finfocus-plugin-dev SKILL.md skillA
finfocus-plugin-dev from rshade/finfocus is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rshade/finfocus/finfocus-plugin-dev@git:20261003.811835dPins git:20261003.811835d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rshade/finfocus
- Path
agent-skills/finfocus-plugin-dev/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261003.811835d, committed Oct 3, 2026
- Size
- 8,892 bytes
- Repository stars
- 11
- License
- Apache-2.0
Implement and maintain a FinFocus cost plugin in a repository scaffolded by `finfocus plugin init`. Use when adding or changing pricing logic in a plugin, adding a resource type, writing the Supports handler, returning GetProjectedCost or GetActualCost results, testing a plugin locally against a Pulumi plan, or installing a plugin build into `~/.finfocus/plugins`. Triggers on: "implement GetProjectedCost", "add a resource type to my plugin", "plugin Supports", "finfocus plugin", "pluginsdk…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
<!-- Copyright 2025-2026 Richard Shade. Licensed under Apache-2.0. --> <!-- SPDX-License-Identifier: Apache-2.0 --> # FinFocus Plugin Development A FinFocus plugin is a standalone binary that serves the `CostSourceService` gRPC API from `github.com/rshade/finfocus-spec/sdk/go/pluginsdk`. The `finfocus` CLI launches it, asks `Supports`, then calls `GetProjectedCost` (and optionally `GetActualCost`, `GetRecommendations`, and others) per resource. This repository was scaffolded by `finfocus plugin init`. ## Rules - **Never hand-edit SDK-version state** (the `finfocus-spec` line in `go.mod`, `SpecVersion`, workflow pins). Run `finfocus plugin upgrade` and follow the `finfocus-plugin-upgrade` skill. - **Never fabricate prices.** If the plugin cannot price a resource, return "not supported" from `Supports` or an error from `GetProjectedCost`. Do not guess, and do not return a default. The scaffold's example rates in `calculateEC2InstanceCost` are placeholders: replace them. Scaffolds from finfocus v0.4.0 and earlier also default a missing instance type to `t3.micro` and price unknown types at the `t3.micro` rate; remove both. …
Read the whole file at its exact version.
How to install
mdr add rshade/finfocus/finfocus-plugin-dev@sha256:180d5d22d86b01eeThe line at the top of this page pins the label git:20261003.811835d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_u6267verdnjobdz7)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 3, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8892 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
rshade/finfocus · 11 stars · license Apache-2.0 · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_u6267verdnjobdz7 GET https://markdownregistry.com/api/v1/resolve?ref=rshade/finfocus/finfocus-plugin-dev GET https://markdownregistry.com/api/v1/blob/180d5d22d86b01eea229927a385d67162540d5e619275c443e2408d59346e6f6
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.