agent-plugins: Instructions file for Codex

AGENTS.md

agent-plugins AGENTS.md is an instructions file for Codex, OpenCode from devantler-tech/agent-plugins. It costs 6,380 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for devantler-tech/agent-plugins, a marketplace of add-ons for coding agents. They describe the repository layout, supported tools, and the two marketplace manifests that must stay aligned.

In plain words
What is it for?
Use them when changing plugin manifests, adding agent resources, checking repository conventions, or working with the related agent-skills source.
Why use it?
They give contributors the rules and structure needed to add or maintain plugins consistently across VS Code, GitHub Copilot CLI, and Claude Code.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions .claude-plugin; mentions CLAUDE.md; mentions Claude Code.

This is devantler-tech/agent-plugins's own configuration. It tells Codex and OpenCode how to work on agent-plugins itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-plugins configures →

Reuse

Borrowing it

Nothing to install: this file belongs to devantler-tech/agent-plugins. 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/devantler-tech/agent-plugins/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/devantler-tech/agent-plugins

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.

agentmods badge for agent-plugins AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/devantler-tech/agent-plugins/agents-md/github.svg)](https://agentmods.dev/instructions/devantler-tech/agent-plugins/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/devantler-tech/agent-plugins/agents-md"><img src="https://agentmods.dev/badge/instructions/devantler-tech/agent-plugins/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.

agentmods 80×15 button for agent-plugins AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/devantler-tech/agent-plugins/agents-md"><img src="https://agentmods.dev/badge/instructions/devantler-tech/agent-plugins/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 6,380 This file is loaded in full into every session.
When invoked 6,380 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.06380 $0.06380
Opus 5.5 $0.02552 $0.02552
Sonnet 5.5 $0.01276 $0.01276
Haiku 4.5 $0.00638 $0.00638

Measured 6d ago against content hash 101ba683e509, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 6d 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 · 358 lines

How it starts

The opening of the file, as written. The whole thing — 358 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
    ├── prepare-marketplace-release.yaml # Manual, read-only release-candidate artifact
    ├── propose-marketplace-release.yaml # Current-main assessment; separate opt-in signed draft creation
    ├── publish-marketplace-release.yaml # Exact-main CI assessment; separate opt-in publication job
    └── update-agent-skills.yaml  # Daily gh skill update --all; one PR per drifted skill
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
    ├── README.md               # What the plugin is today, and its consumer contract
    └── CHANGELOG.md            # Released versions, newest first, incl. per-release upgrade steps
scripts/                        # Validators, gates, writers and their self-tests — the main ones are described in docs/scripts.md
README.md                       # Short introduction and getting started
docs/plugins.md                 # Validated plugin catalogue and resource inventory
docs/installation.md            # Per-tool installation instructions
docs/resources.md               # Bundled servers, agents, and onboarding
docs/marketplace-releases.md     # Opt-in candidate preparation and publication boundary
docs/validation.md              # Every validation command, and how the CI gates behave
docs/scripts.md                 # What each repository script is for

Read the full file on GitHub · 358 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. 6d ago Changed · -172 lines · -2,987 tokens per session 101ba683e509
  2. 8d ago Changed · +9 lines · +153 tokens per session f3b889ce8b60
  3. 9d ago Changed · +11 lines · +221 tokens per session bb42ed2c7ad4
  4. 11d ago Changed · +15 lines · +215 tokens per session 9045bd38a4d0
  5. 12d ago Changed · +45 lines · +681 tokens per session 68ff5faf8ff9
  6. 14d ago Changed · +23 lines · +334 tokens per session 3f2ac4f4dd95
  7. 15d ago Changed · +18 lines · +234 tokens per session 26f7929f29f5
  8. 16d ago Changed · +28 lines · +541 tokens per session fd5a6da9365d
  9. 21d ago Changed · +27 lines · +445 tokens per session 5f531779fe56
  10. 22d ago First seen · 354 lines · 6,543 tokens per session scan A acac83e3d25e

Subscribe to this mod's changes

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 6,380 tokens to every session, about $0.0255 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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