Prototype Session Loop Convention — moved

This convention has moved. It is superseded by and absorbed into

docs/design-tree-loop-convention.md (the Design Tree Loop Convention), which unifies the

design-phase product-design and product-testing skills onto one tree-growing, 5-stage

orchestrator pattern (interrogation → research → design → plan → implement(scoped)).

The intra-skill substep chunking + shared-context-brief mechanics that used to live here are now §2 "The Universal 5-Stage Per-Skill Session Flow" of the new document. The cross-skill phase map, routing rules, approval rules, task rules, and artifact rules are now §§1–8 there, and §0 relates this design loop to the Research Session Loop as two instances of one meta-pattern.

• Per-skill bundles are now DESIGN-TREE-LOOP.md, generated by

scripts/upgrade-design-tree-loop.mjs (this doc's old generator, scripts/upgrade-prototype-session-loop.mjs, is retired).

• docs/research-session-loop-convention.md (business-research Pattern A) is a separate,

unchanged-but-cross-referenced convention and was never part of this one.

Go to docs/design-tree-loop-convention.md.