Yeachan-Heo/oh-my-codex · error · Error

`target.value` must be a non-empty string

Error message

`target.value` must be a non-empty string

What it means

The config's target.value (the session name or pane id to target) must be a non-empty string. Whitespace-only strings also fail because of the .trim() check.

Source

Thrown at src/cli/tmux-hook.ts:126

function parseConfig(raw: unknown): TmuxHookConfig {
  if (!raw || typeof raw !== 'object') {
    throw new Error('tmux-hook config must be a JSON object');
  }
  const parsed = raw as Record<string, unknown>;
  if (parsed.enabled !== true && parsed.enabled !== false) {
    throw new Error('`enabled` must be boolean');
  }
  const target = parsed.target;
  if (!target || typeof target !== 'object') {
    throw new Error('`target` is required');
  }
  const targetObj = target as Record<string, unknown>;
  if (targetObj.type !== 'session' && targetObj.type !== 'pane') {
    throw new Error('`target.type` must be "session" or "pane"');
  }
  if (typeof targetObj.value !== 'string' || targetObj.value.trim() === '') {
    throw new Error('`target.value` must be a non-empty string');
  }

  const allowedModes = parsed.allowed_modes;
  if (!Array.isArray(allowedModes) || allowedModes.length === 0 || allowedModes.some(v => typeof v !== 'string')) {
    throw new Error('`allowed_modes` must be a non-empty string array');
  }

  const cooldown = parsed.cooldown_ms;
  const maxInjections = parsed.max_injections_per_session;
  if (typeof cooldown !== 'number' || cooldown < 0 || !Number.isFinite(cooldown)) {
    throw new Error('`cooldown_ms` must be a non-negative number');
  }
  if (typeof maxInjections !== 'number' || maxInjections < 1 || !Number.isFinite(maxInjections)) {
    throw new Error('`max_injections_per_session` must be >= 1');
  }

  const promptTemplate = parsed.prompt_template;
  const marker = parsed.marker;

View on GitHub (pinned to 3ad79a8a6f)

Solutions

1. Set value to a real session name or pane id string, e.g. "%5" or "main-session"
2. Quote numeric ids: "3" not 3
3. Run tmux list-sessions / list-panes to get the exact identifier

Example fix

// before
{"target": {"type": "pane", "value": 3}}
// after
{"target": {"type": "pane", "value": "%3"}}

const v = cfg.target?.value;
if (typeof v !== 'string' || v.trim() === '') throw new Error('bad target.value');

const isNonEmptyString = (v: unknown): v is string => typeof v === 'string' && v.trim() !== '';

try { await loadConfig(); } catch (e) { if (e instanceof Error && e.message.includes('target.value')) fixValue(); }

When it happens

Trigger: "value": "", "value": " ", value set to a number (e.g. pane id 3 without quotes), or the key missing so it is undefined.

Common situations: Numeric tmux pane ids written as JSON numbers instead of strings; empty template placeholders never filled in.

Related errors

• `prompt_template` must be a non-empty string
• `marker` must be a non-empty string
• tmux-hook config must be a JSON object
• `enabled` must be boolean
• `target` is required

AI-assisted analysis of Yeachan-Heo/oh-my-codex@3ad79a8a6f (2026-08-27). Data as JSON: /api/errors/55afe8a362093cee. Report an issue: GitHub.