fix(api-proxy): prevent stream_options injection into OpenAI Responses API requests

[Copilot]

injectStreamOptions() was injecting stream_options: { include_usage: true } into Responses API (/responses) requests, which the API rejects outright. Codex CLI sends the path without a leading slash (api.path="responses"), bypassing the existing regex guard and crashing all Codex workflows with exit code 1.

Changes

• body-transform.js

  • Make leading slash optional in the path guard regex:

    // Before — requires leading slash, misses "responses" bare path
    if (/^\/(?:v\d+\/)?responses(?:\/|$)/.test(pathOnly)) return null;
    
    // After — handles both "/responses" and "responses"
    if (/^\/?(?:v\d+\/)?responses(?:\/|$)/.test(pathOnly)) return null;

  • Add a body-shape secondary guard: if the parsed body has input but no messages array (canonical Responses API shape), skip injection regardless of path:

    if (parsed.input !== undefined && !Array.isArray(parsed.messages)) return null;

• body-transform.test.js

  • Add cases for bare paths (responses, v1/responses, v1/responses?foo=1)
  • Add case for body-shape guard on an unrecognised path
  • Add case confirming guard doesn't fire when both input and messages are present

[github-actions]

✅ Coverage Check Passed

Overall Coverage

Metric	Base	PR	Delta
Lines	96.54%	96.58%	📈 +0.04%
Statements	96.38%	96.42%	📈 +0.04%
Functions	97.99%	97.99%	➡️ +0.00%
Branches	90.78%	90.82%	📈 +0.04%

📁 Per-file Coverage Changes (1 files)

File	Lines (Before → After)	Statements (Before → After)
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

[Copilot]

Pull request overview

This PR updates the API proxy’s request body transformation logic to avoid injecting stream_options: { include_usage: true } into OpenAI Responses API (/responses) requests, which reject that field and can break streaming workflows.

Changes:

• Broaden the /responses path guard in injectStreamOptions() to also match paths that omit a leading / (and still handle versioned forms).
• Add a secondary “body-shape” guard: when the JSON body has input but no messages[], treat it as Responses-API-shaped and skip injection even if the path is unexpected.
• Extend unit tests to cover bare-path variants and the new body-shape behavior.

Show a summary per file

File	Description
containers/api-proxy/body-transform.js	Adjusts stream options injection guards to reliably exclude Responses API requests (path + body-shape).
containers/api-proxy/body-transform.test.js	Adds test coverage for bare-path responses variants and the new body-shape guard logic.

Copilot's findings

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

[github-actions]

Smoke Test Results: Claude

• ✅ GitHub API: 2 recent PRs fetched
• ✅ GitHub check (Playwright): PASS
• ✅ File verify: smoke-test-claude-26424429137.txt exists

Total: PASS

💥 [THE END] — Illustrated by Smoke Claude

[github-actions]

🔍 Smoke Test: API Proxy OpenTelemetry Tracing

Scenario	Result	Notes
1. Module Loading	✅	otel.js loads successfully; exports: startRequestSpan, setTokenAttributes, endSpan, endSpanError, shutdown, isEnabled
2. Test Suite	✅	33/33 tests passed (otel.test.js) — spans, token attrs, parent context, exporters, shutdown
3. Env Var Forwarding	✅	api-proxy-service.ts forwards OTEL_EXPORTER_OTLP_ENDPOINT, OTEL_EXPORTER_OTLP_HEADERS, GITHUB_AW_OTEL_TRACE_ID, GITHUB_AW_OTEL_PARENT_SPAN_ID, OTEL_SERVICE_NAME
4. Token Tracker Integration	✅	onUsage callback exists in token-tracker-http.js (line 237) as the OTEL hook point
5. OTEL Diagnostics	✅	Graceful degradation confirmed — file fallback to /var/log/api-proxy/otel.jsonl when OTLP endpoint unset; no network traffic without opt-in

All scenarios pass. ✅

📡 OTel tracing validated by Smoke OTel Tracing

[github-actions]

🔬 Smoke Test Results

Test	Status
GitHub MCP connectivity	✅
GitHub.com HTTP connectivity	⚠️ N/A (pre-step vars not expanded)
File write/read	⚠️ N/A (pre-step vars not expanded)

PR: fix(api-proxy): prevent stream_options injection into OpenAI Responses API requests
Author: @Copilot | Assignees: @lpcox, @Copilot

Overall: PARTIAL — MCP ✅, pre-computed test data unavailable (template substitution did not occur)

📰 BREAKING: Report filed by Smoke Copilot

[github-actions]

Smoke Test: Copilot BYOK (Offline) Mode

Test	Result
GitHub MCP (list PRs)	✅ PR #3803 "Filter unresolvable model aliases from /reflect and models.json"
GitHub.com connectivity	⚠️ Pre-step data unavailable (template vars not expanded)
File write/read	⚠️ Pre-step data unavailable (template vars not expanded)
BYOK inference (this response)	✅

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

Author: @Copilot · Assignees: @lpcox, @Copilot

Overall: PASS (core BYOK path verified; pre-step outputs were not interpolated)

🔑 BYOK report filed by Smoke Copilot BYOK

[github-actions]

Chroot Runtime Version Comparison

Runtime	Host Version	Chroot Version	Match?
Python	Python 3.12.13	Python 3.12.3	❌
Node.js	v24.15.0	v22.22.3	❌
Go	go1.22.12	go1.22.12	✅

Result: Not all tests passed. Python and Node.js versions differ between host and chroot environments. Go matches.

Tested by Smoke Chroot

[github-actions]

fix(api-proxy): prevent stream_options injection into OpenAI Responses API requests
Filter unresolvable model aliases from /reflect and models.json
chore: upgrade all workflows to gh-aw v0.75.4

✅ Playwright
✅ File write
❌ Build (TS5107)
Overall: FAIL

🔮 The oracle has spoken through Smoke Codex

[github-actions]

Smoke Test Results

• GitHub MCP Testing: ❌ (mcpscripts not found)
• GitHub.com Connectivity: ❌ (SSL error 35)
• File Writing Testing: ✅
• Bash Tool Testing: ✅

Overall status: FAIL

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]

Smoke Test: GitHub Actions Services Connectivity

Check	Result
Redis PING	❌ Timeout/unreachable
PostgreSQL pg_isready	❌ Timeout/unreachable
PostgreSQL SELECT 1	❌ Timeout/unreachable

Overall: FAIL — host.docker.internal is not reachable from this environment. Service containers may not be running or the hostname is not resolvable.

🔌 Service connectivity validated by Smoke Services

[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	✅	1/1 passed	✅ PASS
Go	env	✅	1/1 passed	✅ PASS
Go	uuid	✅	1/1 passed	✅ PASS
Java	gson	✅	1/1 passed	✅ PASS
Java	caffeine	✅	1/1 passed	✅ PASS
Node.js	clsx	✅	All passed	✅ PASS
Node.js	execa	✅	All passed	✅ PASS
Node.js	p-limit	✅	All passed	✅ PASS
Rust	fd	✅	1/1 passed	✅ PASS
Rust	zoxide	✅	1/1 passed	✅ PASS

Overall: 8/8 ecosystems passed — ✅ PASS

Generated by Build Test Suite for issue #3805 · sonnet46 1.3M · ◷