Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Write reliable Go code avoiding goroutine leaks, interface traps, and common concurrency bugs.
Write reliable Go code avoiding goroutine leaks, interface traps, and common concurrency bugs.
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
TopicFileConcurrency patternsconcurrency.mdInterface and type systeminterfaces.mdSlices, maps, stringscollections.mdError handling patternserrors.md
Goroutine blocked on channel with no sender = leak forever—always ensure channel closes or use context Unbuffered channel send blocks until receive—deadlock if receiver never comes for range on channel loops forever until channel closed—sender must close(ch) Context cancellation doesn't stop goroutine automatically—must check ctx.Done() in loop Leaked goroutines accumulate memory and never garbage collect
Sending to nil channel blocks forever—receiving from nil also blocks forever Sending to closed channel panics—closing already closed channel panics Only sender should close channel—receiver closing causes sender panic Buffered channel full = send blocks—size buffer for expected load select with multiple ready cases picks randomly—not first listed
Defer arguments evaluated immediately, not when deferred function runs—defer log(time.Now()) captures now Defer in loop accumulates—defers stack, run at function end not iteration end Defer runs even on panic—good for cleanup, but recover only in deferred function Named return values modifiable in defer—defer func() { err = wrap(err) }() works Defer order is LIFO—last defer runs first
Nil concrete value in interface is not nil interface—var p *MyType; var i interface{} = p; i != nil is true Type assertion on wrong type panics—use comma-ok: v, ok := i.(Type) Empty interface any accepts anything but loses type safety—avoid when possible Interface satisfaction is implicit—no compile error if method signature drifts Pointer receiver doesn't satisfy interface for value type—only *T has the method
Errors are values, not exceptions—always check returned error err != nil after every call—unchecked errors are silent bugs errors.Is for wrapped errors—== doesn't work with fmt.Errorf("%w", err) Sentinel errors should be var ErrFoo = errors.New() not recreated Panic for programmer errors only—return error for runtime failures
Slice is reference to array—modifying slice modifies original Append may or may not reallocate—never assume capacity Slicing doesn't copy—a[1:3] shares memory with a Nil slice and empty slice differ—var s []int vs s := []int{} copy() copies min of lengths—doesn't extend destination
Reading from nil map returns zero value—writing to nil map panics Map iteration order is random—don't rely on order Maps not safe for concurrent access—use sync.Map or mutex Taking address of map element forbidden—&m[key] doesn't compile Delete from map during iteration is safe—but add may cause issues
Strings are immutable byte slices—each modification creates new allocation range over string iterates runes, not bytes—index jumps for multi-byte chars len(s) is bytes, not characters—use utf8.RuneCountInString() String comparison is byte-wise—not Unicode normalized Substring shares memory with original—large string keeps memory alive
Struct fields padded for alignment—field order affects memory size Zero value is valid—var wg sync.WaitGroup works, no constructor needed Copying struct with mutex copies unlocked mutex—always pass pointer Embedding is not inheritance—promoted methods can be shadowed Exported fields start uppercase—lowercase fields invisible outside package
go build caches aggressively—use -a flag to force rebuild Unused imports fail compilation—use _ import for side effects only init() runs before main, order by dependency—not file order go:embed paths relative to source file—not working directory Cross-compile: GOOS=linux GOARCH=amd64 go build—easy but test on target
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