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-1940.md

@@ -1,8 +1,8 @@
 ---
 id: "bug-1940"
-status: "open"
+status: "fixed"
 status_updated: "2026-10-10"
-status_note: "newly logged"
+status_note: ""
 component: "apiserver"
 severity: "wrong-result"
 timestamp: "2026-10-10T08:14:46Z"
@@ -11,6 +11,7 @@ occurrences: 1
 files: ["src/frontend/apiserver/controllers/jobs.go", "src/frontend/apiserver/backend/clib.go"]
 tags: ["apiserver", "job-control", "signal"]
 related: []
+fix_commits: ["4d2e80c4"]
 ---
 
 # bug-1940: job control ignores the requested signal and the force-kill flag (apiserver to controller)
@@ -36,15 +37,16 @@ The control handler passes a JSON event string as content (`controllers/jobs.go:
 - Frequency: deterministic (by code reading; confirmed by the RED test of the fix)
 - Evidence: the code sites quoted in Description; no logs kept.
 ## Root cause
-TODO: required for fixed/partial
+`ControlJob` (`backend/clib.go`) treated its content (a JSON event) as a signal name, so the lookup always missed and fell back to TERM/TSTP/CONT; it also hard-coded `force = 0`, `ckpt.kill = 0` and never set the checkpoint method. Pre-existing.
 
 ## Fix
-TODO: required for fixed/partial
+`backend/convert_pure.go`: new pure `jobCtrlParams()` parses the JSON event or a bare signal name/number, validates it against `JobSignalMapTable` (error instead of fallback), maps force_kill to the signal's force (kill) or the checkpoint's kill flag, and passes the method; `backend/clib.go` fills the C structs from it. Worker-side substitution of the delivered signal was a separate defect, bug-1954.
 
 ## 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: `TestJobCtrlParams_*` (`backend/jobctrl_params_test.go`): RED `jobctrl_params_test.go:34: kill USR1 force_kill: got signo 15 force 0, want signo 10 force 1` and the checkpoint case, GREEN after (6 tests).
+- 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: `4d2e80c4` (on `scheduler-framework`; worker-branch original in the merge)
+- Review: `.kiro/reviews/project-gap-review-2026-10-10.md`