Roadmap position: #11401 landed the prepare-side root fix; #11217 superseded; parallel realization re-sequenced

[briansrls]

Follow-up to #11397. One more dated TicketUpdate (2026-09-15) on v1-verification-ledger's updates thread in gunbc.roadmap_authority:

• gunbc#11401 landed on main (fierce-seal-607): R1 recomposes Share native resolution invariants once per context #11217 (resolve no longer rebuilds the language model, the quadratic root-validation scan, or the full symbol index per module — the prepare-side duplication the perf sequence was built around), C1/C1b (token-stream digest), C2 (span-index merge per memo hit), C3 (prepared choice dispatch), C4 (lexer rule dispatch). Evidence cited by the PR's own instrument (bounded concurrent A/B, rows byte-identical at every step; no full fold ran; exact-head T fold capped at 30 min as the landing receipt).
• Share native resolution invariants once per context #11217 closed unmerged as superseded (landing side chat ruling).
• Consequence for the approved sequence: counts-confirm-repetition is discharged by construction; parallel realization (Draft: Phase 1 model for native-route parallel realization #11385, landing with the fail-closed width precondition) follows PREPARED-CHOICE-0 (adhoc-583fffb6-357) and body lowering's repeated subtree search.
• Denominate the enrolment margin in eval steps: the plan, and Phase 1's model #11366 (enrolment margin in eval steps, Phase 1) landed.

Typechecked on srv1 with a gunbc built from the branch; roadmap_ticket_brief_violations reports only pre-existing over-budget boundaries on main (2-scm-native-authority-program, frontend-eval-training-program, fleet-mtcollins1-first-host, cardinality-vertical-slice), none touched here. ROADMAP.md regenerates by heal.

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