PR #25292 runtime verification

main: 32ecd71726 (github/main), separate /home/user/main worktree
head: 0ae33dd44379e32b98121d8301d3e33c13edb82b
One dev server at a time; main stopped before PR started.

Real app: project created through Add project > New project.
Codex gpt-6.1-sol created and committed notes.txt (BOM + unicode), data.bin (61 00 62), and a real PNG.
On PR: Add project > Local folder reopened the same repository.
Codex gpt-6.1-sol read unicode, inspected binary bytes, and opened PNG: second line é中🙂, bytes 61 00 62, dimensions 1 x 1. Follow-up read also passed.

Direct production helper diagnostics, using real files with NodeServices.layer and no mocked filesystem.
These bypass the server/provider transport and are NOT proof of a live Antigravity session.

$ timeout 30 node /tmp/pr25292-read.mjs /home/user/main
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/image.png"},"result":{"_id":"Result","_tag":"Success","value":{"content":"�PNG\r\n\u001a\n\u0000\u0000\u0000\rIHDR\u0000\u0000\u0000\u0001\u0000\u0000\u0000\u0001\b\u0004\u0000\u0000\u0000�\u001c\f\u0002\u0000\u0000\u0000\u000bIDATx�c��\u001f\u0000\u0003\u0003\u0002\u0000[\u0000\u0000\u0000\u0000IEND�B`�"}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/data.bin"},"result":{"_id":"Result","_tag":"Success","value":{"content":"a\u0000b"}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/notes.txt"},"result":{"_id":"Result","_tag":"Success","value":{"content":"first\né中🙂\nlast"}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/notes.txt","line":2,"limit":1},"result":{"_id":"Result","_tag":"Success","value":{"content":"é中🙂"}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/missing.txt"},"result":{"_id":"Result","_tag":"Failure","failure":{"_tag":"AcpRequestError","code":-32002,"errorMessage":"File '/home/user/main/.t3/projects/binary-read-verification/missing.txt' not found."}}}
{"request":{"sessionId":"diagnostic-only","path":"/etc/hostname"},"result":{"_id":"Result","_tag":"Failure","failure":{"_tag":"AcpRequestError","code":-32602,"errorMessage":"Path '/etc/hostname' is outside the session workspace."}}}

$ timeout 30 node /tmp/pr25292-read.mjs /home/user/t3code
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/image.png"},"result":{"_id":"Result","_tag":"Failure","failure":{"_tag":"AcpRequestError","code":-32602,"errorMessage":"File '/home/user/main/.t3/projects/binary-read-verification/image.png' is not a UTF-8 text file."}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/data.bin"},"result":{"_id":"Result","_tag":"Failure","failure":{"_tag":"AcpRequestError","code":-32602,"errorMessage":"File '/home/user/main/.t3/projects/binary-read-verification/data.bin' contains binary data."}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/notes.txt"},"result":{"_id":"Result","_tag":"Success","value":{"content":"first\né中🙂\nlast"}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/notes.txt","line":2,"limit":1},"result":{"_id":"Result","_tag":"Success","value":{"content":"é中🙂"}}}
{"request":{"sessionId":"diagnostic-only","path":"/home/user/main/.t3/projects/binary-read-verification/missing.txt"},"result":{"_id":"Result","_tag":"Failure","failure":{"_tag":"AcpRequestError","code":-32002,"errorMessage":"File '/home/user/main/.t3/projects/binary-read-verification/missing.txt' not found."}}}
{"request":{"sessionId":"diagnostic-only","path":"/etc/hostname"},"result":{"_id":"Result","_tag":"Failure","failure":{"_tag":"AcpRequestError","code":-32602,"errorMessage":"Path '/etc/hostname' is outside the session workspace."}}}

Blacksmith: 44 tests passed in AntigravityAdapterV2.test.ts and AntigravityAcpSupport.test.ts.
Blacksmith: vp run check:changed passed format, lint, knip, graphql, 3 package typechecks, 11 tests.
Initial worker lacked origin/main; fetched PR base and head history, then reran successfully.
GitCafe head CI: 29 successful, 0 failing, 0 pending.

NOT VERIFIED: live Antigravity client_view_file > fs/read_text_file exchange on either revision. Installed real Antigravity 1.4.1 from app and started Sign in; app requires Google account authorization and VM has no Google credentials. Codex uses a different read path. No claim of end-to-end verification for this fix. Native desktop/mobile and Google runtime media delivery unverified.
No source changes or pushes.