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 musterhq/muster --skill muster-frappe-metadatagit clone --depth 1 https://github.com/musterhq/musterWrote 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/musterhq/muster/muster-frappe-metadata)<a href="https://agentmods.dev/skills/musterhq/muster/muster-frappe-metadata"><img src="https://agentmods.dev/badge/skills/musterhq/muster/muster-frappe-metadata/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/musterhq/muster/muster-frappe-metadata"><img src="https://agentmods.dev/badge/skills/musterhq/muster/muster-frappe-metadata.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00069 | $0.00667 |
| Opus 5 | $0.00034 | $0.00333 |
| Sonnet 5 | $0.00014 | $0.00133 |
| Haiku 4.5 | $0.00007 | $0.00067 |
Grade A, and why
muster-frappe-metadata 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 12d 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 — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Muster Frappe Metadata
Treat every Frappe customization as a typed, reviewable, reversible change set rather than free-form code or direct database mutation.
Workflow
- Inspect target Frappe version, installed apps, existing metadata, hooks, fixtures, and customizations.
- Load
frappe-agent:frappe-customizationandfrappe-agent:frappe-doctype-design; add backend, SQL, ERPNext, Builder, or Insights skills when the surface requires them. - Choose the least invasive layer: runtime configuration, Custom Field/Property Setter, fixture, app-owned standard metadata, patch, then framework override only when necessary.
- Produce a typed plan with prerequisites, affected records, before snapshot, after value, risk, validation, inverse operation, and approval class.
- Preview semantic diffs in Frappe. Require explicit approval for schema, permissions, destructive data, executable code, or externally visible artifacts.
- Apply idempotently in dependency order. Verify metadata caches, migrations, permissions, list/form behavior, reports, prints, and mobile rendering.
- Persist evidence and a tested rollback or forward-repair path.
Read frappe-change-set-contract.md before implementing the planner or executor.
Surface Invariants
- A Frappe
Workflowis a document state machine attached to a DocType. A Muster workflow is an agent execution graph. Name and model them separately in plans, schemas, UI, APIs, and tests. - Frappe Workflow changes preserve reachable states, one valid transition path, role eligibility, docstatus semantics, and existing submitted-document behavior. Exercise every transition as an eligible and ineligible user.
- Query and Script Reports declare columns, filters, reference DocType, permission checks, bounded queries, empty/error behavior, export behavior, and representative result assertions.
- Print Formats and Letter Heads render verified PDF/HTML with escaped untrusted values, correct pagination, translations, attachments/images, and permitted field visibility.
- Client/Server Scripts, custom HTML/Jinja, Web Pages, Webhooks, and code-bearing reports are privileged executable surfaces. Prefer typed generators and reviewed app code; require static checks, explicit approval, sandbox constraints, and injection tests.
What ships with it
2 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.
- 12d ago First seen · 38 lines · 69 tokens per session scan A 4bc4beaca072
muster-frappe-metadata is a skill published in the GitHub repository musterhq/muster (11 stars, last pushed 8d ago), licensed MIT. It adds 69 tokens to every session and 667 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.
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