Agent Skills
› zhaoxuya520/reverse-skill
› competition-file-parser-chain
competition-file-parser-chain
GitHubCTF沙箱内部下游技能，用于追踪文件从上传到解析、转换、反序列化的完整链路。需在沙箱协调器激活后使用，旨在定位关键边界和决定性后端效应。
Trigger Scenarios
用户询问文件上传或导入路径
需要追溯档案提取过程
分析预览或转换器行为
解释文件如何到达解析器或反序列化器
连接上传工件与最终后端影响
Install
npx skills add zhaoxuya520/reverse-skill --skill competition-file-parser-chain -g -y
SKILL.md
Frontmatter
{
"name": "competition-file-parser-chain",
"description": "Internal downstream skill for ctf-sandbox-orchestrator. CTF-sandbox workflow for file uploads, imports, previews, archive extraction, format conversion, parser invocation, and deserialization chains. Use when the user asks to inspect an upload or import path, trace archive extraction, preview or converter behavior, explain how a file reaches a parser or deserializer, or connect one uploaded artifact to the decisive backend effect. Use only after `$ctf-sandbox-orchestrator` has already established sandbox assumptions and routed here."
}
Competition File Parser Chain
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 following a file from ingress through every parser, extractor, converter, or deserializer boundary that matters.
Reply in Simplified Chinese unless the user explicitly requests English.
Quick Start
- Preserve the original upload and every derived artifact separately.
- Map the chain in order: ingress, temp storage, archive extraction, format conversion, parser call, deserialization, and final consumer.
- Record filenames, MIME guesses, extensions, temp paths, and parser choices before mutating anything.
- Separate client-visible validation from backend parser behavior.
- Reproduce the smallest file-processing chain that yields the decisive branch or artifact.
Workflow
1. Map File Ingress And Derivation
- Record request shape, multipart names, content type, filename, temp paths, upload staging, and storage keys.
- Note every derived artifact: extracted archive member, converted preview, generated thumbnail, temp document, or deserialized object.
- Keep original file and each derivative labeled separately.
2. Trace Parser And Conversion Boundaries
- Show which parser, converter, extractor, or deserializer runs at each step.
- Record parser-specific decisions driven by extension, MIME, magic bytes, schema, archive member names, or embedded metadata.
- Distinguish parsing success, preview success, conversion success, and business-logic acceptance.
3. Reduce To The Decisive File Chain
- Compress the result to the smallest sequence: upload -> derived artifact -> parser boundary -> resulting effect.
- State clearly whether the decisive weakness lives in archive handling, MIME inference, file conversion, path resolution, or deserialization.
- If the chain becomes mostly a generic async worker problem after enqueue, hand off to the tighter queue or worker skill.
Read This Reference
- Load
references/file-parser-chain.mdfor the ingress checklist, parser checklist, and evidence packaging.
What To Preserve
- Original uploads, derived files, temp paths, storage keys, parser names, and conversion steps
- The exact boundary where backend behavior diverges from user-visible validation
- One minimal replayable file-processing sequence that reaches the decisive effect
Version History
- 1bec1f2 Current 2026-07-05 18:44
