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Mold Gallery

A curated selection of molds from the official registry, showcasing what fimod can do out of the box. All of these are available immediately after running fimod registry setup.

🌐 HTTP & APIs

@gh_latest — GitHub latest release

Fetches the latest release tag from any GitHub repository. With --arg asset, resolves the full download URL for a specific release asset, substituting {version} and {tag} placeholders automatically.

# Get the latest release tag
fimod s -i https://github.com/cli/cli/releases/latest -m @gh_latest
# → v2.67.0

# Resolve a release asset URL
fimod s -i https://github.com/cli/cli/releases/latest -m @gh_latest \
  --arg repo=cli/cli \
  --arg asset=gh_{version}_linux_amd64.tar.gz
# → https://github.com/cli/cli/releases/download/v2.67.0/gh_2.67.0_linux_amd64.tar.gz

Pipe the resolved URL directly into a second fimod invocation to download the asset — no xargs, no shell intermediary:

# Download, filename inferred from the URL
fimod s -i https://github.com/sinelaw/fresh/releases/latest \
  -m @gh_latest \
  --arg repo="sinelaw/fresh" \
  --arg asset='fresh-editor_{version}-1_amd64.deb' \
  | fimod s -I - --output-format raw -O

# Download to an explicit filename
fimod s -i https://github.com/sinelaw/fresh/releases/latest \
  -m @gh_latest \
  --arg repo="sinelaw/fresh" \
  --arg asset='fresh-editor_{version}-1_amd64.deb' \
  | fimod s -I - --output-format raw -o fresh-editor.deb

@download — File download (wget-like)

Downloads a URL to a local file. The output filename defaults to the last path segment of the URL; override it with --arg out.

# Download to the inferred filename
fimod s -i https://example.com/data/archive.tar.gz -m @download
# → writes archive.tar.gz

# Override the output filename
fimod s -i https://example.com/data/archive.tar.gz -m @download --arg out=backup.tar.gz
# → writes backup.tar.gz

Handles binary content correctly (images, archives, binaries) via the raw binary pass-through.

🛠️ Developer Tooling

@poetry_migrate — Migrate pyproject.toml to Poetry 2 / uv

Converts a legacy Poetry pyproject.toml (1.x) to the modern PEP 621 format — either for Poetry 2 or uv.

# Migrate to uv (default)
fimod s -i pyproject.toml -m @poetry_migrate -o pyproject.toml

# Migrate to Poetry 2
fimod s -i pyproject.toml -m @poetry_migrate -o pyproject.toml --arg target=poetry2

What gets migrated:

  • [tool.poetry] metadata → [project] (name, version, description, authors, …)
  • Dependency constraints (^1.2.3, ~1.2.3, *) → PEP 440 equivalents
  • [tool.poetry.dev-dependencies] / groups → [dependency-groups] (PEP 735)
  • [[tool.poetry.source]] → [[tool.uv.index]]
  • build-system updated to hatchling (uv) or poetry-core>=2.0.0 (Poetry 2)

⚙️ DevOps & Config

@yaml_merge — Patch a YAML file

Applies a set of path=value assignments to an existing YAML document using dot-path notation. Useful for patching Kubernetes manifests or any structured config without a full template engine.

# Scale a deployment and tag it for production
fimod s -i deployment.yaml -m @yaml_merge \
  --arg set="spec.replicas=3,metadata.labels.env=prod" \
  -o deployment.yaml

Values are auto-cast: true/false become booleans, numeric strings become integers.

# Before
spec:
  replicas: 1
metadata:
  labels: {}

# After
spec:
  replicas: 3
metadata:
  labels:
    env: prod

@skylos_to_gitlab — Dead code report → GitLab Code Quality

Converts Skylos dead code analysis output to the GitLab Code Quality (Code Climate) JSON format, ready to upload as a CI artifact.

# In a GitLab CI job
skylos --json > skylos_report.json
fimod s -i skylos_report.json -m @skylos_to_gitlab -o gl-code-quality-report.json

Each finding becomes a Code Climate issue with a stable fingerprint (MD5 of check name + file + line + symbol), so GitLab can track it across pipeline runs.

🔍 Data Exploration

@jq_compat — Common jq operations

A lightweight jq-compatible interface for the three most-used operations: get (dot-path extraction), map (field projection), and select (filtering). Useful when you want the ergonomics of jq without the dependency.

# Extract a nested field
fimod s -i data.json -m @jq_compat --arg get=user.address.city

# Project a single field from an array
fimod s -i users.json -m @jq_compat --arg map=name

# Filter by field value
fimod s -i users.json -m @jq_compat --arg select=active=true

🛡️ Data Quality

@anonymize_pii — Hash PII fields

Replaces the values of specified fields with their SHA-256 hash. Works on both arrays of objects and single objects.

fimod s -i users.json -m @anonymize_pii --arg fields=email,phone -o users_anon.json

// Before
[{"id": 1, "email": "alice@example.com", "phone": "555-0100"}]

// After
[{"id": 1, "email": "a4c2e...", "phone": "f91b3..."}]

The original id and any non-listed fields are preserved. Deterministic hashing means the same input always produces the same fingerprint — useful for consistent pseudonymisation across datasets.