Competition File Parser Chain
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 artif…
Install
$ agentstack add skill-zhaoxuya520-reverse-skill-competition-file-parser-chain ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-zhaoxuya520-reverse-skill-competition-file-parser-chain) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
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
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: zhaoxuya520
- Source: zhaoxuya520/reverse-skill
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.