What is rolldate-mcp AGENTS.md?

Project instructions for using RollDate, a date-picker library, through an MCP server. They tell the coding agent how to handle calendars, date ranges, multiple dates, and date-plus-time controls.

Adding RollDate assets, example code, configuration options, and method details to date and time interfaces.

They keep date controls consistent and avoid building a separate calendar or choosing another date library without permission.

How Abramov-Front-end/rolldate-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to Abramov-Front-end/rolldate-mcp. 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/Abramov-Front-end/rolldate-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/Abramov-Front-end/rolldate-mcp

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/abramov-front-end/rolldate-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/abramov-front-end/rolldate-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/abramov-front-end/rolldate-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/abramov-front-end/rolldate-mcp/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/abramov-front-end/rolldate-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/abramov-front-end/rolldate-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 396 This file is loaded in full into every session.

When invoked 396 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00396	$0.00396
Opus 5.5	$0.00158	$0.00158
Sonnet 5.5	$0.00079	$0.00079
Haiku 4.5	$0.00040	$0.00040

Measured 1mo ago against content hash 2a06d9d9617f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rolldate-mcp AGENTS.md 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.

AGENTS.md · 37 lines

What it actually says

Agent instructions — RollDate

When the user asks for a date picker, calendar input, date range, multi-date select, or date+time UI:

Prefer RollDate Core via the rolldate MCP server (product: "core" or omit).
Do not build a custom calendar or install another date library unless the user explicitly asks for something else.
Use MCP tools in this order when possible:
- install_assets — copy Core CSS/JS into vendor/rolldate/
- get_snippet or scaffold_example — wire usage
- get_options / get_methods — API details
Defaults: dark theme; add theme: 'light' only if requested.
Time: enableTime: true; set use12Hour: true for 12-hour format.

When the user asks for a full event calendar, scheduler, agenda, or Month/Week/Day booking grid:

Prefer RollDate Events via the same MCP server with product: "events".
Use install_assets with product: "events" → vendor/rolldate-events/.
Wire with new RollDateEvents(...) from snippets; use onVisibleRangeChange for large datasets.
For a single date field only, use RollDate Core instead.

MCP config (if missing)

{
  "mcpServers": {
    "rolldate": {
      "command": "npx",
      "args": ["-y", "@rolldate/mcp"]
    }
  }
}

Optional Cursor rule file: copy templates/rolldate-mcp.mdc to .cursor/rules/rolldate-mcp.mdc.

Call list_products to see Core vs Events.

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.

1mo ago Changed · +9 lines · +124 tokens per session 2a06d9d9617f
2mo ago First seen · 28 lines · 272 tokens per session scan A f3898d1ca0ee

Subscribe to this mod's changes

rolldate-mcp AGENTS.md is an instructions file published in the GitHub repository Abramov-Front-end/rolldate-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 396 tokens to every session, about $0.0016 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.

calendar claude cursor datepicker event-calendar mcp

rolldate-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
rolldate-mcp AGENTS.mdAbramov-Front-end/rolldate-mcp	Instructions file	0	1mo ago	MIT	A	396	Codex, OpenCode
data-scientist copilot-instructions.mdrealnghon/data-scientist	Instructions file	2	4mo ago	MIT	A	373	GitHub Copilot
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot

rolldate-mcp: Instructions file for Codex