[ThomasK33]

Summary

Eight loop test files that touch no file themselves now build their HistoryService on the SessionFilesMemory layer. Only their own createTestHistoryService calls change; harness calls keep the Node layer. Test-only.

Background

Phase 2 of the agent-loop host-ports refactor puts HistoryService's node:fs calls behind an Effect service, SessionFiles, with a Node layer for the app and a memfs layer for tests. The change is behaviour-neutral: session files keep their bytes and format, downgrade keeps working, and nothing user-visible changes. This PR is one layer of a GitHub-native stack; each layer keeps the full suite green.

Implementation

agentSession.compactionContextExceeded, agentSession.postCompactionRefresh, agentSession.preStreamError, aiService.turnCompletion, contextManagement/compactionRequests, idleCompactionService, streamManager.chaos and streamManager.modelOnlyNotifications pass { files: SessionFilesMemory }. None of them imports fs or reads a session path, so no assertion depends on disk.

Validation

• Each file passes 3 runs on the memory layer. idleCompactionService runs about 45% faster and streamManager.chaos about 32% faster; the others change by under 15%.
• The loop-test tripwire against the base branch.
• Known CI flake until 🤖 tests: let the kill test wait until the new backend releases its turn #7320 merges: the phase 4 kill test src/node/services/sessionLocks/backendKill.test.ts ("a SIGKILL in a turn recovers as today") can fail on a race that 🤖 tests: let the kill test wait until the new backend releases its turn #7320 fixes. A failed job gets one rerun.

Risks

Low: test-only.

---

Generated with xum • Model: anthropic:claude-opus-5-5 • Thinking: high • Cost: $30.26

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-23T09:01:00.865777Z	fa51108	New commits
🔒 Security Review	✅ Completed 2026-10-23T09:01:20.886225Z	fa51108	New commits

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[github-actions]

🟢 e2e stories (Haiku): 14 passed

27 agent steps · 7 replayed from cache · 31 model calls · 219.1k tokens (74% cached)
Spend: $0.09 of the $1.00 cap (proxy ledger)

All 14 tests in 9 files

	Test	Agent	Time
🟢	chatRestart.e2e.ts · 1 passed	2 steps · 4 calls	25.3s
🟢	a chat survives a restart of the server	2 steps · 4 calls	25.3s
🟢	compaction.e2e.ts · 1 passed	3 steps · 7 calls	45.0s
🟢	/compact replaces the old chat with a summary	3 steps · 7 calls	45.0s
🟢	pluginTrustRestart.e2e.ts · 1 passed	4 steps · 2 calls	9.5s
🟢	a trusted plugin hook stays trusted after the server restarts	4 steps · 2 calls	9.5s
🟢	settingsRoundTrip.e2e.ts · 1 passed	3 steps · 5 calls	31.1s
🟢	a chat survives trips through Settings	3 steps · 5 calls	31.1s
🟢	sidebarPerWorkspace.e2e.ts · 1 passed	4 steps · 1 call	5.6s
🟢	a new workspace starts with its right sidebar collapsed while another keeps it open	4 steps · 1 call	5.6s
🟢	smoke.e2e.ts · 1 passed	2 steps · 1 call	2.9s
🟢	the agent opens the playground workspace	2 steps · 1 call	2.9s
🟢	streamErrors.e2e.ts · 1 passed	1 step · 1 call	8.0s
🟢	stream errors show in the chat, and the chat recovers	1 step · 1 call	8.0s
🟢	todoNudge.e2e.ts · 1 passed	2 steps · 4 calls	25.5s
🟢	the agent finishes open TODO items after the turn-end nudge	2 steps · 4 calls	25.5s
🟢	touchAlignment.e2e.ts · 6 passed	6 steps · 6 calls	24.8s
🟢	the Settings close button is level with the title on a touch screen 390px wide	1 step · 1 call	3.7s
🟢	the Settings close button is level with the title on a touch screen 768px wide	1 step · 1 call	4.3s
🟢	Backup settings checkboxes are small and level with their labels on a touch phone	1 step · 1 call	4.2s
🟢	the heartbeat checkbox is small and level with its label on a touch phone	1 step · 1 call	3.2s
🟢	a reply's model and time stay on one line on a touch phone	1 step · 1 call	6.4s
🟢	the workspace actions menu stays on the title row on a touch phone	1 step · 1 call	3.1s

_{e2e 0.20.0 · 3m 1s · web · run artifacts}

🟢 e2e Electron stories (Haiku): 3 passed

3 agent steps · 3 model calls · 8.1k tokens (32% cached)
Spend: $0.01 of the $1.00 cap (proxy ledger)

All 3 tests in 3 files

	Test	Agent	Time
🟢	electron/deepLink.e2e.ts · 1 passed	1 step · 1 call	5.6s
🟢	a deep link of a second launch starts a chat in the running app	1 step · 1 call	5.6s
🟢	electron/menuBar.e2e.ts · 1 passed	1 step · 1 call	5.5s
🟢	the workspace menu bar is the desktop title bar	1 step · 1 call	5.5s
🟢	electron/smoke.e2e.ts · 1 passed	1 step · 1 call	4.8s
🟢	Xum Electron opens the playground workspace	1 step · 1 call	4.8s

_{e2e 0.20.0 · 17.9s · electron · run artifacts}

🟢 e2e agent repros (Haiku): no tests selected

Spend: $0.00 of the $1.00 cap (proxy ledger)

_{e2e 0.20.0 · 5.3s · 2 targets (web, phone) · run artifacts}

[ThomasK33]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Can't wait for the next one!

Reviewed commit: b9256adb7c

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[chatgpt-codex-connector]

🛡️ Codex Security Review · Automatically triggered

Security review completed. No security issues were found in this pull request.

Reviewed commit: b9256adb7c

View security finding report

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