Every other catalogue counts. This one measures.
Skills, subagents, commands, hooks, Cursor rules and MCP servers for Claude Code, Cursor, Codex and Copilot. Each page says what the mod costs you in tokens on every session, what a security scan found and why, whether it is the original or one of the copies, and what changed since last week.
npx agentmods cost tells you what your current setup costs every session
They are all the same shape of thing: a file you drop in that changes how the agent behaves. Splitting them across nine sites is what everyone else does, and it is why nobody can tell you what your whole stack costs.
Loaded on demand. Two digits per session until invoked.
63,486Subagents with their own prompt. Injected whole.
65,264Slash commands, one file per job.
60,087Servers. The cost is their tool schemas, not the config.
20,950Cursor rules, loaded whole into a matching conversation.
54,973AGENTS.md, CLAUDE.md, copilot-instructions.
16,206Shell commands your agent runs. Read before installing.
4,931Configuration, so you can see what others turn on.
31,316Bundles of the above, shipped together.
The six mods whose repositories gained the most stars in the last seven days — movement, not accumulated fame.
K-Dense-AI/scientific-agent-skills
Skill Claude CodeCodex
Query and download public cancer imaging data from NCI Imaging Data Commons. Invoke for any question about IDC collections, cancer imaging datasets, DICOM data access, radiology (CT, MR, PET) or pathology AI training sets, metadata queries, visualization, or license checks — even when the user doesn't explicitly…
K-Dense-AI/scientific-agent-skills
Instructions file CodexOpenCode
AGENTS.md instructions for K-Dense-AI/scientific-agent-skills, covering repository guidance, what belongs here, layout, creating a skill and skill title.
Command Claude Code
You are orchestrating a two-agent job application workflow. The job posting is provided below as $ARGUMENTS (either a URL or pasted text).
Skill Claude CodeCodex
Finds new job postings matching your profile via installed portal-search CLIs (LinkedIn, local job boards, and any skills added with /add-portal). Deduplicates across runs. Triggers on: job scrape, find jobs, search jobs, new jobs, job search, scrape jobs, /scrape.
Agent Claude Code
Use this agent when the user needs to perform research tasks, gather information from external sources, or investigate topics that require web searches and synthesis of information.
Instructions file
Claude Code instructions for MadsLorentzen/ai-job-search, covering job application assistant for [yourname], role, candidate profile, identity and education.
Mods people are picking up this week, sorted by what they add to every session before you have asked anything. No other catalogue can offer this sort, because no other catalogue counts.
Command
Epic management commands.
Command Claude Code
A command for searching a personal medical-record data store by type, date, recency, or abnormal results. It reads an index and related JSON files, then presents the matching records and summary counts.
Command Claude Code
Perform a comprehensive code review using subagents for key areas.
anthropics/claude-agent-sdk-python
Command Claude Code
Based on the above changes, create a single git commit.
Command Claude Code
Review Github Pull Request.
Command Claude Code
Give context for creating handlers.
Every catalogue shows that a mod exists and how many stars sit behind it. None of them tells you what it costs, whether it is safe, whether it is the original, or whether it changed under you.
Per session and once invoked, counted locally with o200k_base and priced per model. A stack of six agents is twenty thousand tokens before you have typed anything.
Hidden Unicode, instruction-override phrasing, curl piped into a shell, recursive deletes, credential paths. A grade from A to F, and the exact line behind every finding.
Bodies are simhashed and clustered. The one with the most behind it is the original; the rest say how identical they are and point at it instead of competing with it.
Hashed on every crawl, with the history kept rather than the latest state alone. A supply-chain change to an agent config is a question of when, not whether.
Stars belong to the repository, not the mod: one repo with 170k stars and 139 skills would own the first three pages. Reputation enters through log10 and carries a quarter of the weight.
Every mod stays where its author put it and every page links to the source file. Bodies appear only under a permissive licence; no LICENSE means all rights reserved, and those pages say so.
What a mod is, what the numbers mean, and what this catalogue does and does not do.
Anything you add to a coding agent to change how it behaves: a skill, a subagent, a slash command, a hook, a Cursor rule, an instructions file, an MCP server, a plugin bundle. They are all the same shape of thing — a file you drop in that the agent then reads — so they belong in one catalogue rather than nine.
Because a mod is not free to have installed. An agent or a Cursor rule is injected into the context of every session whether or not you use it, and a stack of them can be twenty thousand tokens before you have asked anything. Every page here prints what the mod costs per session and what it costs once invoked, counted locally with the o200k_base tokenizer.
It is a static scan, not an audit, and the page says so. It looks for hidden Unicode, instruction-override phrasing, shell pipes into a downloaded script, recursive deletes, privilege escalation, credential paths and encoded payloads. Every finding is printed with the line that produced it, so you can judge whether it matters in context rather than trusting a letter.
Because most of them are. Bodies are simhashed and near-identical documents are clustered; the one with the most behind it is treated as the original and the rest point at it. A catalogue that lists nine copies of the same skill as nine results is making the search harder, not easier.
No. Every mod stays where its author put it, and every page links to the source file. Bodies are shown only where the repository carries a permissive licence; a repository with no LICENSE is all rights reserved, so those pages carry the metadata, the measurements and a link.
648,523 mods, measured four ways. Search by name, or sort a whole category by what it adds to your context.