{
  "iter_id": "mir.3b",
  "date": "2026-05-31",
  "mode": "standard",
  "outcome": "DONE",
  "tasks_total": 4,
  "tasks_completed": 4,
  "reloops_per_task": {
    "1": 0,
    "2": 0,
    "3": 1,
    "4": 0
  },
  "review_loops_spec": 0,
  "review_loops_quality": 0,
  "blocked_reason": null,
  "notes": "Task 1 carried a plan-vs-reality deviation (DONE_WITH_CONCERNS): the plan's Step-2 code block placed the `m_args` construction AFTER `m_callee`, with an implementer-note to 'confirm sig is in scope'. In the actual mir.2 code `sig` is moved into the resolved `Callee` variant (`Callee::Static{..,sig}` / `Builtin{..,sig}`), so `param_mode_at(&sig, i)` cannot run after the move. The minimal faithful fix was to build `m_args` BEFORE the `m_callee` match (so `&sig` is still valid), preserving the plan's body verbatim. Task 3 needed one navigation re-loop: the producer-pin's `find_app_with_fn` first searched for fn-name stem `get`/`get__*`, but the mono pass mangles `RawBuf.get` to `RawBuf_get__Int` (module `raw_buf`); the navigator was retargeted to stem `RawBuf_get` (matching `RawBuf_get__*`). Full workspace suite: 702 passed / 0 failed / 3 ignored (mir.3a was 701/0/3; +1 = the new app_arg_carries_callee_borrow_mode producer pin). Acceptance witnesses green: raw_buf_owned_drop_balances_rc_stats (anon-temp gate, live==0), raw_buf_loop_no_leak_pin, loop_recur_heap_binder_no_leak_pin, print_no_leak_pin; #49 loop_recur_str_binder stays #[ignore]; #51/#53 build guards green. module_def_ail_types fully deleted, grep-clean, zero unused-import warnings (Type/ParamMode retain live readers at the own-param drop)."
}