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 agentmods add instructions/devantler-tech/agent-plugins/agents-mdgit clone --depth 1 https://github.com/devantler-tech/agent-pluginsWhat 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 | $0.04990 | $0.04990 |
| Opus 5 | $0.02495 | $0.02495 |
| Sonnet 5 | $0.00998 | $0.00998 |
| Haiku 4.5 | $0.00499 | $0.00499 |
Grade A, and why
agent-plugins 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 yesterday.
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 — 273 lines — stays where its author put it; the contents beside it link to each section on GitHub.
devantler-tech/agent-plugins
A tool-neutral agent-plugin marketplace
that bundles the curated agent skills from
devantler-tech/agent-skills into category-based plugins. A
single marketplace install works across VS Code, GitHub Copilot CLI, and Claude Code via
two parity-checked manifests. Sibling repo to devantler-tech/agent-skills
(the curated skill index this marketplace draws from).
By design the marketplace is not scoped to skills-only — a plugin may bundle any agent resource (agent skills today; MCP servers and custom agents as they prove out across the supported tools), which is what keeps it a tool-neutral, industry-standard marketplace. The cross-tool capability matrix and the manifest/CI plan for the first non-skill resource are recorded in ADR 0001.
This file is the single canonical instructions file for the repository. It is read natively by GitHub
Copilot, and by Cursor, Codex, and Claude (via CLAUDE.md → @AGENTS.md).
Repository Structure
.claude-plugin/
└── marketplace.json # Claude Code marketplace manifest
.github/
├── plugin/
│ └── marketplace.json # Copilot / VS Code marketplace manifest (kept in parity with the Claude one)
└── workflows/
├── ci.yaml # Runs scripts/validate-manifests.sh + lint-scripts (shellcheck + self-test) + agentskills.io spec per skill
└── update-agent-skills.yaml # Daily gh skill update --all; opens a PR when upstream skills drift
plugins/
└── <plugin>/
├── plugin.json # Portable Copilot / CLI plugin manifest
├── .claude-plugin/
│ └── plugin.json # Equivalent strict Claude marketplace manifest; CI rejects drift
├── agents/ # Optional auto-discovered custom agents (*.agent.md)
├── scripts/ # Optional helpers the plugin's agents call, each with a *.test.sh
├── skills/
│ └── <skill>/SKILL.md # An installed skill copied from upstream, with metadata.github-* provenance
└── resources/ # Optional ancillary, explicitly linked human-consumed assets
scripts/
├── validate-manifests.sh # Manifest + parity + plugin.json + README-table + skill-provenance guard (single source of truth; run locally before pushing)
├── validate-manifests.test.sh # Self-test: PASS a consistent fixture, FAIL each drift scenario the guard catches
├── check-plugin-version-bump.sh # Gate: a plugin whose shipped content changed must move its version
├── check-plugin-version-bump.test.sh # Self-test for the gate above
├── guard-bundled-skill-edits.sh # Gate: refuse a hand-edit to a synced skill tree, naming its upstream
├── guard-bundled-skill-edits.test.sh # Self-test for the gate above
├── bump-plugin-version.sh # Move a plugin's version across all four manifests (the fix the gate points at)
└── bump-plugin-version.test.sh # Self-test for the bump helper
README.md # Human-facing index — the plugin table + per-tool install instructions
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.
- yesterday First seen · 273 lines · 4,990 tokens per session scan A 3d56f3491fd7
agent-plugins AGENTS.md is an instructions file published in the GitHub repository devantler-tech/agent-plugins (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 4,990 tokens to every session, about $0.0249 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.
Other instructions, from other repositories
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
buildNext
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
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, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
Instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
langchain 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.