lore

lore is a skill for Claude Code, Codex from simota/agent-skills. It costs 40 tokens per session (5,223 once invoked), scanned A, original, MIT.

A curator for shared knowledge built from coding-agent journals, postmortems, and repair logs. It records reusable patterns in METAPATTERNS.md and watches for knowledge that has become outdated.

In plain words
What is it for?
Use it to extract recurring lessons, detect knowledge decay, prune obsolete patterns, and distribute trusted guidance to agents.
Why use it?
It helps an organization remember useful lessons, remove invalid advice, and share relevant practices with other agents.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents; installed under .agents/ (shared by several agents).

Good fit Use it to extract recurring lessons, detect knowledge decay, prune obsolete patterns, and distribute trusted guidance to agents.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/simota/agent-skills/lore
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 simota/agent-skills --skill lore
Clone the repo
git clone --depth 1 https://github.com/simota/agent-skills

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 lore

README.md
[![agentmods](https://agentmods.dev/badge/skills/simota/agent-skills/lore/github.svg)](https://agentmods.dev/skills/simota/agent-skills/lore)
Your own site
<a href="https://agentmods.dev/skills/simota/agent-skills/lore"><img src="https://agentmods.dev/badge/skills/simota/agent-skills/lore/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 lore

Your own site · 80×15
<a href="https://agentmods.dev/skills/simota/agent-skills/lore"><img src="https://agentmods.dev/badge/skills/simota/agent-skills/lore.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 5,223 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 6
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
  • high Rogue Agent · line 40
    Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.
    Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
How audits are shown
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 $0.05223
Opus 5.5 $0.00016 $0.02089
Sonnet 5.5 $0.00008 $0.01045
Haiku 4.5 $0.00004 $0.00522

Measured 2d ago against content hash 13f281cb6133, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

lore 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 2d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • lore — 98% identical, 61 lines differ
.agents/skills/lore/SKILL.md · 302 lines

How it starts

The opening of the file, as written. The whole thing — 302 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Lore

Cross-agent knowledge curator and institutional memory guardian. Lore reads agent journals, postmortems, and remediation logs; synthesizes reusable patterns; maintains METAPATTERNS.md; prevents organizational forgetting through freshness scoring, proactive validity scheduling, and decay detection; performs organizational unlearning (strategic pruning of invalidated patterns) to prevent outdated knowledge from blocking new pattern absorption; and propagates relevant insights to consuming agents. Lore does not write code, edit SKILL files, make evolution decisions, or execute remediation.


Read the full file on GitHub · 302 lines

Files

What ships with it

7 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. 2d ago Changed 13f281cb6133
  2. 8d ago Changed · -1 lines 7b69355d713b
  3. 1mo ago Changed · -1 lines c1755bd79ca4
  4. 1mo ago First seen · 304 lines · 40 tokens per session scan A 588da9acddd6

Subscribe to this mod's changes

lore is a skill published in the GitHub repository simota/agent-skills (93 stars, last pushed yesterday), licensed MIT. It adds 40 tokens to every session and 5,223 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 2026-08-30.