small-model-regression-eval

small-model-regression-eval is a skill for Claude Code, Codex from Firstp1ck/pi-coding-agent-forge. It costs 40 tokens per session (637 once invoked), scanned A, original, MIT.

A plan for comparing fixed tasks across small language models or changes to their prompts, settings, or safeguards. It separates automatic checks from results that require actually running a model.

In plain words
What is it for?
It helps evaluate a model or configuration against held-out tasks, check whether a revision caused regressions, and design baseline-versus-current evaluation runs.
Why use it?
It prevents claims about live model quality when no run occurred and avoids confusing a model change with a workflow change. Frozen tasks and independent expected results make comparisons repeatable.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It helps evaluate a model or configuration against held-out tasks, check whether a revision caused regressions, and design baseline-versus-current evaluation runs.

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Install with agentmods
npx agentmods add skills/firstp1ck/pi-coding-agent-forge/small-model-regression-eval
Install

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.

Any agent
npx skills add Firstp1ck/pi-coding-agent-forge --skill small-model-regression-eval
Clone the repo
git clone --depth 1 https://github.com/Firstp1ck/pi-coding-agent-forge

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for small-model-regression-eval

README.md
[![agentmods](https://agentmods.dev/badge/skills/firstp1ck/pi-coding-agent-forge/small-model-regression-eval/github.svg)](https://agentmods.dev/skills/firstp1ck/pi-coding-agent-forge/small-model-regression-eval)
Your own site
<a href="https://agentmods.dev/skills/firstp1ck/pi-coding-agent-forge/small-model-regression-eval"><img src="https://agentmods.dev/badge/skills/firstp1ck/pi-coding-agent-forge/small-model-regression-eval/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.

agentmods 80×15 button for small-model-regression-eval

Your own site · 80×15
<a href="https://agentmods.dev/skills/firstp1ck/pi-coding-agent-forge/small-model-regression-eval"><img src="https://agentmods.dev/badge/skills/firstp1ck/pi-coding-agent-forge/small-model-regression-eval.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 637 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00040 $0.00637
Opus 5.5 $0.00016 $0.00255
Sonnet 5.5 $0.00008 $0.00127
Haiku 4.5 $0.00004 $0.00064

Measured 1mo ago against content hash afaf16628d3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

small-model-regression-eval 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 1mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (tests/test_skill_contract.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

pi-extension-small-modal-reliability/skills/small-model-regression-eval/SKILL.md · 52 lines

How it starts

The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Small-model regression evaluation

Use this skill to compare a model, quantization, prompt, guard profile, or skill revision against frozen independent outcomes. It separates deterministic mechanism tests from live model quality results.

When to use

Should trigger

  • “Compare this configured local model with the guarded workflow on held-out tasks.”
  • “Report whether a reliability revision regressed retrieval, agentic, or coding fixtures.”
  • “Create a baseline-versus-integrated evaluation plan without making live calls.”

Should not trigger

  • “Implement this feature.”
  • “Use a model to solve the current task.”
  • “Publish or enable a model.”

Inputs

Provide a frozen task suite, independent expected outcomes, exact provider/model ID, quantization and sampling settings when applicable, package revision, guard profile, tool configuration, timeout, sample budget, and whether assisted mode is separately authorized.

Portable workflow

  1. Freeze sanitized task inputs and independent success checks before tuning.
  2. Run deterministic guard fixtures separately from model executions.
  3. Compare baseline, current extension, isolated feature, integrated guarded, and separately authorized assisted configurations.
  4. Keep assisted results in their own column; do not combine them with small-model-only scores.
  5. Record exact model/provider identity and all execution settings for every live run.
  6. Report unavailable live evaluation truthfully instead of substituting a model, provider, or adapter.

Safety and reporting boundary

Do not use the extension completion gate as the evaluation oracle. Do not make network or provider calls merely because a model name was supplied. Never claim an improvement from fixtures, mechanism tests, or unrun configurations.

Verification

Verify that each actual task outcome is checked by an independent oracle, frozen inputs remain unchanged, configuration identity is complete, failures are retained, and unavailable live execution records zero calls with a reason.

Read the full file on GitHub · 52 lines

Files

What ships with it

2 files 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.

Changes

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.

  1. 1mo ago First seen · 52 lines · 40 tokens per session scan A afaf16628d3d

Subscribe to this mod's changes

small-model-regression-eval is a skill published in the GitHub repository Firstp1ck/pi-coding-agent-forge (91 stars, last pushed today), licensed MIT. It adds 40 tokens to every session and 637 once invoked, about $0.0002 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 2026-09-14.