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 mxyhi/ok-skills --skill reverse-engineer-anythinggit clone --depth 1 https://github.com/mxyhi/ok-skillsWrote 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/mxyhi/ok-skills/reverse-engineer-anything)<a href="https://agentmods.dev/skills/mxyhi/ok-skills/reverse-engineer-anything"><img src="https://agentmods.dev/badge/skills/mxyhi/ok-skills/reverse-engineer-anything/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/mxyhi/ok-skills/reverse-engineer-anything"><img src="https://agentmods.dev/badge/skills/mxyhi/ok-skills/reverse-engineer-anything.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00063 | $0.02787 |
| Opus 5.5 | $0.00025 | $0.01115 |
| Sonnet 5.5 | $0.00013 | $0.00557 |
| Haiku 4.5 | $0.00006 | $0.00279 |
Grade A, and why
reverse-engineer-anything 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 3d 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
1 near-identical copy found in the catalogue:
- reverse-engineer-anything — 86% identical, 174 lines differ
How it starts
The opening of the file, as written. The whole thing — 220 lines — stays where its author put it; the contents beside it link to each section on GitHub.
REA
Use REA when a claim depends on a shipped binary or package, decompilation, passive application runtime evidence, or comparison with behavior not established by available source. For ordinary analysis of a complete source repository, use normal repository tools and do not run REA readiness or provider commands.
Connect only when needed
Installing this skill supplies instructions; it does not register the REA MCP server, install analysis engines, or add tools to an already-running agent.
If REA tools are available and their registration is not known to be stale, proceed directly to the target. Do not run diagnostics or setup before every investigation. Use the connected server's actual tool list and input schemas; a skill installed from repository main may describe capabilities absent from an older npm release. Keep complete inline Evidence when that server does not advertise retained references.
When tools are absent or registration is stale:
- Diagnose without changing files. For Codex, run
npx -y rea-agents@latest doctor --client codex --json. Substitute the current supported client:claude_code,claude_desktop,codex,cursor,gemini_cli,windsurf,devin,opencode,antigravity,copilot_cli,commandcode,vscode,grok_build,omp, orgrok_bot.grok_bothas no local file registration: doctor reports the Grok Bot chat step, and setup does not writemcp.json. If the client is unknown, usedoctor --jsonand inspect its registration results before choosing a setup scope. - Distinguish the reason. Missing, malformed, or stale registration needs a scoped configuration repair. An aligned registration with no tools in the active session needs a restart/reconnection; doctor cannot prove that the current agent has connected. A missing provider affects only tasks requiring that provider: static JavaScript inspection needs neither Hopper nor Ghidra, and Android inspection has separate bring-your-own JADX/Java prerequisites.
- For a configuration repair, prepare the read-only plan:
npx -y rea-agents@latest setup --client codex --dry-run --json. Use the current client's ID, show its exact proposed paths, backups, and changes, and obtain approval before setup writes configuration or installs Hopper. Setup normally installs the matching bundled skill too; include that replacement in the reviewed plan. After approval, apply the same scope withnpx -y rea-agents@latest setup --client codex --yes. Add--install-hopperonly if that separate installation was needed and explicitly approved. - Restart/reconnect the affected agent. Verify that REA tools actually appear in the session, then resume the original investigation. If they remain absent, inspect the client's MCP launch error rather than repeating setup.
What ships with it
6 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.
- 3d ago First seen · 220 lines · 63 tokens per session scan A 8d97f85a91e0
reverse-engineer-anything is a skill published in the GitHub repository mxyhi/ok-skills (503 stars, last pushed 4d ago), licensed Apache-2.0. It adds 63 tokens to every session and 2,787 once invoked, about $0.0003 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 2026-10-19.
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