Ask the store about a game no launcher claims

[corgan2222]

A game bought outside Steam, GOG and Epic — or installed by hand — is in no catalogue on this machine, so it produced no details at all. The executable was the only thing left and it was thrown away.

It now becomes a question:

Executable	Term asked
Cyberpunk2077.exe	Cyberpunk 2077
TheAscent.exe	The Ascent
DOOMEternal.exe	DOOM Eternal
FactoryGame-WinGDK-Shipping.exe	Factory Game
Frostpunk2_x64.exe	Frostpunk 2

The guess is a question, never an answer

This is the only guess in the package, and it is a guess about what to ask. What gets published is the title the store answers with and the id it gave — or nothing at all. Search therefore carries both halves now (Match{AppID, Title}) instead of just the id: where a launcher named the game the launcher's spelling still wins, but where the term came off a file name the store's spelling is the only one anybody checked.

SteamStore already parsed name out of the response and threw it away.

No platform is invented

A game found this way has a title and an id and no platform — none is known. An empty field is left out of every export rather than filled in, which is exactly right: nobody measured it. Its absence is also what distinguishes this case from "GOG named it, the store had no id".

Programs that are never games are not asked about

RTSS hooks whatever presents frames, so browsers, chat windows, capture tools and the launchers themselves turn up here as readily as a game does — and "Origin" would come back as a game called Origin. Those names never leave the machine at all. Generic names (game.exe, launcher.exe) are on the same list for a different reason: they would match something, and whatever they matched would be wrong.

The list is not the safety net — the store's answer is, because a title nobody sells produces no reading. It is there so the names are not sent to somebody else's server in the first place.

Caching is unchanged in shape

Once per term, misses remembered, never waited for. The first poll after a game starts still reports nothing and the id appears on a later one.

Tests

• TestASearchTermIsWorkedOutFromTheExecutable — ten real-world spellings including the three word boundaries that matter (lower→upper, letter→digit, and the all-caps run that DOOMEternal needs).
• TestSomeExecutablesAreNeverWorthAskingAbout
• TestAGameNoLauncherClaimsIsLookedUpByName — asserts the published title is the store's, not the term.
• TestAnUnknownExecutableStaysUnreportedWhenTheStoreHasNothing — five polls, one request.
• TestAProgramThatIsNeverAGameNeverReachesTheStore

TestAPathNoLauncherClaimsIsNotAGame kept its assertions but its comment was rewritten: "no launcher claims it" is no longer why a browser is rejected, and a comment that explains the wrong mechanism is worse than none.

Documentation

game-identification.md and how-values-are-obtained.md, both languages — the third source, what now leaves the machine, and the new "title and id but no platform" case under Missing rather than guessed.