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Specification Quality Checklist: Harness Engine

Purpose: Validate specification completeness and quality before proceeding to planning Created: 2026-08-17 Feature: spec.md

Content Quality​

  • No unjustified implementation details; Agent Sandbox is an explicit user-selected architectural constraint
  • Focused on user value and business needs
  • Written for non-technical stakeholders
  • All mandatory sections completed

Requirement Completeness​

  • No [NEEDS CLARIFICATION] markers remain
  • Requirements are testable and unambiguous
  • Success criteria are measurable
  • Success criteria are externally verifiable, including the requested pod-isolation boundary
  • All acceptance scenarios are defined
  • Edge cases are identified
  • Scope is clearly bounded
  • Dependencies and assumptions identified

Feature Readiness​

  • All functional requirements have clear acceptance criteria
  • User scenarios cover primary flows
  • Feature meets measurable outcomes defined in Success Criteria
  • Named technology constraints are limited to the requested harness and sandbox scope

Notes​

  • Validation iteration 1 passed on 2026-08-17.
  • Validation iteration 2 passed after Agent Sandbox research on 2026-08-17.
  • Validation iteration 3 passed after thread persistence, long-term memory, and distributed tracing were made explicit on 2026-08-17.
  • Validation iteration 4 passed after the harness-aware agent creation/edit/clone flow, field-addressable validation, switch preservation, active-conversation policy, stale-response handling, accessibility, and BFF write ordering were made explicit on 2026-08-17.
  • Validation iteration 5 passed after Spec Kit generated a dependency-ordered, test-first implementation backlog with exact paths, all eight user-story labels, independent checkpoints, requirement traceability, parallel markers, a critical path, and release gates on 2026-08-18.
  • Product names in FR-008 define the requested integration scope; implementation choices and adapter mechanics are reserved for the plan.
  • “Exact same functionality” is made testable through the existing-test gate, portable baseline, compatibility report, and explicit exclusion of byte-identical model prose.
  • Pod isolation is made testable through unique claim/Sandbox/pod UIDs, stale-generation fencing, credential canaries, egress denial, eviction recovery, and 1,000-binding isolation.
  • State continuity requires a committed external thread head; memory has explicit scope/revision/provenance; tracing has W3C parentage and leak/outage gates.
  • Agent creation preserves the existing five-step editor and legacy default while making harness-first model filtering, compatibility explanations, and exact-payload server validation testable.
  • tasks.md is the execution source of truth: task completion requires its stated test/evidence, and adapter certification remains evidence-derived.