description: FreshRSS introduction and conventions for AI agents and human contributors

FreshRSS introduction and conventions

FreshRSS is an open-source news aggregator supporting RSS/ATOM/WebSub and also Web scraping.

The market segment is mostly self-hosting, although multiple user accounts are supported. It is supposed to be installed on a modest server (mostly, but not limited to, Linux) and can be accessed through a Web UI and an API.

It is written in PHP to make it easy to deploy and easy to contribute to.

More information can be found in README and in the documentation published at https://freshrss.github.io/FreshRSS/en/

Instruction structure for AI agents and humans

.github/instructions/ contain the instructions that primarily match filename patterns.
.github/skills/ contain the skills to achieve higher-level goals, potentially combining multiple instructions.
AGENTS.md is the entry point description for AI coding agents and contributors, referencing other documents such as instructions and skills.
Favour standard conventions over vendor-specific ones.
To reduce duplication, refer to enforceable configuration files instead of excessive free-text repetitions.

Code structure

app/Controllers/ – Controllers extend FreshRSS_ActionController, named as {name}Controller.php with class FreshRSS_{name}_Controller
app/Models/ – Domain models extend Minz_Model.
- DAOs may have some database-specific inheritance, e.g.: *DAO.php (base or MySQL), *DAOSQLite.php (SQLite), *DAOPGSQL.php (PostgreSQL)
app/views/{controller}/ – View templates are .phtml files mixing PHP and HTML
app/views/helpers/ – Reusable view elements with $this->partial('name')
lib/core-extensions/ or extensions/ – FreshRSS extensions
lib/Minz/ – Core framework: routing, sessions, translations, extensions, PDO abstraction
lib/lib_rss.php – Contain spl_autoload_register and other global functions
p/ – Public Web root. Only the content of this folder should be exposed if possible (p/ should not be visible in the public URL)
- Only the p/i/ path should be access controlled. The main entry point is p/i/index.php
- p/api/greader.php – Primary API for mobile clients
- p/api/pshb.php – Receive realtime pushes via WebSub
- p/themes/ – UI themes

Configuration data

Constants: constants.php overridden in constants.local.php
System config: config.default.php overridden in data/config.php
User config: config-user.default.php overridden in data/users/{username}/config.php

ℹ Access via FreshRSS_Context::systemConf() and FreshRSS_Context::userConf()

Database patterns

Three database backends supported: SQLite, PostgreSQL, MySQL/MariaDB. The SQL differences are implemented through inheritance:

// Base DAO with common queries
class FreshRSS_EntryDAO extends Minz_ModelPdo { }
// Database-specific overrides
class FreshRSS_EntryDAOSQLite extends FreshRSS_EntryDAO { }
class FreshRSS_EntryDAOPGSQL extends FreshRSS_EntryDAO { }

A factory pattern selects the correct DAO, e.g.:

FreshRSS_Factory::createEntryDao();

Important: in database, VARCHAR/TEXT fields are HTML-encoded, except attributes fields, which contain JSON, and which sub-strings are not HTML-encoded.

Main development commands

ℹ Recommended before committing

# Runs all tests: PHPUnit, PHPCS, PHPStan, typos
make test-all

# Auto-fix all trivial issues: whitespace, RTL CSS, translations
make fix-all

# See a list of commands:
make help

CI/CD is defined in .github/workflows/tests.yml

A Dev Container is available under .devcontainer/.

Docker

ℹ Check Docker documentation.

CLI Tools

There are scripts in cli/ for admin tasks, such as:

./cli/list-users.php

ℹ Check CLI documentation.

When possible, it is best to run as Web server user:

sudo -u www-data cli/actualize-user.php --user alice

or at least re-apply the file permissions after CLI operations:

cli/access-permissions.sh

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