git.stella-ops.org/docs/features/checked/tools/fixture-harvester-tool.md

Fixture Harvester Tool (Deterministic Fixture Rewriter)

Module

Tools

Status

VERIFIED

Description

CLI tool for deterministic test fixture management. Rewrites Concelier OSV/GHSA/NVD fixtures with SHA-256-based deterministic GUIDs and fixed timestamps, ensuring reproducible test data across environments.

Implementation Details

• Fixture Updater App: src/Tools/FixtureUpdater/FixtureUpdaterApp.cs (96 lines) -- CLI entry point using System.CommandLine. Parses --repo-root, --osv-fixtures, --ghsa-fixtures, --nvd-fixtures, --fixed-time options. Resolves repository root and fixture paths, constructs FixtureUpdaterOptions, dispatches to runner.
• Fixture Updater Runner: src/Tools/FixtureUpdater/FixtureUpdaterRunner.cs (533 lines) -- core execution engine: processes OSV raw fixtures (JSON arrays of OsvVulnerabilityDto), generates deterministic snapshot fixtures for npm/PyPI ecosystems, processes GHSA raw fixtures (GhsaRecordDto), generates credit parity regression fixtures across GHSA/OSV/NVD sources. Uses FixtureDeterminism class for SHA-256-based deterministic GUID generation.
• Program.cs: src/Tools/FixtureUpdater/Program.cs (3 lines) -- delegates to FixtureUpdaterApp.RunAsync(args).

E2E Test Plan

• Run the fixture updater tool twice with the same inputs and verify outputs are bit-for-bit identical (determinism check)
• Verify error reporting includes context about which fixture source caused the failure

Verification

• Verified: 2026-02-10
• Method: Tier 1 code review + Tier 2d test verification
• Build: Passes (0 errors, 0 warnings)
• Tests: 2 tests pass (determinism verification, error reporting with context)
• Caveat: Original feature description overstated capabilities. The tool does NOT implement harvest/validate/regen sub-commands, YAML manifests with schema versioning, tiered fixtures (Synthetic/Spec Examples/Real Samples/Regression), or configurable refresh policies. The actual tool is a deterministic OSV/GHSA/NVD fixture rewriter using SHA-256 hashing and fixed timestamps. Feature title and description updated to reflect actual implementation.

Recheck (Run-002)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (src/Tools/__Tests/FixtureUpdater.Tests: 2/2).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-002/tier2-integration-check.json
• Outcome: Deterministic fixture rewrite and contextual error reporting behavior remain stable.

Recheck (Run-003)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (src/Tools/__Tests/FixtureUpdater.Tests: 2/2).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-003/tier2-integration-check.json
• Outcome: Deterministic fixture rewrite and contextual error reporting behavior remain stable.

Recheck (Run-004)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (FixtureUpdater 2/2).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-004/tier2-integration-check.json
• Outcome: Checked Tools behavior remains healthy in follow-up replay.

Recheck (Run-005)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (FixtureUpdater 2/2).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-005/tier2-integration-check.json
• Outcome: Checked Tools behavior remains healthy in continued replay.

Recheck (Run-006)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (FixtureUpdater 2/2).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-006/tier2-integration-check.json
• Outcome: Checked Tools behavior remains healthy in continued replay.

Recheck (Run-007)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (FixtureUpdater 2/2).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-007/tier2-integration-check.json
• Outcome: Checked Tools behavior remains healthy in continued replay.

Recheck (Run-008)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (FixtureUpdater 2/2).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-008/tier2-integration-check.json
• Outcome: Checked Tools behavior remains healthy in continued replay.

Recheck (Run-009)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (WorkflowGenerator 76/76, FixtureUpdater 2/2, GoldenPairs 9/9; total 87/87).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-009/tier2-integration-check.json
• Outcome: Checked tools behavior remains healthy in continued replay.

Recheck (Run-010)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (WorkflowGenerator 76/76, FixtureUpdater 2/2, GoldenPairs 9/9; total 87/87).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-010/tier2-integration-check.json
• Outcome: Checked tools behavior remains healthy in continued replay.

Recheck (Run-011)

• Verified: 2026-02-10
• Method: Tier 2d deterministic integration replay.
• Tests: PASS (WorkflowGenerator 76/76, FixtureUpdater 2/2, GoldenPairs 9/9; total 87/87).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-011/tier2-integration-check.json
• Outcome: Checked tools behavior remains healthy in continued replay.

Recheck (Run-012)

• Verified: 2026-02-10
• Method: Tier 2d deterministic tools suite replay.
• Tests: PASS (WorkflowGenerator 76/76, FixtureUpdater 2/2, GoldenPairs 9/9; total 87/87).
• Tier 2 Evidence: docs/qa/feature-checks/runs/tools/fixture-harvester-tool/run-012/tier2-integration-check.json
• Outcome: Checked tools behavior remains healthy in continued replay.