Best possible solution:

Preserve provider metadata through stream-token consumption, add focused coverage that Telnyx outbound audio emits Telnyx-shaped media/clear behavior, keep docs/changelog aligned, and require redacted live Telnyx call proof before merge.

Do we have a high-confidence way to reproduce the issue?

Yes for the review finding by source inspection: the PR stores provider metadata in the stream token and then reads callerMeta.provider, while the current token consumer still returns only from, to, and direction. No real Telnyx runtime reproduction was provided by the contributor.

Is this the best way to solve the issue?

No: the direction is plausible, but the current diff is not mergeable because it drops the provider metadata needed to select Telnyx outbound audio framing. The safer solution is to preserve that metadata through consumeStreamToken and cover the outbound Telnyx pacer path.

Full review comments:

• [P2] Preserve provider metadata when consuming stream tokens — extensions/voice-call/src/webhook/realtime-handler.ts:624
buildProviderStreamUrl stores provider: "telnyx" in the pending stream token, but consumeStreamToken still returns only from, to, and direction. That leaves callerMeta.provider undefined here, so Telnyx streams use the Twilio-style clear/media/mark frames instead of the Telnyx branch this PR added.
  Confidence: 0.9

Overall correctness: patch is incorrect
Overall confidence: 0.86

What I checked:

• PR metadata and proof state: feat(voice-call): add Telnyx realtime media streams #79324 is an external PR with triage: needs-real-behavior-proof; the body lists test, lint, format, typecheck, and build commands but no live Telnyx call output, logs, screenshot, recording, or linked artifact. (464e488909ad)
• Patch drops the metadata needed by its Telnyx audio branch: The PR adds provider: callerMeta.provider to the realtime audio pacer, but the stream token consumer on current main returns only from, to, and direction, so callerMeta.provider will remain undefined unless that consumer is updated too. (extensions/voice-call/src/webhook/realtime-handler.ts:624, 464e488909ad)
• Current main token consumption evidence: On current main, consumeStreamToken deletes the token and returns only from, to, and direction; it does not preserve provider, providerCallId, or callId. (extensions/voice-call/src/webhook/realtime-handler.ts:481, 2d1f4f909ed6)
• Telnyx frame shape matters: Telnyx bidirectional media streaming sends RTP media using JSON media.payload frames and documents clear separately, so selecting the Telnyx-specific pacer branch instead of Twilio-style streamSid frames is material. (developers.telnyx.com)
• Related live Telnyx context: Search found related open Telnyx Voice Call issue [voice-call] Telnyx inbound calls answer and greet, but bot never replies — auto-response loop missing for webhook call.speech path #79118 describing real Telnyx call behavior, but it tracks the non-realtime webhook auto-response path rather than this PR's realtime media-stream implementation.
• Feature history routing: GitHub commit history for the central files shows recent Voice Call realtime and Telnyx ownership split across Peter Steinberger, Vincent Koc, and scoootscooob. (extensions/voice-call/src/webhook/realtime-handler.ts)

Likely related people:

• steipete: Recent Telnyx provider fixes, outbound realtime stream fixes, Voice Call refactors, and the original Voice Call parity work all route through this account in GitHub commit history. (role: maintainer and feature-history owner; confidence: high; commits: 42c17adb5e4d, 8a9d02dd82d4, 31d8fdb52587; files: extensions/voice-call/src/providers/telnyx.ts, extensions/voice-call/src/manager.ts, extensions/voice-call/src/webhook/realtime-handler.ts)
• vincentkoc: Recent commits changed Talk lifecycle logging, diagnostics, and bounded realtime audio pacing around the same realtime handler and pacer paths. (role: recent realtime and audio-path maintainer; confidence: medium; commits: 16321a27b64c, e2501b2d6db2, 7050af56d400; files: extensions/voice-call/src/webhook/realtime-handler.ts, extensions/voice-call/src/webhook/realtime-audio-pacer.ts)
• scoootscooob: Recent commits added and refined realtime Meet voice agent behavior and the Twilio realtime audio pacer that this PR extends for Telnyx. (role: adjacent realtime voice contributor; confidence: medium; commits: 79dd65e20889, 309ff6bada57, 7fc9a82dca2f; files: extensions/voice-call/src/webhook/realtime-handler.ts, extensions/voice-call/src/webhook/realtime-audio-pacer.ts)

Remaining risk / open question:

• No after-fix real Telnyx call/WebSocket/audio proof is attached; the PR body only lists local validation commands.
• The current diff appears to leave Telnyx outbound audio on the Twilio frame branch because token metadata is discarded before callerMeta.provider is read.

Codex review notes: model gpt-5.5, reasoning high; reviewed against 2d1f4f909ed6.