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Development Journey

Hash-Sealed Evidence: One Feature, 19,461 Lines Rebuilt

Sealed evidence expires when content changes. Adding a feature to omaTrail rewrote 19,461 lines of its balance report before shipping.

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Technical Deep-Dive

The Primary Record Settles What a Derived One Assumed

A derived record inherits facts from other derived records. Four systems in one day carried a confident wrong fact until a primary source settled it.

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Technical Deep-Dive

Auditing Written Claims Against Their Artifacts

A second review pass checks written claims against the artifacts they cite. It repaired about twenty statements of fact in records already treated as done.

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Development Journey

Claude Code Subagents Load at Session Start, Not at Commit

Claude Code registers project subagents at session start, so committed agents aren't available until restart. A human caught it, not the system.

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Development Journey

When a Gate Should Re-Run the Step Instead of Trusting Its Receipt

Have the gate re-run a deterministic step instead of trusting its receipt. Why the lander heals the record itself, and why uncommitted makes it safe.

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DevOps

Contract Tests Caught a 25 MiB Upload Truncation Reported as HTTP 201

Recorded-fixture contract tests found an upload truncated at 25 MiB and recorded as HTTP 201. The audit grade fell to B+ while coverage rose to 99.67%.

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Architecture

Photo to Listing: Barcode Decoding and LLM Re-rank

Exact issue identification is retrieval work, not vision work. How a photo to listing pipeline puts the LLM in the re-rank seat behind an evidence gate.

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Technical Deep-Dive

Every Claim Needs a Shipped Source and an Executable Proof

Every claim needs a shipped source and an executable proof. What a six-hour audit that closed nothing found out about code that was already finished.

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Technical Deep-Dive

One Corrected Check, Fifteen Repos

Correcting a gate is cheap. Propagating it through fifteen repos on a vendored, hash-pinned lane is the part that costs a day.

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Technical Deep-Dive

Scope the Guard to What the Job Actually Writes

Scope a guard to the paths its job actually writes. How a nightly producer kept aborting on edits it would never have touched.

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