feat: Add cache headers logic to the agent card handler#435
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bartek-gralewicz merged 2 commits intoApr 29, 2026
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This pull request implements HTTP caching for the agentCardHandler in Express, introducing ETag generation and Cache-Control header support. It also includes a new test suite to verify caching behavior and conditional request handling. The review feedback suggests using the idiomatic req.fresh property in Express to handle conditional requests more robustly and in full compliance with the HTTP specification.
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Apr 28, 2026
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🤖 I have created a release *beep* *boop* --- ## 1.0.0-alpha.0 (2026-05-11) See the [v0.3 -> v1.0-alpha.0 migration guide](https://github.com/a2aproject/a2a-js/blob/v1.0.0-alpha.0/docs/migration-guide.md). **Note**: Enabling backward compatibility with v0.3 is tracked in [#452](#452). ### ⚠ BREAKING CHANGES * Drop support for node 18 ([#368](#368)) * Make ServerCallContext parameter mandatory across all places ([#405](#405)) * Remove JSON-RPC client ([#353](#353)) * Remove transport-specific exports ([#404](#404)) * Update codebase to use A2A 1.0.0 data model ([#375](#375)) * Remove A2AExpressApp ([#363](#363)) ### Features * Add A2A Version Header ([#422](#422)) ([b5f3db7](b5f3db7)) * Add cache-headers logic to the agent card handler ([#435](#435)) ([955b52b](955b52b)) * Add resource scoping ([#450](#450)) ([c527086](c527086)) * Add support for custom authentication scheme and credentials in auth-headers ([#430](#430)) ([5a4389b](5a4389b)) * AgentCardSignature support ([#448](#448)) ([4a41a8c](4a41a8c)) * Enforce events ordering ([#437](#437)) ([157cf48](157cf48)) * Enriched Error Model ([#427](#427)) ([c130778](c130778)) * Implement listTasks method ([#383](#383)) ([7d4c472](7d4c472)) * Send current task as the first event after subscribing to it ([#418](#418)) ([4bfcf5f](4bfcf5f)) * Support multi-tenancy ([#419](#419)) ([1877877](1877877)) ### Code Refactoring * remove A2AExpressApp ([#363](#363)) ([0b84728](0b84728)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). --------- Co-authored-by: bartek-gralewicz <bgralewicz@google.com> Co-authored-by: Ivan Shymko <ishymko@google.com>
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Description
Added cache headers logic to the agent card handler. These changes reflect the spec section 8.6.