CLAUDE LABJP
BILLING — 1 day to the Jun 15 change: Agent SDK, headless runs, GitHub Actions, and third-party agents move to separate monthly credits ($20/$100/$200) metered at full API rates, no rolloverFABLE5 — Claude Fable 5, a Mythos-class model billed as Anthropic's most capable generally available release, is usable in Claude Code v2.1.170+ (launched Jun 9)SUBAGENTS — Claude Code sub-agents can now spawn their own sub-agents, with smarter model and region handlingENTERPRISE — Custom roles gain admin permissions, letting members reach billing and privacy settings without Owner accessPLUGINS — New plugin search plus better Chrome, VSCode, and terminal workflows; session, memory, and permission bugs fixedUI — New setting disables mouse-wheel scroll acceleration in fullscreen; the /model picker now shows model families correctlyBILLING — 1 day to the Jun 15 change: Agent SDK, headless runs, GitHub Actions, and third-party agents move to separate monthly credits ($20/$100/$200) metered at full API rates, no rolloverFABLE5 — Claude Fable 5, a Mythos-class model billed as Anthropic's most capable generally available release, is usable in Claude Code v2.1.170+ (launched Jun 9)SUBAGENTS — Claude Code sub-agents can now spawn their own sub-agents, with smarter model and region handlingENTERPRISE — Custom roles gain admin permissions, letting members reach billing and privacy settings without Owner accessPLUGINS — New plugin search plus better Chrome, VSCode, and terminal workflows; session, memory, and permission bugs fixedUI — New setting disables mouse-wheel scroll acceleration in fullscreen; the /model picker now shows model families correctly
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API & SDK/2026-06-14Advanced

Making Claude Agent SDK Tools Idempotent — Stopping Double Execution with Deterministic Keys and an Outbox

An implementation log for stopping a Claude Agent SDK retry or session resume from processing the same payment twice. Three patterns — deterministic idempotency keys, an outbox, and a lightweight wrapper — with runnable code and production metrics.