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 xAmirHamza77/ReverseOps-Skill --skill protocol-reversegit clone --depth 1 https://github.com/xAmirHamza77/ReverseOps-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/xamirhamza77/reverseops-skill/protocol-reverse)<a href="https://agentmods.dev/skills/xamirhamza77/reverseops-skill/protocol-reverse"><img src="https://agentmods.dev/badge/skills/xamirhamza77/reverseops-skill/protocol-reverse/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/xamirhamza77/reverseops-skill/protocol-reverse"><img src="https://agentmods.dev/badge/skills/xamirhamza77/reverseops-skill/protocol-reverse.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 | $0.00030 | $0.01021 |
| Opus 5 | $0.00015 | $0.00511 |
| Sonnet 5 | $0.00006 | $0.00204 |
| Haiku 4.5 | $0.00003 | $0.00102 |
Grade A, and why
protocol-reverse 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Protocol Reverse Engineering
ACTION REQUIRED (execute immediately after reading)
NOW: Read../field-journal/precedent-reverse.md— confirm authorization and routine-operation boundariesNOW: Confirm whether the task is protocol/traffic/serialization format reversing (pure Web parameter signing → go tojs-reverse/)NOW: If target network interaction is involved → run../scripts/case-init.ps1to complete the scope; ACT against the target is forbidden unlessauthis grantedNEXT: Read../tool-index.md; bootstrap missing tools (tshark/wireshark etc. may require manual installation)ACT: Enter workflow Phase 1 and produce a frame layout or message dictionary draft
Applicable scenarios
- Custom TCP/UDP binary protocols
- Protobuf / gRPC / FlatBuffers / MessagePack
- WebSocket / MQTT / private RPC
- Recovering fields and state machines from PCAP / PCAPNG
- Client-server checksums, sequence numbers, encrypted frame headers
When not to use this skill
| Situation | Where to go |
|---|---|
| Only HTTP parameter signing / JS encryption | js-reverse/ |
| Only TLS certificate issues | pentest-tools/ or browser proxy |
| Deep dive into an in-firmware protocol stack + emulation | firmware-pentest/ first, then return to this skill |
Workflow
Phase 1 — Collection and triage
□ Obtain samples: PCAP / proxy export / client logs / binaries
□ Mark direction: C→S / S→C; whether there is handshake, heartbeat, reconnect
□ Fixed header? Magic number? Length field? TLV? Fixed size?
□ Compression (zlib/gzip/lz4) or encryption (AES/ChaCha within the frame)?
□ tshark -r cap.pcap -T fields -e frame.number -e ip.src -e tcp.payload
Phase 2 — Frame layout recovery
□ Align multiple messages of the same type; find invariant bytes / auto-incrementing sequence numbers
□ Length field: big-endian/little-endian, including header/not including header
□ Checksums: position of CRC16/32, checksum, HMAC
□ Draw the state machine: Connect → Auth → Ready → Request/Response → Close
□ Tools: Wireshark custom dissector draft / ImHex / 010 Editor template / Kaitai Struct
What ships with it
1 file 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.
- 5d ago First seen · 99 lines · 30 tokens per session scan A de8e15e2c6cc
protocol-reverse is a skill published in the GitHub repository xAmirHamza77/ReverseOps-Skill (4 stars, last pushed 1mo ago), licensed MIT. It adds 30 tokens to every session and 1,021 once invoked, about $0.0002 per session on Opus 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 2026-09-03.
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