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 agentmods add skills/onsails/skills/mimo-codenpx skills add onsails/skills --skill mimo-codegit clone --depth 1 https://github.com/onsails/skillsWhat 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 | $0.00075 | $0.01338 |
| Opus 5 | $0.00037 | $0.00669 |
| Sonnet 5 | $0.00015 | $0.00268 |
| Haiku 4.5 | $0.00007 | $0.00134 |
Grade A, and why
mimo-code 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.
How it starts
The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
mimo-code
Overview
Delegate a write-capable coding session to mimo, staying the conductor. Heavy
work and tokens move to mimo; you orchestrate and review the diff.
When to use
- The user invokes
/mimo-code [provider/model] [variant] <task>or asks to run/resume mimo. - A prior mimo session needs continuation (it asked something or was cut off).
The rule that shapes everything
Never run mimo in the main thread. ALWAYS dispatch the mimo-delegate subagent
(model sonnet) so the live NDJSON stream and any blocking stay out of the main
context. You only ever receive its distilled summary.
Parse the invocation
Raw slash-command arguments: $ARGUMENTS
Interpret as [provider/model] [variant] <task> (empty when triggered by description match rather than /mimo-code — then read intent from the user's message):
- A leading
xxx/yyytoken → model. A followingminimal|low|medium|high|max→ variant. - The rest is the task;
resume/continue→ resume the recorded session (see Resume). Natural-language requests map the same way.
Resolve the model — ASK, do not default (only when no model was given, fresh runs only)
- Gather options via the
mimo-resolvesubagent (model sonnet). It runs theresolve-modelslauncher and returns the authenticated provider∩modeloptionsandvariants— keeping the catalogue output out of the conductor's context. Empty options (no authenticated provider) → STOP and tell the user to runmimo providers login. - Using the returned
options(the authenticated intersection — count models, not providers): Exactly one usable model → auto-pick (asking is pointless). ≤4 → one AskUserQuestion listing them. >4 (the common real case — a single provider can expose dozens) → narrow, never dump: AskUserQuestion the provider first (the authenticated set is small), then AskUserQuestion ≤4 models for that provider — lead withmimo-resolve's recommended id, and rely on the auto-added Other free-text for the long tail. One authenticated provider offering several models is still "more than one" → ASK; "low-risk"/"mechanical"/cost or proactivity never justify a silent pick, and printing the whole catalogue for the user to retype an id verbatim is the anti-pattern to avoid. - Ask effort/variant with a ≤4 menu — AskUserQuestion caps at 4 options, so
you cannot list all five variants + a default. Offer
default(omit--variant) plus a few variants, each with a one-line description (defaultis the safe recommendation for a one-shot delegation);minimal/mediumreach via Other.
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.
- 2d ago First seen · 86 lines · 75 tokens per session scan A 50d30f45a5e4
mimo-code is a skill published in the GitHub repository onsails/skills (43 stars, last pushed 7d ago), licensed MIT. It adds 75 tokens to every session and 1,338 once invoked, about $0.0004 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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