<!-- task=m-node-provider-execution-liveness-recovery/12+08_health_overlay_observability plan=5 tag=REVIEW_REVIEW_REVIEW_REFACTOR milestone-task=ops-evidence -->

# Complete - m-node-provider-execution-liveness-recovery/12+08_health_overlay_observability

## Completion Date

2026-08-05

## Summary

Completed Edge provider-health overlay observability and its raw/high-cardinality leakage guard after six plan iterations and four official review verdicts; final verdict PASS.

## Loop History

| Plan | Review | Verdict | Notes |
|------|--------|---------|-------|
| `plan_cloud_G08_0.log` | `code_review_cloud_G08_0.log` | NO VERDICT | Preparation pair was replanned before implementation to close collector-lifetime and verification-scope gaps. |
| `plan_cloud_G08_1.log` | `code_review_cloud_G08_1.log` | NO VERDICT | Preparation pair was replanned before implementation to remove concurrent documentation ownership collisions. |
| `plan_cloud_G08_2.log` | `code_review_cloud_G08_2.log` | FAIL | Required state-transition, snapshot, production recovery-path, and verification evidence was incomplete. |
| `plan_cloud_G04_3.log` | `code_review_cloud_G04_3.log` | FAIL | The leakage oracle did not exercise direct normalized/tunnel identity and raw payload inputs. |
| `plan_cloud_G03_4.log` | `code_review_cloud_G03_4.log` | FAIL | Four remaining direct protobuf identity/raw fields were still absent from the forbidden-input oracle. |
| `plan_cloud_G03_5.log` | `code_review_cloud_G03_5.log` | PASS | Every remaining direct field uses a distinct forbidden sentinel; source inspection and fresh focused, repeated, package, race, vet, and diff verification passed. |

## Implementation and Cleanup

- Added bounded post-decision provider-health metrics and structured logs for applied, stale-rejected, and recovered overlay evidence without exposing provider, node, run, session, adapter, target, payload, or credential values.
- Preserved normalized and tunnel unavailable/stale/recovery coverage, public provider snapshots, production `Capabilities` recovery, duplicate-terminal handling, collector reuse, and post-lock observation.
- Strengthened `TestProviderHealthObservabilityDoesNotExposeSentinels` so direct `RunEvent` and `ProviderTunnelFrame` identity, raw payload, header, error, and failure-metadata inputs are all included in the complete forbidden-value scan.

## Final Verification

- `go test -v -count=1 ./apps/edge/internal/service -run '^TestProviderHealthObservability'` - PASS; normalized, tunnel, duplicate-evidence, collector-reuse, post-lock, and forbidden-sentinel tests passed.
- `go test -count=20 ./apps/edge/internal/service -run '^TestProviderHealthObservabilityDoesNotExposeSentinels$'` - PASS; all 20 iterations passed.
- `go test -count=20 ./apps/edge/internal/service -run '^TestProviderHealthObservability'` - PASS; all 20 iterations passed.
- `go test -timeout=90s -count=1 ./apps/edge/internal/service` - PASS in 6.094s.
- `go test -race -count=3 ./apps/edge/internal/service -run '^TestProviderHealthObservability'` - PASS with no race report.
- `go vet ./apps/edge/internal/service` - PASS with no diagnostics.
- `git diff --check` - PASS with no whitespace errors.

## Remaining Nits

- None.

## Follow-up Work

- None.
