# Complete - m-iop-agent-cli-runtime/11+06_workspace_overlay

## Completed At

2026-07-29

## Summary

Closed the workspace-overlay confinement task after four review loops with a final PASS. The executable confinement boundary now prevents provider launch plans from forwarding pre-opened protected descriptors through child stdio.

## Loop History

| Plan | Review | Verdict | Notes |
|------|--------|---------|-------|
| `plan_cloud_G09_0.log` | `code_review_cloud_G09_0.log` | FAIL | Required real executable confinement and immutable canonical/config/grant identity binding. |
| `plan_cloud_G10_1.log` | `code_review_cloud_G10_1.log` | FAIL | Required metadata-complete Linux confinement and a Manager-owned proof start boundary. |
| `plan_cloud_G10_2.log` | `code_review_cloud_G10_2.log` | FAIL | Required removal of caller-owned stdio that could forward a pre-opened writable descriptor. |
| `plan_cloud_G10_3.log` | `code_review_cloud_G10_3.log` | PASS | Proof-owned child pipes, exact handle binding, cleanup, contracts, and fresh verification passed. |

## Implementation and Cleanup

- Reduced `ConfinementCommand` to executable name, arguments, and environment.
- Added a proof-owned `StartedConfinement` handle containing the exact child and parent-side stdin/stdout/stderr pipes.
- Made the Manager bind the exact proof-created handle and abort incomplete or failed partial launches.
- Added real confinement and Manager regressions for descriptor exclusion, handle identity, pipe closure, child termination, and reaping.
- Synchronized `iop.agent-runtime` and `iop.agent-cli-runtime` with the prepare → proof-owned start/I/O → bind ownership boundary.

## Final Verification

- `command -v go && readlink -f "$(command -v go)" && go version && go env GOROOT` — PASS; `/config/opt/go/bin/go`, Go 1.26.2 linux/arm64.
- `go test -count=1 -run '^(TestConfinement|TestOverlayBackendConfinement)' -v ./packages/go/agentworkspace` — PASS; proof-owned pipes and real Linux content/metadata confinement passed.
- `go test -count=1 -run '^(TestValidatePreparedIsolation|TestManager.*Confinement|TestDispatch.*Confinement)' -v ./packages/go/agenttask` — PASS; exact start/bind identity and all partial-failure cleanup cases passed.
- `go test -count=1 ./packages/go/agentworkspace ./packages/go/agentguard ./packages/go/agenttask` — PASS.
- `go test -count=20 ./packages/go/agentworkspace` — PASS.
- `go test -count=1 -race ./packages/go/agentworkspace ./packages/go/agenttask` — PASS.
- `go test -count=1 ./packages/go/...` — PASS.
- `CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go test -c -o /dev/null ./packages/go/agentworkspace` — PASS.
- `go vet ./packages/go/...` — PASS.
- `gofmt -d packages/go/agentworkspace packages/go/agentguard packages/go/agenttask` — PASS; no output.
- `rg --sort path 'ConfinementCommand|ProviderLaunch|BindStarted|Confinement\.Start' packages/go` and launch-I/O searches — PASS; no caller-supplied stdio or stale start path remains.
- `git diff --check` — PASS.

## Roadmap Completion

- Milestone: `agent-roadmap/phase/automation-runtime-bridge/milestones/iop-agent-cli-runtime.md`
- Milestone link: [IOP Agent CLI Runtime](../../../../../../agent-roadmap/phase/automation-runtime-bridge/milestones/iop-agent-cli-runtime.md)
- Completed task ids:
  - `overlay-workspace`: PASS; evidence=`agent-task/archive/2026/07/m-iop-agent-cli-runtime/11+06_workspace_overlay/plan_cloud_G10_3.log`, `agent-task/archive/2026/07/m-iop-agent-cli-runtime/11+06_workspace_overlay/code_review_cloud_G10_3.log`; verification=focused real confinement and Manager tests, target suites, repetition, race, package-wide tests, Darwin compile, vet, formatting, symbol searches, and diff integrity.
- Not completed task ids: None.

## Residual Nits

- None.

## Follow-up Work

- None.
