Name: golang-concurrency
Rating: 84.39999999999999 (1 reviews)
Author: samber

golang-concurrency

Golang concurrency patterns. Use when writing or reviewing concurrent Go code involving goroutines, channels, select, locks, sync primitives, errgroup, singleflight, worker pools, or fan-out/fan-in pipelines. Also triggers when you detect goroutine leaks, race conditions, channel ownership issues, or need to choose between channels and mutexes.

1.00x

Quality

85%

Does it follow best practices?

Impact

78%

1.00x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Evaluation results

100%

Request Metrics Collector

Typed atomics and mutex embedding convention

Criteria

Without context

With context

Typed atomic for request count

100%

No raw atomic functions

100%

Mutex above protected fields

100%

RWMutex for endpoint map

100%

RLock for Snapshot reads

100%

No mutex held during HTTP call

100%

Context cancellation in refresh goroutine

100%

No RLock-to-Lock upgrade

100%

Unexported mutex field

100%

Concurrent test coverage

100%

80%

Plugin Validator Registry

sync.Once initialization and goroutine leak detection

Criteria

Without context

With context

sync.Once or OnceValue used

100%

OnceValue/OnceValues preferred

goleak import

100%

goleak in TestMain

100%

wg.Go() used

Concurrent initialization test

100%

Factory call count check

100%

Thread-safe registry structure

100%

Error propagated from factory

100%

56%

Product Catalog Enrichment Pipeline

Buffered channel documentation and samber/ro pipeline

Criteria

Without context

With context

samber/ro or iterator for transforms

No goroutines for CPU transforms

100%

errgroup.SetLimit for enrichment

errgroup.WithContext used

Buffered channel comment

70%

100%

Context propagated to HTTP

100%

Inactive products filtered

100%

high-value tag applied

100%

Test uses httptest.Server

100%

Repository: samber/cc-skills-golang
Commit: b88f91d

Evaluated: 3 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Request Metrics Collector Plugin Validator Registry Product Catalog Enrichment Pipeline

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