[agents doc] notes on when to create new blocksets for checkpoint variant#14208
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Contributors keep handling checkpoint variants (distilled/turbo) with a ConfigSpec flag and an if-branch inside a shared block — the standard-pipeline mindset ported into modular. The doc never said what to do instead: nothing routed on 'behavior differs per checkpoint', and flux2-klein was only cited as a flatness example, not as the variant pattern it embodies. Adds: - a per-checkpoint branch in the block types decision tree - 'Key pattern: Checkpoint variants' — separate assembly when the variant changes the contract (inputs/components/blocks), ConfigSpec only when it changes a value; flux2-klein as reference; the config-flag anti-pattern - gotcha #9 for the if-components.config.<variant_flag> smell Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…pos) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…ponents/config, never inputs) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The config-flag branch is what standard pipelines are forced into; modular's pitch is that the loaded pipeline describes exactly its checkpoint. Lead with the payoff (clean per-variant contract, automatic routing, input-surface expressiveness) and present the flag branch as tolerable-but-lossy rather than forbidden. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…ckset unless literally the same Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…alize only by removing branches/duplicates Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
sayakpaul
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Jul 17, 2026
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Thanks. Nothing major from my end.
stevhliu
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Jul 17, 2026
… flux2 growth example Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Keeping seeing modular PRs not creating separate blocksets for distilled checkpoints, so adding notes on this
#14083
#14177