exponentially/helios

Helios is an Elixir framework designed for building CQRS and event-sourced applications. It provides core infrastructure including aggregate behaviors, a command processing pipeline, and pluggable event journal adapters for persistence. The system simplifies development through compile-time facade generation and includes comprehensive tooling for testing, static analysis, and code quality.

This entry marks the first public release (v0.1.0) of Helios, a framework for building Elixir CQRS applications. It introduces core capabilities including Aggregate Behavior, an Aggregate Server with supervision, and a distributed Registry using Swarm. A key feature is the compile-time generation of facade modules (e.g., \MyApp.Facade.User\) for aggregates, simplifying command routing. The release also establishes the necessary project infrastructure, including Travis CI integration, Apache 2.0 licensing, and comprehensive documentation with configuration guides for both in-memory and Eventstore-based event journals.

(repo-wide) · high confidence

Helios now provides a complete foundation for building event-sourced applications, including an Aggregate behavior with lifecycle management, a GenServer-based Aggregate Server that handles command execution, event replay, and snapshotting, and an in-memory Event Journal adapter for persisting events. The release also adds a Context struct for managing request state, a Pipeline system for processing commands through pluggable stages, and Facade modules that allow external code to dispatch commands to aggregates via generated proxy functions.

lib/helios · high confidence

Added integration test support for event journal and aggregates; Added test suite for aggregate server, routing, and pipeline execution; Updated Eventstore integration test configuration.

Helios has been updated to version 0.2.3, introducing several new dependencies including elixir\_uuid, libring, gen\_state\_machine, and poolboy, while upgrading the optional extreme adapter to version 0.13.3. The project now integrates dialyxir for static analysis, credo for code linting, and excoveralls for test coverage reporting. Additionally, the application now requires the :crypto application, and documentation has been reorganized to reflect the new module structure.

(dependencies) · high confidence

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

• CAI 58 → 56 (-1.7)
• Rubric changed (rubric-2026.08.17 → rubric-2026.09.15) — scores are not directly comparable.

• Code Health 97 → 98 (+1.1)
• Architecture 100 → 91 (-8.7)
• Maturity 49 → 45 (-3.5)
• Readiness 37 → 42 (+5.3)
• Security 100 → 79 (-21.3)
• Domain Modelling 100 → 100 (+0.0)
• Event Sourcing 100 → 100 (+0.0)

• Coverage not included — suite not readable by the collector
• Dependency hygiene not measured — no supported dependency manifest was read
• Duplicated block (12–15 lines × 2) (lib/helios/registry/tracker.ex)
• Duplicated block (21 lines × 2) (lib/helios/event_journal/adapters/memory.ex)
• Duplicated block (6 lines × 2) (lib/helios/router/aggregate.ex)
• Duplicated block (6 lines × 2) (lib/helios/router/aggregate.ex)
• Duplicated block (9 lines × 3) (lib/helios/event_journal/adapters/memory.ex)
• No exposed public API
• Test reliability not included
• The README is an installation/configuration guide with only a single example application reference; it does not describe the overall CQRS/aggregate structure or how Helios fits into a segregated app. (README.md)
• TooManyMethods: Tracker (lib/helios/registry/tracker.ex)
• single-maintainer — knowledge-concentration (bus factor) risk

• Duplicated block (12–19 lines × 2) (lib/helios/registry/tracker.ex)
• Duplicated block (36 lines × 2) (lib/helios/event_journal/adapters/memory.ex)
• Duplicated block (5 lines × 2) (lib/helios/event_journal/adapters/memory.ex)
• Duplicated block (8 lines × 4) (lib/helios/event_journal/adapters/memory.ex)
• FileTooLong: registry/tracker.ex (lib/helios/registry/tracker.ex)
• High CVE: [GHSA redacted] (mix.lock)
• Members sharing a duplicated core (4 members, 50+ identical tokens) (lib/helios/event_journal/adapters/memory.ex)
• Most significant orphaned file (lib/helios/registry/tracker.ex)
• No SBOM
• No artifact signing
• No build provenance
• No dependency advisory monitoring
• Outdated: elixir_uuid
• Outdated: ex_doc
• Outdated: excoveralls
• Outdated: libring
• Outdated: poolboy
• TodoComment (lib/helios/aggregate/server.ex)
• TodoComment (lib/helios/context.ex)
• TodoComment (lib/helios/event_journal/adapters/eventstore.ex)
• …and 3 more

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

exponentially/helios was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point a surveyor at a repository you know and see whether you agree with it.