format(context.title_slug ~= "" and context.title_slug or chat.id),
+                    {
+                        visible = false,
+                        tag = "leetcode_context",
+                    }
+                )
+            end,
+        },
+    })
+end
+
+function M.prompt_and_open()
+    local cc = config.user.companion or {}
+    local default_prompt = cc.default_prompt or ""
+
+    if cc.prompt_user == false then
+        return M.open({ prompt = default_prompt })
+    end
+
+    vim.ui.input({
+        prompt = "What do you want help with? ",
+        default = default_prompt,
+    }, function(input)
+        if input == nil then
+            return
+        end
+
+        local prompt = vim.trim(input)
+        if prompt == "" then
+            prompt = default_prompt
+        end
+
+        M.open({ prompt = prompt })
+    end)
+end
+
+return M
diff --git a/sample.codecompanionconfig.lua b/sample.codecompanionconfig.lua
new file mode 120000
index 00000000..91874b62
--- /dev/null
+++ b/sample.codecompanionconfig.lua
@@ -0,0 +1 @@
+/home/jingyi/.config/nvim/lua/plugins/codecompanion.lua
\ No newline at end of file

From e4323c8bba81c87f78dd3651151e98532305b0b8 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 17:17:57 -0700
Subject: [PATCH 14/24] feat: implement current_question and require_question
 functions for better question handling

---
 lua/leetcode/integrations/codecompanion.lua | 35 ++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/lua/leetcode/integrations/codecompanion.lua b/lua/leetcode/integrations/codecompanion.lua
index 370f0704..284fe69c 100644
--- a/lua/leetcode/integrations/codecompanion.lua
+++ b/lua/leetcode/integrations/codecompanion.lua
@@ -7,6 +7,24 @@ local function notify(message, level)
     vim.notify(message, level or vim.log.levels.INFO, { title = "leetcode.nvim" })
 end
 
+local function current_question()
+    local current_tab = vim.api.nvim_get_current_tabpage()
+    for _, entry in ipairs(lc_utils.question_tabs()) do
+        if entry.tabpage == current_tab then
+            return entry.question
+        end
+    end
+end
+
+local function require_question()
+    local question = current_question()
+    if not question then
+        notify("CodeCompanionChat requires an active leetcode question", vim.log.levels.WARN)
+        return nil
+    end
+    return question
+end
+
 local function current_code(question)
     if not (question and question.bufnr and vim.api.nvim_buf_is_valid(question.bufnr)) then
         return question and question:snippet(true) or ""
@@ -105,7 +123,7 @@ end
 function M.open(opts)
     opts = opts or {}
 
-    local question = lc_utils.curr_question()
+    local question = require_question()
     if not question then
         return
     end
@@ -153,6 +171,10 @@ function M.open(opts)
     })
 end
 
+function M.toggle_or_open()
+    return M.prompt_and_open()
+end
+
 function M.prompt_and_open()
     local cc = config.user.companion or {}
     local default_prompt = cc.default_prompt or ""
@@ -178,4 +200,15 @@ function M.prompt_and_open()
     end)
 end
 
+function M.command(opts)
+    opts = opts or {}
+    local fargs = opts.fargs or {}
+
+    if #fargs == 0 then
+        return M.prompt_and_open()
+    end
+
+    return M.open({ prompt = table.concat(fargs, " ") })
+end
+
 return M

From 69042ac94cddf5928ff38d64e69d3d765474c032 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 17:53:01 -0700
Subject: [PATCH 15/24] feat: enhance chat management with binding and
 unbinding functions

---
 lua/leetcode/integrations/codecompanion.lua | 129 ++++++++++++++++++++
 1 file changed, 129 insertions(+)

diff --git a/lua/leetcode/integrations/codecompanion.lua b/lua/leetcode/integrations/codecompanion.lua
index 284fe69c..4e5da5aa 100644
--- a/lua/leetcode/integrations/codecompanion.lua
+++ b/lua/leetcode/integrations/codecompanion.lua
@@ -2,6 +2,7 @@ local config = require("leetcode.config")
 local lc_utils = require("leetcode.utils")
 
 local M = {}
+local active_chats_by_slug = {}
 
 local function notify(message, level)
     vim.notify(message, level or vim.log.levels.INFO, { title = "leetcode.nvim" })
@@ -16,6 +17,54 @@ local function current_question()
     end
 end
 
+local function question_slug(question)
+    return question and question.q and question.q.title_slug or ""
+end
+
+local function is_chat_valid(chat)
+    return chat
+        and type(chat) == "table"
+        and chat.bufnr
+        and vim.api.nvim_buf_is_valid(chat.bufnr)
+        and vim.api.nvim_buf_is_loaded(chat.bufnr)
+end
+
+local function bind_chat(title_slug, chat)
+    if title_slug == "" or not is_chat_valid(chat) then
+        return
+    end
+    active_chats_by_slug[title_slug] = chat
+end
+
+local function unbind_chat(title_slug, chat)
+    if title_slug == "" then
+        return
+    end
+
+    if active_chats_by_slug[title_slug] == chat then
+        active_chats_by_slug[title_slug] = nil
+    end
+end
+
+local function current_chat_for_slug(title_slug)
+    local chat = active_chats_by_slug[title_slug]
+    if not is_chat_valid(chat) then
+        active_chats_by_slug[title_slug] = nil
+        return nil
+    end
+    return chat
+end
+
+local function chat_has_context_id(chat, context_id)
+    local items = chat and chat.context_items or {}
+    for _, item in ipairs(items) do
+        if item.id == context_id then
+            return true
+        end
+    end
+    return false
+end
+
 local function require_question()
     local question = current_question()
     if not question then
@@ -120,6 +169,77 @@ function M.render_context(context)
     return table.concat(parts, "\n")
 end
 
+function M.render_failure_event_context(event)
+    local parts = {
+        "# LeetCode Failure Event",
+        "",
+        ("- Title Slug: %s"):format(event.title_slug),
+        ("- Event ID: %s"):format(event.event_id),
+        "- Source: submission-service",
+        "- This failure event is already stored in the active submission-service session memory.",
+    }
+
+    if event.summary ~= "" then
+        table.insert(parts, "")
+        table.insert(parts, "## Latest Failure Summary")
+        table.insert(parts, event.summary)
+    end
+
+    if type(event.annotation_count) == "number" and event.annotation_count > 0 then
+        table.insert(parts, "")
+        table.insert(parts, ("- Annotation Count: %d"):format(event.annotation_count))
+    end
+
+    return table.concat(parts, "\n")
+end
+
+function M.render_failure_event(question, event)
+    local title_slug = question_slug(question)
+    local event_id = type(event) == "table" and event.event_id or ""
+    if title_slug == "" or type(event_id) ~= "string" or event_id == "" then
+        return false
+    end
+
+    local chat = current_chat_for_slug(title_slug)
+    if not chat then
+        return false
+    end
+
+    local context_id = ("<leetcode_failure:%s>"):format(event_id)
+    if chat_has_context_id(chat, context_id) then
+        return true
+    end
+
+    chat:add_context(
+        {
+            role = "user",
+            content = M.render_failure_event_context({
+                title_slug = title_slug,
+                event_id = event_id,
+                summary = type(event.summary) == "string" and event.summary or "",
+                annotation_count = tonumber(event.count) or 0,
+            }),
+        },
+        "leetcode",
+        context_id,
+        {
+            visible = false,
+            tag = "leetcode_failure_event",
+        }
+    )
+
+    if chat.refresh_context then
+        chat:refresh_context()
+    end
+
+    chat:add_buf_message({
+        role = "user",
+        content = ("Attached failure event `%s` to this session."):format(event_id),
+    })
+
+    return true
+end
+
 function M.open(opts)
     opts = opts or {}
 
@@ -145,6 +265,7 @@ function M.open(opts)
     end
 
     local context = M.build_context(question)
+    local title_slug = question_slug(question)
     return codecompanion.chat({
         auto_submit = cc.auto_submit ~= false,
         ignore_system_prompt = true,
@@ -154,6 +275,7 @@ function M.open(opts)
         window_opts = cc.window,
         callbacks = {
             on_created = function(chat)
+                bind_chat(title_slug, chat)
                 chat:add_context(
                     {
                         role = "user",
@@ -167,6 +289,9 @@ function M.open(opts)
                     }
                 )
             end,
+            on_closed = function(chat)
+                unbind_chat(title_slug, chat)
+            end,
         },
     })
 end
@@ -211,4 +336,8 @@ function M.command(opts)
     return M.open({ prompt = table.concat(fargs, " ") })
 end
 
+function M.clear(question)
+    unbind_chat(question_slug(question), current_chat_for_slug(question_slug(question)))
+end
+
 return M

From b2dec77ae0f9756e9c56d8872b20cc1aa00db9a3 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 18:05:40 -0700
Subject: [PATCH 16/24] Refactor code structure for improved readability and
 maintainability

---
 AGENTS.md                                     |  61 ++++++++
 ...ecompanion-session-failure-event-bridge.md | 100 ++++++++++++
 docs/d2/codecompanion-bridge.d2               | 142 ++++++++++++++++++
 docs/d2/codecompanion-bridge.svg              | 123 +++++++++++++++
 4 files changed, 426 insertions(+)
 create mode 100644 AGENTS.md
 create mode 100644 docs/adrs/001-codecompanion-session-failure-event-bridge.md
 create mode 100644 docs/d2/codecompanion-bridge.d2
 create mode 100644 docs/d2/codecompanion-bridge.svg

diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 00000000..0c562791
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,61 @@
+# AGENTS.md
+
+Agent map for `leetcode.nvim`.
+
+Read ADRs first when changing session behavior, hooks, or the CodeCompanion bridge. Use `README.md` and nearby Lua modules after that.
+
+## What This Repo Owns
+
+- LeetCode UI, commands, and question lifecycle inside Neovim
+- hook dispatch around test / submit / timer events
+- CodeCompanion bridge for LeetCode context injection
+- editor-side rendering for submission-service-backed companion events
+
+## Start Here
+
+1. [docs/adrs/001-codecompanion-session-failure-event-bridge.md](./docs/adrs/001-codecompanion-session-failure-event-bridge.md)
+2. [README.md](./README.md)
+3. [lua/leetcode/integrations/codecompanion.lua](./lua/leetcode/integrations/codecompanion.lua)
+4. [lua/leetcode/config/hooks.lua](./lua/leetcode/config/hooks.lua)
+5. [lua/leetcode/runner/init.lua](./lua/leetcode/runner/init.lua)
+
+## File Map
+
+- `lua/leetcode/integrations/codecompanion.lua`
+  CodeCompanion bridge, hidden context injection, question-bound chat tracking, failure-event rendering.
+- `lua/leetcode/config/hooks.lua`
+  Canonical hook registration and defaults.
+- `lua/leetcode/runner/init.lua`
+  Execution path for test / submit flows and hook dispatch.
+- `lua/leetcode/command/init.lua`
+  User-facing `:Leet` commands.
+- `lua/leetcode-ui/`
+  Question, result, and side-panel rendering.
+- `docs/adrs/`
+  Durable behavior decisions for this fork.
+
+## Guardrails
+
+- Keep `leetcode.nvim` as a UI/context bridge; do not move provider or model ownership into this repo.
+- Prefer stable data from submission service over reconstructing session truth inside Lua.
+- Keep hook payload shapes backward compatible unless the user explicitly asks for a contract change.
+- Prefer hidden context for companion-side lifecycle metadata over visible user-message injection.
+
+## D2 Diagram Style Preference
+
+When adding or updating D2 diagrams, prefer the user's established high-level architecture style:
+
+- Treat D2 as a system overview first, not an implementation-detail dump.
+- Group nodes by runtime boundary before drawing flows, for example `Strict local`.
+- Clearly separate entry points, runtime surfaces, external systems, and data planes.
+- Prefer a left-to-right primary reading direction with straight main flows and minimal crossing lines.
+- Optimize for ownership and data flow clarity, not source-file completeness.
+- Use a small number of stable responsibility-oriented node labels rather than many file/module names.
+- Keep edge labels short and protocol/action-oriented, such as `JSON over TCP`.
+- Preserve generous whitespace and a clean overview feel; prefer one readable system map plus optional focused sub-diagrams.
+
+## When To Update Docs
+
+- Update ADRs when the companion bridge, session binding, or hook semantics change.
+- Update `README.md` when user-facing setup or behavior changes.
+- Update this file only when the navigation order or edit guardrails change.
diff --git a/docs/adrs/001-codecompanion-session-failure-event-bridge.md b/docs/adrs/001-codecompanion-session-failure-event-bridge.md
new file mode 100644
index 00000000..eb03db4e
--- /dev/null
+++ b/docs/adrs/001-codecompanion-session-failure-event-bridge.md
@@ -0,0 +1,100 @@
+# CodeCompanion Session Failure Event Bridge
+
+日期: 2026-06-07
+
+相关背景:
+
+- [README.md](../../README.md)
+- `leetcode-qa` 中 submission service 的 session-bound companion memory 设计
+
+## 背景
+
+这个 fork 里的 `CodeCompanion` 集成不是一个独立 agent runtime。
+
+它的目标是:
+
+- `leetcode.nvim` 提供题目上下文和 UI bridge
+- 真正的 LLM provider / model / prompt / session memory 由 submission service 持有
+
+当用户在 companion chat 打开之后又触发了一次失败测试，如果 chat 里看不到这次 failure event，就会出现:
+
+- 当前 companion chat 不知道刚刚失败了什么
+- 用户只能手动再描述一遍
+- chat buffer 和 submission service 的 active session lifecycle 脱节
+
+## 决策
+
+### 1. `leetcode.nvim` 只做 bridge，不做 LLM ownership
+
+`lua/leetcode/integrations/codecompanion.lua` 的职责是:
+
+- 从当前题目页收集 LeetCode context
+- 打开 CodeCompanion chat
+- 以隐藏 context 形式注入题面、testcase、当前代码
+- 把 chat 绑定到当前 `title_slug`
+
+它不拥有:
+
+- provider 选择
+- model 选择
+- companion system prompt
+- solve session truth
+
+这些都由 submission service 决定。
+
+### 2. 当前 companion chat 按 `title_slug` 绑定
+
+bridge 需要记住“这道题当前对应哪个 CodeCompanion chat”。
+
+当前实现用 `title_slug -> chat instance` 的内存映射来做这件事。
+
+这样 submission-related hook 收到 failure event 时，才能把 event 投到正确的 chat，而不是任意最后一个 chat。
+
+### 3. failure event 由 submission service 生成，nvim 负责渲染
+
+submission service 在 `analyze_failure` 成功后返回稳定的 `event_id`。
+
+`leetcode.nvim` 不自己发明 failure id，也不自己推导“哪次 failure 才算最新”。
+
+客户端只做两件事:
+
+1. 把 `<leetcode_failure:<event_id>>` 作为隐藏 context 加到当前 chat
+2. 在 chat buffer 里追加一条可见提示，说明这次 failure event 已经挂进当前会话
+
+### 4. failure event 通过现有 analyze_failure 客户端链路自动投递
+
+当前自动投递入口放在 `leetcode-qa/lua/submission_db_saver.lua` 的 `analyze_failure()` 回调里。
+
+也就是说，只要某次 test / submit failure 最终走到了这条分析路径，并且服务端返回了 `event_id`，bridge 就会自动尝试把它注入当前 companion chat。
+
+### 5. 失败事件默认作为隐藏 context，而不是普通聊天正文
+
+因为这条信息本质上是 solve lifecycle 里的结构化上下文，不是用户输入的自由文本。
+
+把它作为隐藏 context 的好处:
+
+- 不污染用户正在看的可见聊天正文
+- 可以被 submission service 的 companion endpoint 稳定识别
+- 可以避免它被误当成普通 user question
+
+## 结果
+
+现在 `leetcode.nvim` 里的 companion 行为分成两段:
+
+1. 打开 chat 时注入 `LeetCode Problem Context`
+2. failure 发生并分析成功后，再注入 `LeetCode Failure Event`
+
+这让单个 CodeCompanion chat 能跟上同一道题在 solve lifecycle 里的最新 failure state。
+
+## 当前边界
+
+- 这个 bridge 只保证“同题目当前 chat”会收到 event
+- 它不负责跨题会话恢复
+- 它不负责 failure event 的长期持久化
+- 它不自己请求 LLM 来解释 failure，解释仍由 submission service 返回
+
+## 后续约束
+
+- 新增 companion 相关功能时，优先沿用 `title_slug` 绑定，而不是退回“last chat”这种弱绑定
+- 新增 session-aware context 时，优先走隐藏 context 注入
+- 如果 submission service 扩展了更多 session event，客户端优先复用服务端给的 stable ids / payloads，而不是本地重建语义
diff --git a/docs/d2/codecompanion-bridge.d2 b/docs/d2/codecompanion-bridge.d2
new file mode 100644
index 00000000..79f801e2
--- /dev/null
+++ b/docs/d2/codecompanion-bridge.d2
@@ -0,0 +1,142 @@
+direction: right
+
+nvim: {
+  label: "nvim\nentry point"
+  shape: cylinder
+  style: {
+    fill: "#fecaca"
+    stroke: "#2563eb"
+    stroke-width: 2
+  }
+}
+
+companion_client: {
+  label: "CodeCompanion\nexternal client"
+  shape: circle
+  style: {
+    fill: "#f5b4fc"
+    stroke: "#2563eb"
+    stroke-width: 2
+  }
+}
+
+local_runtime: {
+  label: "Strict local"
+  direction: down
+  style: {
+    fill: "#fff7ed"
+    stroke: "#fdba74"
+    stroke-width: 2
+  }
+
+  leetcode_nvim: {
+    label: "leetcode.nvim"
+    style: {
+      fill: "#fdba74"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+
+  question_runtime: {
+    label: "question runtime"
+    style: {
+      fill: "#fde68a"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+
+  hook_router: {
+    label: "hook router"
+    style: {
+      fill: "#fde68a"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+
+  codecompanion_bridge: {
+    label: "codecompanion bridge"
+    style: {
+      fill: "#fde68a"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+
+  submission_db_saver: {
+    label: "submission_db_saver"
+    style: {
+      fill: "#fde68a"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+}
+
+service_runtime: {
+  label: "Strict local\nsubmission runtime"
+  direction: down
+  style: {
+    fill: "#eef2ff"
+    stroke: "#93c5fd"
+    stroke-width: 2
+  }
+
+  submission_service: {
+    label: "leetcode-submission-service"
+    style: {
+      fill: "#bfdbfe"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+
+  companion_http: {
+    label: "companion HTTP"
+    style: {
+      fill: "#bfdbfe"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+
+  failure_analysis: {
+    label: "failure analysis"
+    style: {
+      fill: "#bfdbfe"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+
+  session_scope: {
+    label: "active session scope\nin-memory"
+    style: {
+      fill: "#dbeafe"
+      stroke: "#2563eb"
+      stroke-width: 2
+    }
+  }
+}
+
+nvim -> local_runtime.leetcode_nvim: "editor runtime"
+companion_client -> service_runtime.companion_http: "OpenAI-compatible chat"
+
+local_runtime.leetcode_nvim -> local_runtime.question_runtime: "question lifecycle"
+local_runtime.leetcode_nvim -> local_runtime.codecompanion_bridge: ":Leet companion"
+local_runtime.question_runtime -> local_runtime.hook_router: "test / submit hooks"
+local_runtime.hook_router -> local_runtime.submission_db_saver: "failure callbacks"
+local_runtime.codecompanion_bridge -> companion_client: "hidden LeetCode context"
+
+local_runtime.submission_db_saver -> service_runtime.submission_service: "JSON over TCP"
+service_runtime.submission_service -> service_runtime.failure_analysis: "analyze_failure"
+service_runtime.submission_service -> service_runtime.companion_http: "local companion endpoint"
+
+service_runtime.failure_analysis -> service_runtime.session_scope: "write latest failure\nstatic analysis\nevent_id"
+service_runtime.companion_http -> service_runtime.session_scope: "read / write companion memory"
+
+service_runtime.submission_service -> local_runtime.submission_db_saver: "failure event payload"
+local_runtime.submission_db_saver -> local_runtime.codecompanion_bridge: "render failure event"
+local_runtime.codecompanion_bridge -> companion_client: "attach hidden failure context"
diff --git a/docs/d2/codecompanion-bridge.svg b/docs/d2/codecompanion-bridge.svg
new file mode 100644
index 00000000..3eccf941
--- /dev/null
+++ b/docs/d2/codecompanion-bridge.svg
@@ -0,0 +1,123 @@
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+.d2-3752754054 .text {
+	font-family: "d2-3752754054-font-regular";
+}
+@font-face {
+	font-family: d2-3752754054-font-regular;
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+	font-family: "d2-3752754054-font-italic";
+}
+@font-face {
+	font-family: d2-3752754054-font-italic;
+	src: 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+  shape-rendering: geometricPrecision;
+  stroke-linejoin: round;
+}
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+  stroke-linecap: round;
+  stroke-linejoin: round;
+}
+.blend {
+  mix-blend-mode: multiply;
+  opacity: 0.5;
+}
+
+		.d2-3752754054 .fill-N1{fill:#0A0F25;}
+		.d2-3752754054 .fill-N2{fill:#676C7E;}
+		.d2-3752754054 .fill-N3{fill:#9499AB;}
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From 80808d24d28b96cea4e7b82a7097238b52cc545f Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 20:41:13 -0700
Subject: [PATCH 17/24] feat: enhance submissions and memory handling with new
 state management and UI updates

---
 lua/leetcode-ui/question.lua          |   1 +
 lua/leetcode-ui/split/submissions.lua | 238 ++++++++++++++++++++++++--
 2 files changed, 220 insertions(+), 19 deletions(-)

diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index 505e6014..b62c105b 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -17,6 +17,7 @@ local log = require("leetcode.logger")
 ---@field q lc.question_res
 ---@field description lc.ui.Description
 ---@field submissions? lc.ui.Submissions
+---@field mem0_recall_summary? table
 ---@field bufnr integer
 ---@field console lc.ui.Console
 ---@field lang string
diff --git a/lua/leetcode-ui/split/submissions.lua b/lua/leetcode-ui/split/submissions.lua
index e753b118..a3202b76 100644
--- a/lua/leetcode-ui/split/submissions.lua
+++ b/lua/leetcode-ui/split/submissions.lua
@@ -4,12 +4,17 @@ local Group = require("leetcode-ui.group")
 local Line = require("leetcode-ui.line")
 local Padding = require("leetcode-ui.lines.padding")
 local Split = require("leetcode-ui.split")
+local ui_utils = require("leetcode-ui.utils")
 
 ---@class lc.ui.Submissions : lc-ui.Split
 ---@field question lc.ui.Question
----@field state "loading"|"ready"|"empty"|"error"
+---@field active_tab "submissions"|"memory"
+---@field submissions_state "loading"|"ready"|"empty"|"error"
+---@field memory_state "loading"|"ready"|"empty"|"error"
 ---@field submissions table[]
 ---@field message? string
+---@field memory_summary? table
+---@field memory_message? string
 local Submissions = Split:extend("LeetSubmissions")
 
 local function debug_log(msg)
@@ -46,7 +51,94 @@ local function trim_timestamp(timestamp)
     return timestamp:gsub(" %u+$", "")
 end
 
+local function panel_content_width(self)
+    local win_width = ui_utils.win_width(self)
+    local usable_width = math.max(20, win_width - 6)
+    return math.min(usable_width, 88)
+end
+
+local function wrap_text(text, max_width)
+    local chunks = {}
+    local current = ""
+    local current_width = 0
+    local source = tostring(text or ""):gsub("\r\n", "\n")
+
+    for raw_line in source:gmatch("([^\n]*)\n?") do
+        if raw_line == "" then
+            if current ~= "" then
+                table.insert(chunks, current)
+                current = ""
+                current_width = 0
+            end
+            if #chunks == 0 or chunks[#chunks] ~= "" then
+                table.insert(chunks, "")
+            end
+        else
+            local index = 0
+            while true do
+                local char = vim.fn.strcharpart(raw_line, index, 1)
+                if char == nil or char == "" then
+                    break
+                end
+
+                local char_width = vim.api.nvim_strwidth(char)
+                if current_width > 0 and current_width + char_width > max_width then
+                    table.insert(chunks, current)
+                    current = char
+                    current_width = char_width
+                else
+                    current = current .. char
+                    current_width = current_width + char_width
+                end
+
+                index = index + 1
+            end
+
+            if current ~= "" then
+                table.insert(chunks, current)
+                current = ""
+                current_width = 0
+            end
+        end
+    end
+
+    while #chunks > 0 and chunks[#chunks] == "" do
+        table.remove(chunks)
+    end
+
+    return vim.tbl_isempty(chunks) and { "" } or chunks
+end
+
+local function insert_wrapped_value(layout, label, content, max_width, value_hl)
+    local label_width = vim.api.nvim_strwidth(label)
+    local wrapped = wrap_text(content, math.max(10, max_width - label_width))
+
+    for index, segment in ipairs(wrapped) do
+        local line = Line()
+        if index == 1 then
+            line:append(label, "leetcode_list")
+        else
+            line:append((" "):rep(label_width), "leetcode_list")
+        end
+        line:append(segment, value_hl or "leetcode_normal")
+        layout:insert(line)
+    end
+end
+
+local function memory_status_hl(status)
+    if status == "Accepted" then
+        return "leetcode_easy"
+    end
+
+    if status == "Wrong Answer" or status == "Runtime Error" or status == "Time Limit Exceeded" then
+        return "leetcode_hard"
+    end
+
+    return "leetcode_alt"
+end
+
 function Submissions:populate()
+    local max_width = panel_content_width(self)
     local layout = Group({}, {
         padding = {
             left = 1,
@@ -55,24 +147,26 @@ function Submissions:populate()
         },
     })
 
-    local header = Line()
-    header:append("Past Submissions", "leetcode_medium")
-    layout:insert(header)
+    local tabs = Line()
+    tabs:append("[1] 历史提交", self.active_tab == "submissions" and "leetcode_medium" or "leetcode_alt")
+    tabs:append("  |  ", "leetcode_alt")
+    tabs:append("[2] 历史记忆", self.active_tab == "memory" and "leetcode_medium" or "leetcode_alt")
+    layout:insert(tabs)
     layout:insert(Padding(1))
 
-    if self.state == "loading" then
+    if self.active_tab == "submissions" and self.submissions_state == "loading" then
         local line = Line()
-        line:append("Loading submissions...", "leetcode_alt")
+        line:append("正在加载历史提交...", "leetcode_alt")
         layout:insert(line)
-    elseif self.state == "error" then
+    elseif self.active_tab == "submissions" and self.submissions_state == "error" then
         local line = Line()
-        line:append(self.message or "Submission service unavailable", "leetcode_hard")
+        line:append(self.message or "提交服务暂不可用", "leetcode_hard")
         layout:insert(line)
-    elseif self.state == "empty" then
+    elseif self.active_tab == "submissions" and self.submissions_state == "empty" then
         local line = Line()
-        line:append("No past submissions yet", "leetcode_alt")
+        line:append("还没有历史提交", "leetcode_alt")
         layout:insert(line)
-    else
+    elseif self.active_tab == "submissions" then
         for index, submission in ipairs(self.submissions) do
             local title = Line()
             title:append(("%d. "):format(index), "leetcode_list")
@@ -82,17 +176,17 @@ function Submissions:populate()
             local details = Line()
             local icon, icon_hl = status_icon(submission.submit_result)
             details:append(icon, icon_hl)
-            details:append("  time=", "leetcode_list")
+            details:append("  用时=", "leetcode_list")
 
             local time_spent = submission.time_spent_minutes
             if time_spent == nil or time_spent == vim.NIL then
-                details:append("n/a", "leetcode_alt")
+                details:append("未知", "leetcode_alt")
             else
                 details:append(("%sm"):format(time_spent), "leetcode_normal")
             end
 
-            details:append("  test=", "leetcode_list")
-            details:append(submission.is_test and "yes" or "no", submission.is_test and "leetcode_medium" or "leetcode_normal")
+            details:append("  测试=", "leetcode_list")
+            details:append(submission.is_test and "是" or "否", submission.is_test and "leetcode_medium" or "leetcode_normal")
             details:append("  ", "leetcode_list")
             details:append(submission.submit_result or "Unknown", status_hl(submission.submit_result))
             layout:insert(details)
@@ -101,6 +195,50 @@ function Submissions:populate()
                 layout:insert(Padding(1))
             end
         end
+    elseif self.memory_state == "loading" then
+        local line = Line()
+        line:append("正在加载历史记忆...", "leetcode_alt")
+        layout:insert(line)
+    elseif self.memory_state == "error" then
+        local line = Line()
+        line:append(self.memory_message or "历史记忆暂不可用", "leetcode_hard")
+        layout:insert(line)
+    elseif self.memory_state == "empty" then
+        local line = Line()
+        line:append("这道题还没有可回忆的历史记录", "leetcode_alt")
+        layout:insert(line)
+    else
+        local summary = self.memory_summary or {}
+        local count_line = Line()
+        count_line:append("历史记录数：", "leetcode_list")
+        count_line:append(tostring(summary.record_count or 0), "leetcode_normal")
+        layout:insert(count_line)
+
+        local sessions = summary.sessions or {}
+        for index, session in ipairs(sessions) do
+            layout:insert(Padding(1))
+
+            local header = Line()
+            header:append(("%d. "):format(index), "leetcode_list")
+            header:append(session.endReason or "unknown", "leetcode_medium")
+            if session.latestFailureStatus and session.latestFailureStatus ~= vim.NIL then
+                header:append("  ", "leetcode_alt")
+                header:append(session.latestFailureStatus, memory_status_hl(session.latestFailureStatus))
+            end
+            layout:insert(header)
+
+            if session.failureSummary and session.failureSummary ~= vim.NIL and session.failureSummary ~= "" then
+                insert_wrapped_value(layout, "failure: ", session.failureSummary, max_width)
+            end
+
+            if type(session.stuckPoints) == "table" and #session.stuckPoints > 0 then
+                insert_wrapped_value(layout, "stuck: ", table.concat(session.stuckPoints, " | "), max_width)
+            end
+
+            if type(session.thoughtProcess) == "table" and #session.thoughtProcess > 0 then
+                insert_wrapped_value(layout, "thought: ", table.concat(session.thoughtProcess, " | "), max_width)
+            end
+        end
     end
 
     self.renderer:replace({ layout })
@@ -113,7 +251,7 @@ end
 
 function Submissions:set_loading()
     debug_log("set_loading")
-    self.state = "loading"
+    self.submissions_state = "loading"
     self.message = nil
     self.submissions = {}
     self:draw()
@@ -122,7 +260,7 @@ end
 ---@param msg string
 function Submissions:set_error(msg)
     debug_log("set_error " .. tostring(msg))
-    self.state = "error"
+    self.submissions_state = "error"
     self.message = msg
     self.submissions = {}
     self:draw()
@@ -133,17 +271,53 @@ function Submissions:update_submissions(submissions)
     debug_log("update_submissions count=" .. tostring(submissions and #submissions or 0))
     self.submissions = submissions or {}
     self.message = nil
-    self.state = vim.tbl_isempty(self.submissions) and "empty" or "ready"
+    self.submissions_state = vim.tbl_isempty(self.submissions) and "empty" or "ready"
+    self:draw()
+end
+
+function Submissions:set_memory_loading()
+    self.memory_state = "loading"
+    self.memory_message = nil
+    self.memory_summary = nil
+    self:draw()
+end
+
+---@param msg string
+function Submissions:set_memory_error(msg)
+    self.memory_state = "error"
+    self.memory_message = msg
+    self.memory_summary = nil
+    self:draw()
+end
+
+---@param summary table
+function Submissions:update_memory(summary)
+    self.memory_summary = summary or {}
+    self.memory_message = nil
+    self.memory_state = summary and summary.has_history and "ready" or "empty"
+    self.question.mem0_recall_summary = self.memory_summary
+    self:draw()
+end
+
+---@param tab "submissions"|"memory"
+function Submissions:switch_tab(tab)
+    if self.active_tab == tab then
+        return
+    end
+
+    self.active_tab = tab
     self:draw()
 end
 
 function Submissions:fetch()
     debug_log("fetch begin for " .. self.question.q.title_slug)
     self:set_loading()
+    self:set_memory_loading()
 
     local ok, saver = pcall(require, "submission_db_saver")
     if not ok then
         self:set_error("submission_db_saver.lua not found")
+        self:set_memory_error("submission_db_saver.lua not found")
         return
     end
 
@@ -165,11 +339,34 @@ function Submissions:fetch()
             self:update_submissions(submissions)
         end)
     end, config.user.description.submissions.limit)
+
+    saver.get_mem0_recall_summary(self.question, function(response)
+        vim.schedule(function()
+            if not self._.mounted then
+                debug_log("mem0 callback ignored because panel unmounted")
+                return
+            end
+
+            debug_log("mem0 callback response=" .. vim.inspect(response))
+            if response.error then
+                self:set_memory_error(response.error)
+                return
+            end
+
+            self:update_memory(response)
+        end)
+    end)
 end
 
 function Submissions:mount()
     Submissions.super.mount(self)
     self:fetch()
+    self:map("n", { "1", "<leader>1" }, function()
+        self:switch_tab("submissions")
+    end)
+    self:map("n", { "2", "<leader>2" }, function()
+        self:switch_tab("memory")
+    end)
 
     local ui_utils = require("leetcode-ui.utils")
     ui_utils.buf_set_opts(self.bufnr, {
@@ -213,8 +410,11 @@ function Submissions:init(parent)
     })
 
     self.question = parent
-    self.state = "loading"
+    self.active_tab = "submissions"
+    self.submissions_state = "loading"
+    self.memory_state = "loading"
     self.submissions = parent.past_submissions or {}
+    self.memory_summary = parent.mem0_recall_summary
 end
 
 ---@type fun(parent: lc.ui.Question): lc.ui.Submissions

From f281bacbf4c49719503a195b5bf9d387f05abf14 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 21:03:54 -0700
Subject: [PATCH 18/24] feat: add memory refresh functionality and manage
 active panels

---
 lua/leetcode-ui/split/submissions.lua | 45 +++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/lua/leetcode-ui/split/submissions.lua b/lua/leetcode-ui/split/submissions.lua
index a3202b76..e9c76d1c 100644
--- a/lua/leetcode-ui/split/submissions.lua
+++ b/lua/leetcode-ui/split/submissions.lua
@@ -5,6 +5,7 @@ local Line = require("leetcode-ui.line")
 local Padding = require("leetcode-ui.lines.padding")
 local Split = require("leetcode-ui.split")
 local ui_utils = require("leetcode-ui.utils")
+local active_panels_by_slug = {}
 
 ---@class lc.ui.Submissions : lc-ui.Split
 ---@field question lc.ui.Question
@@ -299,6 +300,32 @@ function Submissions:update_memory(summary)
     self:draw()
 end
 
+function Submissions:refresh_memory()
+    local ok, saver = pcall(require, "submission_db_saver")
+    if not ok then
+        self:set_memory_error("submission_db_saver.lua not found")
+        return
+    end
+
+    self:set_memory_loading()
+    saver.get_mem0_recall_summary(self.question, function(response)
+        vim.schedule(function()
+            if not self._.mounted then
+                debug_log("refresh_memory callback ignored because panel unmounted")
+                return
+            end
+
+            debug_log("refresh_memory response=" .. vim.inspect(response))
+            if response.error then
+                self:set_memory_error(response.error)
+                return
+            end
+
+            self:update_memory(response)
+        end)
+    end)
+end
+
 ---@param tab "submissions"|"memory"
 function Submissions:switch_tab(tab)
     if self.active_tab == tab then
@@ -360,6 +387,7 @@ end
 
 function Submissions:mount()
     Submissions.super.mount(self)
+    active_panels_by_slug[self.question.q.title_slug] = self
     self:fetch()
     self:map("n", { "1", "<leader>1" }, function()
         self:switch_tab("submissions")
@@ -396,6 +424,13 @@ function Submissions:mount()
     return self
 end
 
+function Submissions:unmount()
+    if active_panels_by_slug[self.question.q.title_slug] == self then
+        active_panels_by_slug[self.question.q.title_slug] = nil
+    end
+    return Submissions.super.unmount(self)
+end
+
 ---@param parent lc.ui.Question
 function Submissions:init(parent)
     Submissions.super.init(self, {
@@ -420,4 +455,14 @@ end
 ---@type fun(parent: lc.ui.Question): lc.ui.Submissions
 local LeetSubmissions = Submissions
 
+function LeetSubmissions.refresh_memory_for_slug(title_slug)
+    local panel = active_panels_by_slug[title_slug]
+    if not panel or not panel._.mounted then
+        return false
+    end
+
+    panel:refresh_memory()
+    return true
+end
+
 return LeetSubmissions

From 54cdeff87cbe17feef92f39403654e6345f61265 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 22:51:21 -0700
Subject: [PATCH 19/24] feat: add compact_string_list function and enhance
 session_failure_summaries for improved error handling

---
 lua/leetcode-ui/split/submissions.lua | 44 +++++++++++++++++++++++++--
 1 file changed, 42 insertions(+), 2 deletions(-)

diff --git a/lua/leetcode-ui/split/submissions.lua b/lua/leetcode-ui/split/submissions.lua
index e9c76d1c..b61d581f 100644
--- a/lua/leetcode-ui/split/submissions.lua
+++ b/lua/leetcode-ui/split/submissions.lua
@@ -126,6 +126,41 @@ local function insert_wrapped_value(layout, label, content, max_width, value_hl)
     end
 end
 
+local function compact_string_list(values, limit)
+    if type(values) ~= "table" then
+        return {}
+    end
+
+    local result = {}
+    local seen = {}
+
+    for _, value in ipairs(values) do
+        if value and value ~= vim.NIL and value ~= "" then
+            local text = tostring(value)
+            if not seen[text] then
+                table.insert(result, text)
+                seen[text] = true
+            end
+        end
+
+        if limit and #result >= limit then
+            break
+        end
+    end
+
+    return result
+end
+
+local function session_failure_summaries(session)
+    local summaries = compact_string_list(session.failureSummaries, 5)
+
+    if #summaries == 0 and session.failureSummary and session.failureSummary ~= vim.NIL and session.failureSummary ~= "" then
+        table.insert(summaries, tostring(session.failureSummary))
+    end
+
+    return summaries
+end
+
 local function memory_status_hl(status)
     if status == "Accepted" then
         return "leetcode_easy"
@@ -228,8 +263,13 @@ function Submissions:populate()
             end
             layout:insert(header)
 
-            if session.failureSummary and session.failureSummary ~= vim.NIL and session.failureSummary ~= "" then
-                insert_wrapped_value(layout, "failure: ", session.failureSummary, max_width)
+            if session.distinctMistakeCount and session.distinctMistakeCount ~= vim.NIL then
+                insert_wrapped_value(layout, "mistakes: ", tostring(session.distinctMistakeCount), max_width)
+            end
+
+            local failure_summaries = session_failure_summaries(session)
+            if #failure_summaries > 0 then
+                insert_wrapped_value(layout, "failure: ", table.concat(failure_summaries, " | "), max_width)
             end
 
             if type(session.stuckPoints) == "table" and #session.stuckPoints > 0 then

From 7e89b6c0c5b5f75d2697e969dd7e29a8e0a09cd6 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 23:11:08 -0700
Subject: [PATCH 20/24] feat: enhance submissions display with similar matches
 and update memory state logic

---
 lua/leetcode-ui/split/submissions.lua | 51 ++++++++++++++++++++++++++-
 1 file changed, 50 insertions(+), 1 deletion(-)

diff --git a/lua/leetcode-ui/split/submissions.lua b/lua/leetcode-ui/split/submissions.lua
index b61d581f..7297e40a 100644
--- a/lua/leetcode-ui/split/submissions.lua
+++ b/lua/leetcode-ui/split/submissions.lua
@@ -280,6 +280,50 @@ function Submissions:populate()
                 insert_wrapped_value(layout, "thought: ", table.concat(session.thoughtProcess, " | "), max_width)
             end
         end
+
+        local similar_matches = summary.similar_matches or {}
+        if #similar_matches > 0 then
+            layout:insert(Padding(1))
+
+            local similar_title = Line()
+            similar_title:append("类似题：", "leetcode_list")
+            similar_title:append(tostring(summary.similar_match_count or #similar_matches), "leetcode_normal")
+            layout:insert(similar_title)
+
+            for index, match in ipairs(similar_matches) do
+                layout:insert(Padding(1))
+
+                local header = Line()
+                header:append(("%d. "):format(index), "leetcode_list")
+                header:append(match.titleSlug or "unknown", "leetcode_medium")
+                if match.difficulty and match.difficulty ~= vim.NIL then
+                    header:append("  ", "leetcode_alt")
+                    header:append(match.difficulty, "leetcode_alt")
+                end
+                if match.score and match.score ~= vim.NIL then
+                    header:append("  score=", "leetcode_list")
+                    header:append(tostring(match.score), "leetcode_normal")
+                end
+                layout:insert(header)
+
+                if match.profile and match.profile.problemSummary and match.profile.problemSummary ~= "" then
+                    insert_wrapped_value(layout, "why: ", match.profile.problemSummary, max_width)
+                end
+
+                local failure_summaries = compact_string_list(match.failureSummaries, 5)
+                if #failure_summaries > 0 then
+                    insert_wrapped_value(layout, "failure: ", table.concat(failure_summaries, " | "), max_width)
+                end
+
+                if type(match.stuckPoints) == "table" and #match.stuckPoints > 0 then
+                    insert_wrapped_value(layout, "stuck: ", table.concat(match.stuckPoints, " | "), max_width)
+                end
+
+                if type(match.thoughtProcess) == "table" and #match.thoughtProcess > 0 then
+                    insert_wrapped_value(layout, "thought: ", table.concat(match.thoughtProcess, " | "), max_width)
+                end
+            end
+        end
     end
 
     self.renderer:replace({ layout })
@@ -335,7 +379,12 @@ end
 function Submissions:update_memory(summary)
     self.memory_summary = summary or {}
     self.memory_message = nil
-    self.memory_state = summary and summary.has_history and "ready" or "empty"
+    local has_memory = summary and (
+        summary.has_history
+        or ((summary.similar_match_count or 0) > 0)
+        or (type(summary.similar_matches) == "table" and #summary.similar_matches > 0)
+    )
+    self.memory_state = has_memory and "ready" or "empty"
     self.question.mem0_recall_summary = self.memory_summary
     self:draw()
 end

From 5f7fd782c66ce574a634930df3e6d7d2ef28bf5b Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Sun, 7 Jun 2026 23:15:10 -0700
Subject: [PATCH 21/24] feat: add support for similar questions in submissions
 panel with updated state management

---
 lua/leetcode-ui/split/submissions.lua | 111 ++++++++++++++++----------
 1 file changed, 67 insertions(+), 44 deletions(-)

diff --git a/lua/leetcode-ui/split/submissions.lua b/lua/leetcode-ui/split/submissions.lua
index 7297e40a..952dd806 100644
--- a/lua/leetcode-ui/split/submissions.lua
+++ b/lua/leetcode-ui/split/submissions.lua
@@ -9,13 +9,15 @@ local active_panels_by_slug = {}
 
 ---@class lc.ui.Submissions : lc-ui.Split
 ---@field question lc.ui.Question
----@field active_tab "submissions"|"memory"
+---@field active_tab "submissions"|"memory"|"similar"
 ---@field submissions_state "loading"|"ready"|"empty"|"error"
 ---@field memory_state "loading"|"ready"|"empty"|"error"
+---@field similar_state "loading"|"ready"|"empty"|"error"
 ---@field submissions table[]
 ---@field message? string
 ---@field memory_summary? table
 ---@field memory_message? string
+---@field similar_message? string
 local Submissions = Split:extend("LeetSubmissions")
 
 local function debug_log(msg)
@@ -187,6 +189,8 @@ function Submissions:populate()
     tabs:append("[1] 历史提交", self.active_tab == "submissions" and "leetcode_medium" or "leetcode_alt")
     tabs:append("  |  ", "leetcode_alt")
     tabs:append("[2] 历史记忆", self.active_tab == "memory" and "leetcode_medium" or "leetcode_alt")
+    tabs:append("  |  ", "leetcode_alt")
+    tabs:append("[3] 类似题", self.active_tab == "similar" and "leetcode_medium" or "leetcode_alt")
     layout:insert(tabs)
     layout:insert(Padding(1))
 
@@ -231,19 +235,19 @@ function Submissions:populate()
                 layout:insert(Padding(1))
             end
         end
-    elseif self.memory_state == "loading" then
+    elseif self.active_tab == "memory" and self.memory_state == "loading" then
         local line = Line()
         line:append("正在加载历史记忆...", "leetcode_alt")
         layout:insert(line)
-    elseif self.memory_state == "error" then
+    elseif self.active_tab == "memory" and self.memory_state == "error" then
         local line = Line()
         line:append(self.memory_message or "历史记忆暂不可用", "leetcode_hard")
         layout:insert(line)
-    elseif self.memory_state == "empty" then
+    elseif self.active_tab == "memory" and self.memory_state == "empty" then
         local line = Line()
         line:append("这道题还没有可回忆的历史记录", "leetcode_alt")
         layout:insert(line)
-    else
+    elseif self.active_tab == "memory" then
         local summary = self.memory_summary or {}
         local count_line = Line()
         count_line:append("历史记录数：", "leetcode_list")
@@ -280,48 +284,57 @@ function Submissions:populate()
                 insert_wrapped_value(layout, "thought: ", table.concat(session.thoughtProcess, " | "), max_width)
             end
         end
-
+    elseif self.similar_state == "loading" then
+        local line = Line()
+        line:append("正在加载类似题...", "leetcode_alt")
+        layout:insert(line)
+    elseif self.similar_state == "error" then
+        local line = Line()
+        line:append(self.similar_message or "类似题暂不可用", "leetcode_hard")
+        layout:insert(line)
+    elseif self.similar_state == "empty" then
+        local line = Line()
+        line:append("这道题还没有可回忆的类似题", "leetcode_alt")
+        layout:insert(line)
+    else
+        local summary = self.memory_summary or {}
         local similar_matches = summary.similar_matches or {}
-        if #similar_matches > 0 then
-            layout:insert(Padding(1))
-
-            local similar_title = Line()
-            similar_title:append("类似题：", "leetcode_list")
-            similar_title:append(tostring(summary.similar_match_count or #similar_matches), "leetcode_normal")
-            layout:insert(similar_title)
+        local similar_title = Line()
+        similar_title:append("类似题：", "leetcode_list")
+        similar_title:append(tostring(summary.similar_match_count or #similar_matches), "leetcode_normal")
+        layout:insert(similar_title)
 
-            for index, match in ipairs(similar_matches) do
-                layout:insert(Padding(1))
+        for index, match in ipairs(similar_matches) do
+            layout:insert(Padding(1))
 
-                local header = Line()
-                header:append(("%d. "):format(index), "leetcode_list")
-                header:append(match.titleSlug or "unknown", "leetcode_medium")
-                if match.difficulty and match.difficulty ~= vim.NIL then
-                    header:append("  ", "leetcode_alt")
-                    header:append(match.difficulty, "leetcode_alt")
-                end
-                if match.score and match.score ~= vim.NIL then
-                    header:append("  score=", "leetcode_list")
-                    header:append(tostring(match.score), "leetcode_normal")
-                end
-                layout:insert(header)
+            local header = Line()
+            header:append(("%d. "):format(index), "leetcode_list")
+            header:append(match.titleSlug or "unknown", "leetcode_medium")
+            if match.difficulty and match.difficulty ~= vim.NIL then
+                header:append("  ", "leetcode_alt")
+                header:append(match.difficulty, "leetcode_alt")
+            end
+            if match.score and match.score ~= vim.NIL then
+                header:append("  score=", "leetcode_list")
+                header:append(tostring(match.score), "leetcode_normal")
+            end
+            layout:insert(header)
 
-                if match.profile and match.profile.problemSummary and match.profile.problemSummary ~= "" then
-                    insert_wrapped_value(layout, "why: ", match.profile.problemSummary, max_width)
-                end
+            if match.profile and match.profile.problemSummary and match.profile.problemSummary ~= "" then
+                insert_wrapped_value(layout, "why: ", match.profile.problemSummary, max_width)
+            end
 
-                local failure_summaries = compact_string_list(match.failureSummaries, 5)
-                if #failure_summaries > 0 then
-                    insert_wrapped_value(layout, "failure: ", table.concat(failure_summaries, " | "), max_width)
-                end
+            local failure_summaries = compact_string_list(match.failureSummaries, 5)
+            if #failure_summaries > 0 then
+                insert_wrapped_value(layout, "failure: ", table.concat(failure_summaries, " | "), max_width)
+            end
 
-                if type(match.stuckPoints) == "table" and #match.stuckPoints > 0 then
-                    insert_wrapped_value(layout, "stuck: ", table.concat(match.stuckPoints, " | "), max_width)
-                end
+            if type(match.stuckPoints) == "table" and #match.stuckPoints > 0 then
+                insert_wrapped_value(layout, "stuck: ", table.concat(match.stuckPoints, " | "), max_width)
+            end
 
-                if type(match.thoughtProcess) == "table" and #match.thoughtProcess > 0 then
-                    insert_wrapped_value(layout, "thought: ", table.concat(match.thoughtProcess, " | "), max_width)
-                end
+            if type(match.thoughtProcess) == "table" and #match.thoughtProcess > 0 then
+                insert_wrapped_value(layout, "thought: ", table.concat(match.thoughtProcess, " | "), max_width)
             end
         end
     end
@@ -362,7 +375,9 @@ end
 
 function Submissions:set_memory_loading()
     self.memory_state = "loading"
+    self.similar_state = "loading"
     self.memory_message = nil
+    self.similar_message = nil
     self.memory_summary = nil
     self:draw()
 end
@@ -370,7 +385,9 @@ end
 ---@param msg string
 function Submissions:set_memory_error(msg)
     self.memory_state = "error"
+    self.similar_state = "error"
     self.memory_message = msg
+    self.similar_message = msg
     self.memory_summary = nil
     self:draw()
 end
@@ -379,12 +396,14 @@ end
 function Submissions:update_memory(summary)
     self.memory_summary = summary or {}
     self.memory_message = nil
-    local has_memory = summary and (
-        summary.has_history
-        or ((summary.similar_match_count or 0) > 0)
+    self.similar_message = nil
+    local has_memory = summary and summary.has_history
+    local has_similar = summary and (
+        ((summary.similar_match_count or 0) > 0)
         or (type(summary.similar_matches) == "table" and #summary.similar_matches > 0)
     )
     self.memory_state = has_memory and "ready" or "empty"
+    self.similar_state = has_similar and "ready" or "empty"
     self.question.mem0_recall_summary = self.memory_summary
     self:draw()
 end
@@ -415,7 +434,7 @@ function Submissions:refresh_memory()
     end)
 end
 
----@param tab "submissions"|"memory"
+---@param tab "submissions"|"memory"|"similar"
 function Submissions:switch_tab(tab)
     if self.active_tab == tab then
         return
@@ -484,6 +503,9 @@ function Submissions:mount()
     self:map("n", { "2", "<leader>2" }, function()
         self:switch_tab("memory")
     end)
+    self:map("n", { "3", "<leader>3" }, function()
+        self:switch_tab("similar")
+    end)
 
     local ui_utils = require("leetcode-ui.utils")
     ui_utils.buf_set_opts(self.bufnr, {
@@ -537,6 +559,7 @@ function Submissions:init(parent)
     self.active_tab = "submissions"
     self.submissions_state = "loading"
     self.memory_state = "loading"
+    self.similar_state = "loading"
     self.submissions = parent.past_submissions or {}
     self.memory_summary = parent.mem0_recall_summary
 end

From 185a99c3f03e6bf550da8d36c49d789a8eaa353b Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Wed, 10 Jun 2026 00:54:21 -0700
Subject: [PATCH 22/24] feat: add auto_fence_code option to enhance code block
 rendering in chat responses

---
 README.md                                   |   3 +
 lua/leetcode/config/template.lua            |   1 +
 lua/leetcode/integrations/codecompanion.lua | 165 +++++++++++++++++++-
 3 files changed, 168 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 73839247..453fd70f 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,7 @@ require("leetcode").setup({
     companion = {
         adapter = "submission_service",
         default_prompt = "Help me understand the bug in my current approach.",
+        auto_fence_code = true,
     },
 })
 ```
@@ -71,6 +72,8 @@ Then run `:Leet companion` on an open problem buffer. The plugin injects:
 
 as hidden chat context, while the visible prompt stays focused on what you want help with.
 
+When `auto_fence_code` is enabled, `leetcode.nvim` will also wrap obviously code-like assistant replies in a fenced code block before re-rendering the CodeCompanion buffer. This gives Treesitter a better chance to apply syntax highlighting even when the submission service forgets to fence the snippet itself.
+
 ## 📡 External Integration Example
 
 Connect to a submission server to save data:
diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 86a3fc21..6b46f7d5 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -128,6 +128,7 @@ local M = {
         adapter = "submission_service", ---@type string
         model = nil, ---@type string|nil
         auto_submit = true, ---@type boolean
+        auto_fence_code = true, ---@type boolean
         prompt_user = true, ---@type boolean
         default_prompt = "Help me understand this problem and my current code.", ---@type string
         window = nil, ---@type table|nil
diff --git a/lua/leetcode/integrations/codecompanion.lua b/lua/leetcode/integrations/codecompanion.lua
index 4e5da5aa..62ca0900 100644
--- a/lua/leetcode/integrations/codecompanion.lua
+++ b/lua/leetcode/integrations/codecompanion.lua
@@ -3,6 +3,7 @@ local lc_utils = require("leetcode.utils")
 
 local M = {}
 local active_chats_by_slug = {}
+local FENCE = "````"
 
 local function notify(message, level)
     vim.notify(message, level or vim.log.levels.INFO, { title = "leetcode.nvim" })
@@ -36,6 +37,161 @@ local function bind_chat(title_slug, chat)
     active_chats_by_slug[title_slug] = chat
 end
 
+local function has_code_fence(content)
+    return type(content) == "string" and (content:find("```", 1, true) ~= nil)
+end
+
+local function is_blank(line)
+    return vim.trim(line) == ""
+end
+
+local function is_code_like_line(line)
+    local trimmed = vim.trim(line)
+    if trimmed == "" then
+        return false
+    end
+
+    if line:match("^%s%s%s%s+") or line:match("^\t+") then
+        return true
+    end
+
+    if trimmed:match("^#") or trimmed:match('^"""') or trimmed:match("^'''") then
+        return true
+    end
+
+    if trimmed:match("^class%s+[%w_]+") or trimmed:match("^def%s+[%w_]+") then
+        return true
+    end
+
+    if trimmed:match("^[%w_%.]+%s*=%s*.+") then
+        return true
+    end
+
+    if trimmed:match("^[%w_%.]+%b()%s*:?$") then
+        return true
+    end
+
+    if
+        trimmed:match("^(from|import|return|yield|break|continue|pass)%f[%W]")
+        or trimmed:match("^(if|elif|else|for|while|with|try|except|finally)%f[%W]")
+    then
+        return true
+    end
+
+    if trimmed:match("->") or trimmed:match("[%[%]{}]") then
+        return true
+    end
+
+    return false
+end
+
+local function find_trailing_code_block(lines)
+    local block_end
+    for index = #lines, 1, -1 do
+        if not is_blank(lines[index]) then
+            block_end = index
+            break
+        end
+    end
+
+    if not block_end then
+        return nil
+    end
+
+    local code_lines = 0
+    local nonempty_lines = 0
+    local block_start = block_end
+
+    for index = block_end, 1, -1 do
+        local line = lines[index]
+        if is_blank(line) then
+            block_start = index
+        elseif is_code_like_line(line) then
+            block_start = index
+            code_lines = code_lines + 1
+            nonempty_lines = nonempty_lines + 1
+        else
+            break
+        end
+    end
+
+    if nonempty_lines < 4 or code_lines < 4 then
+        return nil
+    end
+
+    if code_lines / nonempty_lines < 0.7 then
+        return nil
+    end
+
+    return block_start, block_end
+end
+
+local function auto_fence_code_blocks(content, lang)
+    if type(content) ~= "string" or content == "" or has_code_fence(content) then
+        return content, false
+    end
+
+    local lines = vim.split(content, "\n", { plain = true, trimempty = false })
+    local block_start, block_end = find_trailing_code_block(lines)
+    if not block_start or not block_end then
+        return content, false
+    end
+
+    local updated = {}
+    for index = 1, block_start - 1 do
+        table.insert(updated, lines[index])
+    end
+    table.insert(updated, ("%s%s"):format(FENCE, lang or "text"))
+    for index = block_start, block_end do
+        table.insert(updated, lines[index])
+    end
+    table.insert(updated, FENCE)
+    for index = block_end + 1, #lines do
+        table.insert(updated, lines[index])
+    end
+
+    return table.concat(updated, "\n"), true
+end
+
+local function rerender_chat(chat)
+    if not (chat and chat.ui) then
+        return
+    end
+
+    chat.ui:render(chat.buffer_context, vim.deepcopy(chat.messages), {
+        stop_context_insertion = true,
+    })
+    if chat.context then
+        chat.context:render()
+    end
+end
+
+local function normalize_latest_llm_message(chat, lang)
+    if not is_chat_valid(chat) then
+        return
+    end
+
+    for index = #chat.messages, 1, -1 do
+        local message = chat.messages[index]
+        if message.role == config.constants.LLM_ROLE and type(message.content) == "string" and message.content ~= "" then
+            message._meta = message._meta or {}
+            if message._meta.leetcode_auto_fenced then
+                return
+            end
+
+            local normalized, changed = auto_fence_code_blocks(message.content, lang)
+            if not changed then
+                return
+            end
+
+            message.content = normalized
+            message._meta.leetcode_auto_fenced = true
+            rerender_chat(chat)
+            return
+        end
+    end
+end
+
 local function unbind_chat(title_slug, chat)
     if title_slug == "" then
         return
@@ -256,6 +412,8 @@ function M.open(opts)
 
     local cc = config.user.companion or {}
     local prompt = opts.prompt or cc.default_prompt or ""
+    local auto_submit = cc.auto_submit ~= false
+    local auto_fence = cc.auto_fence_code ~= false
     local params = {
         adapter = cc.adapter,
     }
@@ -267,7 +425,7 @@ function M.open(opts)
     local context = M.build_context(question)
     local title_slug = question_slug(question)
     return codecompanion.chat({
-        auto_submit = cc.auto_submit ~= false,
+        auto_submit = auto_submit,
         ignore_system_prompt = true,
         params = params,
         title = ("LeetCode: %s"):format(context.title ~= "" and context.title or context.title_slug),
@@ -289,6 +447,11 @@ function M.open(opts)
                     }
                 )
             end,
+            on_completed = function(chat)
+                if auto_fence and auto_submit then
+                    normalize_latest_llm_message(chat, context.lang)
+                end
+            end,
             on_closed = function(chat)
                 unbind_chat(title_slug, chat)
             end,

From 1dc9a5561115daa1446578568f4b5e72446066ff Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Thu, 11 Jun 2026 04:07:27 -0700
Subject: [PATCH 23/24] feat: add .playwright-mcp/ to .gitignore to exclude
 Playwright configuration files

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index fbe24427..6a651a7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /.luarc.json
 README.zh.md
+.playwright-mcp/
\ No newline at end of file

From 6a43c5d5a7a3f46d1cbda1b046add091dedd4ab0 Mon Sep 17 00:00:00 2001
From: Jingyi Zhao <zhao.elton@gmail.com>
Date: Fri, 26 Jun 2026 00:53:58 -0700
Subject: [PATCH 24/24] feat: add AI assist toggle functionality for enhanced
 error analysis

---
 README.md                        |  9 ++++++
 lua/leetcode-ui/question.lua     | 53 +++++++++++++++++++++++++++++---
 lua/leetcode/command/init.lua    | 36 ++++++++++++++++++++++
 lua/leetcode/config/template.lua |  4 +++
 4 files changed, 98 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 453fd70f..87247f79 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ Track problems, time spent, and submissions via external services.
 This fork adds submission tracking and session management capabilities to leetcode.nvim:
 
 - **Session Timer Commands**: `:Leet timer_start` / `:Leet timer_stop`
+- **AI Assist Toggle**: `:Leet ai_assist [on|off|toggle]`
 - **Extended Hooks**: `timer_start`, `question_leave`, `on_test_result`, and improved upload hooks
 - **Submission Side Panel**: Optional left-bottom panel for past submissions
 - **External Integration**: Wire hooks to external APIs for persistence
@@ -45,6 +46,9 @@ Existing hooks also trigger on submissions:
 :Leet timer_stop           " Stop tracking (drop session without saving)
 :Leet session start        " Alias for timer_start
 :Leet session stop         " Alias for timer_stop
+:Leet ai_assist            " Toggle auto AI failure analysis for the current question
+:Leet ai_assist on         " Force auto AI failure analysis on
+:Leet ai_assist off        " Force auto AI failure analysis off
 :Leet companion            " Open a CodeCompanion chat seeded with the current LeetCode context
 ```
 
@@ -59,6 +63,9 @@ require("leetcode").setup({
         default_prompt = "Help me understand the bug in my current approach.",
         auto_fence_code = true,
     },
+    ai_assist = {
+        enabled = true,
+    },
 })
 ```
 
@@ -74,6 +81,8 @@ as hidden chat context, while the visible prompt stays focused on what you want
 
 When `auto_fence_code` is enabled, `leetcode.nvim` will also wrap obviously code-like assistant replies in a fenced code block before re-rendering the CodeCompanion buffer. This gives Treesitter a better chance to apply syntax highlighting even when the submission service forgets to fence the snippet itself.
 
+When the session timer is running, the winbar also shows `AI:on` or `AI:off` so you can see whether failed test and submit events will trigger your external static-analysis assistant.
+
 ## 📡 External Integration Example
 
 Connect to a submission server to save data:
diff --git a/lua/leetcode-ui/question.lua b/lua/leetcode-ui/question.lua
index b62c105b..f7124401 100644
--- a/lua/leetcode-ui/question.lua
+++ b/lua/leetcode-ui/question.lua
@@ -25,6 +25,54 @@ local log = require("leetcode.logger")
 ---@field reset boolean
 local Question = Object("LeetQuestion")
 
+local function ai_assist_default_enabled()
+    local ai_assist = config.user.ai_assist or {}
+    return ai_assist.enabled ~= false
+end
+
+local function ai_assist_label(enabled)
+    local state = enabled and "on" or "off"
+    local hl = enabled and "leetcode_easy" or "leetcode_error"
+    return string.format(" %%#leetcode_alt#AI%%*:%%#%s#%s%%*", hl, state)
+end
+
+function Question:is_auto_ai_assist_enabled()
+    if self._auto_ai_assist_enabled == nil then
+        self._auto_ai_assist_enabled = ai_assist_default_enabled()
+    end
+    return self._auto_ai_assist_enabled
+end
+
+function Question:set_auto_ai_assist_enabled(enabled)
+    self._auto_ai_assist_enabled = not not enabled
+    if self._session_timer then
+        self:render_session_winbar()
+    end
+end
+
+function Question:toggle_auto_ai_assist()
+    local enabled = not self:is_auto_ai_assist_enabled()
+    self:set_auto_ai_assist_enabled(enabled)
+    return enabled
+end
+
+function Question:render_session_winbar(elapsed_s)
+    if not (self.winid and vim.api.nvim_win_is_valid(self.winid)) then
+        return
+    end
+
+    elapsed_s = elapsed_s or 0
+    local mins = math.floor(elapsed_s / 60)
+    local secs = elapsed_s % 60
+    local label = string.format(
+        " %%#leetcode_timer#⏱ %02d:%02d%%*%s",
+        mins,
+        secs,
+        ai_assist_label(self:is_auto_ai_assist_enabled())
+    )
+    vim.api.nvim_set_option_value("winbar", label, { win = self.winid })
+end
+
 ---@param raw? boolean
 function Question:snippet(raw)
     local snippets = self.q.code_snippets ~= vim.NIL and self.q.code_snippets or {}
@@ -347,15 +395,12 @@ function Question:start_timer_display()
 
     local function update_winbar()
         local elapsed_s = math.floor((vim.loop.hrtime() / 1e6 - start_ms) / 1000)
-        local mins = math.floor(elapsed_s / 60)
-        local secs = elapsed_s % 60
-        local label = string.format(" %%#leetcode_timer#⏱ %02d:%02d%%*", mins, secs)
         vim.schedule(function()
             if not (self.winid and vim.api.nvim_win_is_valid(self.winid)) then
                 self:stop_timer_display()
                 return
             end
-            vim.api.nvim_set_option_value("winbar", label, { win = self.winid })
+            self:render_session_winbar(elapsed_s)
         end)
     end
 
diff --git a/lua/leetcode/command/init.lua b/lua/leetcode/command/init.lua
index ec12bb85..ed8ae833 100644
--- a/lua/leetcode/command/init.lua
+++ b/lua/leetcode/command/init.lua
@@ -295,6 +295,36 @@ function cmd.timer_stop()
     utils.exec_hooks("timer_stop", q)
 end
 
+local function set_ai_assist(enabled)
+    local utils = require("leetcode.utils")
+    local q = utils.curr_question()
+    if not q then
+        return
+    end
+
+    q:set_auto_ai_assist_enabled(enabled)
+    log.info(("Auto AI assist %s"):format(enabled and "on" or "off"))
+end
+
+function cmd.ai_assist()
+    local utils = require("leetcode.utils")
+    local q = utils.curr_question()
+    if not q then
+        return
+    end
+
+    local enabled = q:toggle_auto_ai_assist()
+    log.info(("Auto AI assist %s"):format(enabled and "on" or "off"))
+end
+
+function cmd.ai_assist_on()
+    set_ai_assist(true)
+end
+
+function cmd.ai_assist_off()
+    set_ai_assist(false)
+end
+
 function cmd.q_upload_test_result()
     local utils = require("leetcode.utils")
     utils.auth_guard()
@@ -664,6 +694,12 @@ cmd.commands = {
     inject = { cmd.inject },
     fold = { cmd.fold },
     companion = { cmd.companion },
+    ai_assist = {
+        cmd.ai_assist,
+        on = { cmd.ai_assist_on },
+        off = { cmd.ai_assist_off },
+        toggle = { cmd.ai_assist },
+    },
     -- session = {
     --     change = {
     --         cmd.change_session,
diff --git a/lua/leetcode/config/template.lua b/lua/leetcode/config/template.lua
index 6b46f7d5..40f4a149 100644
--- a/lua/leetcode/config/template.lua
+++ b/lua/leetcode/config/template.lua
@@ -134,6 +134,10 @@ local M = {
         window = nil, ---@type table|nil
     },
 
+    ai_assist = {
+        enabled = true, ---@type boolean
+    },
+
     hooks = {
         ---@type fun()[]
         ["enter"] = {},