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Toshikatsu Oga

30-year carpenter → AI engineer. Built HORIZON SHIELD: tamper-proof AI for construction cost estimation in Japan.

Joined Joined on  Personal website https://shield.the-horizons-innovation.com/verify-directory/#check github website
58 green tests, one stranger: how an outside witness found a false field in our A2A responses
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58 green tests, one stranger: how an outside witness found a false field in our A2A responses

#ai #agents #a2a #testing
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4 min read
Who verifies "amazing"?
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Who verifies "amazing"?

#ai #mcp #opensource #architecture
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3 min read
Give your AI agent a record it did not write (ten minutes)
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Give your AI agent a record it did not write (ten minutes)

#mcp #ai #opensource #security
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5 min read
Same bytes, two verdicts. The only thing I changed was who I said I was.
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Same bytes, two verdicts. The only thing I changed was who I said I was.

#showdev #mcp #python #api
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7 min read
Two witnesses disagreed about my server. Both were right.
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Two witnesses disagreed about my server. Both were right.

#observability #bitcoin #mcp #cloudflarechallenge
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4 min read
How I built a tamper-proof AI for construction quotes after 30 years as a carpenter
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How I built a tamper-proof AI for construction quotes after 30 years as a carpenter

#showdev #ai #architecture #career
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3 min read
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