hakorune/docs/development/current/main/PHASE_64_SUMMARY.md

Phase 64 Summary: Ownership P3 Production Integration (dev-only)

Goal

Connect OwnershipPlan analysis to production P3(if-sum) route for dev-only validation.

Changes

1. ast_analyzer.rs: Added analyze_loop() helper

• Purpose: Analyze a single loop (condition + body) with parent context
• Signature: analyze_loop(condition, body, parent_defined) -> Result<OwnershipPlan>
• Usage: Called from P3 production route in pattern3_with_if_phi.rs
• Features:
  • Creates temporary function scope for parent-defined variables
  • Analyzes loop scope with condition/body AST
  • Returns OwnershipPlan for loop scope only

2. pattern3_with_if_phi.rs: Added dev-only OwnershipPlan call + consistency checks

• Location: Inside lower_pattern3_if_sum() method, after ConditionEnv building
• Feature gate: #[cfg(feature = "normalized_dev")]
• Workflow:
  1. Collect parent-defined variables from variable_map
  2. Call analyze_loop() to produce OwnershipPlan
  3. Run check_ownership_plan_consistency() checks
  4. Continue with existing lowering (analysis-only, no behavior change)

3. Consistency checks (check_ownership_plan_consistency())

Check 1: Multi-hop relay rejection (Fail-Fast)

• What: relay_path.len() > 1 → Err
• Why: Multi-hop relay is out of scope for Phase 64
• Action: Return error immediately (Fail-Fast principle)

Check 2: Carrier set consistency (warn-only)

• What: Compare plan.owned_vars (written) vs carrier_info.carriers
• Why: Verify OwnershipPlan matches existing CarrierInfo
• Action: Warn if mismatch (order SSOT deferred to Phase 65+)

Check 3: Condition captures consistency (warn-only)

• What: Verify plan.condition_captures ⊆ condition_bindings
• Why: Ensure OwnershipPlan condition captures are tracked
• Action: Warn if extra captures found

4. Regression tests (normalized_joinir_min.rs)

Test 1: test_phase64_p3_ownership_prod_integration()

• Purpose: Verify analyze_loop() works for simple P3 loops
• Pattern: loop(i < 10) { local sum=0; sum=sum+i; i=i+1; }
• Checks:
  • Owned vars: sum (is_written=true), i (is_written=true, is_condition_only=true)
  • No relay writes (all loop-local)
  • Single-hop relay constraint verified

Test 2: test_phase64_p3_multihop_relay_rejection()

• Purpose: Verify multi-hop relay detection
• Pattern: Nested loops with relay write to function-scoped variable
• Checks:
  • Detects multi-hop relay (relay_path.len() > 1)
  • Documents that rejection happens in consistency check (not analyze_loop)

Constraints

• Dev-only: #[cfg(feature = "normalized_dev")] throughout
• Analysis-only: No behavior change to lowering
• Fail-Fast: Multi-hop relay (relay_path.len() > 1)
• Warn-only: Carrier set mismatch (order SSOT deferred)

Build and Test

# Build with normalized_dev feature
cargo build --release --features normalized_dev

# Run Phase 64 tests
cargo test --features normalized_dev --test normalized_joinir_min phase64

# Run ownership module tests
cargo test --features normalized_dev --lib ownership

Expected: All tests pass, no regressions.

Next Steps

Phase 65+: Future Enhancements

1. Multi-hop relay support: Remove relay_path.len() > 1 limitation
2. Carrier order SSOT: Use OwnershipPlan to determine carrier order (upgrade warn to error)
3. Owner-based init: Replace legacy FromHost with owner-based initialization
4. Full AST coverage: Extend analyze_loop() to handle more complex patterns

Related Documents

• Phase 62: Ownership P3 Route Design
• Phase 63: AST Ownership Analyzer
• JoinIR Architecture Overview