{
  "planPath": "docs/plans/2026-06-16-stillpending-phase-4c-array-support.md",
  "designPath": "docs/plans/2026-06-16-stillpending-phase-4c-array-support-design.md",
  "designCommit": "efccd8d1",
  "baseMaster": "050164b2",
  "branch": "feat/stillpending-phase-4c-array-support (merged to master 0f92e9e2, deleted)",
  "executionState": "COMPLETE — shipped + pushed to master 0f92e9e2 (ff, 23 commits). Big-bang all 5 drivers + full AbLegacy. Build clean; OpcUaServer 230, Runtime 272, AdminUI 472, Modbus 289, AbCip 292, TwinCAT 153, S7 143, AbLegacy 188 — all green. Bundle integration review caught the cross-driver isArray-gating divergence (C-1/C-2 Modbus+AbLegacy ignored isArray; I-1/I-2/I-3 the arrayLength=1 edge); final integration review = SHIP WITH MINOR FOLLOW-UPS (I-1 S7 clarity, I-2 AbCip degenerate-scalar, I-3 AbLegacy >256 author-validation, M-1 array nodes read-only) — all closed. LIVE /run PASS: a Modbus array equipment tag (HR[0..3], UInt16[4]) materialises as ValueRank=OneDimension/ArrayDimensions=[4] and a Good array value flows end-to-end from the live sim (read over the wire, Status 0x00000000, Value System.UInt16[]); the address-100 first attempt correctly surfaced the sim's Illegal-Data-Address as Bad (faithful device status). S7/AbCip/TwinCAT/AbLegacy unit-proven (fixtures down).",
  "scope": "Big-bang all 5 drivers (AskUserQuestion) + full AbLegacy array read (AskUserQuestion). 1-D read-surface only; array writes / multi-dim / array historization out of scope (array nodes forced read-only at the applier per review M-1).",
  "nativeTaskIds": {"1": 495, "2": 496, "3": 497, "4": 498, "5": 499, "6": 500, "7": 501, "8": 502, "9": 503, "10": 504, "11": 505, "12": 506},
  "tasks": [
    {"id": 1, "subject": "Sink contract — EnsureVariable array params", "classification": "high-risk", "status": "completed", "commit": "a7928202", "reviewFixCommit": "3172b7bd"},
    {"id": 2, "subject": "EquipmentTagPlan IsArray/ArrayLength + composer + applier", "classification": "high-risk", "status": "completed", "commit": "71cc4171", "reviewFixCommit": "584e9f2a"},
    {"id": 3, "subject": "DeploymentArtifact decode byte-parity", "classification": "high-risk", "status": "completed", "commit": "0a747c34", "reviewFixCommit": "eb8a8dc1"},
    {"id": 4, "subject": "AdminUI driver-agnostic isArray/arrayLength control", "classification": "standard", "status": "completed", "commit": "c2006dfb"},
    {"id": 5, "subject": "Modbus String/BitInRegister array decode + resolver", "classification": "small", "status": "completed", "commit": "8d3dc321", "reviewFixCommit": "49ac1392"},
    {"id": 6, "subject": "AbCip libplctag array read + IsArray", "classification": "standard", "status": "completed", "commit": "f4d5a5ee", "reviewFixCommit": "94e8c55b+5f7a2acd"},
    {"id": 7, "subject": "TwinCAT ADS array read + IsArray (reference impl, no fix needed)", "classification": "standard", "status": "completed", "commit": "3e742395"},
    {"id": 8, "subject": "S7 block-read array + decode loop + IsArray", "classification": "high-risk", "status": "completed", "commit": "a82c22c6", "reviewFixCommit": "3bbe39c1+d30fb77e"},
    {"id": 9, "subject": "AbLegacy PCCC multi-element array read + IsArray", "classification": "high-risk", "status": "completed", "commit": "95006939", "reviewFixCommit": "ce5d46be+0f92e9e2"},
    {"id": 10, "subject": "Docs + bookkeeping", "classification": "small", "status": "completed", "commit": "05c7e86f"},
    {"id": 11, "subject": "Full build + test + final integration review", "classification": "standard", "status": "completed", "note": "final integration review = SHIP WITH MINOR FOLLOW-UPS; 4 review fixes applied (d30fb77e/5f7a2acd/0f92e9e2/3bb2031d)"},
    {"id": 12, "subject": "Live /run acceptance + finish branch", "classification": "standard", "status": "completed", "note": "Modbus array tag live-proven (Good UInt16[4] from sim HR[0..3], over the wire); others unit-proven; root-caused the address-100 Bad as a sim Illegal-Data-Address (not a code bug)"}
  ],
  "reviewFollowUps": [
    "Foundation array test asserts in-process variable.Value only — add a wire-level Session.ReadValueAsync assertion over an array node (the live /run proved it works, but it's not unit-covered)",
    "Client.CLI read/subscribe prints an array value's type name (System.UInt16[]) not its elements — add array element formatting",
    "Array WRITES (inbound client->device), multi-dimensional arrays, array historization remain out of scope (named deferrals)",
    "Live array read for S7/AbCip/TwinCAT/AbLegacy is fixture-gated/operator-gated (unit-proven only); the 5 AbLegacy libplctag PCCC array-read assumptions need a real SLC/MicroLogix to confirm"
  ],
  "lastUpdated": "2026-06-16"
}
