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feat(stats): aggregate token/cost totals in cache-analyzer

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This commit is contained in:
Kjell Tore Guttormsen 2026-06-26 14:38:16 +02:00
commit 62ebc28e3f
2 changed files with 102 additions and 0 deletions
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24
lib/stats/cache-analyzer.mjs
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@ -43,6 +43,16 @@ export function summarize(lines) {
unique_event_names: [],
oldest_event_iso: null,
newest_event_iso: null,
// SKAL-2 token/cost aggregation (additive; zero when no token records).
// With upsert semantics (one record per session_id), summing across lines
// = correct cross-session aggregate. cost_usd is summed only when finite;
// a null (refuse-to-estimate) record still counts in sessions_with_tokens.
total_tokens_input: 0,
total_tokens_output: 0,
total_tokens_cache_creation: 0,
total_tokens_cache_read: 0,
total_cost_usd: 0,
sessions_with_tokens: 0,
};
const durations = [];
@ -71,6 +81,20 @@ export function summarize(lines) {
if (newestMs === null || t > newestMs) newestMs = t;
}
}
// SKAL-2: aggregate token/cost from token-bearing records (token-usage
// schema). Detect by presence of any numeric token field.
const tokenKeys = ['tokens_input', 'tokens_output', 'tokens_cache_creation', 'tokens_cache_read'];
const hasTokens = tokenKeys.some(k => typeof obj[k] === 'number' && Number.isFinite(obj[k]));
if (hasTokens) {
summary.sessions_with_tokens++;
if (Number.isFinite(obj.tokens_input)) summary.total_tokens_input += obj.tokens_input;
if (Number.isFinite(obj.tokens_output)) summary.total_tokens_output += obj.tokens_output;
if (Number.isFinite(obj.tokens_cache_creation)) summary.total_tokens_cache_creation += obj.tokens_cache_creation;
if (Number.isFinite(obj.tokens_cache_read)) summary.total_tokens_cache_read += obj.tokens_cache_read;
// cost_usd may be null (refuse-to-estimate) — sum finite values only.
if (Number.isFinite(obj.cost_usd)) summary.total_cost_usd += obj.cost_usd;
}
}
if (durations.length > 0) {