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12 articlesMultimodal Traces: When Modalities Must Share an ID
Multimodal agents shatter the span tree the moment voice, vision, and LLM each open their own root. The fix is a turn ID, attached artifacts, and one owner for the join.
The Agent That Retried Its Way Past Your Rate Limit
Your token bucket measures user clicks; the bill measures model calls. When a single click fans out into thirty calls, the limiter at the HTTP boundary becomes a paper umbrella.
The AI Literacy Gap Inside Your Own Team Is the Biggest Delivery Risk on Your Roadmap
Your team's stated AI capability is the maximum of its members' skill, while delivery velocity is the median — and that gap is the most underpriced risk on your roadmap.
The Cached Prompt Prefix That Grew Arms and Legs
Six months ago your prompt prefix was 4k tokens and amortized to nearly free. Today it is 11k tokens, your cache hit rate is 31 percent, and nobody can point to the PR that did it.
The CI Agent With Merge Rights at 3 AM
Wiring an AI agent into CI with merge rights creates a new operational class your SRE runbook never named. Type its actions, queue what cannot run unattended, log every change with attribution, and rehearse the kill switch.
The Dead Tool Nobody Can Remove From the Registry
A tool nobody owns can sit in your shared agent catalog forever, taxing every inference in tokens, selection accuracy, and security surface. Build the deprecation lifecycle that lets you remove it.
The Power User Who Learned Your Prompt By Trial
Your AI feature has an undocumented contract with its users, encoded in the system prompt. A small fraction of patient users reverse-engineer it; the rest get a worse product. Surface the contract instead of hiding it.
The Production Logs Your Agent Cannot Read
Wiring an agent into your log stack gives it access, not understanding. The real integration work is teaching it what your data is called.
The Streaming Response That Committed Before the User Said Yes
Streaming UX inherits a reversibility contract that tool calls do not honor. Here is why the stop button can't unsend the email, and the framework changes that fix it.
When the Agent Asks Forgiveness Instead of Permission
The autonomy default that turns 'undo' into an aspirational verb — and the tool-layer, eval, and orchestrator discipline that keeps agents from acting first and apologizing later.
When the Intern Deploys an Agent on Day One
New-hire onboarding gives humans a tenure gradient; agents inherit production-grade permissions on day three. Inside the seam where security review, the tool registry, and the chargeback bucket meet — and why it has no owner yet.
When Two AI Features Compete for the Same Click
Two AI features can each pass their own A/B test and still make the product worse. Cross-feature attention competition is a portfolio problem no team-level dashboard will catch.
About Tian Pan
I'm Tian Pan, an engineer-founder focused on agentic engineering — building autonomous AI systems and scaling engineering teams. I write practical guides on system design, technical leadership, and shipping with AI agents. Previously an early engineer at Uber, Brex, and IoTeX.
