Tuesday, April 21, 2026
Daily picks
12
articles scored
#1 GOLDReleaseClaude Code Releases
v2.1.116
- `/resume` on large sessions (40MB+) is now up to 67% faster — if you work with long-running sessions, this is immediately noticeable
- MCP startup is faster when you have multiple stdio servers: the `resources/templates/list` call is now deferred until you actually type `@` to reference a resource
- Security fix: sandbox auto-allow no longer bypasses the dangerous-path safety check for `rm`/`rmdir` targeting `/`, `$HOME`, or other critical system directories
- The thinking spinner now shows inline progress text ("still thinking", "thinking more", "almost done thinking") instead of a separate hint row
- `/config` search now matches option values — searching "vim" finds the Editor mode setting; `/doctor` can now be opened while Claude is mid-response
#2 SILVERReleaseGitHub anthropics/claude-agent-sdk-python
[Release] anthropics/claude-agent-sdk-python: v0.1.64
- The Python SDK now has full `SessionStore` support at parity with the TypeScript SDK — store, load, fork, and list sessions against any backend you implement
- Three ready-to-copy reference adapters included: S3 (JSONL part files), Redis (RPUSH/LRANGE), and Postgres (asyncpg + jsonb) — copy whichever file you need into your project, no extra wheel dependency
- A 13-contract conformance test harness at `claude_agent_sdk.testing.run_session_store_conformance` lets third-party adapter authors verify their implementation is correct
- Install: `pip install claude-agent-sdk==0.1.64`
#3 BRONZEGuideDev.to Claude
Claude Prompt Caching in 2026: The 5-Minute TTL Change That's Costing You Money
- Anthropic dropped prompt cache TTL from 60 minutes to 5 minutes in early 2026 — a batch worker that previously got 20 reads per cache write now gets ~2, cutting effective savings from 84% to ~52%
- Who gets hit hardest: batch pipelines with gaps longer than 5 minutes, cron agents on 15-30 minute schedules, and chat apps where user sessions go idle