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Deterministic type safety via directed acyclic graphs for reasoning language models.
Analyze any repo's public API surface, extract a typed node registry, compose validated
execution DAGs from natural language, and compile them into native pipeline code with
GraphSentry-style (artifact, certificate) verification at every node boundary.
Code Scaffolding & Templates
Three layers compose into a single architecture:
Typed Node Registry — the repo's public functions/classes extracted as typed nodes with JSON Schema input/output contracts. The LLM selects from this registry; it never generates arbitrary code.
DAG Plan — a language-neutral execution graph where nodes reference registry entries and edges are schema-validated. No cycles, all inputs satisfied, all types compatible.
Certificates — each node emits an (artifact, certificate) pair. Certificates are
deterministic predicates evaluated from logged evidence. Failed certificates halt the
pipeline with diagnostic context. Based on GraphSentry (Li et al., 2026).
Parse $ARGUMENTS to determine which command to run:
analyzeExtract a typed node registry from the current repository.
python3 ~/.claude/skills/dag-typesafe/scripts/analyze.py [--language python|typescript|auto] [--output dag-registry.json]
extractors/dag-registry.json at repo rootcomposeGenerate a DAG plan from natural language using the typed registry.
The compose phase is endpoint-agnostic — it works with any OpenAI-compatible API (OpenRouter, Groq, Subq Code, local models) or in-session via Claude Code.
In-session mode (default): Build a structured prompt from the registry and task description, then use the current Claude Code session to generate the DAG plan.
Headless mode: Set DAG_LLM_BASE_URL and DAG_LLM_API_KEY environment variables
to point at any OpenAI-compatible endpoint.
python3 ~/.claude/skills/dag-typesafe/scripts/compose.py "task description" --registry dag-registry.json [--output dag-plan.json] [--provider session|openai]
dag-registry.jsonschemas/dag-plan.schema.jsondag-plan.jsoncompileCompile a validated DAG plan into native executable code.
python3 ~/.claude/skills/dag-typesafe/scripts/compile.py dag-plan.json [--target python|typescript] [--output pipeline.py]
dag-plan.json and dag-registry.json.model_validate() / Zod .parse())validateType-check an existing DAG plan against a registry.
python3 ~/.claude/skills/dag-typesafe/scripts/validate.py dag-plan.json --registry dag-registry.json
Checks: cycle detection, edge type compatibility, required input satisfaction, certificate predicate well-formedness, registry reference integrity.
registryInspect, filter, and query the typed node registry.
python3 ~/.claude/skills/dag-typesafe/scripts/registry.py [--filter "pattern"] [--show-schemas] [--stats]
All schemas live in schemas/ as JSON Schema (draft 2020-12):
dag-plan.schema.json — DAG plan format (nodes, edges, metadata)registry.schema.json — typed node registry formatcertificate.schema.json — GraphSentry certificate formatRead these schemas before generating or validating any DAG artifacts.
Language-specific type extractors in extractors/:
| Extractor | Source Types | Output |
|---|---|---|
python_extractor.py | Pydantic BaseModel, dataclass, TypedDict, function annotations | JSON Schema |
typescript_extractor.py | Zod schemas, interfaces, type aliases, function signatures | JSON Schema |
Each extractor walks the AST, identifies public API surface, and converts type definitions to JSON Schema for the registry. Internal/private symbols are excluded.
The compiler generates pipeline code inline (no external templates). Both Python and TypeScript targets produce complete executable files with:
For headless/CI use, configure via environment variables:
export DAG_LLM_BASE_URL="https://openrouter.ai/api/v1" # or Groq, Subq, local
export DAG_LLM_API_KEY="your-key"
export DAG_LLM_MODEL="anthropic/claude-sonnet-4-20250514" # model identifier
When these are unset, compose mode generates a structured prompt for in-session use.
This skill synthesizes patterns from:
Full source list: references/research-sources.md
name: dag-typesafe description: >- Analyze a repository's type system and generate type-safe DAG execution pipelines with GraphSentry-style certificate verification. This skill should be used when building LLM-driven workflows that need deterministic type safety, when composing typed operations into validated execution graphs, or when adding contract-checked pipeline orchestration to any codebase. Supports Python (Pydantic) and TypeScript (Zod). argument-hint: "[analyze|compose|compile|validate|registry] [args...]"
--- name: dag-typesafe description: >- Analyze a repository's type system and generate type-safe DAG execution pipelines with GraphSentry-style certificate verification. This skill should be used when building LLM-driven workflows that need deterministic type safety, when composing typed operations into validated execution graphs, or when adding contract-checked pipeline orchestration to any codebase. Supports Python (Pydantic) and TypeScript (Zod). argument-hint: "[analyze|compose|compile|validate|registry] [args...]" --- # dag-typesafe Deterministic type safety via directed acyclic graphs for reasoning language models. Analyze any repo's public API surface, extract a typed node registry, compose validated execution DAGs from natural language, and compile them into native pipeline code with GraphSentry-style `(artifact, certificate)` verification at every node boundary. ## Category Code Scaffolding & Templates ## Core Concepts Three layers compose into a single architecture: 1. **Typed Node Registry** — the repo's public functions/classes extracted as typed nodes with JSON Schema input/output contracts. The LLM selects from this registry; it never generates arbitrary code. 2. **DAG Plan** — a language-neutral execution graph where nodes reference registry entries and edges are schema-validated. No cycles, all inputs satisfied, all types compatible. 3. **Certificates** — each node emits an `(artifact, certificate)` pair. Certificates are deterministic predicates evaluated from logged evidence. Failed certificates halt the pipeline with diagnostic context. Based on GraphSentry (Li et al., 2026). ## Commands Parse `$ARGUMENTS` to determine which command to run: ### `analyze` Extract a typed node registry from the current repository. ```bash python3 ~/.claude/skills/dag-typesafe/scripts/analyze.py [--language python|typescript|auto] [--output dag-registry.json] ``` 1. Detect repo language(s) from file extensions and config files 2. Run the appropriate extractor(s) from `extractors/` 3. Walk the AST for public API surface only (exported functions, public classes, API endpoints) 4. Convert type annotations to JSON Schema 5. Output `dag-registry.json` at repo root ### `compose` Generate a DAG plan from natural language using the typed registry. The compose phase is **endpoint-agnostic** — it works with any OpenAI-compatible API (OpenRouter, Groq, Subq Code, local models) or in-session via Claude Code. **In-session mode (default):** Build a structured prompt from the registry and task description, then use the current Claude Code session to generate the DAG plan. **Headless mode:** Set `DAG_LLM_BASE_URL` and `DAG_LLM_API_KEY` environment variables to point at any OpenAI-compatible endpoint. ```bash python3 ~/.claude/skills/dag-typesafe/scripts/compose.py "task description" --registry dag-registry.json [--output dag-plan.json] [--provider session|openai] ``` 1. Load registry from `dag-registry.json` 2. Build structured prompt constraining LLM to node selection and parameterization 3. Generate DAG plan conforming to `schemas/dag-plan.schema.json` 4. Validate the plan (type compatibility, no cycles, all inputs satisfied) 5. Generate certificate predicates for each node 6. Output `dag-plan.json` ### `compile` Compile a validated DAG plan into native executable code. ```bash python3 ~/.claude/skills/dag-typesafe/scripts/compile.py dag-plan.json [--target python|typescript] [--output pipeline.py] ``` 1. Read validated `dag-plan.json` and `dag-registry.json` 2. Topologically sort nodes 3. Generate native pipeline code via inline code generation 4. Wrap each node call in schema validation (Pydantic `.model_validate()` / Zod `.parse()`) 5. Inject certificate predicate evaluation at every node boundary 6. Output executable pipeline file with zero runtime dependencies beyond standard validation libs ### `validate` Type-check an existing DAG plan against a registry. ```bash python3 ~/.claude/skills/dag-typesafe/scripts/validate.py dag-plan.json --registry dag-registry.json ``` Checks: cycle detection, edge type compatibility, required input satisfaction, certificate predicate well-formedness, registry reference integrity. ### `registry` Inspect, filter, and query the typed node registry. ```bash python3 ~/.claude/skills/dag-typesafe/scripts/registry.py [--filter "pattern"] [--show-schemas] [--stats] ``` ## Schemas All schemas live in `schemas/` as JSON Schema (draft 2020-12): - `dag-plan.schema.json` — DAG plan format (nodes, edges, metadata) - `registry.schema.json` — typed node registry format - `certificate.schema.json` — GraphSentry certificate format Read these schemas before generating or validating any DAG artifacts. ## Extractors Language-specific type extractors in `extractors/`: | Extractor | Source Types | Output | |-----------|-------------|--------| | `python_extractor.py` | Pydantic BaseModel, dataclass, TypedDict, function annotations | JSON Schema | | `typescript_extractor.py` | Zod schemas, interfaces, type aliases, function signatures | JSON Schema | Each extractor walks the AST, identifies public API surface, and converts type definitions to JSON Schema for the registry. Internal/private symbols are excluded. ## Code Generation The compiler generates pipeline code inline (no external templates). Both Python and TypeScript targets produce complete executable files with: - Certificate/CertificateError classes - Topologically sorted node execution - Per-node certificate emission and predicate evaluation - Predicate expression sandboxing (AST-validated safe subset only) ## LLM Provider Configuration For headless/CI use, configure via environment variables: ```bash export DAG_LLM_BASE_URL="https://openrouter.ai/api/v1" # or Groq, Subq, local export DAG_LLM_API_KEY="your-key" export DAG_LLM_MODEL="anthropic/claude-sonnet-4-20250514" # model identifier ``` When these are unset, compose mode generates a structured prompt for in-session use. ## Research Basis This skill synthesizes patterns from: - **GraphSentry** (Li et al., 2026) — certificate-driven typed DAGs, contract-checked graph surgery - **ChopChop** (Nagy et al., POPL 2026) — semantic constrained decoding via coinductive realizability - **PlanCompiler** (prnvh, 2026) — LLM confined to typed node registry selection - **PlanAI** (Provos, 2026) — Pydantic-typed DAG orchestration with automatic routing - **Agint** (Chivukula et al., 2025) — type floors (text→data→spec→code) in agentic graph compilation Full source list: `references/research-sources.md`
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Source needs review
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Review before install: Avoid automatic install
License: MIT
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Quality
60/100
Promising
Trust
51/100
Do not auto-install
Audit
69/100
Needs review
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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