docs: README crediting upstream AutoMark v2.5.3 (Shui Yu), fork by Nacho Replay; info.json 2.5.3-fork1 with source URL; gitignore AGENTS.md

README.md

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+# AutoMark — darktide fork
+
+Quality-of-life extension of **Auto Mark** for Warhammer 40,000: Darktide.
+Auto-Marks enemies for you (ping, Arbites dog, Servo-Skull, Veteran Focus Target) so you can keep aiming instead of juggling ping keys.
+
+## Credits
+
+All core logic and design come from the original [Auto Mark v2.5.3 by Shui Yu](https://www.nexusmods.com/warhammer40kdarktide/mods/736) — go kudos the man.
+This fork — **Nacho Replay** — started as that exact mod and has since grown well beyond upstream. Upstream gets no blame for anything listed below; this fork gets no credit for anything not listed below.
+
+## What this fork adds (vs upstream v2.5.3)
+
+- **360° Marking (`omni_mark`)** — marks come from *all directions*, not just under the crosshair. Implemented by enumerating the game's smart-tag unit registry; enemies behind you are first-class targets.
+  - **Ignore Line of Sight (`omni_mark_ignore_los`)** — sub-option to mark through cover too.
+  - Upstream-style forward-raycast marking is untouched when the option is off.
+- **360° auto-hack** — with `omni_mark` on, the Servo-Skull auto-hack picks the nearest hackable unit anywhere, instead of only HUD markers near your crosshair.
+- **Diagnostics** — with `debug_mode` on, logs what the mod sees and *why* each candidate was rejected (`OMNI-DIAG` / `OMNI-HACK-DIAG` lines, console log only — no on-screen spam).
+- **Silent breed dumper** — refreshes `mods/AutoMark/breed_dump.txt` on every boot so the exception tables can be diffed after game updates.
+- **Menu fixes** — the "Capacitance Retention" thresholds were mislabeled percent with a −1000..1000 range; they're actually compared against remaining ability charges (relabeled, sane range, tooltip rewritten in human).
+
+## Install
+
+```sh
+./install.sh            # rsyncs AutoMark/ into the game's mods/ folder
+GAMEDIR=/some/path ./install.sh
+```
+
+Takes effect on next game start. Settings live under **Options → Mod Options → AutoMark** (requires DMF).
+
+## License
+
+Upstream licensing terms apply; original work remains Shui Yu's.