Reference implementation for the Phoenix Architecture. Work in progress.
aicoding.leaflet.pub/
ai
coding
crazy
experiment: snake_case enforcement + stats path — 32%→100% (19/19)
Two prompt changes:
1. Enforce snake_case for column names and JSON keys (category_id not
categoryid, by_category not bycategory)
2. Stats endpoint at /todos/stats (natural REST sub-resource)
All 19 tests pass: categories CRUD, todos CRUD with FK validation,
LEFT JOIN with category_name, query filtering (completed, category_id),
stats with by_category aggregation, cascade delete protection.
Full pipeline: spec → canonical graph → IUs → working multi-resource
REST API with SQLite, foreign keys, JOINs, filtering, and validation.
+12
-4
+1
-1
examples/todo-app/spec/todos.md
+1
-1
examples/todo-app/spec/todos.md
···
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## Stats
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-
- GET /stats must return a JSON object with: total (total todo count), completed (completed count), incomplete (incomplete count), by_category (array of {category_name, count} ordered by count descending)
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+
- GET /todos/stats must return a JSON object with: total (total todo count), completed (completed count), incomplete (incomplete count), by_category (array of {category_name, count} ordered by count descending)
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## Error Handling
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+2
-2
experiments/eval-runner-arch.ts
+2
-2
experiments/eval-runner-arch.ts
···
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// ─── Stats ──────────────────────────────────────────────────────────────────
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await test('GET /stats returns counts', async () => {
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const res = await fetch(`${BASE}/stats`);
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+
const res = await fetch(`${BASE}/todos/stats`);
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if (res.status !== 200) return false;
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const body = await res.json() as Record<string, unknown>;
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return typeof body.total === 'number' && typeof body.completed === 'number' && typeof body.incomplete === 'number';
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});
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await test('GET /stats includes by_category', async () => {
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const res = await fetch(`${BASE}/stats`);
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const res = await fetch(`${BASE}/todos/stats`);
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if (res.status !== 200) return false;
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const body = await res.json() as Record<string, unknown>;
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const byCat = body.by_category as Array<Record<string, unknown>> | undefined;
+1
experiments/results-arch.tsv
+1
experiments/results-arch.tsv
···
6
6
2026-03-27T06:19:36.249Z 0.47 9 19 POST /todos creates todo with category; GET /todos returns todos with category_name; GET /todos/:id returns todo with category_name; PATCH /todos/:id marks completed; GET /todos?completed=1 filters completed; GET /todos?category_id=N filters by category; GET /stats returns counts; GET /stats includes by_category; DELETE /todos/:id returns 204; DELETE /categories/:id with todos returns 400
7
7
2026-03-27T06:23:08.133Z 0.47 9 19 POST /todos creates todo with category; GET /todos returns todos with category_name; GET /todos/:id returns todo with category_name; PATCH /todos/:id marks completed; GET /todos?completed=1 filters completed; GET /todos?category_id=N filters by category; GET /stats returns counts; GET /stats includes by_category; DELETE /todos/:id returns 204; DELETE /categories/:id with todos returns 400
8
8
2026-03-27T06:28:42.970Z 0.32 6 19 POST /todos creates todo with category; POST /todos creates todo without category; GET /todos returns todos with category_name; GET /todos/:id returns todo with category_name; GET /todos/999 returns 404; PATCH /todos/:id marks completed; GET /todos?completed=1 filters completed; GET /todos?completed=0 filters incomplete; GET /todos?category_id=N filters by category; GET /stats returns counts; GET /stats includes by_category; DELETE /todos/:id returns 204; DELETE /categories/:id with todos returns 400
9
+
2026-03-27T14:41:58.589Z 1.00 19 19 none
+8
-1
src/architectures/sqlite-web-api.ts
+8
-1
src/architectures/sqlite-web-api.ts
···
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### Data model
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- Use integer primary keys with AUTOINCREMENT.
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-
- Include a \`completed\` boolean column (as INTEGER 0/1) for task/todo resources when the spec mentions it.
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+
- ALWAYS use snake_case for column names: category_id, created_at, updated_at — NEVER categoryid or createdat.
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+
- ALWAYS use snake_case for JSON response keys: category_name, created_at — NEVER categoryname or createdat.
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- Include \`created_at TEXT NOT NULL DEFAULT (datetime('now'))\` for timestamps.
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+
- Foreign key columns must match the referenced table: \`category_id INTEGER REFERENCES categories(id)\`
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+
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+
### Stats / aggregate endpoints
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- If the spec describes a stats or aggregate endpoint, implement it as a route on the same router.
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- Use SQL aggregate functions (COUNT, SUM, AVG) with GROUP BY.
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- Return the JSON structure EXACTLY as the spec describes, using snake_case keys.
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`;
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const CODE_EXAMPLES = `