[justsml]

Keep aggregate model-generation observations as the single billing source for each call. Nested inference observations retain diagnostics as metadata without duplicating usage or provider cost. Preserve exact observation input/output, events, canonical root correlation, runtime session identity, and child tags.

Pin the patched Mastra Langfuse adapter to 1.5.13 and regenerate the lockfile against current main. Preserve main's SDK 5.13.1 media compatibility patch and immutable retained-evidence contract. A separate mechanical formatting commit clears five inherited CI errors in four files, including the development seed fixture.

Validation with Node 24.21.0 and pnpm 12.8.1:

• Fresh frozen-lockfile install verified patch application. Lifecycle scripts were initially disabled; the allowed node-pty native build was then run and its import verified for the production build.
• 38 accounting, telemetry, media, retained-import, replacement, and suspended-usage integration tests passed using local fixtures.
• 42 Langfuse/eval gate tests, typecheck, production build, and full Biome check passed. The final post-format production build also passed.
• Dependency audit still fails: 15 findings, identical to current main (1 critical, 6 high, 7 moderate, 1 low), with no introduced advisory IDs. No audit suppression was added.

No live provider calls or live Langfuse delivery/billing verification were performed.