| 1 | # HTML Report Format |
| 2 | |
| 3 | The architectural review is rendered as a single self-contained HTML file in the OS temp directory. Tailwind and Mermaid both come from CDNs. Mermaid handles graph-shaped diagrams reliably; hand-built divs and inline SVG handle the more editorial visuals (mass diagrams, cross-sections). Mix the two: don't lean on Mermaid for everything, it'll start to look generic. |
| 4 | |
| 5 | ## Scaffold |
| 6 | |
| 7 | ```html |
| 8 | <!doctype html> |
| 9 | <html lang="en |
| 10 | <head> |
| 11 | <meta charset=" |
| 12 | <title>Architecture review for {{repo name}}</title |
| 13 | <script src=" |
| 14 | <script type=" |
| 15 | import mermaid from " |
| 16 | mermaid.initialize({ |
| 17 | </script> |
| 18 | <style> |
| 19 | /* small custom layer for things Tailwind doesn't cover cleanly: |
| 20 | dashed seam lines, hand-drawn-feeling arrow heads, etc. */ |
| 21 | .seam { stroke-dasharray |
| 22 | .leak { stroke |
| 23 | .deep { background |
| 24 | </style> |
| 25 | </head> |
| 26 | <body class=" |
| 27 | <main class=" |
| 28 | <header>...</header |
| 29 | <section id=" |
| 30 | <section id=" |
| 31 | </main> |
| 32 | </body> |
| 33 | </html> |
| 34 | ``` |
| 35 | |
| 36 | ## Header |
| 37 | |
| 38 | Repo name, date, and a compact legend: solid box = module, dashed line = seam, red arrow = leakage, thick dark box = deep module. No introduction paragraph. Straight into the candidates. |
| 39 | |
| 40 | ## Candidate card |
| 41 | |
| 42 | The diagrams carry the weight. Prose is sparse, plain, and uses the glossary terms (from the `/codebase-design` skill) without ceremony. |
| 43 | |
| 44 | Each candidate is one `<article>`: |
| 45 | |
| 46 | - **Title**: short, names the deepening (e.g. "Collapse the Order intake pipeline"). |
| 47 | - **Badge row**: recommendation strength ( |
| 48 | - **Files**: monospaced list, |
| 49 | - **Before / After diagram**: the centrepiece. Two columns, side by side. See patterns below. |
| 50 | - **Problem**: one sentence. What hurts. |
| 51 | - **Solution**: one sentence. What changes. |
| 52 | - **Wins**: bullets, ≤6 words each. e.g. "Tests hit one interface", "Pricing logic stops leaking", "Delete 4 shallow wrappers". |
| 53 | - **ADR callout** (if applicable): one line in an amber-tinted box. |
| 54 | |
| 55 | No paragraphs of explanation. If the diagram needs a paragraph to be understood, redraw the diagram. |
| 56 | |
| 57 | ## Diagram patterns |
| 58 | |
| 59 | Pick the pattern that fits the candidate. Mix them. Don't make every diagram look the same. Variety is part of the point. |
| 60 | |
| 61 | ### Mermaid graph (the workhorse for dependencies / call flow) |
| 62 | |
| 63 | Use a Mermaid `flowchart` or `graph` when the point is "X calls Y calls Z, and look at the mess." Wrap it in a Tailwind-styled card so it doesn't feel parachuted in. Style with classDef to colour leakage edges red and the deep module dark. Sequence diagrams work well for "before: 6 round-trips; after: 1." |
| 64 | |
| 65 | ```html |
| 66 | <div class="rounded-lg border border-slate-200 bg-white p-4 |
| 67 | <pre class=" |
| 68 | flowchart LR |
| 69 | A[OrderHandler] --> B[OrderValidator] |
| 70 | B --> C[OrderRepo] |
| 71 | C -.leak.-> D[PricingClient] |
| 72 | classDef leak stroke:#dc2626,stroke-width:2px; |
| 73 | class C,D leak |
| 74 | </pre> |
| 75 | </div> |
| 76 | ``` |
| 77 | |
| 78 | ### Hand-built boxes-and-arrows (when Mermaid's layout fights you) |
| 79 | |
| 80 | Modules as `<div>`s with borders and labels. Arrows as inline SVG `<line>` or ` |
| 81 | |
| 82 | ### Cross-section (good for layered shallowness) |
| 83 | |
| 84 | Stack horizontal bands (`h-12 border-l-4`) to show layers a call passes through. Before: 6 thin layers each doing nothing. After: 1 thick band labelled with the consolidated responsibility. |
| 85 | |
| 86 | ### Mass diagram (good for "interface as wide as implementation") |
| 87 | |
| 88 | Two rectangles per module: one for interface surface area, one for implementation. Before: interface rectangle is nearly as tall as the implementation rectangle (shallow). After: interface rectangle is short, implementation rectangle is tall (deep). |
| 89 | |
| 90 | ### Call-graph collapse |
| 91 | |
| 92 | Before: a tree of function calls rendered as nested boxes. After: the same tree collapsed into one box, with the now-internal calls shown faded inside it. |
| 93 | |
| 94 | ## Style guidance |
| 95 | |
| 96 | - Lean editorial, not corporate-dashboard. Generous whitespace. Serif optional for headings (`font-serif` works well with stone/slate). |
| 97 | - Colour sparingly: one accent (emerald or indigo) plus red for leakage and amber for warnings. |
| 98 | - Keep diagrams ~320px tall so before/after sits comfortably side by side without scrolling. |
| 99 | - Use `text-xs uppercase tracking-wider` for module labels inside diagrams, so they read as schematic, not as UI. |
| 100 | - The only scripts are the Tailwind CDN and the Mermaid ESM import. The report is otherwise static: no app code, no interactivity beyond Mermaid's own rendering. |
| 101 | |
| 102 | ## Top recommendation section |
| 103 | |
| 104 | One larger card. Candidate name, one sentence on why, anchor link to its card. That's it. |
| 105 | |
| 106 | ## Tone |
| 107 | |
| 108 | Plain English, concise, but the architectural nouns and verbs come straight from the `/codebase-design` skill. Concision is not an excuse to drift. |
| 109 | |
| 110 | **Use exactly:** module, interface, implementation, depth, deep, shallow, seam, adapter, leverage, locality. |
| 111 | |
| 112 | **Never substitute:** component, service, unit (for module) · API, signature (for interface) · boundary (for seam) · layer, wrapper (for module, when you mean module). |
| 113 | |
| 114 | **Phrasings that fit the style:** |
| 115 | |
| 116 | - "Order intake module is shallow: interface nearly matches the implementation." |
| 117 | - "Pricing leaks across the seam." |
| 118 | - "Deepen: one interface, one place to test." |
| 119 | - "Two adapters justify the seam: HTTP in prod, in-memory in tests." |
| 120 | |
| 121 | **Wins bullets** name the gain in glossary terms: * |
| 122 | |
| 123 | No hedging, no throat-clearing, no "it's worth noting that…". If a sentence could be a bullet, make it a bullet. If a bullet could be cut, cut it. If a term isn't in the `/codebase-design` glossary, reach for one that is before inventing a new one. |