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feat(arrays): advertise AbCip/AbLegacy/TwinCAT array writes in DriverArrayWriteSupport

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The Wave-2 lanes gave AbCip, AbLegacy and TwinCAT real whole-array write
encoders (review 07 U10/U9), but the capability table still listed all three
as scalar-only, so every array node materialised read-only and a client write
was BadNotWritable before it reached the driver.

Rows added, each listing only what WriteAsync encodes end to end:
- AbCip: SInt/USInt/Int/UInt/DInt/UDInt/Real/Dt/LInt/ULInt/LReal, declared
  length, not a safetyTag. BOOL/STRING/Structure arrays stay read-only.
- AbLegacy: Int/AnalogInt on N/B/A, Long on L, Float on F (file-width match),
  plain <file><n>:<word> address, <= 256 elements; not /bit, .sub, indirect,
  S:/I:/O:, nor native PLC-5.
- TwinCAT: every codec element type, declared length; not a BOOL bit-in-word
  path.
Elements convert in all three encoders, so the rows never key on an exact
node DataType (ScadaBridge int[] -> Int16 stays writable); they leave out
only node types whose elements never convert (DateTime/String over numeric,
Boolean on AbLegacy, STRING under DateTime on TwinCAT: culture-dependent).

Tests: driver-level parity for each driver (every element type x node type
plus shape cases, against the real write path), the AbLegacy parity tests
un-skipped, Core.Abstractions row tests, a composer test (three drivers
writable, refused shapes read-only), and the existing AbCip negative cases
moved to a BOOL array. Docs: Uns.md table, per-driver docs, data-plane rules.

Refs #737 #738 #739

Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
This commit is contained in:
Joseph Doherty
2026-10-22 16:17:48 -04:00
parent cb9a48ee96
commit 44ea6595e5
12 changed files with 864 additions and 46 deletions
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.claude/rules/data-plane-auth.md
+3 -1
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@@ -151,7 +151,9 @@ Two things to know before relying on any of this:
array node is writable only when the driver can write the array (`DriverArrayWriteSupport`: Modbus bounded
by `maxRegistersPerWrite`/coil cap, S7 non-Bool/non-wide types, OpcUaClient, Galaxy signed types **with a
declared `arrayLength`** — an undeclared length stays read-only because a short whole-array write would
resize the Galaxy attribute); `arrayLength >= 1` is required, and the node's `Writable && (!IsArray ||
resize the Galaxy attribute; AbCip atomic non-BOOL types, AbLegacy Int/Long/Float on the matching data file
(no `/bit`/`.sub`/indirect/`S:`/`I:`/`O:`, not native PLC-5, ≤ 256), TwinCAT every codec type but a BOOL
bit-in-word path — #737/#738/#739; those three CONVERT elements, so they never key on an exact node type); `arrayLength >= 1` is required, and the node's `Writable && (!IsArray ||
ArrayWritable)` is projected onto the raw node and every UNS mirror.
- **Anonymous is a normal grantable principal**, not a bypass. `OpcUa:AllowAnonymous` (default `true`,
preserving today's behaviour) controls *admission*; when admitted the session authenticates as the