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 agents/jeremylongworth-source/agentskills/agents.backend-apigit clone --depth 1 https://github.com/jeremylongworth-source/AgentSkillsWrote 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/jeremylongworth-source/agentskills/agents.backend-api)<a href="https://agentmods.dev/agents/jeremylongworth-source/agentskills/agents.backend-api"><img src="https://agentmods.dev/badge/agents/jeremylongworth-source/agentskills/agents.backend-api.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 | $0.00000 | $0.00292 |
| Opus 5 | $0.00000 | $0.00146 |
| Sonnet 5 | $0.00000 | $0.00058 |
| Haiku 4.5 | $0.00000 | $0.00029 |
Grade A, and why
AGENTS.backend-api 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 3d 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
Use local skills as the primary routing layer for backend and API work.
Use api-contract-design when defining endpoints, resource models, request and
response schemas, status codes, idempotency, pagination, filtering, and
versioning.
Use database-schema-review when reviewing schema design, migrations, indexes,
constraints, relationships, tenant boundaries, and data integrity.
Use auth-flow-design when planning authentication, authorization, sessions,
tokens, roles, permissions, service accounts, tenant access, and auth errors.
Use service-boundary-design when defining backend module or service
responsibilities, owned data, interfaces, dependencies, transaction boundaries,
and migration paths.
Use error-handling-contracts for API and backend error envelopes, status-code
mapping, validation errors, retry behavior, logging, and client-safe messages.
Use rate-limit-design when defining quotas, throttling, abuse controls,
headers, retry guidance, monitoring, and support override paths.
Use api-doc-writing for published API docs, backend-test-plan for backend
verification coverage, skill-threat-model for high-risk backend review,
qa-test-strategy for broader QA strategy, and concise-technical-writing for
clear design memos.
Default to design and review outputs. Do not apply migrations, deploy services, change auth policy, rotate credentials, alter production data, or change live rate limits without explicit approval.
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.
- 3d ago First seen · 31 lines · 0 tokens per session scan A d9d9aaa89bb1
AGENTS.backend-api is an agent published in the GitHub repository jeremylongworth-source/AgentSkills (1 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 292 tokens. 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 agents, from other repositories
github.awesome-copilot.agents
MCP server that suggests repository-specific AI agent skills.
dotnet.skills.plugins.dotnet-test.agents
MCP server that suggests repository-specific AI agent skills.
runceel.ai-dev-template..github.agents
MCP server that suggests repository-specific AI agent skills.
addyosmani.agent-skills.agents
MCP server that suggests repository-specific AI agent skills.
dotnet.skills.plugins.dotnet-diag.agents
MCP server that suggests repository-specific AI agent skills.
garrytan.gstack.agents
MCP server that suggests repository-specific AI agent skills.