Claude Code Tightens Plugin Auth as Agent Evals Get Stateful
Friday, August 21, 2026 · 9 min
Claude Code v2.1.238 adds marketplace header helpers, runner controls, and long-session fixes, while Microsoft’s ThinkingBox benchmark and MCP migration notes push agent tooling toward stateful, observable production behavior.
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Claude Code v2.1.238 adds marketplace header helpers, runner controls, and long-session fixes, while Microsoft’s ThinkingBox benchmark and MCP migration notes push agent tooling toward stateful, observable production behavior.
In this episode
- v2.1.238 — Anthropic
What's changed Added a keybindingFlavor setting: set it to "readline" to make Ctrl+W in the prompt delete back to the previous whitespace, as in Bash; the default ( "classic" ) is unchanged Plugin marketplaces: headersHelper on a url marketplace or a catalog entry runs a command that mints HTTP headers (e.g. a short-lived token) for catalog and same-origin archive fetches A catalog entry's…
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ThinkingBox: Measuring whether agents finish the job # How we built ThinkingBox to measure whether agents finish the job ThinkingBox separates the execution framework from the benchmark package. This split lets builders update the harness and benchmark independently. By Liang-Chun Tsai Principal Machine Learning Engineer, Microsoft 2026.08.19 You ask a travel support agent to add a…
- When your MCP tool fails: errors, hangs, and empty results — what Claude Code actually does with each - DEV Community — DEV Community
When your MCP tool fails: errors, hangs, and empty results — what Claude Code actually does with each - DEV Community Yesterday I posted a one-liner on Bluesky: an MCP tool that errors teaches the model something, one that hangs teaches it nothing. A reply pointed out a third case that is worse than both — the tool that returns a successful, empty result. It doesn't burn the turn. It burns the…
- MCP 2.0 Breaking Changes Every QA Engineer Must Know — Scrolltest
MCP 2.0 Breaking Changes Every QA Engineer Must Know # MCP 2.0 Breaking Changes Every QA Engineer Must Know By Promode August 19, 2026 August 19, 2026 On July 28, 2026, the MCP Python SDK shipped version 2.0.0 as a stable release, and `pip install mcp` now installs 2.x by default. If your team built test tooling, AI agents, or browser automation on top of the Model Context Protocol in the…
- 36% Cheaper, 38% Faster: What Structured AI Context Is Worth — Blog — Unabyss — Unabyss
36% Cheaper, 38% Faster: What Structured AI Context Is Worth — Blog — Unabyss ← Back to the blog Marcin Uchacz Marcin Uchacz on LinkedIn Marcin Uchacz on X CEO & Co-founder, Unabyss 20 August 2026 · 4 min read We ran the same 20 tasks 60 times in Claude Code, changing one thing: whether the assistant had our context structured and waiting, or had to go assemble it. With context ready, the…