trail SKILL.md skillA

trail from simota/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add simota/agent-skills/trail@git:20261014.350ad2b

Pins git:20261014.350ad2b in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: simota/agent-skills
Path: trail/SKILL.md
Versions recorded: 11
Latest version: git:20261014.350ad2b, committed Oct 14, 2026
First version recorded: Aug 18, 2026
Size: 23,639 bytes
Repository stars: 99
License: MIT

Investigating git history, analyzing regression root causes, and performing code archaeology. Time-travels through commits to uncover truth. Use for git history investigation.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

<!--
CAPABILITIES_SUMMARY:
- git_bisect_automation: Automated regression detection via git bisect with test verification
- regression_root_cause_analysis: Pinpoint breaking commits with context and timeline
- code_archaeology: Trace evolution of code decisions via blame, log, and follow
- change_impact_timeline: Visualize how code evolved over time
- blame_analysis: Understand who changed what and why (focus on commits, not individuals)
- historical_pattern_detection: Find recurring issues and failure patterns in git history
- commit_relationship_mapping: Understand change dependencies and causal chains
- non_functional_regression_investigation: Benchmark-driven bisect for performance, memory, bundle size, and startup time regressions
- ai_commit_archaeology: Detection and interpretation of AI-coauthored commits in blame/log/archaeology workflows
- benchmark_driven_bisect: Custom bisect terms and automated scripts for non-binary pass/fail regression detection
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add simota/agent-skills/trail@sha256:e1faa47fc61674b6

The line at the top of this page pins the label git:20261014.350ad2b, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_z6n2qurfswh2ecca.svg)](https://markdownregistry.com/a/art_z6n2qurfswh2ecca)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 11 versions of this file, between Aug 18, 2026 and Oct 14, 2026, about one every 6 days.

version	committed	commit	size	audit
git:20261014.350ad2b latest	2026-10-14	350ad2b	23,639 B	A	view · diff
git:20261012.27f6d8a	2026-10-12	27f6d8a	23,555 B	A	view · diff
git:20261009.1e21383	2026-10-09	1e21383	23,647 B	A	view · diff
git:20260918.e307415	2026-09-18	e307415	23,374 B	A	view · diff
git:20260917.c805268	2026-09-17	c805268	23,808 B	A	view · diff
git:20260916.35ffd55	2026-09-16	35ffd55	23,830 B	A	view · diff
git:20260820.4d4eeea	2026-08-20	4d4eeea	24,066 B	A	view · diff
git:20260820.9805aa1	2026-08-20	9805aa1	24,043 B	A	view · diff
git:20260819.95d6993	2026-08-19	95d6993	23,789 B	A	view · diff
git:20260819.f2c9e0a	2026-08-19	f2c9e0a	24,084 B	A	view · diff
git:20260818.8e1f365	2026-08-18	8e1f365	24,076 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (23639 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

simota/agent-skills · 99 stars · license MIT · pushed 2026-10-26 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_z6n2qurfswh2ecca
GET https://markdownregistry.com/api/v1/resolve?ref=simota/agent-skills/trail
GET https://markdownregistry.com/api/v1/blob/e1faa47fc61674b6a8a8e6a9b6f940a674c481a87c9993d772d1a54d3752b144

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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git:20261014.86e932e · audit A · 99 stars

lore SKILL.md skill

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