PR: https://git.cafe/pingdotgg/t3code/pulls/28418
GitHub: https://github.com/pingdotgg/t3code/pull/28418
main: cbb0417df5 (github/main, separate /home/user/main worktree)
PR head: 23c710a5f11a8d7127de375f262722066f873492 (exact contributor head)
Runtime: Linux, real dev server, Chromium /usr/bin/google-chrome via repo Playwright
Provider: Codex gpt-6.1-sol, low effort, real local proxy

Scenario created through the web composer and real Codex tools:
1. timeout 30 node -e 'const fs=require("fs");fs.mkdirSync("transport-readonly",{recursive:true});fs.writeFileSync("transport-readonly/corpus.txt",("a".repeat(96)+"漢").repeat(500));fs.chmodSync("transport-readonly",0o555)'
2. Native apply_patch: *** Delete File: transport-readonly/corpus.txt
3. Actual deletion fails with directory permission denied; real provider emits fileChange status failed with the file content as diff.
4. timeout 30 chmod 755 transport-readonly
5. Expand work log, expand failed file row, scroll actual preformatted diff to bottom.

Matched source content: 49,500 UTF-8 bytes, (96 ASCII a + one 漢) repeated 500 times.
main live websocket turn-item.updated failed file_change diffStr:
  bytes = 32803
  suffix = "aaaaaaaaaaaaaaaaaaaa\n\n\n… output truncated for transport"
main expanded web UI, live and reload:
  bytes = 32803; three newlines before marker (two empty lines)
PR live websocket turn-item.updated failed file_change diffStr:
  bytes = 32768
  suffix = "aaaaaaaaaaaaaaaaaaaaaa\n… output truncated for transport"
PR expanded web UI after reload:
  bytes = 32768; one newline before marker (no empty line)
PR authenticated websocket orchestration.subscribeThread afterSequence=240:
  replayed event sequence 286: bytes = 32768, identical one-newline suffix

Neighboring behavior through the same web client and real Codex provider:
- main short reply SHORT_OK completed and survived reload.
- PR native apply_patch added transport-neighbor.txt as BEFORE_OK, then changed it to AFTER_OK.
- Codex ran timeout 30 cat transport-neighbor.txt; actual file read AFTER_OK.
- PR final SHORT_OK rendered live and survived reload.
- successful large deletion worked before the permission-denied scenario.

Focused checks on exact PR head via blacksmith-check (remote, no local tests):
  vp i
  vp test run apps/server/src/orchestration-v2/WireProjection.test.ts apps/server/src/ws.test.ts
  2 files passed; 26 tests passed (17 wire projection, 9 websocket).
GitHub latest-head CI: all reported required jobs passed; optional jobs skipped.
No source changes or pushes were needed.

Limits:
- Native subagent turn-item prompt was empty with the current Codex protocol, so long subagent truncation could not be proved through that path.
- A pure 12,000-Han native spawn prompt was stopped after about 8 minutes without a tool event; a cheaper ASCII attempt completed but shortened the prompt.
- Native mobile, Electron desktop, macOS/Windows, relay/tunnel and performance claims were not exercised.