chore: import upstream snapshot with attribution

apps/sim/lib/copilot/generated/metrics-v1.ts

@@ -0,0 +1,60 @@
+// AUTO-GENERATED FILE. DO NOT EDIT.
+//
+// Source: copilot/copilot/contracts/metrics-v1.schema.json
+// Regenerate with: bun run metrics-contract:generate
+//
+// Canonical mothership OTel metric names. Call sites should reference
+// `Metric.<Identifier>` (e.g. `Metric.CopilotToolDuration`) rather than raw
+// string literals, so the Go-side contract is the single source of truth and
+// typos become compile errors.
+//
+// NAMES ONLY. Label keys and histogram bucket boundaries are NOT in this
+// contract — Go owns the label-cardinality allowlist and the shared bucket
+// constant, and the Sim emitter MUST mirror those by hand so the Go∪Sim metric
+// union is queryable as one series set.
+
+export const Metric = {
+  CopilotCacheAttempted: 'copilot.cache.attempted',
+  CopilotCacheHit: 'copilot.cache.hit',
+  CopilotCacheWrite: 'copilot.cache.write',
+  CopilotFileReadDuration: 'copilot.file.read.duration',
+  CopilotFileReadSize: 'copilot.file.read.size',
+  CopilotMessagesSerializeDuration: 'copilot.messages.serialize.duration',
+  CopilotRequestCount: 'copilot.request.count',
+  CopilotRequestDuration: 'copilot.request.duration',
+  CopilotToolCalls: 'copilot.tool.calls',
+  CopilotToolDuration: 'copilot.tool.duration',
+  CopilotVfsDelta: 'copilot.vfs.delta',
+  CopilotVfsMaterializeDuration: 'copilot.vfs.materialize.duration',
+  GenAiClientCacheTokenUsage: 'gen_ai.client.cache.token.usage',
+  GenAiClientTokenUsage: 'gen_ai.client.token.usage',
+  LlmClientErrors: 'llm.client.errors',
+  LlmClientOutputCutoff: 'llm.client.output_cutoff',
+  LlmClientStreamDuration: 'llm.client.stream.duration',
+  LlmClientTimeToFirstToken: 'llm.client.time_to_first_token',
+} as const
+
+export type MetricKey = keyof typeof Metric
+export type MetricValue = (typeof Metric)[MetricKey]
+
+/** Readonly sorted list of every canonical mothership metric name. */
+export const MetricValues: readonly MetricValue[] = [
+  'copilot.cache.attempted',
+  'copilot.cache.hit',
+  'copilot.cache.write',
+  'copilot.file.read.duration',
+  'copilot.file.read.size',
+  'copilot.messages.serialize.duration',
+  'copilot.request.count',
+  'copilot.request.duration',
+  'copilot.tool.calls',
+  'copilot.tool.duration',
+  'copilot.vfs.delta',
+  'copilot.vfs.materialize.duration',
+  'gen_ai.client.cache.token.usage',
+  'gen_ai.client.token.usage',
+  'llm.client.errors',
+  'llm.client.output_cutoff',
+  'llm.client.stream.duration',
+  'llm.client.time_to_first_token',
+] as const