investigate SKILL.md skillA
investigate from testdouble/han is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add testdouble/han/investigate@git:20260915.ec2cb7cPins git:20260915.ec2cb7c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- testdouble/han
- Path
han-coding/skills/investigate/SKILL.md- Versions recorded
- 6
- Latest version
- git:20260915.ec2cb7c, committed Sep 15, 2026
- First version recorded
- Jul 30, 2026
- Size
- 12,195 bytes
- Repository stars
- 334
- License
- MIT
Evidence-based investigation of issues, bugs, API calls, integrations, and other aspects of software development that need a deep dive to find the root cause and solutions. Use when you need to debug, troubleshoot, diagnose, or figure out why something is broken. Does not review code for quality or style — use code-review for auditing changes or post-code-review-to-pr for posting review feedback to GitHub. Does not assess architectural health or structural risk — use architectural-analysis for…
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
## Project Context
- CLAUDE.md: !`find . -maxdepth 1 -name "CLAUDE.md" -type f`
- project-discovery.md: !`find . -maxdepth 3 -name "project-discovery.md" -type f`
- personal config directory: !`bash "${CLAUDE_PLUGIN_ROOT}/scripts/han-config-dir.sh" 2>/dev/null || echo "$HOME/.claude"`
- project .han/config.md: !`cat .han/config.md 2>/dev/null || echo ""`
As your first action, use the Read tool on `.han/config.md` inside the `personal config directory` path above. A read
that returns no file is no personal configuration: continue silently. When that file or the `project .han/config.md`
probe supplies content, apply it per [config-rule.md](../../references/config-rule.md), which governs precedence
between the two files, relative-path resolution, and what to do with a file that reads but cannot be used.
## Investigation Approach
- Trace backward from symptoms — don't guess, follow the code.
- Launch parallel `han-core:evidence-based-investigator` agents for different angles simultaneously — one for the error
path, one for the data flow, one for recent changes.
- Add one or more specialist analysts **in parallel with** the investigators when the bug type calls for it
…Read the whole file at its exact version.
How to install
mdr add testdouble/han/investigate@sha256:76009c47a5415863The line at the top of this page pins the label git:20260915.ec2cb7c, 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.
[](https://markdownregistry.com/a/art_w66dqp46d2lekhvw)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Jul 30, 2026 and Sep 15, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260915.ec2cb7c latest | 2026-09-15 | ec2cb7c | 12,195 B | A | view · diff |
| git:20260819.cdb751e | 2026-08-19 | cdb751e | 12,038 B | A | view · diff |
| git:20260818.55bdb1d | 2026-08-18 | 55bdb1d | 11,975 B | A | view · diff |
| git:20260731.e79299f | 2026-07-31 | e79299f | 11,865 B | A | view · diff |
| git:20260731.d95412f | 2026-07-31 | d95412f | 12,070 B | A | view · diff |
| git:20260730.78dc4f8 | 2026-07-30 | 78dc4f8 | 12,426 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12195 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
testdouble/han · 334 stars · license MIT · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_w66dqp46d2lekhvw GET https://markdownregistry.com/api/v1/resolve?ref=testdouble/han/investigate GET https://markdownregistry.com/api/v1/blob/76009c47a54158634db0eb2bf0af3a98bd606006981c51b3d487ab3d3dec8271
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.