Maintainer Guide

This page summarizes how the API, CLI, and documentation site are wired together.

Public API boundary

The stable Python API is exported from:

co_op_translator.api

The public API is organized into content translation helpers, path rewriting helpers, project orchestration, and review:

from co_op_translator.api import (
    ImageTranslationOptions,
    MarkdownTranslationOptions,
    NotebookTranslationOptions,
    run_review,
    run_translation,
    rewrite_markdown_paths,
    rewrite_notebook_paths,
    translate_image_content,
    translate_markdown_content,
    translate_notebook_content,
    translate_project,
)

When adding new public APIs, update:

• src/co_op_translator/api/__init__.py
• docs/api.md
• relevant API tests under tests/co_op_translator/, such as test_api.py or test_review_api.py

Avoid documenting lower-level core modules as stable API unless the project intends to support them directly.

CLI entry points

The package defines these Poetry scripts:

[tool.poetry.scripts]
translate = "co_op_translator.__main__:main"
evaluate = "co_op_translator.__main__:main"
migrate-links = "co_op_translator.__main__:main"
co-op-review = "co_op_translator.__main__:main"
co-op-translator-mcp = "co_op_translator.mcp.server:main"

src/co_op_translator/__main__.py dispatches by script name:

• translate calls co_op_translator.cli.translate.translate_command
• evaluate calls co_op_translator.cli.evaluate.evaluate_command
• migrate-links calls co_op_translator.cli.migrate_links.migrate_links_command
• co-op-review calls co_op_translator.cli.review.review_command

co-op-translator-mcp bypasses __main__.py and calls co_op_translator.mcp.server:main directly.

When adding or changing CLI options, update:

• the relevant src/co_op_translator/cli/*.py command
• docs/cli.md
• CLI-related tests, if behavior changes

MCP server

The MCP server is implemented in:

co_op_translator.mcp.server

The server intentionally wraps the public Python API rather than calling lower-level core modules. Keep this boundary intact so MCP clients, Python callers, and the CLI share the same behavior.

When adding or changing MCP tools, update:

• src/co_op_translator/mcp/server.py
• tests/co_op_translator/test_mcp_server.py
• docs/mcp.md
• docs/api.md if the public API surface changes

Repository translation tools are model-callable through MCP and can write many files. Keep dry_run=True as the default and require confirm_write=True before non-dry-run project translation.

Translation flow

The high-level project translation flow is:

1. Parse CLI arguments or API parameters.
2. Validate LLM configuration with LLMConfig.
3. Validate Azure AI Vision when image translation is selected.
4. Normalize language codes.
5. Detect legacy language folder aliases.
6. Estimate translation volume.
7. Update README language/course sections when applicable.
8. Delegate project translation to ProjectTranslator.
9. ProjectTranslator delegates file processing to TranslationManager.

TranslationManager is composed from focused file-type mixins:

• ProjectMarkdownTranslationMixin handles Markdown file reads, content translation, path rewriting, metadata, disclaimers, and writes.
• ProjectNotebookTranslationMixin handles notebook file reads, Markdown-cell translation, path rewriting, metadata, disclaimers, and writes.
• ProjectImageTranslationMixin handles image discovery, text extraction/translation, rendered image writes, and metadata.

The lower-level content APIs skip the project workflow:

1. translate_markdown_content and translate_notebook_content translate in-memory content only.
2. translate_image_content translates text in a single image and returns a rendered image object.
3. rewrite_markdown_paths and rewrite_notebook_paths are explicit post-processing helpers. They perform no translation and no project writes.

Review flow

The deterministic review flow is:

1. Parse CLI arguments or API parameters.
2. Normalize requested language codes.
3. Build one or more review targets from root_dir, root_dirs, or groups.
4. Optionally limit source files with --changed-from.
5. Run deterministic checks for structure, translation freshness, Markdown integrity, and local link/image paths.
6. Print either text output or GitHub-flavored Markdown.
7. Exit with a failure when review errors are found.

The review flow does not require API keys and should remain suitable for pull request CI. The pull request workflow writes a check summary on every run and only posts a PR comment when co-op-review fails.

Documentation site

The docs site is configured by:

mkdocs.yml
requirements-docs.txt
docs/

The docs/ directory is the canonical documentation source. Do not add new end-user guides outside this directory unless the project intentionally introduces another published documentation surface.

Build locally:

python -m pip install -r requirements-docs.txt
python -m mkdocs build --strict

Preview locally:

python -m mkdocs serve

The generated site is written to site/, which is ignored by git.

GitHub Pages workflow

.github/workflows/docs.yml builds the site on pull requests and deploys it on pushes to main.

The workflow installs:

pip install -r requirements.txt
pip install -r requirements-docs.txt

Installing runtime dependencies before docs dependencies lets mkdocstrings import the package and render the public Python API reference.

Docs quality bar

Before merging documentation changes, run:

python -m mkdocs build --strict
git diff --check

Use strict builds so broken links, invalid navigation entries, and API rendering issues fail early.