agentmods.dev

xcodeinstrumentmcp: Skill for Codex

.codex/skills/signposts/SKILL.md

signposts is a skill for Codex from eksdev007/xcodeinstrumentmcp. It costs 71 tokens per session (296 once invoked), scanned A, original, MIT.

Instructions for adding trace markers to Swift code through syntax-aware edits. A trace marker is a small piece of code that helps show what the program is doing.

In plain words
What is it for?
Use it when scanning Swift files, planning or applying trace-marker changes, testing those changes, or reverting them.
Why use it?
It helps make instrumentation repeatable and reversible while protecting code from unsafe or duplicate edits.

Skill for Codex

Written for Codex: installed under .codex/.

This is eksdev007/xcodeinstrumentmcp's own configuration. It tells Codex how to work on xcodeinstrumentmcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything xcodeinstrumentmcp configures →

not rated 2repo 6mo ago A scan 71 tokens original MIT
View source ↗ eksdev007/xcodeinstrumentmcp
Reuse

Borrowing it

Nothing to install: this file belongs to eksdev007/xcodeinstrumentmcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/eksdev007/xcodeinstrumentmcp/main/.codex/skills/signposts/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/eksdev007/xcodeinstrumentmcp

Made for: 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.

agentmods badge for signposts

README.md
[![agentmods](https://agentmods.dev/badge/skills/eksdev007/xcodeinstrumentmcp/signposts/github.svg)](https://agentmods.dev/skills/eksdev007/xcodeinstrumentmcp/signposts)
Your own site
<a href="https://agentmods.dev/skills/eksdev007/xcodeinstrumentmcp/signposts"><img src="https://agentmods.dev/badge/skills/eksdev007/xcodeinstrumentmcp/signposts/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.

agentmods 80×15 button for signposts

Your own site · 80×15
<a href="https://agentmods.dev/skills/eksdev007/xcodeinstrumentmcp/signposts"><img src="https://agentmods.dev/badge/skills/eksdev007/xcodeinstrumentmcp/signposts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 296 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 original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00071 $0.00296
Opus 5.5 $0.00028 $0.00118
Sonnet 5.5 $0.00014 $0.00059
Haiku 4.5 $0.00007 $0.00030

Measured 2mo ago against content hash 12f3fb35843b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

signposts 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 2mo 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.

.codex/skills/signposts/SKILL.md · 36 lines

What it actually says

Signposts

Use this skill for the automatic signpost workflow.

Scope

Swift only. This skill does not apply to Objective-C, C++, or generic text rewriting.

Core rules

  • Syntax-aware rewriting only. Regex rewriting is forbidden.
  • Preserve idempotency: applying the same plan twice must not duplicate instrumentation.
  • Preserve previewability: users must be able to inspect proposed changes before apply.
  • Preserve exact revert paths.
  • Keep inserted code explicit and readable.

Workflow

  1. Start with scan or plan behavior before apply behavior.
  2. Keep the edit plan separate from file mutation.
  3. Make every insertion traceable back to a plan entry.
  4. Ensure revert can remove only tool-authored changes without harming user code.
  5. Add targeted tests for scan, plan, apply, and revert.

Safety checks

  • Do not rewrite files when parse errors make the edit unsafe.
  • Do not insert signposts into generated files unless the spec explicitly allows it.
  • Do not rely on brittle formatting assumptions.
  • Prefer minimal code changes around each insertion point.
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.

  1. 2mo ago First seen · 36 lines · 71 tokens per session scan A 12f3fb35843b

Subscribe to this mod's changes

signposts is a skill published in the GitHub repository eksdev007/xcodeinstrumentmcp (2 stars, last pushed 6mo ago), licensed MIT. It adds 71 tokens to every session and 296 once invoked, about $0.0003 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 2026-08-31.

DebuggingKotlin and SwiftLanguagesinstrumentsiosmcp-serverxcode
Related

signposts compared with skills from other repositories

signposts next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
signpostseksdev007/xcodeinstrumentmcpSkill26mo agoMITA71Codex
xcode-compilation-analyzerAvdLee/Xcode-Build-Optimization-Agent-SkillSkill1.3k1mo agoMITA74Claude Code
ios-expertpersonamanagmentlayer/pclSkill4411d agoApache-2.0A64Claude Code
swift-concurrencypatrickserrano/lacquerSkill54d agoMITA158Claude Code, Codex
swift-concurrencyJordanCoin/ios-skills-collectionSkill61mo agononeA103Claude Code
swift-concurrencythiennc-tesoglobal/ios-skillsSkill31mo agononeA55Claude Code
swift-coding-guidelineJordanCoin/ios-skills-collectionSkill61mo agononeA82Claude Code