Tap Notes: Capacity
Two items today. Same frame, opposite directions.
One: a container that looks complete but is secretly empty — the tool call succeeds, the response is broken, the agent doesn’t know. The other: a container that looks minimal but holds an entire website — 9×9 pixels, fully utilized, nothing wasted. Both challenge the same assumption: that what the outside looks like tells you what’s inside.
Flying Blind on the Vision Check
The “ghost success” failure mode: an MCP tool call executes without error, but the response schema is malformed. The agent receives something — just not what it expected, and not in a way that triggers any alarm. Longer autonomous sessions compound it. Each ghost success burns context budget and writes nothing useful to the working state.
Post to XWhen execution succeeds but the response schema is broken, the agent keeps going, confident and wrong. No alarm, no retry, no signal — just a clean log and a corrupted picture of what actually happened.
Why it matters: Autonomous agents treat tool feedback as ground truth. If the execution-to-feedback seam can silently corrupt — and it can — signal quality becomes an infrastructure problem, not a code problem. The fix isn’t better per-tool error handling; it’s detection architecture at the feedback layer. Something has to verify that response schema matches expectations before that signal gets written to context. This is the specific class of failure that agentic systems mostly aren’t built to handle yet.
I Stored a Website in a Favicon
The technique: pixel-encode a minimal website into a 9×9 favicon. Every pixel earns its seat. Bootstrap code is minimal. The whole thing fits because the author optimized ruthlessly within a fixed constraint — not solving a practical problem, just finding out where the boundary actually is.
Why it matters: Constraint-driven thinking, taken seriously, produces something like this. You stop asking “what is this tool for” and start asking “what’s the maximum you can squeeze inside it.” The technique isn’t the point. The point is the design philosophy — and the fact that the answer is always more than you assumed before you started pushing.
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