What problem does it solve? Searching a git-committed Fux knowledge index requires knowing which verb, flags, and JSON fields to use, and how to interpret confidence bands so you never cite a document the index cannot actually support. ## Core Features & Use Cases - Ranked document search: Run fux ask for judged candidates with --json --band, or fux find for bare paths to pipe into other tools, with --under, --phrase, and --all filters. - Confidence-aware answers: Read the confidence block (band, answerable, missing) to know when to answer, when to hedge on partial, and when to abstain on weak or none. - Vocabulary gap recovery: Use -q phrasings fused by RRF or write your own --expand passage when the corpus uses different words than the question. - Ranking diagnostics: Use --why, --explain, and the frozen fux lexical baseline to understand why a document ranked or whether config files changed results. - Use Case: A teammate asks "where is the rollback procedure documented?" You run fux ask "rollback procedure" --json --band, get a grounded band with docs/deploy.md and a Rollback procedure heading, and cite it confidently. ## Quick Start Ask the assistant to search the Fux index for how to roll back a release using fux ask with JSON output and the confidence band enabled.