LorenEteval_Furious/Furious/Extensions/AGENTS.md

Bundled extension guidance

• Extensions contains host-shipped plugins that are not proxy runtimes. They register through the same public API and lifecycle as entry-point plugins and receive no private repository, controller, or UI side channel.
• StandardSubscriptionPlugin owns format recognition and decoding only. A decoder returns an immutable neutral SubscriptionResult; profile construction/metadata belongs to SubscriptionImportService, and group reconciliation, request generations, timers, persistence, and post-commit effects belong to the subscription service/repository path.
• Decoder probing is priority-ordered and failure-isolated. Return None when a format does not match, validate the declared result shape, preserve useful names/upstream IDs, and never log a complete payload or link. Current standard formats are linear plain/Base64 share-link envelopes; introduce explicit size/depth/work limits before adding richer recursive or nested formats.
• Keep bundled registration deterministic, side-effect-light, and discoverable in source, wheel, and Nuitka builds. Test format selection/fallback, malformed and secret-bearing input, duplicate occurrence identity, unsupported subscription protocols, registration rollback, and absence of repository/UI mutation during decoding. Evolve this guide with the decoder contract rather than giving bundled formats permanent special treatment.