@@ -6,20 +6,25 @@ A tmux session of side-by-side AI coding agent CLIs that watch and message each
 
 ## Requirements
 
-- tmux 3.2 or newer (percentage `main-pane-width`)
+- tmux 3.2 or newer
 - At least one agent CLI installed (claude, codex, copilot, ...)
 
 ## Installation
 
 ```sh
 ./install.sh                    # symlink as peon-code into ~/.local/bin
-peon-code uninstall [bin-dir]   # remove that symlink
 ```
 
 After installation, run `peon-code` from any directory.
 
 `install.sh` seeds `~/.config/peon-code/peon-code.conf` from the example if it is missing.
 
+To uninstall:
+
+```sh
+peon-code uninstall [bin-dir]   # remove the install.sh symlink
+```
+
 ## Quick start
 
 ```sh
@@ -57,9 +62,9 @@ Detaching leaves the session alive. Use `dismiss` to actually stop it.
 
 `resume` builds the session the same way as a plain start, except each agent reopens the conversation it had in that session and directory before, so the team keeps its memory across a `dismiss` or a reboot. The team, session name, and roles resolve exactly as they do for a start.
 
-Each brief carries the phrase `agent <name> of peon-code session <session>,` (trailing comma included, so one session name that is a prefix of another never matches the other's transcripts), and that phrase is what `resume` looks for in the CLIs' own transcripts, newest first: `~/.claude/projects/<directory>/*.jsonl` for claude, `~/.codex/sessions/**/rollout-*.jsonl` for codex, where the rollout must also record the current working directory. The marker is unique per agent, so a team of any size reopens one conversation per pane rather than every same-CLI pane landing in the newest one. Transcripts older than 30 days are not searched.
+Each brief carries the phrase `agent <name> of peon-code session <session>,` (trailing comma included, so one session name that is a prefix of another never matches the other's transcripts), and that phrase is what `resume` looks for in the CLIs' own transcripts, newest first: `~/.claude/projects/<directory>/*.jsonl` for claude, `~/.codex/sessions/**/rollout-*.jsonl` for codex (the rollout must also record the current working directory), `~/.copilot/session-state/<id>/events.jsonl` for copilot (the events log must also record the current working directory), `~/.gemini/tmp/<sha256 of the directory>/chats/*.jsonl` for gemini, and `~/.qwen/projects/<directory>/chats/<id>.jsonl` for qwen. The marker is unique per agent, so a team of any size reopens one conversation per pane rather than every same-CLI pane landing in the newest one. Transcripts older than 30 days are not searched.
 
-claude panes launch as `claude --resume <id>`, codex panes as `codex resume <id>`, both keeping the config's own arguments. Other providers have no resume handle here and start fresh. An agent with no earlier thread is named on stderr and starts fresh too.
+claude panes launch as `claude --resume <id>`, codex panes as `codex resume <id>`, copilot panes as `copilot --resume=<id>`, gemini and qwen panes as `<cli> --resume <id>`, all keeping the config's own arguments; copilot, gemini, and qwen still get the brief through `-i`. Any other provider has no resume handle here and starts fresh. An agent with no earlier thread is named on stderr and starts fresh too.
 
 Each resumed pane still gets the full brief, since pane ids change with every session.
 
@@ -113,8 +118,8 @@ A team without roles (agent commands on the command line, or a config of all `-`
 |----------|-----------------|----------------|
 | claude | launched bare, brief pasted in once its TUI is up | `--resume <id>` |
 | codex | positional prompt, stays interactive | `resume <id>` |
-| copilot | `-i <prompt>` (verified) | not supported |
-| gemini, qwen | `-i <prompt>` (unverified on this machine) | not supported |
+| copilot | `-i <prompt>` (verified) | `--resume=<id>` |
+| gemini, qwen | `-i <prompt>` (unverified on this machine) | `--resume <id>` |
 | anything else | passed through as-is | not supported |
 
 Every brief is written to a file under `$TMPDIR`, and the pane launches with `<cmd> "$(cat <file>)"`, so the command line stays one line instead of thousands of escaped characters.
 
@@ -20,19 +20,28 @@ role_label() {
 }
 
 # Previous thread of one agent, found by the marker phrase its brief carries:
-# the phrase names the agent and the session, and both CLIs record the prompt
+# the phrase names the agent and the session, and the CLIs record the prompt
 # in their transcript, so no launch-time bookkeeping is needed. Newest match
 # wins; empty output means there is nothing to resume and the pane starts new.
 # ponytail: the search is capped at 30 days of transcripts, the age past which
 # a thread is not worth reviving.
 last_thread_id() {
-  local marker=$1 bin=$2 dir cwd="" found file id
+  local marker=$1 bin=$2 dir cwd="" hash found file id
   case $bin in
-    claude) dir="${CLAUDE_CONFIG_DIR:-$HOME/.claude}/projects/${PWD//[^A-Za-z0-9]/-}" ;;
-    codex)  dir="${CODEX_HOME:-$HOME/.codex}/sessions"
-            # Rollouts of every directory share this store; a match must also
-            # carry the cwd line naming this directory.
-            cwd="\"cwd\":\"$PWD\"" ;;
+    claude)  dir="${CLAUDE_CONFIG_DIR:-$HOME/.claude}/projects/${PWD//[^A-Za-z0-9]/-}" ;;
+    codex)   dir="${CODEX_HOME:-$HOME/.codex}/sessions"
+             # Rollouts of every directory share this store; a match must also
+             # carry the cwd line naming this directory.
+             cwd="\"cwd\":\"$PWD\"" ;;
+    copilot) dir="$HOME/.copilot/session-state"
+             # Session logs of every directory share this store; a match must
+             # also carry the cwd line naming this directory.
+             cwd="\"cwd\":\"$PWD\"" ;;
+    gemini)  # gemini keys its per-directory store by the SHA-256 of the path
+             hash=$(printf '%s' "$PWD" | shasum -a 256 2>/dev/null) ||
+               hash=$(printf '%s' "$PWD" | sha256sum 2>/dev/null) || return 0
+             dir="$HOME/.gemini/tmp/${hash%% *}/chats" ;;
+    qwen)    dir="$HOME/.qwen/projects/${PWD//[^A-Za-z0-9]/-}/chats" ;;
     *) return 0 ;;  # no known transcript store, so no resume handle
   esac
   [ -d "$dir" ] || return 0
@@ -43,9 +52,23 @@ last_thread_id() {
   while IFS= read -r file; do
     grep -qF -- "$marker" "$file" || continue
     [ -z "$cwd" ] || grep -qF -- "$cwd" "$file" || continue
-    id=${file##*/}
-    id=${id%.jsonl}
-    printf '%s\n' "${id: -36}"  # claude names the file by id, codex suffixes it
+    case $bin in
+      copilot) id=${file%/*}          # <id>/events.jsonl: the directory is the id
+               id=${id##*/} ;;
+      gemini)  # the filename holds 8 chars of the id; the body holds it all.
+               # First occurrence in file order: the top-level sessionId comes
+               # before any sessionId nested inside a message.
+               id=$(grep -o '"sessionId"[[:space:]]*:[[:space:]]*"[^"]*"' "$file" | head -n 1) || true
+               id=${id%\"}
+               id=${id##*\"} ;;
+      codex)   id=${file##*/}
+               id=${id%.jsonl}
+               id=${id: -36} ;;       # rollout-<timestamp>-<id>.jsonl
+      *)       id=${file##*/}
+               id=${id%.jsonl} ;;     # claude and qwen name the file by the id
+    esac
+    [ -n "$id" ] || continue
+    printf '%s\n' "$id"
     return 0
   done < <(printf '%s\n' "$found" | tr '\n' '\0' | xargs -0 ls -t 2>/dev/null)
 }
 
@@ -12,10 +12,10 @@
 # Team resolution: CLI agent commands > -c file > ./peon-code.conf >
 # ~/.config/peon-code/peon-code.conf > claude codex.
 # Known agents get the right "interactive session + initial prompt" launch:
-#   claude          launched bare, brief pasted in once its TUI is up
-#   codex           positional prompt, stays interactive (default passthrough)
-#   copilot         -i <prompt>  (verified on this machine)
-#   gemini, qwen    -i <prompt>  (documented; unverified on this machine)
+#   claude          launched bare, brief pasted in once its TUI is up; resumes with --resume <id>
+#   codex           positional prompt, stays interactive; resumes with resume <id>
+#   copilot         -i <prompt>  (verified on this machine); resumes with --resume=<id>
+#   gemini, qwen    -i <prompt>  (documented; unverified on this machine); resume with --resume <id>
 # Any other command is passed through as-is: <cmd> <quoted-brief>.
 set -euo pipefail
 
@@ -27,8 +27,9 @@ usage() {
   cat <<'USAGE'
 peon-code.sh [-c file] [<session>] [<cmd> ...]  start or attach a team
                                                 (session defaults to the current directory name)
-peon-code.sh resume [<session>] [<cmd> ...]     same, each agent reopening its
-                                                last conversation (claude, codex)
+peon-code.sh resume [<session>] [<cmd> ...]     same, each agent reopening its last
+                                                conversation (claude, codex, copilot,
+                                                gemini, qwen)
 peon-code.sh dismiss [<session>]                kill one session
                                                 (session defaults to the current directory name)
 peon-code.sh msg <name|all> 'text' [<session>]  send text to an agent pane
@@ -204,16 +205,20 @@ EOF
   # Map known CLIs to their interactive-session-with-initial-prompt syntax.
   # First token is the binary; trailing user args are preserved before the flag.
   # A resume id, when there is one, goes right after the binary, since codex
-  # takes it as a subcommand and both CLIs read their options after it.
+  # takes it as a subcommand and every CLI reads its options after it. For
+  # copilot, gemini, and qwen the id rides alongside -i: their flag
+  # validation permits the pair, though their docs do not show it.
   BIN=${CMDS[$i]%% *}
   ARGS=""
   [ "${CMDS[$i]}" = "$BIN" ] || ARGS=" ${CMDS[$i]#* }"
   RID=${RESUME_IDS[$i]}
+  # Quoted for the pane's shell: a qwen id can be a saved-chat tag, not a uuid.
+  RID=${RID:+$(printf %q "$RID")}
   case "$BIN" in
     claude)      LAUNCH="$BIN${RID:+ --resume $RID}$ARGS" ;;  # bare, keeping user args; the brief follows the TUI
     codex)       LAUNCH="$BIN${RID:+ resume $RID}$ARGS $Q" ;; # positional prompt, stays interactive
-    copilot)     LAUNCH="${CMDS[$i]} -i $Q" ;;  # -i starts the interactive TUI and runs the prompt
-    gemini|qwen) LAUNCH="${CMDS[$i]} -i $Q" ;;  # unverified on this machine
+    copilot)     LAUNCH="$BIN${RID:+ --resume=$RID}$ARGS -i $Q" ;;  # -i starts the interactive TUI and runs the prompt
+    gemini|qwen) LAUNCH="$BIN${RID:+ --resume $RID}$ARGS -i $Q" ;;  # unverified on this machine
     *)           LAUNCH="${CMDS[$i]} $Q" ;;     # anything else: positional prompt
   esac
   printf '%s' "$LAUNCH" | paste_to_pane "${PANE_IDS[$i]}"
 
@@ -205,27 +205,48 @@ test_config_loading() {
 test_resume_picks_each_agent_thread() {
   local fake_bin=$1 log="$TEST_DIR/tmux-resume.log" home_dir="$TEST_DIR/home-resume"
   local work_dir="$TEST_DIR/resume-work" claude_dir codex_dir slug launch
+  local copilot_dir gemini_dir qwen_dir hash
   mkdir -p "$home_dir" "$work_dir"
   work_dir=$(cd "$work_dir" && pwd)  # the launcher sees the normalized path
   slug=${work_dir//[^A-Za-z0-9]/-}
   claude_dir="$home_dir/.claude/projects/$slug"
   codex_dir="$home_dir/.codex/sessions/2026/07/26"
-  mkdir -p "$claude_dir" "$codex_dir"
+  copilot_dir="$home_dir/.copilot/session-state/44444444-4444-4444-4444-444444444444"
+  hash=$(printf '%s' "$work_dir" | shasum -a 256 2>/dev/null) ||
+    hash=$(printf '%s' "$work_dir" | sha256sum)
+  gemini_dir="$home_dir/.gemini/tmp/${hash%% *}/chats"
+  qwen_dir="$home_dir/.qwen/projects/$slug/chats"
+  mkdir -p "$claude_dir" "$codex_dir" "$copilot_dir" "$gemini_dir" "$qwen_dir"
   printf 'agent boss of peon-code session resume-test, in pane\n' \
     >"$claude_dir/11111111-1111-1111-1111-111111111111.jsonl"
   printf 'agent second of peon-code session resume-test, in pane\n' \
     >"$claude_dir/22222222-2222-2222-2222-222222222222.jsonl"
   printf '{"cwd":"%s"}\nagent impl of peon-code session resume-test, in pane\n' "$work_dir" \
     >"$codex_dir/rollout-2026-07-26T00-00-00-33333333-3333-3333-3333-333333333333.jsonl"
-  sleep 1  # the decoy session's transcript sorts newer than the real ones
+  printf '{"type":"session.start","data":{"context":{"cwd":"%s"}}}\nagent cop of peon-code session resume-test, in pane\n' "$work_dir" \
+    >"$copilot_dir/events.jsonl"
+  # One line holding a nested sessionId after the real one: the top-level id must win.
+  printf '{"sessionId":"55555555-5555-5555-5555-555555555555","messages":[{"text":"agent gem of peon-code session resume-test, in pane"}],"extra":{"sessionId":"aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"}}\n' \
+    >"$gemini_dir/session-20260726-000000-55555555.jsonl"
+  printf 'agent qw of peon-code session resume-test, in pane\n' \
+    >"$qwen_dir/66666666-6666-6666-6666-666666666666.jsonl"
+  # A qwen id can be a saved-chat tag shorter than a uuid.
+  printf 'agent qw2 of peon-code session resume-test, in pane\n' \
+    >"$qwen_dir/mytag.jsonl"
+  sleep 1  # the decoy transcripts sort newer than the real ones
   printf 'agent boss of peon-code session resume-test2, in pane\n' \
     >"$claude_dir/99999999-9999-9999-9999-999999999999.jsonl"
-  printf 'boss claude -\n*second claude -\nimpl codex manager\nscout codex -\n' >"$work_dir/peon-code.conf"
+  # Same marker, other directory: the copilot store is shared across directories.
+  mkdir -p "$home_dir/.copilot/session-state/88888888-8888-8888-8888-888888888888"
+  printf '{"type":"session.start","data":{"context":{"cwd":"%s"}}}\nagent cop of peon-code session resume-test, in pane\n' "$work_dir/elsewhere" \
+    >"$home_dir/.copilot/session-state/88888888-8888-8888-8888-888888888888/events.jsonl"
+  printf 'boss claude -\n*second claude -\nimpl codex manager\nscout codex -\ncop copilot -\ngem gemini -\nqw qwen -\nqw2 qwen -\n' \
+    >"$work_dir/peon-code.conf"
 
   (
     cd "$work_dir"
     PATH="$fake_bin:$PATH" HOME="$home_dir" TMPDIR="$TEST_DIR" \
-      FAKE_TMUX_LOG="$log" FAKE_TMUX_MODE=launch FAKE_TMUX_PANES=4 \
+      FAKE_TMUX_LOG="$log" FAKE_TMUX_MODE=launch FAKE_TMUX_PANES=8 \
       "$ROOT/peon-code.sh" resume resume-test
   ) >"$TEST_DIR/resume.out" 2>"$TEST_DIR/resume.err" || true
 
@@ -235,9 +256,17 @@ test_resume_picks_each_agent_thread() {
   assert_contains <(printf '%s\n' "$launch") \
     "buffer-content:claude --resume 22222222-2222-2222-2222-222222222222"
   assert_contains "$log" "buffer-content:codex resume 33333333-3333-3333-3333-333333333333"
+  assert_contains "$log" "buffer-content:copilot --resume=44444444-4444-4444-4444-444444444444 -i"
+  assert_contains "$log" "buffer-content:gemini --resume 55555555-5555-5555-5555-555555555555 -i"
+  assert_contains "$log" "buffer-content:qwen --resume 66666666-6666-6666-6666-666666666666 -i"
+  assert_contains "$log" "buffer-content:qwen --resume mytag -i"
   assert_contains "$TEST_DIR/resume.err" "no earlier thread for scout"
   # A session name that is a prefix of another must not match its transcripts.
   assert_not_contains "$log" "99999999-9999-9999-9999-999999999999"
+  # The copilot match from the other directory must not be resumed.
+  assert_not_contains "$log" "88888888-8888-8888-8888-888888888888"
+  # The nested sessionId in the gemini body must not be resumed.
+  assert_not_contains "$log" "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"
   # The *-marked agent (not the manager) is moved into the main slot of a
   # main-vertical layout, and the mark is stripped from its name.
   assert_contains "$log" "swap-pane -d -s %2 -t %1"