feat: add ctx hotspots — churn × complexity ranking#4
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Combines git commit churn (via gitutil::churn_since) with indexed complexity metrics into score = normalized_churn * normalized_complexity, min-max normalized over the analyzed set. Supports --since, --limit, --min-churn, --against REF, --by file|symbol, and the global --json flag. Informational command: exits 0 on success, 2 on operational errors (not a git repo, missing index, bad ref). --by symbol approximates a symbol's churn by its file's commit count (documented v1 limitation), and --no-renames means renames reset churn counts. Also extends the GitRepo test helper with commit_all_with_date for testing --since windows, and adds end-to-end CLI tests that index real git fixtures.
# Conflicts: # CHANGELOG.md # docs/json-output.md # src/main.rs
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Summary
PR 3 of 7 in the Quality Intelligence Suite. Stacked on #2 (
feat/quality-foundation) — will be retargeted tomainonce #2 merges; review only the top 2 commits until then.ctx hotspotscommand ranking indexed files (or symbols with--by symbol) by churn × complexity: churn fromgit log --sincehistory, complexity from the index (fan_out*2 + fan_in, same formula as the DuckDB analytics, computed in plain SQLite so it works on Windows builds too).score = minmax(churn) × minmax(complexity); deterministic ordering with documented tie-breaks.--since(default "6 months ago"),--limit,--min-churn,--against <REF>for diff-scoped use, global--json(entries include the top-3 most complex symbols per file as SymbolRefs).--no-renames).--help.Test plan
--since, non-git exit 2 with empty stdout,--by symbol,--min-churn).cargo test(198 green),clippy -D warnings,fmt --check,--no-default-featuresbuild — all clean.🤖 Generated with Claude Code