weftgate

Catch broken connections in agent-written code before it ships.

A mistyped environment variable. An import missing from the lockfile. A FastAPI route pointing at a handler that does not exist. Weftgate checks these connections against your repository through one local CLI, MCP server, hook, or GitHub Action.

No API key. No runtime dependencies. No network calls on the default verification path.

Watch the full demo · Transcript and reproducible evidence · How to write an oracle

Try it

pip install weftgate
cd /path/to/your/repo
weftgate doctor                  # see which contracts can be checked
weftgate audit                   # inspect the current repository
weftgate check app/main.py        # check a file or directory

From source: pip install git+https://github.com/Avinash-Amudala/weftgate.git. For development, bash scripts/bootstrap.sh installs the extras and runs the offline self-test.

The demo uses an intentionally broken fixture, not a field benchmark:

REJECT  import 'requestz'       → did you mean requests?
REJECT  env var 'DATABSE_URL'   → did you mean DATABASE_URL?
REJECT  handler 'helth'         → did you mean health?

Fix the three names and the fixture passes. A computed key such as os.environ[key] returns review, because static analysis cannot establish its value. To reproduce: weftgate eval mutate --fixture --seed 13.

What the result means

The rule is block only on a positive, machine-checkable falsehood. Suggestions accompany findings when a nearby candidate exists. An accept verdict is not a test suite result or proof that the application works; inspect coverage with weftgate doctor.

Supported contracts in v0.1

This is an early static analyzer with bounded parsers. It does not execute your app, replace tests or a security scanner, or cover every framework. Python, Node, and monorepo import resolution can depend on runtime configuration. Missing or ambiguous evidence must soften; please report a false block with a minimal reproduction. Historical field runs document methods and limitations, rather than a claim of zero false positives.

Use it with your agent

weftgate setup --agents claude,cursor,vscode
weftgate setup --hooks             # review the generated local configuration

The standard-library MCP server requires no extra package. Example MCP configuration:

{"mcpServers": {"weftgate": {"command": "weftgate", "args": ["mcp"]}}}

Run the server with the repository as its working directory. weftgate setup --agents all writes supported project configs and prints snippets for clients with global settings. CLI and MCP use the same gate functions. Tools include check_change, check_claim, audit, suggest, index_status, and index.

CLI and CI

git diff | weftgate check -
weftgate check --staged
weftgate check --path app/main.py --content proposed.py
weftgate claim '[{"kind":"route","method":"POST","path":"/users"}]'
weftgate audit --format=json
weftgate index --show routes

Exit codes: 0 allows the change, 1 blocks according to policy, 2 means a usage or configuration error. Use --format=github for workflow annotations.

name: Verify connections
on: [pull_request]
permissions:
  contents: read
jobs:
  verify:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0
      - uses: Avinash-Amudala/weftgate@v0.1.0
        with:
          mode: check             # or audit to inspect the repository

The Action supports base, paths (shell-quoted paths, no shell expansion), block-on, and python-version. Use a full checkout for diff ancestry. The pre-commit hooks use the same gate; pin rev: v0.1.0.

Configure the contract

# weftgate.toml
[weftgate]
oracles = ["env_vars", "imports_lockfile", "routes_fastapi"]
block_on = "reject"                 # reject | review | never
env_declared_in = [".env.example"]

Precedence: WEFTGATE_* environment variables, repository configuration, user configuration, then defaults. The index lives in the user cache, outside the repo. weftgate doctor explains the selected configuration and missing contracts.

Outcome claims such as “tests passed” need machine-checkable evidence. Re-running a named test command or probing a URL requires explicit --run and the configured allowlist. See security and execution boundaries.

Optional memory integration

Weftgate exposes memory anchor, memory check, and memory changes through the CLI and MCP. With mnemo installed in the same interpreter, add "oracles": ["weftgate.memory"] to .mnemo.json to check structured memory claims.

Changed evidence keeps memories stale; checking does not silently replace the original hashes or prove remembered prose. See the integration contract. Mnemo is a separate companion repository and is not required to use Weftgate.

Contribute

bash scripts/bootstrap.sh
.venv/bin/ruff check .
.venv/bin/ruff format --check .
.venv/bin/mypy weftgate
.venv/bin/python -m weftgate.selftest
.venv/bin/python -m pytest -q --cov=weftgate --cov-fail-under=85

Start with CONTRIBUTING.md, the oracle guide, and AGENTS.md. New oracles need a real broken example, a correct example, and a dynamic case that reviews. Reproducible false blocks and missing-contract reports are especially useful.

Apache-2.0 · Changelog · Launch plan