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SGQuill Learn · 2026

A standalone SCORM 1.2 / 2004 runtime

A spec-complete SCORM runtime with per-launch origin isolation and an ADL conformance gate in CI, so broken third-party content can’t take the platform down.

Senior Fullstack · architect

SCORM versions, spec-complete
1.2 + 2004SCORM versions, spec-complete
conformance gate in CI
ADLconformance gate in CI
learner presence via Redis + SSE
Livelearner presence via Redis + SSE

Context

The situation

Courses on the platform include third-party SCORM packages: content the team does not control, running inside the learning experience.

The problem. Running SCORM content inside the main app meant a misbehaving package could break sessions or leak across launches, and progress commits were easy to lose silently.

Approach

Key decisions

  1. 01

    Separate service, separate origin

    The runtime is its own service, and every launch gets its own subdomain origin, isolating third-party content from the platform and from other launches.

  2. 02

    Spec-complete adapters

    Full SCORM 1.2 and 2004 API adapters with suspend/resume sequencing state, rather than the subset most packages happen to use.

  3. 03

    Conformance as a merge gate

    An ADL conformance suite runs in CI, so regressions are caught before release.

How it works

  1. 1

    Learner opens course

    On the main platform

  2. 2

    Per-launch origin

    Unique subdomain per launch

  3. 3

    SCORM runtime

    1.2 / 2004 adapters, suspend/resume

  4. 4

    Commit store

    Progress persisted per session

  5. 5

    Presence monitor

    Redis + SSE for staff dashboards

Launch isolation (simplified)

Outcome

Results

  • Third-party content failures no longer affect the main platform.
  • Root-caused a silent method rename that dropped an entire session’s commits, and missing wildcard DNS behind per-launch subdomains.
  • Real-time learner presence and mastery monitor on Redis + SSE for non-technical staff.

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