refactor: share sbx ingress capability writer

[Copilot]

Bounded-agent and bounded-query each implemented the same security-sensitive capability file write path (openSync with secure flags, write, chmod, close). This PR removes that duplication by centralizing the file creation/hardening flow in one shared helper while preserving behavior.

• What changed

  • Added a shared bounded-runtime utility to write sbx ingress capability files with the existing atomic/safe semantics.
  • Updated:
    • src/bounded-agent/manager.ts
    • src/bounded-query/manager.ts
  • Both managers now delegate file creation + permission hardening to the shared helper; capability payload generation remains unchanged at call sites.

• Security-sensitive behavior preserved

  • O_WRONLY | O_CREAT | O_EXCL | O_NOFOLLOW
  • initial mode 0o600
  • explicit fchmodSync(fd, 0o600) before close
  • closeSync in finally

• Result

  • Eliminates ~35 lines of duplicate code in a high-risk path.
  • Ensures bounded-agent and bounded-query stay aligned on inode/permission handling going forward.

// shared helper usage pattern
writeSbxIngressCapabilitiesFile(paths.capabilityPath, {
  version: 1,
  query: crypto.randomBytes(32).toString('hex'),
  probe: crypto.randomBytes(32).toString('hex'),
});

• Fixes [Duplicate Code] Bounded ingress capability file writer is duplicated #6952

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Copilot wasn't able to review any files in this pull request.

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✅ Copilot review passed with no inline comments.

@copilot Add the ready-for-aw label to this PR to trigger agentic CI smoke tests.

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✅ Coverage Check Passed

Overall Coverage

Metric	Base	PR	Delta
Lines	98.87%	98.89%	📈 +0.02%
Statements	98.75%	98.78%	📈 +0.03%
Functions	99.10%	99.10%	➡️ +0.00%
Branches	94.97%	94.97%	➡️ +0.00%

📁 Per-file Coverage Changes (2 files)

File	Lines (Before → After)	Statements (Before → After)
src/bounded-agent/manager.ts	98.7% → 98.6% (-0.03%)	98.7% → 98.7% (-0.02%)
src/log-directory-setup.ts	96.2% → 100.0% (+3.78%)	96.3% → 100.0% (+3.71%)

✨ New Files (1 files)

• src/bounded-execution/sbx-ingress-capabilities.ts: 100.0% lines

---

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

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✨ The prophecy is fulfilled... Smoke Codex has completed its mystical journey. The stars align. 🌟

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✅ Build Test Suite completed successfully!

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✅ Smoke Copilot BYOK completed. Copilot BYOK mode operational. 🔓

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🛡️ Smoke Copilot Network Isolation confirmed the egress allowlist is enforced. ✅

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Chroot tests passed! Smoke Chroot - All security and functionality tests succeeded.

[github-actions]

🔌 Smoke Services — All services reachable! ✅

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✅ Contribution Check completed successfully!

PR #6961 follows the contributing guidelines in the provided context: it adds tests for the new shared helper, keeps files under src/, and the PR description clearly explains the change and references Fixes #6952. No comment needed.

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🚀 Security Guard has started processing this pull request

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✅ Smoke Claude passed

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❌ Smoke Copilot BYOK AOAI (Entra) reports failed. AOAI BYOK (Entra) mode investigation needed...

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✅ Smoke Gemini completed. All facets verified. 💎

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❌ Smoke Copilot BYOK AOAI (api-key) reports failed. AOAI BYOK (api-key) mode investigation needed...

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📰 VERDICT: Smoke Copilot has concluded. All systems operational. This is a developing story. 🎤

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📡 Smoke OTel Tracing reports failed. OTel tracing regression detected. ⚠️

OTel Tracing Smoke Test — all scenarios passed ✅

1. Module Loading: ✅ otel.js loads successfully, isEnabled()=true, exports startRequestSpan/setTokenAttributes/setBudgetAttributes/endSpan/endSpanError/shutdown/isEnabled + internals.
2. Test Suite: ✅ 68/68 tests passed across otel.test.js, otel-fanout.test.js, otel-workload-identity.test.js (3 suites, 0 failures).
3. Env Var Forwarding: ✅ src/services/agent-environment/env-passthrough.ts forwards GITHUB_AW_OTEL_TRACE_ID and GITHUB_AW_OTEL_PARENT_SPAN_ID to the agent; src/services/api-proxy-env-config.ts forwards OTEL_EXPORTER_OTLP_ENDPOINT/HEADERS plus the same trace-context vars to api-proxy.
4. Token Tracker Integration: ✅ onUsage callback present in token-tracker-http.js (used as the OTEL hook point, invoked after normalized usage extraction, feeding setTokenAttributes/budget attributes).
5. OTEL Diagnostics: ✅ /tmp/gh-aw/otel.jsonl contains an exported resourceSpans record with service.name=gh-aw.smoke-otel-tracing and correct workflow/run metadata — spans were exported during this run.

No regressions detected. No issue filed; run triggered outside a PR comment context (issue/PR numbers not set), so reporting via noop per instructions.

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📰 VERDICT: Smoke Docker Sbx has concluded. All systems operational. This is a developing story. 🎤

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Smoke Test: Copilot BYOK (Direct) Mode

Recent merged PRs (MCP connectivity ✅):

• PR Upgrade gh-aw to v0.85.0 pre-release and recompile workflows #6957: Upgrade gh-aw to v0.85.0 pre-release and recompile workflows

• PR chore: update model-to-API mapping (2026-08-05) #6951: chore: update model-to-API mapping (2026-08-05)

• ✅ GitHub MCP connectivity

• ✅ GitHub.com connectivity (HTTP 200)

• ✅ File write/read test

• ✅ BYOK inference test (agent → api-proxy → api.githubcopilot.com)

Running in direct BYOK mode (COPILOT_PROVIDER_API_KEY) via api-proxy → api.githubcopilot.com

Overall: PASS ✅

cc @lpcox

🔑 BYOK report filed by Smoke Copilot BYOK
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Smoke Test: Claude Engine Validation

Check	Result
API Status	✅ PASS
GH Check	✅ PASS
File Status	✅ PASS

Overall Result: ✅ PASS

Generated by Smoke Claude for #6961 · haiku45 · 33.3 AIC · ⊞ 3.6K · ◷
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[github-actions]

Smoke Test: Copilot Engine

• ✅ GitHub MCP: list_pull_requests returned PR Upgrade gh-aw to v0.85.0 pre-release and recompile workflows #6957 (matches pre-fetched data)
• ✅ GitHub.com connectivity: HTTP 200
• ✅ File write/read: verified

Recent PRs: #6957 (Upgrade gh-aw to v0.85.0), #6951 (chore: model-to-API mapping)

Overall: PASS

cc @lpcox

📰 BREAKING: Report filed by Smoke Copilot
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EGRESS_RESULT allow=pass deny=pass

✅ Allowed domain (github.com) reachable: allowed=200
✅ Blocked domain (example.com) denied: CONNECT tunnel failed (403)

Overall: PASS

cc @lpcox

Warning

Firewall blocked 1 domain

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

• example.com

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

network:
  allowed:
    - defaults
    - "example.com"

See Network Configuration for more information.

🛡️ Egress verdict from Smoke Copilot Network Isolation
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Smoke Test: GitHub Actions Services Connectivity

• Redis PING: ❌ (DNS resolution failure)
• PostgreSQL pg_isready: ❌ (no response)
• PostgreSQL SELECT 1: ❌ (DNS resolution failure)

Overall: FAIL

All checks failed to resolve host.docker.internal ("Temporary failure in name resolution"). The AWF sandbox could not reach the host service containers.

🔌 Service connectivity validated by Smoke Services
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🏗️ 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 (run OK)	✅ PASS
.NET	json-parse	✅	N/A (run OK)	✅ 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	✅	1/1 passed	✅ PASS
Rust	zoxide	✅	1/1 passed	✅ PASS

Overall: 8/8 ecosystems passed — PASS

Note: Java builds required overriding Maven's local repository path (-Dmaven.repo.local) since ~/.m2/ was pre-created as root-owned and read-only in this environment (unrelated to the firewall proxy config, which worked correctly via ~/.m2/settings.xml).

Generated by Build Test Suite for #6961 · auto · 38.2 AIC · ⊞ 11.7K · ◷
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Chroot Version Comparison

Runtime	Host Version	Chroot Version	Match?
Python	Python 3.12.13	Python 3.12.13	✅ YES
Node.js	v24.18.0	v22.23.1	❌ NO
Go	go1.22.12	go1.22.12	✅ YES

Overall: FAILED — Node.js version mismatch between host and chroot environment. smoke-chroot label not applied.

Tested by Smoke Chroot
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[github-actions]

Smoke Test: Gemini Engine Validation

• GitHub MCP Testing: ❌ (Only docs: Sync schemas and specs with source changes #6950 found in local history)
• GitHub.com Connectivity: ❌ (HTTP 000 / Exit 7)
• File Writing Testing: ✅
• Bash Tool Testing: ✅

PR titles:

• docs: add boundedAgents.engine CLI mapping row to config spec (docs: Sync schemas and specs with source changes #6950)
• refactor: share sbx capability writer (refactor: share sbx ingress capability writer #6961)

Overall status: FAIL

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[github-actions]

• Upgrade gh-aw to v0.85.0 pre-release and recompile workflows
• chore: update model-to-API mapping (2026-08-05)
• PR history lookup: ✅
• Playwright GitHub title check: ✅
• File write/readback: ✅
• Discussion comment: ❌
• Build (npm ci && npm run build): ❌
• Overall: FAIL

Warning

Firewall blocked 1 domain

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

• registry.npmjs.org

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

network:
  allowed:
    - defaults
    - "registry.npmjs.org"

See Network Configuration for more information.

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[github-actions]

Smoke Test: Docker Sbx — PASS ✅

• ✅ GitHub MCP: PR Upgrade gh-aw to v0.85.0 pre-release and recompile workflows #6957, PR chore: update model-to-API mapping (2026-08-05) #6951 fetched
• ✅ GitHub.com connectivity: HTTP 200
• ✅ File write/read: verified

Overall: PASS

cc @lpcox

📰 BREAKING: Report filed by Smoke Docker Sbx
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