Individual skill
genomic-coordinates
Converts genomic intervals between coordinate conventions, normalises and compares variant representations, and detects assembly or contig-naming mismatches before they corrupt an analysis. Used whenever coordinates cross a format, tool, or assembly boundary - converting between BED, GFF/GTF, VCF, SAM/BAM, WIG, PSL, genePred, Picard interval_list, or region strings; reconciling 0-based half-open with 1-based inclusive; left-aligning or trimming indels; checking whether two variant records describe the same change; mapping genomic to transcript, CDS, or protein positions; auditing a BED/GTF/VCF for convention violations; or diagnosing GRCh37 vs hg19 vs GRCh38 vs T2T, chr-prefix, and liftover problems. Triggers include "off by one", "0-based", "1-based", "half-open", "coordinate system", "left-align", "normalize variant", "bcftools norm", "chr prefix", "wrong genome build", "liftover", "REF mismatch", and "HGVS".
skills/genomic-coordinates/SKILL.md
Source commit 2d2065fb4520fa3f3f2bcf61cff26ec8b7eba4b5
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- Yes
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Network or broad shell
- Last checked
- Nov 10, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
Install this skill
Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.
An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.
Repository context
- Repository stars (not skill ratings)
- 56,727
- Repository last updated
- Nov 9, 2026
- License
- MIT
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai-scientist Repository topic
- bioinformatics Repository topic
- chemoinformatics Repository topic
- claude Repository topic
- claude-skills Repository topic
- claudecode Repository topic
- clinical-research Repository topic
- computational-biology Repository topic
- data-analysis Repository topic
- drug-discovery Repository topic
- engineering Derived category
Files and excerpt
File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.
Browse files
SKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesSKILL.mdcore · 12,764 bytesreferences/format-conventions.mddoc · 12,325 bytesreferences/reference-builds.mddoc · 7,993 bytesreferences/transcript-coordinates.mddoc · 8,385 bytesreferences/variant-representation.mddoc · 8,103 bytesscripts/_common.pyruns · 14,742 bytesscripts/audit_intervals.pyruns · 21,201 bytesscripts/check_contigs.pyruns · 17,205 bytesscripts/convert_coords.pyruns · 7,609 bytesscripts/normalize_variant.pyruns · 11,307 bytes
Read excerpt
# Genomic Coordinates
## When to use
Any time a coordinate crosses a boundary: between two file formats, between two
tools, between two assemblies, or between the genome and a transcript.
## The rule
**A coordinate is three facts, not one: the number, the convention it is written
in, and the assembly it was measured against.** Carry all three or the number is
not interpretable.
Coordinate errors are the quietest class of bug in genomics. An off-by-one BED