Borrowing it
Nothing to install: this file belongs to sabbour/agentweaver. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/sabbour/agentweaver/dev/.github/skills/agentweaver-mcp-harness/SKILL.mdgit clone --depth 1 https://github.com/sabbour/agentweaverWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/sabbour/agentweaver/agentweaver-mcp-harness)<a href="https://agentmods.dev/skills/sabbour/agentweaver/agentweaver-mcp-harness"><img src="https://agentmods.dev/badge/skills/sabbour/agentweaver/agentweaver-mcp-harness/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/sabbour/agentweaver/agentweaver-mcp-harness"><img src="https://agentmods.dev/badge/skills/sabbour/agentweaver/agentweaver-mcp-harness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00048 | $0.00266 |
| Opus 5 | $0.00024 | $0.00133 |
| Sonnet 5 | $0.00010 | $0.00053 |
| Haiku 4.5 | $0.00005 | $0.00027 |
Grade A, and why
agentweaver-mcp-harness scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
MCP harness
Use for MCP end-to-end validation, MCP tool-contract regression checks, and
investigating issues reported through the Agentweaver MCP surface. Follow the
detailed contract in scripts/mcp-harness/SKILL.md; run its implemented CLI
instead of manually recreating its discovery, capability checks, or smoke flow.
That contract now includes --list for the reviewed built-in MCP catalog. Use the
separate harness-scenarios skill for cross-surface cataloging and persona generation.
Before running, check scripts/harness-shared/learnings.md (surface: mcp or all)
for already-known bugs, environment facts, and scenario-design notes so they aren't
rediscovered from source each run.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 23 lines · 48 tokens per session scan A aabaa78dc50b
agentweaver-mcp-harness is a skill published in the GitHub repository sabbour/agentweaver (5 stars, last pushed today), licensed MIT. It adds 48 tokens to every session and 266 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
verify
Exercise the real app/API/CLI and collect observable evidence; tests alone do not count as end-to-end verification.
webapp-testing
Start/reuse a local app, wait for readiness, inspect rendered state/console/network, act from observed selectors, and verify with evidence.
qa
Browser-based QA verification. Launches a real browser, navigates the app, clicks buttons, fills forms, and tests user flows. Works as a standalone skill or as a phase end condition in campaigns. Requires Playwright (optional dependency, graceful skip if not installed).
live-preview
Mid-build visual verification loop. Takes screenshots of components during construction, not just after. Catches visual regressions and invisible features before they compound. Requires Playwright or similar screenshot tool.
product-test
Use this skill to define the observable behavior that must be true for a story or feature to be considered done. It turns product context into concise, testable Given/When/Then scenarios that engineers and QA can verify without guessing intent.
test-automation
Execute Vitest and Playwright test suites with result collection and failure analysis.