api-contract-bundle

api-contract-bundle is a skill for Claude Code, Codex from liuxinye23/CyberStrikeAI. It costs 57 tokens per session (442 once invoked), scanned A, original, Apache-2.0.

A coordinator for reviewing whether an API’s documented contract matches its real behavior. An API is a program interface that lets software exchange requests and data; the bundle covers OpenAPI or Swagger documents, authentication, transport, secrets, and dependencies.

In plain words
What is it for?
Use it to compare endpoints and schemas with observed responses, review authentication declarations and token flows, check TLS assumptions, and find leaked keys or internal headers.
Why use it?
It helps distinguish documentation mistakes from runtime security problems and exposes gaps at trust boundaries.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Install

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.

agentmods
npx agentmods add skills/liuxinye23/cyberstrikeai/api-contract-bundle
Any agent
npx skills add liuxinye23/CyberStrikeAI --skill api-contract-bundle
Clone the repo
git clone --depth 1 https://github.com/liuxinye23/CyberStrikeAI

Made for: Claude Code, Codex.

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 api-contract-bundle

README.md
[![agentmods](https://agentmods.dev/badge/skills/liuxinye23/cyberstrikeai/api-contract-bundle.svg)](https://agentmods.dev/skills/liuxinye23/cyberstrikeai/api-contract-bundle)
Your own site
<a href="https://agentmods.dev/skills/liuxinye23/cyberstrikeai/api-contract-bundle"><img src="https://agentmods.dev/badge/skills/liuxinye23/cyberstrikeai/api-contract-bundle.svg" alt="Measured on agentmods" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 442 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00057 $0.00442
Opus 5 $0.00028 $0.00221
Sonnet 5 $0.00011 $0.00088
Haiku 4.5 $0.00006 $0.00044

Measured 5d ago against content hash 59b68958a0db, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

api-contract-bundle 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 5d 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.

skills/api-contract-bundle/SKILL.md · 67 lines

What it actually says

API Contract Bundle

Use this bundle when the request is fundamentally about API behavior, contract accuracy, or trust-boundary consistency.

Workflow

  1. Compare the declared contract with the observed runtime behavior.
  2. Pull in only the member skills required by the specific trust boundary in scope.
  3. Separate contract/documentation defects from exploitable runtime defects.

Load Order

  • Start with openapi-contract-review for endpoint, schema, and auth declaration drift.
  • Load token-lifecycle-review when the API relies on tokens or session-like refresh flows.
  • Load tls-configuration-review when transport assumptions or certificate posture matter.
  • Load dependency-risk-review when gateway, parser, or framework components may affect request handling.
  • Load secret-exposure-review when keys, internal headers, or backend config bleed into responses or docs.

Output

  • Contracted vs observed behavior
  • High-risk endpoints
  • Trust-boundary defects
  • Priority fixes
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. 5d ago First seen · 67 lines · 57 tokens per session scan A 59b68958a0db

Subscribe to this mod's changes

api-contract-bundle is a skill published in the GitHub repository liuxinye23/CyberStrikeAI (0 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 57 tokens to every session and 442 once invoked, about $0.0003 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 2026-08-31.

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