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Night 2 is Tessera’s second coordinated release. It builds on Night 1: the same courses, the same block-based lessons, the same rule that AI never publishes without a person reviewing it. Night 2 adds accessibility as a native part of authoring and learning, a versioned API for scripts and outside tools, AI drafting at any scope, and assignments with grading.

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For administrators

  • Institution accessibility dashboard: the score and issue mix across every course, a trend over time, and a CSV export mapped to WCAG 2.2.
  • Publishing policy: a minimum accessibility score and a list of blocking issue severities. A lesson or file below the line can’t be published; the server enforces it, not just the screen.
  • API tokens: scoped tokens for scripts and outside tools, created on a tokens page and shown once.
  • Invitations: coming later in Night 2 — real accounts through Cloudflare Access, replacing the demo persona picker for day-to-day sign-in. The persona picker stays for local testing and as an administrator’s “view as.”

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For instructors

  • Accessibility score and issues on every lesson and every uploaded document, next to publish readiness, with AI-assisted alt text (lessons, Word, and PowerPoint), table headers, and document metadata.
  • New content types: documents, tables, scenarios (branching decision practice), links, videos, and uploaded files, each with its own accessibility check.
  • AI drafting at any scope: generate a whole course, a module, a lesson, or a single element — including a video script — from a scope picker, with progress as drafts come in. Everything lands as a labeled draft; nothing publishes on its own.
  • Assignments and grading: text, file, or link submissions; an optional rubric; a grading view with AI-drafted feedback the instructor edits and keeps; a gradebook with CSV export.

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For students

  • Accessible formats on every PDF, Word, and PowerPoint file: a reading version, an e-book, an audio version, and a searchable version for scanned PDFs (OCR).
  • Assignments: submit, see status and due dates, and get one resubmission before the due date.
  • The hint-first tutor: coming later in Night 2 — hints before answers, and never an answer on graded work.

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Tessera Access

Tessera Access checks accessibility where the content already lives: on the blocks that make up a lesson, and on uploaded PDF, DOCX, and PowerPoint files.
  • Lessons and assignment instructions are checked live in the editor and again at the publish gate: missing alt text, skipped heading levels, vague link text, tables without a header row, videos without captions or a transcript, and more.
  • Documents are parsed in the Worker: PDFs for a real tag structure, extractable text, and image alt text; Word and PowerPoint files for language, headings, image descriptions, table headers, and text contrast.
  • Every issue names its WCAG 2.2 success criterion, level, and severity.
  • Score: 100 − Σ penalty × min(count, 3) per severity — critical 30, serious 15, moderate 8, minor 3 — so three or more of the same issue count as three. See Tessera Access for the grade bands.
  • Fixes are new versions. Applying a fix — alt text, a table header, corrected metadata, OCR — saves a new version of the document; the original is never overwritten. AI-suggested fixes are drafts a person reviews and keeps, the same rule as every other AI output (D-003). Unreviewed AI drafts block publishing but don’t count against the accessibility score itself.
  • Accessible formats — reading version, e-book, audio, and OCR text for scanned PDFs — are generated on request and cached per document version.

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The API

Tessera now has a versioned, token-authenticated API for scripts, integrations, and administrators who want to work outside the app.
  • /api/v1: every operation is documented from one contract, with runtime validation and a generated OpenAPI reference.
  • Scoped tokens (tsk_…): administrators, and instructors for their own courses, create tokens with only the scopes they need, shown once at creation.
  • Conventions: cursor pagination on lists, an Idempotency-Key header for safe retries on creates, per-token rate limits with Retry-After, and an X-Request-Id on every response.
  • See API for authentication, scopes, errors, and a walkthrough.

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Quality

  • The accessibility audit and the no-stripe guard run on every push, as in Night 1.
  • New flows get their own acceptance journeys: creating a course by API, scanning and fixing a document, generating drafts at a chosen scope, and grading a submission.