last30days-skill is an AI-agent research tool that searches sources including Reddit, X, YouTube, Hacker News, Polymarket, and the web, then combines the results into a short summary. People use it to investigate current topics using signals such as engagement, transcripts, and market odds; the catalogue entries define how supported coding agents run the research workflow.
Borrowing it
Nothing to install: this file belongs to mvanhorn/last30days-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mvanhorn/last30days-skill/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/mvanhorn/last30days-skillWrote 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/instructions/mvanhorn/last30days-skill/copilot-instructions)<a href="https://agentmods.dev/instructions/mvanhorn/last30days-skill/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/mvanhorn/last30days-skill/copilot-instructions/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/instructions/mvanhorn/last30days-skill/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/mvanhorn/last30days-skill/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00260 | $0.00260 |
| Opus 5.5 | $0.00104 | $0.00104 |
| Sonnet 5.5 | $0.00052 | $0.00052 |
| Haiku 4.5 | $0.00026 | $0.00026 |
Grade A, and why
last30days-skill copilot-instructions.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.
What it actually says
This file contains Copilot-specific additions. See AGENTS.md for the shared cross-tool governance layer.
Copilot-specific guidance
Test generation
- Prefer unittest.TestCase for generated tests to match the existing test suite.
- Mock external calls with unittest.mock.patch.
Pull request reminders
Before suggesting a pull request:
- Confirm that pytest passes.
- For changes that belong in the next release notes, add a
changelog.d/<n>.<type>.mdfragment (do not editCHANGELOG.mdor bump version manifests). SeeCONTRIBUTING.md/AGENTS.md§ Changelog and releases and fill the PR template’s Agent disclosure + Relationship sections. - If changes were made anywhere under skills/last30days/, confirm the install copy has been refreshed with:
npx skills add . -g -y
Vendor exclusion zone
- Never suggest changes to skills/last30days/scripts/lib/vendor/.
- Treat skills/last30days/scripts/lib/vendor/ as a no-touch zone.
CI expectations
GitHub CI runs:
- pytest
- ruff
Generated changes should pass both before review is requested.
CLI examples
When suggesting CLI usage examples for safe local testing, default to:
--emit=compact --mock
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 · 39 lines · 260 tokens per session scan A 74eda97fa11a
last30days-skill copilot-instructions.md is an instructions file published in the GitHub repository mvanhorn/last30days-skill (65,589 stars, last pushed today), licensed MIT. It adds 260 tokens to every session, about $0.0010 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 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.