Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add harness/harness-skills --skill review-experiment-resultsgit clone --depth 1 https://github.com/harness/harness-skillsWrote 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/harness/harness-skills/review-experiment-results)<a href="https://agentmods.dev/skills/harness/harness-skills/review-experiment-results"><img src="https://agentmods.dev/badge/skills/harness/harness-skills/review-experiment-results/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/harness/harness-skills/review-experiment-results"><img src="https://agentmods.dev/badge/skills/harness/harness-skills/review-experiment-results.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 | $0.00167 | $0.03758 |
| Opus 5.5 | $0.00067 | $0.01503 |
| Sonnet 5.5 | $0.00033 | $0.00752 |
| Haiku 4.5 | $0.00017 | $0.00376 |
Grade A, and why
review-experiment-results 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Review Experiment Results
Explain an FME experiment's outcome in plain language: whether there's a winner, why or why not, how guardrail metrics were affected, and any data-quality caveats - with underlying statistics available on request.
Related: manage-experiments (experiment changes), choose-metric (metric selection).
Tools
Works through the Harness MCP server or the Harness CLI; names are from tool-map.md.
| Operation | MCP | CLI |
|---|---|---|
| List experiments | harness_list · fme_experiment · filters: { parent_type, name?, match_type: "contains", status?: ["ACTIVE", "PAUSED", "COMPLETED", "ARCHIVED"], offset: 0, limit: 100 } · compact: false |
harness list experiment --parent-type FEATURE_FLAG [--search <name>] --status ACTIVE, then repeat with --status PAUSED, --status COMPLETED, --status ARCHIVED (CLI --status is single-value; API defaults to ACTIVE if omitted) |
| Get experiment | harness_get · fme_experiment · params: { experiment_id } |
harness get experiment <experiment-id> |
| Get settings | harness_get · fme_experiment_settings · params: { experiment_id } |
harness get experiment:settings <experiment-id> |
| List results | harness_list · fme_experiment_result · filters: { experiment_id, comparisons? } |
harness list experiment:results <experiment-id> --raw |
| Get/list metrics | harness_get · fme_metric · params.metric_id (one call per id), or harness_list · fme_metric · filters: { ids } · compact: false |
harness get metric <id> once per id, or harness list metric --id <id> once per id - the CLI's --id flag is repeatable but only the first value reaches the API (spec bug), so repeating --id id1 --id id2 on one call silently drops id2 |
Instructions
Phase 1: Establish scope
Follow scope-establishment.md.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- yesterday Changed · +1 lines 5cf35d467cb2
- 9d ago First seen · 177 lines · 167 tokens per session scan A 3585347d53b1
review-experiment-results is a skill published in the GitHub repository harness/harness-skills (117 stars, last pushed yesterday), licensed Apache-2.0. It adds 167 tokens to every session and 3,758 once invoked, about $0.0007 per session on Opus 5.5. 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 2026-10-07.
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