derive-seek-from-progress-flow

derive-seek-from-progress-flow is a skill for Claude Code from maxrave-dev/kotlin-footguns. It costs 93 tokens per session (1,748 once invoked), scanned A, original, GPL-3.0.

A method for detecting when a user scrubs, or jumps, through media playback by comparing playhead movement with elapsed real time. It uses progress events already emitted by the media platforms.

In plain words
What is it for?
It helps identify manual playback jumps in a cross-platform media player, including cases where item or transport events do not report the action.
Why use it?
It works around platforms where the usual seek callback is available only on some systems and is not triggered reliably while dragging the timeline.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the kotlin-footguns plugin — 148 skills shipped together

Good fit It helps identify manual playback jumps in a cross-platform media player, including cases where item or transport events do not report the action.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/maxrave-dev/kotlin-footguns/derive-seek-from-progress-flow
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 maxrave-dev/kotlin-footguns --skill derive-seek-from-progress-flow
Clone the repo
git clone --depth 1 https://github.com/maxrave-dev/kotlin-footguns

Made for: Claude Code.

Or install kotlin-footguns, the plugin that ships this one along with the rest of its 148 skills.

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 derive-seek-from-progress-flow

README.md
[![agentmods](https://agentmods.dev/badge/skills/maxrave-dev/kotlin-footguns/derive-seek-from-progress-flow/github.svg)](https://agentmods.dev/skills/maxrave-dev/kotlin-footguns/derive-seek-from-progress-flow)
Your own site
<a href="https://agentmods.dev/skills/maxrave-dev/kotlin-footguns/derive-seek-from-progress-flow"><img src="https://agentmods.dev/badge/skills/maxrave-dev/kotlin-footguns/derive-seek-from-progress-flow/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 derive-seek-from-progress-flow

Your own site · 80×15
<a href="https://agentmods.dev/skills/maxrave-dev/kotlin-footguns/derive-seek-from-progress-flow"><img src="https://agentmods.dev/badge/skills/maxrave-dev/kotlin-footguns/derive-seek-from-progress-flow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 93 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,748 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 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 5.1 $0.00093 $0.01748
Opus 5 $0.00046 $0.00874
Sonnet 5 $0.00019 $0.00350
Haiku 4.5 $0.00009 $0.00175

Measured 10d ago against content hash 7fdd3ee6ed62, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

derive-seek-from-progress-flow 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 10d 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.

skills/derive-seek-from-progress-flow/SKILL.md · 134 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 10d ago First seen · 134 lines · 93 tokens per session scan A 7fdd3ee6ed62

Subscribe to this mod's changes

derive-seek-from-progress-flow is a skill published in the GitHub repository maxrave-dev/kotlin-footguns (161 stars, last pushed 12d ago), licensed GPL-3.0. It adds 93 tokens to every session and 1,748 once invoked, about $0.0005 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 2026-08-30.

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