Skip to content
predraw.validator
Updated Edit
On this page

JSON Schema validation for predraw scene and config files.

#predraw.validator

#predraw.validator

strictspec-backed validation for predraw scene and config documents.

The validation engine is generated from predraw/schema/*.schema.toml by strictspec gen (driven by strictspec.toml); the generated modules are predraw._scene_validator and predraw._config_validator. This module is a thin adapter that keeps predraw's dict-in / list[str]-out surface for callers (the CLI validate command and the test suite) and provides the load-path gate that hard-errors on any diagnostic.

Behaviour differences from the legacy jsonschema engine are intentional and enforced by strictspec: documents must carry a top-level integer format_version (the version gate); alias pairs (camelCase canonical + snake_case) may not both be present; numeric lexemes that float64 cannot represent exactly are refused; unknown keys are always a hard error.

#SchemaValidationError

Raised by the load path when a scene or config document fails validation.

#validate_scene

python
def validate_scene(data: dict) -> list[str]

Validate a scene dict. Returns rendered diagnostics (empty = valid).

#validate_config

python
def validate_config(data: dict) -> list[str]

Validate a config dict. Returns rendered diagnostics (empty = valid).

#ensure_valid_scene

python
def ensure_valid_scene(raw: bytes) -> None

Validate raw scene JSON bytes; raise SchemaValidationError on any diagnostic.

Raw bytes (not a re-serialized dict) are validated so the byte-level lexeme checks (e.g. unrepresentable numbers) see the document exactly as written.

#ensure_valid_config

python
def ensure_valid_config(raw: bytes) -> None

Validate raw config JSON bytes; raise SchemaValidationError on any diagnostic.

#_diagnostics

python
def _diagnostics(module, raw: bytes) -> list[str]

Run a generated validator over raw JSON bytes and render its diagnostics.

More tools from this site

  • claudestream Drive Claude Code from Python: run it as a subprocess and read its output as typed events, with async and sync sessions, sandbox policies, and tools you define in Python
  • claudewheel A TUI Claude Code Launcher that lets you have more than one profile, manage sessions lifecycle, pick the exact CC version, model to use (even older unlisted ones), pick which GitHub account to use, etc.
  • dirstat Fast, single-binary directory statistics CLI: every file under a tree grouped by format, with counts, sizes, and lines of code, as a colored terminal table or as JSON
  • fastware A batteries-included ASGI framework: msgspec JSON, a managed Granian server, dependency injection, SSE, WebSockets, auth, and a test client
  • go-toml-edit Zero-dep TOML editing library for Go with comment preservation
  • howmuchleft The fastest Claude Code statusline: context window, 5-hour, and weekly limit usage as three customizable gradient bars, rendering in about 6 ms
  • orxtra
  • pgdesign
  • reposummary Turn a git repository's history into a Markdown journal: pick a time window or revision range and get a readable digest of what changed, optionally narrated by an LLM
  • rlsbl Release orchestration and project scaffolding CLI that bumps versions, validates a structured JSONL changelog, tags only the commit CI verified, and publishes to npm, PyPI, Go and more
  • safegit git wrapper CLI that gives each commit its own temporary index and retries ref updates on conflict, so concurrent agents share one repository
  • saferm Command-line replacement for rm that archives every deletion with a mandatory reason and the context it ran in, so deleted files can be listed, inspected and restored
  • selfdoc Static Site Generator that builds a project's documentation site directly from its source code, so the docs can never drift from the code they describe, with SEO/AEO, first-class blog, search, and cross-project linking built in
  • strictcli
  • stricttest An always-on test-isolation floor: a pytest plugin and a Go env-hygiene module that make a test suite structurally unable to reach real credentials, the real HOME, the network, or the development repository.
  • wesktop A Python framework that turns an ASGI web app into a desktop application, serving it from a local Granian server and displaying it in a native OS window via pywebview
Search