Agent skill

Dexfixer Reconstruction

by manyuegong33 in manyuegong33/r0crawl_skills

Beginner-friendly workflow for DEX extraction and repair: header, checksum, map list, multi-dex, oat, odex, vdex, and decompiler validation.

No licenceAuto-check passedSecurity

Install Dexfixer Reconstruction

skills CLI
$ npx skills add manyuegong33/r0crawl_skills --skill dexfixer-reconstruction -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install manyuegong33/r0crawl_skills dexfixer-reconstruction --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/manyuegong33/r0crawl_skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/dexfixer-reconstruction .claude/skills/dexfixer-reconstruction && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
dexfixer-reconstruction
GitHub stars
312
Token cost
~504 tokens
SKILL.md length
202 words
Files
2
Skills in repo
9
Repo updated
First seen
Licence
None found

At a glance

Beginner-friendly workflow for DEX extraction and repair: header, checksum, map list, multi-dex, oat, odex, vdex, and decompiler validation.

  • Works in 6 steps: Record sample hash, version,… → Preserve raw artifacts before modifying,… → Perform the smallest observation that… → …
  • A reverse-engineering task needs reliable observation
  • SKILL.md covers Beginner mode, Workflow, Quality gates and Deliverables
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Dexfixer Reconstruction is an agent skill from manyuegong33/r0crawl_skills. Beginner-friendly workflow for DEX extraction and repair: header, checksum, map list, multi-dex, oat, odex, vdex, and decompiler validation. Extracts general methods and evidence practices without depending on any author, private repository, personal path, secret, or branded prompt. Use when a reverse-engineering task needs reliable observation, loader analysis, runtime evidence, dump validation, crash attribution, tool setup, or reproducible reporting.

Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Security, covering Reverse engineering and malware. The repository describes itself as: r0crawlskills is a massive reverse-engineering skill arsenal for web, Android, iOS, Frida, native binaries, protocols, malware, firmware, and anti-analysis—built for beginners…

When your agent uses it

  • A reverse-engineering task needs reliable observation
  • Loader analysis
  • Runtime evidence
  • Dump validation

Example prompts

  • “/dexfixer-reconstruction”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

  1. Record sample hash, version, architecture, environment, entry action, and objective.
  2. Preserve raw artifacts before modifying, decoding, dumping, or patching anything.
  3. Perform the smallest observation that can distinguish competing hypotheses.
  4. Correlate static references with runtime stacks, registers, mappings, files, traffic, and outputs.
  5. Record commands, tool versions, paths, offsets, timestamps, and first-difference locations.
  6. Validate the result with a clean baseline, repeat run, edge case, and consumer tool or independent observation.

What it can do on your machine

Read from SKILL.md and the folder at commit b9eb545. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Dexfixer Reconstruction loads about 504 tokens when it runs. Until then it costs about 120 tokens; SKILL.md has 202 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~120
When it runs · the whole SKILL.md, loaded when a task matches
~504

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 202 words (~504 tokens).

“Explain the object, the observation question, the required evidence, the first tool, and the success criterion before using advanced terminology.”

— opening of SKILL.md by manyuegong33
name
dexfixer-reconstruction

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file in skills/dexfixer-reconstruction of manyuegong33/r0crawl_skills.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit b9eb545

Compare with similar skills

Dexfixer Reconstruction next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Dexfixer Reconstruction compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Dexfixer Reconstruction this skillmanyuegong33/r0crawl_skills312—~504Automated safety check: PassNone
vphone600 Kernel Symbol AnalysisLakr233/vphone-cli15k—~530Automated safety check: PassMIT
Webhome Extension Builderwebhtv/webhtv1.7k—~2.8kAutomated safety check: PassGPL-3.0
Create Sigma RuleTracecatHQ/tracecat3.8k—~16kAutomated safety check: PassMIT
Website Rebuildboyang-hu/website-rebuild-skill1.4k—~6.1kAutomated safety check: PassMIT
Client Request Signature Reversalawarexone/Agentic-Bug-Hunter5.3k—~4.7kAutomated safety check: PassMIT

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Categories

Questions about Dexfixer Reconstruction

What does Dexfixer Reconstruction do?

Beginner-friendly workflow for DEX extraction and repair: header, checksum, map list, multi-dex, oat, odex, vdex, and decompiler validation. Dexfixer Reconstruction is an agent skill from manyuegong33/r0crawl_skills. Beginner-friendly workflow for DEX extraction and repair: header, checksum, map list, multi-dex, oat, odex, vdex, and decompiler validation.

When should I use Dexfixer Reconstruction?

Dexfixer Reconstruction fits situations like: A reverse-engineering task needs reliable observation; loader analysis; runtime evidence; dump validation.

How do I install Dexfixer Reconstruction in Claude Code?

Run `npx skills add manyuegong33/r0crawl_skills --skill dexfixer-reconstruction -a claude-code`. Or copy the skill folder (skills/dexfixer-reconstruction in manyuegong33/r0crawl_skills) into .claude/skills/dexfixer-reconstruction in your project. Claude Code loads it when a task matches its description.

How do I install Dexfixer Reconstruction in Codex?

Run `npx skills add manyuegong33/r0crawl_skills --skill dexfixer-reconstruction -a codex`. Or copy the skill folder (skills/dexfixer-reconstruction in manyuegong33/r0crawl_skills) into .agents/skills/dexfixer-reconstruction in your project. Codex loads it when a task matches its description.

Can I use Dexfixer Reconstruction in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add manyuegong33/r0crawl_skills --skill dexfixer-reconstruction -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dexfixer-reconstruction, .gemini/skills/dexfixer-reconstruction, .github/skills/dexfixer-reconstruction and .opencode/skills/dexfixer-reconstruction in your project.

What does Dexfixer Reconstruction need to run?

SKILL.md names no scripts, command-line tools or credentials: Dexfixer Reconstruction is instructions for the agent only.

Does Dexfixer Reconstruction access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Dexfixer Reconstruction safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Dexfixer Reconstruction use?

No licence was found for Dexfixer Reconstruction or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Dexfixer Reconstruction use?

About 504 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Dexfixer Reconstruction?

Skills that share tags, products or a category with Dexfixer Reconstruction: vphone600 Kernel Symbol Analysis (Lakr233/vphone-cli, 15k stars), Webhome Extension Builder (webhtv/webhtv, 1.7k stars), Create Sigma Rule (TracecatHQ/tracecat, 3.8k stars) and Website Rebuild (boyang-hu/website-rebuild-skill, 1.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Dexfixer Reconstruction?

manyuegong33 (a GitHub user) maintains it in manyuegong33/r0crawl_skills, which has 312 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on September 20, 2026.

Source: manyuegong33/r0crawl_skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.