Build or update a chronology from declared document sources and uploads — dated events extracted, de-duped, and tagged by significance per the matter theory. Use when the user asks to build a chronology or timeline from a production or matter file, says "chron from the production" or "what happened when", or needs a working, statement-of-facts, or witness-specific timeline.
Identify sources in order: user-provided paths this session, default matter folder, declared sources from ~/.claude/plugins/config/claude-for-legal/litigation-legal/CLAUDE.md.
For readable sources: extract dated events. For unreachable sources: note in Gaps.
De-dupe, merge with sources list per event.
Tag significance (🔴/🟡/⚪) per matter theory.
Write ~/.claude/plugins/config/claude-for-legal/litigation-legal/matters/[slug]/chronology.md (or format variant per flag).
If prior version exists: version number increments, diff summary presented to user.
Confirm before finalizing: "Here's what I built. Scan the 🔴 entries — anything I miscalled?"
