diff --git a/tests/e2e/coverage_registry/README.md b/tests/e2e/coverage_registry/README.md
index aef4c16c89a..115dc842770 100644
--- a/tests/e2e/coverage_registry/README.md
+++ b/tests/e2e/coverage_registry/README.md
@@ -67,13 +67,27 @@ Strict mode exits non-zero on `@pytest.mark.covers(...)` ids that are not checke
 the registry. Add `--fail-on-collection-errors` when the job should also fail on pytest
 collection errors.
 
+## Tiering policy
+
+Tier is what we commit to, not how interesting a behavior is. The signed-off rules:
+
+- guardrails: the surfaces we commit to are bedrock guardrails, OpenAI moderations,
+  the LiteLLM content filter, LLM-as-a-judge and presidio masking. Third-party vendor
+  guardrails are tail and sit at P2
+- AIM stays P2 until its DRI lands a mock AIM server; there is no live AIM tenant in CI,
+  so promoting it would only buy a permanently red or permanently skipped cell
+- logging: s3, GCS, prometheus, datadog and OTEL are P0 on success, failure and stream
+  where the path exists. The remaining eval/analytics/cost destinations are tail at P2
+- auth: virtual keys and JWT are the committed paths at P0. OAuth2 introspection and the
+  IP allowlist are P2
+- P0 + P1 is the number the team is driving to 95%; P2 rows stay enumerated so a tail gap
+  is visible, but they do not gate the target
+
 ## Status: this is a draft for review
 
-The cells were enumerated from the codebase and the tiers are a first proposal. Known
-things to settle before treating the set as final:
+The cells were enumerated from the codebase. Known things to settle before treating the
+set as final:
 
-- tiers are proposed, not signed off; 125 P0 is a lot to prove fail-before-fix, so P0 may
-  want tightening
 - a few cells need a support check or a prune (for example `llm.embeddings.anthropic.*`
   and `reliability.perf.throughput.under_slo`)
 - auth is covered in two places (`other.auth.*` and the mgmt authz assertions); the
diff --git a/tests/e2e/coverage_registry/guardrail.yaml b/tests/e2e/coverage_registry/guardrail.yaml
index d54c12ba6dc..a4349595e58 100644
--- a/tests/e2e/coverage_registry/guardrail.yaml
+++ b/tests/e2e/coverage_registry/guardrail.yaml
@@ -10,25 +10,25 @@
 - {id: guardrail.litellm_content_filter.apply_endpoint.allows, module: guardrail, tier: P0, hook_point: apply_endpoint, assertions: [allows], exercised_on: [chat_completions], source: "guardrail_endpoints.py:apply_guardrail", rationale: "POST /guardrails/apply_guardrail returns clean text for allowed input"}
 - {id: guardrail.bedrock.during.blocks, module: guardrail, tier: P0, hook_point: during, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/bedrock_guardrails.py", rationale: "During-call moderation for streaming"}
 - {id: guardrail.bedrock.post_call.blocks, module: guardrail, tier: P0, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/bedrock_guardrails.py", rationale: "Block harmful output"}
-- {id: guardrail.lakera.pre_call.blocks, module: guardrail, tier: P0, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions, messages], source: "guardrail_hooks/lakera_ai_v2.py", rationale: "Prompt-injection block pre-execution"}
-- {id: guardrail.lakera.post_call.blocks, module: guardrail, tier: P0, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/lakera_ai_v2.py", rationale: "Post-call injection on multi-turn chains"}
+- {id: guardrail.lakera.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions, messages], source: "guardrail_hooks/lakera_ai_v2.py", rationale: "Prompt-injection block pre-execution"}
+- {id: guardrail.lakera.post_call.blocks, module: guardrail, tier: P2, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/lakera_ai_v2.py", rationale: "Post-call injection on multi-turn chains"}
 - {id: guardrail.openai_moderations.pre_call.blocks, module: guardrail, tier: P0, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions, messages], source: "guardrail_hooks/openai/moderations.py", rationale: "Content policy for regulated industries"}
-- {id: guardrail.aim.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions, messages], source: "guardrail_hooks/aim/aim.py", rationale: "Security guardrail malicious-input"}
-- {id: guardrail.aim.post_call.blocks, module: guardrail, tier: P1, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/aim/aim.py", rationale: "Output security check"}
-- {id: guardrail.ibm_guardrails.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/ibm_guardrails/ibm_detector.py", rationale: "Enterprise multi-policy"}
-- {id: guardrail.ibm_guardrails.post_call.blocks, module: guardrail, tier: P1, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/ibm_guardrails/ibm_detector.py", rationale: "Output policy validation"}
-- {id: guardrail.semantic_guard.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/semantic_guard", rationale: "Semantic policy compliance"}
+- {id: guardrail.aim.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions, messages], source: "guardrail_hooks/aim/aim.py", rationale: "Security guardrail malicious-input. P2 until the DRI lands a mock AIM server; no live AIM tenant in CI"}
+- {id: guardrail.aim.post_call.blocks, module: guardrail, tier: P2, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/aim/aim.py", rationale: "Output security check. P2 until the DRI lands a mock AIM server; no live AIM tenant in CI"}
+- {id: guardrail.ibm_guardrails.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/ibm_guardrails/ibm_detector.py", rationale: "Enterprise multi-policy"}
+- {id: guardrail.ibm_guardrails.post_call.blocks, module: guardrail, tier: P2, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/ibm_guardrails/ibm_detector.py", rationale: "Output policy validation"}
+- {id: guardrail.semantic_guard.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/semantic_guard", rationale: "Semantic policy compliance"}
 - {id: guardrail.block_code_execution.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/block_code_execution", rationale: "Code-injection prevention"}
 - {id: guardrail.tool_permission.pre_call.allows, module: guardrail, tier: P1, hook_point: pre_call, assertions: [allows], exercised_on: [chat_completions], source: "guardrail_hooks/tool_permission.py", rationale: "Grant allowed tools"}
 - {id: guardrail.tool_permission.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/tool_permission.py", rationale: "Block unauthorized tools"}
-- {id: guardrail.microsoft_purview.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/microsoft_purview/purview_dlp.py", rationale: "DLP sensitive-data disclosure"}
-- {id: guardrail.headroom.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/headroom/headroom.py", rationale: "Anomaly detection threshold"}
-- {id: guardrail.generic_guardrail_api.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/generic_guardrail_api/generic_guardrail_api.py", rationale: "Vendor-agnostic custom API"}
-- {id: guardrail.pangea.pre_call.blocks, module: guardrail, tier: P1, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/pangea/pangea.py", rationale: "API security + DLP"}
+- {id: guardrail.microsoft_purview.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/microsoft_purview/purview_dlp.py", rationale: "DLP sensitive-data disclosure"}
+- {id: guardrail.headroom.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/headroom/headroom.py", rationale: "Anomaly detection threshold"}
+- {id: guardrail.generic_guardrail_api.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/generic_guardrail_api/generic_guardrail_api.py", rationale: "Vendor-agnostic custom API"}
+- {id: guardrail.pangea.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/pangea/pangea.py", rationale: "API security + DLP"}
 - {id: guardrail.niche_providers.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: grammar, rationale: "SMOKE cohort: lasso/hiddenlayer/model_armor/qualifire/guardrails_ai/cato/cisco/akto/prompt_security/promptguard/zscaler/vigil/etc"}
 - {id: guardrail.niche_providers.post_call.blocks, module: guardrail, tier: P2, hook_point: post_call, assertions: [blocks], exercised_on: [chat_completions], source: grammar, rationale: "SMOKE niche output filtering"}
 - {id: guardrail.niche_providers.pre_call.allows, module: guardrail, tier: P2, hook_point: pre_call, assertions: [allows], exercised_on: [chat_completions], source: grammar, rationale: "SMOKE niche allow-path passthrough"}
 - {id: guardrail.tool_policy.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/tool_policy/tool_policy_guardrail.py", rationale: "Tool-use policy enforcement"}
 - {id: guardrail.mcp_security.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [mcp_operations], source: "guardrail_hooks/mcp_security", rationale: "MCP protocol security"}
-- {id: guardrail.llm_as_a_judge.pre_call.blocks, module: guardrail, tier: P2, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/llm_as_a_judge", rationale: "LLM-based judgment guardrail"}
+- {id: guardrail.llm_as_a_judge.pre_call.blocks, module: guardrail, tier: P0, hook_point: pre_call, assertions: [blocks], exercised_on: [chat_completions], source: "guardrail_hooks/llm_as_a_judge", rationale: "LiteLLM-native judge guardrail; core supported surface, judge_model credential resolution regressed in production"}
 - {id: guardrail.litellm_content_filter.pre_mcp_call.blocks, module: guardrail, tier: P1, hook_point: pre_mcp_call, assertions: [blocks], exercised_on: [mcp_operations], source: "guardrail_hooks/litellm_content_filter/content_filter.py:_scan_mcp_tool_call_arguments", rationale: "A general content-filter guardrail configured mode=pre_mcp_call blocks a banned keyword in an MCP tool call's arguments before it reaches the upstream MCP server; a clean argument passes"}
diff --git a/tests/e2e/coverage_registry/logging.yaml b/tests/e2e/coverage_registry/logging.yaml
index 0f703632805..fa7026bfd12 100644
--- a/tests/e2e/coverage_registry/logging.yaml
+++ b/tests/e2e/coverage_registry/logging.yaml
@@ -10,16 +10,16 @@
 - {id: logging.otel.stream.exports_metric, module: logging, tier: P0, event: stream, assertions: [exports_metric], exercised_on: [chat_completions, messages, responses], source: "integrations/otel/logger.py", rationale: "Streaming closes the LLM span from the stream path; historically prone to duplicate/orphaned spans"}
 - {id: logging.otel.stream.records_ttft, module: logging, tier: P1, event: stream, assertions: [records_ttft], exercised_on: [chat_completions, messages, responses], source: "integrations/otel/mappers/genai.py", rationale: "TTFT is the streaming latency SLI; a zero or span-length value silently corrupts dashboards"}
 - {id: logging.otel.failure.exports_metric, module: logging, tier: P0, event: failure, assertions: [exports_metric], exercised_on: [chat_completions, messages], source: "integrations/otel/logger.py", rationale: "Error spans for observability continuity"}
-- {id: logging.braintrust.success.logs_spend, module: logging, tier: P1, event: success, assertions: [logs_spend], exercised_on: [chat_completions, messages], source: "integrations/braintrust_logging.py", rationale: "Evals platform spend"}
-- {id: logging.langsmith.success.logs_spend, module: logging, tier: P1, event: success, assertions: [logs_spend], exercised_on: [chat_completions, messages], source: "integrations/langsmith.py", rationale: "LangChain ecosystem"}
-- {id: logging.arize.success.logs_spend, module: logging, tier: P1, event: success, assertions: [logs_spend], exercised_on: [chat_completions, embeddings], source: "integrations/arize/arize.py", rationale: "ML-ops observability"}
-- {id: logging.mlflow.success.logs_spend, module: logging, tier: P1, event: success, assertions: [logs_spend], exercised_on: [chat_completions], source: "integrations/mlflow.py", rationale: "Experiment tracking cost/run"}
-- {id: logging.opik.success.logs_spend, module: logging, tier: P1, event: success, assertions: [logs_spend], exercised_on: [chat_completions], source: "integrations/opik/opik.py", rationale: "Eval platform spend/case"}
-- {id: logging.openmeter.success.exports_metric, module: logging, tier: P1, event: success, assertions: [exports_metric], exercised_on: [chat_completions, messages, embeddings], source: "integrations/openmeter.py", rationale: "Usage metering for billing"}
-- {id: logging.literal_ai.success.logs_spend, module: logging, tier: P1, event: success, assertions: [logs_spend], exercised_on: [chat_completions, messages], source: "integrations/literal_ai.py", rationale: "Tracing platform spend"}
-- {id: logging.posthog.success.exports_metric, module: logging, tier: P1, event: success, assertions: [exports_metric], exercised_on: [chat_completions, messages], source: "integrations/posthog.py", rationale: "Product analytics batching"}
-- {id: logging.azure_storage.success.writes_object, module: logging, tier: P1, event: success, assertions: [writes_object], exercised_on: [chat_completions, messages], source: "integrations/azure_storage/azure_storage.py", rationale: "Azure blob for enterprise"}
-- {id: logging.cloudzero.success.logs_spend, module: logging, tier: P1, event: success, assertions: [logs_spend], exercised_on: [chat_completions], source: "integrations/cloudzero/cloudzero.py", rationale: "Cost ops correlation"}
-- {id: logging.focus.success.writes_object, module: logging, tier: P1, event: success, assertions: [writes_object], exercised_on: [chat_completions, messages], source: "integrations/focus/focus_logger.py", rationale: "Cost mgmt multi-destination export"}
+- {id: logging.braintrust.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions, messages], source: "integrations/braintrust_logging.py", rationale: "Evals platform spend"}
+- {id: logging.langsmith.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions, messages], source: "integrations/langsmith.py", rationale: "LangChain ecosystem"}
+- {id: logging.arize.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions, embeddings], source: "integrations/arize/arize.py", rationale: "ML-ops observability"}
+- {id: logging.mlflow.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions], source: "integrations/mlflow.py", rationale: "Experiment tracking cost/run"}
+- {id: logging.opik.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions], source: "integrations/opik/opik.py", rationale: "Eval platform spend/case"}
+- {id: logging.openmeter.success.exports_metric, module: logging, tier: P2, event: success, assertions: [exports_metric], exercised_on: [chat_completions, messages, embeddings], source: "integrations/openmeter.py", rationale: "Usage metering for billing"}
+- {id: logging.literal_ai.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions, messages], source: "integrations/literal_ai.py", rationale: "Tracing platform spend"}
+- {id: logging.posthog.success.exports_metric, module: logging, tier: P2, event: success, assertions: [exports_metric], exercised_on: [chat_completions, messages], source: "integrations/posthog.py", rationale: "Product analytics batching"}
+- {id: logging.azure_storage.success.writes_object, module: logging, tier: P2, event: success, assertions: [writes_object], exercised_on: [chat_completions, messages], source: "integrations/azure_storage/azure_storage.py", rationale: "Azure blob for enterprise"}
+- {id: logging.cloudzero.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions], source: "integrations/cloudzero/cloudzero.py", rationale: "Cost ops correlation"}
+- {id: logging.focus.success.writes_object, module: logging, tier: P2, event: success, assertions: [writes_object], exercised_on: [chat_completions, messages], source: "integrations/focus/focus_logger.py", rationale: "Cost mgmt multi-destination export"}
 - {id: logging.niche_integrations.success.logs_spend, module: logging, tier: P2, event: success, assertions: [logs_spend], exercised_on: [chat_completions], source: grammar, rationale: "SMOKE cohort: athina/galileo/deepeval/langtrace/weave/lunary/humanloop/traceloop/helicone/argilla/newrelic/sqs/supabase/dynamodb/agentops/lago/etc"}
 - {id: logging.niche_integrations.failure.logs_spend, module: logging, tier: P2, event: failure, assertions: [logs_spend], exercised_on: [chat_completions], source: grammar, rationale: "SMOKE niche failure path"}
diff --git a/tests/e2e/coverage_registry/other.yaml b/tests/e2e/coverage_registry/other.yaml
index ace4f8bcdc9..2ec25ca86f1 100644
--- a/tests/e2e/coverage_registry/other.yaml
+++ b/tests/e2e/coverage_registry/other.yaml
@@ -7,12 +7,12 @@
 - {id: other.auth.jwt.expired_denied, module: other, tier: P0, area: auth, assertions: [expired_denied], source: "handle_jwt.py:125-135", rationale: "Expired JWT rejected even with valid signature"}
 - {id: other.auth.jwt.invalid_signature_denied, module: other, tier: P0, area: auth, assertions: [invalid_signature_denied], source: "handle_jwt.py:145-150", rationale: "Bad/missing signature fails verification"}
 - {id: other.auth.virtual_key.route_permission_enforced, module: other, tier: P0, area: auth, assertions: [route_permission_enforced], source: "route_checks.py:89-151", rationale: "allowed_routes whitelist denies disallowed routes"}
-- {id: other.auth.virtual_key.route_group_allowed, module: other, tier: P1, area: auth, assertions: [route_group_allowed], source: "route_checks.py:106-128", rationale: "allowed_routes=[llm_api_routes] grants all LLM endpoints"}
+- {id: other.auth.virtual_key.route_group_allowed, module: other, tier: P0, area: auth, assertions: [route_group_allowed], source: "route_checks.py:106-128", rationale: "allowed_routes=[llm_api_routes] grants all LLM endpoints"}
 - {id: other.auth.passthrough.model_allowlist_enforced, module: other, tier: P1, area: auth, assertions: [model_allowlist_enforced], source: "route_checks.py:135-151", rationale: "Passthrough enforces per-key model allow-lists"}
-- {id: other.auth.oauth2.token_valid_allows, module: other, tier: P1, area: auth, assertions: [token_valid_allows], source: "oauth2_check.py:15-73", rationale: "OAuth2 introspection grants active token"}
-- {id: other.auth.oauth2.token_invalid_denied, module: other, tier: P1, area: auth, assertions: [token_invalid_denied], source: "oauth2_check.py:37-73", rationale: "Expired/inactive OAuth2 token denied"}
-- {id: other.auth.ip_allowlist.internal_ip_allows, module: other, tier: P1, area: auth, assertions: [internal_ip_allows], source: "ip_address_utils.py:54-76", rationale: "Internal CIDR bypasses public-API restriction"}
-- {id: other.auth.ip_allowlist.external_ip_denied_to_private, module: other, tier: P1, area: auth, assertions: [external_ip_denied_to_private], source: "ip_address_utils.py:54-76", rationale: "External IP cannot reach internal-only resources"}
+- {id: other.auth.oauth2.token_valid_allows, module: other, tier: P2, area: auth, assertions: [token_valid_allows], source: "oauth2_check.py:15-73", rationale: "OAuth2 introspection grants active token"}
+- {id: other.auth.oauth2.token_invalid_denied, module: other, tier: P2, area: auth, assertions: [token_invalid_denied], source: "oauth2_check.py:37-73", rationale: "Expired/inactive OAuth2 token denied"}
+- {id: other.auth.ip_allowlist.internal_ip_allows, module: other, tier: P2, area: auth, assertions: [internal_ip_allows], source: "ip_address_utils.py:54-76", rationale: "Internal CIDR bypasses public-API restriction"}
+- {id: other.auth.ip_allowlist.external_ip_denied_to_private, module: other, tier: P2, area: auth, assertions: [external_ip_denied_to_private], source: "ip_address_utils.py:54-76", rationale: "External IP cannot reach internal-only resources"}
 - {id: other.lifecycle.readiness.public_probe, module: other, tier: P0, area: lifecycle, assertions: [public_probe], source: "_health_endpoints.py:1551-1570", rationale: "Unauthenticated /health/readiness safe for LBs"}
 - {id: other.lifecycle.readiness.reports_db_status, module: other, tier: P0, area: lifecycle, assertions: [reports_db_status], source: "_health_endpoints.py:1551-1570", rationale: "readiness distinguishes healthy vs DB-unreachable"}
 - {id: other.lifecycle.readiness.shutting_down_returns_503, module: other, tier: P0, area: lifecycle, assertions: [shutting_down_returns_503], source: "_health_endpoints.py:1554-1556", rationale: "Graceful shutdown drains LB via 503"}