track-and-count

track-and-count is a skill for Claude Code from Borda/vision-delivery. It costs 151 tokens per session (1,170 once invoked), scanned A, original, Apache-2.0.

A guide for following objects through video and producing linked paths, time-in-zone measurements, crossings, or counts. Tracking means keeping the same object's identity across video frames.

In plain words
What is it for?
Defining and evaluating people, vehicle, or object tracking; measuring paths and dwell time; detecting line crossings; and producing identity-based counts.
Why use it?
It separates simple frame-by-frame detection from evidence that an object was tracked correctly over a clip or live stream.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: names the AskUserQuestion tool.

Part of the sentinel plugin — 13 skills, 2 agents, 1 hook, 1 MCP server shipped together

Good fit Defining and evaluating people, vehicle, or object tracking; measuring paths and dwell time; detecting line crossings; and producing identity-based counts.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/borda/vision-delivery/track-and-count
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 Borda/vision-delivery --skill track-and-count
Clone the repo
git clone --depth 1 https://github.com/Borda/vision-delivery

Made for: Claude Code.

Or install sentinel, the plugin that ships this one along with the rest of its 13 skills, 2 agents, 1 hook, 1 MCP server.

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 track-and-count

README.md
[![agentmods](https://agentmods.dev/badge/skills/borda/vision-delivery/track-and-count/github.svg)](https://agentmods.dev/skills/borda/vision-delivery/track-and-count)
Your own site
<a href="https://agentmods.dev/skills/borda/vision-delivery/track-and-count"><img src="https://agentmods.dev/badge/skills/borda/vision-delivery/track-and-count/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 track-and-count

Your own site · 80×15
<a href="https://agentmods.dev/skills/borda/vision-delivery/track-and-count"><img src="https://agentmods.dev/badge/skills/borda/vision-delivery/track-and-count.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 151 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,170 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 $0.00151 $0.01170
Opus 5 $0.00076 $0.00585
Sonnet 5 $0.00030 $0.00234
Haiku 4.5 $0.00015 $0.00117

Measured 9d ago against content hash 9a542d61bc65, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

track-and-count 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 9d 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/track-and-count/SKILL.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Produce identity-linked video events—paths, dwell, crossings, or counts—that pass an independently annotated clip-level gate. A detector that works on isolated frames is necessary evidence, not proof that tracking works.

Platform execution boundary. Read ../../resources/roboflow-platform-lookup.md before any provider-specific search, dataset, training, inference, workflow, device, or deployment action. Use installed official Roboflow skills or current MCP resources only for read-only discovery and sourced action-brief inputs; never invoke provider execution. Sentinel owns event semantics and measured delivery evidence.

Follow ../../resources/fde-methodology.md; apply these video-specific rules.

1. Define the event, source, and action

Inspect representative clips, stream configuration, zones/lines, annotations, and code. Ask only what is missing:

  • Is the decision about occupancy, unique identity, crossing direction, dwell, or a path?
  • What event/action follows, and which miss/false event is worse?
  • Is the source recorded video or live stream, and may frames leave the site?

Route instantaneous “how many are visible?” to detect-and-analyze. For live streams, explain the stable delivery choices—local processing, hosted client, or provider-managed runtime—without claiming current availability or commands; exact setup comes from upstream and final integration from deliver-cv-project.

Freeze before tuning:

Acceptance ID: <session/revision>
Business decision: <action enabled by the video event>
Gold set: <independent clip/event labels, sites/times, adjudicator>
Primary metric and threshold: <event recall/precision/count error/dwell MAE>
Secondary guardrails: <identity switches, false events/hour, latency>
Frozen before baseline: <timestamp and confirmation>
Baseline result (diagnostic only): <not run yet>

2. Freeze event semantics

Record coordinate conventions, line direction, polygon boundary behavior, track start/end, minimum dwell, cooldown, re-entry policy, dropped-frame behavior, and source timestamps. Define whether returning objects count again. These rules must not change after inspecting failures without a new acceptance revision.

Read the full file on GitHub · 96 lines

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. 9d ago First seen · 96 lines · 151 tokens per session scan A 9a542d61bc65

Subscribe to this mod's changes

track-and-count is a skill published in the GitHub repository Borda/vision-delivery (4 stars, last pushed 29d ago), licensed Apache-2.0. It adds 151 tokens to every session and 1,170 once invoked, about $0.0008 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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