agent-harness-design SKILL.md skillA
agent-harness-design from yeaight7/agent-powerups is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yeaight7/agent-powerups/agent-harness-design@git:20260606.a592844Pins git:20260606.a592844 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yeaight7/agent-powerups
- Path
plugins/dev-vitals/skills/agent-harness-design/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260606.a592844, committed Jun 6, 2026
- First version recorded
- May 3, 2026
- Size
- 2,232 bytes
- Repository stars
- 8
- License
- Apache-2.0
Use when designing tool definitions for a new agent or subagent, an agent shows high retry rates, ambiguous tool invocations, or silent failures, or an existing agent harness needs a quality review.
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
# Agent Harness Design Use when designing or improving how an agent invokes tools, handles errors, and decides when to stop. ## Tool Design Rules - **Names**: explicit and stable (`read_file`, `run_tests`); no generic names (`do_action`, `execute`) - **Schemas**: required fields only; enum values for modes; reject invalid input with a clear error - **Output**: always include `status` (success/warning/error), `summary`, `next_actions`, `artifacts` - **Catch-all tools**: avoid `run_bash`/`shell_exec` unless task is genuinely open-ended; add allowlist ## Error Path Rules | Case | Required response | |------|------------------| | Invalid input | Reject immediately with exact field name | | Transient failure | Include `retry_after` hint and idempotency note | | Non-recoverable | Set `stop: true`, describe manual resolution | ## Retry and Stop Conditions Define in harness, not inside tools: - Max retries: 2 - Hard stops: `status: "error"` with `stop: true`; same inputs called twice in a row ## Granularity Guide | Risk | Granularity | |------|------------| | High (deploy, migrate, permissions) | Micro — one action, explicit confirmation | …
Read the whole file at its exact version.
How to install
mdr add yeaight7/agent-powerups/agent-harness-design@sha256:97f95d471ee1815aThe line at the top of this page pins the label git:20260606.a592844, 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_hwyll47pqof2h7tf)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 3, 2026 and Jun 6, 2026, about one every 34 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260606.a592844 latest | 2026-06-06 | a592844 | 2,232 B | A | view · diff |
| git:20260503.d3d0e5b | 2026-05-03 | d3d0e5b | 1,618 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 (2232 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
yeaight7/agent-powerups · 8 stars · license Apache-2.0 · pushed 2026-09-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hwyll47pqof2h7tf GET https://markdownregistry.com/api/v1/resolve?ref=yeaight7/agent-powerups/agent-harness-design GET https://markdownregistry.com/api/v1/blob/97f95d471ee1815af0441a762e53d6f6a95800c70ed5d0114b5c552d70f0c784
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.
More from yeaight7/agent-powerups
Every file in yeaight7/agent-powerups