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What checking 244 calculators against their sources actually found

What checking 244 calculators against their sources actually found

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4 min read
A playable preview is not a recovered original

A playable preview is not a recovered original

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3 min read
Label Spans With a Free Model, Then Gate the Labels on Agreement

Label Spans With a Free Model, Then Gate the Labels on Agreement

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5 min read
Forty Trials Can Kill a Free Tier. They Can't Crown It.

Forty Trials Can Kill a Free Tier. They Can't Crown It.

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6 min read
Witness Maps: Never Refactor a Line That No Test Executes

Witness Maps: Never Refactor a Line That No Test Executes

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7 min read
Record Once, Replay Forever: Cassette Tests for Flaky Agent Tool Calls

Record Once, Replay Forever: Cassette Tests for Flaky Agent Tool Calls

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4 min read
Case Study: A Doc-Drift Ledger That Only Sends Changed Symbols to a Model

Case Study: A Doc-Drift Ledger That Only Sends Changed Symbols to a Model

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7 min read
Ambiguous, Invalid, or System Error?

Ambiguous, Invalid, or System Error?

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4 min read
Claim Cards: A Take-Home That Grades What the Candidate Verified, Not What They Built

Claim Cards: A Take-Home That Grades What the Candidate Verified, Not What They Built

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6 min read
Postmortem: A Cached Verdict Passed a Diff the Model Never Saw

Postmortem: A Cached Verdict Passed a Diff the Model Never Saw

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5 min read
The Cold Boot Audit: Six Anti-Patterns a Warm Free Tier Hides

The Cold Boot Audit: Six Anti-Patterns a Warm Free Tier Hides

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4 min read
The Alert Renamed a Label, the Runbook Rendered Blank: Contract-Testing Payloads Before 3am

The Alert Renamed a Label, the Runbook Rendered Blank: Contract-Testing Payloads Before 3am

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6 min read
A Model Fallback PR: What to Trust, What to Revert, What to Test

A Model Fallback PR: What to Trust, What to Revert, What to Test

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5 min read
The Model May Draft the Prose. The Repo Must Confirm the Facts.

The Model May Draft the Prose. The Repo Must Confirm the Facts.

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6 min read
Two Reviewers, One Patch: Treating Model Disagreement as a Triage Signal

Two Reviewers, One Patch: Treating Model Disagreement as a Triage Signal

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7 min read
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