docs(buglog): P0 defects fixed (bug-1936..bug-1955; 1936 and 1955 partial), bug-1956 cannot-reproduce

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.wolf/bugs/bug-1954.md

@@ -1,8 +1,8 @@
 ---
 id: "bug-1954"
-status: "open"
+status: "fixed"
 status_updated: "2026-10-10"
-status_note: "newly logged"
+status_note: ""
 component: "worker"
 severity: "wrong-result"
 timestamp: "2026-10-10T08:46:07Z"
@@ -11,6 +11,7 @@ occurrences: 1
 files: ["src/worker/src/xcecd_worker.c"]
 tags: ["worker", "job-control", "signal"]
 related: ["bug-1940"]
+fix_commits: ["148557a5"]
 ---
 
 # bug-1954: xcecd_worker sends SIGTERM for a KILL request without force and SIGSTOP for a TSTP request
@@ -55,15 +56,16 @@ do so.
 - Frequency: deterministic by code reading (not yet run)
 - Evidence: the code quoted in Description; no logs kept.
 ## Root cause
-TODO: required for fixed/partial
+`worker_signal_callback()` (`src/worker/src/xcecd_worker.c`) mapped TERM/KILL to `force ? SIGKILL : SIGTERM` and STOP/TSTP to SIGSTOP; the apiserver's default stop signal was TSTP, relying on that substitution.
 
 ## Fix
-TODO: required for fixed/partial
+New `job_signal_to_deliver()` (`src/worker/src/job_signal.c`, `include/job_signal.h`) delivers the requested signal; only a forced TERM escalates to SIGKILL; the callback uses it. The apiserver's default stop signal becomes SIGSTOP (`backend/convert_pure.go` `defaultActionSignal`, `models.DefaultActionSignal`), so a plain stop still suspends jobs that ignore SIGTSTP; the bug-1940 test pinning stop=20 now expects 19.
 
 ## Verification
-- Test: TODO: name + file; RED before the fix, GREEN after
-- Suites: TODO: suite results and build profile
-- Live: TODO: soak/deploy run, or n/a and why
+- Test: `test_requested_signal_is_delivered` (`src/worker/testsuite/test_job_signal.c`): RED `test_job_signal.c:14: FAIL: Expected 9 Was 15` (KILL without force), GREEN after; `TestJobCtrlParams_PlainStopSendsSigstop` (`backend/jobctrl_params_test.go`): RED `DefaultActionSignal[stop] = "TSTP", want STOP`, GREEN after.
+- Suites: `xce-build.sh all asan xce.build --incremental` on the merged branch, 2026-10-10: all C suites Ok 155 / Fail 0, frontend Go unit tests ok, xceadmin tests ok; apiserver `CGO_ENABLED=0 go test ./...` (incl. middleware, router, cmd) ok
+- Live: n/a: unit/fixture-level verification only; no live deployment was run (follow-up)
 
 ## References
-- Related: none
+- Fix commit: `148557a5` (on `scheduler-framework`; worker-branch original in the merge)
+- Review: `.kiro/reviews/project-gap-review-2026-10-10.md`