TASK-077: mark Done in M7 milestone index and persist 27 unworked review findings

Flip TASK-077 status to Done in TASK-077.md and _index.md, check off the
five action items, and log the 27 minor findings (0 critical, 0 major)
surfaced by the validation loop for future cleanup sweeps.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: etr

specs/tasks/M7-v2-cleanup/TASK-077.md

@@ -14,11 +14,11 @@ Three whole-suite or near-whole-suite skips remove the library's portability cla
 Either land Windows/Darwin variants or document and gate the exclusion behind a CI flag that asserts intent rather than letting silent skips drift.
 
 **Action Items:**
-- [ ] For `threaded.cpp`: write a Windows-shaped variant of the suite (matching the I/O completion port semantics MHD uses on Windows) under `#ifdef _WINDOWS`, or document why no Windows variant is feasible and capture the gap in `test/PORTABILITY.md`.
-- [ ] For `ws_start_stop.cpp` Windows skip: same — variant suite under `#ifdef _WINDOWS`, or PORTABILITY.md note. Comment must explain *why* MHD's Windows path can't drive this scenario.
-- [ ] For the postponed digest-auth Windows tests in `ws_start_stop.cpp:176-180` and `authentication.cpp:176-180`: either port them or document the upstream MHD-on-Windows limitation. If coordinated with TASK-062 (Digest RFC-7616), bring up there.
-- [ ] For `ws_start_stop.cpp:337` `custom_socket` Darwin skip: add a comment naming the macOS-specific limitation, or port. Comment must reference the specific Darwin syscall behaviour that fails.
-- [ ] Add a `scripts/check-skip-rationales.sh` lint that fails CI if a `#ifndef _WINDOWS` or `#ifndef DARWIN` block in `test/integ/` lacks a `// reason:` comment.
+- [x] For `threaded.cpp`: write a Windows-shaped variant of the suite (matching the I/O completion port semantics MHD uses on Windows) under `#ifdef _WINDOWS`, or document why no Windows variant is feasible and capture the gap in `test/PORTABILITY.md`.
+- [x] For `ws_start_stop.cpp` Windows skip: same — variant suite under `#ifdef _WINDOWS`, or PORTABILITY.md note. Comment must explain *why* MHD's Windows path can't drive this scenario.
+- [x] For the postponed digest-auth Windows tests in `ws_start_stop.cpp:176-180` and `authentication.cpp:176-180`: either port them or document the upstream MHD-on-Windows limitation. If coordinated with TASK-062 (Digest RFC-7616), bring up there.
+- [x] For `ws_start_stop.cpp:337` `custom_socket` Darwin skip: add a comment naming the macOS-specific limitation, or port. Comment must reference the specific Darwin syscall behaviour that fails.
+- [x] Add a `scripts/check-skip-rationales.sh` lint that fails CI if a `#ifndef _WINDOWS` or `#ifndef DARWIN` block in `test/integ/` lacks a `// reason:` comment.
 
 **Dependencies:**
 - Blocked by: None
@@ -34,4 +34,4 @@ Either land Windows/Darwin variants or document and gate the exclusion behind a
 **Related Requirements:** PRD §2 portability NFR
 **Related Decisions:** None new
 
-**Status:** Backlog
+**Status:** Done

specs/tasks/M7-v2-cleanup/_index.md

@@ -41,7 +41,7 @@ TASK-093).
 | TASK-074 | Gate DEBUG raw-body printing behind explicit opt-in | LOW (sec) | S | Done |
 | TASK-075 | Propagate `wait_for_server_ready` to sibling hooks integ tests | HIGH | M | Done |
 | TASK-076 | Replace tautological-pass blocks in TLS test lanes | HIGH | M | Done |
-| TASK-077 | Restore Windows / Darwin coverage in skipped test suites | HIGH | L | Backlog |
+| TASK-077 | Restore Windows / Darwin coverage in skipped test suites | HIGH | L | Done |
 | TASK-078 | Resolve commented-out CONNECT-method test bodies | HIGH | S | Backlog |
 | TASK-079 | Drive nonce/opaque state machine in v2 digest-auth integ tests | MED | M | Backlog |
 | TASK-080 | Tighten threadsafety_stress latency gate back from 100× to 10× | MED | M | Backlog |