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

`allowed_modes` must be a non-empty string array

Error message

`allowed_modes` must be a non-empty string array

What it means

The config's allowed_modes field must be an array containing at least one string; it controls which tmux modes (e.g. vi/copy mode) permit injection. Empty arrays, non-arrays, or arrays with non-string entries are rejected.

Source

Thrown at src/cli/tmux-hook.ts:131

  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;
  if (typeof promptTemplate !== 'string' || promptTemplate.trim() === '') {
    throw new Error('`prompt_template` must be a non-empty string');
  }
  if (typeof marker !== 'string' || marker.trim() === '') {
    throw new Error('`marker` must be a non-empty string');

View on GitHub (pinned to 3ad79a8a6f)

Solutions

1. Set "allowed_modes": ["vi"] (array of strings, at least one)
2. Check supported mode names in the docs/help
3. Regenerate config via omx tmux-hook init

Example fix

// before
{"allowed_modes": "vi"}
// after
{"allowed_modes": ["vi"]}

const m = cfg.allowed_modes;
if (!Array.isArray(m) || m.length === 0 || m.some(x => typeof x !== 'string')) throw new Error('bad allowed_modes');

const isStringArray = (v: unknown): v is string[] => Array.isArray(v) && v.length > 0 && v.every(x => typeof x === 'string');

try { await loadConfig(); } catch (e) { if (e instanceof Error && e.message.includes('allowed_modes')) fixModes(); }

When it happens

Trigger: allowed_modes omitted (undefined), set to a single string "vi" instead of ["vi"], an empty array [], or [1, 2].

Common situations: Users writing a scalar where an array is expected; commenting out all modes; templating engines emitting empty lists.

Related errors

• tmux-hook config must be a JSON object
• `enabled` must be boolean
• `target` is required
• `target.type` must be "session" or "pane"
• `target.value` must be a non-empty string

AI-assisted analysis of Yeachan-Heo/oh-my-codex@3ad79a8a6f (2026-08-27). Data as JSON: /api/errors/87a29798ed518351. Report an issue: GitHub.