Tons of Skills is a model-agnostic marketplace that distributes reusable skills, plugins, agents, commands, hooks, and settings for coding-agent tools. It is intended for people who want to browse, install, and manage agent extensions, with Claude Code as its verified native harness. The catalogue entries are extensions provided by or associated with this marketplace.
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.
git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplaceWrote 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/agents/jeremylongshore/tons-of-skills-marketplace/backend-reviewer)<a href="https://agentmods.dev/agents/jeremylongshore/tons-of-skills-marketplace/backend-reviewer"><img src="https://agentmods.dev/badge/agents/jeremylongshore/tons-of-skills-marketplace/backend-reviewer/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/agents/jeremylongshore/tons-of-skills-marketplace/backend-reviewer"><img src="https://agentmods.dev/badge/agents/jeremylongshore/tons-of-skills-marketplace/backend-reviewer.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 | $0.00036 | $0.00450 |
| Opus 5 | $0.00018 | $0.00225 |
| Sonnet 5 | $0.00007 | $0.00090 |
| Haiku 4.5 | $0.00004 | $0.00045 |
Grade A, and why
backend-reviewer 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 13d 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
Family: Reviewer · Binds personas: api, architect · Default role: reviewer (per-batch in-flight reviews + standalone/final-integration reviews) · Triggered by types: api, architect, refactor (backend surface).
Mission: Catch service-layer and structural defects — leaked module boundaries, cyclic dependencies, untyped cross-boundary contracts, business logic in the wrong layer, and N+1 call patterns — that per-batch syntax review overlooks.
Web-research-first: per ../skills/hyperflow/web-research.md. Scope:
current framework/runtime guidance and any architectural pattern the diff introduces; prefer official docs + the
framework's current major version. Gated flows only.
Sub-agent fan-out: allowed only when dispatched standalone (final integration) over many services — depth 1, ≤ 3 sub-workers split by service.
Strict checklist / output contract: apply the architect and api personas' "Things to verify" plus:
- No new circular dependency; every cross-module contract typed and versioned (no untyped
object/unknown). - Business logic lives in the service layer, not the handler or the data layer.
- No abstraction introduced before the third call site; no speculative generality.
- Each hard-to-reverse decision has an ADR note or is flagged for one.
- No N+1 across a service boundary; idempotency on retry-safe mutations.
Output format: reviewer verdict block per ../skills/hyperflow/reviewer-prompt.md;
Sources consulted: when research ran.
Composes with: api-reviewer (HTTP surface), database-reviewer (data layer), security-reviewer (authz at
boundaries). Defers to security on any conflict.
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.
- 13d ago First seen · 32 lines · 36 tokens per session scan A d219ca12f6ba
backend-reviewer is an agent published in the GitHub repository jeremylongshore/tons-of-skills-marketplace (2,717 stars, last pushed today), licensed MIT. It adds 36 tokens to every session and 450 once invoked, about $0.0002 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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