Phase 1028 Plan 01 — Wave 0 measurement infrastructure

.github/workflows/benchmark.yml

@@ -46,6 +46,16 @@ jobs:
         run: |
           xvfb-run octave --eval "addpath(pwd); install(); addpath('scripts'); run_ci_benchmark();"
 
+      # Phase 1028 D-07: upload the raw benchmark-results.json so the
+      # 1000-tag harness baseline can be captured without scraping logs.
+      - name: Upload benchmark results artifact
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: bench-tag-pipeline-1k-results
+          path: benchmark-results.json
+          retention-days: 30
+
       - name: Fix git ownership
         run: git config --global --add safe.directory /__w/FastSense/FastSense
 

.github/workflows/tests.yml

@@ -266,6 +266,13 @@ jobs:
             echo "_Results file not produced (test job likely crashed before completion)._" >> "$GITHUB_STEP_SUMMARY"
           fi
 
+      # Phase 1028 D-06: smoke-run the 1000-tag harness on every push so
+      # syntax/regressions in the harness itself surface within the test job
+      # (the gated full bench runs separately in benchmark.yml).
+      - name: Phase 1028 harness smoke
+        run: |
+          xvfb-run octave --eval "addpath(pwd); install(); bench_tag_pipeline_1k('--smoke');"
+
   # Smoke test: ensure Octave MEX sources still compile on macOS.
   # Authoritative prebuilt binaries for releases come from refresh-mex-binaries.yml,
   # which commits platform-specific binaries into libs/.../octave-<platform>/.

.planning/ROADMAP.md

@@ -115,7 +115,7 @@ Full details: [milestones/v3.0-ROADMAP.md](milestones/v3.0-ROADMAP.md)
 | 1026. Dashboard time slider preview | pending | 0/? | Not started | — |
 | 1027. Companion detachable log window | pending | 5/5 | Complete    | 2026-05-08 |
 | 1027.1. Independent events/live log detach | pending | 8/8 | Complete    | 2026-05-08 |
-| 1028. Tag update perf — MEX + SIMD | pending | 0/? | Not started | — |
+| 1028. Tag update perf — MEX + SIMD | pending | 3/6 (+ 02b/02d insertions) | In Progress | Wave-1.5 cache lands; Plans 03/04/05 ahead |
 
 ## Phase Details (Pending Milestone)
 
@@ -183,11 +183,23 @@ Plans:
 
 ### Phase 1028: Tag update perf — MEX + SIMD
 
-**Goal:** Profile and accelerate the tag update path (SensorTag/StateTag/MonitorTag/CompositeTag streaming + recompute). Identify hot spots and replace with C MEX kernels using SIMD (AVX2 / NEON) where it pays off, consistent with existing FastSense MEX patterns.
+**Goal:** Profile and accelerate the tag update path at the 1000-tag × N-source × 1-session workload anchor (CONTEXT.md D-01). Land MEX kernels (K1 delimited_parse, K2 monitor_fsm, K3 composite_merge, K4 aggregate_matrix) behind transparent .m fallback dispatch (D-09), and conditionally land Stage 2 architectural seams (A1+A2 listener coalescing) gated on Stage-1 measurement (D-05). All 5 existing benchmark gates remain green throughout (D-08); no public API changes (D-10); DerivedTag.UserFn untouched (D-11); .mat write cadence unchanged (D-12).
 
 **Promoted from:** Backlog 999.5 (2026-05-08)
-**Requirements:** TBD
-**Plans:** 0 plans
+**Decisions:** D-01..D-12 from .planning/phases/1028-tag-update-perf-mex-simd/1028-CONTEXT.md (no formal REQ-IDs for v3.x)
+**Plans:** 2/6 plans executed
+
+Plans:
+- [x] 1028-01-PLAN.md — Wave 0: 1000-tag harness + parity scaffolds + regression suite + CI wiring + baseline measurement
+- [x] 1028-02-PLAN.md — Wave 1: K1 delimited_parse_mex + .m fallback dispatch
+- [x] 1028-02b — Wave 1.5 (insertion, no formal PLAN.md): NoIO measurement-gap fix via DI seam (`writeFn_` private + Hidden `setWriteFnForTesting_`); clean tBreakdown shows 65% of WithIO tick is .mat I/O
+- [x] 1028-02d — Wave 1.5 (insertion, no formal PLAN.md): in-memory prior-state cache eliminating per-tick `load()` inside `writeTagMat_('append',...)`; D-09 byte-equal parity (TestPriorStateCacheParity); D-10 / D-12 preserved
+- [ ] 1028-03-PLAN.md — Wave 2: K2 monitor_fsm_mex (fused hysteresis+debounce+findRuns) + .m fallback
+- [ ] 1028-04-PLAN.md — Wave 3: K3 composite_merge_mex + K4 aggregate_matrix_mex (6 structural modes) + fallbacks
+- [ ] 1028-05-PLAN.md — Wave 4 (CONDITIONAL): Stage 2 architectural — A1 listener coalescing + A2 batch invalidate, gated on Stage-1 measurement
+- [ ] 1028-06-PLAN.md — Wave 5: Phase wrap — finalize VERIFICATION.md, update ROADMAP.md + STATE.md
+
+> Plans 02-06 are serialized: each Wave-N plan extends the SensorThreshold MEX block in `libs/FastSense/build_mex.m`, appends measurements to `bench_tag_pipeline_1k.m`, and writes a new subsection to `1028-VERIFICATION.md`. The serial chain prevents shared-file conflicts and naturally flows each plan's `tickMin` into the next plan's Δ-vs-previous table.
 
 ## Backlog
 

.planning/STATE.md

@@ -1,26 +1,26 @@
 ---
 gsd_state_version: 1.0
-milestone: v3.0
-milestone_name: FastSense Companion
-status: shipped
-last_updated: "2026-05-08T23:30:00.000Z"
-last_activity: 2026-05-08 -- Quick fix 260508-od4: roll back ny6 switchPage refresh sweep (didn't fix stuck-widget symptom, added per-tab cost) + guard HoverCrosshair.onFigureMove_ against invalid-object errors after panel teardown (OD4-01/02)
+milestone: v1.0
+milestone_name: milestone
+status: executing
+last_updated: "2026-05-08T16:30:00.000Z"
+last_activity: 2026-05-08
 progress:
   total_phases: 6
-  completed_phases: 2
-  total_plans: 13
-  completed_plans: 13
+  completed_phases: 0
+  total_plans: 6
+  completed_plans: 3
 ---
 
 # State
 
 ## Current Position
 
-Phase: 1028
-Plan: Not started
+Phase: 1028 (tag-update-perf-mex-simd) — EXECUTING
+Plan: 3 of 6 (Plans 01 + 02 + 02b + 02d complete; 02b/02d are mid-phase Wave-1.5 insertions for measurement gap and .mat read-side cache)
 Milestone: v3.0 FastSense Companion — SHIPPED 2026-04-30
-Status: Awaiting next milestone (run `/gsd:new-milestone` to scope v3.x or v4.0)
-Last activity: 2026-05-08 -- Quick fix 260508-od4 (936feac): roll back ny6 + guard HoverCrosshair.onFigureMove_ against invalid-object errors after panel teardown
+Status: Ready to execute Plan 03 — see VERIFICATION.md for strategic implication on K2/K3/K4/K5 scoping (cache landed; Plan 05 H8/H9 trigger reassessment pending CI data)
+Last activity: 2026-05-08 — Plan 02d in-memory prior-state cache shipped (skips per-tick load() in writeTagMat_('append',...))
 
 ### Quick Tasks Completed