cli/cli · warning

agent tasks are not supported on this host

Error message

agent tasks are not supported on this host

What it means

ParseFullReference rejects strings that do not match ^(?:([^/]+)/([^/]+))#(\d+)$, i.e. anything that is not exactly OWNER/REPO#NUMBER. Empty input is handled separately ('empty reference'); this branch is for non-empty strings with the wrong shape.

Source

Thrown at pkg/cmd/agent-task/agent_task.go:84

	return cmd
}

// requireOAuthToken ensures an OAuth (device flow) token is present and valid.
// agent-task subcommands inherit this check via PersistentPreRunE.
func requireOAuthToken(f *cmdutil.Factory) error {
	cfg, err := f.Config()
	if err != nil {
		return err
	}

	authCfg := cfg.Authentication()
	host, _ := authCfg.DefaultHost()
	if host == "" {
		return errors.New("no default host configured; run 'gh auth login'")
	}

	if auth.IsEnterprise(host) {
		return errors.New("agent tasks are not supported on this host")
	}

	token, source := authCfg.ActiveToken(host)

	// Tokens from sources "oauth_token" and "keyring" are likely
	// minted through our device flow.
	tokenSourceIsDeviceFlow := source == "oauth_token" || source == "keyring"
	// Tokens with "gho_" prefix are OAuth tokens.
	tokenIsOAuth := strings.HasPrefix(token, "gho_")

	// Reject if the token is not from a device flow source or is not an OAuth token
	if !tokenSourceIsDeviceFlow || !tokenIsOAuth {
		return fmt.Errorf("this command requires an OAuth token. Re-authenticate with: gh auth login")
	}
	return nil
}

View on GitHub (pinned to 0eeec0b92e)

Solutions

1. Use the exact form OWNER/REPO#NUMBER, e.g. acme/widgets#123.
2. If you only have a number, also pass --repo OWNER/REPO.
3. If you have a URL, pass the URL itself; the finder routes by shape.

Example fix

# before
gh pr view "acme#123"  # invalid reference

# after
gh pr view "acme/widgets#123"

var refRE = regexp.MustCompile(`^[^/]+/[^/]+#\d+$`)
func isValidFullReference(s string) bool { return refRE.MatchString(s) }

When it happens

Trigger: Passing '123' (bare number), 'owner#123' (missing repo), 'owner/repo#abc' (non-numeric), 'https://.../pull/123' (URL where a reference was expected), or trailing characters like 'owner/repo#123!'.

Common situations: Users pasting URLs or bare numbers where the CLI documents the OWNER/REPO#N form; scripts concatenating slug and number with the wrong separator.

Related errors

• username cannot be blank
• invalid hostname
• ErrNotFound
• no default host configured; run 'gh auth login'
• task description file cannot be empty

AI-assisted analysis of cli/cli@0eeec0b92e (2026-08-15). Data as JSON: /api/errors/1c4defd36b63a901. Report an issue: GitHub.