When a test should be green but stays red, or a self-check command fails during Trellis subtask implementation/verification, use this non-deviable rigid script for systematic root-cause pinpointing and minimal fix. Used when Codex / Claude Code drives a small-parameter model like qwen3.6 35b—small models quickly spiral out of control when debugging freely; this skill uses "one change at a time, must re-run after change, no guessing" iron rules to lock it on a narrow path with defensive regression checks.
$npx -y skills add coldwateryi/trellis-skills --skill trellis-debug-systematicInstalls into the current project.
Run `npx skills use "https://github.com/coldwateryi/trellis-skills" --skill "coldwateryi/trellis-skills/trellis-debug-systematic"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/coldwateryi/trellis-skills" that are relevant to the current task. Run `npx skills add "https://github.com/coldwateryi/trellis-skills"` and select the relevant skills, then follow their instructions.