SigmaLifting CLI: SigmaLifting CLI helps agents understand strength training data

Most fitness applications suffer from a fundamental tension: they are either too rigid for advanced programming or too bloated for quick data entry. SigmaLifting CLI attempts to solve this by treating strength programming as a data management problem rather than a UI problem. By providing a bridge between XLSX and JSON, it allows program writers to leverage the computational power of spreadsheets while maintaining the structured integrity of a database. The inclusion of percentage-based prescriptions and RPE targets suggests a tool built for the 'science' of lifting, not just a digital notebook. Technically, the most interesting pivot is the integration of 'agentskills.' By exposing the CLI to LLMs like Claude or Codex, SigmaLifting transforms the training log from a static record into a programmable asset. Instead of manually calculating a deload or adjusting weights across a six-week block, a user can theoretically prompt an agent to restructure the JSON data. This removes the friction of manual data entry and puts the focus back on the programming logic itself. The primary strength here is the refusal to lock data. The offline-first, no-account approach is a refreshing departure from the current SaaS trend in fitness tech. However, the barrier to entry is high; this is not for the casual gym-goer. The reliance on a CLI and GitHub-based installation means the target audience is narrowed to the intersection of strength athletes and technical users. Ultimately, SigmaLifting is a utility for the 'power user' of the gym. It is a lean, practical tool for those who find existing lifting apps too opinionated and spreadsheets too fragile. It doesn't try to be a coach; it provides the plumbing for those who already know how to coach.