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human-being skill — tmux-based multi-agent orchestration for Claude Code (PO proxy → Navigator ←→ Driver)

human-being skill

Simulate a human operator coordinating AI agents via tmux — PO proxy → Navigator ←→ Driver.

Three-layer hierarchy: the user (PO) delegates to PO proxy (the Claude Code session you're talking to), which directs Navigator and Driver running in separate tmux panes.

Files

File Goes to
SKILL.md <claude-code-plugin>/skills/tl-dx-human-being/SKILL.md
human-being-hooks.sh <claude-code-plugin>/skills/tl-dx-human-being/scripts/human-being-hooks.sh
navigator-driver-briefing.md <claude-code-plugin>/skills/tl-dx-human-being/references/navigator-driver-briefing.md

If you just want to try the skill without setting up a Claude Code plugin, drop these three files into any folder that Claude Code can load skills from, preserving the relative paths (scripts/ and references/ siblings of SKILL.md).

Quickstart

  1. Place the three files in the layout shown above
  2. Run bash human-being-hooks.sh from the skill directory to install the hook events into your project's .claude/settings.json (it merges, doesn't overwrite)
  3. Start a Claude Code session — the skill is invoked via /tl-dx:tl-dx-human-being or whatever command name your plugin exposes
  4. The session becomes PO proxy; tell it what you want done and it'll open tmux panes for Navigator and Driver

Context

Written up here: https://notes.qrtt1.io/posts/human-being-diy-agentic-workflow — a walkthrough of using this to drive a small MVP from requirements.md to push, with agents navigating themselves.

The point of the skill is not that it's clever — it's that it's a plain-text SOP you can rewrite in any editor. Iteration is in natural language, not code.

License

This is a snapshot for reference. Upstream lives in twjug-lite-infra/plugins/tl-dx.

#!/usr/bin/env bash
# human-being-hooks.sh — manage hooks for tl-dx-human-being skill
#
# Usage:
# human-being-hooks.sh log <event-type> # called by hook, appends event
# human-being-hooks.sh install [settings.json] # add hooks to settings file
# human-being-hooks.sh cleanup [session] [settings.json] # remove hooks + event file
# human-being-hooks.sh list [session] # show recent events
# human-being-hooks.sh status [session] # last event timestamp
# human-being-hooks.sh send <pane> <text> # send text to pane, auto-handle Pasted text
# human-being-hooks.sh send-file <pane> <file> # send file contents to pane
# human-being-hooks.sh role-status [session] # last event per role
# human-being-hooks.sh stale [session] [minutes] # find roles stuck busy too long
# human-being-hooks.sh codex-status <pane> # check Codex Driver state via capture-pane
set -euo pipefail
SCRIPT_PATH="$(cd "$(dirname "$0")" && pwd)/$(basename "$0")"
HOOK_TAG="tl-dx-human-being"
EVENT_DIR="/tmp"
get_session() {
tmux display-message -p '#S' 2>/dev/null || echo "default"
}
event_file() {
local session="${1:-$(get_session)}"
echo "${EVENT_DIR}/claude-events-${session}.jsonl"
}
# --- Subcommands ---
HOOK_EVENTS=("SessionStart" "UserPromptSubmit" "Stop" "PermissionRequest" "Notification")
cmd_log() {
local event_type="${1:-unknown}"
local session
session="$(get_session)"
local role="${ROLE:-unknown}"
local ts
ts="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
echo "{\"event\":\"${event_type}\",\"ts\":\"${ts}\",\"session\":\"${session}\",\"role\":\"${role}\",\"skill\":\"${HOOK_TAG}\"}" \
>> "$(event_file "$session")"
}
cmd_install() {
local settings="${1:-.claude/settings.json}"
# If already installed, remove old hooks first (plugin version may have changed)
# Pass "skip-events" as session to avoid deleting event files during reinstall
if [ -f "$settings" ] && grep -q "${HOOK_TAG}" "$settings" 2>/dev/null; then
echo "Removing old hooks from ${settings} before reinstalling..."
cmd_remove_hooks "$settings"
fi
if ! command -v jq &>/dev/null; then
echo "Error: jq is required to install hooks." >&2
exit 1
fi
# Start from existing settings or empty object
local base="{}"
if [ -f "$settings" ]; then
base="$(cat "$settings")"
fi
local tmp="${settings}.tmp.$$"
local jq_expr="."
for evt in "${HOOK_EVENTS[@]}"; do
local entry
entry=$(jq -n --arg cmd "${SCRIPT_PATH} log ${evt}" '{
"matcher": "",
"hooks": [{"type": "command", "command": $cmd, "timeout": 5}]
}')
jq_expr="${jq_expr} | .hooks.${evt} = (.hooks.${evt} // []) + [\$entry_${evt}]"
done
# Build jq args dynamically
local jq_args=()
for evt in "${HOOK_EVENTS[@]}"; do
local entry
entry=$(jq -n --arg cmd "${SCRIPT_PATH} log ${evt}" '{
"matcher": "",
"hooks": [{"type": "command", "command": $cmd, "timeout": 5}]
}')
jq_args+=(--argjson "entry_${evt}" "$entry")
done
if echo "$base" | jq "${jq_args[@]}" '
.hooks.SessionStart = (.hooks.SessionStart // []) + [$entry_SessionStart]
| .hooks.UserPromptSubmit = (.hooks.UserPromptSubmit // []) + [$entry_UserPromptSubmit]
| .hooks.Stop = (.hooks.Stop // []) + [$entry_Stop]
| .hooks.PermissionRequest = (.hooks.PermissionRequest // []) + [$entry_PermissionRequest]
| .hooks.Notification = (.hooks.Notification // []) + [$entry_Notification]
' > "$tmp"; then
mv "$tmp" "$settings"
echo "Hooks added to ${settings}: ${HOOK_EVENTS[*]}"
else
rm -f "$tmp"
echo "Error: failed to install hooks into ${settings}." >&2
exit 1
fi
}
cmd_remove_hooks() {
local settings="${1:-.claude/settings.json}"
if [ -f "$settings" ] && grep -q "${HOOK_TAG}" "$settings" 2>/dev/null; then
if command -v jq &>/dev/null; then
local tmp="${settings}.tmp.$$"
local jq_expr="."
for evt in "${HOOK_EVENTS[@]}"; do
jq_expr="${jq_expr} | .hooks.${evt} = [.hooks.${evt}[]? | select(.hooks[]?.command | contains(\$tag) | not)] | if .hooks.${evt} == [] then del(.hooks.${evt}) else . end"
done
if jq --arg tag "${HOOK_TAG}" "${jq_expr}" "$settings" > "$tmp"; then
mv "$tmp" "$settings"
echo "Hooks removed from ${settings}."
else
rm -f "$tmp"
echo "Warning: failed to remove hooks from ${settings}." >&2
fi
fi
fi
}
cmd_cleanup() {
local session="${1:-}"
local settings="${2:-.claude/settings.json}"
# Remove event file(s)
if [ -n "$session" ]; then
local ef
ef="$(event_file "$session")"
if [ -f "$ef" ]; then
rm -f "$ef"
echo "Removed ${ef}"
fi
else
# Clean all event files
local count=0
for f in "${EVENT_DIR}"/claude-events-*.jsonl; do
[ -f "$f" ] || continue
rm -f "$f"
count=$((count + 1))
done
if [ "$count" -gt 0 ]; then
echo "Removed ${count} event file(s)."
fi
fi
# Remove hooks from settings.json
cmd_remove_hooks "$settings"
}
cmd_list() {
local session="${1:-$(get_session)}"
local ef
ef="$(event_file "$session")"
if [ -f "$ef" ]; then
cat "$ef"
else
echo "No events for session '${session}'."
fi
}
cmd_status() {
local session="${1:-$(get_session)}"
local ef
ef="$(event_file "$session")"
if [ -f "$ef" ]; then
tail -1 "$ef"
else
echo "No events for session '${session}'."
fi
}
cmd_send() {
local pane="${1:?Usage: send <pane> <text>}"
shift
local text="$*"
if [ -z "$text" ]; then
# Read from stdin if no text argument (supports piping / here-doc)
text="$(cat)"
fi
if [ -z "$text" ]; then
echo "Error: no text provided." >&2
exit 1
fi
tmux send-keys -t "$pane" "$text" Enter
sleep 1
# Check for Pasted text indicator and send extra Enter if needed
if tmux capture-pane -t "$pane" -p | tail -5 | grep -q 'Pasted text'; then
tmux send-keys -t "$pane" Enter
sleep 0.5
if tmux capture-pane -t "$pane" -p | tail -5 | grep -q 'Pasted text'; then
echo "Warning: 'Pasted text' still visible after retry." >&2
fi
fi
}
cmd_codex_status() {
local pane="${1:?Usage: codex-status <pane>}"
# Codex has no hook events. Infer state from screen content.
# Codex idle prompt shows: › Implement {feature}
# When processing, the › line shows the actual input text instead.
local content
content="$(tmux capture-pane -t "$pane" -p | tail -10)"
if echo "$content" | grep -qE "Implement \{feature\}"; then
echo "IDLE"
else
echo "BUSY (or unknown — use capture-pane to verify)"
fi
}
cmd_send_file() {
local pane="${1:?Usage: send-file <pane> <file>}"
local file="${2:?Usage: send-file <pane> <file>}"
if [ ! -f "$file" ]; then
echo "Error: file not found: ${file}" >&2
exit 1
fi
local text
text="$(cat "$file")"
cmd_send "$pane" "$text"
}
cmd_role_status() {
local session="${1:-$(get_session)}"
local ef
ef="$(event_file "$session")"
if [ ! -f "$ef" ]; then
echo "No events for session '${session}'."
return
fi
# For each unique role, print the last event
awk -F'"' '{
for (i=1; i<=NF; i++) {
if ($i == "role") role=$(i+2)
if ($i == "event") event=$(i+2)
if ($i == "ts") ts=$(i+2)
}
if (role != "") last[role] = event " (" ts ")"
}
END {
for (r in last) print r ": " last[r]
}' "$ef" | sort
}
cmd_stale() {
local session="${1:-$(get_session)}"
local threshold_min="${2:-5}"
local ef
ef="$(event_file "$session")"
if [ ! -f "$ef" ]; then
echo "No events for session '${session}'."
return
fi
local now_epoch
now_epoch="$(date +%s)"
local found=0
local role event ts event_epoch diff_sec diff_min
# For each role, get last event; if it's UserPromptSubmit and older than threshold, report
while IFS= read -r line; do
role="$(echo "$line" | awk -F'"' '{ for(i=1;i<=NF;i++) if($i=="role") print $(i+2) }')"
event="$(echo "$line" | awk -F'"' '{ for(i=1;i<=NF;i++) if($i=="event") print $(i+2) }')"
ts="$(echo "$line" | awk -F'"' '{ for(i=1;i<=NF;i++) if($i=="ts") print $(i+2) }')"
if [ "$event" = "UserPromptSubmit" ] && [ -n "$ts" ]; then
# Parse ISO timestamp to epoch (works on macOS and GNU date)
if date -j -f "%Y-%m-%dT%H:%M:%SZ" "$ts" +%s &>/dev/null; then
event_epoch="$(date -j -f "%Y-%m-%dT%H:%M:%SZ" "$ts" +%s)"
else
event_epoch="$(date -d "$ts" +%s 2>/dev/null || echo 0)"
fi
diff_sec=$(( now_epoch - event_epoch ))
diff_min=$(( diff_sec / 60 ))
if [ "$diff_min" -ge "$threshold_min" ]; then
echo "STALE: ${role} — UserPromptSubmit ${diff_min} minutes ago (${ts})"
found=1
fi
fi
done < <(
# Get last event per role
awk -F'"' '{
for (i=1; i<=NF; i++) {
if ($i == "role") role=$(i+2)
}
if (role != "") lines[role] = $0
}
END {
for (r in lines) print lines[r]
}' "$ef"
)
if [ "$found" -eq 0 ]; then
echo "No stale roles."
fi
}
# --- Main ---
cmd="${1:-}"
shift || true
case "$cmd" in
log) cmd_log "$@" ;;
install) cmd_install "$@" ;;
cleanup) cmd_cleanup "$@" ;;
list) cmd_list "$@" ;;
status) cmd_status "$@" ;;
send) cmd_send "$@" ;;
send-file) cmd_send_file "$@" ;;
role-status) cmd_role_status "$@" ;;
stale) cmd_stale "$@" ;;
codex-status) cmd_codex_status "$@" ;;
*)
echo "Usage: $(basename "$0") {log|install|cleanup|list|status|send|send-file|role-status|stale|codex-status} [args...]" >&2
exit 1
;;
esac

Navigator and Driver Role Definitions

Use these definitions when briefing agents via tmux send-keys. Adapt the wording to fit context, but preserve the role boundaries.

Navigator — the one who calls the shots

Navigator owns direction and decisions. It briefs Driver before starting, then continuously steers.

Opening brief template

Send to Navigator after assigning a task:

You are Navigator. Your job is to direct Driver to complete tasks.
Driver is in another pane. Use the send helper ($HOOK_SCRIPT send <pane> <text>) to communicate — it auto-handles Pasted text issues. Fall back to raw tmux send-keys only for short commands.
To check Driver's state, read the event file first (see below), only capture-pane when you need screen content.
I (PO proxy) give you goals and priorities. You break them down, schedule, and direct Driver.
Tell me when you need my decision. Everything else is your call.

Important: you only plan and delegate — never write code, edit files, or run commands yourself.
When something requires human action (generating API tokens, setting up OAuth, manual console operations),
defer the task and tell me it needs human intervention. I will relay it to PO.

Event file: /tmp/claude-events-<session>.jsonl
Check Driver's state before sending instructions:
  tail -20 <event-file> | grep '"role":"Driver"' | tail -1
- Last event "Stop" → Driver is idle, safe to send task
- Last event "UserPromptSubmit" → Driver is busy, wait
- Last event "PermissionRequest" → Driver needs Allow/Deny, handle or tell PO proxy

Task goals:
1. [Big picture — what we're doing this session]
2. [Priority — what to do first and why]
3. [Conventions — project rules or constraints]

Continuous navigation behaviors

Navigator should:

  • Check alignment: is the current action moving toward the goal?
  • Direct next steps: tell Driver what to do, don't do it yourself
  • Listen to Driver: Driver thinks out loud — Navigator judges:
    • Makes sense → acknowledge, let Driver continue
    • Drifting → push back immediately
    • Too expensive → stop it (costly API calls, huge downloads, etc.)
  • Guard safety and cost:
    • Block dangerous operations
    • Watch token usage, API costs, large downloads
    • If a direction takes too long, switch topics decisively

Navigator's mantra: "What's our goal? Is this step moving us there?"

Common anti-pattern

Navigator starts reading code, researching, analyzing — leaving Driver idle. Navigator's job is to steer, not to do. Everything hands-on (reading code, checking docs, running commands) should be delegated to Driver via send-keys. Navigator only reads results and makes judgment calls.

Driver — the one who does the work

Driver handles all hands-on labor in its own pane.

Opening brief template

Send to Driver:

You are Driver. Your job is hands-on implementation.
Navigator tells you what to do. If you hit a problem or get stuck, tell Navigator — don't decide on your own.
Think out loud — narrate what you're doing so Navigator can follow along.

Important: do not change approach or expand scope on your own.
If you want to switch direction, think the requirements are wrong, or want to do something extra, check with Navigator first.

Codex Driver — opening brief

Use the same Driver brief template above. The role definition is identical regardless of CLI tool.

Codex-specific monitoring notes for Navigator:

  • Codex does NOT write to the event file. role-status and stale commands will not show Codex state.
  • Use $HOOK_SCRIPT codex-status <pane> to infer idle/busy: idle when Implement {feature} placeholder is visible in the prompt area; busy when the line shows actual submitted text instead. This heuristic may report "unknown" during transitions — capture-pane directly when in doubt.
  • Codex numbered menus accept number key input: type "1" + Enter to select item 1. Different from Claude Code which requires arrow keys.
  • [Pasted text] does NOT appear in Codex. Multi-line text sent via send-keys goes into the buffer directly but requires a separate Enter to submit.
  • To exit Codex: Ctrl+C (press multiple times if needed). /exit does not work — it gets sent to the AI as input.

Driver behaviors

  • Execute commands, write code, run tests in its own session
  • Think out loud: narrate what it's doing ("I'll install this package first, then...")
  • Report problems: don't power through alone — tell Navigator what's happening
  • Never make strategic decisions: "should we switch approach?" goes to Navigator

Multi-driver mode

When Navigator manages multiple Drivers, additional rules apply:

  • Assign each Driver independent, non-overlapping work. Two Drivers editing the same file will cause conflicts.
  • Track Drivers by pane number (Driver in pane 1, Driver in pane 2, etc.). Use distinct task labels when sending instructions so each Driver knows its scope.
  • Check all Driver panes via role-status — since all Drivers share ROLE=Driver, use capture-pane on each pane to distinguish them.
  • When one Driver finishes, assign it the next task immediately. Don't wait for all Drivers to finish before dispatching new work.
  • If Drivers need to share results (e.g., Driver-1's output feeds Driver-2), Navigator coordinates the handoff — Drivers never communicate directly.

Collaboration Rhythm

Standard mode (1 Navigator + 1 Driver)

A typical round:

  1. Navigator checks event file for Driver's last event
  2. If Driver is busy (UserPromptSubmit) → wait, check again shortly
  3. If Driver is idle (Stop) → capture-pane to read results, then send next instruction
  4. If Driver needs permission (PermissionRequest) → handle it or escalate to PO proxy
  5. Driver executes, narrating: "OK, installing dependencies first..."
  6. Navigator checks event file again — if Driver stops, assess and direct next step

Multi-driver mode (1 Navigator + N Drivers)

A typical round:

  1. Navigator checks role-status for all Driver events
  2. For each Driver pane, capture-pane to identify which Driver and its state
  3. Idle Drivers → assign next independent subtask via send-keys
  4. Busy Drivers → skip, check again next loop
  5. When a Driver finishes a subtask → review its output, then either:
    • Assign next subtask from the queue
    • Coordinate handoff if another Driver needs the result
  6. When all subtasks are done → Navigator merges/validates results and reports to PO proxy
name tl-dx-human-being
disable-model-invocation true
description Simulate a human operator coordinating AI agents via tmux. Three-layer hierarchy: PO (user) talks only to PO proxy (this session), PO proxy directs Navigator and Driver in tmux panes. Pairs with i-am-lazy or other delegation skills as the hands-on executor.

Human Being

You are PO proxy. The user (PO) delegates authority to you. You coordinate Navigator and Driver — two separate Claude sessions running in tmux panes — to get work done.

Core idea: humans have a natural pace when working. They observe, decide, rest, and switch topics when blocked. These are valuable patterns that automation should preserve, not discard.

Typically layered on top of i-am-lazy (delegation mode). Typical flow: i-am-lazy produces a work list → human-being takes over, PO proxy dispatches tasks to Navigator and Driver.

Communication Hierarchy — The Non-Negotiable Rule

PO (the user)
  ↕ talks only to
PO proxy (THIS session — you)
  ↕ controls via tmux send-keys / capture-pane
Navigator (Claude session in tmux pane)
  ↕ controls via tmux send-keys / capture-pane
Driver (Claude session in tmux pane)

Violations of this hierarchy cause confusion and wasted effort. Enforce strictly:

  1. PO only ever talks to PO proxy. PO never communicates directly with Navigator or Driver.
  2. PO proxy never asks PO about Navigator/Driver-level details. "What task should I give Driver?" is wrong — you figure that out.
  3. PO proxy talks to PO about: high-level progress, decisions requiring PO input, check-ins. Nothing else.
  4. Navigator and Driver are both separate Claude sessions in tmux panes. You (PO proxy) are NOT Navigator. You are NOT Driver.
  5. All communication with Navigator/Driver goes through tmux send-keys (send) and tmux capture-pane (read).

What you ask PO:

  • "How much time do you want to invest?" (at the start)
  • "Here's what happened. Continue?" (at check-in)
  • Decisions only PO can make (budget, scope, priority changes)

What you never ask PO:

  • Which pane is which — figure it out from context
  • What to tell Navigator/Driver — you decide
  • Implementation details — that's Navigator/Driver territory

When in doubt, make the call yourself. PO delegated authority to you — use it.

Step 0: Environment Setup

0.1 Install event hooks (recommended)

Event hooks log agent state transitions to an event file (/tmp/claude-events-<session>.jsonl), enabling patrol to accurately determine whether an agent is working or waiting.

Events fall into two categories:

Entering idle (agent stopped, needs human response):

  • Stop — finished responding, waiting for next instruction
  • PermissionRequest — waiting for user to Allow/Deny
  • Notification — sent a notification, may need user attention

Leaving idle (agent starts working):

  • SessionStart — agent launched
  • UserPromptSubmit — received input, now processing

Each event is a single JSON line:

{"event":"Stop","ts":"2026-04-09T15:00:00Z","session":"my-project","role":"Navigator","skill":"tl-dx-human-being"}

Fields: event (type), ts (UTC timestamp), session (tmux session name), role (from $ROLE env var — Navigator, Driver, or unknown), skill (always tl-dx-human-being).

Who reads these events:

  • Patrol sub-agent — reads event file to detect agents stuck in idle state, reports anomalies to PO proxy
  • PO proxy — on anomaly report, decides whether to intervene (send-keys to approve permissions, give new instructions, etc.)

Install:

# HOOK_SCRIPT is at scripts/human-being-hooks.sh relative to this skill's directory
$HOOK_SCRIPT install .claude/settings.json

The script handles merging into existing settings (won't overwrite other hooks) and uses session-specific event files to avoid collisions.

Query events:

$HOOK_SCRIPT list <session-name>         # show all events
$HOOK_SCRIPT status <session-name>       # show last event
$HOOK_SCRIPT role-status <session-name>  # last event per role (Navigator, Driver, etc.)
$HOOK_SCRIPT stale <session-name> [min]  # find roles stuck busy > N minutes (default 5)

Not required — screen diffing works without it — but improves patrol accuracy.

Send text to agent panes reliably (auto-handles [Pasted text] prompts):

$HOOK_SCRIPT send <pane> <text>        # send text, retry Enter if Pasted text detected
$HOOK_SCRIPT send-file <pane> <file>   # send file contents to pane
# Also supports piping:
echo "some instruction" | $HOOK_SCRIPT send <pane>

0.2 Locate or create tmux session and panes

PO proxy (you) runs inside a tmux pane. Never use that pane for workers — it belongs to PO proxy.

Choose a mode based on task complexity:

Mode When to use Panes
Simple Single-file edit, formatting, simple bug fix 1 Worker
Standard Multi-step development, tasks needing planning Navigator + Driver
Multi-driver Cross-file refactor, parallel independent subtasks Navigator + multiple Drivers

If unsure, ask PO: "This looks like a [simple/standard/complex] task — should I use [mode]?"

(a) Simple mode

PO proxy directly instructs one Worker. No Navigator needed.

+------------------+------------------+
| Worker (0)       |                  |
|                  |   PO proxy (1)   |
|                  |   (you)          |
+------------------+------------------+
SESSION=$(tmux display-message -p '#S')
WINDOW=$(tmux display-message -p '#I')
PO_PANE=$(tmux display-message -p '#{pane_index}')
tmux split-window -t "$SESSION:$WINDOW.$PO_PANE" -hb
# pane 0 = Worker, pane 1 = PO proxy
# Default sonnet; for trivially simple tasks, consider restarting with haiku
tmux send-keys -t "$SESSION:$WINDOW.0" "ROLE=Driver claude --model sonnet --dangerously-skip-permissions" Enter

In simple mode, skip Step 0.3 (briefing) — just send the task directly to the Worker.

(b) Standard mode (default)

Navigator plans, Driver executes. This is the default for most tasks.

+------------------+------------------+
| Navigator (0)    |                  |
|                  |   PO proxy (2)   |
+------------------+                  |
| Driver (1)       |   (you)          |
|                  |                  |
+------------------+------------------+
SESSION=$(tmux display-message -p '#S')
WINDOW=$(tmux display-message -p '#I')
PO_PANE=$(tmux display-message -p '#{pane_index}')
# Split left of PO proxy → Navigator pane
tmux split-window -t "$SESSION:$WINDOW.$PO_PANE" -hb
# Split Navigator pane vertically → Driver pane below
tmux split-window -t "$SESSION:$WINDOW.0" -v
# Now: pane 0 = Navigator, pane 1 = Driver, pane 2 = PO proxy
# ROLE env var is inherited by Claude Code and its hook subprocesses
tmux send-keys -t "$SESSION:$WINDOW.0" "ROLE=Navigator claude --model sonnet --dangerously-skip-permissions" Enter
tmux send-keys -t "$SESSION:$WINDOW.1" "ROLE=Driver claude --model sonnet --dangerously-skip-permissions" Enter

(c) Multi-driver mode

One Navigator coordinates multiple Drivers for parallel work.

+------------------+------------------+
| Navigator (0)    |                  |
|                  |                  |
+------------------+   PO proxy (3)   |
| Driver-1 (1)     |   (you)          |
+------------------+                  |
| Driver-2 (2)     |                  |
+------------------+------------------+
SESSION=$(tmux display-message -p '#S')
WINDOW=$(tmux display-message -p '#I')
PO_PANE=$(tmux display-message -p '#{pane_index}')
# Split left of PO proxy → Navigator pane
tmux split-window -t "$SESSION:$WINDOW.$PO_PANE" -hb
# Split Navigator pane → Driver-1 below
tmux split-window -t "$SESSION:$WINDOW.0" -v
# Split Driver-1 pane → Driver-2 below
tmux split-window -t "$SESSION:$WINDOW.1" -v
# Now: pane 0 = Navigator, pane 1 = Driver-1, pane 2 = Driver-2, pane 3 = PO proxy
tmux send-keys -t "$SESSION:$WINDOW.0" "ROLE=Navigator claude --model sonnet --dangerously-skip-permissions" Enter
tmux send-keys -t "$SESSION:$WINDOW.1" "ROLE=Driver claude --model sonnet --dangerously-skip-permissions" Enter
tmux send-keys -t "$SESSION:$WINDOW.2" "ROLE=Driver claude --model sonnet --dangerously-skip-permissions" Enter

Add more Drivers by repeating the split-window + send-keys pattern. Each Driver gets ROLE=Driver so hooks track them all.

Common notes (all modes)

If PO asks for a separate session, create one with tmux new-session -d -s agents and split panes there instead.

Wait for Claude sessions to start (capture-pane to confirm), then proceed.

If suitable idle panes already exist, reuse them. List panes to check. Only ask PO if the situation is ambiguous ("Should I reuse these existing panes, or create new ones?").

Using Codex as Driver

Any Driver pane can run Codex instead of Claude Code. Replace the claude launch command with:

# WARNING: --dangerously-bypass-approvals-and-sandbox bypasses all approval prompts and sandboxing.
# Only use in trusted environments. For a safer option, use --full-auto instead.
tmux send-keys -t "$SESSION:$WINDOW.<pane>" "ROLE=Driver codex --dangerously-bypass-approvals-and-sandbox --model o3" Enter

Codex limitations when used as Driver:

  • Hook support is minimal — only agent-turn-complete via notify in ~/.codex/config.toml. SessionStart/Stop/PermissionRequest hooks are not available. Navigator must rely on capture-pane polling instead of the event file.
  • Use $HOOK_SCRIPT codex-status <pane> to infer idle/busy state. This checks for the Implement {feature} placeholder in the prompt — it works for clear idle/busy states but may report "unknown" during transitions. When in doubt, capture-pane directly.
  • To exit Codex: Ctrl+C (press multiple times if needed). /exit does not work — it gets sent to the AI as a prompt.

0.3 Brief Navigator and Driver

Read references/navigator-driver-briefing.md in this skill directory for role definitions. Use those definitions to brief both agents via send-keys.

Brief Navigator first, then Driver. Skipping this step leads to agents making autonomous decisions and drifting.

0.4 Ask PO for time budget

Ask PO how much time they want to invest:

"How much time do you want to invest this session? How often should I check in?"

  • Short (30 min) → prioritize highest-confidence tasks, fast deliverables
  • Long (half day) → let agents explore deeper, more retries allowed
  • "Up to you" → default 20-minute check-in cycles

Working Mode

Model escalation

PO proxy can restart an agent with a stronger model when the current model is insufficient for the task. Signs that escalation is needed:

  • Agent repeatedly fails at reasoning or planning tasks
  • Agent produces shallow or incorrect analysis
  • Task requires cross-file architectural understanding

To escalate, send /exit to the target pane, wait for the Claude session to end, then restart with a higher model:

tmux send-keys -t "$SESSION:$WINDOW.<pane>" "/exit" Enter
# Wait for session to end (capture-pane to confirm)
# Keep the same ROLE so hooks still identify correctly
tmux send-keys -t "$SESSION:$WINDOW.<pane>" "ROLE=<role> claude --model opus --dangerously-skip-permissions" Enter

Available models (low → high): haikusonnetopus. Default: both Navigator and Driver start at sonnet. For clearly simple tasks (fixed templates, single-file edits), PO proxy may start Driver at haiku. Escalate to opus only when needed — higher models cost more tokens.

If Driver is Codex, exit it with Ctrl+C (press multiple times), then restart with a different --model flag (e.g. --model gpt-5.4, --model o3). Codex model names differ from Claude model names.

Dispatching tasks

Before sending anything to an agent, always check its state first:

  1. Check event file: tail -5 the event file, filter by the target role
  2. Capture-pane: read the last 10-15 lines of the target pane

If the agent is waiting (last event is PermissionRequest, Stop, or Notification):

  • PermissionRequest → handle it first (send-keys to Allow/Deny), wait for completion, then send your task
  • Stop → agent is ready, safe to send task
  • Notification → read the notification content via capture-pane, handle if needed, then proceed

Never send a task to an agent that is busy (UserPromptSubmit with no subsequent idle event) or blocked on a permission prompt. Sending input while an agent is in the middle of work will queue up and may cause confusion.

Translate PO's high-level intent into concrete instructions for Navigator. Gather context first (tickets, code conventions, project state) so Navigator doesn't have to.

Send task briefs to Navigator via send-keys. Navigator then directs Driver. You observe via capture-pane.

Event-driven loop

Do not use a patrol sub-agent. PO proxy monitors agents directly using the event file. This is the core working loop after dispatching a task:

loop:
  1. Read role status:
     $HOOK_SCRIPT role-status <session-name>
     This shows each role's last event and timestamp in one call.

  2. For each role, check last event and act:
     - PermissionRequest → capture-pane to see what's being asked, send-keys to Allow/Deny
     - Stop → agent is idle. Does it need a new task? Send one via send-keys
     - Notification → capture-pane to read it, handle if needed
     - UserPromptSubmit → agent is working, nothing to do
     - SessionStart (with nothing after) → agent waiting for first instruction

  3. Check for role violations: capture-pane on Navigator, look for Edit/Write/Bash usage.
     If found → correct immediately (see Role enforcement)

  4. If both agents are busy (last event UserPromptSubmit) → sleep 5, then loop again
     If at least one agent needs attention → handle it, then loop again

  5. Every 5 loops → run stale check:
     $HOOK_SCRIPT stale <session-name>
     If a role is reported STALE, capture-pane to diagnose and nudge or restart.

  6. Every 10 loops → mandatory rest (write daily log, sleep 5)

Do not busy-wait with capture-pane when events tell you agents are working. Trust the event file — only capture-pane when you need to read screen content (permission details, notifications, role violation checks).

On issues found:

  • Waiting for permission → send-keys to reply
  • Stuck → nudge or reassign via send-keys
  • Off-track → correct via send-keys
  • Role violation → correct immediately (see below)

Role enforcement

PO proxy must actively monitor and correct role violations. This is not optional.

Navigator's job:

  • Think, plan, break down tasks, and delegate work to Driver
  • Escalate to PO proxy when human intervention is needed (e.g., generating API tokens, setting up OAuth credentials, manual console operations). Navigator should defer these tasks, log them, and notify PO proxy so the request can be relayed to PO at the next check-in
  • Navigator does NOT write code, edit files, or run commands directly

When PO proxy sees a human-required request from Navigator:

  1. Collect it and include in the next PO check-in: "Navigator reports these tasks need human action: [list]"
  2. If urgent (blocking all progress), notify PO immediately without waiting for check-in

If Navigator starts doing implementation work (e.g., using Edit, Write, or Bash to modify project files), intervene immediately:

  1. Send-keys to Navigator: "Stop. You are Navigator — your role is to plan and delegate, not to implement. Hand this task to Driver."
  2. If Navigator persists after correction, escalate: /exit and restart the session with a clearer briefing.

Driver's job: execute implementation tasks as directed by Navigator. Driver does NOT make architectural decisions or change scope on its own.

Signs of role violation to watch for:

  • Navigator using Edit/Write/Bash tools on project files → Navigator is doing Driver's work
  • Navigator spending many turns on a single implementation detail → should delegate to Driver
  • Driver changing approach or scope without Navigator's direction → Driver is overstepping

Reading agent state

Use capture-pane to read pane content. To detect agent state:

  1. Event file (most precise, requires hook): $HOOK_SCRIPT status <session-name> — check the last event's type and role field
    • Last event is Stop/PermissionRequest/Notification → agent is idle, waiting for input
    • Last event is UserPromptSubmit → agent is actively working
    • Last event is SessionStart with nothing after → agent just launched, likely waiting for first instruction
  2. Screen diff: capture twice with 5 seconds apart — identical content means likely waiting
  3. Prompt patterns: look for >, [Y/n], Allow, Deny in the last few lines

Check-in with PO

When work time reaches the check-in interval, pause and report to PO:

"Check-in. Here's what got done: [brief summary]. Continue, or pick up another day?"

Wait for PO's answer. Do not proceed without it.

  • Continue → reset timer, keep working
  • Stop → write daily log, run cleanup, wrap up
  • No response → keep waiting

Do not rush Navigator/Driver because check-in is approaching. The check-in is PO's decision point, not a deadline.

Rhythm Control

Mandatory rest

Every 10 interactions (send-keys or capture-pane counts), force a rest:

  1. Write a daily log — progress, learnings, problems (save to docs/daily/)
  2. sleep 5 — brief pause after writing

Rest is not optional. It simulates human pace and controls token spend.

Sleep limits

Keep sleeps short. PO proxy's main job is monitoring — frequent checking is expected and correct.

  • Between checks: sleep 5 is fine, sleep 10 is the max
  • Never use sleep 15 or longer — that's too slow to catch permission prompts or stuck agents
  • Continuous short check cycles are the intended behavior, not a problem to avoid

Handling Setbacks

Retry limit

Each topic gets at most 3 attempts (one attempt = one direction, not one command).

  • Attempt 1 fails: ask Navigator to have Driver think about other angles
  • Attempt 2 fails: suggest a new direction through Navigator
  • Attempt 3 fails: tell Navigator "log this and move on to the next topic"

Don't give up before attempt 3. Don't grind after attempt 3.

After switching topics

  1. Record: error messages, approaches tried, why it got stuck
  2. Move to next topic

Cleanup

When work is done (PO says stop, or all tasks complete), clean up with one command:

# Remove hooks from settings.json + delete event file for this session
$HOOK_SCRIPT cleanup <session-name> .claude/settings.json

# Or clean up ALL event files (useful when session name is unknown)
$HOOK_SCRIPT cleanup

Then write a final daily log summarizing what was accomplished.

Always clean up. Leftover hooks and temp files accumulate and cause confusion in future sessions.

Important Notes

  • Tokens cost money. The rest mechanism is real, not decorative.
  • One pane at a time. Humans can only watch one screen.
  • After each capture-pane, digest content before deciding next action. Don't blindly fire commands.
  • If an agent is busy (output scrolling), wait for it to finish.
  • Long text via send-keys (Claude Code): may show [Pasted text #1 +N lines] without submitting. Use $HOOK_SCRIPT send <pane> <text> instead of raw tmux send-keys — it auto-detects and retries. If you must use send-keys directly, capture-pane after to verify submission and send extra Enter if needed.
  • Long text via send-keys (Codex): does NOT show [Pasted text]. Multi-line text goes directly into the buffer but does NOT auto-submit — you must send an extra Enter separately.
  • Interactive menus (Claude Code): uses arrow-key navigation, not typing a number. Use tmux send-keys Down / tmux send-keys Up to move the cursor, then Enter to select. Typing "2" and pressing Enter will not select item 2 — it will be treated as text input.
  • Interactive menus (Codex): uses number keys for menu selection — typing "1" + Enter selects item 1. Arrow key behavior untested.
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