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.
npx skills add OutlineDriven/odin-claude-plugin --skill axiom-modegit clone --depth 1 https://github.com/OutlineDriven/odin-claude-pluginWrote 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/skills/outlinedriven/odin-claude-plugin/axiom-mode)<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/axiom-mode"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/axiom-mode/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/skills/outlinedriven/odin-claude-plugin/axiom-mode"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/axiom-mode.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00037 | $0.01146 |
| Opus 5 | $0.00018 | $0.00573 |
| Sonnet 5 | $0.00007 | $0.00229 |
| Haiku 4.5 | $0.00004 | $0.00115 |
Grade A, and why
axiom-mode 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 4d 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.
Copies of this mod
2 near-identical copies found in the catalogue:
- axiom-mode — 94% identical, 110 lines differ
- axiom-mode — 94% identical, 110 lines differ
How it starts
The opening of the file, as written. The whole thing — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Axiom mode
Contract
| Field | Bound contract |
|---|---|
| Trigger | User requests axiom, axiom-mode, axiom-compact, formal-logic, or compact form. |
| Authority | Read-only. No file, VCS, credential, paid, published, deployed, or remote mutation. Changes response register only. |
| Side effect | None; response style only. |
| Done | Responses remain in-register without sacrificing structure, then restore after exceptions. |
Inputs
No external input required. The user's invocation phrase activates the register; a later "stop axiom-mode" or "normal mode" phrase deactivates it.
Procedure
-
Activate the Compacted Formal-logic English register. This ASCII-only register uses shortened-English keywords for logical connectives and follows predicate-calculus and Hoare-triple conventions for structural framing. Persist the register for every subsequent response until the user signals "stop axiom-mode" or "normal mode". Done when: the register is active and persists across responses.
-
Emit only allowed characters: A-Z, a-z, 0-9, hyphens, spaces, slash, underscore, and standard sentence punctuation (period, comma, colon, semicolon, parentheses, brackets, quotes). Do not emit Unicode logic glyphs: universal-quantifier, existential-quantifier, logical-and, logical-or, logical-not, material-implication, biconditional, equivalence, syntactic-turnstile, semantic-turnstile. Done when: the response contains only allowed characters.
-
Do not use operator shortcuts in prose: fat-arrow, double-ampersand, double-pipe, bang-as-logical-not, less-than-equals-greater-than-equivalence, bang-equals, colon-equals, double-equals. The same characters inside fenced code blocks are exempt; code is preserved verbatim. Done when: prose contains no operator shortcuts (code blocks exempt).
-
Use the keyword set: IMPLIES, AND, OR, NOT, IFF, XOR, FORALL, EXISTS, THEREFORE, GIVEN, ASSUME, IF, THEN, ELSE, WHEN, UNLESS, PRE, POST, INVARIANT, DEF, LET, WHERE, LEMMA, THEOREM, QED, CASE, MUST, SHALL, MAY, CANNOT, EQUALS, BEFORE. Done when: logical connectives use the keyword set.
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.
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.
- 4d ago Changed · -24 tokens per session c6252b2514ea
- 6d ago Changed · -54 lines · +9 tokens per session 0e23859cadfd
- 10d ago First seen · 103 lines · 52 tokens per session scan A f9893d8cdddc
axiom-mode is a skill published in the GitHub repository OutlineDriven/odin-claude-plugin (35 stars, last pushed yesterday), licensed Apache-2.0. It adds 37 tokens to every session and 1,146 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 2026-08-30.
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