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todo/expert-panel-findings
fathom/internal/ingest/testdata/claude_code_traces.json
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zzg c37dff07b0 Add OTLP ingest and span/log correlation 
Decoders for OTLP/HTTP JSON traces and logs, tested against payloads
captured from a real `claude -p` run rather than hand-written fixtures.

Correlation is not a span_id join. Claude Code stamps every content log
record with the ROOT span's id, so joining on span_id piles the entire
transcript onto the root and leaves every interesting span empty -- it
fails while looking like it worked. Instead this joins on typed identity
keys both sides carry: tool_use_id for tool results, request_id for
model responses, falling back to innermost-containing-span by timestamp
for records with no key at all.

Identity attributes (user.email, user.id, account and org ids) are
dropped at ingest by default, before anything reaches disk, with an
opt-in to retain them.

Also handles base64 trace ids from SDKs that ignore the OTLP/JSON hex
mapping, nanosecond timestamps beyond float64's exact integer range,
and span cycles from trace id collisions.
2026-09-15 21:34:34 -07:00

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{
"resourceSpans": [
{
"resource": {
"attributes": [
{
"key": "service.name",
"value": {
"stringValue": "claude-code"
}
},
{
"key": "host.arch",
"value": {
"stringValue": "arm64"
}
},
{
"key": "os.type",
"value": {
"stringValue": "darwin"
}
},
{
"key": "os.version",
"value": {
"stringValue": "25.6.0"
}
},
{
"key": "service.version",
"value": {
"stringValue": "2.1.266"
}
}
],
"droppedAttributesCount": 0
},
"scopeSpans": [
{
"scope": {
"name": "com.anthropic.claude_code.tracing",
"version": "1.0.0"
},
"spans": [
{
"traceId": "19f0b758e2c26a0f65e7050c78d30ebe",
"spanId": "6c76effa0e43d56b",
"parentSpanId": "23d8202c795dbe14",
"name": "claude_code.tool.blocked_on_user",
"kind": 1,
"startTimeUnixNano": "1789532374678000000",
"endTimeUnixNano": "1789532374686419625",
"attributes": [
{
"key": "user.id",
"value": {
"stringValue": "0000000000000000000000000000000000000000000000000000000000000000"
}
},
{
"key": "session.id",
"value": {
"stringValue": "6f57a3e3-2553-4f07-bd2d-4919be9f654d"
}
},
{
"key": "organization.id",
"value": {
"stringValue": "11111111-1111-1111-1111-111111111111"
}
},
{
"key": "user.email",
"value": {
"stringValue": "someone@example.com"
}
},
{
"key": "user.account_uuid",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "user.account_id",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "terminal.type",
"value": {
"stringValue": "tmux"
}
},
{
"key": "span.type",
"value": {
"stringValue": "tool.blocked_on_user"
}
},
{
"key": "duration_ms",
"value": {
"intValue": 8
}
},
{
"key": "decision",
"value": {
"stringValue": "unknown"
}
},
{
"key": "source",
"value": {
"stringValue": "unknown"
}
}
],
"droppedAttributesCount": 0,
"events": [],
"droppedEventsCount": 0,
"status": {
"code": 0
},
"links": [],
"droppedLinksCount": 0,
"flags": 257
},
{
"traceId": "19f0b758e2c26a0f65e7050c78d30ebe",
"spanId": "9974e5aa6d8af169",
"parentSpanId": "4028c5170879c65b",
"name": "claude_code.llm_request",
"kind": 1,
"startTimeUnixNano": "1789532371445000000",
"endTimeUnixNano": "1789532374697939292",
"attributes": [
{
"key": "user.id",
"value": {
"stringValue": "0000000000000000000000000000000000000000000000000000000000000000"
}
},
{
"key": "session.id",
"value": {
"stringValue": "6f57a3e3-2553-4f07-bd2d-4919be9f654d"
}
},
{
"key": "organization.id",
"value": {
"stringValue": "11111111-1111-1111-1111-111111111111"
}
},
{
"key": "user.email",
"value": {
"stringValue": "someone@example.com"
}
},
{
"key": "user.account_uuid",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "user.account_id",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "terminal.type",
"value": {
"stringValue": "tmux"
}
},
{
"key": "span.type",
"value": {
"stringValue": "llm_request"
}
},
{
"key": "model",
"value": {
"stringValue": "claude-sonnet-5"
}
},
{
"key": "gen_ai.system",
"value": {
"stringValue": "anthropic"
}
},
{
"key": "gen_ai.request.model",
"value": {
"stringValue": "claude-sonnet-5"
}
},
{
"key": "llm_request.context",
"value": {
"stringValue": "interaction"
}
},
{
"key": "speed",
"value": {
"stringValue": "normal"
}
},
{
"key": "duration_ms",
"value": {
"intValue": 3253
}
},
{
"key": "input_tokens",
"value": {
"intValue": 2
}
},
{
"key": "output_tokens",
"value": {
"intValue": 165
}
},
{
"key": "cache_read_tokens",
"value": {
"intValue": 32682
}
},
{
"key": "cache_creation_tokens",
"value": {
"intValue": 0
}
},
{
"key": "success",
"value": {
"boolValue": true
}
},
{
"key": "attempt",
"value": {
"intValue": 1
}
},
{
"key": "request_id",
"value": {
"stringValue": "req_011Cf6UYEtKdoH9nsMYPNQ4S"
}
},
{
"key": "gen_ai.response.id",
"value": {
"stringValue": "req_011Cf6UYEtKdoH9nsMYPNQ4S"
}
},
{
"key": "client_request_id",
"value": {
"stringValue": "6ca8e9ad-82fe-49e0-a82f-3b1e7e9b2fce"
}
},
{
"key": "ttft_ms",
"value": {
"intValue": 1522
}
},
{
"key": "stop_reason",
"value": {
"stringValue": "tool_use"
}
},
{
"key": "gen_ai.response.finish_reasons",
"value": {
"arrayValue": {
"values": [
{
"stringValue": "tool_use"
}
]
}
}
}
],
"droppedAttributesCount": 0,
"events": [
{
"attributes": [
{
"key": "attempt",
"value": {
"intValue": 1
}
},
{
"key": "client_request_id",
"value": {
"stringValue": "6ca8e9ad-82fe-49e0-a82f-3b1e7e9b2fce"
}
}
],
"name": "gen_ai.request.attempt",
"timeUnixNano": "1789532371447091125",
"droppedAttributesCount": 0
}
],
"droppedEventsCount": 0,
"status": {
"code": 0
},
"links": [
{
"attributes": [
{
"key": "link.type",
"value": {
"stringValue": "parent_of"
}
}
],
"spanId": "cb73534e63c953db",
"traceId": "9ef28ed710025d61145793d8d0cb32b8",
"droppedAttributesCount": 0,
"flags": 769
}
],
"droppedLinksCount": 0,
"flags": 257
},
{
"traceId": "19f0b758e2c26a0f65e7050c78d30ebe",
"spanId": "a2eff0695d0da708",
"parentSpanId": "23d8202c795dbe14",
"name": "claude_code.tool.execution",
"kind": 1,
"startTimeUnixNano": "1789532374686000000",
"endTimeUnixNano": "1789532374768769292",
"attributes": [
{
"key": "user.id",
"value": {
"stringValue": "0000000000000000000000000000000000000000000000000000000000000000"
}
},
{
"key": "session.id",
"value": {
"stringValue": "6f57a3e3-2553-4f07-bd2d-4919be9f654d"
}
},
{
"key": "organization.id",
"value": {
"stringValue": "11111111-1111-1111-1111-111111111111"
}
},
{
"key": "user.email",
"value": {
"stringValue": "someone@example.com"
}
},
{
"key": "user.account_uuid",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "user.account_id",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "terminal.type",
"value": {
"stringValue": "tmux"
}
},
{
"key": "span.type",
"value": {
"stringValue": "tool.execution"
}
},
{
"key": "tool_use_id",
"value": {
"stringValue": "toolu_01TjbRivF1tGcKhTCazBkVUU"
}
},
{
"key": "gen_ai.tool.call.id",
"value": {
"stringValue": "toolu_01TjbRivF1tGcKhTCazBkVUU"
}
},
{
"key": "duration_ms",
"value": {
"intValue": 83
}
},
{
"key": "success",
"value": {
"boolValue": true
}
}
],
"droppedAttributesCount": 0,
"events": [],
"droppedEventsCount": 0,
"status": {
"code": 0
},
"links": [],
"droppedLinksCount": 0,
"flags": 257
},
{
"traceId": "19f0b758e2c26a0f65e7050c78d30ebe",
"spanId": "23d8202c795dbe14",
"parentSpanId": "4028c5170879c65b",
"name": "claude_code.tool",
"kind": 1,
"startTimeUnixNano": "1789532374678000000",
"endTimeUnixNano": "1789532374769682709",
"attributes": [
{
"key": "user.id",
"value": {
"stringValue": "0000000000000000000000000000000000000000000000000000000000000000"
}
},
{
"key": "session.id",
"value": {
"stringValue": "6f57a3e3-2553-4f07-bd2d-4919be9f654d"
}
},
{
"key": "organization.id",
"value": {
"stringValue": "11111111-1111-1111-1111-111111111111"
}
},
{
"key": "user.email",
"value": {
"stringValue": "someone@example.com"
}
},
{
"key": "user.account_uuid",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "user.account_id",
"value": {
"stringValue": "00000000-0000-0000-0000-000000000000"
}
},
{
"key": "terminal.type",
"value": {
"stringValue": "tmux"
}
},
{
"key": "span.type",
"value": {
"stringValue": "tool"
}
},
{
"key": "tool_name",
"value": {
"stringValue": "Bash"
}
},
{
"key": "full_command",
"value": {
"stringValue": "ls *.txt 2>/dev/null"
}
},
{
"key": "tool_use_id",
"value": {
"stringValue": "toolu_01TjbRivF1tGcKhTCazBkVUU"
}
},
{
"key": "gen_ai.tool.call.id",
"value": {
"stringValue": "toolu_01TjbRivF1tGcKhTCazBkVUU"
}
},
{
"key": "duration_ms",
"value": {
"intValue": 92
}
}
],
"droppedAttributesCount": 0,
"events": [
{
"attributes": [
{
"key": "bash_command",
"value": {
"stringValue": "ls *.txt 2>/dev/null"
}
},
{
"key": "output",
"value": {
"stringValue": "a.txt\nb.txt\nc.txt"
}
}
],
"name": "tool.output",
"timeUnixNano": "1789532374769645375",
"droppedAttributesCount": 0
}
],
"droppedEventsCount": 0,
"status": {
"code": 0
},
"links": [],
"droppedLinksCount": 0,
"flags": 257
}
]
}
]
}
]
}
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