Shackleton AI announced on November 4, 2026 that it had emerged from stealth and raised $5 million in seed funding led by Battery Ventures. The capital will expand the workflows its construction AI agents can manage and accelerate go-to-market efforts. The round also included Brick & Mortar Ventures, Trust Ventures, Correlation Ventures, Motivate Partners, Thayer Investment Partners, Act One Ventures, Brainstorm Ventures and Silence VC, among others. The platform itself launched in June 2026…