quantum-elixir/quantum-core

This system is a distributed cron-scheduler library for Elixir that manages the lifecycle of scheduled jobs across cluster nodes. It utilizes a GenStage-based architecture to broadcast time-based events and execute jobs according to configurable strategies like All, Local, or Random. The library provides observability through telemetry events for job operations and ensures reliability by persisting job state and validating configurations at startup.

The Quantum scheduler now exposes telemetry events for job operations, including add, update, delete, start, stop, and exception. This allows users to monitor job execution metrics and track job state changes through the TelemetryRegistry integration.

lib · high confidence

The application now includes a base configuration file that enables comprehensive console logging metadata (including crash reasons) and configures the Elixir time zone database to use Tzdata. Additionally, a Credo configuration file is introduced to enforce code style rules, such as a maximum line length of 120 characters, while explicitly disabling the check for missed logger metadata keys.

config · high confidence

This release establishes the foundational structure for the Quantum cron-scheduler library. It introduces standard Elixir development tooling, including a \.formatter.exs\ for code formatting and a \.tool-versions\ file pinning Erlang 29.1.1 and Elixir 1.20.4. The project also adds a comprehensive \.gitignore\ to exclude build artifacts, documentation, and lock files, alongside a \dialyzer.ignore-warnings\ file to handle static analysis noise. Documentation is standardized with a new \README.md\ and a detailed \CHANGELOG.md\ tracking history from v1.0.0 through v3.4.0.

(repo-wide) · high confidence

A new .gitkeep file has been added to the priv/plts directory. This ensures the directory is tracked by version control, likely in preparation for storing Precompiled Lookup Tables (PLTs) used by tools like Dialyzer, although no actual PLT files or configuration changes are present in this change.

priv · low confidence

The internal scheduling engine has been restructured to use a dedicated \ClockBroadcaster\ (a GenStage producer) that emits time-based events, which are consumed by the \ExecutionBroadcaster\ to manage job execution timelines. This new pipeline replaces the previous execution model, introducing separate stages for job broadcasting, node selection, and execution supervision. The change also introduces a \Quantum.Storage\ behavior for persisting job state and last execution times, and adds configurable run strategies (\All\, \Local\, \Random\) to control how jobs are distributed across cluster nodes.

lib/quantum · high confidence

Added comprehensive test suite for Quantum v2 core components; Added startup validation tests for job configuration.

The project now requires Elixir 1.15 or higher. Dependencies have been updated to align with the 3.5.3 release: \crontab\ is set to \\~\> 1.2\, \gen\_stage\ accepts \\~\> 0.14\ or \\~\> 1.0\, \telemetry\ accepts \\~\> 0.4.3\ or \\~\> 1.0\, and \telemetry\_registry\ is set to \\~\> 0.2\. Development tools \dialyxir\, \credo\, and \excoveralls\ have also been updated to their latest compatible versions.

(dependencies) · high confidence

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

• CAI 51 → 59 (+7.6)
• Rubric changed (rubric-2026.08.19 → rubric-2026.09.15) — scores are not directly comparable.

• Code Health 99 → 99 (-0.1)
• Architecture 100 → 99 (-0.6)
• Maturity 44 → 49 (+4.9)
• Readiness 71 → 83 (+12.1)
• Security 38 → 47 (+9.8)

• Coverage not included — suite not readable by the collector
• Dependency hygiene not measured — no supported dependency manifest was read
• Duplicated block (12 lines × 3) (lib/quantum/clock_broadcaster.ex)
• Duplicated block (13 lines × 2) (lib/quantum/job_broadcaster.ex)
• Duplicated block (9 lines × 2) (lib/quantum/job_broadcaster.ex)
• Duplicated block (9 lines × 2) (lib/quantum/job_broadcaster.ex)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• No exposed public API
• Test reliability not included
• dormant codebase — no living knowledge left to concentrate

• Dependency hygiene PARTLY measured — Mix pinning read, dependency currency not (Hex registry unreachable)
• Documentation: no architecture or design documentation (README.md)
• Duplicated block (12–17 lines × 3) (lib/quantum/clock_broadcaster.ex)
• Duplicated block (13 lines × 2) (lib/quantum/job_broadcaster.ex)
• Duplicated block (7 lines × 2) (lib/quantum/job_broadcaster.ex)
• Duplicated block (8 lines × 2) (lib/quantum/job_broadcaster.ex)
• Duplicated block (8 lines × 2) (lib/quantum/run_strategy/all.ex)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• High: security finding (details withheld)
• …and 25 more

• 6 commits — 6 feature/other, 0 fixes

• (root) — 3 commits
• .github/workflows — 3 commits

• change: Bump step-security/harden-runner from 2.20.0 to 2.20.1 (#713)
• change: Bump step-security/harden-runner from 2.20.1 to 2.21.0 (#714)
• change: Bump step-security/harden-runner from 2.21.0 to 2.21.1 (#718)
• change: Update dependency elixir to v1.20.4 (#716)
• change: Update dependency erlang to v29.0.6 (#717)
• change: Update dependency erlang to v29.1.1 (#719)

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

quantum-elixir/quantum-core 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.