Built With REA: The Real GitHub Repos Behind ReaCut, SpeakMore, Battlefield 2 and 5 More

TL;DR: Here are the GitHub repos behind eight projects that credit REA (Reverse Engineer Anything), with each headline claim checked against the code on Oct 21, 2026: ReaCut, SpeakMore, open-obsidian, Open Claude UI, OpenBattlefield2, Creative Destruction Reborn, a WoW Shadowfang Keep slice and Desktop Games. Most of the numbers hold up. Two are off: Open Claude UI ships 33 modules and 194 tokens, not the 30 and 183 its README claims. One REA credit is overstated: in the WoW repo, REA's own report shows its native analysis failed, and the decompiling was done in Ghidra directly.

How to read this: "Confirmed in the repo" means we found it in the code or files, or ran it. "The author says" means it appears only in the README, docs or posts, and we couldn't reproduce it.

REA ("Reverse Engineer Anything", morluto/rea) is an MCP server and CLI. It lets Claude Code, Codex or Cursor drive Ghidra, Hopper, IDA and JavaScript/Electron analyzers. New to it? Start with our REA explainer and the install guide.

Why these showcases matter

REA's official showcase page is small on purpose: one DX-Ball function, Notion's clipboard bridge, a Touhou bullet ring, an Aegis login code and a CTF. The community projects below are whole apps and engines. They show what an agent produces when it starts from a shipped binary. They also show how unevenly authors document what REA actually did.

The eight repos at a glance

Project	Category	Repo	What it does	Stack
ReaCut v0.5.0	App	Xiangyu-CAS/rea-capcut	Offline Mac video editor modeled on Jianying/CapCut	Electron, React, TypeScript, FFmpeg
SpeakMore	App	zephyr4123/speakmore	Open-source voice dictation, Typeless-style	JavaScript (Node), native helpers
open-obsidian	App	JingHao-Leon/open-obsidian	Browser-only, clean-room Obsidian alternative	TypeScript, React, Vite
Desktop UI rebuild	App	Caho1/open-claude-ui	Claude desktop app's design system as components	TypeScript, React, Tailwind
OpenBattlefield2	Game	Moxnatiy/OpenBattlefield2	Clean-room Refractor 2 (BF2) engine	C++20, SDL3, CMake
Creative Destruction Reborn	Game	crasyimperior/creative-destruction-reborn	Local offline server + client mod	Python, Windows
WoW Shadowfang Keep	Game	wubing733-prog/wow-mobile-ios	Single-player dungeon slice, iPhone/Windows	Godot 4.7, GDScript
Desktop Games	Game	ucodia/desktop-games-nostalgia	2000 "Stress Reducers" toy ported to Mac + web	Swift, JavaScript

Star counts are a snapshot from Oct 21 around 08:40 KST. Most of these repos are under two weeks old, so the chart mainly shows which posts went viral.

1. ReaCut: a CapCut-style editor for Mac

Repo: Xiangyu-CAS/rea-capcut · MIT for its own code · first commit Oct 13

• Confirmed in the repo:
  • package.json is at 0.5.1.
  • The v0.5.0 release carries a 194 MB arm64 DMG and a Codex plugin zip.
  • The source has code for chroma key, masks, keyframes, SRT/WebVTT, H.264/AAC export and the .reacut project format, plus a plugin bridge.
• REA's role (partly confirmed): docs/research/REA_FINDINGS.md lists REA 6.4.0 evidence IDs from two steps: an inventory of the installed Jianying app and passive observation of its native UI. Most of the project-format clues come from entries labeled LOCAL-STR-*, which are plain local string scans, not REA output. The draft importer was tested against Jianying 11.0.12922 only, and it's lossy.
• The author says: Windows and Linux builds exist but haven't been tested on real machines.

2. SpeakMore: Typeless, rebuilt in the open

Repo: zephyr4123/speakmore · MIT · v0.12.0

• Confirmed in the repo: "29 models" is correct. We loaded the model catalogs:
  • 7 native audio models (Gemini 1, OpenAI 2, Bailian 4)
  • 4 on-device transcription entries (two model families, each in two runtime formats)
  • 6 cloud transcription models
  • 12 unique polishing models (13 vendor rows; DeepSeek V4 Pro is offered twice)
• Also confirmed:
  • targets/typeless/docs holds 18 analysis notes, citing 53 unique REA evidence IDs.
  • REA's skill files sit in .claude/skills/.
  • The package targets both macOS and Windows.
• Partly confirmed: "no Typeless code" holds in the sense that we found no Typeless endpoints in src/. But protocol.mjs says its message and field names "copy the Typeless capture results." Window sizes and level-meter rules are also matched to the original. It's a behavioral clone, not a fresh design.
• The author says: the Mac build is Developer ID signed and notarized. Signing scripts exist, but we didn't check the binary.

3. open-obsidian: an Obsidian alternative in 74 KB

Repo: JingHao-Leon/open-obsidian · 0 stars · MIT · Oct 14

open-obsidian is a local-first Markdown knowledge base that runs entirely in the browser. It has wikilinks, backlinks, a graph view, tags, properties and a small plugin API of its own design.

• Confirmed by running it:
  • vitest passes 116/116 tests across 7 files.
  • The production build is 74.38 KB gzipped JS, plus 2.89 KB of CSS.
  • The search really is BM25 (k1 = 1.2 in searchIndex.ts).
• The author says: before writing any code, they ran REA statically on Obsidian 1.14.4's app.asar. It found a 13,535-byte main.js with no BrowserWindows and no preload scripts, which is why the project ships without Electron. The run is recorded with an evidence ID in docs/REVERSE_ENGINEERING.md, but we didn't rerun it.

4. Desktop UI rebuild: Open Claude UI

Repo: Caho1/open-claude-ui · 1,286 stars · MIT · created Oct 14

• Numbers don't match the README:
  • "30 modules": there are 33 .ts/.tsx files in code-examples/.
  • "183 design tokens": the repo's own check-tokens.mjs reports 194 --cds-* tokens (220 custom properties in total).
  • Both counts are higher than claimed. The README is out of date, not exaggerating.
• Confirmed in the repo: the "3,000+ line manual" is real. The v1 full manual alone runs 4,610 lines, and docs/ totals about 14,500 lines including a storybook HTML page.
• The author says: REA did the ASAR unpacking and deobfuscation. REA is credited throughout the docs, but only 2 REA evidence IDs appear, so the analysis can't be traced back step by step.

5. OpenBattlefield2: the Refractor 2 engine in C++20

Repo: Moxnatiy/OpenBattlefield2 · 53 stars · MIT (LICENSE file)

Battlefield 2's GameSpy-backed online services shut down in 2014. This engine reads your own BF2 1.5 install and ships no game content.

• Confirmed in the repo:
  • CLAUDE.md has a section called "REA: one function whole, as evidence," and tools/rea.sh exists.
  • There are 55 test_*.cpp files, and network tests replay recorded server captures from tests/data/.
  • Ruffle's Flash bridge is in src/flash.
• The author says: on a live server, "343 of 344 states within 1 mm" of the client prediction. The number appears in the README and CLAUDE.md, but no test asserts it, and reproducing it needs an original dedicated server, which we didn't run.

6. Creative Destruction Reborn: an offline server

Repo: crasyimperior/creative-destruction-reborn · 0 stars · no license file · Oct 13

• Confirmed in the repo:
  • About 1,660 lines of Python: offline_server.py binds to 127.0.0.1 only, there's a nexproto.py protocol module, and protocol.json has 1,532 entries.
  • A client mod is included.
  • It's local single-player, not a public server revival.
  • REA is credited in a single README footer line. There's no REA output in the repo.
• The author says: the official servers closed in June 2022.

7. WoW Shadowfang Keep: less REA than advertised

Repo: wubing733-prog/wow-mobile-ios · 0 stars · no license file

• Confirmed in the repo:
  • The v1.0-ios release .ipa is 68,060,794 bytes, which is 64.91 MiB.
  • GameplayTest.gd defines exactly 9 checks, run with --gametest.
  • The repo contains about 35 MB of Shadowfang Keep assets extracted from the WoW client.
• The author says: 9/9 tests pass on Windows and macOS.
• REA's role was smaller than the label suggests:
  • The repo's own docs/REA-FINDINGS.md shows REA identified Wow.exe, but its native analysis failed (no analysis engine was bound, and a saved run timed out).
  • That report also says REA doesn't support CASC, the client's storage format.
  • The decompiling was done in Ghidra directly (ghidra-scripts/WowStats.java; the author reports 106,399 functions), and the assets were extracted with casclib.
  • "Built with REA + Ghidra" is accurate only in the loosest sense.

8. Desktop Games: one toy, nine tools

Repo: ucodia/desktop-games-nostalgia · 6 stars · no license file · built Oct 9

This is one game, not a collection: the 2000 freeware Stress Reducers by Miroslav Němeček (Gemtree).

• Confirmed in the repo:
  • All nine tools have service routines in the Swift port.
  • The runtime ticks every 55 ms (tickInterval = 0.055).
  • re/ holds the Python decompiler and asset extractor, plus a 1,316-line decompiled program.
  • A browser build and a macOS app are included.
• The author says: REA, with Ghidra underneath, decompiled the Peter interpreter. The repo contains no REA evidence files.

How we checked

All checks were run on 2026-10-21 against shallow clones, the GitHub release API, and two test or build commands run locally.

Claim	Source checked	Status
ReaCut v0.5.0 DMG, v0.5.1 source, listed features	Release API, package.json, src/ grep	Confirmed in repo
ReaCut format research done with REA	REA_FINDINGS.md evidence table	Partly (REA for inventory and UI; strings via local scans)
SpeakMore 29 models	Model and vendor catalogs loaded in Node	Confirmed in repo
SpeakMore 18 Typeless notes, REA skills	targets/typeless/docs, .claude/skills	Confirmed in repo
SpeakMore has no Typeless code	src/ grep	Partly (protocol names copied from captures)
SpeakMore notarized	README	Author only
open-obsidian 116 tests, ~74 KB	vitest run, vite build	Confirmed by running
open-obsidian REA finding (13,535-byte main.js)	REVERSE_ENGINEERING.md	Author only (recorded, not rerun)
Open Claude UI 30 modules / 183 tokens	File count, check-tokens.mjs	Not as stated (33 / 194)
Open Claude UI 3,000+ line manual	wc -l docs	Confirmed in repo
OpenBattlefield2 REA usage	CLAUDE.md, tools/rea.sh	Confirmed in repo
OpenBattlefield2 343 of 344 states	README, CLAUDE.md, tests	Author only
Creative Destruction offline server, REA credit	offline_server.py, README	Confirmed in repo
WoW 64.91 MB .ipa	Release API asset size	Confirmed
WoW 9 gameplay checks / 9/9 pass	GameplayTest.gd / PROGRESS.md	Confirmed / Author only
WoW built with REA	REA-FINDINGS.md	Partly (REA's analysis failed; Ghidra did the work)
Desktop Games 9 tools, 55 ms tick	Swift source	Confirmed in repo
Desktop Games decompiled with REA	README only	Author only

What this shows about AI reverse engineering

• The checkable claims mostly hold up. Test counts, file sizes and model catalogs matched, and two counts were actually higher than the READMEs say.
• REA credit is the weakest link. Only some repos (ReaCut, SpeakMore, open-obsidian, OpenBattlefield2) keep REA evidence IDs or a REA wrapper script. Others credit REA in one line, and in one case the repo's own log shows REA failing.
• Formats and protocols are where it pays off. Draft formats, network messages, asset codecs and timer ticks are what these repos actually recover.
• Scope is narrow. One scene, one ranking function, one offline mode. None of these is a full clone.

Caution: clean-room claims and redistributing extracted assets (as the WoW and Desktop Games repos do) are legal questions that depend on your jurisdiction. Not legal advice.

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