Story P: Ancillary doc updates for vBRIEF-centric model

[MScottAdams]

Summary

Update all ancillary framework documents for the vBRIEF-centric document model introduced in RFC #309. Story D (#313) covers main.md and AGENTS.md; this story covers everything else.

Tier 2 -- depends on Story A (#310).

Scope

Core reference docs

• REFERENCES.md -- heavy rewrite: new file taxonomy (lifecycle folders, scope vBRIEFs, PROJECT-DEFINITION), updated loading scenarios and reference chains, removal of specification.vbrief.json / PROJECT.md references
• README.md -- skill names (deft-* -> deft-directive-*), directory structure, workflow references
• CONTRIBUTING.md -- process and skill name references

Workflow docs

• commands.md -- change lifecycle references updated for scope vBRIEF model
• strategies/interview.md -- spec generation flow now produces scope vBRIEFs, not specification.vbrief.json + SPECIFICATION.md
• strategies/map.md -- references to old document model
• strategies/speckit.md -- references to old document model
• templates/make-spec.md -- spec generation template rewritten for scope vBRIEFs

Context and resilience docs

• context/working-memory.md -- plan.vbrief.json + scope vBRIEF relationship (D15)
• resilience/continue-here.md -- continue.vbrief.json + scope vBRIEF relationship (D15)
• context/long-horizon.md -- multi-session patterns updated for lifecycle folders

Tool config

• .greptile/ config -- file path references if present

Acceptance Criteria

• All files above updated to reference the new vBRIEF-centric model
• No remaining references to specification.vbrief.json as singular spec source (except in deprecation context)
• No remaining references to PROJECT.md as project config (except in deprecation context)
• All deft-* skill name references updated to deft-directive-*
• ask check passes

Related

• RFC RFC: vBRIEF-centric document model for Deft Directive #309 (authoritative design decisions)
• Story A Story A: Update vbrief.md with new vBRIEF-centric document model #310 (vbrief.md -- must land first)
• Story D Story D: Core doc updates (main.md, AGENTS.md) for vBRIEF-centric model #313 (main.md + AGENTS.md -- parallel Tier 2 work)

[MScottAdams]

Closed by squash merge of PR #346 into phase2/vbrief-cutover. All 11 ancillary framework docs updated for vBRIEF-centric model.