Cynthia Andres is co-author, with kent-beck, of the second edition of "Extreme Programming Explained" (xp-explained-second-edition, 2004). Her contribution to the Agile movement is primarily through this collaboration — bringing a perspective on the humanistic and values-based dimensions of XP to the revised edition.
"Extreme Programming Explained" Second Edition
The first edition of XP Explained (1999, xp-explained-first-edition) was Beck's solo work. The second edition (2004) was substantially revised — not merely updated — and the collaboration with Andres was significant to how the revision was shaped. The second edition:
Andres's contribution is generally understood to be in the values framing and the interpersonal/humanistic dimensions of XP — the "respect" value added in the second edition is often associated with her influence.
Movement Role
Andres is a supporting figure in the XP tradition. Her importance is primarily as a collaborator on the definitive revised statement of XP's principles rather than as an independent theorist or practitioner. She represents the perspective that XP's values-based framework is as important as its technical practices — that extreme-programming is fundamentally about how people work together as much as about how they write code.
Gaps
Andres's independent work, speaking, and writing outside of the XP Explained collaboration are not prominent in the major accounts of the Agile movement. Her ongoing involvement in the Agile community after 2004 is not well-documented in available sources.