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Agent skill

Go Context

by cxuu in cxuu/golang-skills

A skill your agent uses when working with context.Context in Go — placement in signatures, propagating cancellation and deadlines, and storing values in context vs parameters.

Apache-2.0Auto-check passedDevelopment

Install Go Context

skills CLI
$ npx skills add cxuu/golang-skills --skill go-context -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install cxuu/golang-skills go-context --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/cxuu/golang-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/go-context .claude/skills/go-context && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
go-context
GitHub stars
170
Token cost
~937 tokens
SKILL.md length
314 words
Files
2 (incl. references)
Skills in repo
20
Repo updated
First seen
Licence
Apache-2.0

At a glance

A skill your agent uses when working with context.Context in Go — placement in signatures, propagating cancellation and deadlines, and storing values in context vs parameters.

  • Works in 4 steps: Function parameters — most explicit and… → Receiver — for data that belongs to the… → Globals — for truly global configuration… → …
  • Working with context.Context in Go — placement in signatures
  • SKILL.md covers Resource Routing, Context as First Parameter, Don't Store Context in Structs and Don't Create Custom Context…, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Go Context is an agent skill from cxuu/golang-skills. Use when working with context.Context in Go — placement in signatures, propagating cancellation and deadlines, and storing values in context vs parameters. Also use when cancelling long-running operations, setting timeouts, or passing request-scoped data, even if they don't mention context.Context directly. Does not cover goroutine lifecycle or sync primitives (see go-concurrency).

Its SKILL.md is about 940 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/PATTERNS.md`).

It sits in Development, covering Async programming. The repository describes itself as: AI Agent Skills for idiomatic, production-ready Go code, distilled from Google, Uber, Community. The licence is Apache-2.0.

When your agent uses it

  • Working with context.Context in Go — placement in signatures
  • Propagating cancellation and deadlines
  • Storing values in context vs parameters
  • Cancelling long-running operations

Example prompts

  • “/go-context”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Function parameters — most explicit and type-safe
  2. Receiver — for data that belongs to the type
  3. Globals — for truly global configuration (use sparingly)
  4. Context value — only for request-scoped data

What it can do on your machine

Read from SKILL.md and the folder at commit 91f0c2e. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are go).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Go Context loads about 937 tokens when it runs, and up to ~2.5k if it reads all its reference files. Until then it costs about 99 tokens; SKILL.md has 314 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~99
When it runs · the whole SKILL.md, loaded when a task matches
~937
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from cxuu/golang-skills at commit 91f0c2e, republished under its Apache-2.0 licence (© cxuu). 314 words, ~937 tokens.

Download SKILL.mdSave it as .claude/skills/go-context/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
go-context
description
Use when working with context.Context in Go — placement in signatures, propagating cancellation and deadlines, and storing values in context vs parameters. Also use when cancelling long-running operations, setting timeouts, or passing request-scoped data, even if they don't mention context.Context directly. Does not cover goroutine lifecycle or sync primitives (see go-concurrency).

Go Context Usage

Compatibility: context has been in the standard library since Go 1.7.

Resource Routing

  • references/PATTERNS.md - Read when deriving contexts, checking cancellation, handling HTTP request contexts, or using typed context-value keys.

Context as First Parameter

Functions that use a Context should accept it as their first parameter:

go
func F(ctx context.Context, /* other arguments */) error
func ProcessRequest(ctx context.Context, req *Request) (*Response, error)

This is a strong convention in Go that makes context flow visible and consistent across codebases.

Don't Store Context in Structs

Do not add a Context member to a struct type. Instead, pass ctx as a parameter to each method that needs it:

go
// Bad: Context stored in struct
type Worker struct {
    ctx context.Context  // Don't do this
}

// Good: Context passed to methods
type Worker struct{ /* ... */ }

func (w *Worker) Process(ctx context.Context) error {
    // Context explicitly passed — lifetime clear
}

Exception: Methods whose signature must match an interface in the standard library or a third-party library may need to work around this.

Don't Create Custom Context Types

Do not create custom Context types or use interfaces other than context.Context in function signatures:

go
// Bad: Custom context type
type MyContext interface {
    context.Context
    GetUserID() string
}

// Good: Use standard context.Context with value extraction
func Process(ctx context.Context) error {
    userID := GetUserID(ctx)
}

Where to Put Application Data

Consider these options in order of preference:

  1. Function parameters — most explicit and type-safe
  2. Receiver — for data that belongs to the type
  3. Globals — for truly global configuration (use sparingly)
  4. Context value — only for request-scoped data

Context values are appropriate for:

  • Request IDs and trace IDs
  • Authentication/authorization info that flows with requests
  • Deadlines and cancellation signals

Context values are not appropriate for:

  • Optional function parameters
  • Data that could be passed explicitly
  • Configuration that doesn't vary per-request

Common Patterns

Deriving Contexts

Always defer cancel() immediately after creating a derived context:

go
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
Checking Cancellation
go
select {
case <-ctx.Done():
    return ctx.Err()
default:
    // Do work
}
Context Immutability

Contexts are immutable — it's safe to pass the same ctx to multiple concurrent calls that share the same deadline and cancellation signal.

  • Goroutine coordination: See go-concurrency when using context for goroutine cancellation, select-based timeouts, or errgroup
  • Error handling: See go-error-handling when deciding how to wrap or return ctx.Err() cancellation errors
  • Interface design: See go-interfaces when designing APIs that accept context alongside interfaces
  • Request-scoped logging: See go-logging when injecting loggers into context or adding request IDs to structured log output

© cxuu, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/go-context of cxuu/golang-skills.

  • SKILL.md
  • references/PATTERNS.md

Open the folder on GitHubat commit 91f0c2e

Compare with similar skills

Go Context next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Go Context compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Go Context this skillcxuu/golang-skills170—~937Automated safety check: PassApache-2.0
YugabyteDB ASH Instrumentationyugabyte/yugabyte-db11k—~4.5kAutomated safety check: PassCustom licence
Mirage VFS Adapter Authoringstrukto-ai/mirage3.7k—~2.5kAutomated safety check: PassApache-2.0
Golang Patternsantoniopaya22/go-rest-template1729 repos~3.5kAutomated safety check: PassNone
Rust Async Patternsdiodeme/Gold-Band14310 repos~3.1kAutomated safety check: PassAGPL-3.0
Swift Concurrencyhenrypldev/react-native-nitro-mlx1003 repos~3.1kAutomated safety check: PassMIT

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More from cxuu/golang-skills

All 20 skills in this repo

  • Go Testing

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Categories

Questions about Go Context

What does Go Context do?

A skill your agent uses when working with context.Context in Go — placement in signatures, propagating cancellation and deadlines, and storing values in context vs parameters. Go Context is an agent skill from cxuu/golang-skills.Context in Go — placement in signatures, propagating cancellation and deadlines, and storing values in context vs parameters.

When should I use Go Context?

Go Context fits situations like: working with context.Context in Go — placement in signatures; propagating cancellation and deadlines; storing values in context vs parameters; cancelling long-running operations.

How do I install Go Context in Claude Code?

Run `npx skills add cxuu/golang-skills --skill go-context -a claude-code`. Or copy the skill folder (skills/go-context in cxuu/golang-skills) into .claude/skills/go-context in your project. Claude Code loads it when a task matches its description.

How do I install Go Context in Codex?

Run `npx skills add cxuu/golang-skills --skill go-context -a codex`. Or copy the skill folder (skills/go-context in cxuu/golang-skills) into .agents/skills/go-context in your project. Codex loads it when a task matches its description.

Can I use Go Context in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add cxuu/golang-skills --skill go-context -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/go-context, .gemini/skills/go-context, .github/skills/go-context and .opencode/skills/go-context in your project.

What does Go Context need to run?

SKILL.md names no scripts, command-line tools or credentials: Go Context is instructions for the agent only.

Does Go Context access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Go Context safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Go Context use?

Go Context is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Go Context use?

About 937 tokens (SKILL.md is roughly 3.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.6k tokens, read only when the agent opens those files.

What are the alternatives to Go Context?

Skills that share tags, products or a category with Go Context: YugabyteDB ASH Instrumentation (yugabyte/yugabyte-db, 11k stars), Mirage VFS Adapter Authoring (strukto-ai/mirage, 3.7k stars), Golang Patterns (antoniopaya22/go-rest-template, 172 stars) and Rust Async Patterns (diodeme/Gold-Band, 143 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Go Context?

cxuu (a GitHub user) maintains it in cxuu/golang-skills, which has 170 GitHub stars. The repository holds 20 skills in this directory. The repository was last updated on June 20, 2026.

Source: cxuu/golang-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.