PR 27273 live runtime verification
main: 0ed7b7252e
PR: be465c1512ced1dca3c5ea13b959ea0e13193cad
client: repository Playwright 1.60.0 + /usr/bin/google-chrome on Linux
provider: Codex gpt-6.1-sol through local proxy
project: /home/user/emoji-verification (real git repo)
project, thread, and provider turns created through the web UI. no mocked or seeded messages.
main server stopped before PR server startup. isolated dev data copied after stop to preserve identical message.

live HTTP MCP t3_thread_read request:
{threadId, view:"activity", itemId:realAssistantMessage, maxCharsPerItem:budget, textOffset:nextTextOffset}

main:
budget 2
{"text":"a\ud83d","nextTextOffset":2,"textTruncated":true,"wellFormed":false}
{"text":"\ude00b","nextTextOffset":4,"textTruncated":true,"wellFormed":false}
{"text":"c","nextTextOffset":null,"textTruncated":false,"wellFormed":true}
reconstructed "a😀bc"
budget 1
{"text":"a","nextTextOffset":1,"textTruncated":true,"wellFormed":true}
{"text":"\ud83d","nextTextOffset":2,"textTruncated":true,"wellFormed":false}
{"text":"\ude00","nextTextOffset":3,"textTruncated":true,"wellFormed":false}
{"text":"b","nextTextOffset":4,"textTruncated":true,"wellFormed":true}
{"text":"c","nextTextOffset":null,"textTruncated":false,"wellFormed":true}
reconstructed "a😀bc"
budget 5
{"text":"a😀bc","nextTextOffset":null,"textTruncated":false,"wellFormed":true}
reconstructed "a😀bc"

pr:
budget 2
{"text":"a","nextTextOffset":1,"textTruncated":true,"wellFormed":true}
{"text":"😀","nextTextOffset":3,"textTruncated":true,"wellFormed":true}
{"text":"bc","nextTextOffset":null,"textTruncated":false,"wellFormed":true}
reconstructed "a😀bc"
budget 1
{"text":"a","nextTextOffset":1,"textTruncated":true,"wellFormed":true}
{"text":"😀","nextTextOffset":3,"textTruncated":true,"wellFormed":true}
{"text":"b","nextTextOffset":4,"textTruncated":true,"wellFormed":true}
{"text":"c","nextTextOffset":null,"textTruncated":false,"wellFormed":true}
reconstructed "a😀bc"
budget 5
{"text":"a😀bc","nextTextOffset":null,"textTruncated":false,"wellFormed":true}
reconstructed "a😀bc"

neighboring reads:
{
  "original": "Reply with exactly a😀bc and nothing else. Do not use tools.",
  "reconstructed": "Reply with exactly a😀bc and nothing else. Do not use tools.",
  "allPagesWellFormed": true,
  "messagesViewContainsOriginal": true,
  "messagePaginationStable": true
}

real Codex MCP calls (from persisted provider timeline):
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":0,"maxCharsPerItem":2},"items":[{"type":"assistant_message","text":"a","textTruncated":true,"nextTextOffset":1}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":1,"maxCharsPerItem":2},"items":[{"type":"assistant_message","text":"😀","textTruncated":true,"nextTextOffset":3}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":3,"maxCharsPerItem":2},"items":[{"type":"assistant_message","text":"bc","textTruncated":false,"nextTextOffset":null}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":0,"maxCharsPerItem":1},"items":[{"type":"assistant_message","text":"a","textTruncated":true,"nextTextOffset":1}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":1,"maxCharsPerItem":1},"items":[{"type":"assistant_message","text":"😀","textTruncated":true,"nextTextOffset":3}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":3,"maxCharsPerItem":1},"items":[{"type":"assistant_message","text":"b","textTruncated":true,"nextTextOffset":4}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":4,"maxCharsPerItem":1},"items":[{"type":"assistant_message","text":"c","textTruncated":false,"nextTextOffset":null}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786","view":"activity","limit":100,"itemId":"turn-item:provider:codex:native-item:msg_0c750ea16a12fef0016ae6a31f11188197910c5dbcb4782998","textOffset":0,"maxCharsPerItem":5},"items":[{"type":"assistant_message","text":"a😀bc","textTruncated":false,"nextTextOffset":null}]}
{"toolName":"t3-code.t3_thread_read","input":{"threadId":"thread:delegated-task:command%3Amcp%3A17124e79-6a52-4db6-b246-6d15dfef07bc%3Adelegate-task%3A3ae738fc-876b-4f58-bb33-057cebb39955","maxCharsPerItem":1,"limit":100},"items":[{"type":"user_message","text":"R","textTruncated":true,"nextTextOffset":1},{"type":"assistant_message","text":"😀","textTruncated":false,"nextTextOffset":null}]}

read-only persistence evidence:
{"sequence":171,"event":"subagent.updated","at":"2026-11-01T02:27:33.751Z","commandId":null,"result":"😀","delivery":{"state":"claimed","observedByRunId":null}}
{"sequence":178,"event":"subagent.updated","at":"2026-11-01T02:27:33.825Z","commandId":"command:mailbox-accepted:effect:command:fixture:delegated-completion:dispatch:60ad23bb-36d3-45fd-8c08-8f1199f8162d:provider-turn.steer:provider-turn:provider:codex:native-turn:01a194ee-9939-7f52-87b5-d9b293410d58","result":"😀","delivery":{"state":"delivered","observedByRunId":null}}
{"sequence":189,"event":"subagent.updated","at":"2026-11-01T02:27:39.458Z","commandId":"command:mcp:17124e79-6a52-4db6-b246-6d15dfef07bc:thread-read-acknowledge:ae5d4f9f-2ba0-4e3e-bf55-073104c869ef","result":"😀","delivery":{"state":"acknowledged","observedByRunId":"run:thread:f3fcfbcc-6fc9-45f9-8a80-66af0fb2c786:ordinal:2"}}

blacksmith: vp i && vp test run apps/server/src/mcp/OrchestratorMcpService.activity.test.ts apps/server/src/mcp/OrchestratorMcpToolkit.integration.test.ts
2 files passed; 7 tests passed.
GitHub CI: all 29 reported checks pass or skip; no failure.
unverified: native desktop/mobile, other providers, remote relay/tunnel.