aptitude-resolver 0.0.1

Deterministic package-manager-style resolver for AI skills

Aptitude Resolver

Aptitude is a deterministic, package-manager-style resolver for AI skills.

The system is intentionally split in two:

• Aptitude Server owns registry data, metadata, immutable artifacts, and discovery indexes
• Aptitude owns intent interpretation, candidate selection, dependency resolution, governance, lock generation, and execution planning

Current CLI

Primary commands:

• aptitude install "<query>"
• aptitude sync --lock aptitude.lock.json
• aptitude manifest

Internal preview command:

• aptitude resolve "<query>"

Running aptitude with no arguments launches the install-first wizard. install and sync stay as the promoted task commands, while manifest exposes the complete command and flag surface. resolve still exists for preview, debugging, and CI, but it is hidden from normal CLI help.

How To Install

Install the resolver and its development dependencies with uv:

uv sync --extra dev

This creates the local environment from pyproject.toml and makes the aptitude entrypoint available through uv run or an activated environment.

Packaging And Publishing

This project builds and publishes as a normal Python package. uv is the build and publish tool, and the release registry is PyPI. There is no separate special "uv registry" format.

The packaging metadata lives in pyproject.toml:

• [project] defines the package name, version, dependencies, and console entry point
• [project.scripts] maps the installed aptitude command to aptitude.interfaces.cli.main:main
• [build-system] tells uv to build the package with uv_build

Build the package artifacts locally:

make package

make package runs uv build --no-sources and creates:

dist/*.whl
dist/*.tar.gz

The wheel is the main installable artifact. It contains the aptitude package, its dependency metadata, and the aptitude console script.

For a local manual publish with a PyPI API token:

export PYPI_API_TOKEN=your-pypi-token
make build-publish

make build-publish:

• requires PYPI_API_TOKEN
• builds fresh artifacts into .build-publish-dist/
• publishes with uv publish
• defaults to the production PyPI upload endpoint

To rehearse the local flow against TestPyPI instead of production PyPI:

export PYPI_API_TOKEN=your-testpypi-token
make build-publish REPOSITORY=testpypi

For the normal release path, publish to PyPI through GitHub Actions trusted publishing:

git tag v0.0.1
git push origin v0.0.1

The release workflow lives at .github/workflows/publish.yml and:

• triggers on tags matching v*
• builds the wheel and sdist with uv build --no-sources
• publishes with pypa/gh-action-pypi-publish
• authenticates to PyPI with GitHub OIDC trusted publishing
• does not use PyPI API tokens or repository secrets for the CI release path

The publish job uses the GitHub Environment pypi. That is not required by PyPI itself, but it is recommended because it gives releases a dedicated protection boundary in GitHub.

Install and run after publishing:

uv tool install aptitude
aptitude --help

For one-off execution without a persistent install:

uvx aptitude --help

Use this mental model:

• make package builds the distributable artifacts
• make build-publish performs a local token-based publish to PyPI or TestPyPI
• pushing a v* tag triggers the trusted publishing workflow
• uv tool install aptitude installs the published CLI
• aptitude ... is the command end users run after installation

How To Use

For repo-local development, typical usage starts with one of these commands:

PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main
PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main --help
PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main install "Postman Primary Skill"
PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main sync --lock aptitude.lock.json
PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main manifest

The no-args entrypoint launches the install-first wizard. Use install for fresh planning from a query, sync --lock for replaying an existing lockfile, and manifest for the full capability map. The help text and examples still use the logical aptitude command name, but the verified repo-local entrypoint is the module invocation above.

For published usage, prefer the installed CLI:

aptitude --help
aptitude install "Postman Primary Skill"
aptitude sync --lock aptitude.lock.json
aptitude manifest

What Works Today

• discovery-backed query resolution from human-readable input
• resolver-owned candidate version selection
• deterministic recursive dependency graph resolution
• candidate-policy filtering and graph governance before lock generation
• workspace policy loading from aptitude.toml
• hard policy CLI overrides for fresh planning
• rich lockfile generation, serialization, parsing, and replay
• lock-driven execution plan generation
• local materialization from either a fresh plan or an existing lockfile
• sync --lock as the lock-replay equivalent of uv sync
• registry caching and bounded transient retry
• additive telemetry for planning and materialization stages
• deterministic lockfiles for identical logical inputs
• trace output for discovery, selection, resolver, lock, and execution steps

What Is Still Incomplete

• organization-managed policy loading is not implemented yet
• broader organization-specific rules are not implemented yet
• winner-vs-runner-up explanation still derives from parallel explanation logic instead of directly from reranker output
• plugins/ extensibility is not implemented yet
• MCP and SDK interfaces are not implemented yet

Selection, Governance, And Integrity Direction

The canonical architecture now defines these required semantics:

• server provides immutable metadata such as lifecycle, trust, token, size, and checksum facts
• resolver owns policy and candidate selection
• governance is split into:
  • candidate-policy filtering before final ranking and final root selection
  • full graph governance after resolution and before lock generation
• ranking compares only policy-compliant candidates
• phase 1 checksum verification uses server-published sha256 checksum metadata and fails fast on mismatch

Current code now implements Governance Phase 1, profile-aware ranking, and explainability snapshots. The canonical source of truth for remaining evolution lives under docs/README.md.

Current User Flows

Fresh planning and install:

install query
-> discovery
-> resolver
-> governance
-> lockfile
-> execution plan
-> materialization

Lock replay:

sync --lock aptitude.lock.json
-> lockfile parse
-> lock replay
-> execution plan
-> materialization

Example Commands

Install from a query:

aptitude install "Postman Primary Skill"

Install as JSON for automation:

aptitude install "Postman Primary Skill" --json

Inspect the complete CLI surface:

aptitude manifest

Sync from an existing lockfile:

aptitude sync --lock aptitude.lock.json

Preview the resolved graph, lock, and execution plan without materializing:

uv run python -m aptitude.interfaces.cli.main resolve "Postman Primary Skill"

Current Package Map

src/aptitude/
  application/
    dto/
    queries/
    use_cases/
  cache/
  discovery/
    intent/
    query_builder/
    reranking/
  domain/
    errors/
    models/
    policy/
    tracing/
  execution/
  governance/
  interfaces/
    cli/
  lockfile/
  registry/
  resolution/
    conflict/
    graph/
    normalizer/
    solver/
    validation/
  shared/
    config/
    logging/
  telemetry/

Current Registry Contract Used By The Resolver

The resolver currently talks to the live registry through registry/ using these runtime paths:

• POST /discovery
• GET /skills/{slug}
• GET /skills/{slug}/{version}
• GET /resolution/{slug}/{version}
• GET /skills/{slug}/{version}/content

The resolver treats the server as a source of immutable facts and candidate generation only. Final ranking, version choice, solving, policy enforcement, lock generation, and execution planning remain resolver-owned.

Development

Requirements:

• Python >=3.9

Run the CLI:

PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main --help
PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main install "Postman Primary Skill"
PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main sync --lock aptitude.lock.json

Or via Python:

PYTHONPATH=src .venv/bin/python -m aptitude.interfaces.cli.main --help

Developer workflow:

make help
make format
make format-check
make lint
make typecheck
make test
make test-cov
make check

Source Of Truth Docs

Start with the docs index:

• docs/README.md

The canonical architecture pair for future implementation work is:

• docs/architecture/system-overview.md
• docs/architecture/decision-rules.md

Before any non-trivial implementation or refactor, read both.

Supporting docs:

• docs/contributors/README.md
• docs/reference/recommended-libraries.md
• docs/roadmap/README.md

The docs/reference/openapi/ directory is kept as raw server reference material, not as the sole source of truth for runtime behavior.