Who contributed to Anthropic on May 6, 2026?

3 developers shipped this update, including sarahdeaton, qing-ant, and dhollman.

What were the notable Anthropic updates?

v0.4.0, release: 0.4.0 (buffa 0.5.0 sync, Companion files, natural-path examples), and codegen: add file_per_package output layout.

@anthropics

Claude SDKs and developer tooling

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The Wire · Showcase

CONNECT-RUST 0.4.0 SHIPS WITH BUFFA 0.5.0 SYNC AND COMPANION FILES

By RepoJournal · Filed 06:02 UTC on May 6, 2026 · About Anthropic

3 people shipped this

sarahdeaton @sarahdeaton 1 cited

qing-ant @qing-ant 1 cited

dhollman @dhollman 1 cited

Connect-rust v0.4.0 lands major codegen overhaul with file-per-package layout and companion file support, syncing the entire Protobuf stack for cleaner builds.

The connect-rust team shipped v0.4.0 [1] with three critical codegen improvements that reshape how Rust services are generated. The release bumps buffa to 0.5.0 [2], adopting companion file emission (`<stem>.__connect.rs`) [2] and the new `file_per_package` output layout [3] that collapses per-proto splits into a single dotted-package file with all service stubs inlined—a direct win for BSR cargo SDK generation and tonic-style integrations. Graceful shutdown now matches Go's net/http.Server.Shutdown behavior [1], fixing a long-standing async cleanup gap. Python SDK parity is closing fast: `include_hook_events` [5] now surfaces PreToolUse, PostToolUse, and Stop events as HookEventMessage, the Python agent SDK added xhigh effort support [6] to match Opus 4.7's capability ceiling, and defer-round-trip support [4] brings the Python SDK into sync with TypeScript for permissioned tool execution. The cwc-makers plugin shipped zero-install onboarding [7] for Cardputer flashing events, with a curl+tar fallback [8] that kills the git dependency entirely on every OS. Claude Code and Agent SDK both bumped to 2.1.129 and 0.2.129 [9] across the action suite.

Action items

→ Upgrade connect-rust to 0.4.0 if using buffa codegen anthropics/connect-rust [plan]
→ Adopt file_per_package layout in new builds targeting BSR or tonic anthropics/connect-rust [plan]
→ Regenerate Python SDK stubs to get hook events and defer support anthropics/claude-agent-sdk-python [plan]
→ Bump Claude Code and Agent SDK to 2.1.129 / 0.2.129 in CI workflows anthropics/claude-code-action [plan]

References

[1] v0.4.0 ↗ anthropics/connect-rust
[2] release: 0.4.0 (buffa 0.5.0 sync, Companion files, natural-path examples) ↗ anthropics/connect-rust
[3] codegen: add file_per_package output layout ↗ anthropics/connect-rust
[4] feat: support "defer" hook decision and ResultMessage.deferred_tool_use ↗ anthropics/claude-agent-sdk-python
[5] feat: add include_hook_events option ↗ anthropics/claude-agent-sdk-python
[6] feat(types): add "xhigh" to effort Literal (#914) anthropics/claude-agent-sdk-python
[7] Add cwc-makers plugin: /maker-setup Cardputer onboarding ↗ anthropics/claude-plugins-official
[8] cwc-makers: curl+tar fallback when git is missing (#1731) anthropics/claude-plugins-official
[9] chore: bump Claude Code to 2.1.129 and Agent SDK to 0.2.129 anthropics/claude-code-action

Quick answers

What shipped in Anthropic on May 6, 2026?: Connect-rust v0.4.0 lands major codegen overhaul with file-per-package layout and companion file support, syncing the entire Protobuf stack for cleaner builds. In total, 21 commits, 17 pull requests, and 3 releases landed.
Who contributed to Anthropic on May 6, 2026?: 3 developers shipped this update, including sarahdeaton, qing-ant, and dhollman.
What were the notable Anthropic updates?: v0.4.0, release: 0.4.0 (buffa 0.5.0 sync, Companion files, natural-path examples), and codegen: add file_per_package output layout.

CLAUDE AGENT SDK FIXES STDIN CLOSURE BUG IN BACKGROUND TASKS

The Python SDK's query method was prematurely closing stdin when background subagents were still in flight, breaking tool calls and silently bypassing hooks - now fixed in v0.2.127.

ai 16 shipped 1-min read

@anthropics 1 day ago

BUFFA v0.9.1 PATCHES REGRESSION THAT BROKE ORDINARY SCHEMAS

Buffa shipped an emergency patch overnight after v0.9.0 broke codegen on schemas with a few hundred proto files, small enough to hit in production.

ai 113 shipped 1-min read

@anthropics 2 days ago

CLAUDE FOUNDATION MODELS ADDS APP ATTEST, PLUGIN ECOSYSTEM STABILIZES

iOS developers can now ship Claude calls without API keys in the binary, backed by Apple's Secure Enclave.

ai 111 shipped 1-min read

@anthropics 3 days ago

BUFFA FIXES V0.9.0 REGRESSION, CLAUDE PLUGINS ECOSYSTEM GAINS 9 NEW INTEGRATIONS

Buffa's codegen was silently rejecting moderately large schemas due to a memory bound meant only for untrusted input, but a fix shipped overnight restores throughput and clears the path for googleapis-scale proto sets.

ai 156 shipped 2-min read

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CLAUDE OPUS 5 LANDS ACROSS THE STACK

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ai-agents 28 shipped 1-min read

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