feat: free-form sessions, rename/end from the panel, live Claude Context (0.2.0)

- Sessions no longer need a project folder: any name works and starts in
  DEVDESK_DEFAULT_DIR unless it matches a project; `devdesk new NAME [PROJECT]`.
- Rename (✎) and end/forget (×) sessions from the Sessions panel, plus
  `devdesk rename`. The browser runs them as `devdesk attach --new|--rename|--end`
  through ttyd. Renames keep the running Claude and its recorded conversation:
  the hook, the run-wrapper and the statusline ask tmux for the current name.
- Claude Context panel is live: devdesk-statusline snapshots model,
  context-window use, cost and edits per session, which --list reports;
  Claude's footer gets a one-line summary. The panel now sits under Sessions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libexec/devdesk-claude-run

@@ -7,7 +7,9 @@ set -uo pipefail
 # shellcheck source=libexec/devdesk-lib.sh
 . "${DEVDESK_LIBEXEC:-/usr/lib/devdesk}/devdesk-lib.sh"
 
-NAME=${DEVDESK_SESSION:?DEVDESK_SESSION is not set}
+NAME=$(dd_current_session)
+[ -n "$NAME" ] || dd_die "not running inside a DevDesk session"
+
 CLAUDE_BIN=${CLAUDE_BIN:-claude}
 SETTINGS="$DEVDESK_SHARE/claude-settings.json"
 read -r -a EXTRA <<<"${CLAUDE_ARGS:-}"
@@ -63,8 +65,10 @@ menu() {
 printf '\033]2;%s\033\134' "$NAME" # pane title (ST = ESC \\)
 mode=resume
 while :; do
+    NAME=$(dd_current_session) # follow renames
     if [ "$mode" = new ]; then run_new; else run_resume; fi
     rc=$?
+    NAME=$(dd_current_session)
     while :; do
         menu "$rc"
         IFS= read -rsn1 key || exit 0

libexec/devdesk-lib.sh

@@ -11,6 +11,7 @@ if [ -r "$DEVDESK_ENV" ]; then
 fi
 
 : "${DEVDESK_PROJECTS_ROOT:=/root/code}"
+: "${DEVDESK_DEFAULT_DIR:=$DEVDESK_PROJECTS_ROOT}"
 : "${DEVDESK_DEFAULT_SESSION:=main}"
 : "${DEVDESK_SOCKET:=/run/devdesk/tmux.sock}"
 : "${DEVDESK_STATE_DIR:=/var/lib/devdesk}"
@@ -19,6 +20,7 @@ fi
 : "${DEVDESK_TMUX_UNIT:=devdesk-tmux.service}"
 
 DEVDESK_REGISTRY="$DEVDESK_STATE_DIR/registry.json"
+DEVDESK_CONTEXT_DIR="$DEVDESK_STATE_DIR/context"
 DEVDESK_NAME_RE='^[A-Za-z0-9][A-Za-z0-9_-]{0,63}$'
 
 dd_die() {
@@ -99,29 +101,30 @@ dd_registry_set_claude() {
 
 dd_registry_remove() {
     dd_registry_update 'del(.sessions[$n])' --arg n "$1"
+    rm -f "$DEVDESK_CONTEXT_DIR/$1.json"
 }
 
-# Session name -> absolute project directory (must resolve inside the projects root).
-dd_resolve_dir() {
+dd_registry_rename() {
+    dd_registry_update 'if .sessions[$old] then .sessions[$new] = .sessions[$old] | del(.sessions[$old]) else . end' \
+        --arg old "$1" --arg new "$2"
+    if [ -f "$DEVDESK_CONTEXT_DIR/$1.json" ]; then
+        mv -f "$DEVDESK_CONTEXT_DIR/$1.json" "$DEVDESK_CONTEXT_DIR/$2.json"
+    fi
+}
+
+# Project name (directory or its slug) -> absolute directory inside the projects root.
+dd_project_dir() {
     local name=$1 dir="" d root
-    if [ "$name" = "$DEVDESK_DEFAULT_SESSION" ]; then
-        dir=$DEVDESK_PROJECTS_ROOT
+    if [ -d "$DEVDESK_PROJECTS_ROOT/$name" ]; then
+        dir="$DEVDESK_PROJECTS_ROOT/$name"
     else
-        dir=$(dd_registry_get "$name" dir)
-        if [ -z "$dir" ] || [ ! -d "$dir" ]; then
-            dir=""
-            if [ -d "$DEVDESK_PROJECTS_ROOT/$name" ]; then
-                dir="$DEVDESK_PROJECTS_ROOT/$name"
-            else
-                for d in "$DEVDESK_PROJECTS_ROOT"/*/; do
-                    d=${d%/}
-                    if [ "$(dd_slugify "${d##*/}")" = "$name" ]; then
-                        dir=$d
-                        break
-                    fi
-                done
+        for d in "$DEVDESK_PROJECTS_ROOT"/*/; do
+            d=${d%/}
+            if [ "$(dd_slugify "${d##*/}")" = "$name" ]; then
+                dir=$d
+                break
             fi
-        fi
+        done
     fi
     [ -n "$dir" ] || return 1
     dir=$(realpath -e -- "$dir" 2>/dev/null) || return 1
@@ -132,6 +135,30 @@ dd_resolve_dir() {
     esac
 }
 
+# Session name -> working directory. Sessions don't need a project: the
+# registry wins, then a project of the same name, then DEVDESK_DEFAULT_DIR.
+dd_resolve_dir() {
+    local name=$1 dir
+    dir=$(dd_registry_get "$name" dir)
+    if [ -n "$dir" ] && [ -d "$dir" ]; then
+        printf '%s\n' "$dir"
+    elif [ "$name" != "$DEVDESK_DEFAULT_SESSION" ] && dir=$(dd_project_dir "$name"); then
+        printf '%s\n' "$dir"
+    else
+        realpath -e -- "$DEVDESK_DEFAULT_DIR" 2>/dev/null || printf '%s\n' "$HOME"
+    fi
+}
+
+# Name of the DevDesk session this process runs in. Asks tmux, so it stays
+# right after a rename; falls back to the DEVDESK_SESSION set at creation.
+dd_current_session() {
+    local name=""
+    if [ -n "${TMUX:-}" ] && [ -n "${TMUX_PANE:-}" ]; then
+        name=$(tmux display-message -p -t "$TMUX_PANE" '#S' 2>/dev/null)
+    fi
+    printf '%s\n' "${name:-${DEVDESK_SESSION:-}}"
+}
+
 # Arguments for `tmux new-session` that create session NAME in DIR running Claude.
 dd_new_session_args() {
     printf '%s\0' -s "$1" -c "$2" -n claude -e "DEVDESK_SESSION=$1" "$DEVDESK_LIBEXEC/devdesk-claude-run"

libexec/devdesk-session-hook

@@ -7,13 +7,14 @@
 # shellcheck source=libexec/devdesk-lib.sh
 . "${DEVDESK_LIBEXEC:-/usr/lib/devdesk}/devdesk-lib.sh" || exit 0
 
-[ -n "${DEVDESK_SESSION:-}" ] || exit 0
-dd_valid_name "$DEVDESK_SESSION" || exit 0
+session=$(dd_current_session)
+[ -n "$session" ] || exit 0
+dd_valid_name "$session" || exit 0
 
 input=$(cat)
 id=$(jq -r '.session_id // empty' <<<"$input" 2>/dev/null)
 source=$(jq -r '.source // empty' <<<"$input" 2>/dev/null)
 [ -n "$id" ] || exit 0
 
-dd_registry_set_claude "$DEVDESK_SESSION" "$id" "$source" 2>/dev/null
+dd_registry_set_claude "$session" "$id" "$source" 2>/dev/null
 exit 0

libexec/devdesk-statusline

@@ -0,0 +1,48 @@
+#!/bin/bash
+# Claude Code statusLine command (wired in via claude-settings.json). Claude pipes
+# its status JSON in on every update; we keep a snapshot per DevDesk session for
+# the web UI's Claude Context panel and print a one-line status for Claude's footer.
+# Runs often while Claude streams, so it stays cheap and never fails loudly.
+
+input=$(cat)
+
+session=""
+if [ -n "${TMUX:-}" ] && [ -n "${TMUX_PANE:-}" ]; then
+    session=$(tmux display-message -p -t "$TMUX_PANE" '#S' 2>/dev/null)
+fi
+session=${session:-${DEVDESK_SESSION:-}}
+
+if [[ $session =~ ^[A-Za-z0-9][A-Za-z0-9_-]{0,63}$ ]]; then
+    dir="${DEVDESK_STATE_DIR:-/var/lib/devdesk}/context"
+    if mkdir -p "$dir" 2>/dev/null && tmp=$(mktemp "$dir/.$session.XXXXXX" 2>/dev/null); then
+        if jq -cM '{
+            updated: (now | floor),
+            claude_session_id: .session_id,
+            model: .model.display_name,
+            model_id: .model.id,
+            effort: .effort.level,
+            used_pct: .context_window.used_percentage,
+            window: .context_window.context_window_size,
+            used_tokens: (.context_window.current_usage
+                | if . then ((.input_tokens // 0) + (.cache_creation_input_tokens // 0)
+                             + (.cache_read_input_tokens // 0)) else null end),
+            cost_usd: .cost.total_cost_usd,
+            lines_added: .cost.total_lines_added,
+            lines_removed: .cost.total_lines_removed
+        }' <<<"$input" >"$tmp" 2>/dev/null; then
+            mv -f "$tmp" "$dir/$session.json"
+        else
+            rm -f "$tmp"
+        fi
+    fi
+fi
+
+# Footer line, in TDS colours: session · model · context % · cost
+jq -rM --arg s "$session" '
+    def c($rgb; $t): "\u001b[38;2;\($rgb)m\($t)\u001b[0m";
+    def pct: if . == null then "—" else "\(. | floor)%" end;
+    [ (if $s != "" then c("255;107;0"; "◈ \($s)") else empty end),
+      c("0;212;255"; .model.display_name // "Claude"),
+      c("127;163;191"; "ctx \(.context_window.used_percentage | pct)"),
+      c("62;96;122"; "$\((.cost.total_cost_usd // 0) * 100 | round / 100)")
+    ] | join(c("62;96;122"; " · "))' <<<"$input" 2>/dev/null || true