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docs: complete shadow demo implementation plan

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zgw
2026-07-30 14:07:24 +08:00
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docs/superpowers/plans/2026-07-30-wcs-p0-b1-shadow-demo.md
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@@ -1,6 +1,6 @@
# WCS P0-B1 Offline SHADOW Demo Implementation Plan
> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [x]`) syntax for tracking.
**Goal:** Extend `javaTest` with a deterministic, fail-closed, in-memory P0-B1 SHADOW traffic-control kernel without changing the existing LEGACY demo or production modules.
@@ -37,7 +37,7 @@
- Produces: `ResourceKey.node(String)`, `edge(String,String)`, `conflict(String)`
- Produces: `ResourceLedger.evaluate(String, Collection<ResourceKey>): ProtectionResult`
- [ ] **Step 1: Write failing map and ledger tests**
- [x] **Step 1: Write failing map and ledger tests**
Cover checksum mismatch, unconfirmed zone, canonical undirected edge key, zone non-exclusivity, same-node conflict, opposite-edge conflict, capacity, and non-conflicting parallel candidates.
@@ -47,23 +47,23 @@ assertTrue(ledger.evaluate("V1", Arrays.asList(ResourceKey.node("N1"))).isGrante
assertFalse(ledger.evaluate("V2", Arrays.asList(ResourceKey.node("N1"))).isGranted());
```
- [ ] **Step 2: Run the focused test and verify RED**
- [x] **Step 2: Run the focused test and verify RED**
Run: `mvn -f javaTest/pom.xml -Dtest=MapAndResourceLedgerTest test`
Expected: compilation failure because the SHADOW types do not exist.
- [ ] **Step 3: Implement immutable map compilation and ledger evaluation**
- [x] **Step 3: Implement immutable map compilation and ledger evaluation**
`EffectiveTrafficMap` exposes immutable nodes, edges, capacities, safe wait/yield sites, `mapCode`, `versionId`, and checksum. `ResourceLedger` copies authoritative protection input and mutates only its private simulation state.
- [ ] **Step 4: Run focused and existing tests**
- [x] **Step 4: Run focused and existing tests**
Run: `mvn -f javaTest/pom.xml -Dtest=MapAndResourceLedgerTest test`
Run: `mvn -f javaTest/pom.xml test`
- [ ] **Step 5: Commit**
- [x] **Step 5: Commit**
```bash
git add javaTest/pom.xml javaTest/src/main/java/com/ft546/wcs/shadow/map javaTest/src/main/java/com/ft546/wcs/shadow/resource javaTest/src/test/java/com/ft546/wcs/shadow/MapAndResourceLedgerTest.java
@@ -85,15 +85,15 @@ git commit -m "feat: model shadow traffic resources"
- Produces: `TrafficSegment.transition(SegmentEvent): TrafficSegment`
- Produces: `SnapshotFreshnessPolicy.validate(previous,current,decisionTime): SnapshotHealth`
- [ ] **Step 1: Write failing state and snapshot tests**
- [x] **Step 1: Write failing state and snapshot tests**
Assert PREPARED cannot jump to EXECUTING, COMMIT uncertainty creates UNKNOWN_HARD, snapshot collections are frozen, stale snapshots are rejected, sequence rollback is rejected, and boot ID change quarantines the vehicle.
- [ ] **Step 2: Run focused test and verify RED**
- [x] **Step 2: Run focused test and verify RED**
Run: `mvn -f javaTest/pom.xml -Dtest=SegmentAndSnapshotTest test`
- [ ] **Step 3: Implement state transitions and snapshot validation**
- [x] **Step 3: Implement state transitions and snapshot validation**
Only allow:
@@ -105,13 +105,13 @@ COMMITTED/EXECUTING -> FAULT_LOCKED
All snapshot lists and maps are defensive unmodifiable copies.
- [ ] **Step 4: Run focused and full tests**
- [x] **Step 4: Run focused and full tests**
Run: `mvn -f javaTest/pom.xml -Dtest=SegmentAndSnapshotTest test`
Run: `mvn -f javaTest/pom.xml test`
- [ ] **Step 5: Commit**
- [x] **Step 5: Commit**
```bash
git add javaTest/src/main/java/com/ft546/wcs/shadow/segment javaTest/src/main/java/com/ft546/wcs/shadow/snapshot javaTest/src/test/java/com/ft546/wcs/shadow/SegmentAndSnapshotTest.java
@@ -132,7 +132,7 @@ git commit -m "feat: validate shadow segment snapshots"
- Produces: `WaitForGraph.wouldCreateCycle(waiter,holders): boolean`
- Produces: `RollingDispatchPolicy.decide(List<ShadowCandidate>, ResourceLedger, EffectiveTrafficMap): List<ShadowDecision>`
- [ ] **Step 1: Write failing deterministic decision tests**
- [x] **Step 1: Write failing deterministic decision tests**
Cover stable priority/aging/task/vehicle ordering, same-node and opposite-edge HOLD, non-conflicting parallel GRANT, committed segment non-revocation, cycle rejection, safe YIELD, and no-safe-yield HOLD.
@@ -143,21 +143,21 @@ assertEquals(DecisionType.HOLD, cycleDecision.getType());
assertEquals("WAIT_CYCLE", cycleDecision.getReasonCode());
```
- [ ] **Step 2: Run focused test and verify RED**
- [x] **Step 2: Run focused test and verify RED**
Run: `mvn -f javaTest/pom.xml -Dtest=RollingDispatchPolicyTest test`
- [ ] **Step 3: Implement deterministic rolling policy**
- [x] **Step 3: Implement deterministic rolling policy**
Sort by committed continuation, emergency, business priority descending, wait age descending, clearance cost ascending, task ID, and vehicle ID. Every non-GRANT decision includes reason code, conflicting resources, and blocking vehicles.
- [ ] **Step 4: Run focused and full tests**
- [x] **Step 4: Run focused and full tests**
Run: `mvn -f javaTest/pom.xml -Dtest=RollingDispatchPolicyTest test`
Run: `mvn -f javaTest/pom.xml test`
- [ ] **Step 5: Commit**
- [x] **Step 5: Commit**
```bash
git add javaTest/src/main/java/com/ft546/wcs/shadow/decision javaTest/src/test/java/com/ft546/wcs/shadow/RollingDispatchPolicyTest.java
@@ -175,25 +175,25 @@ git commit -m "feat: decide shadow traffic safely"
**Interfaces:**
- Produces: `FeedbackReconciler.reconcile(TrafficSegment, ExecutionFeedback): FeedbackResult`
- [ ] **Step 1: Write failing feedback tests**
- [x] **Step 1: Write failing feedback tests**
Cover A-to-B release, destination retention, duplicate snapshot idempotency, ETA expiry retention, version mismatch, skip, rollback, disconnect, ACK loss, and PLC restart.
- [ ] **Step 2: Run focused test and verify RED**
- [x] **Step 2: Run focused test and verify RED**
Run: `mvn -f javaTest/pom.xml -Dtest=FeedbackReconcilerTest test`
- [ ] **Step 3: Implement matching and release rules**
- [x] **Step 3: Implement matching and release rules**
Only matching boot ID, epoch, plan version, segment sequence, increasing snapshot sequence, and legal path suffix can release resources. Every mismatch returns quarantined `UNKNOWN_HARD` with zero released resources.
- [ ] **Step 4: Run focused and full tests**
- [x] **Step 4: Run focused and full tests**
Run: `mvn -f javaTest/pom.xml -Dtest=FeedbackReconcilerTest test`
Run: `mvn -f javaTest/pom.xml test`
- [ ] **Step 5: Commit**
- [x] **Step 5: Commit**
```bash
git add javaTest/src/main/java/com/ft546/wcs/shadow/feedback javaTest/src/test/java/com/ft546/wcs/shadow/FeedbackReconcilerTest.java
@@ -218,25 +218,25 @@ git commit -m "feat: reconcile feedback fail closed"
- Produces: `DecisionReplayService.read(InputStream): DecisionEvent`
- Produces: `DecisionReplayService.replay(DecisionEvent): List<ShadowDecision>`
- [ ] **Step 1: Write failing guard and replay tests**
- [x] **Step 1: Write failing guard and replay tests**
Assert PLC/business/reservation writes all throw, coordinator leaves LEGACY state unchanged, JSON replay reproduces type/reason/resources, and Demo output contains an explicit offline SHADOW summary.
- [ ] **Step 2: Run focused tests and verify RED**
- [x] **Step 2: Run focused tests and verify RED**
Run: `mvn -f javaTest/pom.xml -Dtest=ShadowCoordinatorReplayTest,DemoScenarioTest test`
- [ ] **Step 3: Implement coordinator, guard, event hash, and replay**
- [x] **Step 3: Implement coordinator, guard, event hash, and replay**
Use Jackson only at the replay boundary. Hash canonical event input with SHA-256. The coordinator records intended decisions but never invokes a mutable external port.
- [ ] **Step 4: Run focused tests and executable demo**
- [x] **Step 4: Run focused tests and executable demo**
Run: `mvn -f javaTest/pom.xml -Dtest=ShadowCoordinatorReplayTest,DemoScenarioTest test`
Run: `mvn -f javaTest/pom.xml exec:java`
- [ ] **Step 5: Commit**
- [x] **Step 5: Commit**
```bash
git add javaTest/pom.xml javaTest/src/main/java/com/ft546/wcs/shadow/application javaTest/src/main/java/com/ft546/wcs/shadow/replay javaTest/src/test/resources/shadow javaTest/src/main/java/com/ft546/wcs/demo/DemoApplication.java javaTest/src/test
@@ -253,19 +253,19 @@ git commit -m "feat: replay guarded shadow decisions"
- Consumes: `RollingDispatchPolicy`, `ResourceLedger`, `FeedbackReconciler`
- Produces: repeatable invariant regression output including seed, map version, and input summary.
- [ ] **Step 1: Write fixed-seed invariant tests**
- [x] **Step 1: Write fixed-seed invariant tests**
For seeds `546001` through `546010`, generate bounded 2-to-8 vehicle candidate sets and assert capacity never exceeds limits, committed wait graph remains acyclic, the same input gives the same decisions, and fault/unknown feedback never frees resources.
- [ ] **Step 2: Run property test**
- [x] **Step 2: Run property test**
Run: `mvn -f javaTest/pom.xml -Dtest=ShadowInvariantPropertyTest test`
- [ ] **Step 3: Update README**
- [x] **Step 3: Update README**
Document package boundaries, `mvn clean test`, `mvn exec:java`, covered P0-B1 scenarios, and the explicit exclusions for SQL, PLC, HIL, real SHADOW, ACTIVE, and production.
- [ ] **Step 4: Run final verification**
- [x] **Step 4: Run final verification**
Run:
@@ -276,10 +276,11 @@ mvn -f javaTest/pom.xml exec:java
Inspect Surefire XML and require `tests > 0`, `failures = 0`, `errors = 0`, and `skipped = 0`. Run `git diff --check` and confirm no changed path under `ruoyi-*`.
- [ ] **Step 5: Commit**
- [x] **Step 5: Commit**
```bash
git add javaTest/src/test/java/com/ft546/wcs/shadow/ShadowInvariantPropertyTest.java javaTest/README.md
git commit -m "test: verify shadow traffic invariants"
```