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fix(compat): return -32602 for invalid v0.3 JSON-RPC params - #1419

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ConnorMoss02 wants to merge 1 commit into
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ConnorMoss02:fix/v03-jsonrpc-invalid-params
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ConnorMoss02 wants to merge 1 commit into
a2aproject:mainfrom
ConnorMoss02:fix/v03-jsonrpc-invalid-params

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@ConnorMoss02

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Problem

The v0.3 JSON-RPC adapter returned -32600 when params failed validation. v0.3.26 returned -32602 here.

Fix

Return InvalidParamsError instead of InvalidRequestError.

Tests

test_invalid_params_v03_compat fails on main. 2520 passed.

Fixes #1417

@ConnorMoss02
ConnorMoss02 requested a review from a team as a code owner November 3, 2026 16:27
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github-actions Bot commented Nov 3, 2026

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🧪 Code Coverage (vs main)

⬇️ Download Full Report

Base PR Delta
src/a2a/compat/v0_3/jsonrpc_adapter.py 68.22% 72.87% 🟢 +4.65%
Total 93.42% 93.48% 🟢 +0.06%

Generated by coverage-comment.yml

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v0.3 JSON-RPC returns -32600 instead of -32602 for invalid params

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