Configuring R8 For Compose

Q: What is a Claude Code skill and how does the Configuring R8 For Compose skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Configuring R8 For Compose is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: mobile · Last updated: 2026-05-27

Use this skill to configure R8 correctly for a Jetpack Compose application — full mode by default, `proguard-android-optimize.txt`, resource shrinking on, and minimal keep rules because Compose ships consumer ProGuard rules. Covers AGP 8.0+ R8 full mode default, R8's Compose-aware optimizations (lambda grouping, `sourceInformation()` stripping, composable arg constant-folding, `ComposerImpl` devirtualization), legitimate keep needs (`@Serializable`, Hilt entry points, reflective `Saver`s), and the AGP 8.x missing-rule reporter / R8 retrace. Cited gain is roughly 75 percent startup and 60 percent frame-render improvement debug-to-release. Use when setting up a new Compose app, when a PR adds an over-broad keep like `-keep class androidx.compose.** { *; }`, when a release build crashes after enabling minification, when APK size needs reduction, or when first enabling minification.

About this skill (catalog notes)

Configuring R8 For Compose includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section); a dedicated installation section; worked examples. At roughly 1,772 words the SKILL.md is on the longer end of the catalog distribution.

License: Apache-2.0
Original author: skydoves
Indexed lastmod: 2026-05-27
Catalog position: Engineering · mobile
Indexed related skills: 10

How Configuring R8 For Compose fits the catalog

Configuring R8 For Compose sits in the Engineering category under the mobile sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

R8 is the only supported shrinker — ProGuard is deprecated. Compose ships consumer ProGuard rules, so most apps need no Compose-specific keep rules. The big modern wins come from R8 full mode (default since AGP 8.0): lambda grouping, sourceInformation() stripping, constant-folding of composable args, and ComposerImpl devirtualization. This skill teaches Claude to set R8 up minimally and refuse over-broad keeps that defeat those wins.

What this skill does

Configuring R8 For Compose is a community-contributed Claude Code skill in the mobile sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/configuring-r8-for-compose/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when setting up a new Compose app, when a PR adds an over-broad keep like `-keep class androidx.compose.

Who uses this skill

The Configuring R8 For Compose Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 93,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/configuring-r8-for-compose
curl -L https://claudskills.com/skills/configuring-r8-for-compose/SKILL.md \
  -o ~/.claude/skills/configuring-r8-for-compose/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/configuring-r8-for-compose/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/configuring-r8-for-compose/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\configuring-r8-for-compose\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Configuring R8 For Compose Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/configuring-r8-for-compose/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Configuring R8 For Compose skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Configuring R8 For Compose skill?

Use Configuring R8 For Compose when your Claude Code task falls under the Engineering category — specifically in the mobile area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Configuring R8 For Compose" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Configuring R8 For Compose skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Configuring R8 For Compose is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/skydoves/compose-performance-skills/blob/HEAD/build/configuring-r8-for-compose/SKILL.md
License: Apache-2.0
Author: skydoves

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

skydoves. (2026). Configuring R8 For Compose [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/configuring-r8-for-compose/

BibTeX

@misc{configuring-r8-for-compose-2026,
  author    = {skydoves},
  title     = {Configuring R8 For Compose [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/configuring-r8-for-compose/}
}

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