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The Anthropic SDK retries a failed call twice in about 1.2 seconds, which is fine for a chat request and wrong for a 200-turn agent run. Classify every failure into retry-after, capacity, transient or terminal, retry the model turn (never the tool call), share one pause gate across workers, catch the mid-stream overloaded_error that arrives as a 200, and checkpoint so a dead run resumes. Tested against anthropic 2.3.0 for Python.

A guard hook that crashes or times out lets the dangerous command through in most coding agents. Fail closed for pre-action guards, fail open for everything else, and make the script fail closed by itself because Copilot, Codex and Gemini CLI treat a timeout as allow. Compared on Claude Code 2.1.295+, Cursor hooks, Copilot CLI 1.0.105, Codex and Gemini CLI, with a portable guard script.

Grpc.AspNetCore and Grpc.Net.Client 2.85.0 now apply MaxReceiveMessageSize to the decompressed size of gzip and deflate messages. A 260 KB request that inflates to 256 MiB is rejected with ResourceExhausted, but legitimate large compressed payloads can start failing too.

A tested, file-by-file conversion of a Flutter app's settings.gradle, build.gradle and app/build.gradle to Kotlin DSL on Flutter 3.44.8, AGP 9.0.1 and Gradle 9.1.0, with the real compiler errors each naive rename produces and the exact fix for signing configs, flavors, minifyEnabled and kotlinOptions.

A yield return method costs one 40-byte state machine object per call no matter how many items it produces; a List<T> costs the whole backing array up front. Measured on .NET 10.0.10: iterator wins on memory and early exit, List<T> wins when the caller enumerates more than once, needs Count, or calls ToList().

Both end in the same OS call, so the timestamp written is identical. The differences are around it: which cache gets invalidated, whether directories work on Windows, how a non-UTC DateTime is converted, and whether you can target an open handle. Use File.SetLastWriteTimeUtc, by handle when the file is open. Verified on .NET 10.0.10.

Marten 9.55.0 lowers document aliases, DDL template keys and flat-table upsert function names with the invariant culture. Apps running under tr-TR or az-AZ that store documents in tables like mt_doc_ınvoice must rename them first, or their data appears to vanish.

Moving an agent from claude-sonnet-4-6 or claude-opus-4-7 to claude-sonnet-5-5 or claude-opus-5-5 is not just a model ID swap. Thinking is always on, thinking-off and forced tool_choice now return 400, the effort defaults moved, Sonnet counts about 30% more tokens, and Claude Code ignores your old effortLevel on Opus 5.5. Here is the full checklist with before/after code.

On .NET 10 a plain for loop over span[i] bounded by span.Length compiles to a bounds-check-free, strength-reduced, down-counting loop. A hand-written Unsafe.Add(ref r, i) loop with an int index keeps a sign extension and an up-counting compare, and measured 2-5% slower. Benchmarks and JIT disassembly for arm64 and x64 on .NET 10.0.10.

Use shared_preferences (SharedPreferencesWithCache) for a handful of flat flags and a JSON file in getApplicationSupportDirectory for a structured settings object. Covers the atomic-write pattern, the concurrent-save race, the Documents-folder trap on Windows and Linux, web support, and measured write costs on Flutter 3.44.8.