In a letter posted online Tuesday, she cites “bullying by colleagues” and an “illiberal environment.”

Bari Weiss, a writer and editor for the opinion department of The New York Times, has resigned from the paper, citing “bullying by colleagues” and an “illiberal environment.”

In a nearly 1,500-word letter addressed to A. G. Sulzberger, the publisher, Ms. Weiss offered a deep critique of Times employees and company leadership, describing a “hostile work environment” where co-workers had insulted her or called for her removal on Twitter and in the interoffice communications app Slack.