Open_Ultra_SAST/.kiro/specs/pre-push-safety-net/implementation-group-6.md

Group 6 implementation and verification

The maintainer authorized 6.1–6.4 together on 2026-09-13. A fresh implementer dispatch failed with agent thread limit reached; the explicit kiro-impl manual fallback applies. Reviews below are main-context adversarial reviews, not independent reviewer evidence. The design amendment makes measured preparation/discovery costs explicit. Rollout gates and the empty default capability registry are unchanged.

Task 6.1 brief

Requirements 4.2, 4.3, 4.4 and 7.3; design: Cache and Engine Boundary. Backend-owned identities bind readable source paths/bytes, declarations, exclusions, frontend/engine versions, overlay implementation and options. Complete graphs require a named source census, methods, calls and the dataflow overlay. Loading checks identity and streamed graph digest, then issues a disposable copy through the existing CpgResult driver contract. Old structural manifests without source paths cannot qualify. Sharded or partial graphs cannot qualify. Query locations normalize to repository-relative paths.

Status Report

• STATUS: READY_FOR_REVIEW
• TASK: 6.1
• RED_PHASE_OUTPUT: /tmp/group6-1-red.log and /tmp/group6-1-flag-off.log: four failures before implementation/with the temporary switch OFF. ON passed; switch removed and five final tests passed.
• TESTS_RUN: 105 focused tests passed; full suite 1246 passed, 9 skipped (105.31s), followed by the final additional driver integration test and focused rerun. Ruff and mypy passed.
• EVIDENCE: source-mounted nonroot Docker Joern 4.0.625, network disabled, 3 GiB limit: read 45 JavaScript bytes, census 1 file/4 methods/3 calls, sealed graph loaded through a disposable lease, original digest unchanged after query and cleanup. This is a correctness control, not a latency benchmark.
• CONCERNS: persistent publication and runner selection belong to 6.2–6.4; this task provides the validated backend lease contract. Main-context review fallback.

Review Verdict

• VERDICT: APPROVED
• TASK: 6.1
• MECHANICAL_RESULTS: focused tests, full regression suite, ruff, mypy and diff whitespace checks passed; no introduced placeholders or secrets.
• FINDINGS: review repaired unbounded full-graph buffering to streamed hashing/copy; unreadable source walks fail explicitly; single PHP graph census passes through unchanged while sharded graphs cannot seal. Existing driver accepts and releases the leased CpgResult.
• SUMMARY: Backend identity and isolated leases satisfy task 6.1 within the approved boundary.

Verification Result

• STATUS: VERIFIED
• CLAIM_TYPE: TASK
• CLAIM: Task 6.1 identity and lease behavior, not persistent runner reuse or rollout readiness.
• EVIDENCE: tests/test_graph_reuse.py, 105 focused passing tests, full suite and real Joern control above; measurement JSON retained in benchmarks/measurements/2026-09-13-graph-lease-control.json.
• GAPS: Warm push feasibility and independent capability eligibility remain unproven.