Reverse Skill is a routing package for AI coding agents that selects appropriate reverse-engineering, penetration-testing, and security-research methods and tools for a given target. It is used for tasks involving APKs, binaries, frontend JavaScript, packet captures, CTF challenges, and authorized penetration testing. Its catalogue add-ons provide the skills and instructions that guide these workflows.
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 skills add zhaoxuya520/reverse-skill --skill competition-graphql-rpc-driftgit clone --depth 1 https://github.com/zhaoxuya520/reverse-skillWrote 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/zhaoxuya520/reverse-skill/competition-graphql-rpc-drift)<a href="https://agentmods.dev/skills/zhaoxuya520/reverse-skill/competition-graphql-rpc-drift"><img src="https://agentmods.dev/badge/skills/zhaoxuya520/reverse-skill/competition-graphql-rpc-drift/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/skills/zhaoxuya520/reverse-skill/competition-graphql-rpc-drift"><img src="https://agentmods.dev/badge/skills/zhaoxuya520/reverse-skill/competition-graphql-rpc-drift.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00114 | $0.00639 |
| Opus 5.5 | $0.00046 | $0.00256 |
| Sonnet 5.5 | $0.00023 | $0.00128 |
| Haiku 4.5 | $0.00011 | $0.00064 |
Grade A, and why
competition-graphql-rpc-drift 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 1mo 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.
Copies of this mod
4 near-identical copies found in the catalogue:
- competition-graphql-rpc-drift — 100% identical, 0 lines differ
- competition-graphql-rpc-drift — 100% identical, 0 lines differ
- competition-graphql-rpc-drift — 100% identical, 0 lines differ
- competition-graphql-rpc-drift — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Competition Graphql Rpc Drift
Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.
Use this skill when the hard part is matching declared contracts with live handlers to find hidden, stale, or privileged operations.
Reply in Simplified Chinese unless the user explicitly requests English.
Quick Start
- Collect the declared contract surface first: schema, manifest, generated client, persisted query map, or OpenAPI spec.
- Record actual request shapes, operation names, variables, method, path, and auth context before mutating anything.
- Compare declared contract, generated client behavior, and live handler behavior side by side.
- Preserve one accepted operation and one drifted or hidden operation with the smallest delta.
- Reproduce the smallest contract-to-handler mismatch that proves the decisive branch.
Workflow
1. Map The Declared Contract Surface
- Record GraphQL schema, introspection output, persisted query ids, RPC manifests, generated clients, or OpenAPI documents that define the intended surface.
- Note versioned endpoints, client-only guards, hidden enums, optional fields, and operation naming conventions.
- Keep document source and generation path tied to the observed requests.
2. Prove Live Handler Behavior
- Capture the real request and response pairs, including operation name, variables, headers, cookies, and status.
- Compare client-side validation, schema expectations, and live handler normalization or fallback behavior.
- Record hidden operations, stale fields, undocumented methods, or handler-only branches that still execute.
3. Reduce To The Decisive Drift Path
- Compress the result to the smallest sequence: declared contract -> actual request -> handler branch -> resulting capability.
- State clearly whether the decisive drift lives in generated client assumptions, persisted query mapping, schema version skew, RPC manifest mismatch, or handler-side hidden logic.
- If the task shifts into generic JWT, OAuth, or queue behavior after acceptance, hand off to the tighter specialized skill.
What ships with it
2 files 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.
- 1mo ago First seen · 51 lines · 114 tokens per session scan A a6e8e2d54d79
competition-graphql-rpc-drift is a skill published in the GitHub repository zhaoxuya520/reverse-skill (43,575 stars, last pushed 1mo ago), licensed MIT. It adds 114 tokens to every session and 639 once invoked, about $0.0005 per session on Opus 5.5. 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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