Make every number in the final PDF traceable to the exact code line that produced it. Uses \hypertarget/\hyperlink LaTeX commands and \num{formula} evaluated at compile time. Use for reproducibility and data integrity verification.

Backward Traceability Make every number in the final PDF hyperlink back to the exact code line that produced it. Input $0 — Paper project directory containing code and LaTeX files References Traceability patterns and LaTeX commands: ~/.claude/skills/backward traceability/references/traceability patterns.md Scripts Scan hypertarget/hyperlink references Reports: all hypertargets, hyperlinks, orphan references, unreferenced numeric values. Verify cross reference integrity Cross checks values between paper text and code output. Reports mismatches. Workflow Step 1: Tag Code Outputs For every numeric value produced by experiment code, add hypertarget tags: Label format: {prefix}{line number}{letter} where letter = a, b, c... for multiple values on same line. Step 2: Reference in Paper Text Use \hyperlink to create clickable references in the paper: Step 3: Use \num for Computed Values For values derived from other values, use \num{} for compile time evaluation: Step 4: Generate Appendix Code Listing Create an appendix with the full code listing, with \hypertarget anchors at relevant lines: Step 5: Verify Traceability Every number in the paper text must have a corresponding \hypertarget in the code Every \num{} formula must evaluate correctly Click test: every hyperlink in the PDF must jump to the correct code line LaTeX Setup Required packages: Rules Every numeric result in the paper MUST trace to code output Never manually type numbers — always reference tagged outputs Use \num{} for any derived/computed values Code listing in appendix must match actual executed code Verify all hyperlinks resolve correctly after compilation Related Skills Upstream: [experiment code](../experiment code/), [data analysis](../data analysis/) Downstream: [paper compilation](../paper compilation/) See also: [paper assembly](../paper assembly/)

backward-traceability