Files
lmxopcua/docs/plans/2026-07-24-mqtt-sparkplug-driver.md.tasks.json
T
Joseph Doherty 88ce8df099 docs: close the plan-bookkeeping drift and state the tier truth (§8.5, §8.6, #522)
Bookkeeping: 13 .tasks.json files closed — the 8 the audit named, plus
mesh-phase4 (Task 9 landed 3a590a0c), the 4th stillpending phase file, and
historian-tcp-transport closed as OBSOLETE (it targets the retired Wonderware
sidecar; there is no Wonderware backend in the tree). Each carries a
closureNote naming the evidence rather than just a status flip.

11 archreview live gates written back from STATUS.md, which had recorded them
passed since 2026-07-13/15 without ever updating the task files: R2-01 #11,
R2-02 #15/#18, R2-05 T15, R2-06 T12, R2-07 T5/T6/T12/T14, R2-11 T22/T24.

R2-03 and R2-10 were deliberately NOT closed. STATUS.md's headline says "every
Round-2 live gate is now GREEN", but its own per-item detail says R2-03 is
"live-blocked on this data-less rig" and R2-10 verified the pipeline with
"breaker-OPEN state not forced". Both now carry an openNote recording the
actual blocker.

The point of the sweep: ~140 phantom pending tasks are gone, so the genuinely
unexecuted 19-task AdminUI follow-ups plan is now the largest open item in
docs/plans/ instead of being buried under work that shipped months ago.

Tier truth: docs/v2/driver-stability.md now states that its tier table is
aspirational — every driver runs Tier A because no factory passes a tier, so
MemoryRecycle and ScheduledRecycleScheduler have never engaged, and the config
parser validates a RecycleIntervalSeconds that does nothing. It also corrects a
staleness the audit missed: the separate-Windows-service hosting it describes
for Tier C no longer exists (Galaxy moved to the mxaccessgw sidecar in PR 7.2,
FOCAS went in-process with its managed wire client). docs/drivers/README.md
already said Tier A for both, so the two no longer contradict.

No runtime change — enabling recycle on two live drivers wants its own live
gate, not a docs-pass side effect. Keep-or-delete tracked as Gitea #522.
2026-07-27 19:54:41 -04:00

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{
"planPath": "docs/plans/2026-07-24-mqtt-sparkplug-driver.md",
"note": "Wave 2 MQTT/Sparkplug B driver. Two phases both in-scope: P1 (plain MQTT, Tasks 0-14) is a complete shippable milestone; P2 (Sparkplug B ingest, Tasks 15-26) builds on it and every P2 task chains back to Task 14. Write-through (NCMD/DCMD/plain publish) is DEFERRED (design P3). Hard rules: Task 0 (MQTTnet-5/net10 restore+build under central pinning with transitive pinning OFF) is the mandatory FIRST gate. Hand-roll Tahu proto over ONE MQTTnet-5 client (NOT SparkplugNet \u2014 its MQTTnet-4.x transitive pin collides with the repo's deliberately-OFF CentralPackageTransitivePinning). DriverType string is 'Mqtt' everywhere (grep-enforced). Enum-serialization trap: every JSON seam uses shared JsonSerializerOptions with JsonStringEnumConverter. Fixtures enforce TLS+auth, never anonymous/public-broker. Google.Protobuf (3.34.1) + Grpc.Tools (2.76.0) already pinned; MQTTnet is the one new pin. High-risk tasks: 4 (hand-rolled reconnect loop), 18/19 (alias/seq state-machine components), 21 (the full 3.6 ingest matrix).",
"tasks": [
{
"id": 0,
"subject": "Task 0 (P1): Dependency-validation spike \u2014 MQTTnet-5 pin + net10 restore/build under central pinning",
"status": "completed",
"classification": "standard",
"parallelizableWith": []
},
{
"id": 1,
"subject": "Task 1 (P1): .Contracts enums + MqttDriverOptions DTO (name-serialized)",
"status": "completed",
"classification": "small",
"parallelizableWith": [],
"blockedBy": [
0
]
},
{
"id": 2,
"subject": "Task 2 (P1): .Contracts MqttTagDefinition + MqttEquipmentTagParser (plain, strict enum)",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
1
]
},
{
"id": 3,
"subject": "Task 3 (P1): .Driver + MqttConnection connect/TLS/auth (bounded deadline)",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
1
]
},
{
"id": 4,
"subject": "Task 4 (P1): MqttConnection hand-rolled reconnect loop (backoff + resubscribe)",
"status": "completed",
"classification": "high-risk",
"parallelizableWith": [],
"blockedBy": [
3
]
},
{
"id": 5,
"subject": "Task 5 (P1): LastValueCache + IReadable (per-ref no-data)",
"status": "completed",
"classification": "small",
"parallelizableWith": [
6
],
"blockedBy": [
3
]
},
{
"id": 6,
"subject": "Task 6 (P1): ISubscribable plain topic subscribe\u2192OnDataChange + retained seed",
"status": "completed",
"classification": "standard",
"parallelizableWith": [
5
],
"blockedBy": [
2,
4
]
},
{
"id": 7,
"subject": "Task 7 (P1): MqttDriver shell \u2014 IDriver + authored-only ITagDiscovery (Once) + probe interface",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
5,
6
]
},
{
"id": 8,
"subject": "Task 8 (P1): MqttDriverProbe CONNECT handshake",
"status": "completed",
"classification": "small",
"parallelizableWith": [
10
],
"blockedBy": [
3
]
},
{
"id": 9,
"subject": "Task 9 (P1): Factory + DriverTypeNames.Mqtt + Host factory/probe registration",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
7,
8
]
},
{
"id": 10,
"subject": "Task 10 (P1): .Browser bespoke #-observation browser (passive)",
"status": "completed",
"classification": "standard",
"parallelizableWith": [
8
],
"blockedBy": [
2
]
},
{
"id": 11,
"subject": "Task 11 (P1): Register MqttDriverBrowser (bespoke-first for Mqtt)",
"status": "completed",
"classification": "trivial",
"parallelizableWith": [
12
],
"blockedBy": [
10
]
},
{
"id": 12,
"subject": "Task 12 (P1): Typed AdminUI editor + validator (plain shape)",
"status": "completed",
"classification": "standard",
"parallelizableWith": [
11
],
"blockedBy": [
2
]
},
{
"id": 13,
"subject": "Task 13 (P1): Mosquitto+JSON-publisher fixture (TLS+auth) + env-gated live suite",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
9
]
},
{
"id": 14,
"subject": "Task 14 (P1): Live /run verify on docker-dev \u2014 P1 MILESTONE COMPLETE",
"status": "completed",
"classification": "small",
"parallelizableWith": [],
"blockedBy": [
9,
11,
12,
13
]
},
{
"id": 15,
"subject": "Task 15 (P2): Vendor Tahu sparkplug_b.proto + Grpc.Tools codegen",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
14
]
},
{
"id": 16,
"subject": "Task 16 (P2): SparkplugCodec decode + golden payload vectors",
"status": "completed",
"classification": "standard",
"parallelizableWith": [
17
],
"blockedBy": [
15
]
},
{
"id": 17,
"subject": "Task 17 (P2): SparkplugTopic parse/format + SparkplugDataType.ToDriverDataType map",
"status": "completed",
"classification": "small",
"parallelizableWith": [
16
],
"blockedBy": [
15
]
},
{
"id": 18,
"subject": "Task 18 (P2): BirthCache + AliasTable \u2014 bind-by-name, rebuild-per-birth",
"status": "completed",
"classification": "high-risk",
"parallelizableWith": [
19
],
"blockedBy": [
16,
17
]
},
{
"id": 19,
"subject": "Task 19 (P2): SequenceTracker seq-gap + bdSeq death-tie",
"status": "completed",
"classification": "high-risk",
"parallelizableWith": [
18
],
"blockedBy": [
16,
17
]
},
{
"id": 20,
"subject": "Task 20 (P2): RebirthRequester NCMD encode",
"status": "completed",
"classification": "small",
"parallelizableWith": [],
"blockedBy": [
16
]
},
{
"id": 21,
"subject": "Task 21 (P2): Sparkplug ingest state machine \u2014 the 3.6 matrix",
"status": "completed",
"classification": "high-risk",
"parallelizableWith": [],
"blockedBy": [
18,
19,
20
]
},
{
"id": 22,
"subject": "Task 22 (P2): ITagDiscovery UntilStable + IRediscoverable (rediscover-on-DBIRTH)",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
21
]
},
{
"id": 23,
"subject": "Task 23 (P2): Sparkplug browser tree + AttributesAsync + scoped RequestRebirthAsync",
"status": "completed",
"classification": "standard",
"parallelizableWith": [
24
],
"blockedBy": [
20,
21
]
},
{
"id": 24,
"subject": "Task 24 (P2): AdminUI editor Sparkplug mode shape + validator",
"status": "completed",
"classification": "small",
"parallelizableWith": [
23
],
"blockedBy": [
12,
17
]
},
{
"id": 25,
"subject": "Task 25 (P2): C# edge-node simulator fixture + 3.6 live matrix",
"status": "completed",
"classification": "standard",
"parallelizableWith": [],
"blockedBy": [
21,
22,
23
]
},
{
"id": 26,
"subject": "Task 26 (P2): Live /run verify Sparkplug \u2014 P2 COMPLETE",
"status": "completed",
"classification": "small",
"parallelizableWith": [],
"blockedBy": [
23,
24,
25
]
}
],
"lastUpdated": "2026-07-27",
"closureNote": "All 27 tasks shipped, both phases live-gated. Marked complete 2026-07-27 (deferment.md \u00a78.5)."
}