Timeline editing: double-click or Edit Feature reopens the feature's dialog filled in (model rolled back to it, references highlighted) and rebuilds it in place; history marker drag; drag to reorder with dependency checks; context menu (edit, edit profile sketch, rename, suppress, roll marker here, find in browser, delete with dependents); hover links timeline and geometry; fillet edges and hole positions re-resolve after upstream edits (warnings when moved)

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

ROADMAP.md

@@ -10,7 +10,7 @@ features → parametric timeline) as an open, pure-Rust, agent-drivable applicat
 | Where are we? | **M0 done; M1/M2 in progress.** Sketch with solver, extrude (taper, two-sided, through all), revolve, fillet/chamfer, holes, patterns, mirror, shell, draft, loft, sweep, split, construction planes, parameters that rebuild the timeline, STEP/STL export, desktop app with Fusion-style selection (hover/selected highlights, origin planes, click-to-pick sketch planes, multi-select, window/crossing box selection, animated view cube), CLI, MCP server, oracle harness. |
 | Command parity (SOLID + SKETCH toolbar) | **57 / 291 (20%)** — [docs/parity.md](docs/parity.md) |
 | Fusion oracle | **23 / 29 parts match** Fusion's measurements — [docs/oracle.md](docs/oracle.md) |
-| Tests | 84 (solver, profiles, kernel booleans/blends/measures, expressions, timeline, file formats, camera, engine end-to-end, hostile-input fuzz over every command) |
+| Tests | 85 (solver, profiles, kernel booleans/blends/measures, expressions, timeline, file formats, camera, engine end-to-end, hostile-input fuzz over every command) |
 | Gates | `cargo xtask ci`: fmt, clippy -D warnings, tests, asset attribution, layering — green |
 | Weighted parity estimate | **≈ 5%** of Fusion's Design workspace by importance (sketch + basic solids are the core, but surfaces, assemblies, sheet metal, CAM, drawings are untouched) |
 | Time to a useful alpha (M0–M6) | ≈ **150 agent hours** remain |
@@ -25,7 +25,7 @@ features → parametric timeline) as an open, pure-Rust, agent-drivable applicat
 | M3 | General fillets and chamfers (curved edges, chains, vertex blends) | planned | 30 |
 | M4 | Files: STEP import, mesh import, DXF sketches, 3MF | planned | 16 |
 | M5 | Persistent naming of faces and edges | planned | 20 |
-| M6 | UI depth: selection feedback and origin (done), timeline editing (edit feature, rollback marker, reorder, suppress, re-resolved references), live previews, measure tool, section view, drag-solve | in progress | 24 |
+| M6 | UI depth: selection feedback and origin (done), timeline editing (done: edit feature, history marker drag, reorder with dependency checks, suppress, rename, delete with dependents, re-resolved references), live previews, measure tool, section view, drag-solve | in progress | 16 |
 | M7 | Sweep, loft, rib, web, emboss, thread, coil, pipe | planned | 24 |
 | M8 | Surface workspace | planned | 30 |
 | M9 | Assemblies and joints | planned | 40 |