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NFR milestone, no new domain. Research is a codebase-grounded inventory: - 11 files to archive (4 pre-execution v1.26 artifacts + 3 phase verifications/review + 1 evidence snapshot + 3 durable refs superseded by STATE.md/NORTH_STAR/archive + 1 consumer ROADMAP). - 12 files kept active (no-edit: live code paths, durable refs). - 3 files kept active (fix-only: PROJECT.md, ROADMAP.md, archive/README.md). - STATE.md backfill sources: regression_verify.py, registry.json, REQUIREMENTS traceability, CHECKPOINT, git log, PROJECT decisions. - Persona roster: lead-developer only (docs/chore milestone). - 4 risks, all Low-Medium with documented mitigations. ---ci--- project: acdl phase: 0 milestone: v1.27 status: research ---ci---