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Guidance for tuple struct wrapper APIs that use public named constructors and internal tuple constructors; use when designing newtypes/wrappers, deciding constructor visibility, or documenting public vs internal usage.
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SOC 職業分類に基づく
Error handling conventions for MoonBit projects. Use when designing error types, choosing between abort/fail/raise, writing catch blocks, defining FFI boundaries, or reviewing error handling patterns. Triggers on: error handling, abort, fail, raise, catch, Result, error types, fallible functions, boundary safety, error recovery.
Use when reviewing a MoonBit/Canopy change or pull request before merge and multiple independent review perspectives are useful
Use when writing or reviewing MoonBit code against the `dowdiness/incr` reactive library (v0.14.x+) — building Inputs/Deriveds/ReachableDeriveds, attaching long-lived derived cells with `Watch`/`Observer`, adding microbenchmarks, or wrapping a reactive pipeline in a struct. Catches recurring idiom misses (inside-vs-outside read semantics, GC-anchor `Watch`/`Observer`, `Type::Type` constructor naming, defensive copies).
Use when creating or editing a GitHub PR/issue body, comment, or commit message from a shell, or when writing a grep/rg search pattern — especially if the Markdown or pattern contains backticks, `$()`, `>`, or other shell metacharacters that could be expanded before the tool sees them.
Use when creating, removing, or working across git worktrees or submodules — before force-pushing, before deleting a worktree, after `git worktree add`, when merging or deleting branches with `gh pr merge`/`gh pr close`, when bumping a submodule pointer, when merging a stack of dependent PRs, or when another agent/process may be operating on the same checkout concurrently.
Use when writing MoonBit code involving derive(Debug) on container fields, a trait method whose name matches a callable field, JS-target-only public APIs or JS numeric formatting, `guard` early-exit syntax, package visibility (`pub` vs `pub(all)`) on mutable-container fields, or `moon fmt` touching a comment-only or multi-line closure body — silent-failure compiler/formatter behaviors that `moon check` and `moon fmt` don't flag.
| name | tuple-wrapper-api-style |
| description | Guidance for tuple struct wrapper APIs that use public named constructors and internal tuple constructors; use when designing newtypes/wrappers, deciding constructor visibility, or documenting public vs internal usage. |
.0 access.new, from_array) and avoid exposing .0 in docs or external examples.Type(value) and .0 access for brevity.Frontier, VersionVector, AgentId).pub struct Type(T).pub fn Type::new(), pub fn Type::from_x(...)).Type(value) and value.0..0 in tests only when they are internal package tests; avoid in public API examples.