What problem does it solve? Reviewers facing a PR that introduces an unfamiliar subsystem, protocol, or vocabulary of types have no route into the code; the diff shows what changed but not how to understand it. This Skill writes a reading guide into the PR description so reviewers know where to start and in what order to read. ## Core Features & Use Cases - Mental-Model Diagram: Generates a mermaid flowchart where every node label carries its job or invariant, capped at seven nodes, with dotted edges showing round-trips or idempotency. - Ordered Reading Table: Builds a four-to-seven-row table linking exact symbols to the pinned commit SHA, ordered by what must be understood first and ending on the proving test. - Safe Description Splicing: Wraps the guide in HTML comment markers and uses gh pr edit --body-file so re-runs replace the block instead of duplicating it. - Use Case: A PR introduces a new binary encoder; the Skill adds a diagram of the encode/decode round-trip plus a table routing the reviewer from the type definitions through the encoder to the byte-for-byte round-trip test. ## Quick Start Ask the AI to add a reading guide with a mental-model diagram and reading-order table to the current GitHub PR description.
