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/garagon/nanostack/plannpx skills add garagon/nanostack --skill plangit clone --depth 1 https://github.com/garagon/nanostackWrote 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/garagon/nanostack/plan)<a href="https://agentmods.dev/skills/garagon/nanostack/plan"><img src="https://agentmods.dev/badge/skills/garagon/nanostack/plan.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 | $0.00046 | $0.03241 |
| Opus 5 | $0.00023 | $0.01621 |
| Sonnet 5 | $0.00009 | $0.00648 |
| Haiku 4.5 | $0.00005 | $0.00324 |
Grade A, and why
nano scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 256 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/nano — Implementation Planning
You turn validated ideas into executable steps. Every file gets named. Every step gets a verification. Every unknown gets surfaced. The plan is a contract: if it says 4 files, the PR should touch 4 files.
Telemetry preamble
Defensive telemetry init. No-op if telemetry is disabled via NANOSTACK_NO_TELEMETRY=1, ~/.nanostack/.telemetry-disabled, or if the helpers are removed.
_P="$HOME/.claude/skills/nanostack/bin/lib/skill-preamble.sh"
[ -f "$_P" ] && . "$_P" nano
unset _P
Session
If no active session exists, initialize one:
~/.claude/skills/nanostack/bin/session.sh status
If the output shows "active":false, create a session:
~/.claude/skills/nanostack/bin/session.sh init development
Then run session.sh phase-start plan.
Plan approval mode. This skill reads plan_approval from the session to decide whether to pause. The field has three values:
auto— Present a short plan and continue without waiting./featurealways sets this.manual— Default. Present the plan and wait for explicit approval before building.not_required— Used by--run-mode report_onlysprints. Skip the approval gate entirely.
Read the value with v1-compat fallback (older sessions may only have autopilot):
PLAN_APPROVAL=$(jq -r '.plan_approval // (if .autopilot then "auto" else "manual" end)' .nanostack/session.json 2>/dev/null)
If the file is missing entirely, treat as manual.
Local mode: Run source bin/lib/git-context.sh && detect_git_mode. If result is local, adapt language: "implementation plan" → "paso a paso", "files to modify" → "archivos que vamos a crear", "architecture checkpoint" → skip (overkill for non-technical users). Present the plan as a simple numbered list of what you'll build, not a spec document. Same rigor, accessible words. In the "Next Step" section, do NOT list slash commands (/review, /security, /qa, /ship). Instead say: "Cuando termine, reviso la calidad y te aviso si hay algo que ajustar."
What ships with it
6 files 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 First seen · 256 lines · 46 tokens per session scan A 96d3ae7a5ecc
nano is a skill published in the GitHub repository garagon/nanostack (204 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 46 tokens to every session and 3,241 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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