What is xcode-build-fixer?

A tool for applying approved changes that make Xcode builds faster, one logical fix at a time. It measures the build again afterward and reports what changed and whether the result improved.

Use it to implement approved build-setting, script-phase, or source-level Xcode optimizations and verify their effect on build time.

It keeps optimization changes reviewable and prevents unapproved edits while exposing regressions or changes that had no effect.

xcode-build-fixer — Skill for Claude Code and Codex by patrickserrano

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add patrickserrano/lacquer --skill xcode-build-fixer

Clone the repo

git clone --depth 1 https://github.com/patrickserrano/lacquer

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/patrickserrano/lacquer/xcode-build-fixer.svg)](https://agentmods.dev/skills/patrickserrano/lacquer/xcode-build-fixer)

Your own site

<a href="https://agentmods.dev/skills/patrickserrano/lacquer/xcode-build-fixer"><img src="https://agentmods.dev/badge/skills/patrickserrano/lacquer/xcode-build-fixer.svg" alt="Measured on agentmods" height="20"></a>

Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,709 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 95% copy Near-identical to another mod in the catalogue.

Token cost

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	$0.00077	$0.02709
Opus 5	$0.00039	$0.01354
Sonnet 5	$0.00015	$0.00542
Haiku 4.5	$0.00008	$0.00271

Measured 3d ago against content hash c5c4b84274ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

xcode-build-fixer 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 3d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/benchmark_builds.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

95% identical to xcode-build-fixer — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

profiles/ios/skills/xcode-build-fixer/SKILL.md · 221 lines

How it starts

The opening of the file, as written. The whole thing — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Xcode Build Fixer

Use this skill to implement approved build optimization changes and verify them with a benchmark.

Core Rules

Only apply changes that have explicit developer approval.
Apply one logical fix at a time so changes are reviewable and reversible.
Re-benchmark after applying changes to verify improvement.
Report exactly what changed, which files were touched, and the measured delta.
If a change produces no improvement or causes a regression, flag it immediately.

Inputs

The fixer expects one of:

An approved optimization plan at .build-benchmark/optimization-plan.md with checked approval boxes.
An explicit developer instruction describing the fix to apply (e.g., "set DEBUG_INFORMATION_FORMAT to dwarf for Debug").

When working from an optimization plan, read the approval checklist and implement only the checked items.

Fix Categories

Build Settings

Change project.pbxproj values to match the recommendations in build-settings-best-practices.md.

Typical fixes:

Set DEBUG_INFORMATION_FORMAT = dwarf for Debug
Set SWIFT_COMPILATION_MODE = singlefile for Debug
Enable COMPILATION_CACHE_ENABLE_CACHING = YES
Enable EAGER_LINKING = YES for Debug
Align cross-target settings to eliminate module variants

When editing project.pbxproj, locate the correct buildSettings block by matching the target name and configuration name. Verify the change with xcodebuild -showBuildSettings after applying -- FlowDeck has no settings-only inspection equivalent (flowdeck build always performs a real build against a simulator/device destination), so this one call stays raw xcodebuild deliberately.

Script Phases

Fix run script phases that waste time during incremental or debug builds.

Typical fixes:

Add input and output file declarations so Xcode can skip unchanged scripts.
Add configuration guards: [[ "$CONFIGURATION" != "Release" ]] && exit 0 for release-only scripts.
Move input/output lists into .xcfilelist files when the list is long.
Enable Based on dependency analysis when inputs and outputs are declared.

Read the full file on GitHub · 221 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

3d ago First seen · 221 lines · 77 tokens per session scan A c5c4b84274ac

Subscribe to this mod's changes

xcode-build-fixer is a skill published in the GitHub repository patrickserrano/lacquer (3 stars, last pushed yesterday), licensed MIT. It adds 77 tokens to every session and 2,709 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to xcode-build-fixer, differing in 8 lines, and is treated as a copy.

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