Completed Designs and Investigations

This section preserves designs and investigations that helped SDLX reach its current architecture but no longer define current requirements or priorities. They remain available so readers can understand earlier decisions and the acceptance criteria used at the time.

Archived documents are immutable historical context unless a correction is needed to prevent a safety, provenance, or navigation error. Do not treat their status statements, roadmap language, process counts, profile versions, or implementation snapshots as current facts.

For current work, use:

• Main Product Design for accepted behavior;
• Current Progress for implementation and priorities;
• schemas, typed contracts, code, and tests for current interface behavior;
• Release Records for dated qualification evidence.

Completed Product Designs

Document	Language	Historical purpose
archive/prds/agent-first-system-design-prd-2026-08-03-detailed.md	English; repository only	Detailed product, architecture, delivery, and qualification snapshot retained when the main PRD was condensed
archive/prds/agent-native-virtual-lab-prd-2026-08-03-detailed.md	Chinese and English; repository only	Detailed source snapshot retained outside the public Web build when the current PRD was condensed
Top-Level Agent Golden Loop PRD	English	Pre-PRISM Golden Loop P0 baseline
ASCEND Primary Interface PRD	English	Completed ASCEND P0-P2 interface scope
PACE-PRISM-ASCEND Closed-Loop PRD	English	Completed nine-gate analysis-loop P0
archive/prds/composer-agent-session-sandbox-prd.md	Chinese; repository only	Implemented Composer sandbox design
archive/prds/pace-package-preflight-prd.md	Chinese; repository only	Early PACE preflight proposal

Past Investigations

Document	Language	Historical purpose
archive/investigations/ascend-composer-prism-agent-runtime-investigation.md	Chinese; repository only	2026-07-20 runtime, context, tool, Skill, and sandbox investigation