fm

A command that runs Apple’s built-in language model directly on a Mac. It works locally on macOS 26 with Apple Intelligence enabled, without sending prompts over the network.

In plain words
What is it for?
Use `/fm` to run a prompt, pipe text to it for tasks such as summarising, or use `--check` to see whether the Mac can run it.
Why use it?
It lets you use language-model features without installing Ollama or relying on an online service. It also keeps prompts on the device.

Command

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 commands/esaruoho/apple/fm
Clone the repo
git clone --depth 1 https://github.com/esaruoho/apple
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 268 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 $0.00051 $0.00268
Opus 5 $0.00026 $0.00134
Sonnet 5 $0.00010 $0.00054
Haiku 4.5 $0.00005 $0.00027

Measured 2d ago against content hash e3c825502ff6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fm 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.

commands/fm.md · 23 lines

What it actually says

Run a prompt through Apple's on-device LLM.

Use Bash to execute (one call):

/Users/esaruoho/work/apple/bin/fm $ARGUMENTS

Notes:

  • macOS 26 (Tahoe) + Apple Intelligence enabled. On the fleet that's CloudcityMacMini; on older macOS the tool prints a clear "needs macOS 26" message.
  • Apple-native: FoundationModels framework on the Neural Engine — no Ollama, no pip, no network. Verified on the Mini (2026-06-01): --check → available, ~2 s replies.
  • Prompt from args or stdin (echo text | fm to summarize). --system sets instructions.
  • See wiki/concepts/apple-silicon-ml.md. Reachable across the fleet via the Syncthing runner / Fleet.
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 First seen · 23 lines · 51 tokens per session scan A e3c825502ff6

Subscribe to this mod's changes

fm is a command published in the GitHub repository esaruoho/apple (11 stars, last pushed 5d ago), licensed MIT. It adds 51 tokens to every session and 268 once invoked, about $0.0003 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.