From 23341d803cf356a70791aff3b9c17ac0c1bc982b Mon Sep 17 00:00:00 2001
From: Johannes Schriewer <hallo@dunkelstern.de>
Date: Sun, 30 Aug 2026 19:21:39 +0200
Subject: [PATCH] Bugfix: Cursor for journal tab not applied correctly causing
 duplicated entries

---
 ...code_session_journal_append_2026-08-30.txt | 1032 +++++++++++++++++
 templates/index.html                          |    2 +-
 2 files changed, 1033 insertions(+), 1 deletion(-)
 create mode 100644 opencode_session_journal_append_2026-08-30.txt

diff --git a/opencode_session_journal_append_2026-08-30.txt b/opencode_session_journal_append_2026-08-30.txt
new file mode 100644
index 0000000..caea5eb
--- /dev/null
+++ b/opencode_session_journal_append_2026-08-30.txt
@@ -0,0 +1,1032 @@
+mac  2026-08-29 19:21:05 → now  1 session(s)
+
+Session  Started           Where           Title
+Mw5UrR   2026-08-30 19:10  Code/dashboard  Fix journal display repeating buffered output on interna…
+
+
+ ⚑ ❬Mw5UrR❭ Fix journal display repeating buffered output on internal reload        ~/Code/dashboard
+────────────────────────────────────────────────────────────────────────────────────────────────────
+
+  │ 2026-08-30 19:10:24 • user
+  │
+  │ The journal display repeats output on internal reload. It seems that it appends all journal
+  │ output that is in the buffer to the text field instead of only appending new lines.
+
+
+  │ 2026-08-30 19:10:25 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ The user is reporting a bug in the journal display. On internal reload (polling), all journal
+  │ output within the buffer is being appended to the text field, instead of only new lines.
+  │
+  │ This is plan mode — I need to investigate the codebase to understand the journal implementation,
+  │ and then propose a plan. Let me look at the journal-related files.
+  │
+  │ Let's explore:
+  │ - `app/journal.py` — the `journalctl -o export` parser with cursors
+  │ - `app/routers/` — journal tab endpoints
+  │ - `templates/` — journal templates
+  │
+  │ Let's read these files.
+  │
+  │ read /home/mac/Code/dashboard/app/journal.py                                         ok     0.0s
+  │   in
+  │     {
+  │       "filePath": "/home/mac/Code/dashboard/app/journal.py"
+  │     }
+  │   out
+  │     <path>/home/mac/Code/dashboard/app/journal.py</path>
+  │     <type>file</type>
+  │     <content>
+  │     1: import asyncio
+  │     2: import re
+  │     3: from datetime import UTC, datetime
+  │     4: from typing import Any
+  │     5:
+  │     6: CURSOR_RE = re.compile(r"^[A-Za-z0-9;:=+./_-]+$")
+  │     7: LEVELS = {"all": None, "warn": "warning", "err": "err"}
+  │     8: FIELD_RE = re.compile(r"^([A-Z_][A-Z0-9_]*)=")
+  │     9:
+  │     10:
+  │     11: def parse_export(text: str) -> list[dict[str, Any]]:
+  │     12:     entries: list[dict[str, Any]] = []
+  │     13:     cur: dict[str, Any] | None = None
+  │     14:     last_key: str | None = None
+  │     15:     for raw in text.splitlines():
+  │     16:         if raw == "":
+  │     17:             if cur is not None:
+  │     18:                 entries.append(cur)
+  │     19:             cur, last_key = None, None
+  │     20:             continue
+  │     21:         m = FIELD_RE.match(raw)
+  │     22:         if m:
+  │     23:             if cur is None:
+  │     24:                 cur = {}
+  │     25:             last_key = m.group(1)
+  │     26:             if last_key is not None:
+  │     27:                 cur[last_key] = raw[m.end():]
+  │     28:         elif cur is not None and last_key is not None:
+  │     29:             cur[last_key] += "\n" + raw
+  │     30:     if cur is not None:
+  │     31:         entries.append(cur)
+  │     32:     return entries
+  │     33:
+  │     34:
+  │     35: def format_entries(entries: list[dict[str, Any]]) -> list[dict[str, Any]]:
+  │     36:     out: list[dict[str, Any]] = []
+  │     37:     for e in entries:
+  │     38:         ts = e.get("__REALTIME_TIMESTAMP")
+  │     39:         if ts is None:
+  │     40:             continue
+  │     41:         stamp = ""
+  │     42:         try:
+  │     43:             dt = datetime.fromtimestamp(int(ts) / 1e6, tz=UTC).astimezone()
+  │     44:             stamp = dt.strftime("%H:%M:%S")
+  │     45:         except (ValueError, OSError, TypeError):
+  │     46:             pass
+  │     47:         try:
+  │     48:             prio = int(e.get("PRIORITY", "6"))
+  │     49:         except ValueError:
+  │     50:             prio = 6
+  │     51:         msg = e.get("MESSAGE", "").rstrip("\n")
+  │     52:         out.append(
+  │     53:             {
+  │     54:                 "stamp": stamp,
+  │     55:                 "prio": prio,
+  │     56:                 "ident": e.get("SYSLOG_IDENTIF
+  │     … [1722 more chars]
+  │ glob app/routers/*.py                                                                ok     0.0s
+  │   in
+  │     {
+  │       "pattern": "app/routers/*.py"
+  │     }
+  │   out
+  │     /home/mac/Code/dashboard/app/routers/journal.py
+  │     /home/mac/Code/dashboard/app/routers/overview.py
+  │     /home/mac/Code/dashboard/app/routers/processes.py
+  │     /home/mac/Code/dashboard/app/routers/__init__.py
+  │     /home/mac/Code/dashboard/app/routers/disks.py
+  │     /home/mac/Code/dashboard/app/routers/plugins.py
+  │     /home/mac/Code/dashboard/app/routers/services.py
+  │ glob templates/*.html                                                                ok     0.0s
+  │   in
+  │     {
+  │       "pattern": "templates/*.html"
+  │     }
+  │   out
+  │     /home/mac/Code/dashboard/templates/index.html
+  │     /home/mac/Code/dashboard/templates/journal.html
+  │     /home/mac/Code/dashboard/templates/overview.html
+  │     /home/mac/Code/dashboard/templates/processes.html
+  │     /home/mac/Code/dashboard/templates/disks.html
+  │     /home/mac/Code/dashboard/templates/service_detail.html
+  │     /home/mac/Code/dashboard/templates/services.html
+  │     /home/mac/Code/dashboard/templates/plugins.html
+  │
+  │ tokens 9229 in 220 out 0 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:10:45 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Let's try reading the journal router and template.
+  │
+  │ read /home/mac/Code/dashboard/app/routers/journal.py                                 ok     0.0s
+  │   in
+  │     {
+  │       "filePath": "/home/mac/Code/dashboard/app/routers/journal.py"
+  │     }
+  │   out
+  │     <path>/home/mac/Code/dashboard/app/routers/journal.py</path>
+  │     <type>file</type>
+  │     <content>
+  │     1: from typing import Any
+  │     2:
+  │     3: from fastapi import APIRouter, Request
+  │     4: from fastapi.responses import HTMLResponse
+  │     5:
+  │     6: from app import journal
+  │     7: from app.render import render
+  │     8:
+  │     9: router = APIRouter(prefix="/api", tags=["journal"])
+  │     10:
+  │     11:
+  │     12: @router.get("/journal")
+  │     13: async def journal_view(
+  │     14:     _request: Request,
+  │     15:     level: str = "all",
+  │     16:     unit: str = "",
+  │     17:     search: str = "",
+  │     18:     cursor: str = "",
+  │     19:     hide_sudo: str = "",
+  │     20: ):
+  │     21:     if level not in journal.LEVELS:
+  │     22:         level = "all"
+  │     23:     lines = 200 if cursor else 100
+  │     24:     error = None
+  │     25:     entries: list[dict[str, Any]] = []
+  │     26:     next_cursor = ""
+  │     27:     try:
+  │     28:         entries, nc = await journal.tail(
+  │     29:             cursor or None,
+  │     30:             level,
+  │     31:             unit or None,
+  │     32:             search or None,
+  │     33:             lines,
+  │     34:             hide_sudo=(hide_sudo == "on"),
+  │     35:         )
+  │     36:         next_cursor = nc or ""
+  │     37:         entries = entries[-400:]
+  │     38:     except (RuntimeError, OSError) as e:
+  │     39:         error = str(e)[:300]
+  │     40:     return HTMLResponse(
+  │     41:         render(
+  │     42:             "journal.html",
+  │     43:             entries=entries,
+  │     44:             next_cursor=next_cursor,
+  │     45:             level=level,
+  │     46:             unit=unit,
+  │     47:             search=search,
+  │     48:             error=error,
+  │     49:         )
+  │     50:     )
+  │
+  │     (End of file - total 50 lines)
+  │     </content>
+  │ read /home/mac/Code/dashboard/templates/journal.html                                 ok     0.0s
+  │   in
+  │     {
+  │       "filePath": "/home/mac/Code/dashboard/templates/journal.html"
+  │     }
+  │   out
+  │     <path>/home/mac/Code/dashboard/templates/journal.html</path>
+  │     <type>file</type>
+  │     <content>
+  │     1: {% if error %}
+  │     2: <div class="jline j-error-once"><span class="muted">journalctl: {{ error }}</span></div>
+  │     3: {% endif %}
+  │     4: {% for e in entries %}
+  │     5: <div class="jline{% if e.prio <= 3 %} j-err{% elif e.prio == 4 %} j-warn{% endif %}"
+  │     data-cursor="{{ e.cursor }}">
+  │     6:   <span class="j-time">{{ e.stamp }}</span>
+  │     7:   <span class="j-ident">{{ e.ident }}</span>
+  │     8:   <span class="j-msg">{{ e.msg }}</span>
+  │     9: </div>
+  │     10: {% endfor %}
+  │
+  │     (End of file - total 10 lines)
+  │     </content>
+  │
+  │ tokens 1459 in 81 out 9449 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:10:49 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Next, let's take a look at index.html to check how the journal tab is being rendered, and how
+  │ htmx polling is configured. The journal.html template itself is just a fragment of entries.
+  │ There should be a parent element with an hx-get that reloads it. Let me search for journal in
+  │ index.html.
+  │
+  │ grep journal                                                                         ok     0.0s
+  │   in
+  │     {
+  │       "pattern": "journal",
+  │       "path": "/home/mac/Code/dashboard/templates/index.html"
+  │     }
+  │   out
+  │     Found 8 matches
+  │     /home/mac/Code/dashboard/templates/journal.html:
+  │       Line 2: <div class="jline j-error-once"><span class="muted">journalctl: {{ error
+  │       }}</span></div>
+  │
+  │
+  │     /home/mac/Code/dashboard/templates/index.html:
+  │       Line 18:     <button class="tab-btn" data-tab="journal">Journal</button>
+  │
+  │       Line 58:   <section id="tab-journal" class="tab hidden">
+  │
+  │       Line 59:     <div id="journal-status" class="muted small"></div>
+  │
+  │       Line 60:     <form id="journal-filters" class="inline-form" hx-get="/api/journal"
+  │       hx-target="#journal-log" hx-swap="innerHTML">
+  │
+  │       Line 71:     <div id="journal-logwrap">
+  │
+  │       Line 72:       <input type="hidden" id="journal-cursor" value="">
+  │
+  │       Line 73:       <div id="journal-log" hx-get="/api/journal" hx-trigger="load, every 5s"
+  │       hx-swap="beforeend" hx-include="#journal-filters, #journal-cursor"></div>
+  │
+  │ tokens 738 in 112 out 10988 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:10:52 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Now I understand the mechanism:
+  │
+  │ - `#journal-log` is a div with `hx-get="/api/journal" hx-trigger="load, every 5s"
+  │ hx-swap="beforeend" hx-include="#journal-filters, #journal-cursor"`
+  │ - The hidden input `#journal-cursor` presumably holds the cursor. The router receives `cursor`
+  │ and uses `--after-cursor` to only fetch entries after that cursor.
+  │
+  │ Bug: "The journal display duplicates output on internal reload. It looks like it appends all the
+  │ journal output in the buffer to the text field, rather than just appending new lines."
+  │
+  │ So on the first load (no cursor), the initial 100 lines are fetched, and next_cursor is
+  │ computed. But where is next_cursor stored? The router renders `journal.html` with `entries` and
+  │ `next_cursor`... but the journal.html template doesn't reference `next_cursor` at all! Let me
+  │ verify — the template only renders entries. So the hidden input `#journal-cursor` is never
+  │ updated. That means every poll sends `cursor=""`, and the router fetches the latest 100 lines
+  │ again and appends them with `beforeend` — duplicating all 100 lines on each 5-second reload.
+  │
+  │ Wait, but is there JS in index.html that updates the cursor? Let me read all of index.html to
+  │ check the JS that updates `#journal-cursor`.
+  │
+  │ read /home/mac/Code/dashboard/templates/index.html                                   ok     0.0s
+  │   in
+  │     {
+  │       "filePath": "/home/mac/Code/dashboard/templates/index.html"
+  │     }
+  │   out
+  │     <path>/home/mac/Code/dashboard/templates/index.html</path>
+  │     <type>file</type>
+  │     <content>
+  │     1: <!doctype html>
+  │     2: <html lang="en">
+  │     3: <head>
+  │     4: <meta charset="utf-8">
+  │     5: <meta name="viewport" content="width=device-width, initial-scale=1">
+  │     6: <title>{{ hostname }}</title>
+  │     7: <link rel="stylesheet" href="/static/css/style.css">
+  │     8: <script src="/static/vendor/htmx.min.js"></script>
+  │     9: <script src="/static/vendor/chart.umd.min.js"></script>
+  │     10: </head>
+  │     11: <body>
+  │     12: <header class="topbar">
+  │     13:   <h1>{{ hostname }}</h1>
+  │     14:   <nav id="tabs">
+  │     15:     <button class="tab-btn active" data-tab="overview">Overview</button>
+  │     16:     <button class="tab-btn" data-tab="disks">Disks</button>
+  │     17:     <button class="tab-btn" data-tab="processes">Processes</button>
+  │     18:     <button class="tab-btn" data-tab="journal">Journal</button>
+  │     19:     <button class="tab-btn" data-tab="services">Services</button>
+  │     20:     <button class="tab-btn" data-tab="plugins">Plugins</button>
+  │     21:   </nav>
+  │     22: </header>
+  │     23: <main>
+  │     24:   <section id="tab-overview" class="tab">
+  │     25:     <div id="overview" class="panel" hx-get="/api/overview" hx-trigger="load, every 2s"
+  │     hx-swap="outerHTML"></div>
+  │     26:     <div class="charts-grid">
+  │     27:       <div class="chart-card"><h3>CPU / GPU %</h3><canvas id="chart-cpu"></canvas></div>
+  │     28:       <div class="chart-card"><h3>Memory / VRAM %</h3><canvas
+  │     id="chart-mem"></canvas></div>
+  │     29:       <div class="chart-card"><h3>Disk I/O</h3><canvas id="chart-io"></canvas></div>
+  │     30:     </div>
+  │     31:   </section>
+  │     32:
+  │     33:   <section id="tab-disks" class="tab hidden">
+  │     34:     <div id="disks" class="panel" hx-get="/api/disks" hx-trigger="load, every 2s"
+  │     hx-swap="outerHTML"></div>
+  │     35:   </section>
+  │     36:
+  │     37:   <section id="tab-processes" class="tab hidden">
+  │     38:     <form id="proc-controls" class="inline-form" hx-get="/api/processes"
+  │     hx-target="#processes-body" hx-swap="outerHTML">
+  │     39:       <input id="proc-q" name="q" placeholder="filter name / pid">
+  │     40:       <select name="sort" id="proc-sort">
+  │     41:
+  │     … [3010 more chars]
+  │
+  │ tokens 274 in 336 out 11837 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:11:01 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Next, let's check app.js to see whether the cursor input is being updated, and whether there's
+  │ scroll handling.
+  │
+  │ read /home/mac/Code/dashboard/static/js/app.js                                       ok     0.0s
+  │   in
+  │     {
+  │       "filePath": "/home/mac/Code/dashboard/static/js/app.js"
+  │     }
+  │   out
+  │     <path>/home/mac/Code/dashboard/static/js/app.js</path>
+  │     <type>file</type>
+  │     <content>
+  │     1: (function () {
+  │     2:   "use strict";
+  │     3:
+  │     4:   // ---------- tabs ----------
+  │     5:   const tabBtns = document.querySelectorAll(".tab-btn");
+  │     6:   const sections = document.querySelectorAll(".tab");
+  │     7:
+  │     8:   function showTab(name) {
+  │     9:     tabBtns.forEach((b) => b.classList.toggle("active", b.dataset.tab === name));
+  │     10:     sections.forEach((s) => s.classList.toggle("hidden", s.id !== "tab-" + name));
+  │     11:     try {
+  │     12:       localStorage.setItem("dash.tab", name);
+  │     13:     } catch (e) {}
+  │     14:   }
+  │     15:   tabBtns.forEach((b) => b.addEventListener("click", () => showTab(b.dataset.tab)));
+  │     16:   try {
+  │     17:     const saved = localStorage.getItem("dash.tab");
+  │     18:     if (saved && document.getElementById("tab-" + saved)) showTab(saved);
+  │     19:   } catch (e) {}
+  │     20:
+  │     21:   // ---------- helpers ----------
+  │     22:   function fmtBytes(n, digits) {
+  │     23:     if (n == null || isNaN(n)) return "—";
+  │     24:     if (digits == null) digits = 1;
+  │     25:     const u = ["B", "KiB", "MiB", "GiB", "TiB"];
+  │     26:     let i = 0;
+  │     27:     while (Math.abs(n) >= 1024 && i < u.length - 1) {
+  │     28:       n /= 1024;
+  │     29:       i++;
+  │     30:     }
+  │     31:     return n.toFixed(digits) + " " + u[i];
+  │     32:   }
+  │     33:
+  │     34:   function fmtTime(ts) {
+  │     35:     const d = new Date(ts * 1000);
+  │     36:     return d.toLocaleTimeString([], { hour12: false });
+  │     37:   }
+  │     38:
+  │     39:   // ---------- charts ----------
+  │     40:   const charts = {};
+  │     41:
+  │     42:   function baseOpts(extra) {
+  │     43:     const o = {
+  │     44:       animation: false,
+  │     45:       responsive: true,
+  │     46:       maintainAspectRatio: false,
+  │     47:       interaction: { mode: "index", intersect: false },
+  │     48:       plugins: { legend: { display: false } },
+  │     49:       scales: {
+  │     50:         x: { ticks: { maxTicksLimit: 7, maxRotation: 0, color: "#7d8a9c" }, grid: {
+  │     display: false } },
+  │     51:         y: { beginAtZero: true, ticks: { color: "#7d8a9c" }, grid: { color:
+  │     "rgba(42,51,66,.5)" } },
+  │     52:       },
+  │     53:     };
+  │     54:     if (extra) Object.assign(o.scal
+  │     … [5741 more chars]
+  │
+  │ tokens 1731 in 60 out 12448 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:11:04 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Okay, now I understand the whole mechanism. Let me analyze the bug.
+  │
+  │ Flow:
+  │ 1. First load (no cursor): the router fetches the most recent 100 lines, returns them, and the
+  │ JS sets `journalCursor.value` to the cursor of the last line.
+  │ 2. Every 5 seconds: hx-get with the `cursor` parameter. The router calls `journal.tail(cursor,
+  │ ...)`, using `--after-cursor` to fetch entries *after* the cursor. Entries after the cursor are
+  │ appended.
+  │
+  │ Wait a sec — so if the cursor is being tracked correctly, why is the output being repeated?
+  │
+  │ Possible causes of duplication:
+  │
+  │ 1. **Trimming (MAX_LINES) invalidates the cursor**: The JS trims `#journal-log` to 500 lines
+  │ (MAX_LINES = 500). The cursor is tracked from the last line — since it trims from the top, the
+  │ cursor remains valid (points to the last displayed line, which is the most recent). Actually,
+  │ trimming removes old lines, so cursor = cursor of the last line — no problem.
+  │
+  │    Wait, but there's a subtle point: `journalCursor.value = last.dataset.cursor` — if the
+  │    response had 0 new entries (the `entries` list is empty), the template renders nothing,
+  │    `lines` is the existing lines in the DOM, and `last` is the last existing line, whose cursor
+  │    is the same as what's already stored. No problem.
+  │
+  │    Hmm, wait, actually there's a subtle issue: `document.querySelectorAll(".jline")` is scoped
+  │    to `journalLog` — no problem.
+  │
+  │ 2. **`--after-cursor` semantics**: `--after-cursor` shows entries *after* the cursor, not
+  │ including the entry at the cursor position. So no duplication there... except in the case where
+  │ the cursor points to an entry that was already fetched... Let me think about the hide_sudo case:
+  │
+  │    In `tail()`, when `hide_sudo` is on, it fetches `lines * 2` entries and then filters out sudo
+  │    entries. `last_cursor = entries[-1]["cursor"]` — this is the cursor of the last *non-sudo*
+  │    entry after filtering. Okay, that's consistent — the cursor tracks the last *displayed*
+  │    entry.
+  │
+  │ 3. **The real bug**: Let me re-read. "On internal reload, the j
+  │ … [18404 more chars]
+  │
+  │ bash ls -la static/vendor/ && git log --oneline -8 -- app/journal.py app/routers/…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "ls -la static/vendor/ && git log --oneline -8 -- app/journal.py
+  │       app/routers/journal.py templates/journal.html templates/index.html static/js/app.js"
+  │     }
+  │   out
+  │     total 252
+  │     drwxr-xr-x 1 mac mac     54 29. Aug 20:07 .
+  │     drwxr-xr-x 1 mac mac     22 29. Aug 21:19 ..
+  │     -rw-r--r-- 1 mac mac 205125 29. Aug 20:07 chart.umd.min.js
+  │     -rw-r--r-- 1 mac mac  48101 29. Aug 20:07 htmx.min.js
+  │     9fa4e15 Bugfix: Flickering overview charts because of bad choice of point reducing method
+  │     6fdfde8 Initial commit
+  │ grep name                                                                            ok     0.0s
+  │   in
+  │     {
+  │       "pattern": "name",
+  │       "path": "/home/mac/Code/dashboard/static/vendor",
+  │       "include": "htmx.min.js"
+  │     }
+  │   out
+  │     Found 1 matches
+  │     /home/mac/Code/dashboard/static/vendor/htmx.min.js:
+  │       Line 1: (function(e,t){if(typeof define==="function"&&define.amd){define([],t)}else
+  │       if(typeof
+  │       module==="object"&&module.exports){module.exports=t()}else{e.htmx=e.htmx||t()}})(typeof
+  │       self!=="undefined"?self:this,function(){return function(){"use strict";var
+  │       Q={onLoad:F,process:zt,on:de,off:ge,trigger:ce,ajax:Nr,find:C,findAll:f,closest:v,values:f
+  │       unction(e,t){var r=dr(e,t||"post");return
+  │       r.values},remove:_,addClass:z,removeClass:n,toggleClass:$,takeClass:W,defineExtension:Ur,r
+  │       emoveExtension:Br,logAll:V,logNone:j,logger:null,config:{historyEnabled:true,historyCacheS
+  │       ize:10,refreshOnHistoryMiss:false,defaultSwapStyle:"innerHTML",defaultSwapDelay:0,defaultS
+  │       ettleDelay:20,includeIndicatorStyles:true,indicatorClass:"htmx-indicator",requestClass:"ht
+  │       mx-request",addedClass:"htmx-added",settlingClass:"htmx-settling",swappingClass:"htmx-swap
+  │       ping",allowEval:true,allowScriptTags:true,inlineScriptNonce:"",attributesToSettle:["class"
+  │       ,"style","width","height"],withCredentials:false,timeout:0,wsReconnectDelay:"full-jitter",
+  │       wsBinaryType:"blob",disableSelector:"[hx-disable],
+  │       [data-hx-disable]",useTemplateFragments:false,scrollBehavior:"smooth",defaultFocusScroll:f
+  │       alse,getCacheBusterParam:false,globalViewTransitions:false,methodsThatUseUrlParams:["get"]
+  │       ,selfRequestsOnly:false,ignoreTitle:false,scrollIntoViewOnBoost:true,triggerSpecsCache:nul
+  │       l},parseInterval:d,_:t,createEventSource:function(e){return new
+  │       EventSource(e,{withCredentials:true})},createWebSocket:function(e){var t=new
+  │       WebSocket(e,[]);t.binaryType=Q.config.wsBinaryType;return t},version:"1.9.12"};var
+  │       r={addTriggerHandler:Lt,bodyContains:se,canAccessLocalStorage:U,findThisElement:xe,filterV
+  │       alues:yr,hasAttribute:o,getAttributeValue:te,getClosestAttributeValue:ne,getClosestMatch:c
+  │       ,getExpressionVars:Hr,getHeaders:xr,getInputValues:dr,getInternalData:ae,getSwapSpecificat
+  │       ion:wr,getTriggerSpecs:it,getTarget:ye,makeFragment:l,mergeObjects:le,makeSettleInfo:T,oob
+  │       Swap:E
+  │     … [81 more chars]
+  │
+  │ tokens 2714 in 5386 out 14239 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:13:21 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ The minified file is one long line. Let me search for input collection logic. In htmx 1.9.12,
+  │ the function that collects input values is `dr`. Let me look for the part that filters inputs by
+  │ name. I'll search for patterns like `.name` or `attrInput` in the minified file. Let me try
+  │ extracting the relevant part with grep using a specific pattern.
+  │
+  │ bash rg -o 'function dr\([^}]*' static/vendor/htmx.min.js | head -50; echo ---; r…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "rg -o 'function dr\\([^}]*' static/vendor/htmx.min.js | head -50; echo ---; rg
+  │       -o 'querySelectorAll\\([^)]*\\)' static/vendor/htmx.min.js | sort -u | head"
+  │     }
+  │   out
+  │     function dr(e,t){var r=[];var n={
+  │     ---
+  │     querySelectorAll("[hx-trigger='restored'],[data-hx-trigger='restored']")
+  │     querySelectorAll("[hx-trigger='revealed'],[data-hx-trigger='revealed']")
+  │     querySelectorAll("[id]")
+  │     querySelectorAll(i+t+", form, [type='submit'], [hx-sse], [data-hx-sse], [hx-ws],"+"
+  │     [data-hx-ws], [hx-ext], [data-hx-ext], [hx-trigger], [data-hx-trigger], [hx-on],
+  │     [data-hx-on]")
+  │     querySelectorAll(J(t)
+  │     querySelectorAll(n)
+  │     querySelectorAll("option:checked")
+  │     querySelectorAll(rt)
+  │     querySelectorAll("script")
+  │     querySelectorAll(t)
+  │
+  │ tokens 748 in 164 out 22340 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:13:27 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Let's extract the `dr` function more completely — this is getInputValues. Since the file is
+  │ minified into a single line, we need to extract the substring. Let me use python to print out
+  │ the region around `function dr(`.
+  │
+  │ bash python3 - <<'EOF' import re src = open('static/vendor/htmx.min.js').read() i…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "python3 - <<'EOF'\nimport re\nsrc =
+  │       open('static/vendor/htmx.min.js').read()\ni = src.find('function
+  │       dr(')\nprint(src[i:i+1600])\nEOF"
+  │     }
+  │   out function dr(e,t){var r=[];var n={};var i={};var a=[];var
+  │   o=ae(e);if(o.lastButtonClicked&&!se(o.lastButtonClicked)){o.lastButtonClicked=null}var
+  │   s=h(e,"form")&&e.noValidate!==true||te(e,"hx-validate")==="true";if(o.lastButtonClicked){s=s&&
+  │   o.lastButtonClicked.formNoValidate!==true}if(t!=="get"){hr(r,i,a,v(e,"form"),s)}hr(r,n,a,e,s);
+  │   if(o.lastButtonClicked||e.tagName==="BUTTON"||e.tagName==="INPUT"&&ee(e,"type")==="submit"){va
+  │   r l=o.lastButtonClicked||e;var u=ee(l,"name");cr(u,l.value,i)}var
+  │   f=me(e,"hx-include");oe(f,function(e){hr(r,n,a,e,s);if(!h(e,"form")){oe(e.querySelectorAll(rt)
+  │   ,function(e){hr(r,n,a,e,s)})}});n=le(n,i);return{errors:a,values:n}}function
+  │   gr(e,t,r){if(e!==""){e+="&"}if(String(r)==="[object Object]"){r=JSON.stringify(r)}var
+  │   n=encodeURIComponent(r);e+=encodeURIComponent(t)+"="+n;return e}function pr(e){var
+  │   t="";for(var r in e){if(e.hasOwnProperty(r)){var
+  │   n=e[r];if(Array.isArray(n)){oe(n,function(e){t=gr(t,r,e)})}else{t=gr(t,r,n)}}}return
+  │   t}function mr(e){var t=new FormData;for(var r in e){if(e.hasOwnProperty(r)){var
+  │   n=e[r];if(Array.isArray(n)){oe(n,function(e){t.append(r,e)})}else{t.append(r,n)}}}return
+  │   t}function xr(e,t,r){var
+  │   n={"HX-Request":"true","HX-Trigger":ee(e,"id"),"HX-Trigger-Name":ee(e,"name"),"HX-Target":te(t
+  │   ,"id"),"HX-Current-URL":re().location.href};Rr(e,"hx-headers",false,n);if(r!==undefined){n["HX
+  │   -Prompt"]=r}if(ae(e).boosted){n["HX-Boosted"]="true"}return n}function yr(t,e){var
+  │   r=ne(e,"hx-params");if(r){if(r==="none"){return{}}else if(r==="*"){return t}else
+  │   if(r.indexOf("not ")===0){oe(r.substr(4).split(","),function(e){e=e.trim();delete t[e]})
+  │
+  │ tokens 176 in 125 out 23253 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:13:30 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Next, let's look at the `hr` function, i.e., the function that processes inputs into the `r`/`n`
+  │ arrays.
+  │
+  │ bash python3 - <<'EOF' import re src = open('static/vendor/htmx.min.js').read() i…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "python3 - <<'EOF'\nimport re\nsrc =
+  │       open('static/vendor/htmx.min.js').read()\ni = src.find('function
+  │       hr(')\nprint(src[i:i+900])\nprint('---vr---')\nj = src.find('function
+  │       vr(')\nprint(src[j:j+700] if j != -1 else 'not found')\nEOF"
+  │     }
+  │   out
+  │     function hr(t,r,n,e,i){if(e==null||ur(t,e)){return}else{t.push(e)}if(fr(e)){var
+  │     a=ee(e,"name");var
+  │     o=e.value;if(e.multiple&&e.tagName==="SELECT"){o=M(e.querySelectorAll("option:checked")).map
+  │     (function(e){return
+  │     e.value})}if(e.files){o=M(e.files)}cr(a,o,r);if(i){vr(e,n)}}if(h(e,"form")){var
+  │     s=e.elements;oe(s,function(e){hr(t,r,n,e,i)})}}function
+  │     vr(e,t){if(e.willValidate){ce(e,"htmx:validation:validate");if(!e.checkValidity()){t.push({e
+  │     lt:e,message:e.validationMessage,validity:e.validity});ce(e,"htmx:validation:failed",{messag
+  │     e:e.validationMessage,validity:e.validity})}}}function dr(e,t){var r=[];var n={};var
+  │     i={};var a=[];var
+  │     o=ae(e);if(o.lastButtonClicked&&!se(o.lastButtonClicked)){o.lastButtonClicked=null}var
+  │     s=h(e,"form")&&e.noValidate!==true||te(e,"hx-validate")==="true";if(o.lastButtonClicked){s=s
+  │     &&o.lastButtonClicked.formNoValidate!==true}if(t!=="get"){hr(r,i,a,v(e,"form"),s)}hr(r,
+  │     ---vr---
+  │     function
+  │     vr(e,t){if(e.willValidate){ce(e,"htmx:validation:validate");if(!e.checkValidity()){t.push({e
+  │     lt:e,message:e.validationMessage,validity:e.validity});ce(e,"htmx:validation:failed",{messag
+  │     e:e.validationMessage,validity:e.validity})}}}function dr(e,t){var r=[];var n={};var
+  │     i={};var a=[];var
+  │     o=ae(e);if(o.lastButtonClicked&&!se(o.lastButtonClicked)){o.lastButtonClicked=null}var
+  │     s=h(e,"form")&&e.noValidate!==true||te(e,"hx-validate")==="true";if(o.lastButtonClicked){s=s
+  │     &&o.lastButtonClicked.formNoValidate!==true}if(t!=="get"){hr(r,i,a,v(e,"form"),s)}hr(r,n,a,e
+  │     ,s);if(o.lastButtonClicked||e.tagName==="BUTTON"||e.tagName==="INPUT"&&ee(e,"type")==="submi
+  │     t"){var l=o.lastButtonClicked||e;var u=ee
+  │
+  │ tokens 554 in 143 out 23554 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:13:34 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Now let's look at `cr` (the function that adds name/value to the dictionary) and check whether
+  │ it skips empty names:
+  │
+  │ bash python3 - <<'EOF' src = open('static/vendor/htmx.min.js').read() i = src.fin…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "python3 - <<'EOF'\nsrc = open('static/vendor/htmx.min.js').read()\ni =
+  │       src.find('function cr(')\nprint(src[i:i+400])\nprint('---ee---')\nj = src.find('function
+  │       ee(')\nprint(src[j:j+200])\nEOF"
+  │     }
+  │   out
+  │     function cr(e,t,r){if(e!=null&&t!=null){var n=r[e];if(n===undefined){r[e]=t}else
+  │     if(Array.isArray(n)){if(Array.isArray(t)){r[e]=n.concat(t)}else{n.push(t)}}else{if(Array.isA
+  │     rray(t)){r[e]=[n].concat(t)}else{r[e]=[n,t]}}}}function
+  │     hr(t,r,n,e,i){if(e==null||ur(t,e)){return}else{t.push(e)}if(fr(e)){var a=ee(e,"name");var
+  │     o=e.value;if(e.multiple&&e.tagName==="SELECT"){o=M(e.querySelectorAll("option:che
+  │     ---ee---
+  │     function ee(e,t){return e.getAttribute&&e.getAttribute(t)}function o(e,t){return
+  │     e.hasAttribute&&(e.hasAttribute(t)||e.hasAttribute("data-"+t))}function te(e,t){return
+  │     ee(e,t)||ee(e,"data-"+t)}functio
+  │
+  │ tokens 520 in 126 out 24251 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:13:38 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Confirming the root cause:
+  │
+  │ - `hr()` reads the input's `name` via `ee(e, "name")` (getAttribute("name")).
+  │ - `cr(a, o, r)` only stores the value when `a != null` (name is non-null).
+  │
+  │ The hidden input in templates/index.html:72 is as follows:
+  │ ```html
+  │ <input type="hidden" id="journal-cursor" value="">
+  │ ```
+  │ Since there's **no `name` attribute**, `ee(e,"name")` returns `null`, and `cr(null, value,
+  │ values)` does nothing. In other words, htmx never sends `cursor` at all, even though
+  │ `hx-include="#journal-cursor"` is present.
+  │
+  │ Therefore, on every 5-second poll, `cursor` arrives as `""` at the server, and the router
+  │ executes `lines = 200 if cursor else 100` → 100 → fetches the latest 100 lines with no
+  │ `--after-cursor` → appends them to `#journal-log` via `hx-swap="beforeend"` → the entire recent
+  │ batch gets duplicated on every internal reload. This matches the user's report exactly.
+  │
+  │ Also, even if `name="cursor"` is added, there's one more thing to consider: the JS trim handling
+  │ (MAX_LINES=500) keeps the cursor from the last line — no problem.
+  │
+  │ Now, are there any other contributing factors or edge cases that should be included in the plan?
+  │
+  │ 1. **Main fix**: Add `name="cursor"` to the hidden input in templates/index.html. This is a
+  │ template-only change (no server restart needed).
+  │
+  │ 2. **Secondary considerations** (should they be included in the plan?):
+  │    - **Race condition**: A filter submission and a scheduled 5-second poll could race with the
+  │    same cursor → the same batch gets appended twice. The submit handler synchronously clears the
+  │    log, but an in-flight poll (hx get) that had already fetched a response with the old cursor
+  │    could arrive after the new batch has been appended, and duplicate lines. htmx doesn't
+  │    automatically cancel in-flight requests… Actually, does htmx cancel the previous request for
+  │    the same element when a new one starts? No — htmx doesn't cancel in-flight requests by
+  │    default; both responses will be swapped. This can cause sporadic duplicates on filter chang
+  │ … [3308 more chars]
+  │
+  │ bash python3 - <<'EOF' src = open('static/vendor/htmx.min.js').read() for name in…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "python3 - <<'EOF'\nsrc = open('static/vendor/htmx.min.js').read()\nfor name in
+  │       ['function fr(', 'function ur(', 'function me(', 'function oe(']:\n    i =
+  │       src.find(name)\n    print(name, '->', src[i:i+220].split('function ')[1][:200])\n
+  │       print('---')\nEOF"
+  │     }
+  │   out
+  │     function fr( ->
+  │     fr(e){if(e.name===""||e.name==null||e.disabled||v(e,"fieldset[disabled]")){return
+  │     false}if(e.type==="button"||e.type==="submit"||e.tagName==="image"||e.tagName==="reset"||e.t
+  │     agName==="file"){return fa
+  │     ---
+  │     function ur( -> ur(e,t){for(var r=0;r<e.length;r++){var n=e[r];if(n.isSameNode(t)){return
+  │     true}}return false}
+  │     ---
+  │     function me( -> me(e,t){var r=ne(e,t);if(r){if(r==="this"){return[xe(e,t)]}else{var
+  │     n=Z(e,r);if(n.length===0){b('The selector "'+r+'" on '+t+" returned no
+  │     matches!");return[pe]}else{return n}}}}
+  │     ---
+  │     function oe( -> oe(e,t){if(e){for(var r=0;r<e.length;r++){t(e[r])}}}
+  │     ---
+  │
+  │ tokens 212 in 1463 out 24897 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:14:17 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Definitively confirmed: `fr(e)` returns `false` when `e.name === "" || e.name === null` —
+  │ meaning that in htmx 1.9.12, an input without a `name` attribute is completely skipped. The
+  │ hidden input `<input type="hidden" id="journal-cursor" value="">` at templates/index.html:72 has
+  │ no `name`, so even though it's referenced by `hx-include`, the `cursor` parameter is **never
+  │ sent**.
+  │
+  │ Result: every 5-second poll reaches `/api/journal` with `cursor=""` → `lines = 100` → no
+  │ `--after-cursor` → the latest 100 entries get returned → `hx-swap="beforeend"` appends all of
+  │ them again. Every internal reload duplicates the entire recent batch. Exactly the reported bug.
+  │
+  │ Fix: add `name="cursor"` to the hidden input. Template-only change, no server restart needed
+  │ (per AGENTS.md, templates are auto-reloaded).
+  │
+  │ Now, should I also verify there are no other issues? Let me re-examine the full flow after the
+  │ fix, including the trim logic:
+  │
+  │ - DOM capped at 500 lines (MAX_LINES), cursor read from last line → `--after-cursor` only
+  │ fetches entries newer than the last displayed one. Correct, no duplicates.
+  │ - Filter submit: clears the log + resets cursor → fresh 100-line fetch. Correct.
+  │ - Race condition (optional): while an in-flight poll has already received a response (fetched
+  │ with cursor C1), the user submits a filter → log cleared → new batch appended → stale response
+  │ arrives and gets appended → duplication. Rare, transient. Optional hardening: dedupe in
+  │ `htmx:afterSwap` using the existing `data-cursor` attributes — drop incoming `.jline`s whose
+  │ cursor already exists in the DOM. But watch the ordering: appended lines come at the end, and
+  │ the dedupe set should be built from the lines that existed before the swap. Since the swap
+  │ appends after the existing lines, we can: capture the set of existing cursors before... but in
+  │ afterSwap it's after the swap. Hmm — can we distinguish "old" from "new"? Does htmx add the
+  │ `htmx-added` class to appended elements? `addedClass: "htmx-added"` — yes, htmx adds
+  │ … [2123 more chars]
+  │
+  │ I've confirmed the root cause. Let me verify one more edge case — stale cursor behavior after a
+  │ reboot:
+  │
+  │ bash journalctl --no-pager -n 1 -o export 2>&1 | head -3; echo "rc=$?"; echo ---;…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "journalctl --no-pager -n 1 -o export 2>&1 | head -3; echo \"rc=$?\"; echo ---;
+  │       sudo journalctl --no-pager -o export -n 2
+  │       --after-cursor=\"s=00000000000000000000000000000000;i=1000;b=00000000-0000-0000-0000-00000
+  │       0000000;m=0;t=0;x=0\" 2>&1 | head -5; echo \"rc=$?\""
+  │     }
+  │   out
+  │     __CURSOR=s=661e4453b30f48c98a757a56bbb10e5c;i=3c141;b=31722cade7ee4be4a1dc50856789b79f;m=826
+  │     1f4e4b;t=65a46d27c1db4;x=94c96920fa202514
+  │     __REALTIME_TIMESTAMP=1788110085823924
+  │     __MONOTONIC_TIMESTAMP=34999324235
+  │     rc=0
+  │     ---
+  │     __CURSOR=s=661e4453b30f48c98a757a56bbb10e5c;i=7d1;b=3a191a6554ca45a18ad0ea2f53d8a9ec;m=17545
+  │     59;t=6589f9412469c;x=c54d7e3e308b37f0
+  │     __REALTIME_TIMESTAMP=1786292267533980
+  │     __MONOTONIC_TIMESTAMP=24462681
+  │     __SEQNUM=2001
+  │     __SEQNUM_ID=661e4453b30f48c98a757a56bbb10e5c
+  │     rc=0
+  │
+  │ tokens 226 in 1213 out 26571 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:14:50 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ Interesting — even with a completely fake/stale cursor (different boot id, seqnum 0), journalctl
+  │ didn't error out. It just returned entries (the first 2 entries after the cursor — which, since
+  │ the cursor is extremely old, turned out to be the oldest entries). So a stale cursor after a
+  │ reboot doesn't hard-fail. It either returns entries from after that point (potentially
+  │ re-appending old content once), or returns nothing. Either way it self-recovers. Good — no need
+  │ to handle reboots in the plan.
+  │
+  │ Alright, I'm confident in the analysis:
+  │
+  │ **Root cause**: `templates/index.html:72` — `<input type="hidden" id="journal-cursor" value="">`
+  │ has no `name` attribute. In htmx 1.9.12 (vendored), `fr()` skips inputs with `name == null`, so
+  │ `hx-include="#journal-cursor"` sends nothing. Every 5-second poll reaches the server with
+  │ `cursor=""`, and `/api/journal` always returns the most recent 100 lines, which
+  │ `hx-swap="beforeend"` appends again → the entire batch gets duplicated on every internal reload.
+  │
+  │ **Fix**: Add `name="cursor"` to the hidden input. One-line change to the template, no restart
+  │ needed (templates auto-reload).
+  │
+  │ **Verification**: Restart is not required, but to observe the polling I can curl the endpoint
+  │ with and without a cursor:
+  │ - `curl -s "http://127.0.0.1:8501/api/journal"` → 100 lines
+  │ - Grab the last data-cursor, then `curl -s "http://127.0.0.1:8501/api/journal?cursor=<c>"` →
+  │ only newer lines (0 if the system is quiet)
+  │
+  │ The browser-level check (no duplicates appearing in the UI over ~10–15 seconds) is the real
+  │ verification.
+  │
+  │ **Optional hardening** (present to user as a choice):
+  │ 1. Client-side dedup in `htmx:afterSwap`: discard incoming `.jline.htmx-added` entries whose
+  │ `data-cursor` already exists in the DOM. This defends against race conditions (filter submit vs.
+  │ in-flight poll).
+  │ 2. Server-side: not really needed.
+  │
+  │ Let me write up the plan concisely. Plan mode says I should present a well-formed plan. Keep it
+  │ concise. Ask whether they want the dedup hardening,
+  │ … [800 more chars]
+  │
+  │ Root cause found. Here's the analysis:
+  │
+  │ ## Root cause
+  │
+  │ `templates/index.html:72` — the hidden cursor input has **no `name` attribute**:
+  │
+  │ ```html
+  │ <input type="hidden" id="journal-cursor" value="">
+  │ ```
+  │
+  │ I verified in the vendored htmx 1.9.12 (`static/vendor/htmx.min.js`): its input-collection guard
+  │ `fr()` returns false for any input where `e.name == null`, so `hx-include="#journal-cursor"`
+  │ silently sends **nothing**. The `cursor` param therefore always arrives empty at
+  │ `app/routers/journal.py:18`.
+  │
+  │ Consequences, every 5 s poll:
+  │ - `app/routers/journal.py:23` → `lines = 200 if cursor else 100` → always the "no cursor" path
+  │ (100 lines, no `--after-cursor`)
+  │ - `journal.tail()` (`app/journal.py:76`) re-fetches the latest 100 entries
+  │ - `hx-swap="beforeend"` (`index.html:73`) appends the whole batch again
+  │
+  │ So the JS cursor tracking in `static/js/app.js:148` works fine client-side, but the value never
+  │ reaches the server — exactly the "appends the entire buffer on internal reload" symptom.
+  │
+  │ ## Plan
+  │
+  │ 1. **Fix (1 line, template-only, no server restart needed):** add `name="cursor"` to the hidden
+  │ input at `templates/index.html:72`.
+  │ 2. **Verify:**
+  │    - `curl -s http://127.0.0.1:8501/api/journal` → ~100 lines; grab the last `data-cursor`
+  │    - `curl -s "http://127.0.0.1:8501/api/journal?cursor=<c>"` → only entries newer than that (0
+  │    on a quiet system)
+  │    - Watch the Journal tab in a browser for ~15 s: no repeated batches
+  │    - `uv run python -m compileall -q app` (no Python changes expected, sanity only)
+  │
+  │ I also checked the reboot/stale-cursor edge case: `journalctl --after-cursor` with an old
+  │ boot-id cursor doesn't error (tested), so no extra handling needed.
+  │
+  │ One optional hardening: a rare race remains — submitting the filter form while a 5 s poll is in
+  │ flight can append a stale response after the fresh batch. A ~6-line dedup in the
+  │ `htmx:afterSwap` handler (drop incoming `.jline` whose `data-cursor` already exists in the DOM)
+  │ would cover it.
+  │
+  │ question Asked 1 question                                                            ok    86.6s
+  │   in
+  │     {
+  │       "questions": [
+  │         {
+  │           "question": "Fix scope: just the one-line root-cause fix, or also add the client-side
+  │           dedup guard against the filter-submit/poll race?",
+  │           "header": "Fix scope",
+  │           "options": [
+  │             {
+  │               "label": "One-line fix only (Recommended)",
+  │               "description": "Add name=\"cursor\" to the hidden input. Fixes the reported bug
+  │               with minimal change."
+  │             },
+  │             {
+  │               "label": "Fix + dedup guard",
+  │               "description": "Also dedup incoming lines by data-cursor in app.js to guard
+  │               against the rare in-flight-poll race when filters change."
+  │             }
+  │           ]
+  │         }
+  │       ]
+  │     }
+  │   out User has answered your questions: "Fix scope: just the one-line root-cause fix, or also
+  │   add the client-side dedup guard against the filter-submit/poll race?"="One-line fix only
+  │   (Recommended)". You can now continue with the user's answers in mind.
+  │
+  │ tokens 372 in 1429 out 28011 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:16:54 • assistant • Qwen3.8-27B-Think @plan
+  │
+  │ The user chose a one-line fix only. Since plan mode is still active, I should present the final
+  │ plan (execution is not yet possible). Actually — the user answered the question about the scope
+  │ of the fix. In plan mode, the next step is usually for the user to approve/switch to execution.
+  │ I should concisely present the final plan and wait for the go-ahead. Keep it short.
+  │
+  │ Final plan (awaiting your go-ahead to execute):
+  │
+  │ 1. `templates/index.html:72` — change to `<input type="hidden" id="journal-cursor" name="cursor"
+  │ value="">`
+  │ 2. Verify:
+  │    - `curl -s http://127.0.0.1:8501/api/journal` → note the last `data-cursor`
+  │    - `curl -s "http://127.0.0.1:8501/api/journal?cursor=<that-cursor>"` → expect only newer
+  │    entries (empty on a quiet system)
+  │    - `uv run python -m compileall -q app` (sanity; no Python changes)
+  │
+  │ No restart needed — templates auto-reload. Say the word and I'll apply it.
+  │
+  │ tokens 70 in 260 out 29813 cached 0 written $0.0000 stop
+
+
+  │ 2026-08-30 19:17:07 • user
+  │
+  │ go
+
+
+  │ 2026-08-30 19:17:07 • assistant • Qwen3.8-27B-Think
+  │
+  │ Let's apply a one-line fix. First, we need to read the file (already read). Let's edit line 72
+  │ of index.html.
+  │
+  │ edit /home/mac/Code/dashboard/templates/index.html                                   ok     0.0s
+  │   in
+  │     {
+  │       "filePath": "/home/mac/Code/dashboard/templates/index.html",
+  │       "oldString": "<input type=\"hidden\" id=\"journal-cursor\" value=\"\">",
+  │       "newString": "<input type=\"hidden\" id=\"journal-cursor\" name=\"cursor\" value=\"\">"
+  │     }
+  │   out Edit applied successfully.
+  │
+  │ tokens 21025 in 120 out 8906 cached 0 written $0.0000 tool-calls
+  │
+  │ patch 1 file(s) 739a2226
+
+
+  │ 2026-08-30 19:17:43 • assistant • Qwen3.8-27B-Think
+  │
+  │ Alright, let's verify. First, I'll check whether the server is running, then I'll access the
+  │ endpoint with curl.
+  │
+  │ Now verifying. Check server is up and test the cursor flow:
+  │
+  │ bash curl -s -o /dev/null -w "%{http_code}\n" http://127.0.0.1:8501/api/journal      ok     0.0s
+  │   in
+  │     {
+  │       "command": "curl -s -o /dev/null -w \"%{http_code}\\n\" http://127.0.0.1:8501/api/journal"
+  │     }
+  │   out 200
+  │
+  │ tokens 20 in 104 out 30050 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:17:46 • assistant • Qwen3.8-27B-Think
+  │
+  │ The server is running. Next, I'll simulate the polling flow: fetch the journal without a cursor,
+  │ extract the last data-cursor, then fetch with that cursor attached and verify that only newer
+  │ entries (or none at all) are returned.
+  │
+  │ bash C=$(curl -s "http://127.0.0.1:8501/api/journal" | grep -o 'data-cursor="[^"]…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "C=$(curl -s \"http://127.0.0.1:8501/api/journal\" | grep -o
+  │       'data-cursor=\"[^\"]*\"' | tail -1 | sed 's/data-cursor=\"//; s/\"$//')\necho
+  │       \"cursor_len=${#C}\"\nN1=$(curl -s \"http://127.0.0.1:8501/api/journal\" | grep -c
+  │       'class=\"jline')\nsleep 6\nN2=$(curl -s \"http://127.0.0.1:8501/api/journal?cursor=$C\" |
+  │       grep -c 'class=\"jline')\necho \"no-cursor lines=$N1  after-cursor new lines=$N2\"",
+  │       "timeout": 30000
+  │     }
+  │   out
+  │     cursor_len=124
+  │     no-cursor lines=100  after-cursor new lines=9
+  │
+  │ tokens 19 in 263 out 30173 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:17:59 • assistant • Qwen3.8-27B-Think
+  │
+  │ The cursor mechanism is working:
+  │ - Without cursor: 100 lines (latest batch).
+  │ - With cursor (after 6 seconds): only 9 new lines — entries that occurred after the cursor
+  │ point. This is exactly the expected behavior: instead of re-appending all 100 lines, only new
+  │ lines are appended.
+  │
+  │ Additionally, I'll also verify idempotency: re-fetching with the same cursor returns 0 (no
+  │ duplicates). Also confirm that the hidden input currently has a name, and that the page is being
+  │ served with it (template auto-reload). Let's fetch the index page and verify that the rendered
+  │ HTML contains name="cursor".
+  │
+  │ The cursor flow is now working correctly — the second poll returns only 9 new lines instead of
+  │ the full 100-line batch. Let's verify idempotency (that re-polling with the same cursor doesn't
+  │ add duplicates) and confirm that the template has been auto-reloaded in the served page:
+  │
+  │ bash C=$(curl -s "http://127.0.0.1:8501/api/journal" | grep -o 'data-cursor="[^"]…   ok     0.0s
+  │   in
+  │     {
+  │       "command": "C=$(curl -s \"http://127.0.0.1:8501/api/journal\" | grep -o
+  │       'data-cursor=\"[^\"]*\"' | tail -1 | sed 's/data-cursor=\"//; s/\"$//')\nN2=$(curl -s
+  │       \"http://127.0.0.1:8501/api/journal?cursor=$C\" | grep -c 'class=\"jline')\nN3=$(curl -s
+  │       \"http://127.0.0.1:8501/api/journal?cursor=$C\" | grep -c 'class=\"jline')\necho \"repeat
+  │       polls: $N2 $N3\"\ncurl -s http://127.0.0.1:8501/ | grep -o '<input type=\"hidden\"
+  │       id=\"journal-cursor\"[^>]*>'\ngrep -c Traceback /tmp/dash.log || true",
+  │       "timeout": 30000
+  │     }
+  │   out
+  │     repeat polls: 3 6
+  │     <input type="hidden" id="journal-cursor" name="cursor" value="">
+  │     0
+  │
+  │ tokens 39 in 455 out 30454 cached 0 written $0.0000 tool-calls
+
+
+  │ 2026-08-30 19:18:10 • assistant • Qwen3.8-27B-Think
+  │
+  │ Results:
+  │ - Repeated polling with the same cursor: 3 lines, then 6 lines — this means new entries are
+  │ arriving during the check (the system is active), and each polling returns only entries newer
+  │ than the cursor. No re-delivery of the batch (if it were duplication, we'd see 100 lines every
+  │ time).
+  │ - The served page now contains `name="cursor"` — template auto-reload is working.
+  │ - No traceback in the logs.
+  │
+  │ Done. Concise summary.
+  │
+  │ Fixed. `templates/index.html:72` now has `name="cursor"` on the hidden input, so htmx actually
+  │ sends the tracked cursor on each poll.
+  │
+  │ Verified against the running server (no restart needed):
+  │ - No cursor → 100 lines (initial batch, as before)
+  │ - With cursor → only 9 new lines after 6 s, and repeat polls return only entries newer than the
+  │ cursor (3, then 6 as new activity arrived) — no more full-batch repeats
+  │ - Served page contains the corrected input; no tracebacks in `/tmp/dash.log`
+  │
+  │ The Journal tab will now append only new lines on its 5 s internal reloads.
+  │
+  │ tokens 41 in 255 out 30949 cached 0 written $0.0000 stop
+
diff --git a/templates/index.html b/templates/index.html
index 107cb48..b35c258 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -69,7 +69,7 @@
       <button type="submit">filter</button>
     </form>
     <div id="journal-logwrap">
-      <input type="hidden" id="journal-cursor" value="">
+      <input type="hidden" id="journal-cursor" name="cursor" value="">
       <div id="journal-log" hx-get="/api/journal" hx-trigger="load, every 5s" hx-swap="beforeend" hx-include="#journal-filters, #journal-cursor"></div>
     </div>
   </section>