Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add xiaolai/nlpm/plugin install nlpmWrote 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/xiaolai/nlpm/conventions-claude)<a href="https://agentmods.dev/skills/xiaolai/nlpm/conventions-claude"><img src="https://agentmods.dev/badge/skills/xiaolai/nlpm/conventions-claude.svg" alt="Measured on agentmods" 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 | $0.00091 | $0.06780 |
| Opus 5 | $0.00046 | $0.03390 |
| Sonnet 5 | $0.00018 | $0.01356 |
| Haiku 4.5 | $0.00009 | $0.00678 |
Grade A, and why
conventions-claude 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 8d 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 — 494 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code Conventions
Tool-specific overlay for Claude Code plugin artifacts. Loaded by the scorer and checker when an artifact is classified as Tier 2-Claude (per agents/scorer.md step 3). The universal floor lives in nlpm:conventions; this overlay adds Claude-Code-specific schemas on top.
Primary authoritative sources:
- https://code.claude.com/docs/en/claude_code_docs_map.md
- https://code.claude.com/docs/en/skills.md
- https://code.claude.com/docs/en/hooks.md
- https://code.claude.com/docs/en/plugins.md
- https://code.claude.com/docs/en/plugins-reference.md
- https://code.claude.com/docs/en/sub-agents.md
- https://code.claude.com/docs/en/settings.md
- https://code.claude.com/docs/en/memory.md
- https://code.claude.com/docs/en/commands.md — built-in commands + bundled skills (successor to the retired
slash-commands.md) - https://code.claude.com/docs/en/tools-reference.md — authoritative built-in tool catalog (see §16)
- https://code.claude.com/docs/en/plugin-marketplaces.md
- https://code.claude.com/docs/en/workflows.md
1. .claude-plugin/plugin.json
The plugin manifest.
Required fields:
name— string, kebab-case, unique identifier
The manifest is fully optional — artifacts auto-discover from conventional paths, and only name is required when present. Unrecognized top-level fields are ignored with a warning (error only under claude plugin validate --strict).
Optional fields:
version— semver string (e.g."0.1.0"). If omitted, commit SHA is used (every commit = new version). For stable releases, set explicit semver.description— one-line summarydisplayName— human-readable name shown in installer UI (v2.1.143+)author— object:{ "name": "...", "email": "...", "url": "..." }homepage— URL stringrepository— URL string (the docs' Metadata table types this strictly asstring; no object form is documented)license— SPDX identifierkeywords— string array for discovery$schema— URL to the manifest JSON Schema (editor validation)defaultEnabled— boolean; whether the plugin is enabled on install (v2.1.154+)userConfig— object; per-key prompts shown to the user at enable time; values exposed as${user_config.<key>}substitutionschannels— array; message-injection channel bindingsdependencies— array of other plugins this one requires (supports semver constraints)
What ships with it
1 file 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.
- 8d ago First seen · 494 lines · 91 tokens per session scan A f737611d3f10
conventions-claude is a skill published in the GitHub repository xiaolai/nlpm (135 stars, last pushed yesterday), licensed ISC. It adds 91 tokens to every session and 6,780 once invoked, about $0.0005 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 2026-08-30.
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