JK Easy KSampler (Context)

This is a KSampler that gets almost everything it needs from one bundled wire instead of five or six separate inputs. Feed it a JK_CONTEXT - built with JKLilContext or JKBigContext - and it pulls model, positive, negative, and the working latent from there, leaving you to set only the sampling-specific knobs directly on this node.

The extra thing this node does that a stock KSampler doesn't: A1111-style seed variation. If you've used the "Variation seed" and "Variation strength" fields in A1111's extras, this is that feature, ported over as widgets.

The inputs and outputs that matter

• ctx (JK_CONTEXT) - required, supplies model, conditioning, and latent from upstream.
• denoise (default 1, full strength) - how much of the input latent gets overwritten. Leave at 1 for a first pass from empty latent; lower it if you're refining an existing image.
• noise_mode (GPU(=A1111) / CPU) - which noise generation path to use. GPU-generated noise is what A1111 defaults to and doesn't reproduce identically under ComfyUI's own default (CPU) noise; this toggle exists to get you closer to an A1111-style result on the same seed.
• variation_seed and variation_strength (default 0, meaning off) - a second seed you blend into the main one. At variation_strength above 0, the output becomes a mix of what your main seed would produce and what variation_seed would produce, weighted by that strength. This is the standard way to nudge a good image slightly without a full reroll - push it up gradually and you get a family of related variations rather than a completely different image.
• Optional variation_method (linear / slerp) - how the two seeds' noise gets blended. Linear is a straightforward interpolation; slerp (spherical linear interpolation) blends along the noise's natural geometry and tends to be the better-behaved choice for noise blending specifically, which is why tools that offer both usually default people toward slerp for this kind of use.
• Optional bleh_sampler_override - a hook into the separate ComfyUI-bleh pack's sampler presets; leave on disabled unless you've set those up.

Two outputs: LATENT (the sampled result - decode it normally) and JK_CONTEXT, the context passed back through, so you can chain straight into EasyHRFix_Context or another context-flavored node without rebuilding the bundle.

Installing it

Part of kostenickj/jk-comfyui-helpers, already present on comfy.icu, or cd ComfyUI/custom_nodes && git clone https://github.com/kostenickj/jk-comfyui-helpers.git and restart for a self-hosted install. This node's own functionality needs nothing beyond the pack - no extra model downloads. If you use bleh_sampler_override, that's the one place a separate pack (ComfyUI-bleh) comes into play, and only if you've configured presets in it. As with the rest of this pack, expect a thin README and no real community discussion to fall back on if something's unclear - it's a small personal toolkit, not a widely-adopted pack.

Common issues

• ctx missing a required field. If your upstream context builder didn't populate model, positive, negative, or latent, this node has nothing to sample with - check what actually made it into the context before it reaches here.
• Variation strength set but nothing visibly changes. At low strength the effect is genuinely subtle by design - that's the point, small nudges rather than reshuffles. Push it higher if you want a more obvious shift, or check variation_seed isn't accidentally the same as your main seed.
• Expecting steps/cfg/sampler/scheduler here. They're not on this node - they live in the context if you're using JKBigContext, or you're expected to have set them upstream. This node is deliberately narrow: sampling mechanics only.