Repair path for #64734:

• Preserve @hanamizuki's contributor branch and commits.
• Rebase onto current main only if the executor finds drift.
• Verify the Discord thread-title budget is 4096 by default, clamps to the selected model output cap, and uses a 60s timeout for the fire-and-forget rename path.
• Rerun Codex /review and address every finding.
• Run pnpm -s vitest run extensions/discord/src/monitor/thread-title.generate.test.ts and pnpm check:changed before merge.

Clownfish 🐠 replacement reef notes:

• Cluster: ghcrawl-156886-autonomous-smoke
• Source PRs: fix(discord): raise thread title timeout and tokens to fit reasoning models #64734
• Credit: Preserve @hanamizuki as the source contributor for fix(discord): raise thread title timeout and tokens to fit reasoning models #64734.; Keep the existing changelog credit to @hanamizuki and verify it still lands cleanly after any rebase.; fix(discord): raise thread title max tokens for reasoning models #64172 is prior merged context from @hanamizuki and should remain credited as context, not replaced.
• Validation: pnpm -s vitest run extensions/discord/src/monitor/thread-title.generate.test.ts; pnpm check:changed
• Repair fallback: source PR fix(discord): raise thread title timeout and tokens to fit reasoning models #64734 is a fork branch requiring rebase; use replacement branch because GitHub App pushes to contributor forks can be rejected when rebased upstream history includes workflow files

fish notes: model gpt-5.5, reasoning xhigh; reviewed against b7f3f5a.