gear-message-execution
Use when a builder needs to design or debug Gear message flow, replies, delayed execution, reservations, or waitlist behavior inside a standard Gear/Vara Sails app. Do not use for Vara.eth or ethexe-first work, non-Sails repositories, or broad protocol research.
What this skill does
# Gear Message Execution ## Goal Provide a focused local path for reasoning about message flow and execution behavior in standard Gear/Vara Sails work. ## Inputs - `../../references/gear-execution-model.md` - `../../references/gear-sails-production-patterns.md` - `../../references/gear-messaging-and-replies.md` - `../../references/gear-gas-reservations-and-waitlist.md` - `../../references/scale-binary-decoding-guide.md` - `../../references/sails-syscall-mapping.md` ## Route Here When - replies, timeouts, or error replies are surprising - delayed work spans future blocks - reservations or waitlist behavior affect the design - a builder is mixing raw payload handling into an otherwise standard Sails flow - raw hex, reply bytes, event bytes, or metadata-vs-IDL decoding path is unclear - a reply from a hardcoded non-program `ActorId` does not decode as a Sails route; route to `gear-builtin-actors` for the matching `gbuiltin_*::Response` type ## Working Model 1. Confirm what executes now versus after the next block. 2. If raw bytes are involved, classify the source first: constructor, service payload, reply, event, full state, or state-function output. 3. Determine whether the bytes are Sails-routed, plain SCALE, or metadata-driven state output. 4. Match the decoder artifact to the source: generated client or `.idl`, `ProgramMetadata`, or `state.meta.wasm`. 5. Identify whether the path is fire-and-forget, reply-driven, delayed, or reservation-backed. 6. Separate transport failure, timeout, and error reply. 7. Check whether rollback should revert local state if a send or reply path fails. 8. If the path is in tests, confirm the block-advance pattern and expected reply timing. ## Guardrails - Treat reply, timeout, and late hook execution as distinct states. - Keep staged payload flows paired with their commit step. - Treat reservation duration and waitlist expiry as architecture constraints. - Use `exec::gas_available()` (or `Syscall::gas_available()` if using Sails) when checking available gas during the current execution. - Prefer generated Sails clients unless debugging the route or codec layer. - If a Sails route is involved, expect Sails Header-aware encoding rather than a raw struct payload. - Keep the guidance on the standard Gear/Vara Sails path. - Prefer local repo references over external skill dependencies. - Do not start with plain `Decode::<T>` on arbitrary bytes when a Sails route may be involved. - Match decode artifact to source: generated client or `.idl` for standard Sails interface paths, `ProgramMetadata` for full state, and `state.meta.wasm` for state-function output. - Treat `gear-meta` as a debugging fallback, not the first-choice default path.
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