Antithesis Launch

Prerequisites

• DO NOT PROCEED if snouty is not installed. See https://raw.githubusercontent.com/antithesishq/snouty/refs/heads/main/README.md for installation options.

Goal

Launch an Antithesis run in this order only:

1. docker compose build
2. snouty validate
3. if validation fails, stop and report the error
4. snouty run

Required Input

• duration in minutes is required. If the user did not provide it, ask before submitting the run.

Discovery

• Start from any user-provided path, command, or Antithesis directory name.
• Otherwise, inspect the repo to understand how the harness is wired. Check nearby AGENTS.md, README*, Makefile*, and Antithesis-specific scripts before choosing commands.
• Find the config directory by locating the docker-compose.yaml intended for Antithesis. Prefer directories like antithesis/config, but support non-standard layouts.
• Treat these as strong Antithesis signals: nearby scratchbook/ or test/ directories, compose content mentioning /opt/antithesis, ANTITHESIS_ env vars, setup_complete, or existing snouty examples.
• If multiple compose files look plausible, prefer the one referenced by repo docs or existing snouty run examples. If the choice is still ambiguous, ask the user instead of guessing.
• Use the directory containing docker-compose.yaml as the snouty validate <CONFIG> and snouty run --config <CONFIG> argument.
• Build against that exact file with docker compose -f <CONFIG>/docker-compose.yaml build. If docker compose is unavailable, fall back to docker-compose -f ... build.

Run Arguments

• Determine the webhook in this order: explicit user input, existing repo docs/scripts/examples, otherwise default to basic_test.
• snouty run --config requires ANTITHESIS_REPOSITORY. Reuse the current environment if it is already set. If not, stop and ask the user for it.
• Always set all of these explicitly:
  • --duration: the user-provided duration
  • --source: repo name
  • --test-name: repo name plus branch or config name
  • --description: short, readable description of the run, including details such as the branch name, currently goal, or what you changed since the last run.

Execution

• These commands can take a long time. Prefer background execution or generous timeouts instead of assuming quick completion.
• Do not run snouty run unless the build succeeded and snouty validate exited successfully.

docker compose -f "$CONFIG_DIR/docker-compose.yaml" build
snouty validate "$CONFIG_DIR"
snouty run \
  --webhook "$WEBHOOK" \
  --config "$CONFIG_DIR" \
  --duration "$DURATION" \
  --source "$SOURCE" \
  --test-name "$TEST_NAME" \
  --description "$DESCRIPTION"

Output

• Report the config directory, compose build command, validate command, and final snouty run command shape before submission.
• If validation fails, stop immediately and show the failing command plus the key error.

Self-Review

• The chosen config directory is the one that actually contains the Antithesis docker-compose.yaml.
• The build, validate, and run steps all point at the same config.
• snouty validate succeeded before snouty run was invoked.
• The run set source, test-name, description, and duration explicitly.
• Missing blockers such as duration, ANTITHESIS_REPOSITORY, or an ambiguous config location caused a stop instead of a bad submission.