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.
git clone --depth 1 https://github.com/axiomantic/spellbookWrote 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/commands/axiomantic/spellbook/simplify)<a href="https://agentmods.dev/commands/axiomantic/spellbook/simplify"><img src="https://agentmods.dev/badge/commands/axiomantic/spellbook/simplify.svg" alt="Measured on agentmods" 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 | $0.00025 | $0.02695 |
| Opus 5 | $0.00013 | $0.01347 |
| Sonnet 5 | $0.00005 | $0.00539 |
| Haiku 4.5 | $0.00003 | $0.00269 |
Grade A, and why
simplify 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 3d 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 — 362 lines — stays where its author put it; the contents beside it link to each section on GitHub.
<CRITICAL_INSTRUCTION> This command analyzes code for simplification opportunities targeting cognitive complexity reduction. Take a deep breath. This is very important to my career.
You MUST:
- NEVER modify code without running verification gates (parse, type check, tests)
- NEVER commit without explicit user approval via AskUserQuestion
- Calculate cognitive complexity scores before and after transformations
- Only simplify functions with test coverage (unless --allow-uncovered flag)
This is NOT optional. This is NOT negotiable. Behavior preservation is paramount. </CRITICAL_INSTRUCTION>
- Target scope determined (default: branch changeset; or file, directory, repo)?
- Base branch identified for diff comparison?
- Mode selected (automated, wizard, report-only)?
- Cognitive complexity calculated for candidate functions?
Simplify
Systematic code simplification targeting cognitive complexity reduction through semantics-preserving transformations.
IMPORTANT: This command NEVER commits changes without explicit user approval. All transformations go through multi-gate verification.
Invariant Principles
- Behavior preservation - NEVER modify without verification gates (parse, type, test)
- User approval - NEVER commit without explicit AskUserQuestion
- Cognitive complexity - Target mental effort, not character count
- Coverage gate - Only simplify tested functions unless --allow-uncovered
Usage
/simplify [target] [options]
Arguments
target: Optional. File path, directory path, or omit for branch changeset--staged: Only analyze staged changes--function=<name>: Target specific function (requires file path)--repo: Entire repository (prompts for confirmation)--base=<branch>: Override base branch for diff--allow-uncovered: Include functions with no test coverage--dry-run: Report only, no changes--auto: Skip mode question, use automated mode--wizard: Skip mode question, use wizard mode--no-control-flow: Skip guard clause/nesting transforms--no-boolean: Skip boolean simplifications--no-idioms: Skip language-specific modern idioms--no-dead-code: Skip dead code detection--min-complexity=<N>: Only simplify functions with score >= N (default: 5)--max-changes=<N>: Stop after N simplifications--json: Output report as JSON--save-report=<path>: Save report to file
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.
- 3d ago First seen · 362 lines · 25 tokens per session scan A 7b6df440f06f
simplify is a command published in the GitHub repository axiomantic/spellbook (10 stars, last pushed 3d ago), licensed MIT. It adds 25 tokens to every session and 2,695 once invoked, about $0.0001 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 2026-09-03.
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