myxce/reports/aug03-aug09-2026.md

XCE Project Status — Aug 03 – Aug 07, 2026

TL;DR

scheduler-core: fully implemented. All 13 task groups landed across the week — picker plugin contract, core extraction, normal-mode driver wiring, replay wire format, snapshot save/load, recording lifecycle, admin opcode dispatch, simulation mode, interactive REPL, and HA soak regression. One controller bug fixed (bug-1505: WalCatchupEntry SIGSEGV). Aug 08 (today) was documentation cleanup: deployment guide, CLAUDE.md sync, and a broad audit of 33 closed specs. The scheduler-framework feature branch is now implementation-complete.

Commits by day

Aug 03 (Sun) — Group 1 (picker contract) + Group 2 (builtin_fcfs) + Group 4 (core extraction) + Group 5 (driver wiring)

10 commits, closing out Groups 1–5:

• Group 1 — Picker Plugin Contract (tasks 1.1–1.3): defined job_elect_fn plugin contract, registered picker plugin category, added picker configuration fields
• Group 2 — builtin_fcfs (tasks 2.1–2.6): lifecycle, state-change hooks, session/post-allocation hooks, wired as registered default picker, scheduling-loop ordering guard regression tests, data-sharing invariant audit
• Group 4 — Core Extraction (tasks 4.1–4.6): extracted xce_sched_core_t from monolithic scheduler_t, pinned jbuf capacity + kvmgr determinism audit, event batch push interface (CONFIG_PUSH decomposition approved round 2), session-start signal + decision callback, clock virtualization + session timing, core contract test (full push-go-drain-end cycle)
• Group 5 — Driver Wiring (tasks 5.1–5.2): normal-mode event translation path, decision publishing + mode-selection wired into main.c

Aug 04 (Mon) — Group 6 (HA soak gate) + Group 7 (replay wire format) + Group 8 (snapshot)

9 commits:

• Group 6 (task 6): Phase 2 HA soak regression gate closed
• Group 7 — Replay Wire Format (tasks 7.1–7.5): replay stream envelope schema, event payload types (JobStateChangeEvent), decision payload types + snapshot schema (SnapshotData, ReplayDecision), admin opcode schema, round-trip coverage gap (1087/1087 tests pass)
• Group 8 — Snapshot (tasks 8.1–8.2): snapshot save/load with cross-thread concurrency fix, -EBUSY guard against active session

Aug 05 (Tue) — Group 9 (recording lifecycle) + Group 10 (admin dispatch + xceadmin CLI)

9 commits:

• Group 9 — Recording Lifecycle (tasks 9.1–9.5): directory provisioning + path validation, record start/stop lifecycle (O_TRUNC→ftruncate hardlink fix, CWE-59 patched), periodic snapshot checkpointing, scheduler-side admin request handler, integration tests (26/26 pass)
• Group 10 — Admin Dispatch + xceadmin CLI (tasks 10.1–10.3): controller-side OPCode_schedAdmin dispatch (fmt-noise + leak fix), dispatch test suite (timeout/RPC-status/error paths), xceadmin recording client functions

Aug 06 (Wed) — Group 10 (cont.) + Group 11 (simulation mode)

9 commits:

• Group 10 cont. (tasks 10.4–10.6): xceadmin scheduler dump command, CLI wiring (record_start/stop/status), mock-server E2E tests
• Group 11 — Simulation Mode (tasks 11.1–11.3): simulation-mode startup, virtual clock advancement + event loop, simulation isolation enforcement

Aug 07 (Thu) — Group 11 (cont.) + Group 12 (REPL) + Group 13 (validation)

12 commits:

• Group 11 cont. (tasks 11.4–11.6): simulation decision verification, what-if branching + output recording, normal↔sim decision equivalence tests (5/5 pass, 33/33 regression)
• Group 12 — REPL (tasks 12.1–12.4): execution control (readline→libedit GPL→BSD), breakpoints + state inspection, snapshot capture + simulation parameter commands, step/continue equivalence to batch (37/37 tests pass)
• fix(controller): stop SIGSEGV in WalCatchupEntry capnp encode (bug-1505)
• Group 13: full cross-phase HA soak regression (15 rounds sequential pass)
• Validation: spec marked implementation-complete; feature-level validation findings recorded

Aug 08 (Fri, today) — Documentation Cleanup

5 commits (documentation only, not implementation):

• docs: add scheduler recording/simulation/REPL to deployment guide
• docs(scheduler-core): sync CLAUDE.md for core/driver/picker/sim/REPL architecture
• docs(scheduler-core): commit accumulated brief/requirements/roadmap edits
• docs(scheduler-core): backfill _Verified notes for tasks 2.1–2.6
• docs(scheduler-core): commit design.md/research.md, sync design.md with as-built code

Plus a broad documentation audit (not yet committed): 33 closed .kiro/specs design.md files audited for drift against production source, with confirmed corrections across 8+ HA/Raft spec design docs. A separate stream of work (S1275–S1278) covered 28 free-standing docs → 126 audit findings, and TLS encryption claims in deployment.md were verified against libxce source (server-side TLS confirmed, do_connect() is an uncalled stub).

Bugs opened/fixed this window

Bug	Status	Summary
bug-1505	Fixed (2026-08-07, 1fd467d0)	WalCatchupEntry capnp encode SIGSEGV — Data fields in capnp schema caused null-deref; fixed by migrating to List(UInt8) (same class as bug-1504 in SnapshotData)

Spec status changes

• scheduler-core — implementation-complete (2026-08-07). All 13 task groups (1.1–13) delivered; spec.json phase → implemented. 55 commits, 112 files changed, ~42K insertions.
  • Architecture: picker plugin system (job_elect_fn contract), builtin_fcfs, extracted xce_sched_core_t, normal-mode driver, capnp replay wire format, snapshot persistence, recording lifecycle, xceadmin CLI, simulation mode (normal↔sim equivalence), interactive REPL (BSD libedit).

Stats

• 55 commits in 5 days
• 112 files changed, 42,005 insertions, 803 deletions
• 1 bug fixed (bug-1505)
• 13 task groups completed (Groups 1–13)
• 1 spec moved to implemented (scheduler-core)
• 1,087+ roundtrip tests, 26 integration tests, 37 REPL tests, 15-round HA soak all passing

Open threads heading into next session

1. scheduler-core is implementation-complete — next step is either PR review + merge to master, or starting scheduler-allocation/scheduler-preemption design.
2. Documentation audit (33 specs) is in progress — design.md corrections applied to ~8 HA/Raft specs; remaining ~24 specs need verification.
3. Broad documentation audit (S1278) still running — 28 docs with 126 findings, Tier 3 workflow targeting 32 closed spec design.md files.