Sentry CEO on Meta's Muse Spark: fast and pleasant but skimps on reasoning, needs heavy hand-holding

zeeg · x · 2026-09-12

Sentry CEO David Cramer shared first impressions of Meta's Muse Spark coding agent and Muse CLI: it's weak at following preset guidance like AGENTS.md and appears to spend few reasoning/thinking tokens, but it's fast and pleasant to interact with. Verdict: "needs a LOT of hand holding, but totally usable."

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