Rated factory or platform

Tessl

Ratings 2026-10

A spec-driven development framework connects Markdown specifications to implementation targets and tests.

Assessed configuration Published spec-driven development tile and separately documented Verifiers. Offline tile content does not establish offline Verifier execution; the CLI, token and gateway dependencies must be checked together.

Ratings

Evidence: 7 of 7 ratings cite primary sources; 2 are unverified (?).

• Lifecycle traceability

  SDD specs identify code targets and individual test files.

• Versioned system design

  Specs persist and can be maintained in place.

• Tracked drift resolution

  The invoked SDD skill compares specs with code, runs linked tests, fixes issues and rechecks.

• Change impact and alternatives ?

  The reviewed sources do not establish impact/alternative analysis grounded in maintained cross-layer relationships, constraints and baselines.

• Requirement test results

  The invoked SDD verification skill actually runs linked tests and reports pass/fail.

• Delivery audit trail

  Versioned specs and implementation, plus retained PR verifier checks, provide partial provenance.

• Process portability ?

  Vendored SDD plugin/workflow content can be executed by supported coding agents offline.