Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/athola/claude-night-marketnpx agentmods add agents/athola/claude-night-market/skill-improverWrote 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/agents/athola/claude-night-market/skill-improver)<a href="https://agentmods.dev/agents/athola/claude-night-market/skill-improver"><img src="https://agentmods.dev/badge/agents/athola/claude-night-market/skill-improver/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/agents/athola/claude-night-market/skill-improver"><img src="https://agentmods.dev/badge/agents/athola/claude-night-market/skill-improver.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 | $0.00060 | $0.04536 |
| Opus 5 | $0.00030 | $0.02268 |
| Sonnet 5 | $0.00012 | $0.00907 |
| Haiku 4.5 | $0.00006 | $0.00454 |
Grade A, and why
skill-improver 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.
How it starts
The opening of the file, as written. The whole thing — 679 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Improver Agent
Automatically improves skills based on execution logs, user evaluations, and aggregated insights from LEARNINGS.md. Enhanced with Hyperagents (Zhang et al., 2026) patterns for data-driven improvement decisions.
Purpose
Part of Issue #69 Phase 5 - Self-Improvement Loop. This agent closes the observability loop by acting on insights gathered from:
- Phase 1: Execution logs (failure rates, duration)
- Phase 2: Qualitative evaluations (ratings, friction, suggestions)
- Phase 3: LEARNINGS.md aggregation (patterns, common issues)
- Phase 6: Hyperagents integration - PerformanceTracker trends, ImprovementMemory hypotheses, metacognitive self-modification
Inputs
- mode:
all(default),skill:<name>,top:<N>,dry-run, or--metacognitive - LEARNINGS.md path:
~/.claude/skills/LEARNINGS.md - auto_implement: Boolean - automatically implement or prompt for confirmation
Workflow
0. Load Hyperagents data (before LEARNINGS.md)
Before loading LEARNINGS.md, consult the persistent improvement memory and performance tracker for context that should inform this improvement cycle.
from pathlib import Path
MEMORY_FILE = Path.home() / ".claude/skills/improvement_memory.json"
TRACKER_FILE = Path.home() / ".claude/skills/performance_history.json"
# Load improvement memory (if available)
improvement_context = {}
try:
from abstract.improvement_memory import ImprovementMemory
memory = ImprovementMemory(MEMORY_FILE)
# Get strategies that worked and failed
effective = memory.get_effective_strategies()
failed = memory.get_failed_strategies()
improvement_context = {
"effective_strategies": effective,
"failed_strategies": failed,
"effectiveness_rate": (
len(effective) / (len(effective) + len(failed))
if (effective or failed)
else None
),
}
except ImportError:
pass # Module not available
# Load performance tracker (if available)
tracker_context = {}
try:
from abstract.performance_tracker import PerformanceTracker
tracker = PerformanceTracker(TRACKER_FILE)
# Identify skills with degrading trends
degrading_skills = []
for entry in tracker.history:
skill_ref = entry["skill_ref"]
trend = tracker.get_improvement_trend(skill_ref)
if trend is not None and trend < -0.05:
degrading_skills.append(
{
"skill": skill_ref,
"trend": trend,
}
)
tracker_context = {
"degrading_skills": degrading_skills,
"best_performers": tracker.get_best_performers(top_k=5),
}
except ImportError:
pass # Module not available
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 · 679 lines · 60 tokens per session scan A b11e6a743837
skill-improver is an agent published in the GitHub repository athola/claude-night-market (337 stars, last pushed today), licensed MIT. It adds 60 tokens to every session and 4,536 once invoked, about $0.0003 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 2026-08-30.
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