東方永夜抄 ～ Imperishable Night

Original Japanese TH08 1.00d title screen

TH08 exact source reconstruction progress

This project aims to reconstruct the source code of the original Japanese
東方永夜抄 ～ Imperishable Night version 1.00d executable, with reproducible
binary comparison as the acceptance criterion.

The repository continues the work of
GensokyoClub/th08. Its complete Git
history was imported rather than squashed, preserving the authorship and
contribution record of the original project. New infrastructure and
reconstruction work build on that baseline.

The project remains active reverse-engineering work. Existing source, symbol
mappings, or generated progress artwork must not be interpreted as a new exact
matching percentage without a reproducible report against the target binary.
Current source-presence inventory is generated in
docs/PROGRESS.md and is deliberately labeled separately
from strict exact-match coverage.

Target executable

Supply your own original executable as resources/th08.exe:

Property Required value
Version Original Japanese 1.00d
Size 840,704 bytes
SHA-256 330fbdbf58a710829d65277b4f312cfbb38d5448b3df523e79350b879213d924
PE image base 0x00400000
Entry point 0x004A619E

Localized or patched executables are different binaries and are intentionally
out of scope. The executable and game data are copyrighted assets and are not
included.

python3 scripts/verify-target.py

Build

Initialize the third-party submodules, then create the upstream Visual Studio
.NET 2002/DirectX 8 environment. On Linux or macOS:

git submodule update --init --recursive
./scripts/create_th08_prefix
python3 ./scripts/build.py

The prefix helper uses Wine by default; set WINE before invoking it when a
different compatible runner is required. On Windows, use the upstream setup
script directly:

python scripts/create_devenv.py scripts/dls scripts/prefix
python scripts/build.py

See Build and exact matching for dependency,
build-mode, reccmp, and objdiff details.

Analysis status

The currently available IDA MCP session is attached to TH07. It must not be
used as TH08 evidence. Until an exact TH08 1.00d IDB is open and the metadata
preflight passes, use target-side objdump/llvm-objdump, a correctly imported
Ghidra project, and the inherited upstream mappings. See
IDA and analysis safety.

Project map

Credits and provenance

This continuation exists because of the reconstruction and tooling work by
the contributors to GensokyoClub/th08.
Their commits retain their original author/committer metadata in this
repository. The upstream project also credits @EstexNT for porting its
var_order pragma to MSVC7.

The N0zoM1z0/th07 reconstruction supplies
this repository's workflow, structure, target gates, claims, matching, and
documentation model. GensokyoClub/th06
is adjacent-engine corroboration only; neither reference overrides TH08 target
evidence.

License

Repository code and documentation are provided under the included MIT License.
This does not grant rights to the original game, executable, or game data.