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ShyftR Phase 7 P7-3 closeoff

Date: 2026-05-15 Repo: /Users/stefan/ShyftR Phase: Phase 7 — privacy, policy, and safety hardening Tranche: P7-3 — contradiction and poisoning fixtures Status: committed, pushed, verified green Predecessor closeoff: /Users/stefan/ShyftR/2026-05-15-shyftr-phase-7-p7-2-closeoff.md Planning artifacts:

  • /Users/stefan/ShyftR/2026-05-15-shyftr-phase-7-tranche-p7-0-plan.md
  • /Users/stefan/ShyftR/2026-05-15-shyftr-phase-7-tranche-p7-3-plan.md

Final verdict

P7-3 is complete on the intended local implementation surface.

This tranche landed the smallest fixture-safe contradiction and poisoning slice after P7-2 by activating a conservative policy_conflict Challenger path for prompt-injection-like spark text while preserving the existing harmful-outcome contradiction path. The result is a deterministic, local-first safety fixture surface that classifies risky policy-violating instructions without mutating lifecycle state or widening durable-write authority.

What landed

  1. Prompt-injection-like spark classification

    • Challenger spark evidence now distinguishes a small set of prompt-injection or policy-violating markers from generic ambiguous counter-evidence.
    • matching spark text is classified as policy direction during counter-evidence collection.

  2. Policy-conflict finding emission

    • policy-directed evidence now produces a policy_conflict finding in dry-run Challenger reports.
    • the finding includes supporting_data.policy_signal == "prompt_injection_like".

  3. Existing contradiction behavior preserved

    • harmful outcome flags still produce direct_contradiction findings.
    • no lifecycle ledgers are mutated by the new behavior.
    • no new durable-write authority path was introduced.

  4. Canonical tranche artifact

    • a new P7-3 plan artifact records the smallest chosen slice, touchpoints, focused verification commands, and stop boundary.

New and updated tests

New focused Phase 7 test file:

  • tests/test_phase7_contradiction_safety.py

Assertions covered there:

  • prompt-injection-like spark text emits policy_conflict
  • harmful outcome flags still emit direct_contradiction

Verification

RED/GREEN focused test cycle:

  • cd /Users/stefan/ShyftR && PYTHONPATH=.:src pytest -q tests/test_phase7_contradiction_safety.py
  • initial RED result: the new prompt-injection fixture failed because the Challenger did not emit policy_conflict
  • final GREEN result: 2 passed

Focused tranche regression:

  • cd /Users/stefan/ShyftR && PYTHONPATH=.:src pytest -q tests/test_phase7_contradiction_safety.py tests/test_memory_evolution_supersession.py tests/test_sweep.py tests/test_memory_provider.py
  • result: 44 passed

Vocabulary guard:

  • cd /Users/stefan/ShyftR && PYTHONPATH=.:src pytest -q tests/test_memory_vocabulary_guard.py
  • initial result: one plan-doc vocabulary failure from legacy implementation wording in the P7-3 plan
  • final result after plan normalization: 4 passed

Repo-wide verification:

  • cd /Users/stefan/ShyftR && PYTHONPATH=.:src pytest -q
  • result: 980 passed, 31 warnings
  • cd /Users/stefan/ShyftR && PYTHONPATH=.:src python -m compileall -q src scripts examples → pass
  • cd /Users/stefan/ShyftR && python scripts/terminology_inventory.py --fail-on-public-stale → pass
  • cd /Users/stefan/ShyftR && python scripts/terminology_inventory.py --fail-on-capitalized-prose → pass
  • cd /Users/stefan/ShyftR && python scripts/public_readiness_check.py → PASS
  • cd /Users/stefan/ShyftR && git diff --check → pass

Implementation touchpoints

Core code updated:

  • src/shyftr/audit/challenger.py

Tests added:

  • tests/test_phase7_contradiction_safety.py

Planning/status docs added:

  • 2026-05-15-shyftr-phase-7-tranche-p7-3-plan.md
  • 2026-05-15-shyftr-phase-7-p7-3-closeoff.md

Exact behavioral change

Before P7-3:

  • prompt-injection-like spark text linked to an approved-memory record was treated as generic ambiguous evidence
  • Challenger had a reserved policy_conflict classification but no active behavior behind it

After P7-3:

  • prompt-injection-like spark text is recognized as policy-directed evidence
  • Challenger emits a deterministic policy_conflict finding with a stable policy-signal marker
  • the flow remains read-only unless spark proposal writing is explicitly enabled elsewhere

Scope boundary reached

This tranche intentionally stops at the smallest contradiction/poisoning fixture surface:

  • prompt-injection-like spark classification is covered
  • policy-conflict report emission is covered
  • harmful-outcome contradiction behavior remains covered

This tranche does not yet introduce:

  • automatic challenge or isolation mutation from policy-conflict findings
  • expanded contradiction arbitration across audit/evolution surfaces
  • operator review-surface redesign
  • broader Phase 7 final closeoff

Those remain for:

  • P7-4 review-surface and policy-visibility improvements
  • P7-5 broader safety verification and final Phase 7 closeoff

Swarm attribution

A real swarm lane was launched on swarm2 for bounded P7-3 execution support and produced the same minimal tranche shape: a new P7-3 plan artifact plus the Challenger-based policy_conflict slice. The controller verified the landed files, ran authoritative local verification, fixed the public-vocabulary wording in the plan artifact, and authored the canonical closeoff.

Outcome

ShyftR now has a complete P7-3 minimal safety fixture tranche for the intended local scope:

  • prompt-injection-like spark text is no longer just generic ambiguity in Challenger reports
  • a stable policy_conflict report path now exists
  • harmful contradiction behavior remains intact
  • repo-wide verification remains green

One-line summary

Phase 7 P7-3 is done locally: ShyftR now classifies prompt-injection-like spark evidence as policy_conflict in fixture-safe Challenger reports while preserving existing contradiction behavior and staying repo-wide green.