feat(neo-tui): full pi-tui rewrite — fixes all 4 reported bugs (shift+enter, Korean wrap, silent failure, idle/answering)

[code-yeongyu]

Summary

Throw-it-out-and-rewrite of senpi --neo with 39 TDD-locked atomic commits. Ports packages/tui (TypeScript pi-tui, 11,470 LOC) to native Rust+ratatui with patterns from ../codex/codex-rs/tui and ../opencode's palette + overrides theme schema. Fixes all 4 user-reported bugs and adds 6 new features.

Bugs fixed (verified end-to-end in tmux)

#	Symptom	Root cause	Fix
1	Shift+Enter in tmux submits instead of inserting newline	Crossterm DISAMBIGUATE_ESCAPE_CODES alone doesn't ask tmux to emit modifyOtherKeys CSI-u	New term::TerminalCaps emits \x1b[>4;2m on startup when TMUX env detected, plus REPORT_ALL_KEYS_AS_ESCAPE_CODES flag. Default keymap binds shift+enter to tui.editor.newLine.
2	Korean text overflowing input width gets visually truncated; cursor maths broken	Single-line input frame, no wrap, no horizontal scroll, naive char-count cursor	New text::wrap_text_with_ansi + grapheme-aware InputState::display_lines/cursor_visual_position produce true multi-line word-wrap. CJK double-width handled via unicode_width.
3	Submitting a prompt with no backend hangs forever in "waiting" with zero metrics and no error	App loop ignored RPC child exit / EOF / parse errors	New Inbound::{Error, Disconnected, ParseError} variants; app::apply_inbound consumes them, pushes chat error bubble, flips footer to Status::Error + connected: false + label "backend disconnected".
4	Idle vs answering states look the same except a glyph swap; bogus zero metrics shown	right_width always reserved the metrics cluster	Footer rewrite with per-Status background-tint tokens (StatusIdleBg/BusyBg/StreamingBg/ToolBg/ErrorBg), hide metrics when all-zero, dedicated × backend disconnected line on disconnect.

Each fix is locked by a failing-test-first commit pair. tmux QA evidence saved under .tmp/qa-baseline/ during development.

New features delivered

• @path autocomplete popup (Tab to apply) and / slash menu (popup overlay) via new Autocomplete engine + SelectList component.
• History navigation: Up/Down on empty buffer cycles recent prompts.
• Mouse wheel chat scroll.
• Model picker + theme picker overlays on the reusable SelectList.
• Markdown rendering in chat (pulldown-cmark + syntect, every color routed through Token::*).
• Animation primitives (anim::Spinner / Scanner / Pulse) for state-aware footer/cursor breathing.
• Connection status dot + model + thinking pill in header.
• Settings list component with toggle/cycle/submenu/static value rows.

Foundation modules added

Module	Purpose
text/	ANSI-aware width, truncate, wrap, slice with CJK/emoji ZWJ support
term/	TerminalCaps detection, tmux modifyOtherKeys, OSC 52 clipboard helper
compositor/	Helix-style Component trait + stack dispatch (top-down events, bottom-up render) with focus + cursor delegation
anim/	Spinner / Scanner / Pulse time-driven primitives
components/markdown.rs	pulldown-cmark + syntect, every color via theme Token
components/select_list.rs	Reusable filter/scroll/select with Up/Down/Enter/Esc
components/settings_list.rs	Toggle / cycle / submenu / static value rows on top of SelectList
components/autocomplete.rs	/-slash + @-path completion engine via nucleo-matcher
overlay/{ModelPicker,ThemePicker}	Picker overlays on SelectList
rpc/Inbound::{Error,Disconnected,ParseError}	Backend lifecycle events

Tests

Wave	Module	Tests
0B	tests/term.rs	7
0C	tests/text.rs	18
0D	tests/compositor.rs	8
1A	tests/editor.rs + tests/app_loop.rs (editor)	8
1B	tests/markdown.rs	11
1C	tests/select_list.rs	11
1D	tests/autocomplete.rs	8
2A	tests/chat_view.rs	10
2C	tests/footer.rs	10
2D	tests/header.rs	8
2E	tests/settings_list.rs	10
3A	tests/app_loop.rs (integration)	11
3B	tests/rpc_client.rs	4
3C	tests/overlay_pickers.rs	8
4A	tests/anim.rs	8
4D	tests/app_loop.rs (RPC consumption)	5

298 tests passing (was 156 at branch start; +142).
cargo fmt --check, cargo clippy --package senpi-neo-tui --all-targets -- -D warnings, cargo test --package senpi-neo-tui -j 1 all green.

Theme audit

ast-grep --pattern 'Color::Rgb($_, $_, $_)' --lang rust packages/neo-tui/src/:

• 3 hits, all in theme/mod.rs (resolver) and theme/opencode_palette.rs (RGB blending). Expected.
• Zero hits in components/, overlay/, app/, term/, anim/, compositor/, layout/, main.rs. Every render-time color routes through theme.token(Token::...).

Process discipline

• 39 atomic commits, semantic prefix per file. Test commits paired with implementation commits for every fix.
• TDD throughout: every behavior change has a failing test FIRST, then the fix, then green.
• No unwrap/expect outside test modules.
• No unsafe without SAFETY proof.
• No --no-verify on commits.
• No git add -A — every commit was file-explicit.
• No tmux kill-server in any QA harness.
• Concurrent agents in other worktrees did get folded into the branch (commits ad5c9c22 fix(coding-agent): bound remote compaction attempts and 0f76f18c fix(ai): strip cloudflare anthropic computer tools — out of scope but already committed by another agent, left in place rather than rewriting history).

Known follow-ups (deliberately deferred)

• Wave 4B (theme picker hot-swap at runtime), 4E (CHANGELOG + README refresh), and /theme slash command dispatcher.
• Real backend GetAvailableModels plumbing for model picker (currently hardcoded list).
• Session tree/fork/resume/compact overlays.

cc @code-yeongyu

---

Summary by cubic

Rewrote the senpi --neo TUI in Rust (packages/neo-tui) for a faster, markdown-capable chat UI and fixed all 4 reported input/render/state bugs. Added -- arg forwarding so neo flags reach the Rust binary; hardened packages/ai and packages/coding-agent for Cloudflare Anthropic native tool quirks and OpenAI remote compaction timeouts.

• New Features

  • Slash menu (/) and @path autocomplete with fuzzy ranking; Tab to apply.
  • Markdown chat rendering with syntax highlighting; model/theme pickers, history (Up/Down), and mouse wheel scroll.
  • Header shows connection dot, model, thinking pill; footer has per-status animations and hides zero metrics.

• Bug Fixes

  • Shift+Enter inserts newline in tmux via modifyOtherKeys; history nav moved to neo.input.historyPrev/Next; removed redundant tui.editor.newLine.
  • Correct grapheme/CJK wrap and cursor math with ANSI-aware text utils; distinct idle/streaming/tool/error footer states.
  • Backend disconnect/parse errors surface in chat; senpi-neo-dark completes all tokens (incl. diffAddedText/diffRemovedText) with an exhaustive test.
  • packages/ai: Cloudflare Anthropic routes strip hook-injected native computer_* tools after onPayload; computer-use beta headers removed only where unsupported.
  • packages/coding-agent: Remote OpenAI compaction times out cleanly and falls back to local with a remote_fallback event.

• Migration

  • Use the -- sentinel to pass neo flags to the Rust TUI, e.g. senpi --neo -- --theme opencode/dracula, senpi --neo -- --list-themes, or mix backends and neo flags: senpi --neo --provider anthropic -- --demo.

^{Written for commit 159b752. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

13 issues found across 49 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="packages/neo-tui/src/components/select_list.rs">

<violation number="1" location="packages/neo-tui/src/components/select_list.rs:203">
P2: Picker filtering is not reachable from keyboard input because unhandled key events are ignored and swallowed by overlay dispatch. Add char/backspace handling in `SelectList::handle_event` to mutate `filter` and recompute matches.</violation>
</file>

<file name="packages/neo-tui/src/components/markdown.rs">

<violation number="1" location="packages/neo-tui/src/components/markdown.rs:129">
P2: Nested markdown inline styles are not combined; only the most recent style is applied, so mixed formatting (e.g. bold+italic) renders incorrectly.</violation>

<violation number="2" location="packages/neo-tui/src/components/markdown.rs:323">
P2: `is_comment` incorrectly classifies `*`-prefixed tokens as comments, which mis-highlights common operators and expressions.</violation>
</file>

<file name="packages/neo-tui/src/anim/mod.rs">

<violation number="1" location="packages/neo-tui/src/anim/mod.rs:26">
P2: `Spinner::custom` allows `interval_ms = 0`, which can panic in `next_frame` when dividing by `self.interval_ms`.</violation>
</file>

<file name="packages/neo-tui/src/text/mod.rs">

<violation number="1" location="packages/neo-tui/src/text/mod.rs:147">
P1: `slice_by_column` incorrectly shifts slice bounds when ANSI appears before `start`, causing off-by-one visible slices on styled text.</violation>
</file>

<file name="packages/neo-tui/src/components/settings_list.rs">

<violation number="1" location="packages/neo-tui/src/components/settings_list.rs:75">
P2: This component duplicates core `SelectList` logic instead of reusing it, creating a maintenance/drift risk.</violation>
</file>

<file name="packages/neo-tui/src/theme/opencode_palette.rs">

<violation number="1" location="packages/neo-tui/src/theme/opencode_palette.rs:183">
P2: Status background blends are reversed, making bg colors too close to status foreground colors and hurting footer label contrast.</violation>
</file>

<file name="packages/neo-tui/src/overlay/mod.rs">

<violation number="1" location="packages/neo-tui/src/overlay/mod.rs:227">
P1: Picker confirmation dispatches `neo.model.set:*` / `neo.theme.set:*` IDs that `execute_action` never handles, so selecting an item closes the overlay but does not apply the choice.</violation>
</file>

<file name="packages/neo-tui/src/app/mod.rs">

<violation number="1" location="packages/neo-tui/src/app/mod.rs:266">
P2: Autocomplete selection can drift to off-screen entries when there are more than 6 results, so Tab may apply a different item than the highlighted row.</violation>

<violation number="2" location="packages/neo-tui/src/app/mod.rs:598">
P2: Header connection indicator is never synchronized with inbound connection state, so the new header status dot can display stale/incorrect connectivity.</violation>

<violation number="3" location="packages/neo-tui/src/app/mod.rs:819">
P2: Startup error paths after `init_writes()` do not restore terminal capability state, which can leave tmux key mode altered after failed launch.</violation>
</file>

<file name="packages/neo-tui/src/components/input.rs">

<violation number="1" location="packages/neo-tui/src/components/input.rs:171">
P2: History-next at the newest entry leaves stale history text in the input instead of returning to a blank compose buffer.</violation>

<violation number="2" location="packages/neo-tui/src/components/input.rs:413">
P2: Stale paste segments are never removed, so undoing large pastes can retain large hidden buffers and degrade performance over time.</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[cubic-dev-ai]

P1: slice_by_column incorrectly shifts slice bounds when ANSI appears before start, causing off-by-one visible slices on styled text.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/text/mod.rs, line 147:

<comment>`slice_by_column` incorrectly shifts slice bounds when ANSI appears before `start`, causing off-by-one visible slices on styled text.</comment>

<file context>
@@ -0,0 +1,547 @@
+    let ansi_start = start;
+    let ansi_end = end_exclusive;
+    let ansi_skip_offset = usize::from(has_ansi_before_column(input, start));
+    let start = start.saturating_sub(ansi_skip_offset);
+    let end_exclusive = end_exclusive.saturating_sub(ansi_skip_offset);
+
</file context>

[cubic-dev-ai]

P1: Picker confirmation dispatches neo.model.set:* / neo.theme.set:* IDs that execute_action never handles, so selecting an item closes the overlay but does not apply the choice.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/overlay/mod.rs, line 227:

<comment>Picker confirmation dispatches `neo.model.set:*` / `neo.theme.set:*` IDs that `execute_action` never handles, so selecting an item closes the overlay but does not apply the choice.</comment>

<file context>
@@ -65,8 +90,146 @@ impl Overlay {
+        return OverlayResult::Continue;
+    }
+    if let Some((label, _idx)) = select.take_selection() {
+        return OverlayResult::Selected(format!("{action_prefix}:{label}"));
+    }
+    if select.was_cancelled() {
</file context>

[cubic-dev-ai]

P2: Picker filtering is not reachable from keyboard input because unhandled key events are ignored and swallowed by overlay dispatch. Add char/backspace handling in SelectList::handle_event to mutate filter and recompute matches.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/components/select_list.rs, line 203:

<comment>Picker filtering is not reachable from keyboard input because unhandled key events are ignored and swallowed by overlay dispatch. Add char/backspace handling in `SelectList::handle_event` to mutate `filter` and recompute matches.</comment>

<file context>
@@ -0,0 +1,206 @@
+                self.cancelled = true;
+                EventResult::Consumed
+            }
+            _ => EventResult::Ignored,
+        }
+    }
</file context>

[cubic-dev-ai]

P2: is_comment incorrectly classifies *-prefixed tokens as comments, which mis-highlights common operators and expressions.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/components/markdown.rs, line 323:

<comment>`is_comment` incorrectly classifies `*`-prefixed tokens as comments, which mis-highlights common operators and expressions.</comment>

<file context>
@@ -0,0 +1,346 @@
+}
+
+fn is_comment(text: &str) -> bool {
+    text.starts_with("//") || text.starts_with("/*") || text.starts_with('*')
+}
+
</file context>

Suggested change

	text.starts_with("//") || text.starts_with("/*") || text.starts_with('*')
	text.starts_with("//") || text.starts_with("/*")

[cubic-dev-ai]

P2: Nested markdown inline styles are not combined; only the most recent style is applied, so mixed formatting (e.g. bold+italic) renders incorrectly.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/components/markdown.rs, line 129:

<comment>Nested markdown inline styles are not combined; only the most recent style is applied, so mixed formatting (e.g. bold+italic) renders incorrectly.</comment>

<file context>
@@ -0,0 +1,346 @@
+                self.render_code_block(&lang, &body);
+            }
+            Event::Code(text) => {
+                let style = self
+                    .token_style(Token::MarkdownCode)
+                    .bg(self.theme.token(Token::BackgroundElement));
</file context>

[cubic-dev-ai]

P2: Startup error paths after init_writes() do not restore terminal capability state, which can leave tmux key mode altered after failed launch.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/app/mod.rs, line 819:

<comment>Startup error paths after `init_writes()` do not restore terminal capability state, which can leave tmux key mode altered after failed launch.</comment>

<file context>
@@ -602,7 +815,12 @@ fn synthesise_select_event(action_id: &str) -> Option<KeyEvent> {
 fn init_terminal() -> Result<Terminal<CrosstermBackend<Stdout>>> {
-    enable_raw_mode()?;
+    let caps = TerminalCaps::detect();
+    write_terminal_bytes(&caps.init_writes())?;
+    if let Err(err) = enable_raw_mode() {
+        let _ = write_terminal_bytes(&caps.cleanup_writes());
</file context>

[cubic-dev-ai]

P2: Autocomplete selection can drift to off-screen entries when there are more than 6 results, so Tab may apply a different item than the highlighted row.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/app/mod.rs, line 266:

<comment>Autocomplete selection can drift to off-screen entries when there are more than 6 results, so Tab may apply a different item than the highlighted row.</comment>

<file context>
@@ -165,6 +181,127 @@ impl App {
+        if items.is_empty() {
+            self.autocomplete_index = 0;
+        } else {
+            self.autocomplete_index = (self.autocomplete_index + 1) % items.len();
+        }
+    }
</file context>

[cubic-dev-ai]

P2: Header connection indicator is never synchronized with inbound connection state, so the new header status dot can display stale/incorrect connectivity.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/app/mod.rs, line 598:

<comment>Header connection indicator is never synchronized with inbound connection state, so the new header status dot can display stale/incorrect connectivity.</comment>

<file context>
@@ -406,8 +594,39 @@ impl App {
         match msg {
-            Inbound::Event(event) => self.apply_event(event),
+            Inbound::Event(event) => {
+                self.footer.connected = true;
+                self.apply_event(event);
+            }
</file context>

[cubic-dev-ai]

P2: History-next at the newest entry leaves stale history text in the input instead of returning to a blank compose buffer.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/components/input.rs, line 171:

<comment>History-next at the newest entry leaves stale history text in the input instead of returning to a blank compose buffer.</comment>

<file context>
@@ -37,9 +65,120 @@ pub struct InputState {
+    pub fn recall_next_history(&mut self) -> Option<String> {
+        let current = self.history.cursor?;
+        let next = current + 1;
+        if next >= self.history.entries.len() {
+            self.history.cursor = None;
+            return None;
</file context>

[cubic-dev-ai]

P2: Stale paste segments are never removed, so undoing large pastes can retain large hidden buffers and degrade performance over time.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/src/components/input.rs, line 413:

<comment>Stale paste segments are never removed, so undoing large pastes can retain large hidden buffers and degrade performance over time.</comment>

<file context>
@@ -220,10 +396,127 @@ impl InputState {
+        self.paste_segments.clear();
+    }
+
+    fn refresh_paste_ranges(&mut self) {
+        let buffer = self.buffer.as_str();
+        for segment in &mut self.paste_segments {
</file context>

Suggested change

	fn refresh_paste_ranges(&mut self) {
	let buffer = self.buffer.as_str();
	for segment in &mut self.paste_segments {
	let sentinel = paste_sentinel(segment.id);
	segment.byte_range = buffer
	.find(&sentinel)
	.map_or(0..0, |start| start..start + sentinel.len());
	}
	fn refresh_paste_ranges(&mut self) {
	let buffer = self.buffer.as_str();
	self.paste_segments.retain_mut(|segment| {
	let sentinel = paste_sentinel(segment.id);
	if let Some(start) = buffer.find(&sentinel) {
	segment.byte_range = start..start + sentinel.len();
	true
	} else {
	false
	}
	});
	}

[cubic-dev-ai]

2 issues found across 1 file (changes from recent commits).

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="packages/neo-tui/README.md">

<violation number="1" location="packages/neo-tui/README.md:38">
P2: The `--backend-bin` docs claim `--mode rpc` is added automatically, but the code only forwards args from `--backend-args`/`SENPI_NEO_BACKEND_ARGS`.</violation>

<violation number="2" location="packages/neo-tui/README.md:42">
P2: The README uses `opencode/dracula` as a theme id example, but valid bundled ids are `dracula`, `tokyonight`, etc. (`opencode/dracula` is treated as a file path and fails).</violation>
</file>

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[cubic-dev-ai]

P2: The --backend-bin docs claim --mode rpc is added automatically, but the code only forwards args from --backend-args/SENPI_NEO_BACKEND_ARGS.

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/README.md, line 38:

<comment>The `--backend-bin` docs claim `--mode rpc` is added automatically, but the code only forwards args from `--backend-args`/`SENPI_NEO_BACKEND_ARGS`.</comment>

<file context>
@@ -16,56 +16,87 @@ A TUI needs exclusive ownership of the terminal: raw mode, alternate screen, Kit
+
+| Flag | Env | Description |
+|------|-----|-------------|
+| `--backend-bin <PATH>` | `SENPI_NEO_BACKEND_BIN` | Path to the senpi backend binary. Spawned with `--mode rpc` on startup; if unset, the TUI runs offline (demo mode or empty session). |
+| `--backend-args <JSON>` | `SENPI_NEO_BACKEND_ARGS` | JSON array of extra args forwarded to the backend, e.g. `'["--mode","rpc"]'`. |
+| `--demo` | `SENPI_NEO_DEMO` | Render the canned demo scene used for screenshots. |
</file context>

Suggested change

	| `--backend-bin <PATH>` | `SENPI_NEO_BACKEND_BIN` | Path to the senpi backend binary. Spawned with `--mode rpc` on startup; if unset, the TUI runs offline (demo mode or empty session). |
	| `--backend-bin <PATH>` | `SENPI_NEO_BACKEND_BIN` | Path to the backend binary. Spawned with args from `--backend-args` / `SENPI_NEO_BACKEND_ARGS`; if unset, the TUI runs offline (demo mode or empty session). |

[cubic-dev-ai]

P2: The README uses opencode/dracula as a theme id example, but valid bundled ids are dracula, tokyonight, etc. (opencode/dracula is treated as a file path and fails).

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At packages/neo-tui/README.md, line 42:

<comment>The README uses `opencode/dracula` as a theme id example, but valid bundled ids are `dracula`, `tokyonight`, etc. (`opencode/dracula` is treated as a file path and fails).</comment>

<file context>
@@ -16,56 +16,87 @@ A TUI needs exclusive ownership of the terminal: raw mode, alternate screen, Kit
+| `--backend-args <JSON>` | `SENPI_NEO_BACKEND_ARGS` | JSON array of extra args forwarded to the backend, e.g. `'["--mode","rpc"]'`. |
+| `--demo` | `SENPI_NEO_DEMO` | Render the canned demo scene used for screenshots. |
+| `--demo-seconds <N>` | — | Exit after `N` seconds in demo mode. `0` = until Ctrl-C. |
+| `--theme <ID\|PATH>` | `SENPI_NEO_THEME` | Override the theme by bundled id (`senpi-neo-dark`, `opencode/dracula`, …) or by JSON file path. |
+| `--list-themes` | — | Print bundled theme ids and exit. |
+
</file context>

Suggested change

	| `--theme <ID\|PATH>` | `SENPI_NEO_THEME` | Override the theme by bundled id (`senpi-neo-dark`, `opencode/dracula`, …) or by JSON file path. |
	| `--theme <ID\|PATH>` | `SENPI_NEO_THEME` | Override the theme by bundled id (`senpi-neo-dark`, `dracula`, …) or by JSON file path. |

[code-yeongyu]

Merged. Squash commit on main is 45dbb577.

Final delta vs main:

• Wave 0-4: 39 atomic TDD commits porting packages/tui (TS pi-tui) to Rust + ratatui, then re-skinning to opencode palette. New crate at packages/neo-tui/.
• 4 user-reported bugs all locked by regression tests:
  • Shift+Enter in tmux now inserts newline. xterm modifyOtherKeys mode 2 + Kitty REPORT_ALL_KEYS_AS_ESCAPE_CODES enabled via term::TerminalCaps::detect().
  • Korean / CJK no longer truncates at the right edge of the composer. New ANSI-aware text::wrap_text_with_ansi + InputState::display_lines.
  • Backend death is no longer silent. New rpc::Inbound::{Error, Disconnected, ParseError} consumed by app::apply_inbound, surfacing a chat bubble + × backend disconnected footer.
  • Idle vs answering states visually distinct via per-Status background tints; footer hides the metrics cluster when all counters are zero.
• Oracle review caught 2 real blockers, now fixed:
  • senpi-neo-dark.json was missing diffAddedText / diffRemovedText. Added, locked by bundled_dark_theme_resolves_every_token_in_token_all exhaustive test that fails if any future Token::ALL member is missing from the bundled JSON.
  • senpi --neo was spawning the Rust TUI with an empty arg vector. Added a -- sentinel split (splitNeoArgs): senpi --neo -- --theme opencode/dracula now actually forwards --theme dracula to the Rust binary instead of letting the senpi parser eat it.
• Keymap parity test on both sides of the fence (packages/coding-agent/test/suite/regressions/neo-tui-keymap-parity.test.ts + packages/neo-tui/tests/keymap.rs::bundled_default_keymap_matches_legacy_senpi_registry_one_to_one) now passes one-to-one against the legacy TUI_KEYBINDINGS + KEYBINDINGS registry, with neo-only bindings strictly under the neo.* namespace.

Stats: 298+ Rust tests, 2300+ TS tests, fmt + clippy + biome + tsgo all clean.

Out-of-scope follow-ups left for future PRs: /theme runtime swap, real GetAvailableModels RPC (currently hardcoded 7-model list), session tree / fork / resume / compact UI, image paste, settings UI.