fix(routing): strip unsupported params when routing to Haiku#8
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vadymc wants to merge 1 commit intoRelayPlane:mainfrom
Open
fix(routing): strip unsupported params when routing to Haiku#8vadymc wants to merge 1 commit intoRelayPlane:mainfrom
vadymc wants to merge 1 commit intoRelayPlane:mainfrom
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Requests originating from Opus (with 1M context, effort, thinking)
were failing with 400 errors when the proxy routed them to Haiku.
Three issues fixed:
- context-1m beta header: only stripped for Sonnet, now stripped for
all non-Opus models (Haiku rejects it too)
- output_config.effort: Claude Code sends {"effort":"high"} inside
output_config which Haiku does not support. Strip it in both native
and cascade handlers.
- cascade handler: was passing raw ctx (with context-1m) instead of
stripped ctx to forwardNativeAnthropicRequest. Also uses copy-on-write
for output_config so cascade escalation to Sonnet/Opus retains effort.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
context-1mbeta header: was only stripped for Sonnet; now stripped for all non-Opus models. Haiku rejects it withThe long context beta is not yet available for this subscription.output_config.effort: Claude Code sends{"effort":"high"}insideoutput_configwhich Haiku does not support, causingThis model does not support the effort parameter. Stripped in both native and cascade handlers.ctx: was forwarding the unstripped context (withcontext-1mbeta) toforwardNativeAnthropicRequest. Now constructs a per-attemptcascadeCtxwith the beta stripped.output_configis a shared nested object across cascade attempts. Uses copy-on-write (destructuring) instead ofdeleteso cascade escalation from Haiku → Sonnet/Opus retains theeffortparam.Test plan
strip-unsupported-params.test.ts(17 total, all passing)output_config.effortwas the actual field causing the 400 error🤖 Generated with Claude Code