Walkthrough

Explain a completed change with a few annotated visuals. Run this after final verification. A walkthrough explains proof; it does not replace proof. Reuse the final verified frames. Do not repeat the browser walk or send a message to a customer or anyone outside the team without explicit authorization.

Honor The Caller Contract

The caller decides whether the walkthrough is required. Follow the stricter repo rule when one exists.

The caller chooses scope and whether an artifact is required. Workflow, docs, and backend changes do not create a visual obligation on their own.

When the caller requires a walkthrough and it cannot be produced, block closeout with the exact missing tool, access, or artifact. Do not waive it silently.

When the caller requires a diff check and no relevant UI or rendered-output change exists, record:

Walkthrough: N/A — no UI or rendered-output change in this packet.

For a caller that requires a diff baseline, read baseline.md before the first mutation. It owns capture, comparison, and honest reconstruction.

Read The Minimum Evidence

Read only what explains the completed result:

• the latest request and acceptance criteria;
• the baseline, diff receipt, and final diff;
• final screenshots or rendered proof already captured;
• the final route, role, data fixture, viewport, theme, or source artifact.

Reuse valid final-state screenshots. Do not rerun an expensive flow only to capture the same state.

Show the inspected saved record, receipt, message, packet or final artifact, not just a control that promises it. Reuse the verifier's recorded artifact inspection when its source, identity, state and hash still match; open only missing or stale evidence. When a preview and a downloadable/readable artifact both exist, their material claims must agree. Report a contradiction as a failure without repeating an already-proved operation just for presentation.

Pick The Shortest Story

Use one to four frames. Each frame should explain one point:

1. where the user acts;
2. what changed or became possible;
3. what consequence appears;
4. what proves the result.

Prefer the shortest sequence a non-developer can understand in under one minute. Do not turn every field or test into a callout.

For QA, product-owner, or end-to-end walkthroughs, keep one subject, one user goal, one decision scope, and one time context across the whole sequence. If a frame changes any of them, label it as a separate example instead of implying causality. A screen captured after an action is not proof that the action caused that state unless the identity and time boundary match.

Capture The Real Artifact

For UI or rendered-output changes:

• capture the real final affected surface in its verified state;
• preserve the correct role, data, viewport, theme, and open or selected state;
• use the repo-required browser or capture tool;
• reuse existing final proof when it shows the required state.

For an explicit walkthrough of non-UI work, render the real final source, diff, report, document, CLI result, or provider read-back. Never invent a product screen to make backend or workflow work look visual.

Prefer light mode when both themes are equally truthful. Keep the verified theme when the change concerns dark mode or switching would misrepresent the result.

Save originals and annotated copies under a repo-approved ignored directory. Default to:

tmp/walkthrough/<slug>/

Use paired names:

01-<step>-original.png
01-<step>-annotated.png

Annotation

When annotation is required, read annotation.md. Retain the original and use the permitted deterministic annotation tool. This skill never authorizes changing product evidence.

Protect Sensitive Data

• Do not send credentials, tokens, private URLs, customer data, personal data, health data, or other repo-restricted content to an image tool.
• Use deterministic sanitized fixtures or crop and redact before annotation.
• Do not present a mockup, recreated HTML, or synthetic screen as completed product work.
• Do not claim the annotation itself proves runtime behavior.

Write Plain Technical Prose

Annotation labels, captions and the final handoff follow unslop. They also:

• Cover objective, owner, chosen fix, invariant, alternatives, blast radius, verification, and remaining risk when they apply.
• Never make the reader inspect the diff to understand why the result is correct and safe.

Final Handoff

In a project with plan pages, put the annotated images on the plan page, which is published with them, and keep the reply to the page link. Otherwise show every annotated image inline with an absolute local path. Give each image one short caption stating what to notice. Name the related test, browser, external, or source proof.

When a PR or tracker needs images, follow the owning repo's upload policy and replace local paths with hosted URLs there.

Close only when:

• the caller's applicability rule was classified correctly;
• the baseline and receipt exist when the caller uses a diff gate;
• the frames cover the user action and consequence;
• QA and product-owner flows keep one subject, goal, decision scope, and time context, or label each discontinuity as a separate example;
• the final frame shows the saved artifact itself, not only its navigation control;
• preview and final artifact claims agree, or the walkthrough reports their contradiction as a blocker;
• originals and annotated copies are saved;
• every annotation matches its original;
• annotated images appear on the plan page, or inline when the project has none;
• the owning proof is named.