AI HarnessBuilding an Evaluation Harness for Your AgentThe best way to build agent eval harness infrastructure isn't LLM-as-judge. Learn to design verifiable tasks and programmatic graders you can actually trust.August 28, 2026·8 min read
AI HarnessWhat Is an Eval Harness, and Why Do Agents Need One?An AI eval harness tells you your agent works across a hundred tasks, not just the one you tried. Learn what it measures and why agents need it more than models.August 28, 2026·8 min read
AI HarnessLogging and Tracing in an Agent Harness: A Case StudyAgent harness logging that only captures the final answer can't debug anything. A case study on structured, trace-ID'd per-step logging that found the bug fast.August 28, 2026·9 min read
AI HarnessHow to Add Timeouts to Every Tool in the HarnessA single hung tool can burn more budget than a thousand good calls. Learn to add a harness tool timeout to every call, with process-group killing done right.August 28, 2026·9 min read
AI HarnessRetry Logic in an AI Harness: Safe by DefaultNaive agent harness retry logic double-charges cards. Learn to classify errors, respect idempotency, and use keys so a lost response never runs twice.August 28, 2026·9 min read
AI HarnessHandling Model Output That Won't Parse in Your HarnessAn agent output parse error isn't one problem — it's three. Learn to tell truncation from malformation from schema mismatch, and fix each the right way.August 28, 2026·8 min read
AI HarnessFile System Access in an Agent Harness: A Case StudySafe agent file system access means never trusting a path you didn't resolve. A docs team's case study on the os.path.join trap and the jail that fixed it.August 28, 2026·8 min read
AI HarnessBuilding a Safe Shell Tool for Your Agent HarnessAgent shell tool safety comes down to allowlists, argument validation, and never using shell=True. A step-by-step guide to a shell tool you can trust.August 28, 2026·9 min read
AI HarnessHow to Sandbox Code Execution in Your Agent HarnessAn agent code execution sandbox has to stop more than file deletion. Here's how to block network exfiltration, strip credentials, and cap resources safely.August 28, 2026·9 min read
AI HarnessTool Routing Inside an AI Harness: A Practical GuideAgent tool routing is more than a dictionary lookup. Learn argument validation, ambiguity detection, and state-gating that stop confident, silent failures.August 27, 2026·8 min read
AI HarnessThe Parsing Layer: Turning Model Output Into ActionsGood agent output parsing isn't about salvaging more from the model. It's about rejecting bad output loudly. A fintech case study on why strict beats forgiving.August 27, 2026·9 min read
AI HarnessBuilding a Minimal Agent Harness in Python From ScratchYou can build agent harness Python code in about 40 lines. This copy-paste guide takes you from a working loop to a debuggable, timeout-safe harness.August 27, 2026·9 min read
