Existence Checks Pass, Writes Fail — Probing Capabilities Before an Unattended Run
A directory existing and a directory being writable are two different facts. Measured results from five broken-environment cases, why static clues cannot predict the worst of them, and a capability-probe preflight for unattended Claude Code runs.
When 41 of 20,000 Message Batches Requests Quietly Vanished — Field Notes on Reconciling and Requeuing Partial Failures
processing_status: ended does not mean every request succeeded. How errored and expired results hide inside a finished batch, and how a custom_id ledger catches every gap and requeues safely — with real cost and timing numbers.
Designing the Give-Up Condition in Self-Repair Loops: Four Error Classes, Four Retry Budgets
LLM self-repair loops break on the fantasy that 'if you keep fixing, it eventually passes.' Classify errors into four classes, give each its own retry budget. Working TypeScript and real cost numbers included.
Running Subagents in Parallel Without One Failure Sinking the Whole Run
A fan-out / fan-in design for running several subagents in parallel, covering token budgeting, a result contract, and partial-failure handling. Includes an implementation where one branch can fail without stopping the rest, plus measured numbers.
What to Do When Claude Code Hits the Context Window Limit
Long Claude Code sessions eventually hit the 200k token limit and stall. Here's how to use /compact, --continue, and session design patterns to keep development moving without losing context.
Decoding Claude's 'Spanner Temporarily Unavailable' Error and How to Handle It
The 'Spanner temporarily unavailable' error occasionally appears in Claude API and Claude.ai responses. This guide unpacks what the message reveals about Anthropic's infrastructure and walks through practical retry strategies that production teams actually use.
Three Hidden Pitfalls When Implementing Claude API Streaming
Real-world lessons from building with Claude API streaming: runtime environment mismatches, error handling gaps, and silent token cost overruns — with working TypeScript examples.
Claude API Streaming & Tool Use in Production — Patterns for Parallel Calls, Error Handling, and Retry Strategies
Master production-grade streaming and tool use patterns with Claude API. Learn parallel tool calling, intelligent error handling, resilient retry strategies, and resource optimization.
Claude API Error Handling and Retry Strategies
Learn about Claude API error codes, retry strategies, and rate limit handling. Best practices for building robust API integrations in production.