ArcKit 6.8.0

OAA intake as a MANDATORY PRIN hard gate (TOGAF-consistent)

All five OAA overlay commands hard-gate on the global PRIN (Architecture Principles) artefact: if missing, the command stops and points at /arckit:principles — it never renders a missing PRIN as TBD. Bulk builds of OAA targets without PRIN now fail/skip instead of emitting scaffolded artefacts.
Bulk-build recipes (oaa-full.yaml) now declare PRIN as a dependency of every OAA target.

OAA, TOGAF ADM, and agent-architecture intake questions are now ask-always, answer-optional: prefilled dimensions are surfaced for confirmation/override; source-less ones are asked grouped and skippable, rendering TBD when skipped.
OAA intake gains a C208 / TOGAF 10 discovery floor (business vision, capabilities, current-state, technology, pain points) via references/intake-discovery-dimensions.md.

arckit build (BYO LLM): the completion budget is now capped to context_window − prompt − reserve, fixing HTTP 400 … exceeds the model's maximum context length on models whose context window equals max_tokens. New llm.context_window config key.
Registered GLOS and FWRK doc types (converged GLO/GLOSS/FWRK recipe spellings) so /arckit:glossary and /arckit:framework can write conforming filenames; also resolved five further silent recipe-code drift classes.
Kept generated version trees in lockstep on release bumps (hardened bump-version.sh + org-agnostic release-link rewrite).

Detached the Codex standalone distribution to terrygzhou/arckit-codex (per-target publish-owner override in push-extensions.sh; overridable via ARCKIT_CODEX_OWNER). Other distributions are unchanged.