Define testable claims about your project, run them, and crystallize results into a seed. Use when you need to verify that theory matches implementation, track what passes and what breaks, and identify where potential is blocked.

Assertion Verifier — Claims Meet Reality

Register testable assertions about your project. Each assertion has an ID, a claim, and a test function. The verifier runs them all and produces a structured report: PASS / FAIL / SKIP.

Assertion Format

Each assertion is a dict:

{
    "id": "AUTH_01",
    "claim": "Login endpoint returns 200 for valid credentials",
    "test": lambda: check_login_endpoint(),  # -> (bool, detail_string)
    "source": "API spec v2.1",
    "group": "auth"  # optional grouping
}

The test function must return (passed: bool, detail: str). If it raises an exception, the assertion is marked SKIP.

Integration with Seed Cycle

The assertion verifier feeds directly into seed_cycle.py:

from seed_cycle import ASSERTIONS, run_cycle

ASSERTIONS.extend([
    {"id": "DB_01", "claim": "Migration is up to date", "test": check_migration},
    {"id": "API_01", "claim": "Health endpoint responds", "test": check_health},
])

run_cycle(update=True)  # runs assertions, crystallizes into seed

What the Results Mean

Status	Meaning	Seed Effect
PASS	Claim confirmed by data	If ALL pass: "suspicious symmetry" tension
FAIL	Claim contradicted by data	High-priority "contradiction" tension
SKIP	Test can't run (missing prerequisite)	"Blocked potential" entry

Usage Patterns

Nightly verification:

python -c "
from seed_cycle import ASSERTIONS, verify_assertions, crystallize_seed, load_seed
# ... register assertions ...
results = verify_assertions()
crystallize_seed(results, load_seed())
"

Interactive check:

> verify my assertions

The coder runs all registered assertions and reports results.

Key Principle

Add tests that CAN fail. If everything always passes, you're testing tautologies. The value is in the FAIL and SKIP results — they show where the system's real edges are.

$ARGUMENTS

Eval

Trigger Tests

Appropriate prompts for this skill -> activates

Unrelated prompts -> does NOT activate

Fidelity Tests

Given valid input: produces expected output

Given edge case: handles gracefully

Always reports what was done

assertion-verifier