Anthropic squeezes third-party Claude Code harnesses

Anthropic sent notices blocking Claude Code subscriptions from working with OpenClaw and other third-party harnesses, citing 'outsized strain on systems.' The HN thread from the original story captures real frustration: users who paid for a subscription feel they are being told they used too much of what they paid for. One commenter frames it as 'buying a buffet and getting kicked out for eating too much.'

The pattern is familiar. A platform builds adoption by being permissive, then tightens the terms once the ecosystem depends on it. Anthropic is essentially forcing power users onto the API with usage caps and per-token billing, which is more predictable for Anthropic's infrastructure but more expensive and variable for the builders who built on top of the subscription model.

The thread notes that 'agent-agnostic' tools are coming that can run across Claude Code, other CLIs, and custom UIs using MCP. That's the market response: if Anthropic tightens one pipe, the ecosystem routes around it.