{
  "iter_id": "mir.5",
  "date": "2026-06-01",
  "mode": "ledger-only",
  "outcome": "DONE",
  "tasks_total": 5,
  "tasks_completed": 5,
  "reloops_per_task": { "1": 0, "2": 0, "3": 0, "4": 0, "5": 0 },
  "review_loops_spec": 0,
  "review_loops_quality": 0,
  "blocked_reason": null,
  "notes": "mir.5 is the typed-MIR milestone's closing iteration. At iteration entry the orchestrator verified the CODE half was already complete: all four named re-derivers (synth_with_extras, synth_arg_type, type_home_module, codegen's infer_module_with_cross) are grep-clean; lower_workspace takes &MirWorkspace; MTerm::New is unreachable!() (raw-buf.4 desugars Term::New to (app T.new …) before codegen); #51/#53 are closed (element-type residue converged via the #51/#53 fixes ee4107c/420f75f + the raw-buf.4 New-desugar). So mir.5 shipped NO code — it is ledger-only ratification of the boundary the code already holds. Authored design/contracts/0018-check-codegen-boundary.md (invariant: codegen re-derives nothing; MIR is total over what check proved; ratifier crates/ailang-check/tests/lower_to_mir_ty.rs::callee_classification_builtin_and_static). Retracted 0013-typeclasses invariant 2 (codegen no longer re-resolves cross-module names; lower_to_mir::classify_callee resolves once into Callee::Static). Corrected design/models/0003-pipeline.md MIR line to name the real stage + a boundary paragraph. Updated design/INDEX.md: added the boundary row, re-pointed qualified-xref at lower_to_mir + 0018. Made the codegen_import_map_fallback_pin.rs doc-comment honest (it now pins the post-mono AST precondition classify_callee relies on, not a codegen-side resolution that no longer exists; assertions unchanged, stays green). Added a mir.5 refinement note to spec 0060 recording the early code convergence. Full workspace suite green (exit 0, 0 failed, 2 ignored); 708 passed carried from mir.4 (no test added/removed; the single .rs edit is a doc-comment). RESIDUAL (deferred to user): the milestone #7 (raw-buf) subsumption note is an external Gitea write the /boss auto-mode classifier correctly declined to make autonomously — surfaced to the user with the exact note text. #51/#53 already closed; #49 closes on push of c5fd16a. Acceptance criteria 1-7 of spec 0060 all met. Milestone code+ledger complete; the end-to-end milestone fieldtest is the remaining deliberate manual close-gate."
}