v1.7.0 shipped on 2026-07-27, so the pin moves off v1.7.0-pre.3.
Removes mcp-client-go.exe and weather-server-go/weather.exe, which were
committed by accident in the previous commit — 14MB of build output that
should never have been in the tree. The tests branch adds the ignore rules
that keep them out.
Also from review: the server README claimed both tools set an OutputSchema.
Only get_alerts does; get_forecast relies on inference from the handler
return type, which is the idiomatic spelling and worth saying so.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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>
