Narrow host-path prefix API surface

[Copilot]

translateBindMountHostPath was exported from src/services/host-path-prefix.ts even though production code only uses it internally through applyHostPathPrefixToVolumes. This change removes that unnecessary public symbol and keeps coverage on the public volume-rewrite entrypoint.

• API surface

  • Remove the translateBindMountHostPath export from src/services/host-path-prefix.ts
  • Keep applyHostPathPrefixToVolumes as the public interface for bind-mount source translation

• Test coverage

  • Update src/services/agent-volumes-mounts.test.ts to assert the shared /tmp fallback behavior via applyHostPathPrefixToVolumes
  • Stop reaching into a module-private helper from tests

• Result

  • Reduces accidental coupling to an implementation detail
  • Preserves existing behavior checks through the supported API

import { applyHostPathPrefixToVolumes } from './host-path-prefix';

expect(
  applyHostPathPrefixToVolumes(
    ['/etc/passwd:/host/etc/passwd:ro'],
    '/tmp/gh-aw',
  ),
).toEqual(['/etc/passwd:/host/etc/passwd:ro']);

[github-actions]

✅ Coverage Check Passed

Overall Coverage

Metric	Base	PR	Delta
Lines	96.46%	96.51%	📈 +0.05%
Statements	96.32%	96.36%	📈 +0.04%
Functions	98.26%	98.26%	➡️ +0.00%
Branches	90.61%	90.65%	📈 +0.04%

📁 Per-file Coverage Changes (2 files)

File	Lines (Before → After)	Statements (Before → After)
src/services/host-path-prefix.ts	89.3% → 88.9% (-0.40%)	90.6% → 90.3% (-0.30%)
src/config-writer.ts	89.3% → 90.9% (+1.65%)	89.3% → 90.9% (+1.65%)

---

Coverage comparison generated by scripts/ci/compare-coverage.ts

[github-actions]

Smoke Test: Claude Engine

• ✅ GitHub API: 2 recent PR entries loaded
• ✅ GitHub check: playwright_check=PASS
• ✅ File verify: smoke-test-claude-26685437417.txt present

Result: PASS

💥 [THE END] — Illustrated by Smoke Claude

[github-actions]

🔥 Smoke Test: Copilot BYOK (Offline) Mode

Test	Result
GitHub MCP connectivity	✅ (fetched PR #4049 via MCP)
GitHub.com HTTP	⚠️ pre-step data not injected (template unexpanded)
File write/read	⚠️ pre-step data not injected (template unexpanded)
BYOK inference (agent → api-proxy → api.githubcopilot.com)	✅ responding now

Running in BYOK offline mode (COPILOT_OFFLINE=true) via api-proxy → api.githubcopilot.com.

Overall: PARTIAL — BYOK inference path confirmed working; pre-step smoke data was not injected into the prompt template.

PR author: @Copilot | Assignees: @lpcox, @Copilot

🔑 BYOK report filed by Smoke Copilot BYOK

[github-actions]

🔬 Smoke Test Results

Test	Status
GitHub MCP connectivity	✅
GitHub.com HTTP	⚠️ pre-step data unavailable (template vars not substituted)
File write/read	⚠️ pre-step data unavailable (template vars not substituted)

PR: "Narrow host-path API surface" — author: @Copilot, assignees: @lpcox, @Copilot

Overall: PARTIAL — MCP confirmed working; pre-step outputs were not injected into task body.

📰 BREAKING: Report filed by Smoke Copilot

[Copilot]

Pull request overview

Narrows the host-path-prefix.ts API surface by removing the translateBindMountHostPath export and updating the lone test that referenced it to use the public applyHostPathPrefixToVolumes helper instead.

Changes:

• Make translateBindMountHostPath module-private in src/services/host-path-prefix.ts.
• Update agent-volumes-mounts.test.ts to assert /tmp staging fallback behavior via applyHostPathPrefixToVolumes.

Show a summary per file

File	Description
src/services/host-path-prefix.ts	Drops the export keyword on translateBindMountHostPath.
src/services/agent-volumes-mounts.test.ts	Switches the /etc/passwd//etc/group preservation test to the public helper.

Copilot's findings

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• Files reviewed: 2/2 changed files
• Comments generated: 0

[github-actions]

Chroot Runtime Version Comparison

Runtime	Host Version	Chroot Version	Match?
Python	Python 3.12.13	Python 3.12.3	❌
Node.js	v24.16.0	v22.22.3	❌
Go	go1.22.12	go1.22.12	✅

Result: ❌ Not all versions match — Python and Node.js versions differ between host and chroot environments.

Tested by Smoke Chroot

[github-actions]

Smoke Test: GitHub Actions Services Connectivity

Check	Result
Redis PING	❌ No response (timeout)
PostgreSQL pg_isready	❌ no response
PostgreSQL SELECT 1	❌ No response (timeout)

Overall: FAIL — host.docker.internal service containers are not reachable from this environment.

🔌 Service connectivity validated by Smoke Services

[github-actions]

Gemini Smoke Test: PASS\n- MCP: ✅\n - Deduplicate server test HTTPS_PROXY/module-reset bootstrap across split api-proxy tests\n - [docs] Document AWF_DIND env var and ARC/DinD sibling-socket auto-detection\n- Connectivity: ✅\n- File Writing: ✅\n- Bash: ✅

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

• localhost

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "localhost"

See Network Configuration for more information.

💎 Faceted by Smoke Gemini

[github-actions]

🏗️ Build Test Suite Results

Ecosystem	Project	Build/Install	Tests	Status
Bun	elysia	✅	1/1 passed	✅ PASS
Bun	hono	✅	1/1 passed	✅ PASS
C++	fmt	✅	N/A	✅ PASS
C++	json	✅	N/A	✅ PASS
Deno	oak	N/A	1/1 passed	✅ PASS
Deno	std	N/A	1/1 passed	✅ PASS
.NET	hello-world	✅	N/A	✅ PASS
.NET	json-parse	✅	N/A	✅ PASS
Go	color	✅	ok	✅ PASS
Go	env	✅	ok	✅ PASS
Go	uuid	✅	ok	✅ PASS
Java	gson	✅	1/1 passed	✅ PASS
Java	caffeine	✅	1/1 passed	✅ PASS
Node.js	clsx	✅	passed	✅ PASS
Node.js	execa	✅	passed	✅ PASS
Node.js	p-limit	✅	passed	✅ PASS
Rust	fd	✅	0/0 (ok)	✅ PASS
Rust	zoxide	✅	0/0 (ok)	✅ PASS

Overall: 8/8 ecosystems passed — ✅ PASS

Generated by Build Test Suite for issue #4052 · sonnet46 953.5K · ◷

[github-actions]

Reviewed merged PRs:

• Deduplicate server test HTTPS_PROXY/module-reset bootstrap across split api-proxy tests
• Deduplicate env var setup/restore blocks in agent-volumes-mounts tests

Checks: GitHub ✅ Playwright ✅ File ✅ Discussion ✅ Build ❌
Overall: FAIL

🔮 The oracle has spoken through Smoke Codex