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.
npx skills add slavins-co/cellartracker-mcp --skill wine-purchase-evaluatorgit clone --depth 1 https://github.com/slavins-co/cellartracker-mcpWrote 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.
[](https://agentmods.dev/skills/slavins-co/cellartracker-mcp/wine-purchase-evaluator)<a href="https://agentmods.dev/skills/slavins-co/cellartracker-mcp/wine-purchase-evaluator"><img src="https://agentmods.dev/badge/skills/slavins-co/cellartracker-mcp/wine-purchase-evaluator/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.
<a href="https://agentmods.dev/skills/slavins-co/cellartracker-mcp/wine-purchase-evaluator"><img src="https://agentmods.dev/badge/skills/slavins-co/cellartracker-mcp/wine-purchase-evaluator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00099 | $0.02560 |
| Opus 5.5 | $0.00040 | $0.01024 |
| Sonnet 5.5 | $0.00020 | $0.00512 |
| Haiku 4.5 | $0.00010 | $0.00256 |
Grade A, and why
wine-purchase-evaluator 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 322 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Wine Purchase Evaluator
This skill uses preferences from references/preferences.md if available. If no preferences file exists, apply the framework with reasonable defaults and ask the user about their specific constraints.
This skill provides a rigorous, storage-aware framework for evaluating wine purchases with a focus on educational value, quality-to-price ratio (QPR), and cellar discipline.
Core Philosophy
Default stance: PASS
Every wine must earn its place against:
- Limited storage (fridge + cabinet + racks)
- Budget constraints
- Your learning priorities
- Existing cellar inventory
Guiding principles:
- Discipline beats curiosity
- Rotation beats accumulation
- Learning value trumps status/prestige
- True market price matters, not claimed retail
- Half bottles are educational dead-ends
- Known producers over marketing hype
Evaluation Workflow
1. Auto-Detect Evaluation Type
Determine evaluation mode from input:
Single Wine (most common):
- Input: Wine name + price + retailer
- Output: Tight format (verdict, bullets, scores)
- Example: "Domaine Besson Chablis Vaillons 1er Cru 2022 $30 LastBottle"
Multiple Wines:
- Input: Multiple wines in one message or batch format
- Output: Table format with summary
- Example: Screenshot with 5+ wines, CSV, or list
Marathon Mode:
- Input: Explicitly mentioned "marathon" or flash sale context
- Output: Rapid-fire tight format with stricter thresholds
- Apply heightened discipline and budget awareness
2. Check Cellar Inventory
ALWAYS attempt to reference current cellar inventory.
Use the MCP search-cellar tool if available. Otherwise, look for uploaded CSV files (e.g., CurrentWineCollection*.csv or List_latest.csv).
If inventory not available:
- Proceed with evaluation
- Note in output: "[Cellar inventory not checked - data not available]"
- Still apply general redundancy logic based on stated categories
Use inventory to flag:
- Direct duplicates (same producer, wine, vintage)
- Category redundancy (e.g., "You have 4 Napa Cabs already")
- Producer overlap (e.g., "You own 2 other Ridge wines")
- Style saturation (e.g., "Your Champagne slots are full")
What ships with it
2 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.
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.
- 1mo ago First seen · 322 lines · 99 tokens per session scan A 1b845d3b8e7b
wine-purchase-evaluator is a skill published in the GitHub repository slavins-co/cellartracker-mcp (7 stars, last pushed 3d ago), licensed MIT. It adds 99 tokens to every session and 2,560 once invoked, about $0.0004 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.
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