docs(agents): update AGENTS.md files with additional context

## Scoped AGENTS.md (MUST read when working in these directories)

| Directory | Purpose |

|-----------|---------|

| `src/tdoc_crawler/` | Import patterns, HTTP caching, anti-duplication |

| `src/tdoc_crawler/cli/` | CLI patterns |

| `packages/3gpp-ai/` | AI pipeline, embeddings, graph patterns |

| `packages/convert-lo/` | LibreOffice conversion |

| `tests/` | Testing patterns, fixtures, coverage |

List scoped AGENTS.md files with:

```shell

rg -l "" -g "*/**/AGENTS.md"

```

> **Agents:** When editing files in listed directories, load its AGENTS.md first. It contains directory-specific conventions that override this root file.

# CLI Submodule Guidelines

CLI-only code conventions, classification rules, and Typer/Rich patterns for the `tdoc_crawler` CLI.

## Design Principle

The `cli/` submodule contains **only CLI-related functionality**. The core `tdoc_crawler` package is a standalone library. Think of `cli/` as an optional extras package.

# Test Organization Guidelines

Test conventions, fixtures, mocking patterns, and coverage requirements for the 3GPP Crawler test suite.

## Quick Start

1. **General TDD patterns**: Use the `test-driven-development` skill for pytest, mocking, fixtures, and coverage