Xcode Build Optimization Agent Skills is a collection of agent skills that benchmarks and analyzes Xcode clean and incremental builds, compiler hotspots, project settings, and Swift Package Manager overhead. It is for iOS developers who want an AI coding agent to identify build-performance improvements and produce an optimization plan before changes are approved. The catalogue entries provide the skills, instructions, and plugin used for this workflow.
Borrowing it
Nothing to install: this file belongs to AvdLee/Xcode-Build-Optimization-Agent-Skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/AvdLee/Xcode-Build-Optimization-Agent-Skill/main/AGENTS.mdgit clone --depth 1 https://github.com/AvdLee/Xcode-Build-Optimization-Agent-SkillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/avdlee/xcode-build-optimization-agent-skill/agents-md)<a href="https://agentmods.dev/instructions/avdlee/xcode-build-optimization-agent-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/avdlee/xcode-build-optimization-agent-skill/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/avdlee/xcode-build-optimization-agent-skill/agents-md"><img src="https://agentmods.dev/badge/instructions/avdlee/xcode-build-optimization-agent-skill/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00740 | $0.00740 |
| Opus 5.5 | $0.00296 | $0.00296 |
| Sonnet 5.5 | $0.00148 | $0.00148 |
| Haiku 4.5 | $0.00074 | $0.00074 |
Grade A, and why
Xcode-Build-Optimization-Agent-Skill AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Guidance
This is a multi-skill Xcode build optimization repository.
Layout
skills/contains six installable Agent Skills, each with aSKILL.mdentrypoint. Each skill bundles its own scripts, references, and schemas so it works after standalone installation.references/,schemas/, andscripts/at the repo root are canonical copies of the shared support files. Changes to these must be synced into the skill folders that use them (see CONTRIBUTING.md)..claude-plugin/contains plugin and marketplace metadata.
Skills
| Skill | Purpose |
|---|---|
xcode-build-benchmark |
Repeatable clean and incremental build benchmarking |
xcode-compilation-analyzer |
Swift compile hotspot analysis and source-level recommendations |
xcode-project-analyzer |
Build settings, scheme, script phase, and target dependency auditing |
spm-build-analysis |
Package graph, plugin overhead, and module variant review |
xcode-build-orchestrator |
Orchestrator: benchmark, analyze, prioritize, approve, delegate fixes, re-benchmark |
xcode-build-fixer |
Apply approved optimization changes and verify with benchmarks |
Rules
- Wall-clock build time (how long the developer waits) is the primary success metric. Every recommendation must state its expected impact on wall-clock time. If the impact cannot be predicted, say so.
- Cumulative task time from the Build Timing Summary is diagnostic evidence, not proof of wall-time impact. Xcode parallelizes aggressively, so reducing parallel task time may produce zero wait-time improvement.
- Recommend-first by default. Never apply project, source, or package changes without explicit developer approval.
- Benchmark before optimizing. Use
.build-benchmark/artifacts as evidence. - Treat clean and incremental builds as separate metrics.
- The orchestrator (
xcode-build-orchestrator) is the primary entrypoint for end-to-end work. - Each skill bundles its own copies of scripts, references, and schemas for standalone installation. Root-level
scripts/,references/, andschemas/are the canonical copies; keep both layers in sync.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 42 lines · 740 tokens per session scan A 93c765ee33fb
Xcode-Build-Optimization-Agent-Skill AGENTS.md is an instructions file published in the GitHub repository AvdLee/Xcode-Build-Optimization-Agent-Skill (1,258 stars, last pushed 1mo ago), licensed MIT. It adds 740 tokens to every session, about $0.0030 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).