What problem does it solve? CTF challenges involving unknown binary or text protocols require more than naming the protocol: you must recover framing, checksums, sequence state, and reproduce the exact message order that the server accepts, which is error-prone without a structured method. ## Core Features & Use Cases - Session State Machine Mapping: Identify handshake, authentication, keepalive, command, and teardown phases, tracking which fields are static, derived, or dependent on prior messages. - Framing and Integrity Recovery: Reconstruct lengths, delimiters, type bytes, checksums, MACs, counters, and compression or encryption boundaries while separating transport framing from application framing. - Minimal Replay Harness: Reduce a captured session to the smallest transcript that reaches the accepted state, preserving both the original capture and the mutation that flips rejection to acceptance. - Use Case: During a CTF, you capture a custom TCP service exchange. Use this Skill to decode the framing, recover the checksum rule, and build a replay script that reproduces the accepted session and triggers the flag branch. ## Quick Start Ask the agent to decode the captured custom protocol session and build the smallest replay that reaches the accepted server state.
