The crafting queue must not consume ingredients when a requested craft cannot complete. Finish the simulator so each request updates the inventory atomically and later requests see the correct stock.
Build the implementation in C# under /app, with /app/run.sh as its entry point. Read one JSON request from standard input and write one JSON result to standard output. Input has inventory mapping item names to nonnegative integer counts, recipes mapping names to needs and gives count mappings, and ordered requests naming recipes. Recipe counts must be positive integers; needs and gives may be empty. For each request, craft once if all ingredients are available, consuming needs before adding gives; otherwise skip without mutation. Missing items start at zero. Return success booleans and final inventory sorted by item, retaining zero counts. Reject invalid counts or unknown recipe requests.
Reject inputs that violate an explicit validation rule with exit status 2, no standard output, and {"error":"invalid_input"} on standard error. For valid input, exit with status 0. Keep the implementation reusable for new inputs; it must work offline and must not depend on the example data being the only data it receives.
Repair or replace the unfinished /app/run.sh and add source files under /app. Malformed JSON must use the same invalid-input response. Do not read /tests or /oracle from the application.