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The agent I built in the Console could not be adopted by ant apply
ant apply refuses some drift and silently duplicates other resources. Here is where that line sits, why claude-lock.json belongs in your commits, and the five doors a second copy walks through.
Writing 25 as your session budget caps it at twenty-five cents
Managed Agents session budgets are expressed in minor units as a string. Here is how I mixed up the unit, hit budget_reached in minutes, and what raising versus clearing a budget actually does.
Until I planted a failing sample, my unattended checks had never once failed
A check running on an unattended schedule lost its exit code to a single pipe added for readable logs. I measured where the status disappears and built a small harness that checks the checker.
A 75% cheaper cache read moved one bill by 29% and another by 2.8%
Fable 5.1 and Mythos 5.1 changed the cache read multiplier from 0.1 to 0.025. Here is how to estimate your own saving from your token mix, and how to fix code that hard-codes the multiplier.
I counted 42 skills on my shelf, and four of them were just a note saying they had moved
Claude Code v2.1.261 added /skill-doctor. Before running it I counted my own skill shelf from the files, found four tombstones, and learned that the obvious awk one-liner for spotting duplicate plugin names quietly reports skills that are not duplicates at all.
The translation read perfectly and still crashed at runtime
When you translate app strings with the Claude API, the meaning can be right while the format specifiers quietly break. Here is a severity-aware acceptance check and a repair loop that only re-translates the broken lines.
My deny rule was watching a filename, not the routes that reach it
One line in deny let several other spellings of the same file walk right past. Here is the small matrix I build to list every route to a protected file, and how I re-check it on upgrade day.
I verify what my Cowork memory claims instead of trusting its timestamp
Persistent memory keeps asserting whatever was true the day you wrote it. After an unattended job quietly read an empty folder for months, I stopped judging memory by its modification date and started attaching a verification step to every claim that can rot.
The ~/.claude.json Rollback Is Fixed in v2.1.259. Putting Back What It Erased Is Still Your Job
Concurrent sessions used to silently roll back each other's ~/.claude.json changes. v2.1.259 fixed that, but nothing restores the trust settings and MCP servers you already lost. Here is how I find and rebuild them, with a small key-path diff script.
The One File I Keep Out of Claude Code's Reach: project.pbxproj
With Xcode project files, the breakage that still opens costs far more than the breakage that refuses to open. Here is what I measured before moving every edit behind a script, and where the line sits today.
Don't Hand Your Agent the Tool That Commits — Sorting Tools Into Advise, Prepare, and Commit
Before you wrap irreversible actions in an approval gate, decide which ones never belong in the tool list at all. A three-tier inventory, a rewritten tool definition, and a small script that flags commits hiding in your schema.
Aligning Log Timezones at Display Time, or Fixing Them at Write Time
AdMob, the store reports, and my own logs each ended the day at a different moment. Here is how I went back and forth between display-side and write-side timezone handling, and what I settled on.