real dev verification of github PR 29268
main: a036489016, isolated /home/user/main/.t3
pr head before fix: 501daf46365b67b2e976268f3d1083b14340fae4
client: repo Playwright 1.60.0, /usr/bin/google-chrome, Linux
provider: Codex gpt-6.1-sol through configured local proxy
app-created git workspace: /home/user/main/apps/server
11 idle threads created through create_threads, long response generated by Codex

main real MCP tool calls:
t3_thread_list({}): 12 threads, total12, nextCursor null
t3_thread_read({view:activity}): 28 items, longest 20000 chars, hasMore false

pr real MCP calls and independently checked comparisons:
{
  "list": {
    "first": {
      "count": 10,
      "total": 12,
      "nextCursor": 10
    },
    "second": {
      "count": 2,
      "total": 12,
      "nextCursor": null
    },
    "full": {
      "count": 12,
      "total": 12,
      "nextCursor": null
    },
    "idsEqual": true
  },
  "tips": {
    "chunks": [
      {
        "textOffset": 0,
        "length": 500,
        "nextTextOffset": 500,
        "textTruncated": true
      },
      {
        "textOffset": 500,
        "length": 500,
        "nextTextOffset": 1000,
        "textTruncated": true
      },
      {
        "textOffset": 1000,
        "length": 500,
        "nextTextOffset": 1500,
        "textTruncated": true
      },
      {
        "textOffset": 1500,
        "length": 495,
        "nextTextOffset": null,
        "textTruncated": false
      }
    ],
    "concatenatedLength": 1995,
    "fullLength": 1995,
    "equal": true
  },
  "activity": {
    "first": {
      "count": 10,
      "hasMore": true,
      "nextPosition": 9
    },
    "second": {
      "count": 10,
      "hasMore": true,
      "nextPosition": 19
    },
    "full": {
      "count": 66,
      "hasMore": false,
      "nextPosition": 65,
      "longestText": 20000
    },
    "pageIdsMatchFullPrefix": true,
    "pageTextPrefixesEqual": true,
    "tipsEqual": true
  }
}
CLI: node apps/server/src/bin.ts thread show --base-dir /home/user/t3code/.t3 --json --messages 100 <thread-id>
full 1995-character assistant message preserved: true

regression on original PR:
real Codex child final answer: 2571 chars
parent read chunks:500,500,500,500,500,71; final nextTextOffset:null
read-only SQLite query after completion: {"readCount":6,"rows":[{"status":"completed","completion_delivery_state":"delivered"}]}
control explicit maxCharsPerItem:20000 read acknowledged the same child

fix reverified after server restart:
new real Codex child final answer: 1529 chars
chunks: [{"offset":0,"length":500,"nextTextOffset":500},{"offset":500,"length":500,"nextTextOffset":1000},{"offset":1000,"length":500,"nextTextOffset":1500},{"offset":1500,"length":29,"nextTextOffset":null}]
no task_status/task_wait or explicit full read
read-only query SELECT status,completion_delivery_state FROM orchestration_v2_projection_subagents WHERE subagent_id=<task-id>
{"status":"completed","completion_delivery_state":"acknowledged"}
{
  "list": {
    "count": 10,
    "total": 14,
    "nextCursor": 10
  },
  "activity": {
    "count": 10,
    "hasMore": true,
    "nextPosition": 9,
    "longestText": 500
  }
}

checks:
96 existing focused tests passed via blacksmith-check
new row in existing integration test failed before fix: expected acknowledged, received claimed
all 4 integration rows passed after fix, including emoji and out-of-range offset

not exercised: native desktop/mobile, other providers, linked environments/remote delegation runtime

final fix head: cf8578f4c2022643147d0bef944dc6ce7ee8bdac
normal push succeeded to contributor branch
vp run check:changed 47f2c8d29e981c7723467efe137ee19e91df924e through blacksmith-check: all passed (format,lint,knip,graphql,typechecks,101 tests)