184 tests lifted from helix-term/tests/test/{auto_pairs, command_line, commands, movement, splits, commands/insert, commands/movement, commands/write, commands/reverse_selection_contents, commands/rotate_selection_contents}.rs at the pinned Helix revision. Adaptations from upstream: - test((...)).await? → test((...)) (fresnel harness is sync). - #[tokio::test(flavor = "multi_thread")] → "current_thread". - The (input, keys, expected, LineFeedHandling::AsIs) 4-tuple maps to our (input, keys, expected, LineFeeds::AsIs). helpers.rs grew an IntoTestCase trait so both 3-tuple and 4-tuple forms work verbatim. - LINE_END constant matches upstream. Ignored tests: 91 total, each with a specific reason. Categories: file I/O commands (:w, :wq, :r) — 35; : command-line prompt — ~20; tree-sitter grammars — ~15; splits — 5; macros — 1; AppBuilder::with_config custom keymaps — 4; one known-failing test (2[<space>u undo edge case) pending investigation. The ignored bucket is the Phase 1 backlog: cargo test -- --ignored prints it. Passing: 93 tests including all 44 non-ignored auto_pairs cases, find_char and find_char_line_ending (which stress on_next_key_callback, just wired), surround_inside_pair / surround_around_pair / test_surround_delete / test_surround_replace / mim / mam / mdm, all non-ignored commands.rs (search, extend, delete, join, paste, duplication), and both rotate_selection_contents variants.