# STATUS > Single source of truth for resuming work. Read this FIRST when starting a session. > Update at the end of every work phase so the next `/clear` resumes in 1 read. --- ## ✅ Done (2026-10-08, all pushed on `scheduler-framework`, HEAD `f69390a3`) - **scheduler-sim-decision-trace: implementation complete, feature validation GO** (spec phase `implementation-complete`). The `--sim --interactive` REPL gains `trace on all|job SEL... [level summary|full] [lines N] [file PATH]`, `trace off`, `trace status` and `info trace `. Each traced decision prints selection, requirement branching, cluster-wide checks, plans/positions/host verdicts and the outcome, inline and to a trace file. Latest record per job is kept (64 MiB bound). - 27 tasks: 1.1–6.4, plus 2.4, added mid-run to split the trace sources under the 800-line cap. Each task was independently reviewed. - Sources: core side `sched_trace.c`/`_scan.c`/`_capture.c`/`_outcome.c` + `sched_trace_internal.h` + `include/sched/trace.h` (790 lines, split before growing). REPL side `repl_trace.c`/`_emit.c`/`_store.c`/`_render.c`/`_render_outcome.c`. Hooks via `SCHED_TRACE(core, call)`. The live driver never traces. - Proof: `test_trace_equivalence` (off/summary/full/subset × step/continue × 2 replays) gives identical decisions, pend reasons, recordings, snapshots, verify output and accounting. Also `test_repl_trace_e2e`, `test_trace_error_paths` (7 injected faults), `test_trace_bounds`, and the trace-off baseline `test_repl_trace_baseline`. - Validation round 1 closed coverage gaps 1.5/7.3/8.1/8.7/10.4/11.1 and synced design.md. Two criteria, 10.3 (job->accounts) and 11.4 (live), are covered only indirectly. - **Bugs fixed and closed on Gitea (#348–#355):** - bug-1923: sim dropped shared/per-worker resvals from snapshots. Invariant audit (scheduler dims 1/4) clean. - bug-1924: clock test failed when the PID contained 1999. - bug-1925: `quit` mid-session freed trace settings while the allocator ran. - bug-1926: `break ... jobid=` matched only raw decimal; now dashed, `X[k]`, `X[a-b]` and raw all work, and an invalid id is rejected. - bug-1927: pend reasons were repeated per host per plan; `add_job_preason_once` dedups them; the bounds test went from 19 s to 2 s. - bug-1928: REPL iterator leaks; standalone ASAN `--sim` now exits 0 with leaks on. - bug-1929: continue rollup `jobids=` was empty or pend-only; it now lists every affected job (repl-verbosity Req 2.1/3.2). The baseline transcript changed only in 2 `jobids=` lines. - bug-1930: `trace on job` now accepts raw decimal ids. - Verification: full all-components ASAN build 148/148 meson tests, xceadmin 373, Go ok (after bug-1927); scheduler suite 118/118. - Earlier (2026-10-03..07, already pushed): HA fixes bug-1914/1915/1917–1922, bug-1736 run-usage exposure, harness fake-worker fixes, soak WAL-layout gate (Gitea #338–#346). --- ## 🚀 Next phase **Goal:** _None active._ Pick from the open items below. ### Open items (not yet actioned) - **Review + merge PR #347** (https://gitea.shenrs.eu/nexa/xce/pulls/347, `rshen:scheduler-framework` -> `nexa/xce` `develop`): it now also carries the decision-trace feature and bug-1923..1930 (63+ commits since `33437a39`). `master` (`fdfc42f1`) is 2 commits ahead of `develop` and was not merged into the branch. - **Checks needing a host with systemd/dbus** (this container has none): a running array element prints the right `XCE_JOBINDEX`; bug-1908's kept signal reaches a real (non-virtual) worker over IPC at RUNNING; real `xcecd` (cgroup-measured) run usage in `xcecli jobs list -l` end to end. - **Specs awaiting the next phase:** design review -- `xce-node-manager`; requirements written -- `job-status-detail-display`, `scheduler-preemption`; initialized -- `commit-batch-window`, `resource-distribution-mapping`; brief -- `component-rejoin-resync`. - **Roadmap backlog (briefs only):** application-profile → job-sandbox-execution → job-sandbox-multinode; job-time-window → job-dependency → job-dependency-insight; rbac-persistence; scheduler-alter-pend-reasons; controller-job-cleanup. - **Small, optional:** - The fake worker reports finished jobs as `unrecognized` in its resync answer. - `--truncated-fence` is opt-in. - Decision-trace follow-ups: - capture's `key_find`/`vget` run without the RTTI read lock (safe in sim lock-step); - `trace.h` is at 790/800 lines; - the snapshot save silently skips a shared resval with no matching resource (snapshot.c ~446), while the per-worker side warns; - most REPL tests still run with `detect_leaks=0` because their fixtures don't tear down. ### Files to create / edit - _none pending_ ### Open decisions - **REST job output for jobs with a custom `out_file`/`err_file`**: the worker never writes those paths (always `/tmp/job__task.out`), so since bug-1508 `GET /jobs/:id/output` for such a job returns a permission error from the worker. Either the apiserver's `resolveOutputPath()` (controllers/output.go) always targets the worker's own output file, or the worker starts honouring `out_file`. Waiting on the user. - **Bug records not mirrored to Gitea:** ~400 older records plus bug-1885–bug-1908 (bug-1736, bug-1914/1915/1917-1922 and bug-1923–1930 are mirrored). A sync without `--since`/`--ids` would create an issue for each. Default: leave them off Gitea. --- ## 📁 Active architecture - **Stack:** Go API/CLI tier (`src/frontend/apiserver`) fronting C daemons (`src/controller`, `src/worker`, `src/scheduler`); Meson-based build via `src/tools/xce-build.sh`, hermetic nix dev shell. - **Bug tracking:** `.wolf/bugs/*.md` (records) → `scripts/buglog.py` (CLI + checks) → `.wolf/buglog.json` (generated index) → `scripts/gitea-sync.py` (Gitea issues in `nexa/xce`). - **Local-only, never committed:** `.claude/settings.json` (hook paths rewritten for this machine), `data/` (450 MB replays/logs). --- ## 🔧 Useful commands ```bash python3 scripts/buglog.py list --open | new ... --binary | check | status fixed --commit ln -sf ../../scripts/git-hooks/pre-commit .git/hooks/pre-commit # once per clone XCE_HA_ROUNDS=6 nix develop ./src --command bash .claude/skills/xce-test-ha/run-ha-soak.sh --sequential nix develop ./src --command bash .claude/skills/xce-test-ha/run-ha-soak.sh --truncated-fence python3 .claude/skills/xce-test-ha/wal-layout-check.py # WAL segment layout (bug-1920) python3 scripts/gitea-sync.py --dry-run --bugs --since [--ids bug-N,bug-M] # dry-run first bash src/tools/xce-build.sh scheduler --jobs 12 --incremental # ASAN build dir is src/xce.build ASAN_OPTIONS=detect_leaks=0 XCE_TRACE_E2E_DUMP=1 src/xce.build/scheduler/testsuite/sched_repl_trace_e2e_test # dump traced transcripts ```