# Takeover review record

PR: [#24682](https://git.cafe/pingdotgg/t3code/pulls/24682)
Reviewed integrated head: [accb7e7519](https://git.cafe/pingdotgg/t3code/commit/accb7e75199340d332c6086502023cb468bf2c47)
Base: [68d5b7ac73](https://git.cafe/pingdotgg/t3code/commit/68d5b7ac735a5e95a945084430c6b5925873cc82)

Round 1 had two independent, fresh, read-only reviewers. Neither received the other's findings. Both used pr-audit on the complete diff against main.

| Reviewer | Model / harness | Result | Focused validation |
|---|---|---|---|
| A | gpt-6.1-sol / Codex | MERGE; no concrete bugs or regressions | 150 tests across four files passed; diff whitespace clean |
| B | claude-opus-5-5 / Claude Agent | MERGE; no blocking findings | 56 mobile + 94 server tests passed |

Both traced collapse/expansion, queued cancellation and replacement sharing, Android canonical viewport indices, iOS full-array layout, credential fingerprints, cursor/commit identity, and in-flight epoch/TTL behavior. No weakening of the credential-keyed membership cache was found. No wire changes.

Reviewer B noted that membership keys omit updatedAt as before; an older same-credential read can replace newer membership within the pre-existing 60-second staleness window. This was not introduced as a new cache identity and was not considered blocking.

Remaining proof limits: Android requires a rebuilt native binary; Java, Gradle, SDK, adb and emulator are unavailable on fs-15, and iOS is unavailable. Neither reviewer launched a native client. Historical iOS media are not current-SHA Android proof. Current server runtime counters were still pending at review time.

Reviewer B requested running the existing Kotlin viewport tests on a prepared host, not adding tests. Additional matrix permutations for unchanged page ordering, reverse commit direction and exact TTL comparison were not requested.

Models: tests and implementation claude-opus-5-5 / Claude Agent; reviewers gpt-6.1-sol / Codex and claude-opus-5-5 / Claude Agent; evidence and proof audit gpt-6.1-sol / Codex.

Friction: missing native toolchain; older-revision evidence; guessed Android source path; WebFetch DNS failed for matrix URL while curl succeeded. These did not change the reviewed diff.