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2026-06-12feat(metrics): expose current context size to the frontendAdam Malczewski
contextSize = the turn's FINAL step inputTokens+outputTokens (true context occupancy; NOT the aggregate usage, which sums per-step prompts and overcounts multi-step turns). Stamped on both the live done event (kernel) and persisted TurnMetrics (session-orchestrator); a client reads the latest turn's value. - @dispatch/wire 0.4.0->0.5.0: optional contextSize on TurnDoneEvent + TurnMetrics - @dispatch/transport-contract 0.5.0->0.6.0 (re-export only) - glossary: context size (reserve 'context window' for the model limit, later) - FE courier: frontend-context-size-handoff.md 881 vitest pass; tsc -b EXIT 0; biome clean.