concept-compare

A source-based comparison tool for explaining how two concepts, theories, methods, or terms are alike and different. It uses a local knowledge base and marks comparisons as a synthesis when the sources discuss the concepts separately.

In plain words
What is it for?
Use it for study comparisons, theory or method differences, terminology questions, and compact comparison tables grounded in your documents.
Why use it?
It helps resolve confusing terminology without presenting unsupported distinctions as facts. It also keeps similarities, differences, and common misunderstandings together.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/ctrlcakepro/chilon-recall/concept-compare
Any agent
npx skills add ctrlcakepro/chilon-recall --skill concept-compare
Clone the repo
git clone --depth 1 https://github.com/ctrlcakepro/chilon-recall

Made for: Claude Code, Codex.

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 127 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00048 $0.00127
Opus 5 $0.00024 $0.00063
Sonnet 5 $0.00010 $0.00025
Haiku 4.5 $0.00005 $0.00013

Measured yesterday against content hash 51e8d933539a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

concept-compare 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.

skills/concept-compare/SKILL.md · 14 lines

What it actually says

Concept Compare

  1. Call concept_compare with both concepts and any requested comparison dimensions.
  2. Build a compact comparison table from the returned evidence.
  3. Explain similarities, differences, relationships, and common confusions.
  4. If sources discuss the concepts separately, label the comparison as a synthesis.
  5. Keep unsupported distinctions and external commentary clearly separate.
Files

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.

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. yesterday First seen · 14 lines · 48 tokens per session scan A 51e8d933539a

Subscribe to this mod's changes

concept-compare is a skill published in the GitHub repository ctrlcakepro/chilon-recall (1 stars, last pushed 2d ago), licensed MIT. It adds 48 tokens to every session and 127 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.

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