[teo1747]

Stacked on #38. This completes the M2-11 checklist item, and with it every M2 checklist box.

Problem and result

M2-11 asks for the delivered scope to be reconciled with the docs, configuration, model, complexity annotations and requirement cards, and for the exit and the remaining M3a work to be recorded.

• docs/engineering/m2-exit-review.md records:
  • each checklist item with its PRs (Make clangd and clang-tidy usable in the editor #21–docs(m2-11): M2 exit review #39) and evidence;
  • the reconciliation;
  • the five defects found during M2 and where each is fixed;
  • the CI state;
  • the limits carried out of M2;
  • the remaining M3a work.
• STATUS is reviewed as of the exit:
  • binding sources (semaphores, event flags, message queues), object lists for every type, trace IDs 31–44 and model coverage are brought up to date;
  • coverage reports no longer count as unimplemented.
• Roadmap. The M2 entry now says what was delivered for review and what was not.
• Configuration guide. Lists the native-coverage preset and every new kernel object option with its per-profile defaults.
• Checklist and changelog. The last three checklist boxes are ticked, and the changelog has an entry.

All M2 contract changes stay open for the project owner's review: amendments A29–A61, and ADR-045 to ADR-048 plus ADR-050.

Validation

• Docs. Docs tests OK; the local docs build shows only the nine Doxygen-shim function-pointer warnings already disclosed in feat(work): work queues on kernel threads (M2-08) #35–test(m2-10): integrated campaign, coverage, and two scheduler/sanitizer fixes #38.
• Lint. Banned-pattern check 0 findings.
• Unchanged since test(m2-10): integrated campaign, coverage, and two scheduler/sanitizer fixes #38. Kernel and test code are untouched, so test(m2-10): integrated campaign, coverage, and two scheduler/sanitizer fixes #38's results stand: 21/21 local configurations, 158,800 differential runs with no divergence, and coverage of 91.4% of lines and 72.5% of branches.
• CI. Make clangd and clang-tidy usable in the editor #21–docs(m2-11): M2 exit review #39 pass every required check, including the new native-coverage job.
• Not run. Hardware-in-the-loop and physical timing: no board.

Review checklist

• Each authored commit has my matching Signed-off-by trailer (git commit -s); DCO is separate from cryptographic signing.
• Scope and implementation limits are reflected in the user/API documentation and Project status where applicable.
• Contract changes update requirements/specifications; architecture decisions have an ADR. (None new; the review lists the open ones.)
• Kernel semantics changes update the reference model and conformance evidence in the same PR. (No kernel change.)
• User-visible changes have an Unreleased changelog entry, or Validation explains why none is needed.
• Required checks pass, review conversations are resolved, and known failures are disclosed before merge.