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quickstart-resources/mcp-client-go/go.sum
olaservo 84ffd2d7d2 Add structured output to the Go weather server and client 
Both tools declare an OutputSchema and return StructuredContent alongside the
text.

get_alerts returns []Alert, so it answers with a top-level JSON array rather
than an array nested in an object, which protocol revision 2026-07-28 is the
first to allow. "No alerts" is simply []. get_forecast returns an object, for
contrast. The declared schema narrows the inferred ["null","array"] root to
"array": jsonschema-go infers the nullable form because a nil slice is valid
Go, but the handler always builds a slice.

Error paths return an error: a tool declaring an OutputSchema MUST return
conforming structured content, so a path with no data has to fail.

The client compiles every declared OutputSchema at connect time and validates
results against it, using jsonschema-go - already an SDK dependency, so no new
one. Each channel goes to its stated reader: Content is forwarded to the
model, StructuredContent is used as data, reporting how many items came back.

The client no longer treats a missing .env as fatal and checks for
ANTHROPIC_API_KEY after connecting rather than before, matching the Python and
TypeScript clients, so the connection can be exercised without credentials.

Requires go-sdk v1.7.0-pre.3: non-object output schema support (SEP-2106)
landed after v1.6.1 and is in no stable release. Model identifier moves to
claude-sonnet-5; the second call in the tool loop used a hardcoded
ModelClaude3_7SonnetLatest while the first used the package variable, so both
now use the same one.

Note that the SDK sends an array-rooted schema as written on every connection
rather than projecting it down, so an older client rejects the tool list.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-09 15:36:32 -07:00

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github.com/anthropics/anthropic-sdk-go v1.14.0/go.mod h1:WTz31rIUHUHqai2UslPpw5CwXrQP3geYBioRV4WOLvE=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/golang-jwt/jwt/v5 v5.3.1 h1:kYf81DTWFe7t+1VvL7eS+jKFVWaUnK9cB1qbwn63YCY=
github.com/golang-jwt/jwt/v5 v5.3.1/go.mod h1:fxCRLWMO43lRc8nhHWY6LGqRcf+1gQWArsqaEUEa5bE=
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github.com/google/jsonschema-go v0.4.3 h1:/DBOLZTfDow7pe2GmaJNhltueGTtDKICi8V8p+DQPd0=
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