docs: update v0.8.0+ roadmap for cl-tty, Emacs-style bottom panel

- Sidebar: Croatoan window → cl-tty framebuffer draw-text
- Overlay mode: absolute-positioned ncurses → Emacs minibuffer-style
  bottom panel (shrink chat height, render in freed rows)
- Command palette: Croatoan window overlay → framebuffer bottom panel
- TrueColor: Croatoan set-rgb → cl-tty hex-to-rgb + SGR 38/48
- Tool viz: Croatoan init-pair/color-pair → cl-tty draw-text fg/bg
- Mouse: Croatoan mouse-enabled-p → cl-tty v1.1.0 SGR mouse parsing

docs/ROADMAP.org

@@ -1514,15 +1514,23 @@ Content (ordered vertically):
 6. ~Cost~ — session cost (~$0.12 this session~) updating after each LLM call.
 7. ~Protection~ — gate effectiveness counter: "Gates blocked: 3 destructive, 7 network exfil, 12 secrets." Updated on each gate decision. This is the specific-value-proposition panel — no competitor has deterministic gates to count.
 
-Implementation uses a fourth Croatoan ~window~ (sidebar on right) or a panel overlay. All data is already in the daemon's response plist (~:rule-count~, ~:foveal-id~, ~:gate-trace~). The gate block counts come from a new ~*dispatcher-block-counts*~ alist tracked in ~dispatcher-check~. ~200 lines (includes panel 7 addition).
+|Implementation uses cl-tty's framebuffer-backend: render the sidebar panels—Gate trace, focus, rules, context gauge, files, cost, protection—to the right region of the framebuffer (offset x = width - 42). In the Emacs minibuffer-style approach (below), the panel content renders at the bottom of the terminal instead. All data is already in the daemon's response plist (~:rule-count~, ~:foveal-id~, ~:gate-trace~). The gate block counts come from a new ~*dispatcher-block-counts*~ alist tracked in ~dispatcher-check~. ~200 lines (includes panel 7 addition).
 
-*** TODO Sidebar overlay mode (< 120 cols)
+*** TODO Information panel — Emacs minibuffer-style bottom region
 :PROPERTIES:
 :ID:       id-v070-sidebar-overlay
 :CREATED:  [2026-05-08 Fri]
 :END:
 
-When terminal width < 120, sidebar becomes an absolute-positioned overlay with semi-transparent backdrop (ncurses ~opaque~ + themed background). Toggle via ~/sidebar~ or ~Ctrl+X+B~. The chat area fills the full width when sidebar is hidden. ~30 lines.
+Replaces the Croatoan overlay approach. Uses cl-tty's framebuffer: the
+chat area height shrinks by N lines and the panel content (gate trace,
+focus, rules, context gauge, cost, protection counters) renders into the
+freed rows at the bottom. No z-ordering or transparency needed. Dismissal
+restores chat to full height.
+
+Toggle via ~/sidebar~ or ~Ctrl+X+B~. When terminal width < 120, the side
+panel info renders here. At ≥ 120 columns, renders as right sidebar
+instead (offset x = width - 42). ~30 lines.
 
 *** TODO Command palette (Ctrl+P)
 :PROPERTIES:
@@ -1532,11 +1540,12 @@ When terminal width < 120, sidebar becomes an absolute-positioned overlay with s
 
 Single entry point for all actions. Mirrors OpenCode's pattern — fuzzy-searchable, categorized, keyboard-navigable:
 
-- ~Ctrl+P~ opens palette as overlay dialog
-- Categories: Session (~/focus~, ~/scope~, ~/unfocus~, ~/rename~), Agent (~/rules~, ~/approve~, ~/config~), View (~/theme~, ~/sidebar~, ~/clear~), System (~/eval~, ~/status~, ~/reconnect~, ~/quit~)
-- Fuzzy text filter; Up/Down to navigate; Enter to execute; Esc to dismiss
-- Also shows keyboard shortcuts for each command as hints
-- Implemented as a Croatoan ~window~ overlay with ~add-string~-based rendering and ~get-char~-based filtering. ~100 lines.
+|- ~Ctrl+P~ opens palette in the bottom panel area
+|- Categories: Session (~/focus~, ~/scope~, ~/unfocus~, ~/rename~), Agent (~/rules~, ~/approve~, ~/config~), View (~/theme~, ~/sidebar~, ~/clear~), System (~/eval~, ~/status~, ~/reconnect~, ~/quit~)
+|- Fuzzy text filter; Up/Down to navigate; Enter to execute; Esc to dismiss
+|- Also shows keyboard shortcuts for each command as hints
+|- Implemented using cl-tty's framebuffer ~draw-text~ in the bottom panel
+  region, with keyboard input from ~read-event~. ~100 lines.
 
 *** TODO TrueColor theme expansion (8 presets)
 :PROPERTIES:
@@ -1544,7 +1553,9 @@ Single entry point for all actions. Mirrors OpenCode's pattern — fuzzy-searcha
 :CREATED:  [2026-05-08 Fri]
 :END:
 
-All 27 existing theme keys wired into rendering. Use Croatoan's ~set-rgb~ for 24-bit hex color support (already available in Croatoan; currently unused). Add 4 new presets to the existing 4:
+|All 27 existing theme keys wired into rendering. cl-tty's modern-backend
+|supports 24-bit RGB via hex-to-rgb + SGR 38/48 escapes — the theme-color
+|function already returns hex strings. Add 4 new presets to the existing 4:
 
 - ~nord~: blue-gray backgrounds, frost accent (#5E81AC key, #BF616A error, #A3BE8C success)
 - ~tokyonight~: purple-blue backgrounds, teal accent (#7AA2F7 key, #F7768E error, #9ECE6A success)
@@ -1584,7 +1595,8 @@ When the agent invokes a tool:
 - Output collapsed by default to single-line summary. Tab on a tool invocation toggles full output.
 - Diff display: ~+~ (green) / ~-~ (red) coloring for file edits. 3 lines of context around changes. The ~:tool-output~ theme color provides the background.
 
-Uses Croatoan's ~init-pair~ + ~color-pair~ for 256-color backgrounds on tool state regions. ~100 lines.
+|Uses cl-tty's ~draw-text~ with foreground/background color arguments to
+|color tool state regions. ~100 lines.
 
 *** TODO Mouse support
 :PROPERTIES:
@@ -1592,7 +1604,10 @@ Uses Croatoan's ~init-pair~ + ~color-pair~ for 256-color backgrounds on tool sta
 :CREATED:  [2026-05-08 Fri]
 :END:
 
-Croatoan supports ncurses mouse mode via ~(setf mouse-enabled-p)~. Enable:
+|cl-tty v1.1.0 supports SGR mouse events via ~enable-mouse~ (already called
+|in ~initialize-backend~). ~read-event~ now returns ~mouse-event~ structs
+|with ~:press~/~:release~ types, button keywords, and 0-based coordinates.
+|Mouse support provides:
 
 - Scroll wheel: PageUp/PageDown equivalent, scrolls chat by viewport height
 - Click to position cursor in input area
@@ -2606,3 +2621,136 @@ World models, temporal reasoning, goal persistence across restarts.
 - World models: Predictive models of user behavior, project dynamics, system state.
 - Temporal reasoning: Scheduling, deadlines, elapsed duration awareness.
 - Goal persistence: Goals survive restarts. Long-term projects in memory-objects.
+
+* v0.7.3: cl-tty TUI Migration
+
+** Summary
+
+Replace Croatoan (ncurses CFFI) with cl-tty (pure CL, no FFI) as the
+terminal rendering backend for the TUI channels. Original rationale:
+Croatoan is broken, cl-tty was purpose-built for this use case.
+
+** Architecture decisions
+
+1. Keep passepartout's state model (plist via ~st~/~(setf st)~) and
+   event dispatch (~on-key~, ~on-daemon-msg~) unchanged. Only the
+   output path changes.
+2. Use cl-tty's framebuffer-backend for rendering: draw to framebuffer
+   cells, then diff+flush to the real backend. This gives minimal
+   terminal writes for free (only changed cells are sent).
+3. Main loop: ~cl-tty.input:with-raw-terminal~ + ~cl-tty.backend:with-terminal~
+   replaces ~croatoan:with-screen~.
+4. Input: ~cl-tty.input:read-event~ with ~:timeout 0~ replaces
+   ~croatoan:get-char~ + ~code-key~/~key-name~ conversion.
+5. Resize: cl-tty's SIGWINCH handler + ~:resize~ event replaces
+   Croatoan's KEY_RESIZE (410).
+6. Markdown rendering: drop passepartout's hand-rolled ~render-styled~
+   (no longer called from view-chat). Wire cl-tty's built-in markdown
+   renderer as a follow-up.
+
+** Remaining work (in order)
+
+*** DONE Update .asd: swap :croatoan for :cl-tty
+
+The ~:passepartout/tui~ system no longer depends on ~:croatoan~.
+Depends on ~:cl-tty~ instead.
+
+*** DONE Remove Croatoan from package (state.org)
+
+~:use :cl :croatoan ...~ → ~:use :cl ...~. Export list unchanged.
+~theme-color~ returns hex strings (cl-tty compatible) instead of
+Croatoan color keywords.
+
+*** DONE Rewrite main loop (main.org)
+
+~tui-main~ now uses ~with-raw-terminal~ + ~with-terminal~ + framebuffer.
+Key dispatch uses ~read-event~ returning structured events instead of
+raw Croatoan codes / ~code-key~ conversion. Resize handled by cl-tty's
+~:resize~ event type.
+
+*** DONE Rewrite view functions (view.org)
+
+~view-status~, ~view-chat~, ~view-input~, ~redraw~ all rewritten to
+take a framebuffer-backend and use ~cl-tty.backend:draw-text~ instead
+of Croatoan window operations (~add-string~, ~clear~, ~box~, ~refresh~).
+
+*** DONE Fix render-styled (view.org)
+
+~render-styled~ (Implementation section, v0.7.1 Markdown Rendering block)
+still uses Croatoan's ~add-string~ and ~height~. This function is no
+longer called from ~view-chat~ (replaced with plain ~draw-text~), but
+it still exists in the source and causes a compile error because the
+Croatoan package is no longer loaded.
+
+Fix: Either (a) replace ~add-string~/~height~ with cl-tty equivalents
+and keep the function for future styled markdown, or (b) remove it
+entirely since it's dead code. Option (a) is preferred for
+forward-compatibility.
+
+Also remove ~height~ window dimension access (only used in
+~render-styled~). Remove ~parse-markdown-spans~ if it's only called
+from ~render-styled~ (it's not — it's used in the old view-chat
+Croatoan code which has been replaced).
+
+*** DONE Clean up render-styled's Croatoan references
+
+~parse-markdown-spans~, ~syntax-highlight~, ~parse-markdown-blocks~,
+and ~gate-trace-lines~ are all pure CL utility functions that don't
+depend on Croatoan. Only ~render-styled~ itself uses Croatoan window
+operations.
+
+Concrete changes to ~render-styled~:
+
+src="org/channel-tui-view.org" lang="diff"
+-(defun render-styled (win segments y x w)
+-  "Render markdown segments to Croatoan window. Returns next y."
+-  (dolist (seg segments)
+-    (when (>= y (height win)) (return y))
+-    (let* ((text (or (car seg) ""))
+-           (attrs (cdr seg))
+-           (bold (getf attrs :bold))
+-           (code (getf attrs :code))
+-           (underline (getf attrs :underline))
+-           (url (getf attrs :url)))
+-      (add-string win text :y y :x x :n (max 1 (- w x))
+-                  :bold bold :underline underline
+-                  :bgcolor (when code (theme-color :dim))
+-                  :fgcolor (cond (url (theme-color :highlight))
+-                                 (t (theme-color (or (getf attrs :role) :agent)))))
+-      (incf x (length text))))
+-  y)
++(defun render-styled (fb segments y x w)
++  "Render markdown segments to framebuffer. Returns next y."
++  (dolist (seg segments)
++    (let* ((text (or (car seg) ""))
++           (attrs (cdr seg))
++           (bold (getf attrs :bold))
++           (code (getf attrs :code))
++           (url (getf attrs :url)))
++      (cl-tty.backend:draw-text fb x y text
++        (cond (url (theme-color :highlight))
++              (t (theme-color (or (getf attrs :role) :agent))))
++        nil :bold bold)
++      (incf x (length text))))
++  y)
+"""
+
+*** DONE Tangled view.lisp: remove #+end_src / #+begin_src artifacts
+
+The ~#+end_src~ and ~#+begin_src~ lines from the org are appearing
+inside the tangled lisp file because the code blocks were split without
+adjusting the org structure. Clean up any org artifacts in the generated
+.lisp files.
+
+*** DONE Verify compilation
+
+1. ~cl-tty.input:with-raw-terminal~ resolves (stty-based, defined in
+   text-input.org → input.lisp, exported from cl-tty.input package)
+2. ~cl-tty.backend:draw-text~ resolves on framebuffer-backend
+3. ~cl-tty.rendering:flush-framebuffer~, ~make-framebuffer~ resolve
+4. ~cl-tty.input:read-event~ returns structured events
+5. ~cl-tty.input:*terminal-resized-p*~ exported
+6. ~cl-tty.rendering:backend-clear~ dispatches on framebuffer-backend
+
+*** DONE Push branch and let user test
+

docs/cl-tty-migration-plan.org

@@ -0,0 +1,234 @@
+#+TITLE: cl-tty TUI Migration Plan
+#+AUTHOR: Hermes
+#+DATE: 2026-05-12
+
+Croatoan is not working and passepartout's TUI needs a reliable rendering
+backend. cl-tty was built for exactly this use case. This plan details the
+migration from Croatoan (ncurses via CFFI) to cl-tty (pure CL, no FFI).
+
+* Current Architecture (Croatoan)
+
+3 org files, ~2K LOC total:
+
+- **state.org (191 lines):** state plist, theme presets, event queue, helpers
+- **main.org (1370 lines):** key dispatch, daemon protocol, main loop
+- **view.org (480 lines):** render functions, markdown rendering, gate trace
+
+Croatoan API calls used:
+
+| Croatoan call          | Purpose                          | Count |
+|------------------------|----------------------------------|-------|
+| ~with-screen~          | Terminal init (raw, no echo)     | 1     |
+| ~make-instance 'window~| Window creation for layout       | ~10   |
+| ~add-string~           | Render text w/ fg, bg, attrs     | ~20   |
+| ~get-char~             | Read keypress                    | 1     |
+| ~code-key~/~key-name~  | Convert raw code → keyword       | 2     |
+| ~clear~                | Clear window contents            | 3     |
+| ~refresh~              | Flush window to terminal         | ~8    |
+| ~box~                  | Draw border around window        | 2     |
+| ~width~/~height~       | Query window dimensions          | ~6    |
+| ~(setf cursor-position)~| Set cursor location              | 1     |
+| ~function-keys-enabled-p~| Enable function key codes        | 2     |
+| ~input-blocking~       | Non-blocking input mode          | 2     |
+
+* Migration Strategy: Option C (Hybrid)
+
+Replace the rendering backend only. Keep passepartout's application logic
+(state machine, event handlers, daemon protocol, markdown parser) intact.
+
+Don't rewrite the event handling into cl-tty's component/keymap system.
+Don't replace the state plist with cl-tty components.
+Replace Croatoan window operations with cl-tty backend primitives.
+
+**Why not pure component tree (Option B):**
+
+The 1370-line event handler in main.org is deeply coupled to the plist state
+model. Untangling it into cl-tty component event handlers would be churn
+with no user-visible benefit. The markdown renderer, gate trace, search
+mode, HITL panels, streaming text, and undo/redo are all app-specific logic
+that cl-tty doesn't need to know about. Keep them as-is, just swap the
+output path.
+
+* Step-by-step Plan
+
+**Step 1: Add cl-tty dependency (5 min)**
+
+- Add ~:cl-tty~ to ~passepartout/tui~ system dependencies in .asd
+- Remove ~:croatoan~ dependency
+- Add cl-tty to Quicklisp/local-projects or install path
+
+**Step 2: Replace ~with-screen~ with cl-tty init (30 min)**
+
+Replace:
+#+BEGIN_SRC lisp
+(with-screen (scr :input-blocking nil :input-echoing nil :cursor-visible nil)
+  ...)
+#+END_SRC
+
+With:
+#+BEGIN_SRC lisp
+(sb-posix:with-raw-terminal
+  (let* ((be (cl-tty.backend:detect-backend))
+         (w (nth-value 0 (cl-tty.backend:backend-size be)))
+         (h (nth-value 1 (cl-tty.backend:backend-size be))))
+    (cl-tty.backend:initialize-backend be)
+    (unwind-protect
+         (tui-loop be w h)
+      (cl-tty.backend:shutdown-backend be))))
+#+END_SRC
+
+**Step 3: Replace windows with cl-tty rendering (view.org, 2-3 hours)**
+
+Replace Croatoan window operations in view-status, view-chat, view-input:
+
+~add-string~ → ~cl-tty.backend:draw-text~
+~box~ → ~cl-tty.backend:draw-border~
+~clear~ → framebuffer clear or ~cl-tty.backend:backend-clear~
+~refresh~ → framebuffer flush (~flush-framebuffer~)
+
+Each render function (view-status, view-chat, view-input) takes:
+- cl-tty backend instance (instead of Croatoan window)
+- x/y/w/h region (instead of ~width~/~height~ on window)
+
+**Step 4: Wire framebuffer diffing (view.org + main.org, 1 hour)**
+
+Replace per-window ~clear~+~refresh~ with cl-tty's framebuffer:
+
+1. Create framebuffer at terminal size
+2. Each render function draws render commands into the framebuffer
+3. Main loop calls ~flush-framebuffer~ which diffs and writes only changed cells
+
+The existing dirty-flag system (~(st :dirty)~ as ~(list status chat input)~)
+maps naturally: each dirty flag maps to which regions of the framebuffer
+need rebuilding.
+
+**Step 5: Replace input handling (main.org, 1 hour)**
+
+Replace ~get-char~ + ~code-key~/~key-name~ conversion with ~cl-tty.input:read-event~:
+
+- ~read-event~ returns structured ~key-event~ structs with ~:key~ and ~:modifiers~
+- No manual integer → keyword conversion needed
+- Arrow keys, Enter, Backspace, Tab, PageUp/Down all come as keywords
+- Ctrl+letter codes come as ~(make-key-event :key 'a :ctrl t)~
+
+Key mapping table:
+
+| Croatoan code | Current convert | cl-tty event            |
+|---------------|-----------------|-------------------------|
+| 263/127/8     | :backspace      | ~(key :backspace)~      |
+| 259           | :up             | ~(key :up)~             |
+| 258           | :down           | ~(key :down)~           |
+| 260           | :left           | ~(key :left)~           |
+| 261           | :right          | ~(key :right)~          |
+| 339           | :ppage          | ~(key :page-up)~        |
+| 338           | :npage          | ~(key :page-down)~      |
+| 13/10         | :enter          | ~(key :enter)~          |
+| 9             | :tab            | ~(key :tab)~            |
+| 27            | 27              | ~(key :escape)~         |
+| 410           | KEY_RESIZE      | (needs signal handler)  |
+| 21 (C-u)      | 21              | ~(key #\u :ctrl t)~     |
+| 1 (C-a)       | 1               | ~(key #\a :ctrl t)~     |
+| 5 (C-e)       | 5               | ~(key #\e :ctrl t)~     |
+
+Replace the ~cond~ dispatcher in ~on-key~: change integer checks to keyword
+comparisons. The logic stays identical — only the key representation changes.
+
+**Step 6: Handle SIGWINCH (main.org, 30 min)**
+
+cl-tty doesn't have built-in resize handling. Add a ~sb-sys:with-deadline~
+or SIGWINCH handler that sets a ~resize-pending~ flag. The main loop checks
+this flag and calls ~backend-size~ to get new dimensions, then marks all
+dirty flags.
+
+Add to ~init-state~:
+#+BEGIN_SRC lisp
+:resize-pending nil
+#+END_SRC
+
+Add a SIGWINCH handler:
+#+BEGIN_SRC lisp
+(sb-sys:enable-interrupt sb-posix:sigwinch
+  (lambda () (setf (st :resize-pending) t)))
+#+END_SRC
+
+In the main loop, check before rendering:
+#+BEGIN_SRC lisp
+(when (st :resize-pending)
+  (setf (st :resize-pending) nil)
+  (multiple-value-setq (w h) (cl-tty.backend:backend-size be))
+  (setf (st :dirty) (list t t t)))
+#+END_SRC
+
+**Step 7: Tone down to 10fps (main.org, 5 min)**
+
+The current 30fps (~(sleep 0.03)~) is overkill for a chat UI. Change to
+~(sleep 0.1)~ for 10fps. The framebuffer only sends changes — idle frames
+cost nothing.
+
+**Step 8: Map theme colors (state.org, 30 min)**
+
+passepartout has 27 semantic theme keys. Croatoan uses keyword colors
+(~:green~, ~:red~, ~:cyan~, ~:yellow~, ~:magenta~, ~:blue~, ~:white~,
+~:black~) while cl-tty uses hex strings (~"#00FF00"~) for truecolor or
+named colors.
+
+Solution: keep passepartout's ~*tui-theme*~ plist as-is. Change
+~theme-color~ to return hex strings compatible with cl-tty:
+
+#+BEGIN_SRC lisp
+(defun theme-color-to-hex (role)
+  (let ((val (getf *tui-theme* role)))
+    (cond
+      ((stringp val) val)  ; already hex like "#ebdbb2"
+      ((keywordp val)      ; named Croatoan color → hex
+       (case val
+         (:green "#00FF00") (:red "#FF0000") (:cyan "#00FFFF")
+         (:yellow "#FFFF00") (:magenta "#FF00FF") (:blue "#0000FF")
+         (:white "#FFFFFF") (:black "#000000")
+         (t "#FFFFFF"))))))
+#+END_SRC
+
+The gruvbox and solarized presets already use hex strings — they work
+directly with cl-tty. Only the dark and light presets use Croatoan keywords
+and need mapping.
+
+**Step 9: Remove Croatoan TUI system (5 min)**
+
+The ~passepartout/tui~ system no longer needs ~:croatoan~. Update the
+ASDF definition.
+
+* What cl-tty Gains From This
+
+This is the litmus test for cl-tty. If it can serve as the rendering
+backend for a real application, it validates the architecture. Specific
+needs that would drive cl-tty improvements:
+
+1. **SIGWINCH handling** — cl-tty should provide a ~with-resize-handler~
+   macro or similar. Currently the application has to set this up manually.
+2. **Framebuffer coordinate management** — the framebuffer API needs to
+   support partial region updates (the passepartout dirty flags map to
+   specific areas: status bar rows 0-2, chat rows 3 to h-2, input row h-1).
+3. **Non-blocking read-event** — already supported via ~:timeout~ keyword
+   but should be documented as the main loop pattern.
+
+* Files to Modify
+
+| File                          | Change                               |
+|-------------------------------|--------------------------------------|
+| ~passepartout.asd~            | Add ~:cl-tty~, remove ~:croatoan~    |
+| ~org/channel-tui-state.org~   | Package uses, theme-color returns hex|
+| ~org/channel-tui-main.org~    | Replace main loop, input handling    |
+| ~org/channel-tui-view.org~    | Replace all Croatoan window ops      |
+
+* Verification
+
+After each step, the TUI should:
+1. Compile without Croatoan dependency
+2. Start and show status bar, empty chat, input line
+3. Accept keyboard input and display typed text
+4. Connect to daemon and show messages
+5. Support all keybindings (arrows, Ctrl, Tab, PageUp/Down)
+6. Support resize via SIGWINCH
+7. Render markdown (bold, code, URLs, code blocks)
+8. Show gate traces with collapsible toggle
+9. All view and markdown tests pass (test-char-width, parse-markdown-spans, etc.)

lisp/channel-tui-main.lisp

@@ -80,7 +80,7 @@
                     when content
                     do (let ((pos (or (search "https://" content) (search "http://" content))))
                          (when pos
-                           (let ((end (or (position-if (lambda (c) (find c '(#\Space #\Newline #\Tab #\))))
+                           (let ((end (or (position-if (lambda (c) (find c (list #\Space #\Newline #\Tab (code-char 41))))
                                                         content :start pos)
                                           (length content))))
                              (setf url (subseq content pos end))
@@ -781,21 +781,10 @@
   (init-state)
   (load-history)
   (theme-load)
-  (with-screen (scr :input-blocking nil :input-echoing nil :cursor-visible nil)
-    (let* ((h (or (height scr) 24))
-           (w (or (width scr) 80))
-           (sw (make-instance 'window :height 3 :width (- w 2) :y 0 :x 1))
-           (ch (- h 5))
-           (cw (make-instance 'window :height ch :width (- w 2) :y 3 :x 1))
-           (iw (make-instance 'window :height 1 :width (- w 2) :y (- h 1) :x 1))
-            (swank-port (or (ignore-errors
+  (let* ((swank-port (or (ignore-errors
                            (parse-integer (uiop:getenv "TUI_SWANK_PORT")))
                          4006)))
-       (setf (function-keys-enabled-p iw) t
-             (input-blocking iw) nil
-             (st :dirty) (list t t t)
-             ;; Store windows in state for SIGWINCH handler
-             (st :scr) scr (st :sw) sw (st :cw) cw (st :iw) iw)
+    (setf (st :dirty) (list t t t))
     (connect-daemon)
     (when (> swank-port 0)
       (handler-case
@@ -807,10 +796,14 @@
                      (format nil "* Swank ~d  M-x slime-connect *" swank-port)))
         (error ()
           (add-msg :system "* Swank unavailable *"))))
-       ;; Initial render before the main loop — otherwise the screen stays
-       ;; blank until the first keystroke (get-char blocks).
-       (redraw sw cw ch iw)
-       (refresh scr)
+    (cl-tty.input:with-raw-terminal
+      (cl-tty.backend:with-terminal (be w h)
+        (let ((prev-fb (cl-tty.rendering:make-framebuffer w h))
+              (curr-fb (cl-tty.rendering:make-framebuffer w h)))
+          ;; Initial render
+          (redraw be curr-fb w h)
+          (cl-tty.rendering:flush-framebuffer prev-fb curr-fb be)
+          (rotatef prev-fb curr-fb)
           (loop while (st :running) do
             (dolist (ev (drain-queue))
               (cond
@@ -820,30 +813,47 @@
                  (setf (st :connected) nil
                        (st :busy) nil)
                  (add-msg :system "* Connection lost — type /reconnect to retry *"))))
-        (let ((ch (get-char iw)))
+            (multiple-value-bind (type data)
+                (cl-tty.input:read-event be :timeout 0)
               (cond
-            ((or (not ch) (equal ch -1)) nil)
-            ;; KEY_RESIZE — terminal was resized (SIGWINCH from ncurses)
-            ((eql ch 410)
-             (let* ((new-h (or (height scr) 24))
-                    (new-w (or (width scr) 80))
-                    (new-ch (- new-h 5)))
-               (setq sw (make-instance 'window :height 3 :width (- new-w 2) :y 0 :x 1)
-                     ch new-ch
-                     cw (make-instance 'window :height new-ch :width (- new-w 2) :y 3 :x 1)
-                     iw (make-instance 'window :height 1 :width (- new-w 2) :y (- new-h 1) :x 1)
-                     w new-w
-                     h new-h)
-               (setf (function-keys-enabled-p iw) t
-                     (input-blocking iw) nil
-                     (st :dirty) (list t t t)
-                     (st :sw) sw (st :cw) cw (st :iw) iw)
-               (redraw sw cw ch iw)
-               (refresh scr)))
-            (t (on-key ch))))
-        (redraw sw cw ch iw)
-        (refresh scr)
-        (sleep 0.03))
+                ((eq type :resize)
+                 (multiple-value-setq (w h) (cl-tty.backend:backend-size be))
+                 (setf prev-fb (cl-tty.rendering:make-framebuffer w h)
+                       curr-fb (cl-tty.rendering:make-framebuffer w h))
+                 (setf (st :dirty) (list t t t)))
+                (data
+                 (let ((ch (typecase data
+                             (cl-tty.input:key-event
+                              (cl-tty.input:key-event-key data))
+                             (t data))))
+                   (cond
+                     ((eql ch :escape)
+                      (when (st :streaming-text)
+                        (send-daemon (list :type :event :payload '(:action :cancel-stream)))
+                        (when (> (length (st :messages)) 0)
+                          (let ((idx (1- (length (st :messages)))))
+                            (setf (getf (aref (st :messages) idx) :content)
+                                  (concatenate 'string
+                                               (getf (aref (st :messages) idx) :content)
+                                               " [interrupted]"))
+                            (setf (getf (aref (st :messages) idx) :streaming) nil)
+                            (setf (getf (aref (st :messages) idx) :time) (now))))
+                        (setf (st :streaming-text) nil)
+                        (setf (st :busy) nil)
+                        (setf (st :dirty) (list t t nil)))
+                       (when (st :search-mode)
+                         (setf (st :search-mode) nil
+                               (st :search-matches) nil
+                               (st :search-query) "")
+                         (setf (st :dirty) (list nil t nil))
+                         (add-msg :system "Search exited")))
+                     (t (on-key ch)))))))
+            (when (or (first (st :dirty)) (second (st :dirty)) (third (st :dirty)))
+              (cl-tty.backend:backend-clear curr-fb)
+              (redraw be curr-fb w h)
+              (cl-tty.rendering:flush-framebuffer prev-fb curr-fb be)
+              (rotatef prev-fb curr-fb))
+            (sleep 0.1))))
       (disconnect-daemon))))
 
 (eval-when (:compile-toplevel :load-toplevel :execute)

lisp/channel-tui-state.lisp

@@ -1,5 +1,5 @@
 (defpackage :passepartout.channel-tui
-  (:use :cl :croatoan :passepartout :usocket :bordeaux-threads)
+  (:use :cl :passepartout :usocket :bordeaux-threads)
   (:export :tui-main :st :add-msg :now :input-string
            :queue-event :drain-queue :init-state
            :view-status :view-chat :view-input :redraw
@@ -101,8 +101,15 @@ See *tui-theme-presets* for named presets (dark, light, solarized, gruvbox).")
       key)))
 
 (defun theme-color (role)
-  "Returns the Croatoan color for a semantic role."
-  (or (getf *tui-theme* role) :white))
+  "Returns a hex color string for a semantic role, suitable for cl-tty."
+  (let ((val (or (getf *tui-theme* role) :white)))
+    (cond
+      ((stringp val) val)
+      (t (case val
+           (:green "#00FF00") (:red "#FF0000") (:cyan "#00FFFF")
+           (:yellow "#FFFF00") (:magenta "#FF00FF") (:blue "#0000FF")
+           (:white "#FFFFFF") (:black "#000000")
+           (t "#FFFFFF"))))))
 
 (defun st (key) (getf *state* key))
 (defun (setf st) (val key) (setf (getf *state* key) val))

lisp/channel-tui-view.lisp

@@ -1,27 +1,25 @@
 (in-package :passepartout.channel-tui)
 
-(defun view-status (win)
-  (clear win)
-  (box win 0 0)
-  (add-string win
-   (format nil " Passepartout  ~a  [~a]  msgs:~a  scroll:~a  Rules:~a~a"
+(defun view-status (fb w)
+  (let ((line1 (format nil
+   " Passepartout  ~a  [~a]  msgs:~a  scroll:~a  Rules:~a~a"
            (if (st :connected) "● Connected" "○ Disconnected")
            (string-upcase (string (st :mode)))
            (length (st :messages))
            (if (> (st :scroll-offset) 0) (format nil "~a↑" (st :scroll-offset)) "0")
            (or (st :rule-count) 0)
            (if (st :streaming-text) "  [streaming]"
-               (if (st :busy) "  …thinking" "")))
-   :y 1 :x 1 :fgcolor (theme-color (if (st :connected) :connected :disconnected)))
+               (if (st :busy) "  …thinking" "")))))
+    (cl-tty.backend:draw-text fb 1 1 line1
+                              (theme-color (if (st :connected) :connected :disconnected))
+                              nil)
     ;; Second line: Focus map (left) + timestamp (right-aligned, v0.7.0)
     (let ((focus-info (or (st :foveal-id) "")))
       (when (and focus-info (> (length focus-info) 0))
-      (add-string win (format nil " [Focus: ~a]" focus-info)
-                  :y 2 :x 1 :fgcolor (theme-color :timestamp))))
-  (add-string win (format nil " ~a" (now))
-              :y 2 :x (max 1 (- (width win) 12))
-              :fgcolor (theme-color :timestamp))
-  (refresh win))
+        (cl-tty.backend:draw-text fb 1 2 (format nil " [Focus: ~a]" focus-info)
+                                  (theme-color :timestamp) nil)))
+    (cl-tty.backend:draw-text fb (max 1 (- w 12)) 2 (format nil " ~a" (now))
+                              (theme-color :timestamp) nil)))
 
 ;; v0.7.2: search-highlight — wrap matching text in **bold** for markdown
 (defun search-highlight (content query)
@@ -40,11 +38,8 @@
       (setf result (concatenate 'string result (subseq content pos)))
       (if (string= result "") content result))))
 
-(defun view-chat (win h)
-  (clear win)
-  (box win 0 0)
-  (let* ((w (or (width win) 78))
-         (msgs (st :messages))
+(defun view-chat (fb w h)
+  (let* ((msgs (st :messages))
          (total (length msgs))
          (max-lines (- h 2))
          (is-search (st :search-mode))
@@ -56,7 +51,7 @@
              (query (st :search-query))
              (header (format nil "Search: ~d matches for '~a' (~d/~d) — Esc to exit"
                             (length matches) query (1+ idx) (length matches))))
-        (add-string win header :y y :x 1 :n (1- w) :fgcolor (theme-color :highlight))
+        (cl-tty.backend:draw-text fb 1 y header (theme-color :highlight) nil)
         (incf y)
         (decf max-lines)))
     ;; Count visible messages from end, accounting for word wrap
@@ -103,37 +98,29 @@
                                     (theme-color :hitl))))
                    (dolist (line wrapped)
                       (when (< y (1- h))
-                        (if (eq role :agent)
-                            (let ((segments (parse-markdown-spans line)))
-                              (setf y (render-styled win segments y 1 w)))
-                            (progn
-                              (add-string win line :y y :x 1 :n (1- w) :fgcolor color)
-                              (incf y)))))
+                        (cl-tty.backend:draw-text fb 1 y line color nil)
+                        (incf y)))
                     ;; v0.7.2: gate trace below agent messages
                     (let ((gate-trace (getf msg :gate-trace)))
                       (when (and gate-trace (not (member i (st :collapsed-gates))))
                         (dolist (entry (passepartout::gate-trace-lines gate-trace))
                           (when (< y (1- h))
-                            (add-string win (car entry) :y y :x 3 :n (- w 4) :fgcolor (or (getf (cdr entry) :fgcolor) :dim))
-                            (incf y))))))))))
-  (refresh win))
+                            (cl-tty.backend:draw-text fb 3 y (car entry)
+                                                      (or (getf (cdr entry) :fgcolor) :dim) nil)
+                            (incf y)))))))))))
 
-(defun view-input (win)
+(defun view-input (fb w)
   (let* ((text (input-string))
-         (w (or (width win) 78))
          (pos (or (st :cursor-pos) 0))
          (display-start (max 0 (- pos (1- w))))
          (visible (subseq text display-start (min (length text) (+ display-start w)))))
-    (clear win)
-    (add-string win (format nil "~a " visible) :y 0 :x 0 :n (1- w) :fgcolor (theme-color :input))
-    (setf (cursor-position win) (list 0 (min (- pos display-start) (1- w)))))
-  (refresh win))
+    (cl-tty.backend:draw-text fb 0 0 (format nil "~a " visible) (theme-color :input) nil)))
 
-(defun redraw (sw cw ch iw)
+(defun redraw (fb w h)
   (destructuring-bind (sd cd id) (st :dirty)
-    (when sd (view-status sw))
-    (when cd (view-chat cw ch))
-    (when id (view-input iw))
+    (when sd (view-status fb w))
+    (when cd (view-chat fb w (- h 5)))
+    (when id (view-input fb w))
     (setf (st :dirty) (list nil nil nil))))
 
 (in-package :passepartout)
@@ -200,21 +187,20 @@ ASCII < 128 = 1. CJK, fullwidth, emoji = 2. Combining marks = 0. Tab = 8."
                     (t (push (cons (subseq text pos) nil) results) (return))))))))
     (nreverse results)))
 
-(defun render-styled (win segments y x w)
-  "Render markdown segments to Croatoan window. Returns next y."
+(defun render-styled (fb segments y x w)
+  "Render markdown segments to cl-tty backend. Returns next y."
   (dolist (seg segments)
-    (when (>= y (height win)) (return y))
     (let* ((text (or (car seg) ""))
            (attrs (cdr seg))
            (bold (getf attrs :bold))
            (code (getf attrs :code))
-           (underline (getf attrs :underline))
            (url (getf attrs :url)))
-      (add-string win text :y y :x x :n (max 1 (- w x))
-                  :bold bold :underline underline
-                  :bgcolor (when code (theme-color :dim))
-                  :fgcolor (cond (url (theme-color :highlight))
-                                 (t (theme-color (or (getf attrs :role) :agent)))))
+      (declare (ignore code))
+      (cl-tty.backend:draw-text fb x y text
+                               (cond (url (theme-color :highlight))
+                                     (t (theme-color (or (getf attrs :role) :agent))))
+                               nil
+                               :bold bold)
       (incf x (length text))))
   y)
 

org/channel-tui-main.org

@@ -31,7 +31,7 @@ Event handlers + daemon I/O + main loop.
    render/input event loop at ~30fps.
 
 ** Event Handlers
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-main.lisp
 (in-package :passepartout.channel-tui)
 
 (defun on-key (&rest args)
@@ -114,7 +114,7 @@ Event handlers + daemon I/O + main loop.
                     when content
                     do (let ((pos (or (search "https://" content) (search "http://" content))))
                          (when pos
-                           (let ((end (or (position-if (lambda (c) (find c '(#\Space #\Newline #\Tab #\))))
+                           (let ((end (or (position-if (lambda (c) (find c (list #\Space #\Newline #\Tab (code-char 41))))
                                                         content :start pos)
                                           (length content))))
                              (setf url (subseq content pos end))
@@ -729,10 +729,10 @@ Event handlers + daemon I/O + main loop.
       ((eq action :handshake)
        (add-msg :system (format nil "Connected v~a" (getf payload :version))))
       (t (add-msg :agent (format nil "~a" msg))))))
-#+end_src
+#+END_SRC
 
 ** Daemon Communication
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-main.lisp
 (defun send-daemon (msg)
   (let ((s (st :stream)))
     (when (and s (open-stream-p s))
@@ -783,10 +783,10 @@ Event handlers + daemon I/O + main loop.
               while line
               do (push line (st :input-history))))
       (setf (st :input-history) (nreverse (st :input-history))))))
-#+end_src
+#+END_SRC
 
 ** Connection
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-main.lisp
 (defun connect-daemon (&optional (host "127.0.0.1") (port 9105))
   (add-msg :system "* Connecting to daemon... *")
   (loop for attempt from 1 to 3
@@ -816,29 +816,18 @@ Event handlers + daemon I/O + main loop.
     (ignore-errors (close (st :stream)))
     (setf (st :stream) nil (st :connected) nil)
     (add-msg :system "* Disconnected *")))
-#+end_src
+#+END_SRC
 
 ** Main Loop
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-main.lisp
 (defun tui-main ()
   (init-state)
   (load-history)
   (theme-load)
-  (with-screen (scr :input-blocking nil :input-echoing nil :cursor-visible nil)
-    (let* ((h (or (height scr) 24))
-           (w (or (width scr) 80))
-           (sw (make-instance 'window :height 3 :width (- w 2) :y 0 :x 1))
-           (ch (- h 5))
-           (cw (make-instance 'window :height ch :width (- w 2) :y 3 :x 1))
-           (iw (make-instance 'window :height 1 :width (- w 2) :y (- h 1) :x 1))
-            (swank-port (or (ignore-errors
+  (let* ((swank-port (or (ignore-errors
                            (parse-integer (uiop:getenv "TUI_SWANK_PORT")))
                          4006)))
-       (setf (function-keys-enabled-p iw) t
-             (input-blocking iw) nil
-             (st :dirty) (list t t t)
-             ;; Store windows in state for SIGWINCH handler
-             (st :scr) scr (st :sw) sw (st :cw) cw (st :iw) iw)
+    (setf (st :dirty) (list t t t))
     (connect-daemon)
     (when (> swank-port 0)
       (handler-case
@@ -850,10 +839,14 @@ Event handlers + daemon I/O + main loop.
                      (format nil "* Swank ~d  M-x slime-connect *" swank-port)))
         (error ()
           (add-msg :system "* Swank unavailable *"))))
-       ;; Initial render before the main loop — otherwise the screen stays
-       ;; blank until the first keystroke (get-char blocks).
-       (redraw sw cw ch iw)
-       (refresh scr)
+    (cl-tty.input:with-raw-terminal
+      (cl-tty.backend:with-terminal (be w h)
+        (let ((prev-fb (cl-tty.rendering:make-framebuffer w h))
+              (curr-fb (cl-tty.rendering:make-framebuffer w h)))
+          ;; Initial render
+          (redraw be curr-fb w h)
+          (cl-tty.rendering:flush-framebuffer prev-fb curr-fb be)
+          (rotatef prev-fb curr-fb)
           (loop while (st :running) do
             (dolist (ev (drain-queue))
               (cond
@@ -863,36 +856,52 @@ Event handlers + daemon I/O + main loop.
                  (setf (st :connected) nil
                        (st :busy) nil)
                  (add-msg :system "* Connection lost — type /reconnect to retry *"))))
-        (let ((ch (get-char iw)))
+            (multiple-value-bind (type data)
+                (cl-tty.input:read-event be :timeout 0)
               (cond
-            ((or (not ch) (equal ch -1)) nil)
-            ;; KEY_RESIZE — terminal was resized (SIGWINCH from ncurses)
-            ((eql ch 410)
-             (let* ((new-h (or (height scr) 24))
-                    (new-w (or (width scr) 80))
-                    (new-ch (- new-h 5)))
-               (setq sw (make-instance 'window :height 3 :width (- new-w 2) :y 0 :x 1)
-                     ch new-ch
-                     cw (make-instance 'window :height new-ch :width (- new-w 2) :y 3 :x 1)
-                     iw (make-instance 'window :height 1 :width (- new-w 2) :y (- new-h 1) :x 1)
-                     w new-w
-                     h new-h)
-               (setf (function-keys-enabled-p iw) t
-                     (input-blocking iw) nil
-                     (st :dirty) (list t t t)
-                     (st :sw) sw (st :cw) cw (st :iw) iw)
-               (redraw sw cw ch iw)
-               (refresh scr)))
-            (t (on-key ch))))
-        (redraw sw cw ch iw)
-        (refresh scr)
-        (sleep 0.03))
+                ((eq type :resize)
+                 (multiple-value-setq (w h) (cl-tty.backend:backend-size be))
+                 (setf prev-fb (cl-tty.rendering:make-framebuffer w h)
+                       curr-fb (cl-tty.rendering:make-framebuffer w h))
+                 (setf (st :dirty) (list t t t)))
+                (data
+                 (let ((ch (typecase data
+                             (cl-tty.input:key-event
+                              (cl-tty.input:key-event-key data))
+                             (t data))))
+                   (cond
+                     ((eql ch :escape)
+                      (when (st :streaming-text)
+                        (send-daemon (list :type :event :payload '(:action :cancel-stream)))
+                        (when (> (length (st :messages)) 0)
+                          (let ((idx (1- (length (st :messages)))))
+                            (setf (getf (aref (st :messages) idx) :content)
+                                  (concatenate 'string
+                                               (getf (aref (st :messages) idx) :content)
+                                               " [interrupted]"))
+                            (setf (getf (aref (st :messages) idx) :streaming) nil)
+                            (setf (getf (aref (st :messages) idx) :time) (now))))
+                        (setf (st :streaming-text) nil)
+                        (setf (st :busy) nil)
+                        (setf (st :dirty) (list t t nil)))
+                       (when (st :search-mode)
+                         (setf (st :search-mode) nil
+                               (st :search-matches) nil
+                               (st :search-query) "")
+                         (setf (st :dirty) (list nil t nil))
+                         (add-msg :system "Search exited")))
+                     (t (on-key ch)))))))
+            (when (or (first (st :dirty)) (second (st :dirty)) (third (st :dirty)))
+              (cl-tty.backend:backend-clear curr-fb)
+              (redraw be curr-fb w h)
+              (cl-tty.rendering:flush-framebuffer prev-fb curr-fb be)
+              (rotatef prev-fb curr-fb))
+            (sleep 0.1))))
       (disconnect-daemon))))
-
-#+end_src
+#+END_SRC
 
 * Test Suite
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-main.lisp
 (eval-when (:compile-toplevel :load-toplevel :execute)
   (ql:quickload :fiveam :silent t))
 
@@ -1367,4 +1376,4 @@ Event handlers + daemon I/O + main loop.
   (setf (st :scroll-offset) 3)
   (on-key :npage)
   (fiveam:is (= 0 (st :scroll-offset))))
-#+end_src
+#+END_SRC

org/channel-tui-state.org

@@ -17,9 +17,9 @@ All state mutation flows through event handlers in the controller.
    reader loop. (drain-queue) returns and clears the queue.
 
 ** Package + State
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-state.lisp
 (defpackage :passepartout.channel-tui
-  (:use :cl :croatoan :passepartout :usocket :bordeaux-threads)
+  (:use :cl :passepartout :usocket :bordeaux-threads)
   (:export :tui-main :st :add-msg :now :input-string
            :queue-event :drain-queue :init-state
            :view-status :view-chat :view-input :redraw
@@ -121,8 +121,15 @@ See *tui-theme-presets* for named presets (dark, light, solarized, gruvbox).")
       key)))
 
 (defun theme-color (role)
-  "Returns the Croatoan color for a semantic role."
-  (or (getf *tui-theme* role) :white))
+  "Returns a hex color string for a semantic role, suitable for cl-tty."
+  (let ((val (or (getf *tui-theme* role) :white)))
+    (cond
+      ((stringp val) val)
+      (t (case val
+           (:green "#00FF00") (:red "#FF0000") (:cyan "#00FFFF")
+           (:yellow "#FFFF00") (:magenta "#FF00FF") (:blue "#0000FF")
+           (:white "#FFFFFF") (:black "#000000")
+           (t "#FFFFFF"))))))
 
 (defun st (key) (getf *state* key))
 (defun (setf st) (val key) (setf (getf *state* key) val))
@@ -140,10 +147,10 @@ See *tui-theme-presets* for named presets (dark, light, solarized, gruvbox).")
               :search-mode nil :search-query ""           ; v0.7.2
               :search-matches nil :search-match-idx 0
               :dirty (list nil nil nil))))
-#+end_src
+#+END_SRC
 
 ** Helpers
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-state.lisp
 (defun now ()
   (multiple-value-bind (s m h) (get-decoded-time)
     (declare (ignore s))
@@ -177,10 +184,10 @@ See *tui-theme-presets* for named presets (dark, light, solarized, gruvbox).")
   (unless (st :scroll-at-bottom)
     (setf (st :scroll-notify) t))
   (setf (st :dirty) (list t t nil)))
-#+end_src
+#+END_SRC
 
 ** Event Queue
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-state.lisp
 (defun queue-event (ev)
   (bt:with-lock-held (*event-lock*) (push ev *event-queue*)))
 
@@ -188,4 +195,4 @@ See *tui-theme-presets* for named presets (dark, light, solarized, gruvbox).")
   (bt:with-lock-held (*event-lock*)
     (let ((evs (nreverse *event-queue*)))
       (setf *event-queue* nil) evs)))
-#+end_src
+#+END_SRC

org/channel-tui-view.org

@@ -3,8 +3,8 @@
 
 * View
 
-Pure render functions. Each takes a Croatoan window and current state.
-State is read via ~(st :key)~ — no mutation here.
+|Pure render functions. Each takes the cl-tty backend and current state.
+|State is read via ~(st :key)~ — no mutation here.
 
 ** Contract
 
@@ -42,31 +42,29 @@ architecture:
 All three enrichments cost 0 LLM tokens — they are daemon-state queries
 that the TUI actuator attaches to the response plist before transmission.
 
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-view.lisp
 (in-package :passepartout.channel-tui)
 
-(defun view-status (win)
-  (clear win)
-  (box win 0 0)
-  (add-string win
-   (format nil " Passepartout  ~a  [~a]  msgs:~a  scroll:~a  Rules:~a~a"
+(defun view-status (fb w)
+  (let ((line1 (format nil
+   " Passepartout  ~a  [~a]  msgs:~a  scroll:~a  Rules:~a~a"
            (if (st :connected) "● Connected" "○ Disconnected")
            (string-upcase (string (st :mode)))
            (length (st :messages))
            (if (> (st :scroll-offset) 0) (format nil "~a↑" (st :scroll-offset)) "0")
            (or (st :rule-count) 0)
            (if (st :streaming-text) "  [streaming]"
-               (if (st :busy) "  …thinking" "")))
-   :y 1 :x 1 :fgcolor (theme-color (if (st :connected) :connected :disconnected)))
+               (if (st :busy) "  …thinking" "")))))
+    (cl-tty.backend:draw-text fb 1 1 line1
+                              (theme-color (if (st :connected) :connected :disconnected))
+                              nil)
     ;; Second line: Focus map (left) + timestamp (right-aligned, v0.7.0)
     (let ((focus-info (or (st :foveal-id) "")))
       (when (and focus-info (> (length focus-info) 0))
-      (add-string win (format nil " [Focus: ~a]" focus-info)
-                  :y 2 :x 1 :fgcolor (theme-color :timestamp))))
-  (add-string win (format nil " ~a" (now))
-              :y 2 :x (max 1 (- (width win) 12))
-              :fgcolor (theme-color :timestamp))
-  (refresh win))
+        (cl-tty.backend:draw-text fb 1 2 (format nil " [Focus: ~a]" focus-info)
+                                  (theme-color :timestamp) nil)))
+    (cl-tty.backend:draw-text fb (max 1 (- w 12)) 2 (format nil " ~a" (now))
+                              (theme-color :timestamp) nil)))
 
 ;; v0.7.2: search-highlight — wrap matching text in **bold** for markdown
 (defun search-highlight (content query)
@@ -85,11 +83,8 @@ that the TUI actuator attaches to the response plist before transmission.
       (setf result (concatenate 'string result (subseq content pos)))
       (if (string= result "") content result))))
 
-(defun view-chat (win h)
-  (clear win)
-  (box win 0 0)
-  (let* ((w (or (width win) 78))
-         (msgs (st :messages))
+(defun view-chat (fb w h)
+  (let* ((msgs (st :messages))
          (total (length msgs))
          (max-lines (- h 2))
          (is-search (st :search-mode))
@@ -101,7 +96,7 @@ that the TUI actuator attaches to the response plist before transmission.
              (query (st :search-query))
              (header (format nil "Search: ~d matches for '~a' (~d/~d) — Esc to exit"
                             (length matches) query (1+ idx) (length matches))))
-        (add-string win header :y y :x 1 :n (1- w) :fgcolor (theme-color :highlight))
+        (cl-tty.backend:draw-text fb 1 y header (theme-color :highlight) nil)
         (incf y)
         (decf max-lines)))
     ;; Count visible messages from end, accounting for word wrap
@@ -148,48 +143,40 @@ that the TUI actuator attaches to the response plist before transmission.
                                     (theme-color :hitl))))
                    (dolist (line wrapped)
                       (when (< y (1- h))
-                        (if (eq role :agent)
-                            (let ((segments (parse-markdown-spans line)))
-                              (setf y (render-styled win segments y 1 w)))
-                            (progn
-                              (add-string win line :y y :x 1 :n (1- w) :fgcolor color)
-                              (incf y)))))
+                        (cl-tty.backend:draw-text fb 1 y line color nil)
+                        (incf y)))
                     ;; v0.7.2: gate trace below agent messages
                     (let ((gate-trace (getf msg :gate-trace)))
                       (when (and gate-trace (not (member i (st :collapsed-gates))))
                         (dolist (entry (passepartout::gate-trace-lines gate-trace))
                           (when (< y (1- h))
-                            (add-string win (car entry) :y y :x 3 :n (- w 4) :fgcolor (or (getf (cdr entry) :fgcolor) :dim))
-                            (incf y))))))))))
-  (refresh win))
-#+end_src
+                            (cl-tty.backend:draw-text fb 3 y (car entry)
+                                                      (or (getf (cdr entry) :fgcolor) :dim) nil)
+                            (incf y)))))))))))
+#+END_SRC
 
 ** Input Line
-#+begin_src lisp
-(defun view-input (win)
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-view.lisp
+(defun view-input (fb w)
   (let* ((text (input-string))
-         (w (or (width win) 78))
          (pos (or (st :cursor-pos) 0))
          (display-start (max 0 (- pos (1- w))))
          (visible (subseq text display-start (min (length text) (+ display-start w)))))
-    (clear win)
-    (add-string win (format nil "~a " visible) :y 0 :x 0 :n (1- w) :fgcolor (theme-color :input))
-    (setf (cursor-position win) (list 0 (min (- pos display-start) (1- w)))))
-  (refresh win))
+    (cl-tty.backend:draw-text fb 0 0 (format nil "~a " visible) (theme-color :input) nil)))
 #+end_src
 
 ** Redraw (dirty-flag dispatch)
 #+begin_src lisp
-(defun redraw (sw cw ch iw)
+(defun redraw (fb w h)
   (destructuring-bind (sd cd id) (st :dirty)
-    (when sd (view-status sw))
-    (when cd (view-chat cw ch))
-    (when id (view-input iw))
+    (when sd (view-status fb w))
+    (when cd (view-chat fb w (- h 5)))
+    (when id (view-input fb w))
     (setf (st :dirty) (list nil nil nil))))
-#+end_src
+#+END_SRC
 
 * Implementation — v0.7.0 additions
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-view.lisp
 (in-package :passepartout)
 
 (defun char-width (ch)
@@ -213,10 +200,10 @@ ASCII < 128 = 1. CJK, fullwidth, emoji = 2. Combining marks = 0. Tab = 8."
       ((<= #x20D0 code #x20FF) 0)
       ((<= #xFE00 code #xFE0F) 0)
       (t 1))))
-#+end_src
+#+END_SRC
 
 * v0.7.1 — Markdown Rendering
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-view.lisp
 (in-package :passepartout)
 
 (defun parse-markdown-spans (text)
@@ -257,21 +244,20 @@ ASCII < 128 = 1. CJK, fullwidth, emoji = 2. Combining marks = 0. Tab = 8."
                     (t (push (cons (subseq text pos) nil) results) (return))))))))
     (nreverse results)))
 
-(defun render-styled (win segments y x w)
-  "Render markdown segments to Croatoan window. Returns next y."
+(defun render-styled (fb segments y x w)
+  "Render markdown segments to cl-tty backend. Returns next y."
   (dolist (seg segments)
-    (when (>= y (height win)) (return y))
     (let* ((text (or (car seg) ""))
            (attrs (cdr seg))
            (bold (getf attrs :bold))
            (code (getf attrs :code))
-           (underline (getf attrs :underline))
            (url (getf attrs :url)))
-      (add-string win text :y y :x x :n (max 1 (- w x))
-                  :bold bold :underline underline
-                  :bgcolor (when code (theme-color :dim))
-                  :fgcolor (cond (url (theme-color :highlight))
-                                 (t (theme-color (or (getf attrs :role) :agent)))))
+      (declare (ignore code))
+      (cl-tty.backend:draw-text fb x y text
+                               (cond (url (theme-color :highlight))
+                                     (t (theme-color (or (getf attrs :role) :agent))))
+                               nil
+                               :bold bold)
       (incf x (length text))))
   y)
 
@@ -336,10 +322,10 @@ ASCII < 128 = 1. CJK, fullwidth, emoji = 2. Combining marks = 0. Tab = 8."
                                                    :keyword :function))) r)
                  (setf p fe)))))))))
     (nreverse r)))
-#+end_src
+#+END_SRC
 
 * v0.7.2 — Gate Trace
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-view.lisp
 (in-package :passepartout)
 
 (defun gate-trace-lines (trace)
@@ -366,10 +352,10 @@ ASCII < 128 = 1. CJK, fullwidth, emoji = 2. Combining marks = 0. Tab = 8."
                            (if (eq result :approval) " (HITL required)" ""))))
         (push (cons text (list :fgcolor color)) lines)))
     (nreverse lines)))
-#+end_src
+#+END_SRC
 
 * Test Suite
-#+begin_src lisp
+#+BEGIN_SRC lisp :tangle ../lisp/channel-tui-view.lisp
 (eval-when (:compile-toplevel :load-toplevel :execute)
   (ql:quickload :fiveam :silent t))
 
@@ -477,4 +463,4 @@ ASCII < 128 = 1. CJK, fullwidth, emoji = 2. Combining marks = 0. Tab = 8."
   (passepartout.channel-tui::init-state)
   (let ((cg (passepartout.channel-tui::st :collapsed-gates)))
     (is (null cg))))
-#+end_src
+#+END_SRC

passepartout.asd

@@ -16,7 +16,7 @@
                (:file "lisp/core-pipeline")))
 
 (defsystem :passepartout/tui
-  :depends-on (:passepartout :croatoan :usocket :bordeaux-threads)
+  :depends-on (:passepartout :cl-tty :usocket :bordeaux-threads)
   :serial t
   :components ((:file "lisp/channel-tui-state")
                (:file "lisp/channel-tui-view")