M0-DevTools

New tools

• Chest Finder (Chest Tracker style): remembers what was in every chest, barrel, shulker box, hopper, furnace, ... you open, per world and dimension (items inside shulker boxes count too). /finditem <item> lists where it is with distances and highlights the containers through walls with a pointer to the nearest one; /finditem gui (or a keybind) opens a searchable item grid. /finditem forget, /finditem clear. Broken containers are forgotten automatically.
• Freelook: hold Left Alt (or set it to toggle) to look around your player in third person while it keeps facing and walking the same way.
• Tick Controls: keys for vanilla /tick freeze, /tick step <n> and slower tick rates, with a HUD badge while the game is frozen or slowed. Needs permission to run /tick.
• /glow <type|hostile|passive|items|players|all> [color]: client-side glowing outlines for entities; only you see them.
• Status HUD canvas element: armor or held-item durability (percent, remaining or both; vertical or horizontal), active effects with timers that blink before they run out, or a durability alert that only shows when gear is low.

Improvements

• Redstone Timeline: Freeze / Step / "Freeze on change" buttons. "Freeze on change" freezes the game on the next signal change so you can step through it tick by tick.
• /scanblocks <radius> <block> outlines every match in the world for 10 minutes (mined blocks disappear), with a line and HUD arrow to the nearest one; /scanblocks clear.
• /math: variables (/math x = 5*64, ans, px py pz), Minecraft units (3 stacks + 5, 2.5 min, 300 nether) and conversions (3000 in stacks, 1200 ticks in s, px in nether). /math vars, /math clear.
• Command completion: SNBT keys and values in /summon and /data merge (picked by entity type or what you're looking at, using 26.x names like equipment and active_effects), NBT paths in /data get, and common values for item components (/give @s diamond_sword[rarity=).
• Packet Inspector: packet sizes, in/out bandwidth and packets-per-second graphs, a pinned packet type graph, "Most bytes" list and /packets stats. /packets pin, /packets unpin and /packets export are back.
• Module Browser: number settings are sliders; drag, scroll over them (Shift = ×10) or click the value to type one (radius, distance, reach, gamma, zoom FOV, GUI scale, flash alpha).
• Chest Finder: clicking an item in /finditem gui opens a preview of every remembered container holding it (with the whole remembered contents, expandable with +/−, scrollable, with "last seen" ages). Click a container to highlight it for five minutes, or press Enter to highlight them all.
• Chat Highlights: every message is matched under a 50 ms budget. A rule that takes too long (catastrophic regex backtracking) is skipped and logged once instead of freezing the game.
• Automation regex matching uses the same shared time limit helper.
• Config and data files (automation, camera paths, secondary chat, highlights, held light, HUD canvas, HUD tweaks, macro panel/HUD, mob drops, pickup feed, scripting, X-Ray, recent files, ...) are written atomically, so a crash while saving can no longer leave a half-written file.
• Script editor internals split into separate completion, validation, naming and text helpers; Macro Workbench (Automation tab, script highlighting, vanilla HUD preview) split into smaller classes. No behaviour change intended.
• Script editor: restyled to match the mod's theme, Ctrl+E recent files (Ctrl+E, Enter flips back to the previous file), m0 completions show what each helper does, completions use real parameter names.

Fixes

• JavaScript scripts failed with a host access error on the shared engine. Scripts now run on the GraalJS Polyglot API with one shared engine.
• Get Data / Quick Edit SNBT editor: typing did nothing on 26.3 (text input was never started), and resizing the window wiped edits in progress. Both fixed; the path field no longer steals focus on open.
• m0.print (used by the docs and snippets) didn't exist; it now writes to the script console.

Build and project

• docs/module-catalog.md: a module list generated from the module registry by scripts/generate-module-catalog.py.
• Gradle cleanup (duplicate and unused repositories, dead configurations, duplicate loom block) and System.out calls replaced by logger calls.
• CI: current Gradle wrapper validation and setup actions with caching, runs on ubuntu-latest, builds only main and tags (no double builds for PRs), cancels superseded runs, uploads test reports on failure.