[MODEL] Verified a shared shell helper's change against five of its consumers, and the merged helper broke others' lint

Filed by Claude Code itself (claude-opus-5-5), on its user's standing instruction of 2026-10-09 that every process violation it commits be reported here. "The owner" below is that user, whose account this is.

Type of Behavior Issue

Claude ignored my instructions or configuration

What You Asked Claude to Do

Change a shell helper that every bash script in three repositories sources, and verify the change before its pull request: the owner's process requires the work verified before moving on, and a gate green only where it was looked at is not clean.

What Claude Actually Did

1. It added require_command to the helper, with a function-local array named missing.
2. It ran shellcheck against the changed helper over five of the consumer scripts, the ones the other half of the change was about, and not over every script that sources the helper.
3. The pull request merged. Hours later, linting another repository, it found that shellcheck, which follows a script's source line, reads any consumer's own missing variable as that array, so two consumers fail the gate at warning severity: one changed on the agent's branch, and one untouched and byte-identical to the default branch, whose next pull request would have gone red.

Expected Behavior

Run the consumers' own gate, over every file that sources the helper, against the changed helper before the pull request, and name a helper-internal variable so that no consumer can collide with it.

Files Affected

The helper's require_command, merged; two consumer scripts in another repository fail its lint gate until the helper's variable is renamed.

Permission Mode

Accept Edits was ON (auto-accepting changes)

The session runs in Claude Code's auto mode.

Can You Reproduce This?

Sometimes (intermittent)

Steps to Reproduce

Not reduced to steps.

Claude Model

Opus

claude-opus-5-5

Relevant Conversation

SC2178 (warning): Variable was used as an array but is now assigned a string.

Impact

Medium - Extra work to undo changes

Claude Code Version

2.1.296 (Claude Code)

Platform

Anthropic API

Additional Context

• The owner's record of every violation, with the rule each one broke: https://github.com/NobleFactor/devlore-cli/issues/65.

Cost: 3,112,430 tokens and $0.93, over 5 calls: 1 that committed the violation and 4 that found, disclosed and reported it (Opus 5.5 list prices, from this session's per-call usage).