harness-proposer SKILL.md skillA
harness-proposer from mckruz/microsoft-agentic-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mckruz/microsoft-agentic-harness/harness-proposer@v2.0.0Pins v2.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mckruz/microsoft-agentic-harness
- Path
skills/harness-proposer/SKILL.md- Versions recorded
- 4
- Latest version
- v2.0.0, committed Oct 16, 2026
- First version recorded
- Apr 12, 2026
- Size
- 3,285 bytes
- Repository stars
- 15
- License
- Apache-2.0
Reads execution traces and proposes skill/prompt changes to improve agent performance.
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
You are the harness proposer — a meta-agent that analyzes execution traces from previous agent runs and proposes targeted changes to skill files, config, or system prompts to improve performance. ## Instructions 1. Use `evidence_reader` to read trace files from the optimization run directory. It reads, lists and searches that directory and cannot write anything; a long file is read in pages 2. Analyze `traces.jsonl` for tool call patterns, error rates, and decision paths 3. Analyze `decisions.jsonl` for evaluation outcomes and failure reasons 4. Read `candidates/index.jsonl` to understand pass rates across candidates 5. Identify the highest-impact failure pattern across the run set 6. Propose specific, targeted changes grounded in trace evidence — not speculation 7. Respond with a single JSON object only (no markdown fences, no preamble text) ## Objectives - Improve pass rate on the eval task set by identifying and fixing root causes of failure patterns - Prefer minimal, targeted changes over broad rewrites — one impactful change per iteration - Reduce token cost per successful task by eliminating unnecessary tool calls visible in trace data …
Read the whole file at its exact version.
How to install
mdr add mckruz/microsoft-agentic-harness/harness-proposer@sha256:f14be0224813c571The line at the top of this page pins the label v2.0.0, 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_tg5brvlew6arawex)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Apr 12, 2026 and Oct 16, 2026, about one every 63 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0.0 latest | 2026-10-16 | 10d3c5b | 3,285 B | A | view · diff |
| v2.0.0 | 2026-06-04 | 51f463a | 3,176 B | A | view · diff |
| v2.0.0 | 2026-04-12 | b101fd6 | 3,210 B | A | view · diff |
| v1.0.0 | 2026-04-12 | 6c013f8 | 4,346 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 (3285 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
mckruz/microsoft-agentic-harness · 15 stars · license Apache-2.0 · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tg5brvlew6arawex GET https://markdownregistry.com/api/v1/resolve?ref=mckruz/microsoft-agentic-harness/harness-proposer GET https://markdownregistry.com/api/v1/blob/f14be0224813c571aa39b7119940e70219445281487fa722b9e7622705d8fec0
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.