update 2, 2026-09-19

1. Directive 1-2 no longer sits silent after DETONATE; the lesson pauses when the yield settles.
2. Directive 1-2: two-cell relief bore in the gun barrel, and a step that teaches the eraser.
3. Gunpowder no longer fires on its own. Ignition starts at the primer.
4. All campaign directives, the Field Manual, material descriptions, achievements and settings text were rewritten.
5. Field Manual diagrams replaced: seven captures from real shots, four public-domain plates.
6. Settings no longer show window-debugging notes.
7. A challenge finished with RESET now completes.
8. A failed safety-check roll no longer refuses the same drawing until restart. DETONATE re-runs the check.
9. RESET no longer clears the telemetry graphs.
10. Readouts mark thousands with a lowercase k, so 212,000 K no longer prints as 212.0K.
11. The time label on a filling graph sits under the last sample.
12. Releasing the mouse over a side panel no longer breaks drawing, panning or selection.
13. A design whose fissile mass equals the budget exactly is accepted.
14. The Fizzle achievement no longer unlocks on an abandoned run, and unlocks on a real fizzle at once.
15. Saving over an existing name asks first. An empty name no longer locks the field.
16. Leaving an unsaved drawing for Stand FKBN, Campaign or Sandbox asks first.
17. Shape tools gained a fill-empty-cells-only switch.
18. Erasing a placed curve no longer leaves a ghost outline.
19. The curve tool draws about the cell under the cursor.
20. The k warning outline follows the camera.
21. The tutorial pointer no longer lands on the buttons it points at.
22. Workspace columns are chosen from post-zoom width; the rail is no longer clipped at 1920x1080.
23. The resolution list on small displays explains which presets fit and offers borderless.
24. The screen-edge vignette can be turned off.
25. Volume sliders step by 0.01, and the Windows media flyout stays closed while the radio plays.
26. Yield units read t, kt and Mt.
27. Screw heads and grille panels on the tool rack and the radio render.
28. The Safety Interlock warning keeps its buttons on screen.
29. The settings button can no longer be scrolled off the screen.
30. Pasting a design string into the settings import says where it belongs.
31. Critical Mass, First Light and the Proving Ground stamp accept placements up to 3 cells off.
32. First Light pauses at 40 kt instead of a gate the block cannot reach.
33. Space commits a rectangle mid-drag, and the early steps name the shortcut.
34. Loading a mission resets the camera to the gold guide.
35. Directive requirements show placed amounts in kilograms and cells.
36. The Tamper gained a retime-the-generator step and a hint with exact dimensions.
37. A Sandbox design carried into Campaign is refused at DETONATE until its locked materials are removed.
38. Quit to Desktop sits at the bottom of Settings beside Done, without scrolling.
39. Wipe All Data asks twice.