A generator given the wrong context does not stop
Scoping a context pack by project type saved 8.2% per subagent, not the 40% I guessed. The real risk is a thin pack: a missing surface makes a generator invent.
ai
46 posts
The corpus your generator reads is production code
The corpus a generator reads is as load-bearing as the code it emits. A hand-edit to it has no provenance and is dropped by the next re-sync.
An agent-driven refactor, with the receipts
Before and after on a real module migration: what proved the change was inert, what the agent got wrong, and the receipt that made it safe to run at all.
The most useful thing my agent does is refuse
Refusals are only useful if they name the remedy. Four that fired during one session, what each redirected me to, and the one that fired on nothing at all.
The context window is not your constraint — what you put in it is
Scoping a shared instruction bundle saved 8.2% per worker, against 40% guessed. Why residency beats capacity, and the surface that was never loaded at all.
I swept the parameter instead of arguing about it
A threshold argument settled by measuring four values over the real corpus. The knee, the trade that stops paying, and why the numbers go in the comment.
The same rule in two files is how agent-written code drifts
A protected-path list was typed by hand and had drifted nine entries behind reality. Derive the list instead of copying it, and gate the copies you keep.
The prompt is not the artifact — the runtime is
A behaviour defect belongs in the command's runtime file, not in better instructions next time. What to edit, how to lock it, and where that stops working.
429 is not an error, it is a schedule
Transient and terminal failures need opposite responses and look identical. How to tell them apart, and why partial progress must be persisted before it is believed.
Six guardrails that stop my AI agent mid-command
Six PreToolUse hooks that refuse an agent's command before it runs. What each one caught, and why a guard the agent can talk its way past is not a guard.
Subagents are context isolation, not parallelism
Every dispatched worker pays a fixed setup cost before it does anything. Where the crossover sits, and why a ten-item batch ran faster serially.
A verification step that can pass while the bug is present is not a verification step
Static checks read what was written; the defect lives in what was drawn. Four artifacts that passed every gate this session and failed the moment someone looked.