{"slug":"what-is-a2a","verification":{"valid":true,"entries":7,"head":"135899586fff26d8ac7bc856f0f27a6189fc3b9982221de73e4770e0bca3ed17"},"energy":{"passes":7,"tokens_in":0,"tokens_out":0,"tokens_total":0,"cost_usd":0,"models":{"cap:cap_e977bc9c49319139":1,"claude-fable-5":6},"head":"135899586fff26d8ac7bc856f0f27a6189fc3b9982221de73e4770e0bca3ed17"},"provenance":[{"ts":"2026-07-24T16:10:36.078Z","model":"cap:cap_e977bc9c49319139","action":"voxel_batch_document_new","prompt":"","input":"what-is-a2a","response":"15 DIVs from document (verbatim, roundtrip-checked)","tokens_in":0,"tokens_out":0,"cost":0,"prev":"genesis","hash":"2a1db0b6650354b3170c61e0f5fbd34c64111b84911a8ecab28768ca0573154b"},{"ts":"2026-07-24T16:11:59.296Z","model":"claude-fable-5","action":"sources","prompt":"","input":"what-is-a2a","response":"1 source(s) added","tokens_in":0,"tokens_out":0,"cost":0,"prev":"2a1db0b6650354b3170c61e0f5fbd34c64111b84911a8ecab28768ca0573154b","hash":"d135d46097e27197b1da493c3811599001dd2f2ab0d2448e633b365ab169c655"},{"ts":"2026-07-24T16:11:59.914Z","model":"claude-fable-5","action":"sources","prompt":"","input":"what-is-a2a","response":"1 source(s) added","tokens_in":0,"tokens_out":0,"cost":0,"prev":"d135d46097e27197b1da493c3811599001dd2f2ab0d2448e633b365ab169c655","hash":"7c7a20b3d01be321bfab2b803600bfae3e8e5a3d7863b532d691f7647683a8cf"},{"ts":"2026-07-24T16:12:01.407Z","model":"claude-fable-5","action":"claim","prompt":"","input":"what-is-a2a c1","response":"A2A is an open Linux Foundation protocol (contributed by Google, Apache 2.0, 25k stars) enabling communication between opaque agentic applications over JSON-RPC 2.0/HTTPS.","tokens_in":0,"tokens_out":0,"cost":0,"prev":"7c7a20b3d01be321bfab2b803600bfae3e8e5a3d7863b532d691f7647683a8cf","hash":"4c334f217d39682614a58ca7034a7261729ac29b38d077893ce1f00c27976943"},{"ts":"2026-07-24T16:12:01.816Z","model":"claude-fable-5","action":"claim","prompt":"","input":"what-is-a2a c2","response":"Discovery works through agent cards: published structured descriptions of an agent's capabilities and connection details, read without exposing internals.","tokens_in":0,"tokens_out":0,"cost":0,"prev":"4c334f217d39682614a58ca7034a7261729ac29b38d077893ce1f00c27976943","hash":"bf2b4b52cefca527b012415ce5ec865064dab6efa2fcc1e352630967fdf35cf1"},{"ts":"2026-07-24T16:12:02.244Z","model":"claude-fable-5","action":"claim","prompt":"","input":"what-is-a2a c3","response":"By April 9, 2026 A2A had 150+ supporting organizations and production deployments on all three hyperscalers.","tokens_in":0,"tokens_out":0,"cost":0,"prev":"bf2b4b52cefca527b012415ce5ec865064dab6efa2fcc1e352630967fdf35cf1","hash":"fc88b4635ef1f8c8c0ba2f4802e4cce7ac4b2772dadc53df6c43cc394b9ac6ca"},{"ts":"2026-07-24T16:12:02.634Z","model":"claude-fable-5","action":"claim","prompt":"","input":"what-is-a2a c4","response":"A2A covers coordination across organizational boundaries while MCP covers tool connection; neither constrains how much authority travels with a delegated task beyond transport auth. First half documentary, second half analytical.","tokens_in":0,"tokens_out":0,"cost":0,"prev":"fc88b4635ef1f8c8c0ba2f4802e4cce7ac4b2772dadc53df6c43cc394b9ac6ca","hash":"135899586fff26d8ac7bc856f0f27a6189fc3b9982221de73e4770e0bca3ed17"}]}