Restarting Steam (steam -shutdown + relaunch for the CDP port) suspends any
in-flight game update. Repeatedly interrupting a large update — including
during the commit-to-disk phase — leaves a partially written install that
Steam's "verify integrity" still reports as OK, but the game's anti-tamper
detects and crashes on. This corrupted Age of Empires II DE (deterministic
0xc0000005 at AoE2DE_s.exe+0x29B9E3) once commit 00a08de made the enforcer's
CDP restart actually work and it began bouncing Steam mid-update.
Add steam_update_in_progress() in a new _steam_state leaf module (now the
single source of truth for STEAMAPPS_PATH, shared by game_install and
library_hider without an import cycle). It scans appmanifests for unfinished
download/stage bytes. ensure_steam_debug_port() now raises
SteamUpdateInProgressError (a SteamUnavailableError subclass, so the enforce
loop already skips + retries) and restart_steam() skips, when an update runs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vw1sLrSjDksvH5zjU2RMYB
Krzysztof kuhy Rudnicki
dbc3242c07