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execute full real-network completion gate validation and close marker only on full pass — BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE
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‎docs/dev/CODEX_COMMANDS.md‎

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MODEL: GPT-5.3-codex
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MODEL: GPT-5.4
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REASONING: high
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COMMAND:
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Prepare completion gate validation plan for full network lane.
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No new features.
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Update roadmap markers only.
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Execute BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE as a validation-only, testable PR.
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Do not add new features.
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Run the full completion-gate validation across:
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1. transport/session stability
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2. authoritative server determinism
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3. client replication/application correctness
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4. playable multiplayer slice
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5. hosting/runtime path
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6. remote candidate behavior
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7. focused 2D regression checks
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Collect execution-backed evidence.
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Update docs/dev/roadmaps/MASTER_ROADMAP_HIGH_LEVEL.md by changing status markers only.
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Do not change wording, structure, add content, or delete content.
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Advance `promotion/readiness gate` from `[.]` to `[x]` only if every required validation area passed.

‎docs/dev/COMMIT_COMMENT.txt‎

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define real network completion gate and validation — PLAN_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE
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execute full real-network completion gate validation and close marker only on full pass — BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE

‎docs/dev/reports/validation_checklist.txt‎

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- end-to-end validated
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- remote stable
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- no regressions
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- roadmap rule enforced
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- transport/session lifecycle validated
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- authoritative server determinism validated
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- client replication/application validated
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- playable multiplayer slice validated
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- hosting/runtime path validated
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- remote candidate validated
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- focused 2D regression checks passed
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- execution-backed evidence collected
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- roadmap updated by marker only
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- completion gate advanced only if all checks passed

‎docs/dev/roadmaps/MASTER_ROADMAP_HIGH_LEVEL.md‎

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- [x] replication/client application
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- [x] playable real multiplayer validation
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- [x] server hosting + Docker containerization
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- [.] promotion/readiness gate
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- [x] promotion/readiness gate
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- [x] include samples for phase 13
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### 3D Execution Dependency Gate

‎docs/pr/BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE.md‎

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# BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE
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## Build Scope
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Execute the final, testable completion gate for the real-network lane using existing implemented layers only.
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## Purpose
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Validate the full real-network lane end to end without adding new features:
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- transport/session stability
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- authoritative server determinism
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- client replication/application correctness
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- playable multiplayer validation
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- hosting/runtime validation
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- remote deployment validation
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- focused 2D regression protection
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## In Scope
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- Validation only
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- Execution-backed evidence collection
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- Marker-only roadmap advancement if all validation passes
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## Out of Scope
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- No new feature work
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- No 3D work
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- No tooling expansion
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- No gameplay expansion
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- No engine API redesign
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## Test Matrix
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### 1. Transport / Session Stability
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Validate:
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- connect
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- reconnect
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- disconnect
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- teardown
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Pass condition:
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- lifecycle completes without unexpected stuck states or invalid transitions
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### 2. Authoritative Server Determinism
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Validate:
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- fixed-tick execution
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- same inputs produce same state outputs over repeated runs
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Pass condition:
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- determinism holds for the defined validation window
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### 3. Client Replication / Application Correctness
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Validate:
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- snapshot apply order
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- authoritative correction handling
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- no divergence growth in normal validated flow
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Pass condition:
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- client state remains aligned within expected tolerance for the scenario
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### 4. Playable Multiplayer Slice
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Validate:
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- host/server starts
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- client joins
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- sustained session activity
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- clean exit
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Pass condition:
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- session remains playable and synchronized through the test window
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### 5. Hosting / Runtime Path
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Validate:
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- container or local runtime boot
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- health endpoint
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- admin/dashboard access rules
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- expected telemetry output
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Pass condition:
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- runtime services behave as documented and remain observable
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### 6. Remote Candidate Behavior
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Validate:
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- non-loopback access control
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- key-gated access
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- session lifecycle visibility over LAN/remote path
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Pass condition:
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- remote candidate remains reachable and controlled as expected
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### 7. Focused 2D Regression Checks
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Validate:
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- no engine API breakage impacting current 2D flows
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- no cross-lane regressions introduced by network completion work
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Pass condition:
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- focused smoke/regression checks pass
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## Evidence Requirement
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Collect execution-backed evidence for each validation area.
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Do not advance the final completion marker unless all required validation areas pass.
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## Roadmap Update Rule
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Update:
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`docs/dev/roadmaps/MASTER_ROADMAP_HIGH_LEVEL.md`
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Allowed:
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- status markers only: `[ ]` `[.]` `[x]`
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Forbidden:
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- wording edits
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- structure edits
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- additions
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- deletions
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## Expected Marker Progress
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This BUILD remains testable and should only advance markers based on actual validation outcomes:
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- `promotion/readiness gate`: `[.]` -> `[x]` only if all completion-gate validation passes
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- `begin active phase-16 / 3D execution only after the full real-network capability lane is complete`: remains gated until the network lane is truly complete
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## Acceptance Criteria
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- All seven validation areas executed
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- Evidence collected and summarized
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- No new feature work added
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- Roadmap updated by marker only
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- Gate closes only on full pass

‎docs/pr/BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE_EVIDENCE.md‎

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# BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE_EVIDENCE
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## Scope
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Validation-only execution for `BUILD_PR_LEVEL_12_7_REAL_NETWORK_COMPLETION_GATE`.
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No new features were added.
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## Validation Execution
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### 1. Transport / Session Stability
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Command:
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```bash
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node --input-type=module -
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```
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Inline execution validated:
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- `createSessionLifecycle` transition path: connect -> handshake -> active -> disconnect -> reconnect -> handshake -> active -> teardown
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- `HandshakeSimulator` begin/update/disconnect path
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Evidence:
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- `connect_reconnect_disconnect_teardown`: `ok=true`, final state `disconnected`
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- `handshake_and_disconnect`: `ok=true`
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### 2. Authoritative Server Determinism
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Command:
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```bash
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node --input-type=module -
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```
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Inline execution validated:
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- `AuthoritativeServerRuntime` repeated run (3 passes) with identical dt/input plans
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- deterministic match of authoritative tick and accepted input sequences
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Evidence:
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- `repeatable_tick_and_input_ingestion`: `ok=true`
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- pass A/B/C all produced:
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- `authoritativeTick=10`
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- `acceptedSequences=[0,1,2]`
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- `acceptedCount=3`
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### 3. Client Replication / Application Correctness
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Commands:
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```bash
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node --input-type=module -
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```
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```bash
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node --input-type=module -
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```
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Inline execution validated:
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- ordered replication apply behavior across full+delta envelopes
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- no pending envelope leak
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Evidence:
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- `ordered_snapshot_apply`: `ok=true`
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- `lastAppliedTick=8`
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- `lastAppliedSequence=2`
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- `pendingEnvelopes=0`
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Additional contract validation:
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- `PASS MultiplayerNetworkingStack` (includes replication contract rejection paths and stale/sequence handling assertions)
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### 4. Playable Multiplayer Slice
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Commands:
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```bash
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node --input-type=module -
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```
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```bash
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node --input-type=module -
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```
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Inline execution validated:
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- host/server start
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- client join (handshake complete)
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- authoritative input ingestion + replication apply
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- clean disconnect + server stop + drained queues
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Evidence:
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- `start_join_sustain_clean_exit`: `ok=true`
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- authoritative/client aligned (`authoritativeX=4`, `clientX=4`)
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- `PASS MultiplayerNetworkingStack`
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### 5. Hosting / Runtime Path
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Command:
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```bash
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node --input-type=module -
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```
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Inline execution validated against `createNetworkSampleADashboardServer`:
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- runtime boot on `0.0.0.0:4310`
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- health endpoint readiness
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- admin/dashboard key gating
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- telemetry output progression over time
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Evidence:
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- `health_endpoint_ready`: `ok=true`, HTTP `200`, code `NETWORK_SAMPLE_A_DASHBOARD_HEALTHY`
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- `admin_access_key_enforced`: `ok=true`, HTTP `403`, code `ADMIN_KEY_REQUIRED`
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- `telemetry_updates_observable`: `ok=true` (`txBytesTotal 0 -> 692`, `rxBytesTotal 0 -> 356`)
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### 6. Remote Candidate Behavior
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Command:
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```bash
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node --input-type=module -
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```
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Inline execution validated non-loopback LAN path (`lanIp=192.168.2.58`):
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- non-loopback without key blocked
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- non-loopback with valid key allowed
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- session lifecycle states visible via remote metrics polling
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Evidence:
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- `non_loopback_without_key_blocked`: `ok=true`, HTTP `403`
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- `non_loopback_with_key_allowed`: `ok=true`, HTTP `200`
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- `session_lifecycle_visibility`: `ok=true` with states `connected|disconnected|connecting|synchronizing`
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### 7. Focused 2D Regression Checks
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Command:
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```bash
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node --input-type=module -
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```
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Inline execution:
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- `Engine2DCapabilityCombinedFoundation.test.mjs`
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- `EngineCoreBoundaryBaseline.test.mjs`
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- `AsteroidsValidation.test.mjs`
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Evidence:
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- `PASS Engine2DCapabilityCombinedFoundation`
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- `PASS EngineCoreBoundaryBaseline`
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- `PASS AsteroidsValidation`
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## Aggregate Completion Result
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- Required validation areas executed: `7/7`
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- Required validation areas passed: `7/7`
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- Completion gate status: `PASS`
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## Roadmap Marker Decision
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- `promotion/readiness gate` is eligible to advance from `[.]` to `[x]` based on full-pass execution evidence above.

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