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Top AI Repos tracks AI repositories on GitHub and answers two different questions about each one: is it moving right now, and would you bet a product on it.
Top AI Repos tracks AI repositories on GitHub and answers two different questions about each one: is it moving right now, and would you bet a product on it.
An Agent Skill helping you to optimize Xcode incremental and clean builds by running benchmarks and optimizing build settings.
| Date | Stars |
|---|---|
| 2026-07-31 | 1191 |
| 2026-08-03 | 1192 |
| 2026-08-06 | 1192 |
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<a href="https://www.rocketsim.app"><img src="assets/xcode-build-optimization-banner.jpg" alt="Xcode Build Optimization Agent Skills - Monitor your build performance with RocketSim" /></a>
# Xcode Build Optimization Agent Skills
Open-source Agent Skills for benchmarking and optimizing Xcode build performance across clean builds, incremental builds, compile hotspots, project settings, and Swift Package Manager overhead.
## Quick Start
Install all six skills (the orchestrator needs the specialist skills to work):
```bash
npx skills add https://github.com/avdlee/xcode-build-optimization-agent-skill
```
Then open your Xcode project in your AI coding tool and say:
> Use the /xcode-build-orchestrator skill to analyze build performance and come up with a plan for improvements.
The agent will benchmark your clean and incremental builds, audit build settings, find compile hotspots, and produce an optimization plan at `.build-benchmark/optimization-plan.md`. No project files are modified until you explicitly approve changes.
For long-term monitoring across days, machines, Xcode versions, and teams, use [RocketSim Build Insights](https://www.rocketsim.app/docs/features/build-insights/build-insights/) and [Team Build Insights](https://www.rocketsim.app/docs/features/build-insights/team-build-insights/).
## Every Second Counts
A 1-second improvement on a 30-second incremental build sounds small. At 50 builds a day, that adds up to **3.5 hours per developer per year** -- or **35 hours across a team of ten**.
Most projects have several seconds of easy wins hiding in build settings, script phases, and compiler flags. This skill finds them.
## How It Works
The orchestrator coordinates five specialist skills in a recommend-first workflow. Nothing is modified until you approve.
```mermaid
flowchart LR
Orchestrator --> Benchmark["Benchmark\n(clean + incremental)"]
Benchmark --> Compilation["Compilation\nAnalyzer"]
Benchmark --> Project["Project\nAnalyzer"]
Benchmark --> SPM["SPM\nAnalyzer"]
Compilation --> Plan["Optimization\nPlan"]
Project --> Plan
SPM --> Plan
Plan --> You{{"You review\n& approve"}}
You --> Fixer["Build\nFixer"]
Fixer --> ReBenchmark["Re-benchmark\n& verify"]
```
**Phase 1 -- Analyze.** The orchestrator benchmarks your project, runs the three specialist analyzers, and produces a prioritized optimization plan at `.build-benchmark/optimization-plan.md`. No project files are modified.
> Use the Xcode build orchestrator to analyze build performance and come up with a plan for improvements.
**Phase 2 -- Fix.** Review the plan, check the approval boxes for the items you want, and ask the agent to apply them. The fixer implements only approved changes and re-benchmarks to verify.
> Implement the approved items from the optimization plan at .build-benchmark/optimization-plan.md, then re-benchmark to verify the improvements.
The plan file is your evidence trail -- shareable with teammates, reviewable in PRs, and diffable over time.
## What It Checks
The agent runs [over 40 individual checks](OPTIMIZATION-CHECKS.md) across build settings, project configuration, source code, and package dependencies.
| Check | What the agent looks for | |
|-------|--------------------------|---|
| Build settings audit | Debug/Release/General settings against best practices (compilation mode, optimization level, eager linking, compilation caching) | [Details](OPTIMIZATION-CHECKS.md#build-settings-audit) |
| Script phase analysis | Missing input/output declarations, scripts running unnecessarily, debug/simulator guards | [Details](OPTIMIZATION-CHECKS.md#script-phase-analysis) |
| Compile hotspot detection | Long type-checks, complex expressions, compiler diagnostic flags | [Details](OPTIMIZATION-CHECKS.md#compile-hotspot-detection) |
| Zero-change build overhead | Fixed-cost phases (codesign, validation, scripts) inflating incremental builds | [Details](OPTIMIZATION-CHECKS.md#zero-change-build-oExcerpt of 14,646 characters
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Antoine van der Lee · SwiftLee · Netherlands
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Would you bet a product on this? Bounded 0–100 and slow moving.
matched fp:d8b4c4d4af229187, llm:Topics: agent, agent-skills, agent skill for optimizing Xcode builds; description: 'An Agent Skill helping you to optimize Xcode incremental and clean builds by running benchmarks and optimizing build settings.'
matched fp:d8b4c4d4af229187, llm:Topics: agent, agent-skills, agent skill for optimizing Xcode builds; description: 'An Agent Skill helping you to optimize Xcode incremental and clean builds by running benchmarks and optimizing build settings.'