harness-binary-spelunking SKILL.md skillA
harness-binary-spelunking from technicalpickles/pickled-claude-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add technicalpickles/pickled-claude-plugins/harness-binary-spelunking@git:20260820.f29e5a0Pins git:20260820.f29e5a0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- technicalpickles/pickled-claude-plugins
- Path
plugins/agent-meta/skills/harness-binary-spelunking/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260820.f29e5a0, committed Aug 20, 2026
- First version recorded
- Jul 6, 2026
- Size
- 13,124 bytes
- Repository stars
- 12
- License
- MIT
Use when investigating an agent-harness CLI's internals (Claude Code, codex, opencode, or similar): extracting the system prompt or tool descriptions, finding what code path produces a specific UI message, decoding minified function names or Rust symbols, understanding undocumented config keys, or otherwise spelunking a shipped binary (or its pinned source) to figure out how the tool actually behaves.
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
# Harness Binary Spelunking "The harness" here means whatever agent CLI you're inspecting: Claude Code, codex, opencode, pi, or any other tool that wraps an LLM in a terminal loop. The technique is the same regardless of which one you're looking at; only the recipes fork, based on how the binary was built. ## Step 0: Decide your approach Before grepping anything, figure out which situation you're in: - **Open source, and the pinned version is tagged?** Clone the source at that exact tag and read it. Fastest, most readable, no guessing at minified names. See [references/source-clone.md](references/source-clone.md). - **Closed source (Claude Code today), or you want ground truth of what actually shipped?** Spelunk the binary directly. Source, even when it exists, is what was *committed*; the binary is what's *running* on your machine right now. - **Open source but the version isn't tagged yet, or you're debugging a discrepancy between source and behavior?** Spelunk the binary even though source exists. "Open source" doesn't mean "skip verification." …
Read the whole file at its exact version.
How to install
mdr add technicalpickles/pickled-claude-plugins/harness-binary-spelunking@sha256:9e34929c00f61452The line at the top of this page pins the label git:20260820.f29e5a0, 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_6ds3ve3slsashe56)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 6, 2026 and Aug 20, 2026, about one every 45 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260820.f29e5a0 latest | 2026-08-20 | f29e5a0 | 13,124 B | A | view · diff |
| git:20260706.4311a63 | 2026-07-06 | 4311a63 | 10,325 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 (13124 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
technicalpickles/pickled-claude-plugins · 12 stars · license MIT · pushed 2026-10-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6ds3ve3slsashe56 GET https://markdownregistry.com/api/v1/resolve?ref=technicalpickles/pickled-claude-plugins/harness-binary-spelunking GET https://markdownregistry.com/api/v1/blob/9e34929c00f61452ece4135c4ee7e61d76cb7adf62476c9c9250c2a42945c685
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.