• A lot of breaking changes. Since we're not yet at 1.0, can do this with a minor release. Looking at the current gulp/grunt plugins, their versioning will keep them pinned to a compatible and older release until updated
• Improved ES6 support, and added flow/jsx support by switching to babylon
• Completely rewrote alg for traversal and matching
• Added literal matching (previously only identifier and node type matching were available)
• More conservative defaults, including higher default thresholds (30 instead of 15). Since the tool has become commonly used for copy-paste detection, identifier and literal matching are now enabled by default
• Other flags have been renamed or removed
• --matches became --min-instances
• --suppress became --truncate
• --identifiers was dropped, now it's --no-identifiers
• Diffs have been removed since the N-way diff format was confusing, and alternatives are still difficult to read through
• All reporters have been revamped to output all lines rather than diffs
• JSON reporter output has changed