verify-timer-sync

verify-timer-sync is a skill for Claude Code, Codex from EndlessDev2016/pomodoro-todo-app. It costs 46 tokens per session (1,724 once invoked), scanned A, original, no licence file.

A verification procedure for checking that a server-based timer stays synchronized with the browser. It checks that the timer keeps its state after the browser closes and calculates elapsed time from the server clock.

In plain words
What is it for?
Use it to test timer persistence, server-time calculations, and synchronization behavior.
Why use it?
It helps detect timer errors caused by closing the browser or relying on a device's local clock.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/endlessdev2016/pomodoro-todo-app/verify-timer-sync
Any agent
npx skills add EndlessDev2016/pomodoro-todo-app --skill verify-timer-sync
Clone the repo
git clone --depth 1 https://github.com/EndlessDev2016/pomodoro-todo-app

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.

agentmods badge for verify-timer-sync

README.md
[![agentmods](https://agentmods.dev/badge/skills/endlessdev2016/pomodoro-todo-app/verify-timer-sync.svg)](https://agentmods.dev/skills/endlessdev2016/pomodoro-todo-app/verify-timer-sync)
Your own site
<a href="https://agentmods.dev/skills/endlessdev2016/pomodoro-todo-app/verify-timer-sync"><img src="https://agentmods.dev/badge/skills/endlessdev2016/pomodoro-todo-app/verify-timer-sync.svg" alt="Measured on agentmods" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,724 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00046 $0.01724
Opus 5 $0.00023 $0.00862
Sonnet 5 $0.00009 $0.00345
Haiku 4.5 $0.00005 $0.00172

Measured 3d ago against content hash eab9817e98da, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

verify-timer-sync 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.

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.

.claude/skills/verify-timer-sync/SKILL.md · 142 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 3d ago First seen · 142 lines · 46 tokens per session scan A eab9817e98da

Subscribe to this mod's changes

verify-timer-sync is a skill published in the GitHub repository EndlessDev2016/pomodoro-todo-app (5 stars, last pushed 6mo ago), with no licence file. It adds 46 tokens to every session and 1,724 once invoked, about $0.0002 per session on Opus 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.

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