sinasamavati/leptus

Leptus is a REST framework for Erlang that provides a robust infrastructure for building HTTP services. It manages HTTP/HTTPS listeners, routes requests to handlers, and supports static file serving and cross-origin requests. The system includes a configurable logging mechanism for structured HTTP traffic analysis and a parse transform to simplify route definition.

Introduced the 'leptus\_logger' module by adding include/leptus\_logger.hrl, which defines a log\_data record for capturing request and response details such as timestamps, HTTP method, URI, headers, and status code, enabling structured logging of HTTP traffic.

include · medium confidence

The library has been completely rewritten to provide a more robust and feature-rich REST framework for Erlang. This major update introduces a new configuration layer that reads from \App/priv/leptus.config\ files, allowing for flexible handler and option setup. It adds support for serving static files via the \static\_dir\ option, implements a new logging system with customizable access and debug log handlers, and improves route handling by sorting dispatch rules for correct Cowboy integration. The API has been updated to include \start\_listener/2,3,4\ for managing HTTP/HTTPS listeners, \upgrade/0,1,2,3\ for hot-swapping handlers, and \running\_listeners/0\ for monitoring. Additionally, the framework now supports cross-domain requests (CORS), optional debug logging with colored console output, and a parse transform (\leptus\_pt\) that automatically generates route and method definitions from handler modules.

src · high confidence

Added comprehensive test suites for Leptus components; Added test fixtures for HTTP/1.1 and HTTP/2 handlers; Added test fixtures for the leptus\_pt parse transform.

The project has been updated to use Cowboy 2.4.0 and Jiffy 0.15.2, replacing the previous versions (Cowboy 0.8.6). This upgrade brings compatibility with newer Erlang/OTP versions and improved HTTP handling capabilities.

(repo-wide) · high confidence

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

• CAI 49 → 61 (+11.8)
• Rubric changed (rubric-2026.08.19 → rubric-2026.09.15) — scores are not directly comparable.

• Code Health 100 → 99 (-0.6)
• Architecture 100 → 100 (+0.0)
• Maturity 35 → 48 (+12.3)
• Readiness 26 → 47 (+21.3)
• Security 100 → 92 (-8.0)
• Event Sourcing 100 → 100 (+0.0)

• Coverage not included — suite not readable by the collector
• Dependency hygiene not measured — dependency manifest found but not parsed for hygiene
• No exposed public API
• Test reliability not included
• complexity unreadable for .erl, .hrl — churn × complexity hotspots could not be measured
• dormant codebase — no living knowledge left to concentrate

• Coverage not measured — no coverage collector is wired up
• Dependency hygiene PARTLY measured — rebar3 pinning read, dependency currency not (no rebar.lock-pinned Hex declaration to grade)
• Duplicated block (20–22 lines × 2) (src/leptus_handler.erl)
• High: security finding (details withheld)
• No dependency lockfile committed (rebar.config)
• TodoComment (src/leptus_handler.erl)
• leptus_handler.authorization (cognitive 16) (src/leptus_handler.erl)

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

sinasamavati/leptus 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.