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feat: add AWS PRM user-agent attribution for Bedrock calls #224

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feat: add AWS PRM user-agent attribution for Bedrock calls #224

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f83daa9
feat: add AWS PRM user-agent attribution for Bedrock calls
blink-so[bot] Mar 19, 2026
262727e
fix: use middleware to append APN user-agent instead of config.WithAppID
blink-so[bot] Mar 24, 2026
3e06c65
test: verify PRM user-agent attribution on Bedrock requests
blink-so[bot] Apr 6, 2026
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6 changes: 6 additions & 0 deletions intercept/messages/base.go
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Original file line number Diff line number Diff line change
Expand Up @@ -300,6 +300,12 @@ func (i *interceptionBase) withAWSBedrockOptions(ctx context.Context, cfg *aibco
}

var out []option.RequestOption
out = append(out, option.WithMiddleware(func(req *http.Request, next option.MiddlewareNext) (*http.Response, error) {
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@pawbana pawbana Apr 23, 2026

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If I understand correctly I think it could be simplified by using option.WithHeader:

if ua := req.Header.Get("User-Agent"); ua != "" {
    out = append(out, option.WithHeader(...)
}

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@DevelopmentCats DevelopmentCats Apr 23, 2026

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I think you may be right here I will make the update, and test to verify it appends the same way as I have verified already in bedrock.

if ua := req.Header.Get("User-Agent"); ua != "" {
req.Header.Set("User-Agent", ua+" sdk-ua-app-id/APN_1.1%2Fpc_cdfmjwn8i6u8l9fwz8h82e4w3%24")
}
return next(req)
}))
out = append(out, bedrock.WithConfig(awsCfg))

// If a custom base URL is set, override the default endpoint constructed by the bedrock middleware.
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12 changes: 12 additions & 0 deletions internal/integrationtest/bridge_test.go
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Expand Up @@ -118,6 +118,13 @@ func TestAnthropicMessages(t *testing.T) {
require.Len(t, promptUsages, 1)
assert.Equal(t, "read the foo file", promptUsages[0].Prompt)

// Verify PRM attribution is NOT present on non-Bedrock Anthropic requests.
received := upstream.receivedRequests()
require.Len(t, received, 1)
ua := received[0].Header.Get("User-Agent")
assert.NotContains(t, ua, "sdk-ua-app-id",
"PRM attribution should not be present on non-Bedrock requests")

bridgeServer.Recorder.VerifyAllInterceptionsEnded(t)
})
}
Expand Down Expand Up @@ -308,6 +315,11 @@ func TestAWSBedrockIntegration(t *testing.T) {
require.False(t, gjson.GetBytes(received[0].Body, "model").Exists(), "model should be stripped from body")
require.False(t, gjson.GetBytes(received[0].Body, "stream").Exists(), "stream should be stripped from body")

// Verify PRM attribution is appended to the User-Agent header.
ua := received[0].Header.Get("User-Agent")
require.Contains(t, ua, "sdk-ua-app-id/APN_1.1%2Fpc_cdfmjwn8i6u8l9fwz8h82e4w3%24",
"expected AWS PRM attribution in User-Agent header")

interceptions := bridgeServer.Recorder.RecordedInterceptions()
require.Len(t, interceptions, 1)
require.Equal(t, interceptions[0].Model, bedrockCfg.Model)
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