feat(v21): Learned Policy decision outcome closed loop successor

[laiqian0239-glitch]

Work package

V21-LEARNING-POLICY-P1-DECISION-OUTCOME-CLOSED-LOOP-V2-SUCCESSOR

Authorized by ordinary two-parent merge c5b7d23dcd6a7aafef6f1b8749369ab008606c8b from #378.

Fresh failure-first topology

Exact current Head: 4d19aff5dae72b906d47276811ff8ad7b096c69d

It is the direct child of the fresh authorization merge and adds exactly the six authorization-frozen WP0 tests, with zero product/runtime/dependency implementation.

• changed paths: exactly 6
• six-test path-set SHA-256: 9aff346a55b16f1ae54a743daf15bb18cffc4c1471581556be1eea22acab3142
• additions: 317
• production code changed: false

The six test blobs are byte-identical to immutable historical #372 RED evidence, but this commit has new identity and fresh parentage from the post-ACV2 trusted main authorization. No historical commit was cherry-picked or rebased.

Expected fresh causal RED

Only the bounded missing Learned Policy contracts count:

• canonical DecisionRecord identity/persona/feature/action provenance;
• immutable raw OutcomeVector and eligible candidate_sent source binding;
• read-only projectPolicy over eligible immutable evidence;
• Vowpal Wabbit 9.11.2 sealed runtime and supply-chain closure;
• production consumption of only candidateStrategyBranch before existing frontier generation.

ACV2 Schema 23 and all existing authorities must remain GREEN on this test-only Head.

Authorized GREEN boundary

Exactly the original 22 paths, SHA-256 930bf654a0088c6729ca265443a30e77e895ea0f7a69517df51ac4f207008ff6. Vowpal Wabbit 9.11.2 (122bae254a5b8bc2b774d13b33d53e6dbc2cfba7, BSD-3-Clause) owns the bounded contextual-bandit action head. Existing Learning/Growth Brain, Person/Persona, immutable learning ledger, Langfuse reward authority and Model Brain/LiteLLM remain authoritative.

P1 remains actionProbability=1.0, exploration=false; final reply remains frontier-generated.

No product implementation may be added until this exact Head records fresh causal RED. No workflow/root npm mutation, live randomized exploration, local reply generator, second reward/model gateway/feature-store infrastructure, release, publish, rebase, squash or force push.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: e0840b39-a8e2-4f39-aa57-5d3757bead06

📥 Commits

Reviewing files that changed from the base of the PR and between a45b11d and f431223.

⛔ Files ignored due to path filters (1)

• runtime/learning-growth/python/uv.lock is excluded by !**/*.lock

📒 Files selected for processing (19)

• THIRD_PARTY_NOTICES.md
• backend/services/contextAwareReplyBrain.js
• backend/services/learningDeepTrainingContract.js
• backend/services/learningOutcomeAttributionService.js
• backend/services/learningPolicyDecisionContract.js
• backend/services/learningPolicyRuntimeAdapter.js
• backend/services/replyFeedbackLearningService.js
• backend/services/storeManagerService.js
• config/upstreams/v21-learning-growth-brain-p0.json
• runtime/learning-growth/python/learning_entrypoint.py
• runtime/learning-growth/python/pyproject.toml
• tests/wp0/v21-learning-policy-p1-decision-record.test.js
• tests/wp0/v21-learning-policy-p1-outcome-binding.test.js
• tests/wp0/v21-learning-policy-p1-production-consumption.test.js
• tests/wp0/v21-learning-policy-p1-projection.test.js
• tests/wp0/v21-learning-policy-p1-supply-chain.test.js
• tests/wp0/v21-learning-policy-p1-vw-runtime.test.js
• third_party/licenses/vowpal-wabbit-BSD-3-Clause.txt
• tools/uat/v21LearningPolicyClosedLoopEvidence.js

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[laiqian0239-glitch]

Superseded by the ordinary-merged V3 production-closure authority and implementation. The merged V3 authorization explicitly records PR #379 / head f431223dcd44e42dd7f1f81e02bd4d2f2949919c as immutable audit evidence that is not mergeable, and forbids reuse of this history as executable authority. V3 implementation PR #384 was ordinary-merged to trusted main as 9252ebba53d0e6d4bd0388a88ede2d0e74c7164c. Closing this stale V2 PR without rebasing, rewriting, cherry-picking, or touching its audit history.