SalastilandClaude Opus 5.5
1387ed92fb
reaper (the game process subreaper) and the gameoverlayui launchers were missed by the original >8 KB inventory. Proton 9.0-4f and Experimental 11.0-20261001 are pinned for how Steam launches Windows games and for lsteamclient's Steamworks headers (88 SDK versions). Co-Authored-By: Claude Opus 5.5 <[email protected]>
steam (Rust rewrite) — reverse-engineering workspace
Goal: a Linux-only, slimmed-down Steam client (Rust backend, Qt UI) covering only
the Library: login, install/update/download, in-game presence, Steam Chat, and the
steamclient.so ABI that games (native and Proton via lsteamclient) load.
No Store, Community, Market, or embedded-browser features.
Layout
client/snapshot of the official client binaries being studied (gitignored)decomp/generated output (tracked; logs ignored)<dir>_<binary>/src/<Namespace>.c,functions.tsv,strings.tsv— Ghidra pseudo-Cprotos/—.protofiles extracted from steamclient.so;descriptors.pbis a FileDescriptorSet usable directly withprost_build::Config::compile_fdssteamui/— prettified Library UI JS;steamclient_js_api.txtlists theSteamClient.*backend API the UI callsruntime/— Steam runtime binaries:PROVENANCE.tsvmatches every one by SHA-256 to its published .deb;DUPLICATES.tsvmaps identical copies. Only the proprietary NVIDIA Cg toolkit binaries are decompiled here.
SOURCES.tsv— the original source code for every open-source binary, pinned to the exact version (Debian/Valve.dsc, or upstream git tag/commit) with evidenceBINARY_SOURCES.tsv— which source each binary comes from, and how that was establishedsources/— that source code, fetched bytools/sources.py fetch(gitignored, ~20 GB)
Rule: a binary whose exact source version is public is read from sources/, not
decompiled. Decompiled output is kept only for code with no public source (Steam's
own binaries, RAD Miles, NVIDIA Cg, Valve's WebRTC fork, ...) and for libraries whose
version could only be inferred (dav1d, ANGLE, SwiftShader — see BINARY_SOURCES.tsv).
Tools
tools/decompile.sh <bin>...— headless Ghidra analysis + pseudo-C export (decompile_list.sh,decompile_batch.shfor queues/batches; limits inghidra-env.sh)tools/extract_protos.py <bin>... <out>— protobuf descriptor extractiontools/verify_runtime.py— match runtime binaries to published packagestools/sources.py resolve/fetch [--only ID] [--chromium]— pin and download sources
Re-run everything after a client update by re-copying binaries into client/.