go-best-practices

Provides Go patterns for type-first development with custom types, interfaces, functional options, and error handling. Must use when reading or writing Go files.

1.10x

Quality

76%

Does it follow best practices?

Impact

91%

1.10x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Optimize this skill with Tessl

npx tessl skill review --optimize ./data/skills-md/0xbigboss/claude-code/go-best-practices/SKILL.md

Evaluation results

79%

12%

E-Commerce Order Processing Package

Type-first domain modeling

Criteria

Without context

With context

Custom ID types

100%

iota starts at 1

100%

Enum String() method

100%

Functional options

100%

Constructor sensible defaults

100%

Accept interfaces

Return structs

71%

100%

Embedding for composition

100%

Exhaustive switch default error

100%

Error wrapping with %w

37%

Unimplemented returns error

100%

50%

One concern per file

100%

Without context: $0.4307 · 1m 55s · 23 turns · 30 in / 6,168 out tokens

With context: $0.7812 · 3m 22s · 34 turns · 322 in / 10,568 out tokens

96%

Weather Data Aggregator Service

Error handling and context propagation

Criteria

Without context

With context

Error wrapping %w

100%

Error context messages

100%

Switch default error

100%

context.Context parameter

100%

Timeout on external calls

100%

No panic for errors

100%

Unimplemented descriptive error

100%

Avoid package-level mutable vars

100%

Return new values

100%

Value vs pointer receivers

58%

66%

Without context: $0.5066 · 2m 44s · 27 turns · 34 in / 7,868 out tokens

With context: $0.9441 · 4m 9s · 35 turns · 291 in / 14,042 out tokens

100%

16%

Email Notification Service

Configuration, table-driven tests, and structured logging

Criteria

Without context

With context

Config struct

100%

LoadConfig function

100%

Validation returns error

100%

No scattered os.Getenv

100%

Sensible defaults

87%

100%

slog import

100%

Structured log fields

100%

Table-driven tests

100%

Edge case test coverage

44%

100%

Test file naming

100%

Config passed explicitly

100%

Without context: $0.3102 · 1m 53s · 19 turns · 22 in / 5,802 out tokens

With context: $0.6133 · 2m 10s · 30 turns · 35 in / 7,646 out tokens

Repository: NeverSight/skills_feed
Commit: 5342bca

Evaluated: 13 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

E-Commerce Order Processing Package Weather Data Aggregator Service Email Notification Service

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