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Field notes/Engineering/Five patterns for tool execution in production agents

Five patterns for tool execution in production agents

Ephemeral vs. persistent, per-tenant vs. shared, and when to pay the cold-start tax on purpose.

SVSasha Volkova·FEB 19, 2026·8 MIN READ·Engineering
SBX-01C4SBX-01E3SBX-0202SBX-0221SBX-0240SBX-025FSBX-027ESBX-029DSBX-02BCSBX-02DBSBX-02FASBX-0319SBX-0338SBX-0357SBX-0376[ RUNTIME: ACTIVE ] P50 2.45S · P99 4.12S · 5M/PROJECT

00 · Preface

Ephemeral vs. persistent, per-tenant vs. shared, and when to pay the cold-start tax on purpose.

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DRAFT

We're actively editing this one. The public version will land next cycle.

SV
WRITTEN BYSasha VolkovaRuntime Engineer
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