ZeroNoise Logo zeronoise
Post
Coding Agents Alpha Tracker
Opus 5.5 Clears a Stalled Port; the Assembly Speedup Has a Narrow Benchmark
•
4 min read
• 202 docs
Two practitioners report Opus 5.5 completing major language translations, while the linked `ttfx` PR gives a testable, decrypt-specific speed result rather than a general coding benchmark. The brief pairs that signal with concrete practices for scoping long runs, verifying agents, and evaluating new developer tools.

🔥 TOP SIGNAL

Long-horizon code translation is the strongest signal. Theo says Opus 5.5 got his four-month, on-and-off TypeScript-compiler-to-Rust port working in 10 hours, after GPT-5.6 Sol and GPT-6 Astra plateaued at roughly 35% and 85% of tests passing. DHH separately says Opus 5.5 translated Omarchy’s ttfx from Rust to x86-64 assembly and claims up to 17× faster. The linked PR reports 14.5× on one decrypt test (371→25.5 ms) and separately lists 32.5 ms versus Rust’s 371 ms, with 206/206 oracle cases matching—strong project-specific evidence, not a general coding benchmark.

⚡ TRY THIS

  • Give long runs a finish line and a quality target. Theo’s exact request: /goal finish the port and make it faster. Peter Steinberger used /goal with Astra to move OpenClaw off synchronous SQLite after it became limiting with one agent running 50 sessions in parallel; he reports 575 PRs landed so far, with improvements shipped along the way.

  • Make review adversarial and isolated. Steinberger’s auto-review skill starts a fresh-context reviewer, feeds its findings back to the writer, and repeats; then the agent gets a separate test box to install the app, inspect the UI, and verify it end to end. He says this can turn a 10-minute PR into two hours, but lets him parallelize about 20 tasks—reserve the extra validation for changes where it pays back.

  • Turn Slack bug reports into repro-to-PR jobs. Boris Cherny says Claude Tag writes more than 50% of his PRs each day; his prompt is: “@Claude from now on, attempt to repro every bug in this channel end to end, running the full app. Once you reproduce the bug, put up a PR to fix it and tag the right team for code review.” Claude Tag’s personal connectors are rolling out on Team plans, with Enterprise to follow; those personal connectors are for user-requested work, not scheduled or agent-started runs, which require connectors attached to the channel.

  • Write the HLDD after the implementation works. Geoffrey Huntley’s pattern: use pre-commit hooks and agent skills to keep the high-level design doc updated, then self-host it in the product. Put the human-authored rationale and success measures first, implementation details below, and editor remarks where a subsection needs its intent preserved.

📡 WHAT SHIPPED

  • Antigravity 2.0 adds /plan in the app and CLI. The workflow explores files and dependencies without writing code, asks clarifying questions, then produces a reviewable plan with verification checkpoints. Review or adjust it and click Proceed; the docs say whether the agent pauses for approval is configurable through the artifact review policy, so set that explicitly if you need a hard gate.

  • Microsoft Copilot Code is an app builder, not the new default coding IDE. It turns natural-language requests into dashboards, automations, and internal apps in a sandbox that can be hosted in a tenant. Frontier rollout is slated for month-end, Managed Runtime is already in preview, and Microsoft says developers will keep using GitHub Copilot for day-to-day work.

  • Autopilot is a separate persistent agent. Microsoft describes a cloud-hosted agent that watches channels, follows up, handles recurring work, and can resume projects days later; its blog says private-preview expansion is at month-end. Omar Shahine says it is built on OpenClaw, whose team worked with Microsoft on deployment readiness; local inference, file transfer, and code mode on machines connected to the OpenClaw gateway are still described as upcoming.

  • Cua Driver is now stable and open source for Omarchy. TryCua says its native synthetic cursor for Hyprland enables OS-level multi-cursor control. The repo shows two sessions operating Calc and Inkscape on Omarchy and supports agent connections through CLI, MCP, or typed SDKs.

  • OpenRouter introduced typesafe/jev-router, a cache-aware model-and-reasoning-effort selector. Theo’s objection is coding-specific: Jev categorizes but cannot see the codebase or the agent’s tools, so prompt-only complexity estimates may miss the work involved. He also doubts mid-task downgrades save much when cache writes are a large cost, and says he is still gathering numbers; his early comparison to a “DeepSeek 4.1 Flash router” is only an impression.

🎬 GO DEEPER

  • PR — Omarchy ttfx Rust-to-assembly port: Inspect how Rust remains the front end and fallback for unported effects, while the assembly engine is checked against byte-for-byte oracle cases.

  • Repo — Cua Driver: The quickstart connects an agent to Calculator, asks it to compute 6 × 7, and checks that the app displays 42; the repo also documents CLI, MCP, and SDK integrations.

Editorial take: The edge is not simply “let it run”: specify the finish line, then give an independent reviewer and a real execution environment a chance to falsify the result.

Want personalized briefs on the topics you care about?

Create your own agent and get daily or weekly cited briefs on the topics you care about, shaped by the people, newsletters, podcasts, blogs, and channels you choose.